checkpoint

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -7,16 +7,17 @@ body:
 - type: markdown
   attributes:
     value: |
-      Please provide a minimal code example that reproduces the bug if possible.
-      Reports with a reproducible example or detailed information will likely receive fixes faster.
+      - **Please provide a minimal code example that reproduces the Bug!** :bug:
+        Reports with a reproducible example and descriptive detailed information will likely receive fixes faster.
 
 - type: textarea
   id: description
   attributes:
     label: Description
     description: |
-      Describe the problem. Code example can be given here.
-    placeholder: Bug reports with reproducible code or detailed information will be fixed faster.
+      Use DETAILED DESCRIPTIVE information about the problem.
+      Here, you go into more details about your Bug report. This section can be a few paragraphs long.
+    placeholder: Bug reports with reproducible code and detailed information will be fixed faster.
   validations:
     required: true
     
@@ -24,9 +25,7 @@ body:
   id: nim-version
   attributes:
     label: Nim Version
-    description: |
-      Can be obtained from `nim -v` on the command line along with the OS/architecture.
-      For development versions, make sure to include the commit hash.
+    description: Copy and paste the output of `nim -v` on the command line. For development versions, make sure to include the commit hash.
   validations:
     required: true
 
@@ -35,7 +34,7 @@ body:
   attributes:
     label: Current Output
     description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
-    placeholder: Bug reports with reproducible code or detailed information will be fixed faster.
+    placeholder: Bug reports with reproducible code and detailed information will be fixed faster.
     render: text
 
 - type: textarea
@@ -43,14 +42,14 @@ body:
   attributes:
     label: Expected Output
     description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
-    placeholder: Bug reports with reproducible code or detailed information will be fixed faster.
+    placeholder: Bug reports with reproducible code and detailed information will be fixed faster.
     render: text
 
 - type: textarea
-  id: known-workarounds
+  id: possible-solution
   attributes:
-    label: Known Workarounds
-    description: Provide any known workarounds.
+    label: Possible Solution
+    description: Propose a possible solution.
   validations:
     required: false
 
@@ -65,9 +64,13 @@ body:
 - type: markdown
   attributes:
     value: |
-      - Please check whether the problem still exists in the devel branch, which can be installed via [choosenim](https://github.com/nim-lang/choosenim/), [nightlies](https://github.com/nim-lang/nightlies/), or by [creating a temporary build of the compiler](https://nim-lang.github.io/Nim/intern.html#debugging-the-compiler-building-an-instrumented-compiler).
+      - Thanks for your contributions!, your Bug report will receive feedback from the community soon...
+      - Please check whether the problem still exists in the devel branch, see [rebuilding the compiler](https://nim-lang.github.io/Nim/intern.html#rebuilding-the-compiler).
       - Consider writing a PR targetting devel branch after filing this, see [contributing](https://nim-lang.github.io/Nim/contributing.html).
-      - If it's a pre-existing compiler bug, see [debugging the compiler](https://nim-lang.github.io/Nim/intern.html#debugging-the-compiler) which should give more context on a compiler crash.
-      - If it's a regression, you can help us by identifying which version introduced the bug by [bisecting](https://nim-lang.github.io/Nim/intern.html#bisecting-for-regressions) or at least trying known past releases (e.g. `choosenim 2.0.0`).
-        The Nim repo also supports bisecting in issue comments by adding `!nim c`, `!nim js` etc. before a code block, see [nimrun-action](https://github.com/juancarlospaco/nimrun-action).
+      - If it's a pre-existing compiler bug, see [Debugging the compiler](https://nim-lang.github.io/Nim/intern.html#debugging-the-compiler)
+        which should give more context on a compiler crash.
+      - If it's a regression, you can help us by identifying which version introduced the bug,
+        see [Bisecting for regressions](https://nim-lang.github.io/Nim/intern.html#bisecting-for-regressions),
+        or at least try known past releases (e.g. `choosenim 2.0.0`). The Nim repo also supports online bisecting
+        via making a comment, which contains a code block starting by `!nim c`, `!nim js` etc. , see [nimrun-action](https://github.com/juancarlospaco/nimrun-action).
       - [Please, consider a Donation for the Nim project.](https://nim-lang.org/donate.html)

.github/workflows/bisects.yml

@@ -5,27 +5,19 @@ on:
     types: created
 
 jobs:
-  bisects:
-    if: |
-      github.event_name == 'issue_comment' && startsWith(github.event.comment.body, '!nim ') && github.event.issue.pull_request == null && github.event.comment.author_association != 'NONE'
-    strategy:
-      fail-fast: false
-      matrix:
-        platform: [ubuntu-latest, windows-latest, macos-latest]
-    name: ${{ matrix.platform }}-bisects
-    runs-on: ${{ matrix.platform }}
+  test:
+    runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+    - uses: actions/checkout@v3
 
-      - uses: jiro4989/setup-nim-action@v1
-        with:
-          nim-version: 'devel'
+    # nimrun-action requires Nim installed.
+    - uses: jiro4989/setup-nim-action@v1
+      with:
+        nim-version: 'devel'
 
-      - uses: juancarlospaco/nimrun-action@nim
-        if: |
-          runner.os == 'Linux'   && contains(github.event.comment.body, '-d:linux'  ) ||
-          runner.os == 'Windows' && contains(github.event.comment.body, '-d:windows') ||
-          runner.os == 'macOS'   && contains(github.event.comment.body, '-d:osx'    ) ||
-          runner.os == 'Linux' && !contains(github.event.comment.body, '-d:linux') && !contains(github.event.comment.body, '-d:windows') && !contains(github.event.comment.body, '-d:osx')
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
+    - name: Install Dependencies
+      run: sudo apt-get install --no-install-recommends -yq valgrind
+
+    - uses: juancarlospaco/nimrun-action@nim
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/ci_bench.yml

@@ -0,0 +1,115 @@
+name: Benchmarks CI
+on:
+  pull_request:
+  push:
+    branches:
+      - 'devel'
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-20.04]
+        cpu: [amd64]
+    name: '${{ matrix.os }}'
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60 # refs bug #18178
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 2
+
+      - name: 'Install node.js 16.x'
+        uses: actions/setup-node@v3
+        with:
+          node-version: '16.x'
+
+      - name: 'Install dependencies (Linux amd64)'
+        if: runner.os == 'Linux' && matrix.cpu == 'amd64'
+        run: |
+          sudo apt-fast update -qq
+          DEBIAN_FRONTEND='noninteractive' \
+            sudo apt-fast install --no-install-recommends -yq \
+              libcurl4-openssl-dev libgc-dev libsdl1.2-dev libsfml-dev \
+              valgrind libc6-dbg libblas-dev xorg-dev
+
+      - name: 'Add build binaries to PATH'
+        shell: bash
+        run: echo "${{ github.workspace }}/bin" >> "${GITHUB_PATH}"
+
+      - name: 'Build csourcesAny'
+        shell: bash
+        run: . ci/funs.sh && nimBuildCsourcesIfNeeded CC=gcc ucpu='${{ matrix.cpu }}'
+
+      - name: 'Build koch'
+        shell: bash
+        run: nim c koch
+
+      - name: 'Build Nim'
+        shell: bash
+        run: ./koch boot -d:release -d:nimStrictMode --lib:lib
+
+      - name: 'Build Nimble'
+        shell: bash
+        run: ./koch nimble
+
+      - name: 'Action'
+        shell: bash
+        run: nim c -r -d:release ci/action.nim
+
+      - name: 'Checkout minimize'
+        uses: actions/checkout@v3
+        with:
+          repository: 'nim-lang/ci_bench'
+          path: minimize
+
+      - name: 'Run minimize benchmarks'
+        shell: bash
+        run: ./minimize/minimize ci-bench
+
+      - name: 'Restore minimize cached database'
+        uses: actions/cache/restore@v3
+        with:
+          path: minimize.csv
+          key: minimize-db-key
+
+      - name: 'Update minimize db'
+        shell: bash
+        run: ./minimize/minimize update-db
+
+      - name: 'Save minimize cached database'
+        if: |
+          github.event_name == 'push' && github.ref == 'refs/heads/devel' &&
+          matrix.target == 'linux'
+        uses: actions/cache/save@v3
+        with:
+          path: minimize.csv
+          key: minimize-db-key
+
+      - name: 'Generate minimize report'
+        shell: bash
+        run: ./minimize/minimize generate-report
+
+      - name: 'Archive minimize report'
+        uses: actions/upload-artifact@v3
+        with:
+          name: minimize-report
+          path: |
+            minimize/minimize.html
+            minimize/minimize.csv
+
+      # Requires additional permissions, see:
+      # https://github.com/nim-lang/Nim/actions/runs/4778177321/jobs/8494423792?pr=21566
+      # - name: 'Publish HTML report'
+      #   uses: rossjrw/pr-preview-action@v1
+      #   with:
+      #     source-dir: minimize
+      #     umbrella-dir: minimize
+      #   env:
+      #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract md summary
+        run: |
+          cat minimize/summary.md  >> $GITHUB_STEP_SUMMARY

.github/workflows/ci_docs.yml

@@ -2,7 +2,8 @@ name: Nim Docs CI
 on:
   push:
     paths:
-      - 'compiler/**.nim'
+      - 'compiler/docgen.nim'
+      - 'compiler/renderverbatim.nim'
       - 'config/nimdoc.cfg'
       - 'doc/**.rst'
       - 'doc/**.md'
@@ -17,7 +18,8 @@ on:
   pull_request:
     # Run only on changes on these files.
     paths:
-      - 'compiler/**.nim'
+      - 'compiler/docgen.nim'
+      - 'compiler/renderverbatim.nim'
       - 'config/nimdoc.cfg'
       - 'doc/**.rst'
       - 'doc/**.md'
@@ -45,7 +47,7 @@ jobs:
           - target: windows
             os: windows-2019
           - target: osx
-            os: macos-12
+            os: macos-11
 
     name: ${{ matrix.target }}
     runs-on: ${{ matrix.os }}
@@ -53,7 +55,7 @@ jobs:
 
     steps:
       - name: 'Checkout'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
         with:
           fetch-depth: 2
 
@@ -109,7 +111,7 @@ jobs:
         if: |
           github.event_name == 'push' && github.ref == 'refs/heads/devel' &&
           matrix.target == 'linux'
-        uses: crazy-max/ghaction-github-pages@v4
+        uses: crazy-max/ghaction-github-pages@v3
         with:
           build_dir: doc/html
         env:

.github/workflows/ci_gcc14.yml

@@ -1,76 +0,0 @@
-name: GCC 14
-on:
-  pull_request:
-  push:
-    branches:
-      - 'devel'
-
-
-jobs:
-  build:
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-24.04]
-        cpu: [amd64]
-    name: '${{ matrix.os }}'
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 60 # refs bug #18178
-    steps:
-      - name: 'Checkout'
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 2
-
-      - name: 'Install node.js 20.x'
-        uses: actions/setup-node@v4
-        with:
-          node-version: '20.x'
-
-      - name: 'Install dependencies (Linux amd64)'
-        if: runner.os == 'Linux' && matrix.cpu == 'amd64'
-        run: |
-          sudo apt update -qq
-          sudo apt remove needrestart
-          DEBIAN_FRONTEND='noninteractive' \
-            sudo apt install --no-install-recommends -yq \
-              libcurl4-openssl-dev libgc-dev libsdl1.2-dev libsfml-dev \
-              valgrind libc6-dbg libblas-dev xorg-dev
-      - name: 'Install dependencies (Linux amd64 gcc 14)'
-        if: runner.os == 'Linux' && matrix.cpu == 'amd64'
-        run: |
-          sudo add-apt-repository universe
-          sudo apt update -qq
-          sudo apt install -y gcc-14 g++-14 libpcre3 liblapack-dev
-          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 60 --slave /usr/bin/g++ g++ /usr/bin/g++-14
-      - name: 'Install dependencies (macOS)'
-        if: runner.os == 'macOS'
-        run: brew install boehmgc make sfml gtk+3
-      - name: 'Install dependencies (Windows)'
-        if: runner.os == 'Windows'
-        shell: bash
-        run: |
-          set -e
-          . ci/funs.sh
-          nimInternalInstallDepsWindows
-          echo_run echo "${{ github.workspace }}/dist/mingw64/bin" >> "${GITHUB_PATH}"
-
-      - name: 'Add build binaries to PATH'
-        shell: bash
-        run: echo "${{ github.workspace }}/bin" >> "${GITHUB_PATH}"
-
-      - name: 'NIM_TESTAMENT_DISABLE_SSL'
-        shell: bash
-        run: echo "NIM_TESTAMENT_DISABLE_SSL=1" >> $GITHUB_ENV
-
-      - name: 'System information'
-        shell: bash
-        run: . ci/funs.sh && nimCiSystemInfo
-
-      - name: 'Build csourcesAny'
-        shell: bash
-        run: . ci/funs.sh && nimBuildCsourcesIfNeeded CC=gcc ucpu='${{ matrix.cpu }}'
-
-      - name: 'koch, Run CI'
-        shell: bash
-        run: . ci/funs.sh && nimInternalBuildKochAndRunCI

.github/workflows/ci_packages.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-20.04, macos-12]
+        os: [ubuntu-20.04, macos-11]
         cpu: [amd64]
         batch: ["allowed_failures", "0_3", "1_3", "2_3"] # list of `index_num`
     name: '${{ matrix.os }} (batch: ${{ matrix.batch }})'
@@ -28,14 +28,14 @@ jobs:
       NIM_TESTAMENT_BATCH: ${{ matrix.batch }}
     steps:
       - name: 'Checkout'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
         with:
           fetch-depth: 2
 
-      - name: 'Install node.js 20.x'
-        uses: actions/setup-node@v4
+      - name: 'Install node.js 16.x'
+        uses: actions/setup-node@v3
         with:
-          node-version: '20.x'
+          node-version: '16.x'
 
       - name: 'Install dependencies (Linux amd64)'
         if: runner.os == 'Linux' && matrix.cpu == 'amd64'

.github/workflows/ci_publish.yml

@@ -17,14 +17,14 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - name: 'Checkout'
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
         with:
           fetch-depth: 2
 
-      - name: 'Install node.js 20.x'
-        uses: actions/setup-node@v4
+      - name: 'Install node.js 16.x'
+        uses: actions/setup-node@v3
         with:
-          node-version: '20.x'
+          node-version: '16.x'
 
       - name: 'Install dependencies (Linux amd64)'
         if: runner.os == 'Linux' && matrix.cpu == 'amd64'
@@ -71,7 +71,7 @@ jobs:
         run: nim c -r -d:release ci/action.nim
 
       - name: 'Comment'
-        uses: actions/github-script@v7
+        uses: actions/github-script@v6
         with:
           script: |
             const fs = require('fs');

.github/workflows/stale.yml

@@ -9,7 +9,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v8
         with:
           days-before-pr-stale:    365
           days-before-pr-close:    30

azure-pipelines.yml

@@ -29,10 +29,10 @@ jobs:
 #         vmImage: 'ubuntu-18.04'
 #         CPU: i386
       OSX_amd64:
-        vmImage: 'macOS-12'
+        vmImage: 'macOS-11'
         CPU: amd64
       OSX_amd64_cpp:
-        vmImage: 'macOS-12'
+        vmImage: 'macOS-11'
         CPU: amd64
         NIM_COMPILE_TO_CPP: true
       Windows_amd64_batch0_3:
@@ -73,8 +73,8 @@ jobs:
 
     - task: NodeTool@0
       inputs:
-        versionSpec: '20.x'
-      displayName: 'Install node.js 20.x'
+        versionSpec: '16.x'
+      displayName: 'Install node.js 16.x'
       condition: and(succeeded(), eq(variables['skipci'], 'false'))
 
     - bash: |

changelog.md

@@ -3,216 +3,26 @@
 
 ## Changes affecting backward compatibility
 
-- `-d:nimStrictDelete` becomes the default. An index error is produced when the index passed to `system.delete` is out of bounds. Use `-d:nimAuditDelete` to mimic the old behavior for backward compatibility.
-- The default user-agent in `std/httpclient` has been changed to `Nim-httpclient/<version>` instead of `Nim httpclient/<version>` which was incorrect according to the HTTP spec.
-- Methods now support implementations based on a VTable by using `--experimental:vtables`. Methods are then confined to the same module where their type has been defined.
-- With `-d:nimPreviewNonVarDestructor`, non-var destructors become the default.
-- A bug where tuple unpacking assignment with a longer tuple on the RHS than the LHS was allowed has been fixed, i.e. code like:
-  ```nim
-  var a, b: int
-  (a, b) = (1, 2, 3, 4)
-  ```
-  will no longer compile.
-- `internalNew` is removed from the `system` module, use `new` instead.
-
-- `bindMethod` in `std/jsffi` is deprecated, don't use it with closures.
-
-- JS backend now supports lambda lifting for closures. Use `--legacy:jsNoLambdaLifting` to emulate old behaviors.
-
-- JS backend now supports closure iterators.
-
-- `owner` in `std/macros` is deprecated.
-
-- Ambiguous type symbols in generic procs and templates now generate symchoice nodes.
-  Previously; in templates they would error immediately at the template definition,
-  and in generic procs a type symbol would arbitrarily be captured, losing the
-  information of the other symbols. This means that generic code can now give
-  errors for ambiguous type symbols, and macros operating on generic proc AST
-  may encounter symchoice nodes instead of the arbitrarily resolved type symbol nodes.
-
-- Partial generic instantiation of routines is no longer allowed. Previously
-  it compiled in niche situations due to bugs in the compiler.
-
-  ```nim
-  proc foo[T, U](x: T, y: U) = echo (x, y)
-  proc foo[T, U](x: var T, y: U) = echo "var ", (x, y)
-
-  proc bar[T]() =
-    foo[float](1, "abc")
-
-  bar[int]() # before: (1.0, "abc"), now: type mismatch, missing generic parameter
-  ```
-
-- `const` values now open a new scope for each constant, meaning symbols
-  declared in them can no longer be used outside or in the value of
-  other constants.
-
-  ```nim
-  const foo = (var a = 1; a)
-  const bar = a # error
-  let baz = a # error
-  ```
-- The following POSIX wrappers have had their types changed from signed to
-  unsigned types on OSX and FreeBSD/OpenBSD to correct codegen errors:
-  - `Gid` (was `int32`, is now `uint32`)
-  - `Uid` (was `int32`, is now `uint32`)
-  - `Dev` (was `int32`, is now `uint32` on FreeBSD)
-  - `Nlink` (was `int16`, is now `uint32` on OpenBSD and `uint16` on OSX/other BSD)
-  - `sin6_flowinfo` and `sin6_scope_id` fields of `Sockaddr_in6`
-    (were `int32`, are now `uint32`)
-  - `n_net` field of `Tnetent` (was `int32`, is now `uint32`)
-
 
 ## Standard library additions and changes
 
 [//]: # "Changes:"
 
-- Changed `std/osfiles.copyFile` to allow specifying `bufferSize` instead of a hard-coded one.
-- Changed `std/osfiles.copyFile` to use `POSIX_FADV_SEQUENTIAL` hints for kernel-level aggressive sequential read-aheads.
-- `std/htmlparser` has been moved to a nimble package, use `nimble` or `atlas` to install it.
 
 [//]: # "Additions:"
 
-- Added `newStringUninit` to the `system` module, which creates a new string of length `len` like `newString` but with uninitialized content.
-- Added `setLenUninit` to the `system` module, which doesn't initialize
-slots when enlarging a sequence.
-- Added `hasDefaultValue` to `std/typetraits` to check if a type has a valid default value.
-- Added `rangeBase` to `std/typetraits` to obtain the base type of a range type or
-  convert a value with a range type to its base type.
-- Added Viewport API for the JavaScript targets in the `dom` module.
-- Added `toSinglyLinkedRing` and `toDoublyLinkedRing` to `std/lists` to convert from `openArray`s.
-- ORC: To be enabled via `nimOrcStats` there is a new API called `GC_orcStats` that can be used to query how many
-  objects the cyclic collector did free. If the number is zero that is a strong indicator that you can use `--mm:arc`
-  instead of `--mm:orc`.
-- A `$` template is provided for `Path` in `std/paths`.
-- `std/hashes.hash(x:string)` changed to produce a 64-bit string `Hash` (based
-on Google's Farm Hash) which is also often faster than the present one.  Define
-`nimStringHash2` to get the old values back.  `--jsbigint=off` mode always only
-produces the old values.  This may impact your automated tests if they depend
-on hash order in some obvious or indirect way.  Using `sorted` or `OrderedTable`
-is often an easy workaround.
-
 [//]: # "Deprecations:"
 
-- Deprecates `system.newSeqUninitialized`, which is replaced by `newSeqUninit`.
 
 [//]: # "Removals:"
 
 
 ## Language changes
 
-- `noInit` can be used in types and fields to disable member initializers in the C++ backend.
-- C++ custom constructors initializers see https://nim-lang.org/docs/manual_experimental.html#constructor-initializer
-- `member` can be used to attach a procedure to a C++ type.
-- C++ `constructor` now reuses `result` instead creating `this`.
 
-- Tuple unpacking changes:
-  - Tuple unpacking assignment now supports using underscores to discard values.
-    ```nim
-    var a, c: int
-    (a, _, c) = (1, 2, 3)
-    ```
-  - Tuple unpacking variable declarations now support type annotations, but
-    only for the entire tuple.
-    ```nim
-    let (a, b): (int, int) = (1, 2)
-    let (a, (b, c)): (byte, (float, cstring)) = (1, (2, "abc"))
-    ```
-
-- The experimental option `--experimental:openSym` has been added to allow
-  captured symbols in generic routine and template bodies respectively to be
-  replaced by symbols injected locally by templates/macros at instantiation
-  time. `bind` may be used to keep the captured symbols over the injected ones
-  regardless of enabling the option, but other methods like renaming the
-  captured symbols should be used instead so that the code is not affected by
-  context changes.
-
-  Since this change may affect runtime behavior, the experimental switch
-  `openSym` needs to be enabled; and a warning is given in the case where an
-  injected symbol would replace a captured symbol not bound by `bind` and
-  the experimental switch isn't enabled.
-
-  ```nim
-  const value = "captured"
-  template foo(x: int, body: untyped): untyped =
-    let value {.inject.} = "injected"
-    body
-
-  proc old[T](): string =
-    foo(123):
-      return value # warning: a new `value` has been injected, use `bind` or turn on `experimental:openSym`
-  echo old[int]() # "captured"
-
-  template oldTempl(): string =
-    block:
-      foo(123):
-        value # warning: a new `value` has been injected, use `bind` or turn on `experimental:openSym`
-  echo oldTempl() # "captured"
-
-  {.experimental: "openSym".}
-
-  proc bar[T](): string =
-    foo(123):
-      return value
-  assert bar[int]() == "injected" # previously it would be "captured"
-
-  proc baz[T](): string =
-    bind value
-    foo(123):
-      return value
-  assert baz[int]() == "captured"
-
-  template barTempl(): string =
-    block:
-      foo(123):
-        value
-  assert barTempl() == "injected" # previously it would be "captured"
-
-  template bazTempl(): string =
-    bind value
-    block:
-      foo(123):
-        value
-  assert bazTempl() == "captured"
-  ```
-
-  This option also generates a new node kind `nnkOpenSym` which contains
-  exactly 1 `nnkSym` node. In the future this might be merged with a slightly
-  modified `nnkOpenSymChoice` node but macros that want to support the
-  experimental feature should still handle `nnkOpenSym`, as the node kind would
-  simply not be generated as opposed to being removed.
-
-  Another experimental switch `genericsOpenSym` exists that enables this behavior
-  at instantiation time, meaning templates etc can enable it specifically when
-  they are being called. However this does not generate `nnkOpenSym` nodes
-  (unless the other switch is enabled) and so doesn't reflect the regular
-  behavior of the switch.
-
-  ```nim
-  const value = "captured"
-  template foo(x: int, body: untyped): untyped =
-    let value {.inject.} = "injected"
-    {.push experimental: "genericsOpenSym".}
-    body
-    {.pop.}
-
-  proc bar[T](): string =
-    foo(123):
-      return value
-  echo bar[int]() # "injected"
-
-  template barTempl(): string =
-    block:
-      var res: string
-      foo(123):
-        res = value
-      res
-  assert barTempl() == "injected"
-  ```
 
 ## Compiler changes
 
-- `--nimcache` using a relative path as the argument in a config file is now relative to the config file instead of the current directory.
 
 ## Tool changes
 

changelogs/changelog_2_0_0_details.md

@@ -72,7 +72,7 @@
 - `shallowCopy` and `shallow` are removed for ARC/ORC. Use `move` when possible or combine assignment and
 `sink` for optimization purposes.
 
-- The experimental `nimPreviewDotLikeOps` switch is going to be removed or deprecated because it didn't fulfill its promises.
+- The experimental `nimPreviewDotLikeOps` switch is going to be removed or deprecated because it didn't fullfill its promises.
 
 - The `{.this.}` pragma, deprecated since 0.19, has been removed.
 - `nil` literals can no longer be directly assigned to variables or fields of `distinct` pointer types. They must be converted instead.
@@ -205,7 +205,7 @@
   proc prc(): int =
     123
 
-  iterator iter(): int {.closure.} =
+  iterator iter(): int =
     yield 123
 
   proc takesProc[T: proc](x: T) = discard

compiler/aliases.nim

@@ -10,9 +10,7 @@
 ## Simple alias analysis for the HLO and the code generators.
 
 import
-  ast, astalgo, types, trees
-
-import std/intsets
+  ast, astalgo, types, trees, intsets
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -51,16 +49,14 @@ proc isPartOfAux(a, b: PType, marker: var IntSet): TAnalysisResult =
   if compareTypes(a, b, dcEqIgnoreDistinct): return arYes
   case a.kind
   of tyObject:
-    if a.baseClass != nil:
-      result = isPartOfAux(a.baseClass.skipTypes(skipPtrs), b, marker)
+    if a[0] != nil:
+      result = isPartOfAux(a[0].skipTypes(skipPtrs), b, marker)
     if result == arNo: result = isPartOfAux(a.n, b, marker)
   of tyGenericInst, tyDistinct, tyAlias, tySink:
-    result = isPartOfAux(skipModifier(a), b, marker)
-  of tySet, tyArray:
-    result = isPartOfAux(a.elementType, b, marker)
-  of tyTuple:
-    for aa in a.kids:
-      result = isPartOfAux(aa, b, marker)
+    result = isPartOfAux(lastSon(a), b, marker)
+  of tyArray, tySet, tyTuple:
+    for i in 0..<a.len:
+      result = isPartOfAux(a[i], b, marker)
       if result == arYes: return
   else: discard
 

compiler/astalgo.nim

@@ -12,18 +12,23 @@
 # the data structures here are used in various places of the compiler.
 
 import
-  ast, astyaml, options, lineinfos, idents, rodutils,
+  ast, hashes, intsets, options, lineinfos, ropes, idents, rodutils,
   msgs
 
-import std/[hashes, intsets]
-import std/strutils except addf
-
-export astyaml.treeToYaml, astyaml.typeToYaml, astyaml.symToYaml, astyaml.lineInfoToStr
+import strutils except addf
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
 
 proc hashNode*(p: RootRef): Hash
+proc treeToYaml*(conf: ConfigRef; n: PNode, indent: int = 0, maxRecDepth: int = - 1): Rope
+  # Convert a tree into its YAML representation; this is used by the
+  # YAML code generator and it is invaluable for debugging purposes.
+  # If maxRecDepht <> -1 then it won't print the whole graph.
+proc typeToYaml*(conf: ConfigRef; n: PType, indent: int = 0, maxRecDepth: int = - 1): Rope
+proc symToYaml*(conf: ConfigRef; n: PSym, indent: int = 0, maxRecDepth: int = - 1): Rope
+proc lineInfoToStr*(conf: ConfigRef; info: TLineInfo): Rope
+
 
 # these are for debugging only: They are not really deprecated, but I want
 # the warning so that release versions do not contain debugging statements:
@@ -31,6 +36,15 @@ proc debug*(n: PSym; conf: ConfigRef = nil) {.exportc: "debugSym", deprecated.}
 proc debug*(n: PType; conf: ConfigRef = nil) {.exportc: "debugType", deprecated.}
 proc debug*(n: PNode; conf: ConfigRef = nil) {.exportc: "debugNode", deprecated.}
 
+proc typekinds*(t: PType) {.deprecated.} =
+  var t = t
+  var s = ""
+  while t != nil and t.len > 0:
+    s.add $t.kind
+    s.add " "
+    t = t.lastSon
+  echo s
+
 template debug*(x: PSym|PType|PNode) {.deprecated.} =
   when compiles(c.config):
     debug(c.config, x)
@@ -65,6 +79,16 @@ template mdbg*: bool {.deprecated.} =
   else:
     error()
 
+# --------------------------- ident tables ----------------------------------
+proc idTableGet*(t: TIdTable, key: PIdObj): RootRef
+proc idTableGet*(t: TIdTable, key: int): RootRef
+proc idTablePut*(t: var TIdTable, key: PIdObj, val: RootRef)
+proc idTableHasObjectAsKey*(t: TIdTable, key: PIdObj): bool
+  # checks if `t` contains the `key` (compared by the pointer value, not only
+  # `key`'s id)
+proc idNodeTableGet*(t: TIdNodeTable, key: PIdObj): PNode
+proc idNodeTablePut*(t: var TIdNodeTable, key: PIdObj, val: PNode)
+
 # ---------------------------------------------------------------------------
 
 proc lookupInRecord*(n: PNode, field: PIdent): PSym
@@ -220,7 +244,171 @@ proc mustRehash(length, counter: int): bool =
   assert(length > counter)
   result = (length * 2 < counter * 3) or (length - counter < 4)
 
-import std/tables
+proc rspaces(x: int): Rope =
+  # returns x spaces
+  result = rope(spaces(x))
+
+proc toYamlChar(c: char): string =
+  case c
+  of '\0'..'\x1F', '\x7F'..'\xFF': result = "\\u" & strutils.toHex(ord(c), 4)
+  of '\'', '\"', '\\': result = '\\' & c
+  else: result = $c
+
+proc makeYamlString*(s: string): Rope =
+  # We have to split long strings into many ropes. Otherwise
+  # this could trigger InternalError(111). See the ropes module for
+  # further information.
+  const MaxLineLength = 64
+  result = ""
+  var res = "\""
+  for i in 0..<s.len:
+    if (i + 1) mod MaxLineLength == 0:
+      res.add('\"')
+      res.add("\n")
+      result.add(rope(res))
+      res = "\""              # reset
+    res.add(toYamlChar(s[i]))
+  res.add('\"')
+  result.add(rope(res))
+
+proc flagsToStr[T](flags: set[T]): Rope =
+  if flags == {}:
+    result = rope("[]")
+  else:
+    result = ""
+    for x in items(flags):
+      if result != "": result.add(", ")
+      result.add(makeYamlString($x))
+    result = "[" & result & "]"
+
+proc lineInfoToStr(conf: ConfigRef; info: TLineInfo): Rope =
+  result = "[$1, $2, $3]" % [makeYamlString(toFilename(conf, info)),
+                             rope(toLinenumber(info)),
+                             rope(toColumn(info))]
+
+proc treeToYamlAux(conf: ConfigRef; n: PNode, marker: var IntSet,
+                   indent, maxRecDepth: int): Rope
+proc symToYamlAux(conf: ConfigRef; n: PSym, marker: var IntSet,
+                  indent, maxRecDepth: int): Rope
+proc typeToYamlAux(conf: ConfigRef; n: PType, marker: var IntSet,
+                   indent, maxRecDepth: int): Rope
+
+proc symToYamlAux(conf: ConfigRef; n: PSym, marker: var IntSet, indent: int,
+                  maxRecDepth: int): Rope =
+  if n == nil:
+    result = rope("null")
+  elif containsOrIncl(marker, n.id):
+    result = "\"$1\"" % [rope(n.name.s)]
+  else:
+    var ast = treeToYamlAux(conf, n.ast, marker, indent + 2, maxRecDepth - 1)
+                                 #rope("typ"), typeToYamlAux(conf, n.typ, marker,
+                                 #  indent + 2, maxRecDepth - 1),
+    let istr = rspaces(indent + 2)
+    result = rope("{")
+    result.addf("$N$1\"kind\": $2", [istr, makeYamlString($n.kind)])
+    result.addf("$N$1\"name\": $2", [istr, makeYamlString(n.name.s)])
+    result.addf("$N$1\"typ\": $2", [istr, typeToYamlAux(conf, n.typ, marker, indent + 2, maxRecDepth - 1)])
+    if conf != nil:
+      # if we don't pass the config, we probably don't care about the line info
+      result.addf("$N$1\"info\": $2", [istr, lineInfoToStr(conf, n.info)])
+    if card(n.flags) > 0:
+      result.addf("$N$1\"flags\": $2", [istr, flagsToStr(n.flags)])
+    result.addf("$N$1\"magic\": $2", [istr, makeYamlString($n.magic)])
+    result.addf("$N$1\"ast\": $2", [istr, ast])
+    result.addf("$N$1\"options\": $2", [istr, flagsToStr(n.options)])
+    result.addf("$N$1\"position\": $2", [istr, rope(n.position)])
+    result.addf("$N$1\"k\": $2", [istr, makeYamlString($n.loc.k)])
+    result.addf("$N$1\"storage\": $2", [istr, makeYamlString($n.loc.storage)])
+    if card(n.loc.flags) > 0:
+      result.addf("$N$1\"flags\": $2", [istr, makeYamlString($n.loc.flags)])
+    result.addf("$N$1\"r\": $2", [istr, n.loc.r])
+    result.addf("$N$1\"lode\": $2", [istr, treeToYamlAux(conf, n.loc.lode, marker, indent + 2, maxRecDepth - 1)])
+    result.addf("$N$1}", [rspaces(indent)])
+
+proc typeToYamlAux(conf: ConfigRef; n: PType, marker: var IntSet, indent: int,
+                   maxRecDepth: int): Rope =
+  var sonsRope: Rope
+  if n == nil:
+    result = ""
+    sonsRope = rope("null")
+  elif containsOrIncl(marker, n.id):
+    result = ""
+    sonsRope = "\"$1 @$2\"" % [rope($n.kind), rope(
+        strutils.toHex(cast[int](n), sizeof(n) * 2))]
+  else:
+    if n.len > 0:
+      sonsRope = rope("[")
+      for i in 0..<n.len:
+        if i > 0: sonsRope.add(",")
+        sonsRope.addf("$N$1$2", [rspaces(indent + 4), typeToYamlAux(conf, n[i],
+            marker, indent + 4, maxRecDepth - 1)])
+      sonsRope.addf("$N$1]", [rspaces(indent + 2)])
+    else:
+      sonsRope = rope("null")
+
+    let istr = rspaces(indent + 2)
+    result = rope("{")
+    result.addf("$N$1\"kind\": $2", [istr, makeYamlString($n.kind)])
+    result.addf("$N$1\"sym\": $2",  [istr, symToYamlAux(conf, n.sym, marker, indent + 2, maxRecDepth - 1)])
+    result.addf("$N$1\"n\": $2",     [istr, treeToYamlAux(conf, n.n, marker, indent + 2, maxRecDepth - 1)])
+    if card(n.flags) > 0:
+      result.addf("$N$1\"flags\": $2", [istr, flagsToStr(n.flags)])
+    result.addf("$N$1\"callconv\": $2", [istr, makeYamlString($n.callConv)])
+    result.addf("$N$1\"size\": $2", [istr, rope(n.size)])
+    result.addf("$N$1\"align\": $2", [istr, rope(n.align)])
+    result.addf("$N$1\"sons\": $2", [istr, sonsRope])
+
+proc treeToYamlAux(conf: ConfigRef; n: PNode, marker: var IntSet, indent: int,
+                   maxRecDepth: int): Rope =
+  if n == nil:
+    result = rope("null")
+  else:
+    var istr = rspaces(indent + 2)
+    result = "{$N$1\"kind\": $2" % [istr, makeYamlString($n.kind)]
+    if maxRecDepth != 0:
+      if conf != nil:
+        result.addf(",$N$1\"info\": $2", [istr, lineInfoToStr(conf, n.info)])
+      case n.kind
+      of nkCharLit..nkInt64Lit:
+        result.addf(",$N$1\"intVal\": $2", [istr, rope(n.intVal)])
+      of nkFloatLit, nkFloat32Lit, nkFloat64Lit:
+        result.addf(",$N$1\"floatVal\": $2",
+            [istr, rope(n.floatVal.toStrMaxPrecision)])
+      of nkStrLit..nkTripleStrLit:
+        result.addf(",$N$1\"strVal\": $2", [istr, makeYamlString(n.strVal)])
+      of nkSym:
+        result.addf(",$N$1\"sym\": $2",
+             [istr, symToYamlAux(conf, n.sym, marker, indent + 2, maxRecDepth)])
+      of nkIdent:
+        if n.ident != nil:
+          result.addf(",$N$1\"ident\": $2", [istr, makeYamlString(n.ident.s)])
+        else:
+          result.addf(",$N$1\"ident\": null", [istr])
+      else:
+        if n.len > 0:
+          result.addf(",$N$1\"sons\": [", [istr])
+          for i in 0..<n.len:
+            if i > 0: result.add(",")
+            result.addf("$N$1$2", [rspaces(indent + 4), treeToYamlAux(conf, n[i],
+                marker, indent + 4, maxRecDepth - 1)])
+          result.addf("$N$1]", [istr])
+      result.addf(",$N$1\"typ\": $2",
+           [istr, typeToYamlAux(conf, n.typ, marker, indent + 2, maxRecDepth)])
+    result.addf("$N$1}", [rspaces(indent)])
+
+proc treeToYaml(conf: ConfigRef; n: PNode, indent: int = 0, maxRecDepth: int = - 1): Rope =
+  var marker = initIntSet()
+  result = treeToYamlAux(conf, n, marker, indent, maxRecDepth)
+
+proc typeToYaml(conf: ConfigRef; n: PType, indent: int = 0, maxRecDepth: int = - 1): Rope =
+  var marker = initIntSet()
+  result = typeToYamlAux(conf, n, marker, indent, maxRecDepth)
+
+proc symToYaml(conf: ConfigRef; n: PSym, indent: int = 0, maxRecDepth: int = - 1): Rope =
+  var marker = initIntSet()
+  result = symToYamlAux(conf, n, marker, indent, maxRecDepth)
+
+import tables
 
 const backrefStyle = "\e[90m"
 const enumStyle = "\e[34m"
@@ -384,12 +572,14 @@ proc value(this: var DebugPrinter; value: PType) =
     this.key "n"
     this.value value.n
 
-  this.key "sons"
-  this.openBracket
-  for i, a in value.ikids:
-    if i > 0: this.comma
-    this.value a
-  this.closeBracket
+  if value.len > 0:
+    this.key "sons"
+    this.openBracket
+    for i in 0..<value.len:
+      this.value value[i]
+      if i != value.len - 1:
+        this.comma
+    this.closeBracket
 
   if value.n != nil:
     this.key "n"
@@ -458,33 +648,30 @@ proc value(this: var DebugPrinter; value: PNode) =
 
 
 proc debug(n: PSym; conf: ConfigRef) =
-  var this = DebugPrinter(
-    visited: initTable[pointer, int](),
-    renderSymType: true,
-    useColor: not defined(windows)
-  )
+  var this: DebugPrinter
+  this.visited = initTable[pointer, int]()
+  this.renderSymType = true
+  this.useColor = not defined(windows)
   this.value(n)
   echo($this.res)
 
 proc debug(n: PType; conf: ConfigRef) =
-  var this = DebugPrinter(
-    visited: initTable[pointer, int](),
-    renderSymType: true,
-    useColor: not defined(windows)
-  )
+  var this: DebugPrinter
+  this.visited = initTable[pointer, int]()
+  this.renderSymType = true
+  this.useColor = not defined(windows)
   this.value(n)
   echo($this.res)
 
 proc debug(n: PNode; conf: ConfigRef) =
-  var this = DebugPrinter(
-    visited: initTable[pointer, int](),
-    renderSymType: false,
-    useColor: not defined(windows)
-  )
+  var this: DebugPrinter
+  this.visited = initTable[pointer, int]()
+  #this.renderSymType = true
+  this.useColor = not defined(windows)
   this.value(n)
   echo($this.res)
 
-proc nextTry(h, maxHash: Hash): Hash {.inline.} =
+proc nextTry(h, maxHash: Hash): Hash =
   result = ((5 * h) + 1) and maxHash
   # For any initial h in range(maxHash), repeating that maxHash times
   # generates each int in range(maxHash) exactly once (see any text on
@@ -707,12 +894,125 @@ proc initTabIter*(ti: var TTabIter, tab: TStrTable): PSym =
     result = nextIter(ti, tab)
 
 iterator items*(tab: TStrTable): PSym =
-  var it: TTabIter = default(TTabIter)
+  var it: TTabIter
   var s = initTabIter(it, tab)
   while s != nil:
     yield s
     s = nextIter(it, tab)
 
+proc hasEmptySlot(data: TIdPairSeq): bool =
+  for h in 0..high(data):
+    if data[h].key == nil:
+      return true
+  result = false
+
+proc idTableRawGet(t: TIdTable, key: int): int =
+  var h: Hash
+  h = key and high(t.data)    # start with real hash value
+  while t.data[h].key != nil:
+    if t.data[h].key.id == key:
+      return h
+    h = nextTry(h, high(t.data))
+  result = - 1
+
+proc idTableHasObjectAsKey(t: TIdTable, key: PIdObj): bool =
+  var index = idTableRawGet(t, key.id)
+  if index >= 0: result = t.data[index].key == key
+  else: result = false
+
+proc idTableGet(t: TIdTable, key: PIdObj): RootRef =
+  var index = idTableRawGet(t, key.id)
+  if index >= 0: result = t.data[index].val
+  else: result = nil
+
+proc idTableGet(t: TIdTable, key: int): RootRef =
+  var index = idTableRawGet(t, key)
+  if index >= 0: result = t.data[index].val
+  else: result = nil
+
+iterator pairs*(t: TIdTable): tuple[key: int, value: RootRef] =
+  for i in 0..high(t.data):
+    if t.data[i].key != nil:
+      yield (t.data[i].key.id, t.data[i].val)
+
+proc idTableRawInsert(data: var TIdPairSeq, key: PIdObj, val: RootRef) =
+  var h: Hash
+  h = key.id and high(data)
+  while data[h].key != nil:
+    assert(data[h].key.id != key.id)
+    h = nextTry(h, high(data))
+  assert(data[h].key == nil)
+  data[h].key = key
+  data[h].val = val
+
+proc idTablePut(t: var TIdTable, key: PIdObj, val: RootRef) =
+  var
+    index: int
+    n: TIdPairSeq
+  index = idTableRawGet(t, key.id)
+  if index >= 0:
+    assert(t.data[index].key != nil)
+    t.data[index].val = val
+  else:
+    if mustRehash(t.data.len, t.counter):
+      newSeq(n, t.data.len * GrowthFactor)
+      for i in 0..high(t.data):
+        if t.data[i].key != nil:
+          idTableRawInsert(n, t.data[i].key, t.data[i].val)
+      assert(hasEmptySlot(n))
+      swap(t.data, n)
+    idTableRawInsert(t.data, key, val)
+    inc(t.counter)
+
+iterator idTablePairs*(t: TIdTable): tuple[key: PIdObj, val: RootRef] =
+  for i in 0..high(t.data):
+    if not isNil(t.data[i].key): yield (t.data[i].key, t.data[i].val)
+
+proc idNodeTableRawGet(t: TIdNodeTable, key: PIdObj): int =
+  var h: Hash
+  h = key.id and high(t.data) # start with real hash value
+  while t.data[h].key != nil:
+    if t.data[h].key.id == key.id:
+      return h
+    h = nextTry(h, high(t.data))
+  result = - 1
+
+proc idNodeTableGet(t: TIdNodeTable, key: PIdObj): PNode =
+  var index: int
+  index = idNodeTableRawGet(t, key)
+  if index >= 0: result = t.data[index].val
+  else: result = nil
+
+proc idNodeTableRawInsert(data: var TIdNodePairSeq, key: PIdObj, val: PNode) =
+  var h: Hash
+  h = key.id and high(data)
+  while data[h].key != nil:
+    assert(data[h].key.id != key.id)
+    h = nextTry(h, high(data))
+  assert(data[h].key == nil)
+  data[h].key = key
+  data[h].val = val
+
+proc idNodeTablePut(t: var TIdNodeTable, key: PIdObj, val: PNode) =
+  var index = idNodeTableRawGet(t, key)
+  if index >= 0:
+    assert(t.data[index].key != nil)
+    t.data[index].val = val
+  else:
+    if mustRehash(t.data.len, t.counter):
+      var n: TIdNodePairSeq
+      newSeq(n, t.data.len * GrowthFactor)
+      for i in 0..high(t.data):
+        if t.data[i].key != nil:
+          idNodeTableRawInsert(n, t.data[i].key, t.data[i].val)
+      swap(t.data, n)
+    idNodeTableRawInsert(t.data, key, val)
+    inc(t.counter)
+
+iterator pairs*(t: TIdNodeTable): tuple[key: PIdObj, val: PNode] =
+  for i in 0..high(t.data):
+    if not isNil(t.data[i].key): yield (t.data[i].key, t.data[i].val)
+
 proc initIITable(x: var TIITable) =
   x.counter = 0
   newSeq(x.data, StartSize)
@@ -758,6 +1058,14 @@ proc iiTablePut(t: var TIITable, key, val: int) =
     iiTableRawInsert(t.data, key, val)
     inc(t.counter)
 
+proc isAddrNode*(n: PNode): bool =
+  case n.kind
+    of nkAddr, nkHiddenAddr: true
+    of nkCallKinds:
+      if n[0].kind == nkSym and n[0].sym.magic == mAddr: true
+      else: false
+    else: false
+
 proc listSymbolNames*(symbols: openArray[PSym]): string =
   result = ""
   for sym in symbols:

compiler/astmsgs.nim

@@ -5,7 +5,7 @@ import options, ast, msgs
 proc typSym*(t: PType): PSym =
   result = t.sym
   if result == nil and t.kind == tyGenericInst: # this might need to be refined
-    result = t.genericHead.sym
+    result = t[0].sym
 
 proc addDeclaredLoc*(result: var string, conf: ConfigRef; sym: PSym) =
   result.add " [$1 declared in $2]" % [sym.kind.toHumanStr, toFileLineCol(conf, sym.info)]
@@ -24,12 +24,6 @@ proc addDeclaredLoc*(result: var string, conf: ConfigRef; typ: PType) =
     result.add " declared in " & toFileLineCol(conf, typ.sym.info)
   result.add "]"
 
-proc addTypeNodeDeclaredLoc*(result: var string, conf: ConfigRef; typ: PType) =
-  result.add " [$1" % typ.kind.toHumanStr
-  if typ.sym != nil:
-    result.add " declared in " & toFileLineCol(conf, typ.sym.info)
-  result.add "]"
-
 proc addDeclaredLocMaybe*(result: var string, conf: ConfigRef; typ: PType) =
   if optDeclaredLocs in conf.globalOptions: addDeclaredLoc(result, conf, typ)
 

compiler/astyaml.nim

@@ -1,154 +0,0 @@
-#
-#
-#           The Nim Compiler
-#        (c) Copyright 2012 Andreas Rumpf
-#
-#    See the file "copying.txt", included in this
-#    distribution, for details about the copyright.
-#
-
-# AST YAML printing
-
-import "."/[ast, lineinfos, msgs, options, rodutils]
-import std/[intsets, strutils]
-
-proc addYamlString*(res: var string; s: string) =
-  res.add "\""
-  for c in s:
-    case c
-    of '\0' .. '\x1F', '\x7F' .. '\xFF':
-      res.add("\\u" & strutils.toHex(ord(c), 4))
-    of '\"', '\\':
-      res.add '\\' & c
-    else:
-      res.add c
-
-  res.add('\"')
-
-proc makeYamlString(s: string): string =
-  result = ""
-  result.addYamlString(s)
-
-proc flagsToStr[T](flags: set[T]): string =
-  if flags == {}:
-    result = "[]"
-  else:
-    result = ""
-    for x in items(flags):
-      if result != "":
-        result.add(", ")
-      result.addYamlString($x)
-    result = "[" & result & "]"
-
-proc lineInfoToStr*(conf: ConfigRef; info: TLineInfo): string =
-  result = "["
-  result.addYamlString(toFilename(conf, info))
-  result.addf ", $1, $2]", [toLinenumber(info), toColumn(info)]
-
-proc treeToYamlAux(res: var string; conf: ConfigRef; n: PNode; marker: var IntSet; indent, maxRecDepth: int)
-proc symToYamlAux(res: var string; conf: ConfigRef; n: PSym; marker: var IntSet; indent, maxRecDepth: int)
-proc typeToYamlAux(res: var string; conf: ConfigRef; n: PType; marker: var IntSet; indent, maxRecDepth: int)
-
-proc symToYamlAux(res: var string; conf: ConfigRef; n: PSym; marker: var IntSet; indent: int; maxRecDepth: int) =
-  if n == nil:
-    res.add("null")
-  elif containsOrIncl(marker, n.id):
-    res.addYamlString(n.name.s)
-  else:
-    let istr = spaces(indent * 4)
-
-    res.addf("kind: $1", [makeYamlString($n.kind)])
-    res.addf("\n$1name: $2", [istr, makeYamlString(n.name.s)])
-    res.addf("\n$1typ: ", [istr])
-    res.typeToYamlAux(conf, n.typ, marker, indent + 1, maxRecDepth - 1)
-    if conf != nil:
-      # if we don't pass the config, we probably don't care about the line info
-      res.addf("\n$1info: $2", [istr, lineInfoToStr(conf, n.info)])
-    if card(n.flags) > 0:
-      res.addf("\n$1flags: $2", [istr, flagsToStr(n.flags)])
-    res.addf("\n$1magic: $2", [istr, makeYamlString($n.magic)])
-    res.addf("\n$1ast: ", [istr])
-    res.treeToYamlAux(conf, n.ast, marker, indent + 1, maxRecDepth - 1)
-    res.addf("\n$1options: $2", [istr, flagsToStr(n.options)])
-    res.addf("\n$1position: $2", [istr, $n.position])
-    res.addf("\n$1k: $2", [istr, makeYamlString($n.loc.k)])
-    res.addf("\n$1storage: $2", [istr, makeYamlString($n.loc.storage)])
-    if card(n.loc.flags) > 0:
-      res.addf("\n$1flags: $2", [istr, makeYamlString($n.loc.flags)])
-    res.addf("\n$1snippet: $2", [istr, n.loc.snippet])
-    res.addf("\n$1lode: $2", [istr])
-    res.treeToYamlAux(conf, n.loc.lode, marker, indent + 1, maxRecDepth - 1)
-
-proc typeToYamlAux(res: var string; conf: ConfigRef; n: PType; marker: var IntSet; indent: int; maxRecDepth: int) =
-  if n == nil:
-    res.add("null")
-  elif containsOrIncl(marker, n.id):
-    res.addf "\"$1 @$2\"" % [$n.kind, strutils.toHex(cast[uint](n), sizeof(n) * 2)]
-  else:
-    let istr = spaces(indent * 4)
-    res.addf("kind: $2", [istr, makeYamlString($n.kind)])
-    res.addf("\n$1sym: ")
-    res.symToYamlAux(conf, n.sym, marker, indent + 1, maxRecDepth - 1)
-    res.addf("\n$1n: ")
-    res.treeToYamlAux(conf, n.n, marker, indent + 1, maxRecDepth - 1)
-    if card(n.flags) > 0:
-      res.addf("\n$1flags: $2", [istr, flagsToStr(n.flags)])
-    res.addf("\n$1callconv: $2", [istr, makeYamlString($n.callConv)])
-    res.addf("\n$1size: $2", [istr, $(n.size)])
-    res.addf("\n$1align: $2", [istr, $(n.align)])
-    if n.hasElementType:
-      res.addf("\n$1sons:")
-      for a in n.kids:
-        res.addf("\n  - ")
-        res.typeToYamlAux(conf, a, marker, indent + 1, maxRecDepth - 1)
-
-proc treeToYamlAux(res: var string; conf: ConfigRef; n: PNode; marker: var IntSet; indent: int;
-                   maxRecDepth: int) =
-  if n == nil:
-    res.add("null")
-  else:
-    var istr = spaces(indent * 4)
-    res.addf("kind: $1" % [makeYamlString($n.kind)])
-
-    if maxRecDepth != 0:
-      if conf != nil:
-        res.addf("\n$1info: $2", [istr, lineInfoToStr(conf, n.info)])
-      case n.kind
-      of nkCharLit .. nkInt64Lit:
-        res.addf("\n$1intVal: $2", [istr, $(n.intVal)])
-      of nkFloatLit, nkFloat32Lit, nkFloat64Lit:
-        res.addf("\n$1floatVal: $2", [istr, n.floatVal.toStrMaxPrecision])
-      of nkStrLit .. nkTripleStrLit:
-        res.addf("\n$1strVal: $2", [istr, makeYamlString(n.strVal)])
-      of nkSym:
-        res.addf("\n$1sym: ", [istr])
-        res.symToYamlAux(conf, n.sym, marker, indent + 1, maxRecDepth)
-      of nkIdent:
-        if n.ident != nil:
-          res.addf("\n$1ident: $2", [istr, makeYamlString(n.ident.s)])
-        else:
-          res.addf("\n$1ident: null", [istr])
-      else:
-        if n.len > 0:
-          res.addf("\n$1sons: ", [istr])
-          for i in 0 ..< n.len:
-            res.addf("\n$1  - ", [istr])
-            res.treeToYamlAux(conf, n[i], marker, indent + 1, maxRecDepth - 1)
-      if n.typ != nil:
-        res.addf("\n$1typ: ", [istr])
-        res.typeToYamlAux(conf, n.typ, marker, indent + 1, maxRecDepth)
-
-proc treeToYaml*(conf: ConfigRef; n: PNode; indent: int = 0; maxRecDepth: int = -1): string =
-  var marker = initIntSet()
-  result = newStringOfCap(1024)
-  result.treeToYamlAux(conf, n, marker, indent, maxRecDepth)
-
-proc typeToYaml*(conf: ConfigRef; n: PType; indent: int = 0; maxRecDepth: int = -1): string =
-  var marker = initIntSet()
-  result = newStringOfCap(1024)
-  result.typeToYamlAux(conf, n, marker, indent, maxRecDepth)
-
-proc symToYaml*(conf: ConfigRef; n: PSym; indent: int = 0; maxRecDepth: int = -1): string =
-  var marker = initIntSet()
-  result = newStringOfCap(1024)
-  result.symToYamlAux(conf, n, marker, indent, maxRecDepth)

compiler/backendpragmas.nim

@@ -0,0 +1,25 @@
+import pragmas, options, ast, trees
+
+proc pushBackendOption(optionsStack: var seq[TOptions], options: var TOptions) =
+  optionsStack.add options
+
+proc popBackendOption(optionsStack: var seq[TOptions], options: var TOptions) =
+  options = optionsStack[^1]
+  optionsStack.setLen(optionsStack.len-1)
+
+proc processPushBackendOption*(optionsStack: var seq[TOptions], options: var TOptions,
+                           n: PNode, start: int) =
+  pushBackendOption(optionsStack, options)
+  for i in start..<n.len:
+    let it = n[i]
+    if it.kind in nkPragmaCallKinds and it.len == 2 and it[1].kind == nkIntLit:
+      let sw = whichPragma(it[0])
+      let opts = pragmaToOptions(sw)
+      if opts != {}:
+        if it[1].intVal != 0:
+          options.incl opts
+        else:
+          options.excl opts
+
+template processPopBackendOption*(optionsStack: var seq[TOptions], options: var TOptions) =
+  popBackendOption(optionsStack, options)

compiler/bitsets.nim

@@ -90,8 +90,3 @@ proc bitSetCard*(x: TBitSet): BiggestInt =
   result = 0
   for it in x:
     result.inc int(populationCount[it])
-
-proc bitSetToWord*(s: TBitSet; size: int): BiggestUInt =
-  result = 0
-  for j in 0..<size:
-    if j < s.len: result = result or (BiggestUInt(s[j]) shl (j * 8))

compiler/cbuilder.nim

@@ -1,121 +0,0 @@
-type
-  Snippet = string
-  Builder = string
-
-template newBuilder(s: string): Builder =
-  s
-
-proc addField(obj: var Builder; name, typ: Snippet) =
-  obj.add('\t')
-  obj.add(typ)
-  obj.add(" ")
-  obj.add(name)
-  obj.add(";\n")
-
-proc addField(obj: var Builder; field: PSym; name, typ: Snippet; isFlexArray: bool; initializer: Snippet) =
-  obj.add('\t')
-  if field.alignment > 0:
-    obj.add("NIM_ALIGN(")
-    obj.addInt(field.alignment)
-    obj.add(") ")
-  obj.add(typ)
-  if sfNoalias in field.flags:
-    obj.add(" NIM_NOALIAS")
-  obj.add(" ")
-  obj.add(name)
-  if isFlexArray:
-    obj.add("[SEQ_DECL_SIZE]")
-  if field.bitsize != 0:
-    obj.add(":")
-    obj.addInt(field.bitsize)
-  if initializer.len != 0:
-    obj.add(initializer)
-  obj.add(";\n")
-
-proc structOrUnion(t: PType): Snippet =
-  let t = t.skipTypes({tyAlias, tySink})
-  if tfUnion in t.flags: "union"
-  else: "struct"
-
-proc ptrType(t: Snippet): Snippet =
-  t & "*"
-
-template addStruct(obj: var Builder; m: BModule; typ: PType; name: string; baseType: string; body: typed) =
-  if tfPacked in typ.flags:
-    if hasAttribute in CC[m.config.cCompiler].props:
-      obj.add(structOrUnion(typ))
-      obj.add(" __attribute__((__packed__))")
-    else:
-      obj.add("#pragma pack(push, 1)\n")
-      obj.add(structOrUnion(typ))
-  else:
-    obj.add(structOrUnion(typ))
-  obj.add(" ")
-  obj.add(name)
-  type BaseClassKind = enum
-    bcNone, bcCppInherit, bcSupField, bcNoneRtti, bcNoneTinyRtti
-  var baseKind = bcNone
-  if typ.kind == tyObject:
-    if typ.baseClass == nil:
-      if lacksMTypeField(typ):
-        baseKind = bcNone
-      elif optTinyRtti in m.config.globalOptions:
-        baseKind = bcNoneTinyRtti
-      else:
-        baseKind = bcNoneRtti
-    elif m.compileToCpp:
-      baseKind = bcCppInherit
-    else:
-      baseKind = bcSupField
-  if baseKind == bcCppInherit:
-    obj.add(" : public ")
-    obj.add(baseType)
-  obj.add(" ")
-  obj.add("{\n")
-  let currLen = obj.len
-  case baseKind
-  of bcNone:
-    # rest of the options add a field or don't need it due to inheritance,
-    # we need to add the dummy field for uncheckedarray ahead of time
-    # so that it remains trailing
-    if typ.itemId notin m.g.graph.memberProcsPerType and
-        typ.n != nil and typ.n.len == 1 and typ.n[0].kind == nkSym and
-        typ.n[0].sym.typ.skipTypes(abstractInst).kind == tyUncheckedArray:
-      # only consists of flexible array field, add *initial* dummy field
-      obj.addField(name = "dummy", typ = "char")
-  of bcCppInherit: discard
-  of bcNoneRtti:
-    obj.addField(name = "m_type", typ = ptrType(cgsymValue(m, "TNimType")))
-  of bcNoneTinyRtti:
-    obj.addField(name = "m_type", typ = ptrType(cgsymValue(m, "TNimTypeV2")))
-  of bcSupField:
-    obj.addField(name = "Sup", typ = baseType)
-  body
-  if baseKind == bcNone and currLen == obj.len and typ.itemId notin m.g.graph.memberProcsPerType:
-    # no fields were added, add dummy field
-    obj.addField(name = "dummy", typ = "char")
-  obj.add("};\n")
-  if tfPacked in typ.flags and hasAttribute notin CC[m.config.cCompiler].props:
-    result.add("#pragma pack(pop)\n")
-
-template addFieldWithStructType(obj: var Builder; m: BModule; parentTyp: PType; fieldName: string, body: typed) =
-  ## adds a field with a `struct { ... }` type, building it according to `body`
-  obj.add('\t')
-  if tfPacked in parentTyp.flags:
-    if hasAttribute in CC[m.config.cCompiler].props:
-      obj.add("struct __attribute__((__packed__)) {\n")
-    else:
-      obj.add("#pragma pack(push, 1)\nstruct {")
-  else:
-    obj.add("struct {\n")
-  body
-  obj.add("} ")
-  obj.add(fieldName)
-  obj.add(";\n")
-  if tfPacked in parentTyp.flags and hasAttribute notin CC[m.config.cCompiler].props:
-    result.add("#pragma pack(pop)\n")
-
-template addAnonUnion(obj: var Builder; body: typed) =
-  obj.add "union{\n"
-  body
-  obj.add("};\n")

compiler/ccgcalls.nim

@@ -24,7 +24,6 @@ proc canRaiseDisp(p: BProc; n: PNode): bool =
 
 proc preventNrvo(p: BProc; dest, le, ri: PNode): bool =
   proc locationEscapes(p: BProc; le: PNode; inTryStmt: bool): bool =
-    result = false
     var n = le
     while true:
       # do NOT follow nkHiddenDeref here!
@@ -76,23 +75,6 @@ proc isHarmlessStore(p: BProc; canRaise: bool; d: TLoc): bool =
   else:
     result = false
 
-proc cleanupTemp(p: BProc; returnType: PType, tmp: TLoc): bool =
-  if returnType.kind in {tyVar, tyLent}:
-    # we don't need to worry about var/lent return types
-    result = false
-  elif hasDestructor(returnType) and getAttachedOp(p.module.g.graph, returnType, attachedDestructor) != nil:
-    let dtor = getAttachedOp(p.module.g.graph, returnType, attachedDestructor)
-    var op = initLocExpr(p, newSymNode(dtor))
-    var callee = rdLoc(op)
-    let destroy = if dtor.typ.firstParamType.kind == tyVar:
-        callee & "(&" & rdLoc(tmp) & ")"
-      else:
-        callee & "(" & rdLoc(tmp) & ")"
-    raiseExitCleanup(p, destroy)
-    result = true
-  else:
-    result = false
-
 proc fixupCall(p: BProc, le, ri: PNode, d: var TLoc,
                callee, params: Rope) =
   let canRaise = p.config.exc == excGoto and canRaiseDisp(p, ri[0])
@@ -100,17 +82,13 @@ proc fixupCall(p: BProc, le, ri: PNode, d: var TLoc,
   var pl = callee & "(" & params
   # getUniqueType() is too expensive here:
   var typ = skipTypes(ri[0].typ, abstractInst)
-  if typ.returnType != nil:
-    var flags: TAssignmentFlags = {}
-    if typ.returnType.kind in {tyOpenArray, tyVarargs}:
-      # perhaps generate no temp if the call doesn't have side effects
-      flags.incl needTempForOpenArray
+  if typ[0] != nil:
     if isInvalidReturnType(p.config, typ):
       if params.len != 0: pl.add(", ")
       # beware of 'result = p(result)'. We may need to allocate a temporary:
       if d.k in {locTemp, locNone} or not preventNrvo(p, d.lode, le, ri):
         # Great, we can use 'd':
-        if d.k == locNone: d = getTemp(p, typ.returnType, needsInit=true)
+        if d.k == locNone: d = getTemp(p, typ[0], needsInit=true)
         elif d.k notin {locTemp} and not hasNoInit(ri):
           # reset before pass as 'result' var:
           discard "resetLoc(p, d)"
@@ -118,7 +96,7 @@ proc fixupCall(p: BProc, le, ri: PNode, d: var TLoc,
         pl.add(");\n")
         line(p, cpsStmts, pl)
       else:
-        var tmp: TLoc = getTemp(p, typ.returnType, needsInit=true)
+        var tmp: TLoc = getTemp(p, typ[0], needsInit=true)
         pl.add(addrLoc(p.config, tmp))
         pl.add(");\n")
         line(p, cpsStmts, pl)
@@ -132,56 +110,43 @@ proc fixupCall(p: BProc, le, ri: PNode, d: var TLoc,
           # with them to prevent undefined behaviour and because the codegen
           # is free to emit expressions multiple times!
           d.k = locCall
-          d.snippet = pl
+          d.r = pl
           excl d.flags, lfSingleUse
         else:
           if d.k == locNone and p.splitDecls == 0:
-            d = getTempCpp(p, typ.returnType, pl)
+            d = getTempCpp(p, typ[0], pl)
           else:
-            if d.k == locNone: d = getTemp(p, typ.returnType)
+            if d.k == locNone: d = getTemp(p, typ[0])
             var list = initLoc(locCall, d.lode, OnUnknown)
-            list.snippet = pl
-            genAssignment(p, d, list, {needAssignCall}) # no need for deep copying
+            list.r = pl
+            genAssignment(p, d, list, {}) # no need for deep copying
             if canRaise: raiseExit(p)
 
       elif isHarmlessStore(p, canRaise, d):
-        var useTemp = false
-        if d.k == locNone:
-          useTemp = true
-          d = getTemp(p, typ.returnType)
+        if d.k == locNone: d = getTemp(p, typ[0])
         assert(d.t != nil)        # generate an assignment to d:
         var list = initLoc(locCall, d.lode, OnUnknown)
-        list.snippet = pl
-        genAssignment(p, d, list, flags+{needAssignCall}) # no need for deep copying
-        if canRaise:
-          if not (useTemp and cleanupTemp(p, typ.returnType, d)):
-            raiseExit(p)
+        list.r = pl
+        genAssignment(p, d, list, {}) # no need for deep copying
+        if canRaise: raiseExit(p)
       else:
-        var tmp: TLoc = getTemp(p, typ.returnType, needsInit=true)
+        var tmp: TLoc = getTemp(p, typ[0], needsInit=true)
         var list = initLoc(locCall, d.lode, OnUnknown)
-        list.snippet = pl
-        genAssignment(p, tmp, list, flags+{needAssignCall}) # no need for deep copying
-        if canRaise:
-          if not cleanupTemp(p, typ.returnType, tmp):
-            raiseExit(p)
+        list.r = pl
+        genAssignment(p, tmp, list, {}) # no need for deep copying
+        if canRaise: raiseExit(p)
         genAssignment(p, d, tmp, {})
   else:
     pl.add(");\n")
     line(p, cpsStmts, pl)
     if canRaise: raiseExit(p)
 
-proc genBoundsCheck(p: BProc; arr, a, b: TLoc; arrTyp: PType)
+proc genBoundsCheck(p: BProc; arr, a, b: TLoc)
 
 proc reifiedOpenArray(n: PNode): bool {.inline.} =
   var x = n
-  while true:
-    case x.kind
-    of {nkAddr, nkHiddenAddr, nkHiddenDeref}:
-      x = x[0]
-    of nkHiddenStdConv:
-      x = x[1]
-    else:
-      break
+  while x.kind in {nkAddr, nkHiddenAddr, nkHiddenStdConv, nkHiddenDeref}:
+    x = x[0]
   if x.kind == nkSym and x.sym.kind == skParam:
     result = false
   else:
@@ -191,15 +156,12 @@ proc genOpenArraySlice(p: BProc; q: PNode; formalType, destType: PType; prepareF
   var a = initLocExpr(p, q[1])
   var b = initLocExpr(p, q[2])
   var c = initLocExpr(p, q[3])
-  # bug #23321: In the function mapType, ptrs (tyPtr, tyVar, tyLent, tyRef)
-  # are mapped into ctPtrToArray, the dereference of which is skipped
-  # in the `genDeref`. We need to skip these ptrs here
-  let ty = skipTypes(a.t, abstractVar+{tyPtr, tyRef})
   # but first produce the required index checks:
   if optBoundsCheck in p.options:
-    genBoundsCheck(p, a, b, c, ty)
+    genBoundsCheck(p, a, b, c)
   if prepareForMutation:
     linefmt(p, cpsStmts, "#nimPrepareStrMutationV2($1);$n", [byRefLoc(p, a)])
+  let ty = skipTypes(a.t, abstractVar+{tyPtr})
   let dest = getTypeDesc(p.module, destType)
   let lengthExpr = "($1)-($2)+1" % [rdLoc(c), rdLoc(b)]
   case ty.kind
@@ -255,10 +217,10 @@ proc openArrayLoc(p: BProc, formalType: PType, n: PNode; result: var Rope) =
         for i in 0..<q.len-1:
           genStmts(p, q[i])
         q = q.lastSon
-    let (x, y) = genOpenArraySlice(p, q, formalType, n.typ.elementType)
+    let (x, y) = genOpenArraySlice(p, q, formalType, n.typ[0])
     result.add x & ", " & y
   else:
-    var a = initLocExpr(p, if n.kind == nkHiddenStdConv: n[1] else: n)
+    var a: TLoc = initLocExpr(p, if n.kind == nkHiddenStdConv: n[1] else: n)
     case skipTypes(a.t, abstractVar+{tyStatic}).kind
     of tyOpenArray, tyVarargs:
       if reifiedOpenArray(n):
@@ -274,7 +236,8 @@ proc openArrayLoc(p: BProc, formalType: PType, n: PNode; result: var Rope) =
           optSeqDestructors in p.config.globalOptions:
         linefmt(p, cpsStmts, "#nimPrepareStrMutationV2($1);$n", [byRefLoc(p, a)])
       if ntyp.kind in {tyVar} and not compileToCpp(p.module):
-        var t = TLoc(snippet: "(*$1)" % [a.rdLoc])
+        var t: TLoc
+        t.r = "(*$1)" % [a.rdLoc]
         result.add "($4) ? ((*$1)$3) : NIM_NIL, $2" %
                      [a.rdLoc, lenExpr(p, t), dataField(p),
                       dataFieldAccessor(p, "*" & a.rdLoc)]
@@ -284,14 +247,15 @@ proc openArrayLoc(p: BProc, formalType: PType, n: PNode; result: var Rope) =
     of tyArray:
       result.add "$1, $2" % [rdLoc(a), rope(lengthOrd(p.config, a.t))]
     of tyPtr, tyRef:
-      case elementType(a.t).kind
+      case lastSon(a.t).kind
       of tyString, tySequence:
-        var t = TLoc(snippet: "(*$1)" % [a.rdLoc])
+        var t: TLoc
+        t.r = "(*$1)" % [a.rdLoc]
         result.add "($4) ? ((*$1)$3) : NIM_NIL, $2" %
                      [a.rdLoc, lenExpr(p, t), dataField(p),
                       dataFieldAccessor(p, "*" & a.rdLoc)]
       of tyArray:
-        result.add "$1, $2" % [rdLoc(a), rope(lengthOrd(p.config, elementType(a.t)))]
+        result.add "$1, $2" % [rdLoc(a), rope(lengthOrd(p.config, lastSon(a.t)))]
       else:
         internalError(p.config, "openArrayLoc: " & typeToString(a.t))
     else: internalError(p.config, "openArrayLoc: " & typeToString(a.t))
@@ -312,7 +276,7 @@ proc literalsNeedsTmp(p: BProc, a: TLoc): TLoc =
   genAssignment(p, result, a, {})
 
 proc genArgStringToCString(p: BProc, n: PNode; result: var Rope; needsTmp: bool) {.inline.} =
-  var a = initLocExpr(p, n[0])
+  var a: TLoc = initLocExpr(p, n[0])
   appcg(p.module, result, "#nimToCStringConv($1)", [withTmpIfNeeded(p, a, needsTmp).rdLoc])
 
 proc genArg(p: BProc, n: PNode, param: PSym; call: PNode; result: var Rope; needsTmp = false) =
@@ -322,7 +286,7 @@ proc genArg(p: BProc, n: PNode, param: PSym; call: PNode; result: var Rope; need
   elif skipTypes(param.typ, abstractVar).kind in {tyOpenArray, tyVarargs}:
     var n = if n.kind != nkHiddenAddr: n else: n[0]
     openArrayLoc(p, param.typ, n, result)
-  elif ccgIntroducedPtr(p.config, param, call[0].typ.returnType) and
+  elif ccgIntroducedPtr(p.config, param, call[0].typ[0]) and 
     (optByRef notin param.options or not p.module.compileToCpp):
     a = initLocExpr(p, n)
     if n.kind in {nkCharLit..nkNilLit}:
@@ -331,33 +295,18 @@ proc genArg(p: BProc, n: PNode, param: PSym; call: PNode; result: var Rope; need
       addAddrLoc(p.config, withTmpIfNeeded(p, a, needsTmp), result)
   elif p.module.compileToCpp and param.typ.kind in {tyVar} and
       n.kind == nkHiddenAddr:
-    # bug #23748: we need to introduce a temporary here. The expression type
-    # will be a reference in C++ and we cannot create a temporary reference
-    # variable. Thus, we create a temporary pointer variable instead.
-    let needsIndirect = mapType(p.config, n[0].typ, mapTypeChooser(n[0]) == skParam) != ctArray
-    if needsIndirect:
-      n.typ = n.typ.exactReplica
-      n.typ.flags.incl tfVarIsPtr
-    a = initLocExprSingleUse(p, n)
-    a = withTmpIfNeeded(p, a, needsTmp)
-    if needsIndirect: a.flags.incl lfIndirect
+    a = initLocExprSingleUse(p, n[0])
     # if the proc is 'importc'ed but not 'importcpp'ed then 'var T' still
     # means '*T'. See posix.nim for lots of examples that do that in the wild.
     let callee = call[0]
     if callee.kind == nkSym and
         {sfImportc, sfInfixCall, sfCompilerProc} * callee.sym.flags == {sfImportc} and
-        {lfHeader, lfNoDecl} * callee.sym.loc.flags != {} and
-        needsIndirect:
+        {lfHeader, lfNoDecl} * callee.sym.loc.flags != {}:
       addAddrLoc(p.config, a, result)
     else:
       addRdLoc(a, result)
   else:
     a = initLocExprSingleUse(p, n)
-    if param.typ.kind in {tyVar, tyPtr, tyRef, tySink}:
-      let typ = skipTypes(param.typ, abstractPtrs)
-      if not sameBackendTypePickyAliases(typ, n.typ.skipTypes(abstractPtrs)):
-        a.snippet = "(($1) ($2))" %
-          [getTypeDesc(p.module, param.typ), rdCharLoc(a)]
     addRdLoc(withTmpIfNeeded(p, a, needsTmp), result)
   #assert result != nil
 
@@ -402,7 +351,7 @@ proc getPotentialWrites(n: PNode; mutate: bool; result: var seq[PNode]) =
   of nkCallKinds:
     case n.getMagic:
     of mIncl, mExcl, mInc, mDec, mAppendStrCh, mAppendStrStr, mAppendSeqElem,
-        mAddr, mNew, mNewFinalize, mWasMoved, mDestroy:
+        mAddr, mNew, mNewFinalize, mWasMoved, mDestroy, mReset:
       getPotentialWrites(n[1], true, result)
       for i in 2..<n.len:
         getPotentialWrites(n[i], mutate, result)
@@ -440,15 +389,13 @@ proc genParams(p: BProc, ri: PNode, typ: PType; result: var Rope) =
         if not needTmp[i - 1]:
           needTmp[i - 1] = potentialAlias(n, potentialWrites)
       getPotentialWrites(ri[i], false, potentialWrites)
-    when false:
-      # this optimization is wrong, see bug #23748
-      if ri[i].kind in {nkHiddenAddr, nkAddr}:
-        # Optimization: don't use a temp, if we would only take the address anyway
-        needTmp[i - 1] = false
+    if ri[i].kind in {nkHiddenAddr, nkAddr}:
+      # Optimization: don't use a temp, if we would only take the address anyway
+      needTmp[i - 1] = false
 
   var oldLen = result.len
   for i in 1..<ri.len:
-    if i < typ.n.len:
+    if i < typ.len:
       assert(typ.n[i].kind == nkSym)
       let paramType = typ.n[i]
       if not paramType.typ.isCompileTimeOnly:
@@ -469,10 +416,11 @@ proc addActualSuffixForHCR(res: var Rope, module: PSym, sym: PSym) =
 
 proc genPrefixCall(p: BProc, le, ri: PNode, d: var TLoc) =
   # this is a hotspot in the compiler
-  var op = initLocExpr(p, ri[0])
+  var op: TLoc = initLocExpr(p, ri[0])
   # getUniqueType() is too expensive here:
   var typ = skipTypes(ri[0].typ, abstractInstOwned)
   assert(typ.kind == tyProc)
+  assert(typ.len == typ.n.len)
 
   var params = newRopeAppender()
   genParams(p, ri, typ, params)
@@ -490,11 +438,12 @@ proc genClosureCall(p: BProc, le, ri: PNode, d: var TLoc) =
   const PatProc = "$1.ClE_0? $1.ClP_0($3$1.ClE_0):(($4)($1.ClP_0))($2)"
   const PatIter = "$1.ClP_0($3$1.ClE_0)" # we know the env exists
 
-  var op = initLocExpr(p, ri[0])
+  var op: TLoc = initLocExpr(p, ri[0])
 
   # getUniqueType() is too expensive here:
   var typ = skipTypes(ri[0].typ, abstractInstOwned)
   assert(typ.kind == tyProc)
+  assert(typ.len == typ.n.len)
 
   var pl = newRopeAppender()
   genParams(p, ri, typ, pl)
@@ -507,14 +456,14 @@ proc genClosureCall(p: BProc, le, ri: PNode, d: var TLoc) =
 
   let rawProc = getClosureType(p.module, typ, clHalf)
   let canRaise = p.config.exc == excGoto and canRaiseDisp(p, ri[0])
-  if typ.returnType != nil:
+  if typ[0] != nil:
     if isInvalidReturnType(p.config, typ):
       if ri.len > 1: pl.add(", ")
       # beware of 'result = p(result)'. We may need to allocate a temporary:
       if d.k in {locTemp, locNone} or not preventNrvo(p, d.lode, le, ri):
         # Great, we can use 'd':
         if d.k == locNone:
-          d = getTemp(p, typ.returnType, needsInit=true)
+          d = getTemp(p, typ[0], needsInit=true)
         elif d.k notin {locTemp} and not hasNoInit(ri):
           # reset before pass as 'result' var:
           discard "resetLoc(p, d)"
@@ -522,29 +471,29 @@ proc genClosureCall(p: BProc, le, ri: PNode, d: var TLoc) =
         genCallPattern()
         if canRaise: raiseExit(p)
       else:
-        var tmp: TLoc = getTemp(p, typ.returnType, needsInit=true)
+        var tmp: TLoc = getTemp(p, typ[0], needsInit=true)
         pl.add(addrLoc(p.config, tmp))
         genCallPattern()
         if canRaise: raiseExit(p)
         genAssignment(p, d, tmp, {}) # no need for deep copying
     elif isHarmlessStore(p, canRaise, d):
-      if d.k == locNone: d = getTemp(p, typ.returnType)
+      if d.k == locNone: d = getTemp(p, typ[0])
       assert(d.t != nil)        # generate an assignment to d:
       var list: TLoc = initLoc(locCall, d.lode, OnUnknown)
       if tfIterator in typ.flags:
-        list.snippet = PatIter % [rdLoc(op), pl, pl.addComma, rawProc]
+        list.r = PatIter % [rdLoc(op), pl, pl.addComma, rawProc]
       else:
-        list.snippet = PatProc % [rdLoc(op), pl, pl.addComma, rawProc]
+        list.r = PatProc % [rdLoc(op), pl, pl.addComma, rawProc]
       genAssignment(p, d, list, {}) # no need for deep copying
       if canRaise: raiseExit(p)
     else:
-      var tmp: TLoc = getTemp(p, typ.returnType)
+      var tmp: TLoc = getTemp(p, typ[0])
       assert(d.t != nil)        # generate an assignment to d:
       var list: TLoc = initLoc(locCall, d.lode, OnUnknown)
       if tfIterator in typ.flags:
-        list.snippet = PatIter % [rdLoc(op), pl, pl.addComma, rawProc]
+        list.r = PatIter % [rdLoc(op), pl, pl.addComma, rawProc]
       else:
-        list.snippet = PatProc % [rdLoc(op), pl, pl.addComma, rawProc]
+        list.r = PatProc % [rdLoc(op), pl, pl.addComma, rawProc]
       genAssignment(p, tmp, list, {})
       if canRaise: raiseExit(p)
       genAssignment(p, d, tmp, {})
@@ -554,14 +503,14 @@ proc genClosureCall(p: BProc, le, ri: PNode, d: var TLoc) =
 
 proc genOtherArg(p: BProc; ri: PNode; i: int; typ: PType; result: var Rope;
                  argsCounter: var int) =
-  if i < typ.n.len:
+  if i < typ.len:
     # 'var T' is 'T&' in C++. This means we ignore the request of
     # any nkHiddenAddr when it's a 'var T'.
     let paramType = typ.n[i]
     assert(paramType.kind == nkSym)
     if paramType.typ.isCompileTimeOnly:
       discard
-    elif paramType.typ.kind in {tyVar} and ri[i].kind == nkHiddenAddr:
+    elif typ[i].kind in {tyVar} and ri[i].kind == nkHiddenAddr:
       if argsCounter > 0: result.add ", "
       genArgNoParam(p, ri[i][0], result)
       inc argsCounter
@@ -636,7 +585,7 @@ proc genThisArg(p: BProc; ri: PNode; i: int; typ: PType; result: var Rope) =
   # for better or worse c2nim translates the 'this' argument to a 'var T'.
   # However manual wrappers may also use 'ptr T'. In any case we support both
   # for convenience.
-  internalAssert p.config, i < typ.n.len
+  internalAssert p.config, i < typ.len
   assert(typ.n[i].kind == nkSym)
   # if the parameter is lying (tyVar) and thus we required an additional deref,
   # skip the deref:
@@ -722,31 +671,32 @@ proc genPatternCall(p: BProc; ri: PNode; pat: string; typ: PType; result: var Ro
         result.add(substr(pat, start, i - 1))
 
 proc genInfixCall(p: BProc, le, ri: PNode, d: var TLoc) =
-  var op = initLocExpr(p, ri[0])
+  var op: TLoc = initLocExpr(p, ri[0])
   # getUniqueType() is too expensive here:
   var typ = skipTypes(ri[0].typ, abstractInst)
   assert(typ.kind == tyProc)
+  assert(typ.len == typ.n.len)
   # don't call '$' here for efficiency:
-  let pat = $ri[0].sym.loc.snippet
+  let pat = $ri[0].sym.loc.r
   internalAssert p.config, pat.len > 0
   if pat.contains({'#', '(', '@', '\''}):
     var pl = newRopeAppender()
     genPatternCall(p, ri, pat, typ, pl)
     # simpler version of 'fixupCall' that works with the pl+params combination:
     var typ = skipTypes(ri[0].typ, abstractInst)
-    if typ.returnType != nil:
+    if typ[0] != nil:
       if p.module.compileToCpp and lfSingleUse in d.flags:
         # do not generate spurious temporaries for C++! For C we're better off
         # with them to prevent undefined behaviour and because the codegen
         # is free to emit expressions multiple times!
         d.k = locCall
-        d.snippet = pl
+        d.r = pl
         excl d.flags, lfSingleUse
       else:
-        if d.k == locNone: d = getTemp(p, typ.returnType)
+        if d.k == locNone: d = getTemp(p, typ[0])
         assert(d.t != nil)        # generate an assignment to d:
         var list: TLoc = initLoc(locCall, d.lode, OnUnknown)
-        list.snippet = pl
+        list.r = pl
         genAssignment(p, d, list, {}) # no need for deep copying
     else:
       pl.add(";\n")
@@ -756,27 +706,29 @@ proc genInfixCall(p: BProc, le, ri: PNode, d: var TLoc) =
     var argsCounter = 0
     if 1 < ri.len:
       genThisArg(p, ri, 1, typ, pl)
-    pl.add(op.snippet)
+    pl.add(op.r)
     var params = newRopeAppender()
     for i in 2..<ri.len:
+      assert(typ.len == typ.n.len)
       genOtherArg(p, ri, i, typ, params, argsCounter)
     fixupCall(p, le, ri, d, pl, params)
 
 proc genNamedParamCall(p: BProc, ri: PNode, d: var TLoc) =
   # generates a crappy ObjC call
-  var op = initLocExpr(p, ri[0])
+  var op: TLoc = initLocExpr(p, ri[0])
   var pl = "["
   # getUniqueType() is too expensive here:
   var typ = skipTypes(ri[0].typ, abstractInst)
   assert(typ.kind == tyProc)
+  assert(typ.len == typ.n.len)
 
   # don't call '$' here for efficiency:
-  let pat = $ri[0].sym.loc.snippet
+  let pat = $ri[0].sym.loc.r
   internalAssert p.config, pat.len > 0
   var start = 3
   if ' ' in pat:
     start = 1
-    pl.add(op.snippet)
+    pl.add(op.r)
     if ri.len > 1:
       pl.add(": ")
       genArg(p, ri[1], typ.n[1].sym, ri, pl)
@@ -785,12 +737,13 @@ proc genNamedParamCall(p: BProc, ri: PNode, d: var TLoc) =
     if ri.len > 1:
       genArg(p, ri[1], typ.n[1].sym, ri, pl)
       pl.add(" ")
-    pl.add(op.snippet)
+    pl.add(op.r)
     if ri.len > 2:
       pl.add(": ")
       genArg(p, ri[2], typ.n[2].sym, ri, pl)
   for i in start..<ri.len:
-    if i >= typ.n.len:
+    assert(typ.len == typ.n.len)
+    if i >= typ.len:
       internalError(p.config, ri.info, "varargs for objective C method?")
     assert(typ.n[i].kind == nkSym)
     var param = typ.n[i].sym
@@ -798,29 +751,29 @@ proc genNamedParamCall(p: BProc, ri: PNode, d: var TLoc) =
     pl.add(param.name.s)
     pl.add(": ")
     genArg(p, ri[i], param, ri, pl)
-  if typ.returnType != nil:
+  if typ[0] != nil:
     if isInvalidReturnType(p.config, typ):
       if ri.len > 1: pl.add(" ")
       # beware of 'result = p(result)'. We always allocate a temporary:
       if d.k in {locTemp, locNone}:
         # We already got a temp. Great, special case it:
-        if d.k == locNone: d = getTemp(p, typ.returnType, needsInit=true)
+        if d.k == locNone: d = getTemp(p, typ[0], needsInit=true)
         pl.add("Result: ")
         pl.add(addrLoc(p.config, d))
         pl.add("];\n")
         line(p, cpsStmts, pl)
       else:
-        var tmp: TLoc = getTemp(p, typ.returnType, needsInit=true)
+        var tmp: TLoc = getTemp(p, typ[0], needsInit=true)
         pl.add(addrLoc(p.config, tmp))
         pl.add("];\n")
         line(p, cpsStmts, pl)
         genAssignment(p, d, tmp, {}) # no need for deep copying
     else:
       pl.add("]")
-      if d.k == locNone: d = getTemp(p, typ.returnType)
+      if d.k == locNone: d = getTemp(p, typ[0])
       assert(d.t != nil)        # generate an assignment to d:
       var list: TLoc = initLoc(locCall, ri, OnUnknown)
-      list.snippet = pl
+      list.r = pl
       genAssignment(p, d, list, {}) # no need for deep copying
   else:
     pl.add("];\n")

compiler/ccgreset.nim

@@ -24,10 +24,10 @@ proc specializeResetN(p: BProc, accessor: Rope, n: PNode;
   of nkRecCase:
     if (n[0].kind != nkSym): internalError(p.config, n.info, "specializeResetN")
     let disc = n[0].sym
-    if disc.loc.snippet == "": fillObjectFields(p.module, typ)
+    if disc.loc.r == "": fillObjectFields(p.module, typ)
     if disc.loc.t == nil:
       internalError(p.config, n.info, "specializeResetN()")
-    lineF(p, cpsStmts, "switch ($1.$2) {$n", [accessor, disc.loc.snippet])
+    lineF(p, cpsStmts, "switch ($1.$2) {$n", [accessor, disc.loc.r])
     for i in 1..<n.len:
       let branch = n[i]
       assert branch.kind in {nkOfBranch, nkElse}
@@ -38,14 +38,14 @@ proc specializeResetN(p: BProc, accessor: Rope, n: PNode;
       specializeResetN(p, accessor, lastSon(branch), typ)
       lineF(p, cpsStmts, "break;$n", [])
     lineF(p, cpsStmts, "} $n", [])
-    specializeResetT(p, "$1.$2" % [accessor, disc.loc.snippet], disc.loc.t)
+    specializeResetT(p, "$1.$2" % [accessor, disc.loc.r], disc.loc.t)
   of nkSym:
     let field = n.sym
     if field.typ.kind == tyVoid: return
-    if field.loc.snippet == "": fillObjectFields(p.module, typ)
+    if field.loc.r == "": fillObjectFields(p.module, typ)
     if field.loc.t == nil:
       internalError(p.config, n.info, "specializeResetN()")
-    specializeResetT(p, "$1.$2" % [accessor, field.loc.snippet], field.loc.t)
+    specializeResetT(p, "$1.$2" % [accessor, field.loc.r], field.loc.t)
   else: internalError(p.config, n.info, "specializeResetN()")
 
 proc specializeResetT(p: BProc, accessor: Rope, typ: PType) =
@@ -54,23 +54,24 @@ proc specializeResetT(p: BProc, accessor: Rope, typ: PType) =
   case typ.kind
   of tyGenericInst, tyGenericBody, tyTypeDesc, tyAlias, tyDistinct, tyInferred,
      tySink, tyOwned:
-    specializeResetT(p, accessor, skipModifier(typ))
+    specializeResetT(p, accessor, lastSon(typ))
   of tyArray:
-    let arraySize = lengthOrd(p.config, typ.indexType)
+    let arraySize = lengthOrd(p.config, typ[0])
     var i: TLoc = getTemp(p, getSysType(p.module.g.graph, unknownLineInfo, tyInt))
     linefmt(p, cpsStmts, "for ($1 = 0; $1 < $2; $1++) {$n",
-            [i.snippet, arraySize])
-    specializeResetT(p, ropecg(p.module, "$1[$2]", [accessor, i.snippet]), typ.elementType)
+            [i.r, arraySize])
+    specializeResetT(p, ropecg(p.module, "$1[$2]", [accessor, i.r]), typ[1])
     lineF(p, cpsStmts, "}$n", [])
   of tyObject:
-    var x = typ.baseClass
-    if x != nil: x = x.skipTypes(skipPtrs)
-    specializeResetT(p, accessor.parentObj(p.module), x)
+    for i in 0..<typ.len:
+      var x = typ[i]
+      if x != nil: x = x.skipTypes(skipPtrs)
+      specializeResetT(p, accessor.parentObj(p.module), x)
     if typ.n != nil: specializeResetN(p, accessor, typ.n, typ)
   of tyTuple:
     let typ = getUniqueType(typ)
-    for i, a in typ.ikids:
-      specializeResetT(p, ropecg(p.module, "$1.Field$2", [accessor, i]), a)
+    for i in 0..<typ.len:
+      specializeResetT(p, ropecg(p.module, "$1.Field$2", [accessor, i]), typ[i])
 
   of tyString, tyRef, tySequence:
     lineCg(p, cpsStmts, "#unsureAsgnRef((void**)&$1, NIM_NIL);$n", [accessor])
@@ -81,7 +82,7 @@ proc specializeResetT(p: BProc, accessor: Rope, typ: PType) =
       lineCg(p, cpsStmts, "$1.ClP_0 = NIM_NIL;$n", [accessor])
     else:
       lineCg(p, cpsStmts, "$1 = NIM_NIL;$n", [accessor])
-  of tyChar, tyBool, tyEnum, tyRange, tyInt..tyUInt64:
+  of tyChar, tyBool, tyEnum, tyInt..tyUInt64:
     lineCg(p, cpsStmts, "$1 = 0;$n", [accessor])
   of tyCstring, tyPointer, tyPtr, tyVar, tyLent:
     lineCg(p, cpsStmts, "$1 = NIM_NIL;$n", [accessor])
@@ -94,11 +95,11 @@ proc specializeResetT(p: BProc, accessor: Rope, typ: PType) =
       lineCg(p, cpsStmts, "$1 = 0;$n", [accessor])
     else:
       raiseAssert "unexpected set type kind"
-  of tyNone, tyEmpty, tyNil, tyUntyped, tyTyped, tyGenericInvocation,
-      tyGenericParam, tyOrdinal, tyOpenArray, tyForward, tyVarargs,
-      tyUncheckedArray, tyError, tyBuiltInTypeClass, tyUserTypeClass,
+  of {tyNone, tyEmpty, tyNil, tyUntyped, tyTyped, tyGenericInvocation,
+      tyGenericParam, tyOrdinal, tyRange, tyOpenArray, tyForward, tyVarargs,
+      tyUncheckedArray, tyProxy, tyBuiltInTypeClass, tyUserTypeClass,
       tyUserTypeClassInst, tyCompositeTypeClass, tyAnd, tyOr, tyNot,
-      tyAnything, tyStatic, tyFromExpr, tyConcept, tyVoid, tyIterable:
+      tyAnything, tyStatic, tyFromExpr, tyConcept, tyVoid, tyIterable}:
     discard
 
 proc specializeReset(p: BProc, a: TLoc) =

compiler/ccgstmts.nim

@@ -110,10 +110,10 @@ proc genVarTuple(p: BProc, n: PNode) =
       initLocalVar(p, v, immediateAsgn=isAssignedImmediately(p.config, n[^1]))
     var field = initLoc(locExpr, vn, tup.storage)
     if t.kind == tyTuple:
-      field.snippet = "$1.Field$2" % [rdLoc(tup), rope(i)]
+      field.r = "$1.Field$2" % [rdLoc(tup), rope(i)]
     else:
       if t.n[i].kind != nkSym: internalError(p.config, n.info, "genVarTuple")
-      field.snippet = "$1.$2" % [rdLoc(tup), mangleRecFieldName(p.module, t.n[i].sym)]
+      field.r = "$1.$2" % [rdLoc(tup), mangleRecFieldName(p.module, t.n[i].sym)]
     putLocIntoDest(p, v.loc, field)
     if forHcr or isGlobalInBlock:
       hcrGlobals.add((loc: v.loc, tp: "NULL"))
@@ -128,7 +128,7 @@ proc genVarTuple(p: BProc, n: PNode) =
     lineCg(p, cpsLocals, "NIM_BOOL $1 = NIM_FALSE;$n", [hcrCond])
     for curr in hcrGlobals:
       lineCg(p, cpsLocals, "$1 |= hcrRegisterGlobal($4, \"$2\", sizeof($3), $5, (void**)&$2);$N",
-              [hcrCond, curr.loc.snippet, rdLoc(curr.loc), getModuleDllPath(p.module, n[0].sym), curr.tp])
+              [hcrCond, curr.loc.r, rdLoc(curr.loc), getModuleDllPath(p.module, n[0].sym), curr.tp])
 
 
 proc loadInto(p: BProc, le, ri: PNode, a: var TLoc) {.inline.} =
@@ -267,11 +267,11 @@ proc genBreakState(p: BProc, n: PNode, d: var TLoc) =
 
   if n[0].kind == nkClosure:
     a = initLocExpr(p, n[0][1])
-    d.snippet = "(((NI*) $1)[1] < 0)" % [rdLoc(a)]
+    d.r = "(((NI*) $1)[1] < 0)" % [rdLoc(a)]
   else:
     a = initLocExpr(p, n[0])
     # the environment is guaranteed to contain the 'state' field at offset 1:
-    d.snippet = "((((NI*) $1.ClE_0)[1]) < 0)" % [rdLoc(a)]
+    d.r = "((((NI*) $1.ClE_0)[1]) < 0)" % [rdLoc(a)]
 
 proc genGotoVar(p: BProc; value: PNode) =
   if value.kind notin {nkCharLit..nkUInt64Lit}:
@@ -289,32 +289,14 @@ proc potentialValueInit(p: BProc; v: PSym; value: PNode; result: var Rope) =
     #echo "New code produced for ", v.name.s, " ", p.config $ value.info
     genBracedInit(p, value, isConst = false, v.typ, result)
 
-proc genCppParamsForCtor(p: BProc; call: PNode; didGenTemp: var bool): string =
-  result = ""
+proc genCppVarForCtor(p: BProc, v: PSym; vn, value: PNode; decl: var Rope) =
+  var params = newRopeAppender()
   var argsCounter = 0
-  let typ = skipTypes(call[0].typ, abstractInst)
+  let typ = skipTypes(value[0].typ, abstractInst)
   assert(typ.kind == tyProc)
-  for i in 1..<call.len:
-    #if it's a type we can just generate here another initializer as we are in an initializer context
-    if call[i].kind == nkCall and call[i][0].kind == nkSym and call[i][0].sym.kind == skType:
-      if argsCounter > 0: result.add ","
-      result.add genCppInitializer(p.module, p, call[i][0].sym.typ, didGenTemp)
-    else:
-      #We need to test for temp in globals, see: #23657
-      let param =
-        if typ[i].kind in {tyVar} and call[i].kind == nkHiddenAddr:
-          call[i][0]
-        else:
-          call[i]
-      if param.kind != nkBracketExpr or param.typ.kind in
-        {tyRef, tyPtr, tyUncheckedArray, tyArray, tyOpenArray,
-          tyVarargs, tySequence, tyString, tyCstring, tyTuple}:
-        let tempLoc = initLocExprSingleUse(p, param)
-        didGenTemp = didGenTemp or tempLoc.k == locTemp
-      genOtherArg(p, call, i, typ, result, argsCounter)
-
-proc genCppVarForCtor(p: BProc; call: PNode; decl: var Rope, didGenTemp: var bool) =
-  let params = genCppParamsForCtor(p, call, didGenTemp)
+  for i in 1..<value.len:
+    assert(typ.len == typ.n.len)
+    genOtherArg(p, value, i, typ, params, argsCounter)
   if params.len == 0:
     decl = runtimeFormat("$#;\n", [decl])
   else:
@@ -341,14 +323,7 @@ proc genSingleVar(p: BProc, v: PSym; vn, value: PNode) =
       # v.owner.kind != skModule:
       targetProc = p.module.preInitProc
     if isCppCtorCall and not containsHiddenPointer(v.typ):
-      var didGenTemp = false
-      callGlobalVarCppCtor(targetProc, v, vn, value, didGenTemp)
-      if didGenTemp:
-        message(p.config, vn.info, warnGlobalVarConstructorTemporary, vn.sym.name.s)
-        #We fail to call the constructor in the global scope so we do the call inside the main proc
-        assignGlobalVar(targetProc, vn, valueAsRope)
-        var loc = initLocExprSingleUse(targetProc, value)
-        genAssignment(targetProc, v.loc, loc, {})
+      callGlobalVarCppCtor(targetProc, v, vn, value)
     else:
       assignGlobalVar(targetProc, vn, valueAsRope)
 
@@ -383,15 +358,11 @@ proc genSingleVar(p: BProc, v: PSym; vn, value: PNode) =
       var decl = localVarDecl(p, vn)
       var tmp: TLoc
       if isCppCtorCall:
-        var didGenTemp = false
-        genCppVarForCtor(p, value, decl, didGenTemp)
+        genCppVarForCtor(p, v, vn, value, decl)
         line(p, cpsStmts, decl)
       else:
         tmp = initLocExprSingleUse(p, value)
-        if value.kind == nkEmpty:
-          lineF(p, cpsStmts, "$#;\n", [decl])
-        else:
-          lineF(p, cpsStmts, "$# = $#;\n", [decl, tmp.rdLoc])
+        lineF(p, cpsStmts, "$# = $#;\n", [decl, tmp.rdLoc])
       return
     assignLocalVar(p, vn)
     initLocalVar(p, v, imm)
@@ -405,7 +376,7 @@ proc genSingleVar(p: BProc, v: PSym; vn, value: PNode) =
     # put it in the locals section - mainly because of loops which
     # use the var in a call to resetLoc() in the statements section
     lineCg(targetProc, cpsLocals, "hcrRegisterGlobal($3, \"$1\", sizeof($2), $4, (void**)&$1);$n",
-           [v.loc.snippet, rdLoc(v.loc), getModuleDllPath(p.module, v), traverseProc])
+           [v.loc.r, rdLoc(v.loc), getModuleDllPath(p.module, v), traverseProc])
     # nothing special left to do later on - let's avoid closing and reopening blocks
     forHcr = false
 
@@ -414,7 +385,7 @@ proc genSingleVar(p: BProc, v: PSym; vn, value: PNode) =
   # be able to re-run it but without the top level code - just the init of globals
   if forHcr:
     lineCg(targetProc, cpsStmts, "if (hcrRegisterGlobal($3, \"$1\", sizeof($2), $4, (void**)&$1))$N",
-           [v.loc.snippet, rdLoc(v.loc), getModuleDllPath(p.module, v), traverseProc])
+           [v.loc.r, rdLoc(v.loc), getModuleDllPath(p.module, v), traverseProc])
     startBlock(targetProc)
   if value.kind != nkEmpty and valueAsRope.len == 0:
     genLineDir(targetProc, vn)
@@ -755,18 +726,6 @@ proc raiseExit(p: BProc) =
       lineCg(p, cpsStmts, "if (NIM_UNLIKELY(*nimErr_)) goto LA$1_;$n",
         [p.nestedTryStmts[^1].label])
 
-proc raiseExitCleanup(p: BProc, destroy: string) =
-  assert p.config.exc == excGoto
-  if nimErrorFlagDisabled notin p.flags:
-    p.flags.incl nimErrorFlagAccessed
-    if p.nestedTryStmts.len == 0:
-      p.flags.incl beforeRetNeeded
-      # easy case, simply goto 'ret':
-      lineCg(p, cpsStmts, "if (NIM_UNLIKELY(*nimErr_)) {$1; goto BeforeRet_;}$n", [destroy])
-    else:
-      lineCg(p, cpsStmts, "if (NIM_UNLIKELY(*nimErr_)) {$2; goto LA$1_;}$n",
-        [p.nestedTryStmts[^1].label, destroy])
-
 proc finallyActions(p: BProc) =
   if p.config.exc != excGoto and p.nestedTryStmts.len > 0 and p.nestedTryStmts[^1].inExcept:
     # if the current try stmt have a finally block,
@@ -796,14 +755,10 @@ proc genRaiseStmt(p: BProc, t: PNode) =
     var e = rdLoc(a)
     discard getTypeDesc(p.module, t[0].typ)
     var typ = skipTypes(t[0].typ, abstractPtrs)
-    case p.config.exc
-    of excCpp:
+    # XXX For reasons that currently escape me, this is only required by the new
+    # C++ based exception handling:
+    if p.config.exc == excCpp:
       blockLeaveActions(p, howManyTrys = 0, howManyExcepts = p.inExceptBlockLen)
-    of excGoto:
-      blockLeaveActions(p, howManyTrys = 0,
-        howManyExcepts = (if p.nestedTryStmts.len > 0 and p.nestedTryStmts[^1].inExcept: 1 else: 0))
-    else:
-      discard
     genLineDir(p, t)
     if isImportedException(typ, p.config):
       lineF(p, cpsStmts, "throw $1;$n", [e])
@@ -1008,11 +963,8 @@ proc genOrdinalCase(p: BProc, n: PNode, d: var TLoc) =
         hasDefault = true
       exprBlock(p, branch.lastSon, d)
       lineF(p, cpsStmts, "break;$n", [])
-    if not hasDefault:
-      if hasBuiltinUnreachable in CC[p.config.cCompiler].props:
-        lineF(p, cpsStmts, "default: __builtin_unreachable();$n", [])
-      elif hasAssume in CC[p.config.cCompiler].props:
-        lineF(p, cpsStmts, "default: __assume(0);$n", [])
+    if (hasAssume in CC[p.config.cCompiler].props) and not hasDefault:
+      lineF(p, cpsStmts, "default: __assume(0);$n", [])
     lineF(p, cpsStmts, "}$n", [])
   if lend != "": fixLabel(p, lend)
 
@@ -1075,8 +1027,8 @@ proc genTryCpp(p: BProc, t: PNode, d: var TLoc) =
 
   inc(p.labels, 2)
   let etmp = p.labels
-  #init on locals, fixes #23306
-  lineCg(p, cpsLocals, "std::exception_ptr T$1_;$n", [etmp])
+
+  lineCg(p, cpsStmts, "std::exception_ptr T$1_;$n", [etmp])
 
   let fin = if t[^1].kind == nkFinally: t[^1] else: nil
   p.nestedTryStmts.add((fin, false, 0.Natural))
@@ -1494,8 +1446,7 @@ proc genTrySetjmp(p: BProc, t: PNode, d: var TLoc) =
         let memberName = if p.module.compileToCpp: "m_type" else: "Sup.m_type"
         if optTinyRtti in p.config.globalOptions:
           let checkFor = $getObjDepth(t[i][j].typ)
-          appcg(p.module, orExpr, "#isObjDisplayCheck(#nimBorrowCurrentException()->$1, $2, $3)",
-              [memberName, checkFor, $genDisplayElem(MD5Digest(hashType(t[i][j].typ, p.config)))])
+          appcg(p.module, orExpr, "#isObjDisplayCheck(#nimBorrowCurrentException()->$1, $2, $3)", [memberName, checkFor,  $genDisplayElem(MD5Digest(hashType(t[i][j].typ, p.config)))])
         else:
           let checkFor = genTypeInfoV1(p.module, t[i][j].typ, t[i][j].info)
           appcg(p.module, orExpr, "#isObj(#nimBorrowCurrentException()->$1, $2)", [memberName, checkFor])
@@ -1526,12 +1477,7 @@ proc genTrySetjmp(p: BProc, t: PNode, d: var TLoc) =
 
 proc genAsmOrEmitStmt(p: BProc, t: PNode, isAsmStmt=false; result: var Rope) =
   var res = ""
-  let offset =
-    if isAsmStmt: 1 # first son is pragmas
-    else: 0
-
-  for i in offset..<t.len:
-    let it = t[i]
+  for it in t.sons:
     case it.kind
     of nkStrLit..nkTripleStrLit:
       res.add(it.strVal)
@@ -1545,7 +1491,7 @@ proc genAsmOrEmitStmt(p: BProc, t: PNode, isAsmStmt=false; result: var Rope) =
       else:
         discard getTypeDesc(p.module, skipTypes(sym.typ, abstractPtrs))
         fillBackendName(p.module, sym)
-        res.add($sym.loc.snippet)
+        res.add($sym.loc.r)
     of nkTypeOfExpr:
       res.add($getTypeDesc(p.module, it.typ))
     else:
@@ -1575,21 +1521,6 @@ proc genAsmStmt(p: BProc, t: PNode) =
   assert(t.kind == nkAsmStmt)
   genLineDir(p, t)
   var s = newRopeAppender()
-
-  var asmSyntax = ""
-  if (let p = t[0]; p.kind == nkPragma):
-    for i in p:
-      if whichPragma(i) == wAsmSyntax:
-        asmSyntax = i[1].strVal
-
-  if asmSyntax != "" and
-     not (
-      asmSyntax == "gcc" and hasGnuAsm in CC[p.config.cCompiler].props or
-      asmSyntax == "vcc" and hasGnuAsm notin CC[p.config.cCompiler].props):
-    localError(
-      p.config, t.info,
-      "Your compiler does not support the specified inline assembler")
-
   genAsmOrEmitStmt(p, t, isAsmStmt=true, s)
   # see bug #2362, "top level asm statements" seem to be a mis-feature
   # but even if we don't do this, the example in #2362 cannot possibly
@@ -1627,9 +1558,9 @@ proc genPragma(p: BProc, n: PNode) =
     case whichPragma(it)
     of wEmit: genEmit(p, it)
     of wPush:
-      processPushBackendOption(p.config, p.optionsStack, p.options, n, i+1)
+      processPushBackendOption(p.optionsStack, p.options, n, i+1)
     of wPop:
-      processPopBackendOption(p.config, p.optionsStack, p.options)
+      processPopBackendOption(p.optionsStack, p.options)
     else: discard
 
 

compiler/ccgthreadvars.nim

@@ -30,7 +30,7 @@ proc declareThreadVar(m: BModule, s: PSym, isExtern: bool) =
     # allocator for it :-(
     if not containsOrIncl(m.g.nimtvDeclared, s.id):
       m.g.nimtvDeps.add(s.loc.t)
-      m.g.nimtv.addf("$1 $2;$n", [getTypeDesc(m, s.loc.t), s.loc.snippet])
+      m.g.nimtv.addf("$1 $2;$n", [getTypeDesc(m, s.loc.t), s.loc.r])
   else:
     if isExtern: m.s[cfsVars].add("extern ")
     elif lfExportLib in s.loc.flags: m.s[cfsVars].add("N_LIB_EXPORT_VAR ")
@@ -41,7 +41,7 @@ proc declareThreadVar(m: BModule, s: PSym, isExtern: bool) =
         m.s[cfsVars].add("NIM_THREAD_LOCAL ")
       else: m.s[cfsVars].add("NIM_THREADVAR ")
     m.s[cfsVars].add(getTypeDesc(m, s.loc.t))
-    m.s[cfsVars].addf(" $1;$n", [s.loc.snippet])
+    m.s[cfsVars].addf(" $1;$n", [s.loc.r])
 
 proc generateThreadLocalStorage(m: BModule) =
   if m.g.nimtv != "" and (usesThreadVars in m.flags or sfMainModule in m.module.flags):

compiler/ccgtrav.nim

@@ -34,10 +34,10 @@ proc genTraverseProc(c: TTraversalClosure, accessor: Rope, n: PNode;
     if (n[0].kind != nkSym): internalError(c.p.config, n.info, "genTraverseProc")
     var p = c.p
     let disc = n[0].sym
-    if disc.loc.snippet == "": fillObjectFields(c.p.module, typ)
+    if disc.loc.r == "": fillObjectFields(c.p.module, typ)
     if disc.loc.t == nil:
       internalError(c.p.config, n.info, "genTraverseProc()")
-    lineF(p, cpsStmts, "switch ($1.$2) {$n", [accessor, disc.loc.snippet])
+    lineF(p, cpsStmts, "switch ($1.$2) {$n", [accessor, disc.loc.r])
     for i in 1..<n.len:
       let branch = n[i]
       assert branch.kind in {nkOfBranch, nkElse}
@@ -51,10 +51,10 @@ proc genTraverseProc(c: TTraversalClosure, accessor: Rope, n: PNode;
   of nkSym:
     let field = n.sym
     if field.typ.kind == tyVoid: return
-    if field.loc.snippet == "": fillObjectFields(c.p.module, typ)
+    if field.loc.r == "": fillObjectFields(c.p.module, typ)
     if field.loc.t == nil:
       internalError(c.p.config, n.info, "genTraverseProc()")
-    genTraverseProc(c, "$1.$2" % [accessor, field.loc.snippet], field.loc.t)
+    genTraverseProc(c, "$1.$2" % [accessor, field.loc.r], field.loc.t)
   else: internalError(c.p.config, n.info, "genTraverseProc()")
 
 proc parentObj(accessor: Rope; m: BModule): Rope {.inline.} =
@@ -71,36 +71,37 @@ proc genTraverseProc(c: TTraversalClosure, accessor: Rope, typ: PType) =
   case typ.kind
   of tyGenericInst, tyGenericBody, tyTypeDesc, tyAlias, tyDistinct, tyInferred,
      tySink, tyOwned:
-    genTraverseProc(c, accessor, skipModifier(typ))
+    genTraverseProc(c, accessor, lastSon(typ))
   of tyArray:
-    let arraySize = lengthOrd(c.p.config, typ.indexType)
+    let arraySize = lengthOrd(c.p.config, typ[0])
     var i: TLoc = getTemp(p, getSysType(c.p.module.g.graph, unknownLineInfo, tyInt))
     var oldCode = p.s(cpsStmts)
     freeze oldCode
     linefmt(p, cpsStmts, "for ($1 = 0; $1 < $2; $1++) {$n",
-            [i.snippet, arraySize])
+            [i.r, arraySize])
     let oldLen = p.s(cpsStmts).len
-    genTraverseProc(c, ropecg(c.p.module, "$1[$2]", [accessor, i.snippet]), typ.elementType)
+    genTraverseProc(c, ropecg(c.p.module, "$1[$2]", [accessor, i.r]), typ[1])
     if p.s(cpsStmts).len == oldLen:
       # do not emit dummy long loops for faster debug builds:
       p.s(cpsStmts) = oldCode
     else:
       lineF(p, cpsStmts, "}$n", [])
   of tyObject:
-    var x = typ.baseClass
-    if x != nil: x = x.skipTypes(skipPtrs)
-    genTraverseProc(c, accessor.parentObj(c.p.module), x)
+    for i in 0..<typ.len:
+      var x = typ[i]
+      if x != nil: x = x.skipTypes(skipPtrs)
+      genTraverseProc(c, accessor.parentObj(c.p.module), x)
     if typ.n != nil: genTraverseProc(c, accessor, typ.n, typ)
   of tyTuple:
     let typ = getUniqueType(typ)
-    for i, a in typ.ikids:
-      genTraverseProc(c, ropecg(c.p.module, "$1.Field$2", [accessor, i]), a)
+    for i in 0..<typ.len:
+      genTraverseProc(c, ropecg(c.p.module, "$1.Field$2", [accessor, i]), typ[i])
   of tyRef:
     lineCg(p, cpsStmts, visitorFrmt, [accessor, c.visitorFrmt])
   of tySequence:
     if optSeqDestructors notin c.p.module.config.globalOptions:
       lineCg(p, cpsStmts, visitorFrmt, [accessor, c.visitorFrmt])
-    elif containsGarbageCollectedRef(typ.elementType):
+    elif containsGarbageCollectedRef(typ.lastSon):
       # destructor based seqs are themselves not traced but their data is, if
       # they contain a GC'ed type:
       lineCg(p, cpsStmts, "#nimGCvisitSeq((void*)$1, $2);$n", [accessor, c.visitorFrmt])
@@ -117,15 +118,15 @@ proc genTraverseProc(c: TTraversalClosure, accessor: Rope, typ: PType) =
 proc genTraverseProcSeq(c: TTraversalClosure, accessor: Rope, typ: PType) =
   var p = c.p
   assert typ.kind == tySequence
-  var i = getTemp(p, getSysType(c.p.module.g.graph, unknownLineInfo, tyInt))
+  var i: TLoc = getTemp(p, getSysType(c.p.module.g.graph, unknownLineInfo, tyInt))
   var oldCode = p.s(cpsStmts)
   freeze oldCode
-  var a = TLoc(snippet: accessor)
+  var a: TLoc = TLoc(r: accessor)
 
   lineF(p, cpsStmts, "for ($1 = 0; $1 < $2; $1++) {$n",
-      [i.snippet, lenExpr(c.p, a)])
+      [i.r, lenExpr(c.p, a)])
   let oldLen = p.s(cpsStmts).len
-  genTraverseProc(c, "$1$3[$2]" % [accessor, i.snippet, dataField(c.p)], typ.elementType)
+  genTraverseProc(c, "$1$3[$2]" % [accessor, i.r, dataField(c.p)], typ[0])
   if p.s(cpsStmts).len == oldLen:
     # do not emit dummy long loops for faster debug builds:
     p.s(cpsStmts) = oldCode
@@ -133,6 +134,7 @@ proc genTraverseProcSeq(c: TTraversalClosure, accessor: Rope, typ: PType) =
     lineF(p, cpsStmts, "}$n", [])
 
 proc genTraverseProc(m: BModule, origTyp: PType; sig: SigHash): Rope =
+  var c: TTraversalClosure
   var p = newProc(nil, m)
   result = "Marker_" & getTypeName(m, origTyp, sig)
   let
@@ -145,19 +147,18 @@ proc genTraverseProc(m: BModule, origTyp: PType; sig: SigHash): Rope =
   lineF(p, cpsLocals, "$1 a;$n", [t])
   lineF(p, cpsInit, "a = ($1)p;$n", [t])
 
-  var c = TTraversalClosure(p: p,
-    visitorFrmt: "op" # "#nimGCvisit((void*)$1, op);$n"
-    )
+  c.p = p
+  c.visitorFrmt = "op" # "#nimGCvisit((void*)$1, op);$n"
 
   assert typ.kind != tyTypeDesc
   if typ.kind == tySequence:
     genTraverseProcSeq(c, "a".rope, typ)
   else:
-    if skipTypes(typ.elementType, typedescInst+{tyOwned}).kind == tyArray:
+    if skipTypes(typ[0], typedescInst+{tyOwned}).kind == tyArray:
       # C's arrays are broken beyond repair:
-      genTraverseProc(c, "a".rope, typ.elementType)
+      genTraverseProc(c, "a".rope, typ[0])
     else:
-      genTraverseProc(c, "(*a)".rope, typ.elementType)
+      genTraverseProc(c, "(*a)".rope, typ[0])
 
   let generatedProc = "$1 {$n$2$3$4}\n" %
         [header, p.s(cpsLocals), p.s(cpsInit), p.s(cpsStmts)]
@@ -173,6 +174,7 @@ proc genTraverseProc(m: BModule, origTyp: PType; sig: SigHash): Rope =
 proc genTraverseProcForGlobal(m: BModule, s: PSym; info: TLineInfo): Rope =
   discard genTypeInfoV1(m, s.loc.t, info)
 
+  var c: TTraversalClosure
   var p = newProc(nil, m)
   var sLoc = rdLoc(s.loc)
   result = getTempName(m)
@@ -181,10 +183,8 @@ proc genTraverseProcForGlobal(m: BModule, s: PSym; info: TLineInfo): Rope =
     accessThreadLocalVar(p, s)
     sLoc = "NimTV_->" & sLoc
 
-  var c = TTraversalClosure(p: p,
-    visitorFrmt: "0" # "#nimGCvisit((void*)$1, 0);$n"
-  )
-
+  c.visitorFrmt = "0" # "#nimGCvisit((void*)$1, 0);$n"
+  c.p = p
   let header = "static N_NIMCALL(void, $1)(void)" % [result]
   genTraverseProc(c, sLoc, s.loc.t)
 

compiler/ccgutils.nim

@@ -10,10 +10,8 @@
 # This module declares some helpers for the C code generator.
 
 import
-  ast, types, msgs, wordrecg,
-  platform, trees, options, cgendata, mangleutils
-
-import std/[hashes, strutils, formatfloat]
+  ast, types, hashes, strutils, msgs, wordrecg,
+  platform, trees, options, cgendata
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -68,6 +66,53 @@ proc makeSingleLineCString*(s: string): string =
     c.toCChar(result)
   result.add('\"')
 
+proc mangle*(name: string): string =
+  result = newStringOfCap(name.len)
+  var start = 0
+  if name[0] in Digits:
+    result.add("X" & name[0])
+    start = 1
+  var requiresUnderscore = false
+  template special(x) =
+    result.add x
+    requiresUnderscore = true
+  for i in start..<name.len:
+    let c = name[i]
+    case c
+    of 'a'..'z', '0'..'9', 'A'..'Z':
+      result.add(c)
+    of '_':
+      # we generate names like 'foo_9' for scope disambiguations and so
+      # disallow this here:
+      if i > 0 and i < name.len-1 and name[i+1] in Digits:
+        discard
+      else:
+        result.add(c)
+    of '$': special "dollar"
+    of '%': special "percent"
+    of '&': special "amp"
+    of '^': special "roof"
+    of '!': special "emark"
+    of '?': special "qmark"
+    of '*': special "star"
+    of '+': special "plus"
+    of '-': special "minus"
+    of '/': special "slash"
+    of '\\': special "backslash"
+    of '=': special "eq"
+    of '<': special "lt"
+    of '>': special "gt"
+    of '~': special "tilde"
+    of ':': special "colon"
+    of '.': special "dot"
+    of '@': special "at"
+    of '|': special "bar"
+    else:
+      result.add("X" & toHex(ord(c), 2))
+      requiresUnderscore = true
+  if requiresUnderscore:
+    result.add "_"
+
 proc mapSetType(conf: ConfigRef; typ: PType): TCTypeKind =
   case int(getSize(conf, typ))
   of 1: result = ctInt8
@@ -79,10 +124,10 @@ proc mapSetType(conf: ConfigRef; typ: PType): TCTypeKind =
 proc ccgIntroducedPtr*(conf: ConfigRef; s: PSym, retType: PType): bool =
   var pt = skipTypes(s.typ, typedescInst)
   assert skResult != s.kind
-
+  
   #note precedence: params override types
   if optByRef in s.options: return true
-  elif sfByCopy in s.flags: return false
+  elif sfByCopy in s.flags: return false 
   elif tfByRef in pt.flags: return true
   elif tfByCopy in pt.flags: return false
   case pt.kind
@@ -90,9 +135,6 @@ proc ccgIntroducedPtr*(conf: ConfigRef; s: PSym, retType: PType): bool =
     if s.typ.sym != nil and sfForward in s.typ.sym.flags:
       # forwarded objects are *always* passed by pointers for consistency!
       result = true
-    elif s.typ.kind == tySink and conf.selectedGC notin {gcArc, gcAtomicArc, gcOrc, gcHooks}:
-      # bug #23354:
-      result = false
     elif (optByRef in s.options) or (getSize(conf, pt) > conf.target.floatSize * 3):
       result = true           # requested anyway
     elif (tfFinal in pt.flags) and (pt[0] == nil):
@@ -109,62 +151,3 @@ proc ccgIntroducedPtr*(conf: ConfigRef; s: PSym, retType: PType): bool =
     result = not (pt.kind in {tyVar, tyArray, tyOpenArray, tyVarargs, tyRef, tyPtr, tyPointer} or
       pt.kind == tySet and mapSetType(conf, pt) == ctArray)
 
-proc encodeName*(name: string): string =
-  result = mangle(name)
-  result = $result.len & result
-
-proc makeUnique(m: BModule; s: PSym, name: string = ""): string =
-  result = if name == "": s.name.s else: name
-  result.add "__"
-  result.add m.g.graph.ifaces[s.itemId.module].uniqueName
-  result.add "_u"
-  result.add $s.itemId.item
-
-proc encodeSym*(m: BModule; s: PSym; makeUnique: bool = false): string =
-  #Module::Type
-  var name = s.name.s
-  if makeUnique:
-    name = makeUnique(m, s, name)
-  "N" & encodeName(s.skipGenericOwner.name.s) & encodeName(name) & "E"
-
-proc encodeType*(m: BModule; t: PType): string =
-  result = ""
-  var kindName = ($t.kind)[2..^1]
-  kindName[0] = toLower($kindName[0])[0]
-  case t.kind
-  of tyObject, tyEnum, tyDistinct, tyUserTypeClass, tyGenericParam:
-    result = encodeSym(m, t.sym)
-  of tyGenericInst, tyUserTypeClassInst, tyGenericBody:
-    result = encodeName(t[0].sym.name.s)
-    result.add "I"
-    for i in 1..<t.len - 1:
-      result.add encodeType(m, t[i])
-    result.add "E"
-  of tySequence, tyOpenArray, tyArray, tyVarargs, tyTuple, tyProc, tySet, tyTypeDesc,
-    tyPtr, tyRef, tyVar, tyLent, tySink, tyStatic, tyUncheckedArray, tyOr, tyAnd, tyBuiltInTypeClass:
-    result =
-      case t.kind:
-      of tySequence: encodeName("seq")
-      else: encodeName(kindName)
-    result.add "I"
-    for i in 0..<t.len:
-      let s = t[i]
-      if s.isNil: continue
-      result.add encodeType(m, s)
-    result.add "E"
-  of tyRange:
-    var val = "range_"
-    if t.n[0].typ.kind in {tyFloat..tyFloat128}:
-      val.addFloat t.n[0].floatVal
-      val.add "_"
-      val.addFloat t.n[1].floatVal
-    else:
-      val.add $t.n[0].intVal & "_" & $t.n[1].intVal
-    result = encodeName(val)
-  of tyString..tyUInt64, tyPointer, tyBool, tyChar, tyVoid, tyAnything, tyNil, tyEmpty:
-    result = encodeName(kindName)
-  of tyAlias, tyInferred, tyOwned:
-    result = encodeType(m, t.elementType)
-  else:
-    assert false, "encodeType " & $t.kind
-

compiler/cgen.nim

@@ -10,15 +10,12 @@
 ## This module implements the C code generator.
 
 import
-  ast, astalgo, trees, platform, magicsys, extccomp, options,
+  ast, astalgo, hashes, trees, platform, magicsys, extccomp, options, intsets,
   nversion, nimsets, msgs, bitsets, idents, types,
-  ccgutils, ropes, wordrecg, treetab, cgmeth,
+  ccgutils, os, ropes, math, wordrecg, treetab, cgmeth,
   rodutils, renderer, cgendata, aliases,
-  lowerings, ndi, lineinfos, pathutils, transf,
-  injectdestructors, astmsgs, modulepaths, pushpoppragmas,
-  mangleutils
-
-from expanddefaults import caseObjDefaultBranch
+  lowerings, tables, sets, ndi, lineinfos, pathutils, transf,
+  injectdestructors, astmsgs, modulepaths, backendpragmas
 
 import pipelineutils
 
@@ -28,16 +25,10 @@ when defined(nimPreviewSlimSystem):
 when not defined(leanCompiler):
   import spawn, semparallel
 
-import std/strutils except `%`, addf # collides with ropes.`%`
+import strutils except `%`, addf # collides with ropes.`%`
 
 from ic / ic import ModuleBackendFlag
-import std/[dynlib, math, tables, sets, os, intsets, hashes]
-
-const
-  # we use some ASCII control characters to insert directives that will be converted to real code in a postprocessing pass
-  postprocessDirStart = '\1'
-  postprocessDirSep = '\31'
-  postprocessDirEnd = '\23'
+import dynlib
 
 when not declared(dynlib.libCandidates):
   proc libCandidates(s: string, dest: var seq[string]) =
@@ -72,7 +63,8 @@ proc findPendingModule(m: BModule, s: PSym): BModule =
 
 proc initLoc(k: TLocKind, lode: PNode, s: TStorageLoc, flags: TLocFlags = {}): TLoc =
   result = TLoc(k: k, storage: s, lode: lode,
-                snippet: "", flags: flags)
+               r: "", flags: flags
+  )
 
 proc fillLoc(a: var TLoc, k: TLocKind, lode: PNode, r: Rope, s: TStorageLoc) {.inline.} =
   # fills the loc if it is not already initialized
@@ -80,7 +72,7 @@ proc fillLoc(a: var TLoc, k: TLocKind, lode: PNode, r: Rope, s: TStorageLoc) {.i
     a.k = k
     a.lode = lode
     a.storage = s
-    if a.snippet == "": a.snippet = r
+    if a.r == "": a.r = r
 
 proc fillLoc(a: var TLoc, k: TLocKind, lode: PNode, s: TStorageLoc) {.inline.} =
   # fills the loc if it is not already initialized
@@ -127,7 +119,7 @@ proc getModuleDllPath(m: BModule, module: int): Rope =
 proc getModuleDllPath(m: BModule, s: PSym): Rope =
   result = getModuleDllPath(m.g.modules[s.itemId.module])
 
-import std/macros
+import macros
 
 proc cgFormatValue(result: var string; value: string) =
   result.add value
@@ -272,28 +264,24 @@ proc safeLineNm(info: TLineInfo): int =
   result = toLinenumber(info)
   if result < 0: result = 0 # negative numbers are not allowed in #line
 
-proc genPostprocessDir(field1, field2, field3: string): string =
-  result = postprocessDirStart & field1 & postprocessDirSep & field2 & postprocessDirSep & field3 & postprocessDirEnd
-
-proc genCLineDir(r: var Rope, fileIdx: FileIndex, line: int; conf: ConfigRef) =
+proc genCLineDir(r: var Rope, filename: string, line: int; conf: ConfigRef) =
   assert line >= 0
   if optLineDir in conf.options and line > 0:
-    if fileIdx == InvalidFileIdx:
-      r.add(rope("\n#line " & $line & " \"generated_not_to_break_here\"\n"))
-    else:
-      r.add(rope("\n#line " & $line & " FX_" & $fileIdx.int32 & "\n"))
+    r.addf("\n#line $2 $1\n",
+        [rope(makeSingleLineCString(filename)), rope(line)])
 
-proc genCLineDir(r: var Rope, fileIdx: FileIndex, line: int; p: BProc; info: TLineInfo; lastFileIndex: FileIndex) =
+proc genCLineDir(r: var Rope, filename: string, line: int; p: BProc; info: TLineInfo; lastFileIndex: FileIndex) =
   assert line >= 0
   if optLineDir in p.config.options and line > 0:
-    if fileIdx == InvalidFileIdx:
-      r.add(rope("\n#line " & $line & " \"generated_not_to_break_here\"\n"))
+    if lastFileIndex == info.fileIndex:
+        r.addf("\n#line $1\n", [rope(line)])
     else:
-      r.add(rope("\n#line " & $line & " FX_" & $fileIdx.int32 & "\n"))
+      r.addf("\n#line $2 $1\n",
+        [rope(makeSingleLineCString(filename)), rope(line)])
 
 proc genCLineDir(r: var Rope, info: TLineInfo; conf: ConfigRef) =
   if optLineDir in conf.options:
-    genCLineDir(r, info.fileIndex, info.safeLineNm, conf)
+    genCLineDir(r, toFullPath(conf, info), info.safeLineNm, conf)
 
 proc freshLineInfo(p: BProc; info: TLineInfo): bool =
   if p.lastLineInfo.line != info.line or
@@ -308,7 +296,7 @@ proc genCLineDir(r: var Rope, p: BProc, info: TLineInfo; conf: ConfigRef) =
   if optLineDir in conf.options:
     let lastFileIndex = p.lastLineInfo.fileIndex
     if freshLineInfo(p, info):
-      genCLineDir(r, info.fileIndex, info.safeLineNm, p, info, lastFileIndex)
+      genCLineDir(r, toFullPath(conf, info), info.safeLineNm, p, info, lastFileIndex)
 
 proc genLineDir(p: BProc, t: PNode) =
   if p == p.module.preInitProc: return
@@ -319,11 +307,16 @@ proc genLineDir(p: BProc, t: PNode) =
   let lastFileIndex = p.lastLineInfo.fileIndex
   let freshLine = freshLineInfo(p, t.info)
   if freshLine:
-    genCLineDir(p.s(cpsStmts), t.info.fileIndex, line, p, t.info, lastFileIndex)
+    genCLineDir(p.s(cpsStmts), toFullPath(p.config, t.info), line, p, t.info, lastFileIndex)
   if ({optLineTrace, optStackTrace} * p.options == {optLineTrace, optStackTrace}) and
       (p.prc == nil or sfPure notin p.prc.flags) and t.info.fileIndex != InvalidFileIdx:
       if freshLine:
-        line(p, cpsStmts, genPostprocessDir("nimln", $line, $t.info.fileIndex.int32))
+        if lastFileIndex == t.info.fileIndex:
+          linefmt(p, cpsStmts, "nimln_($1);",
+              [line])
+        else:
+          linefmt(p, cpsStmts, "nimlf_($1, $2);",
+              [line, quotedFilename(p.config, t.info)])
 
 proc accessThreadLocalVar(p: BProc, s: PSym)
 proc emulatedThreadVars(conf: ConfigRef): bool {.inline.}
@@ -340,15 +333,15 @@ proc getTempName(m: BModule): Rope =
 proc rdLoc(a: TLoc): Rope =
   # 'read' location (deref if indirect)
   if lfIndirect in a.flags:
-    result = "(*" & a.snippet & ")"
+    result = "(*" & a.r & ")"
   else:
-    result = a.snippet
+    result = a.r
 
 proc addRdLoc(a: TLoc; result: var Rope) =
   if lfIndirect in a.flags:
-    result.add "(*" & a.snippet & ")"
+    result.add "(*" & a.r & ")"
   else:
-    result.add a.snippet
+    result.add a.r
 
 proc lenField(p: BProc): Rope {.inline.} =
   result = rope(if p.module.compileToCpp: "len" else: "Sup.len")
@@ -371,9 +364,6 @@ proc dataField(p: BProc): Rope =
   else:
     result = rope"->data"
 
-proc genProcPrototype(m: BModule, sym: PSym)
-
-include cbuilder
 include ccgliterals
 include ccgtypes
 
@@ -386,22 +376,22 @@ template mapTypeChooser(a: TLoc): TSymKind = mapTypeChooser(a.lode)
 
 proc addAddrLoc(conf: ConfigRef; a: TLoc; result: var Rope) =
   if lfIndirect notin a.flags and mapType(conf, a.t, mapTypeChooser(a) == skParam) != ctArray:
-    result.add "(&" & a.snippet & ")"
+    result.add "(&" & a.r & ")"
   else:
-    result.add a.snippet
+    result.add a.r
 
 proc addrLoc(conf: ConfigRef; a: TLoc): Rope =
   if lfIndirect notin a.flags and mapType(conf, a.t, mapTypeChooser(a) == skParam) != ctArray:
-    result = "(&" & a.snippet & ")"
+    result = "(&" & a.r & ")"
   else:
-    result = a.snippet
+    result = a.r
 
 proc byRefLoc(p: BProc; a: TLoc): Rope =
   if lfIndirect notin a.flags and mapType(p.config, a.t, mapTypeChooser(a) == skParam) != ctArray and not
       p.module.compileToCpp:
-    result = "(&" & a.snippet & ")"
+    result = "(&" & a.r & ")"
   else:
-    result = a.snippet
+    result = a.r
 
 proc rdCharLoc(a: TLoc): Rope =
   # read a location that may need a char-cast:
@@ -412,9 +402,6 @@ proc rdCharLoc(a: TLoc): Rope =
 type
   TAssignmentFlag = enum
     needToCopy
-    needToCopySinkParam
-    needTempForOpenArray
-    needAssignCall
   TAssignmentFlags = set[TAssignmentFlag]
 
 proc genObjConstr(p: BProc, e: PNode, d: var TLoc)
@@ -483,12 +470,9 @@ include ccgreset
 proc resetLoc(p: BProc, loc: var TLoc) =
   let containsGcRef = optSeqDestructors notin p.config.globalOptions and containsGarbageCollectedRef(loc.t)
   let typ = skipTypes(loc.t, abstractVarRange)
-  if isImportedCppType(typ): 
-    var didGenTemp = false
-    linefmt(p, cpsStmts, "$1 = $2;$n", [rdLoc(loc), genCppInitializer(p.module, p, typ, didGenTemp)])
-    return
+  if isImportedCppType(typ): return
   if optSeqDestructors in p.config.globalOptions and typ.kind in {tyString, tySequence}:
-    assert loc.snippet != ""
+    assert loc.r != ""
 
     let atyp = skipTypes(loc.t, abstractInst)
     if atyp.kind in {tyVar, tyLent}:
@@ -498,7 +482,7 @@ proc resetLoc(p: BProc, loc: var TLoc) =
   elif not isComplexValueType(typ):
     if containsGcRef:
       var nilLoc: TLoc = initLoc(locTemp, loc.lode, OnStack)
-      nilLoc.snippet = rope("NIM_NIL")
+      nilLoc.r = rope("NIM_NIL")
       genRefAssign(p, loc, nilLoc)
     else:
       linefmt(p, cpsStmts, "$1 = 0;$n", [rdLoc(loc)])
@@ -514,17 +498,9 @@ proc resetLoc(p: BProc, loc: var TLoc) =
     else:
       # array passed as argument decayed into pointer, bug #7332
       # so we use getTypeDesc here rather than rdLoc(loc)
-      let tyDesc = getTypeDesc(p.module, loc.t, descKindFromSymKind mapTypeChooser(loc))
-      if p.module.compileToCpp and isOrHasImportedCppType(typ):
-        if lfIndirect in loc.flags:
-          #C++ cant be just zeroed. We need to call the ctors
-          var tmp = getTemp(p, loc.t)
-          linefmt(p, cpsStmts,"#nimCopyMem((void*)$1, (NIM_CONST void*)$2, sizeof($3));$n",
-                  [addrLoc(p.config, loc), addrLoc(p.config, tmp), tyDesc])
-      else:
-        linefmt(p, cpsStmts, "#nimZeroMem((void*)$1, sizeof($2));$n",
-                [addrLoc(p.config, loc), tyDesc])
-
+      linefmt(p, cpsStmts, "#nimZeroMem((void*)$1, sizeof($2));$n",
+              [addrLoc(p.config, loc),
+              getTypeDesc(p.module, loc.t, descKindFromSymKind mapTypeChooser(loc))])
       # XXX: We can be extra clever here and call memset only
       # on the bytes following the m_type field?
       genObjectInit(p, cpsStmts, loc.t, loc, constructObj)
@@ -536,13 +512,13 @@ proc constructLoc(p: BProc, loc: var TLoc, isTemp = false) =
   elif not isComplexValueType(typ):
     if containsGarbageCollectedRef(loc.t):
       var nilLoc: TLoc = initLoc(locTemp, loc.lode, OnStack)
-      nilLoc.snippet = rope("NIM_NIL")
+      nilLoc.r = rope("NIM_NIL")
       genRefAssign(p, loc, nilLoc)
     else:
       linefmt(p, cpsStmts, "$1 = ($2)0;$n", [rdLoc(loc),
         getTypeDesc(p.module, typ, descKindFromSymKind mapTypeChooser(loc))])
   else:
-    if (not isTemp or containsGarbageCollectedRef(loc.t)) and not hasNoInit(loc.t):
+    if not isTemp or containsGarbageCollectedRef(loc.t):
       # don't use nimZeroMem for temporary values for performance if we can
       # avoid it:
       if not isOrHasImportedCppType(typ):
@@ -564,14 +540,12 @@ proc initLocalVar(p: BProc, v: PSym, immediateAsgn: bool) =
 
 proc getTemp(p: BProc, t: PType, needsInit=false): TLoc =
   inc(p.labels)
-  result = TLoc(snippet: "T" & rope(p.labels) & "_", k: locTemp, lode: lodeTyp t,
+  result = TLoc(r: "T" & rope(p.labels) & "_", k: locTemp, lode: lodeTyp t,
                 storage: OnStack, flags: {})
   if p.module.compileToCpp and isOrHasImportedCppType(t):
-    var didGenTemp = false
-    linefmt(p, cpsLocals, "$1 $2$3;$n", [getTypeDesc(p.module, t, dkVar), result.snippet,
-      genCppInitializer(p.module, p, t, didGenTemp)])
+    linefmt(p, cpsLocals, "$1 $2{};$n", [getTypeDesc(p.module, t, dkVar), result.r])
   else:
-    linefmt(p, cpsLocals, "$1 $2;$n", [getTypeDesc(p.module, t, dkVar), result.snippet])
+    linefmt(p, cpsLocals, "$1 $2;$n", [getTypeDesc(p.module, t, dkVar), result.r])
   constructLoc(p, result, not needsInit)
   when false:
     # XXX Introduce a compiler switch in order to detect these easily.
@@ -584,16 +558,16 @@ proc getTemp(p: BProc, t: PType, needsInit=false): TLoc =
 
 proc getTempCpp(p: BProc, t: PType, value: Rope): TLoc =
   inc(p.labels)
-  result = TLoc(snippet: "T" & rope(p.labels) & "_", k: locTemp, lode: lodeTyp t,
+  result = TLoc(r: "T" & rope(p.labels) & "_", k: locTemp, lode: lodeTyp t,
                 storage: OnStack, flags: {})
-  linefmt(p, cpsStmts, "auto $1 = $2;$n", [result.snippet, value])
+  linefmt(p, cpsStmts, "$1 $2 = $3;$n", [getTypeDesc(p.module, t, dkVar), result.r, value])
 
 proc getIntTemp(p: BProc): TLoc =
   inc(p.labels)
-  result = TLoc(snippet: "T" & rope(p.labels) & "_", k: locTemp,
+  result = TLoc(r: "T" & rope(p.labels) & "_", k: locTemp,
                 storage: OnStack, lode: lodeTyp getSysType(p.module.g.graph, unknownLineInfo, tyInt),
                 flags: {})
-  linefmt(p, cpsLocals, "NI $1;$n", [result.snippet])
+  linefmt(p, cpsLocals, "NI $1;$n", [result.r])
 
 proc localVarDecl(p: BProc; n: PNode): Rope =
   result = ""
@@ -615,20 +589,16 @@ proc localVarDecl(p: BProc; n: PNode): Rope =
     if sfVolatile in s.flags: result.add(" volatile")
     if sfNoalias in s.flags: result.add(" NIM_NOALIAS")
     result.add(" ")
-    result.add(s.loc.snippet)
+    result.add(s.loc.r)
   else:
-    result = runtimeFormat(s.cgDeclFrmt, [result, s.loc.snippet])
+    result = runtimeFormat(s.cgDeclFrmt, [result, s.loc.r])
 
 proc assignLocalVar(p: BProc, n: PNode) =
   #assert(s.loc.k == locNone) # not yet assigned
   # this need not be fulfilled for inline procs; they are regenerated
   # for each module that uses them!
   let nl = if optLineDir in p.config.options: "" else: "\n"
-  var decl = localVarDecl(p, n)
-  if p.module.compileToCpp and isOrHasImportedCppType(n.typ):
-    var didGenTemp = false
-    decl.add genCppInitializer(p.module, p, n.typ, didGenTemp)
-  decl.add ";" & nl
+  let decl = localVarDecl(p, n) & (if p.module.compileToCpp and isOrHasImportedCppType(n.typ): "{};" else: ";") & nl
   line(p, cpsLocals, decl)
 
 include ccgthreadvars
@@ -658,11 +628,22 @@ proc genGlobalVarDecl(p: BProc, n: PNode; td, value: Rope; decl: var Rope) =
     if sfNoalias in s.flags: decl.add(" NIM_NOALIAS")
   else:
     if value != "":
-      decl = runtimeFormat(s.cgDeclFrmt & " = $#;$n", [td, s.loc.snippet, value])
+      decl = runtimeFormat(s.cgDeclFrmt & " = $#;$n", [td, s.loc.r, value])
     else:
-      decl = runtimeFormat(s.cgDeclFrmt & ";$n", [td, s.loc.snippet])
+      decl = runtimeFormat(s.cgDeclFrmt & ";$n", [td, s.loc.r])
 
-proc genCppVarForCtor(p: BProc; call: PNode; decl: var Rope; didGenTemp: var bool)
+proc genCppVarForCtor(p: BProc, v: PSym; vn, value: PNode; decl: var Rope)
+
+proc callGlobalVarCppCtor(p: BProc; v: PSym; vn, value: PNode) =
+  let s = vn.sym
+  fillBackendName(p.module, s)
+  fillLoc(s.loc, locGlobalVar, vn, OnHeap)
+  var decl: Rope = ""
+  let td = getTypeDesc(p.module, vn.sym.typ, dkVar)
+  genGlobalVarDecl(p, vn, td, "", decl)
+  decl.add " " & $s.loc.r
+  genCppVarForCtor(p, v, vn, value, decl)
+  p.module.s[cfsVars].add decl
 
 proc assignGlobalVar(p: BProc, n: PNode; value: Rope) =
   let s = n.sym
@@ -676,7 +657,7 @@ proc assignGlobalVar(p: BProc, n: PNode; value: Rope) =
     if q != nil and not containsOrIncl(q.declaredThings, s.id):
       varInDynamicLib(q, s)
     else:
-      s.loc.snippet = mangleDynLibProc(s)
+      s.loc.r = mangleDynLibProc(s)
     if value != "":
       internalError(p.config, n.info, ".dynlib variables cannot have a value")
     return
@@ -707,31 +688,19 @@ proc assignGlobalVar(p: BProc, n: PNode; value: Rope) =
             # [^0]: https://en.cppreference.com/w/cpp/language/aggregate_initialization
             # [^1]: https://cplusplus.github.io/CWG/issues/1518.html
             # [^2]: https://eel.is/c++draft/over.match.ctor
-            decl.addf(" $1;$n", [s.loc.snippet])
+            decl.addf(" $1;$n", [s.loc.r])
           else:
-            decl.addf(" $1 = $2;$n", [s.loc.snippet, value])
+            decl.addf(" $1 = $2;$n", [s.loc.r, value])
         else:
-          decl.addf(" $1;$n", [s.loc.snippet])
+          decl.addf(" $1;$n", [s.loc.r])
 
       p.module.s[cfsVars].add(decl)
   if p.withinLoop > 0 and value == "":
     # fixes tests/run/tzeroarray:
     resetLoc(p, s.loc)
 
-proc callGlobalVarCppCtor(p: BProc; v: PSym; vn, value: PNode; didGenTemp: var bool) =
-  let s = vn.sym
-  fillBackendName(p.module, s)
-  fillLoc(s.loc, locGlobalVar, vn, OnHeap)
-  var decl: Rope = ""
-  let td = getTypeDesc(p.module, vn.sym.typ, dkVar)
-  genGlobalVarDecl(p, vn, td, "", decl)
-  decl.add " " & $s.loc.snippet
-  genCppVarForCtor(p, value, decl, didGenTemp)
-  if didGenTemp:  return # generated in the caller
-  p.module.s[cfsVars].add decl
-
 proc assignParam(p: BProc, s: PSym, retType: PType) =
-  assert(s.loc.snippet != "")
+  assert(s.loc.r != "")
   scopeMangledParam(p, s)
 
 proc fillProcLoc(m: BModule; n: PNode) =
@@ -751,13 +720,12 @@ proc genVarPrototype(m: BModule, n: PNode)
 proc requestConstImpl(p: BProc, sym: PSym)
 proc genStmts(p: BProc, t: PNode)
 proc expr(p: BProc, n: PNode, d: var TLoc)
-
+proc genProcPrototype(m: BModule, sym: PSym)
 proc putLocIntoDest(p: BProc, d: var TLoc, s: TLoc)
 proc intLiteral(i: BiggestInt; result: var Rope)
 proc genLiteral(p: BProc, n: PNode; result: var Rope)
 proc genOtherArg(p: BProc; ri: PNode; i: int; typ: PType; result: var Rope; argsCounter: var int)
 proc raiseExit(p: BProc)
-proc raiseExitCleanup(p: BProc, destroy: string)
 
 proc initLocExpr(p: BProc, e: PNode, flags: TLocFlags = {}): TLoc =
   result = initLoc(locNone, e, OnUnknown, flags)
@@ -784,11 +752,15 @@ $1define nimfr_(proc, file) \
   TFrame FR_; \
   FR_.procname = proc; FR_.filename = file; FR_.line = 0; FR_.len = 0; #nimFrame(&FR_);
 
-$1define nimln_(n) \
-  FR_.line = n;
+  $1define nimfrs_(proc, file, slots, length) \
+    struct {TFrame* prev;NCSTRING procname;NI line;NCSTRING filename;NI len;VarSlot s[slots];} FR_; \
+    FR_.procname = proc; FR_.filename = file; FR_.line = 0; FR_.len = length; #nimFrame((TFrame*)&FR_);
 
-$1define nimlf_(n, file) \
-  FR_.line = n; FR_.filename = file;
+  $1define nimln_(n) \
+    FR_.line = n;
+
+  $1define nimlf_(n, file) \
+    FR_.line = n; FR_.filename = file;
 
 """
   if p.module.s[cfsFrameDefines].len == 0:
@@ -852,7 +824,7 @@ proc loadDynamicLib(m: BModule, lib: PLib) =
       p.options.excl optStackTrace
       p.flags.incl nimErrorFlagDisabled
       var dest: TLoc = initLoc(locTemp, lib.path, OnStack)
-      dest.snippet = getTempName(m)
+      dest.r = getTempName(m)
       appcg(m, m.s[cfsDynLibInit],"$1 $2;$n",
            [getTypeDesc(m, lib.path.typ, dkVar), rdLoc(dest)])
       expr(p, lib.path, dest)
@@ -870,7 +842,7 @@ proc mangleDynLibProc(sym: PSym): Rope =
   # we have to build this as a single rope in order not to trip the
   # optimization in genInfixCall, see test tests/cpp/t8241.nim
   if sfCompilerProc in sym.flags:
-    # NOTE: sym.loc.snippet is the external name!
+    # NOTE: sym.loc.r is the external name!
     result = rope(sym.name.s)
   else:
     result = rope(strutils.`%`("Dl_$1_", $sym.id))
@@ -878,10 +850,10 @@ proc mangleDynLibProc(sym: PSym): Rope =
 proc symInDynamicLib(m: BModule, sym: PSym) =
   var lib = sym.annex
   let isCall = isGetProcAddr(lib)
-  var extname = sym.loc.snippet
+  var extname = sym.loc.r
   if not isCall: loadDynamicLib(m, lib)
   var tmp = mangleDynLibProc(sym)
-  sym.loc.snippet = tmp             # from now on we only need the internal name
+  sym.loc.r = tmp             # from now on we only need the internal name
   sym.typ.sym = nil           # generate a new name
   inc(m.labels, 2)
   if isCall:
@@ -908,24 +880,24 @@ proc symInDynamicLib(m: BModule, sym: PSym) =
     appcg(m, m.s[cfsDynLibInit],
         "\t$1 = ($2) #nimGetProcAddr($3, $4);$n",
         [tmp, getTypeDesc(m, sym.typ, dkVar), lib.name, makeCString($extname)])
-  m.s[cfsVars].addf("$2 $1;$n", [sym.loc.snippet, getTypeDesc(m, sym.loc.t, dkVar)])
+  m.s[cfsVars].addf("$2 $1;$n", [sym.loc.r, getTypeDesc(m, sym.loc.t, dkVar)])
 
 proc varInDynamicLib(m: BModule, sym: PSym) =
   var lib = sym.annex
-  var extname = sym.loc.snippet
+  var extname = sym.loc.r
   loadDynamicLib(m, lib)
   incl(sym.loc.flags, lfIndirect)
   var tmp = mangleDynLibProc(sym)
-  sym.loc.snippet = tmp             # from now on we only need the internal name
+  sym.loc.r = tmp             # from now on we only need the internal name
   inc(m.labels, 2)
   appcg(m, m.s[cfsDynLibInit],
       "$1 = ($2*) #nimGetProcAddr($3, $4);$n",
       [tmp, getTypeDesc(m, sym.typ, dkVar), lib.name, makeCString($extname)])
   m.s[cfsVars].addf("$2* $1;$n",
-      [sym.loc.snippet, getTypeDesc(m, sym.loc.t, dkVar)])
+      [sym.loc.r, getTypeDesc(m, sym.loc.t, dkVar)])
 
 proc symInDynamicLibPartial(m: BModule, sym: PSym) =
-  sym.loc.snippet = mangleDynLibProc(sym)
+  sym.loc.r = mangleDynLibProc(sym)
   sym.typ.sym = nil           # generate a new name
 
 proc cgsymImpl(m: BModule; sym: PSym) {.inline.} =
@@ -948,7 +920,7 @@ proc cgsymValue(m: BModule, name: string): Rope =
     cgsymImpl m, sym
   else:
     rawMessage(m.config, errGenerated, "system module needs: " & name)
-  result = sym.loc.snippet
+  result = sym.loc.r
   if m.hcrOn and sym != nil and sym.kind in {skProc..skIterator}:
     result.addActualSuffixForHCR(m.module, sym)
 
@@ -1004,19 +976,11 @@ proc closureSetup(p: BProc, prc: PSym) =
     linefmt(p, cpsStmts, "$1 = ($2) ClE_0;$n",
             [rdLoc(env.loc), getTypeDesc(p.module, env.typ)])
 
-const harmless = {nkConstSection, nkTypeSection, nkEmpty, nkCommentStmt, nkTemplateDef,
-                  nkMacroDef, nkMixinStmt, nkBindStmt, nkFormalParams} +
-                  declarativeDefs
-
 proc containsResult(n: PNode): bool =
   result = false
   case n.kind
-  of succ(nkEmpty)..pred(nkSym), succ(nkSym)..nkNilLit, harmless:
+  of nkEmpty..pred(nkSym), succ(nkSym)..nkNilLit, nkFormalParams:
     discard
-  of nkReturnStmt:
-    for i in 0..<n.len:
-      if containsResult(n[i]): return true
-    result = n.len > 0 and n[0].kind == nkEmpty
   of nkSym:
     if n.sym.kind == skResult:
       result = true
@@ -1024,6 +988,10 @@ proc containsResult(n: PNode): bool =
     for i in 0..<n.len:
       if containsResult(n[i]): return true
 
+const harmless = {nkConstSection, nkTypeSection, nkEmpty, nkCommentStmt, nkTemplateDef,
+                  nkMacroDef, nkMixinStmt, nkBindStmt, nkFormalParams} +
+                  declarativeDefs
+
 proc easyResultAsgn(n: PNode): PNode =
   result = nil
   case n.kind
@@ -1044,7 +1012,7 @@ proc easyResultAsgn(n: PNode): PNode =
 type
   InitResultEnum = enum Unknown, InitSkippable, InitRequired
 
-proc allPathsAsgnResult(p: BProc; n: PNode): InitResultEnum =
+proc allPathsAsgnResult(n: PNode): InitResultEnum =
   # Exceptions coming from calls don't have not be considered here:
   #
   # proc bar(): string = raise newException(...)
@@ -1059,7 +1027,7 @@ proc allPathsAsgnResult(p: BProc; n: PNode): InitResultEnum =
   #   echo "a was not written to"
   #
   template allPathsInBranch(it) =
-    let a = allPathsAsgnResult(p, it)
+    let a = allPathsAsgnResult(it)
     case a
     of InitRequired: return InitRequired
     of InitSkippable: discard
@@ -1071,20 +1039,14 @@ proc allPathsAsgnResult(p: BProc; n: PNode): InitResultEnum =
   case n.kind
   of nkStmtList, nkStmtListExpr:
     for it in n:
-      result = allPathsAsgnResult(p, it)
+      result = allPathsAsgnResult(it)
       if result != Unknown: return result
   of nkAsgn, nkFastAsgn, nkSinkAsgn:
     if n[0].kind == nkSym and n[0].sym.kind == skResult:
-      if not containsResult(n[1]):
-        if allPathsAsgnResult(p, n[1]) == InitRequired:
-          result = InitRequired
-        else:
-          result = InitSkippable
+      if not containsResult(n[1]): result = InitSkippable
       else: result = InitRequired
     elif containsResult(n):
       result = InitRequired
-    else:
-      result = allPathsAsgnResult(p, n[1])
   of nkReturnStmt:
     if n.len > 0:
       if n[0].kind == nkEmpty and result != InitSkippable:
@@ -1093,7 +1055,7 @@ proc allPathsAsgnResult(p: BProc; n: PNode): InitResultEnum =
         # initialized. This avoids cases like #9286 where this heuristic lead to
         # wrong code being generated.
         result = InitRequired
-      else: result = allPathsAsgnResult(p, n[0])
+      else: result = allPathsAsgnResult(n[0])
   of nkIfStmt, nkIfExpr:
     var exhaustive = false
     result = InitSkippable
@@ -1119,9 +1081,9 @@ proc allPathsAsgnResult(p: BProc; n: PNode): InitResultEnum =
   of nkWhileStmt:
     # some dubious code can assign the result in the 'while'
     # condition and that would be fine. Everything else isn't:
-    result = allPathsAsgnResult(p, n[0])
+    result = allPathsAsgnResult(n[0])
     if result == Unknown:
-      result = allPathsAsgnResult(p, n[1])
+      result = allPathsAsgnResult(n[1])
       # we cannot assume that the 'while' loop is really executed at least once:
       if result == InitSkippable: result = Unknown
   of harmless:
@@ -1146,21 +1108,9 @@ proc allPathsAsgnResult(p: BProc; n: PNode): InitResultEnum =
     allPathsInBranch(n[0])
     for i in 1..<n.len:
       if n[i].kind == nkFinally:
-        result = allPathsAsgnResult(p, n[i].lastSon)
+        result = allPathsAsgnResult(n[i].lastSon)
       else:
         allPathsInBranch(n[i].lastSon)
-  of nkCallKinds:
-    if canRaiseDisp(p, n[0]):
-      result = InitRequired
-    else:
-      for i in 0..<n.safeLen:
-        allPathsInBranch(n[i])
-  of nkRaiseStmt:
-    result = InitRequired
-  of nkChckRangeF, nkChckRange64, nkChckRange:
-    # TODO: more checks might need to be covered like overflow, indexDefect etc.
-    # bug #22852
-    result = InitRequired
   else:
     for i in 0..<n.safeLen:
       allPathsInBranch(n[i])
@@ -1194,14 +1144,14 @@ proc genProcAux*(m: BModule, prc: PSym) =
   var returnStmt: Rope = ""
   assert(prc.ast != nil)
 
-  var procBody = transformBody(m.g.graph, m.idgen, prc, {})
+  var procBody = transformBody(m.g.graph, m.idgen, prc, dontUseCache)
   if sfInjectDestructors in prc.flags:
     procBody = injectDestructorCalls(m.g.graph, m.idgen, prc, procBody)
 
   let tmpInfo = prc.info
   discard freshLineInfo(p, prc.info)
 
-  if sfPure notin prc.flags and prc.typ.returnType != nil:
+  if sfPure notin prc.flags and prc.typ[0] != nil:
     if resultPos >= prc.ast.len:
       internalError(m.config, prc.info, "proc has no result symbol")
     let resNode = prc.ast[resultPos]
@@ -1215,22 +1165,14 @@ proc genProcAux*(m: BModule, prc: PSym) =
       else:
         # declare the result symbol:
         assignLocalVar(p, resNode)
-        assert(res.loc.snippet != "")
-        if p.config.selectedGC in {gcArc, gcAtomicArc, gcOrc} and
-            allPathsAsgnResult(p, procBody) == InitSkippable:
-          # In an ideal world the codegen could rely on injectdestructors doing its job properly
-          # and then the analysis step would not be required.
-          discard "result init optimized out"
-        else:
-          initLocalVar(p, res, immediateAsgn=false)
+        assert(res.loc.r != "")
+        initLocalVar(p, res, immediateAsgn=false)
       returnStmt = ropecg(p.module, "\treturn $1;$n", [rdLoc(res.loc)])
     elif sfConstructor in prc.flags:
-      resNode.sym.loc.flags.incl lfIndirect
       fillLoc(resNode.sym.loc, locParam, resNode, "this", OnHeap)
-      prc.loc.snippet = getTypeDesc(m, resNode.sym.loc.t, dkVar)
     else:
       fillResult(p.config, resNode, prc.typ)
-      assignParam(p, res, prc.typ.returnType)
+      assignParam(p, res, prc.typ[0])
       # We simplify 'unsureAsgn(result, nil); unsureAsgn(result, x)'
       # to 'unsureAsgn(result, x)'
       # Sketch why this is correct: If 'result' points to a stack location
@@ -1238,7 +1180,7 @@ proc genProcAux*(m: BModule, prc: PSym) =
       # global is either 'nil' or points to valid memory and so the RC operation
       # succeeds without touching not-initialized memory.
       if sfNoInit in prc.flags: discard
-      elif allPathsAsgnResult(p, procBody) == InitSkippable: discard
+      elif allPathsAsgnResult(procBody) == InitSkippable: discard
       else:
         resetLoc(p, res.loc)
       if skipTypes(res.typ, abstractInst).kind == tyArray:
@@ -1248,7 +1190,7 @@ proc genProcAux*(m: BModule, prc: PSym) =
   for i in 1..<prc.typ.n.len:
     let param = prc.typ.n[i].sym
     if param.typ.isCompileTimeOnly: continue
-    assignParam(p, param, prc.typ.returnType)
+    assignParam(p, param, prc.typ[0])
   closureSetup(p, prc)
   genProcBody(p, procBody)
 
@@ -1292,7 +1234,7 @@ proc genProcAux*(m: BModule, prc: PSym) =
   m.s[cfsProcs].add(generatedProc)
   if isReloadable(m, prc):
     m.s[cfsDynLibInit].addf("\t$1 = ($3) hcrRegisterProc($4, \"$1\", (void*)$2);$n",
-         [prc.loc.snippet, prc.loc.snippet & "_actual", getProcTypeCast(m, prc), getModuleDllPath(m, prc)])
+         [prc.loc.r, prc.loc.r & "_actual", getProcTypeCast(m, prc), getModuleDllPath(m, prc)])
 
 proc requiresExternC(m: BModule; sym: PSym): bool {.inline.} =
   result = (sfCompileToCpp in m.module.flags and
@@ -1352,7 +1294,7 @@ proc genProcNoForward(m: BModule, prc: PSym) =
       # the hcr dynlib (also put it in the DynLibInit section - right after it gets loaded)
       if isReloadable(q, prc):
         q.s[cfsDynLibInit].addf("\t$1 = ($2) hcrRegisterProc($3, \"$1\", (void*)$1);$n",
-            [prc.loc.snippet, getTypeDesc(q, prc.loc.t), getModuleDllPath(m, q.module)])
+            [prc.loc.r, getTypeDesc(q, prc.loc.t), getModuleDllPath(m, q.module)])
     else:
       symInDynamicLibPartial(m, prc)
   elif prc.typ.callConv == ccInline:
@@ -1369,8 +1311,8 @@ proc genProcNoForward(m: BModule, prc: PSym) =
       #elif {sfExportc, sfImportc} * prc.flags == {}:
       #  # reset name to restore consistency in case of hashing collisions:
       #  echo "resetting ", prc.id, " by ", m.module.name.s
-      #  prc.loc.snippet = nil
-      #  prc.loc.snippet = mangleName(m, prc)
+      #  prc.loc.r = nil
+      #  prc.loc.r = mangleName(m, prc)
       genProcPrototype(m, prc)
       genProcAux(m, prc)
   elif sfImportc notin prc.flags:
@@ -1382,7 +1324,7 @@ proc genProcNoForward(m: BModule, prc: PSym) =
     if isReloadable(m, prc) and prc.id notin m.declaredProtos and
       q != nil and q.module.id != m.module.id:
       m.s[cfsDynLibInit].addf("\t$1 = ($2) hcrGetProc($3, \"$1\");$n",
-           [prc.loc.snippet, getProcTypeCast(m, prc), getModuleDllPath(m, prc)])
+           [prc.loc.r, getProcTypeCast(m, prc), getModuleDllPath(m, prc)])
     genProcPrototype(m, prc)
     if q != nil and not containsOrIncl(q.declaredThings, prc.id):
       # make sure there is a "prototype" in the external module
@@ -1435,7 +1377,7 @@ proc genVarPrototype(m: BModule, n: PNode) =
     return
   if sym.owner.id != m.module.id:
     # else we already have the symbol generated!
-    assert(sym.loc.snippet != "")
+    assert(sym.loc.r != "")
     incl(m.declaredThings, sym.id)
     if sfThread in sym.flags:
       declareThreadVar(m, sym, true)
@@ -1449,9 +1391,9 @@ proc genVarPrototype(m: BModule, n: PNode) =
       if sfRegister in sym.flags: m.s[cfsVars].add(" register")
       if sfVolatile in sym.flags: m.s[cfsVars].add(" volatile")
       if sfNoalias in sym.flags: m.s[cfsVars].add(" NIM_NOALIAS")
-      m.s[cfsVars].addf(" $1;$n", [sym.loc.snippet])
+      m.s[cfsVars].addf(" $1;$n", [sym.loc.r])
       if m.hcrOn: m.initProc.procSec(cpsLocals).addf(
-        "\t$1 = ($2*)hcrGetGlobal($3, \"$1\");$n", [sym.loc.snippet,
+        "\t$1 = ($2*)hcrGetGlobal($3, \"$1\");$n", [sym.loc.r,
         getTypeDesc(m, sym.loc.t, dkVar), getModuleDllPath(m, sym)])
 
 proc addNimDefines(result: var Rope; conf: ConfigRef) {.inline.} =
@@ -1484,13 +1426,15 @@ proc getFileHeader(conf: ConfigRef; cfile: Cfile): Rope =
 
 proc getSomeNameForModule(conf: ConfigRef, filename: AbsoluteFile): Rope =
   ## Returns a mangled module name.
-  result = mangleModuleName(conf, filename).mangle
+  result = ""
+  result.add mangleModuleName(conf, filename).mangle
 
 proc getSomeNameForModule(m: BModule): Rope =
   ## Returns a mangled module name.
   assert m.module.kind == skModule
   assert m.module.owner.kind == skPackage
-  result = mangleModuleName(m.g.config, m.filename).mangle
+  result = ""
+  result.add mangleModuleName(m.g.config, m.filename).mangle
 
 proc getSomeInitName(m: BModule, suffix: string): Rope =
   if not m.hcrOn:
@@ -1826,7 +1770,7 @@ proc genDatInitCode(m: BModule) =
 
   # we don't want to break into such init code - could happen if a line
   # directive from a function written by the user spills after itself
-  genCLineDir(prc, InvalidFileIdx, 999999, m.config)
+  genCLineDir(prc, "generated_not_to_break_here", 999999, m.config)
 
   for i in cfsTypeInit1..cfsDynLibInit:
     if m.s[i].len != 0:
@@ -1848,11 +1792,11 @@ proc hcrGetProcLoadCode(m: BModule, sym, prefix, handle, getProcFunc: string): R
 
   var extname = prefix & sym
   var tmp = mangleDynLibProc(prc)
-  prc.loc.snippet = tmp
+  prc.loc.r = tmp
   prc.typ.sym = nil
 
   if not containsOrIncl(m.declaredThings, prc.id):
-    m.s[cfsVars].addf("static $2 $1;$n", [prc.loc.snippet, getTypeDesc(m, prc.loc.t, dkVar)])
+    m.s[cfsVars].addf("static $2 $1;$n", [prc.loc.r, getTypeDesc(m, prc.loc.t, dkVar)])
 
   result = "\t$1 = ($2) $3($4, $5);$n" %
       [tmp, getTypeDesc(m, prc.typ, dkVar), getProcFunc.rope, handle.rope, makeCString(prefix & sym)]
@@ -1867,7 +1811,7 @@ proc genInitCode(m: BModule) =
     [rope(if m.hcrOn: "N_LIB_EXPORT" else: "N_LIB_PRIVATE"), initname]
   # we don't want to break into such init code - could happen if a line
   # directive from a function written by the user spills after itself
-  genCLineDir(prc, InvalidFileIdx, 999999, m.config)
+  genCLineDir(prc, "generated_not_to_break_here", 999999, m.config)
   if m.typeNodes > 0:
     if m.hcrOn:
       appcg(m, m.s[cfsTypeInit1], "\t#TNimNode* $1;$N", [m.typeNodesName])
@@ -1937,6 +1881,9 @@ proc genInitCode(m: BModule) =
 
     if optStackTrace in m.initProc.options and preventStackTrace notin m.flags:
       prc.add(deinitFrame(m.initProc))
+  elif m.config.exc == excGoto:
+    if getCompilerProc(m.g.graph, "nimTestErrorFlag") != nil:
+      m.appcg(prc, "\t#nimTestErrorFlag();$n", [])
 
   prc.addf("}$N", [])
 
@@ -1979,40 +1926,6 @@ proc genInitCode(m: BModule) =
 
   registerModuleToMain(m.g, m)
 
-proc postprocessCode(conf: ConfigRef, r: var Rope) =
-  # find the first directive
-  var f = r.find(postprocessDirStart)
-  if f == -1:
-    return
-
-  var
-    nimlnDirLastF = ""
-
-  var res: Rope = r.substr(0, f - 1)
-  while f != -1:
-    var
-      e = r.find(postprocessDirEnd, f + 1)
-      dir = r.substr(f + 1, e - 1).split(postprocessDirSep)
-    case dir[0]
-    of "nimln":
-      if dir[2] == nimlnDirLastF:
-        res.add("nimln_(" & dir[1] & ");")
-      else:
-        res.add("nimlf_(" & dir[1] & ", " & quotedFilename(conf, dir[2].parseInt.FileIndex) & ");")
-        nimlnDirLastF = dir[2]
-    else:
-      raiseAssert "unexpected postprocess directive"
-
-    # find the next directive
-    f = r.find(postprocessDirStart, e + 1)
-    # copy the code until the next directive
-    if f != -1:
-      res.add(r.substr(e + 1, f - 1))
-    else:
-      res.add(r.substr(e + 1))
-
-  r = res
-
 proc genModule(m: BModule, cfile: Cfile): Rope =
   var moduleIsEmpty = true
 
@@ -2041,17 +1954,9 @@ proc genModule(m: BModule, cfile: Cfile): Rope =
   if m.config.cppCustomNamespace.len > 0:
     closeNamespaceNim(result)
 
-  if optLineDir in m.config.options:
-    var srcFileDefs = ""
-    for fi in 0..m.config.m.fileInfos.high:
-      srcFileDefs.add("#define FX_" & $fi & " " & makeSingleLineCString(toFullPath(m.config, fi.FileIndex)) & "\n")
-    result = srcFileDefs & result
-
   if moduleIsEmpty:
     result = ""
 
-  postprocessCode(m.config, result)
-
 proc initProcOptions(m: BModule): TOptions =
   let opts = m.config.options
   if sfSystemModule in m.module.flags: opts-{optStackTrace} else: opts
@@ -2251,24 +2156,9 @@ proc updateCachedModule(m: BModule) =
   cf.flags = {CfileFlag.Cached}
   addFileToCompile(m.config, cf)
 
-proc generateLibraryDestroyGlobals(graph: ModuleGraph; m: BModule; body: PNode; isDynlib: bool): PSym =
-  let procname = getIdent(graph.cache, "NimDestroyGlobals")
-  result = newSym(skProc, procname, m.idgen, m.module.owner, m.module.info)
-  result.typ = newProcType(m.module.info, m.idgen, m.module.owner)
-  result.typ.callConv = ccCDecl
-  incl result.flags, sfExportc
-  result.loc.snippet = "NimDestroyGlobals"
-  if isDynlib:
-    incl(result.loc.flags, lfExportLib)
-
-  let theProc = newNodeI(nkProcDef, m.module.info, bodyPos+1)
-  for i in 0..<theProc.len: theProc[i] = newNodeI(nkEmpty, m.module.info)
-  theProc[namePos] = newSymNode(result)
-  theProc[bodyPos] = body
-  result.ast = theProc
-
-proc finalCodegenActions*(graph: ModuleGraph; m: BModule; n: PNode) =
+proc finalCodegenActions*(graph: ModuleGraph; m: BModule; n: PNode): PNode =
   ## Also called from IC.
+  result = nil
   if sfMainModule in m.module.flags:
     # phase ordering problem here: We need to announce this
     # dependency to 'nimTestErrorFlag' before system.c has been written to disk.
@@ -2278,13 +2168,6 @@ proc finalCodegenActions*(graph: ModuleGraph; m: BModule; n: PNode) =
     if {optGenStaticLib, optGenDynLib, optNoMain} * m.config.globalOptions == {}:
       for i in countdown(high(graph.globalDestructors), 0):
         n.add graph.globalDestructors[i]
-    else:
-      var body = newNodeI(nkStmtList, m.module.info)
-      for i in countdown(high(graph.globalDestructors), 0):
-        body.add graph.globalDestructors[i]
-      body.flags.incl nfTransf # should not be further transformed
-      let dtor = generateLibraryDestroyGlobals(graph, m, body, optGenDynLib in m.config.globalOptions)
-      genProcAux(m, dtor)
   if pipelineutils.skipCodegen(m.config, n): return
   if moduleHasChanged(graph, m.module):
     # if the module is cached, we don't regenerate the main proc
@@ -2323,11 +2206,7 @@ proc finalCodegenActions*(graph: ModuleGraph; m: BModule; n: PNode) =
 
       if m.g.forwardedProcs.len == 0:
         incl m.flags, objHasKidsValid
-      if optMultiMethods in m.g.config.globalOptions or
-          m.g.config.selectedGC notin {gcArc, gcOrc, gcAtomicArc} or
-          vtables notin m.g.config.features:
-        generateIfMethodDispatchers(graph, m.idgen)
-
+      result = generateMethodDispatchers(graph, m.idgen)
 
   let mm = m
   m.g.modulesClosed.add mm

compiler/cgendata.nim

@@ -10,10 +10,8 @@
 ## This module contains the data structures for the C code generation phase.
 
 import
-  ast, ropes, options,
-  ndi, lineinfos, pathutils, modulegraphs
-
-import std/[intsets, tables, sets]
+  ast, ropes, options, intsets,
+  tables, ndi, lineinfos, pathutils, modulegraphs, sets
 
 type
   TLabel* = Rope              # for the C generator a label is just a rope
@@ -88,7 +86,7 @@ type
     options*: TOptions        # options that should be used for code
                               # generation; this is the same as prc.options
                               # unless prc == nil
-    optionsStack*: seq[(TOptions, TNoteKinds)]
+    optionsStack*: seq[TOptions]
     module*: BModule          # used to prevent excessive parameter passing
     withinLoop*: int          # > 0 if we are within a loop
     splitDecls*: int          # > 0 if we are in some context for C++ that
@@ -137,7 +135,6 @@ type
                             # unconditionally...
                             # nimtvDeps is VERY hard to cache because it's
                             # not a list of IDs nor can it be made to be one.
-    mangledPrcs*: HashSet[string]
 
   TCGen = object of PPassContext # represents a C source file
     s*: TCFileSections        # sections of the C file
@@ -151,7 +148,7 @@ type
     typeABICache*: HashSet[SigHash] # cache for ABI checks; reusing typeCache
                               # would be ideal but for some reason enums
                               # don't seem to get cached so it'd generate
-                              # 1 ABI check per occurrence in code
+                              # 1 ABI check per occurence in code
     forwTypeCache*: TypeCache # cache for forward declarations of types
     declaredThings*: IntSet   # things we have declared in this .c file
     declaredProtos*: IntSet   # prototypes we have declared in this .c file

compiler/cgmeth.nim

@@ -10,15 +10,12 @@
 ## This module implements code generation for methods.
 
 import
-  options, ast, msgs, idents, renderer, types, magicsys,
-  sempass2, modulegraphs, lineinfos, astalgo
-
-import std/intsets
+  intsets, options, ast, msgs, idents, renderer, types, magicsys,
+  sempass2, modulegraphs, lineinfos
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
 
-import std/[tables]
 
 proc genConv(n: PNode, d: PType, downcast: bool; conf: ConfigRef): PNode =
   var dest = skipTypes(d, abstractPtrs)
@@ -69,23 +66,21 @@ type
 proc sameMethodBucket(a, b: PSym; multiMethods: bool): MethodResult =
   result = No
   if a.name.id != b.name.id: return
-  if a.typ.signatureLen != b.typ.signatureLen:
+  if a.typ.len != b.typ.len:
     return
 
-  var i = 0
-  for x, y in paramTypePairs(a.typ, b.typ):
-    inc i
-    var aa = x
-    var bb = y
+  for i in 1..<a.typ.len:
+    var aa = a.typ[i]
+    var bb = b.typ[i]
     while true:
       aa = skipTypes(aa, {tyGenericInst, tyAlias})
       bb = skipTypes(bb, {tyGenericInst, tyAlias})
       if aa.kind == bb.kind and aa.kind in {tyVar, tyPtr, tyRef, tyLent, tySink}:
-        aa = aa.elementType
-        bb = bb.elementType
+        aa = aa.lastSon
+        bb = bb.lastSon
       else:
         break
-    if sameType(x, y):
+    if sameType(a.typ[i], b.typ[i]):
       if aa.kind == tyObject and result != Invalid:
         result = Yes
     elif aa.kind == tyObject and bb.kind == tyObject and (i == 1 or multiMethods):
@@ -103,11 +98,10 @@ proc sameMethodBucket(a, b: PSym; multiMethods: bool): MethodResult =
       return No
   if result == Yes:
     # check for return type:
-    # ignore flags of return types; # bug #22673
-    if not sameTypeOrNil(a.typ.returnType, b.typ.returnType, {IgnoreFlags}):
-      if b.typ.returnType != nil and b.typ.returnType.kind == tyUntyped:
+    if not sameTypeOrNil(a.typ[0], b.typ[0]):
+      if b.typ[0] != nil and b.typ[0].kind == tyUntyped:
         # infer 'auto' from the base to make it consistent:
-        b.typ.setReturnType a.typ.returnType
+        b.typ[0] = a.typ[0]
       else:
         return No
 
@@ -126,15 +120,15 @@ proc createDispatcher(s: PSym; g: ModuleGraph; idgen: IdGenerator): PSym =
   incl(disp.flags, sfDispatcher)
   excl(disp.flags, sfExported)
   let old = disp.typ
-  disp.typ = copyType(disp.typ, idgen, disp.typ.owner)
+  disp.typ = copyType(disp.typ, nextTypeId(idgen), disp.typ.owner)
   copyTypeProps(g, idgen.module, disp.typ, old)
 
   # we can't inline the dispatcher itself (for now):
   if disp.typ.callConv == ccInline: disp.typ.callConv = ccNimCall
   disp.ast = copyTree(s.ast)
   disp.ast[bodyPos] = newNodeI(nkEmpty, s.info)
-  disp.loc.snippet = ""
-  if s.typ.returnType != nil:
+  disp.loc.r = ""
+  if s.typ[0] != nil:
     if disp.ast.len > resultPos:
       disp.ast[resultPos].sym = copySym(s.ast[resultPos].sym, idgen)
     else:
@@ -159,14 +153,6 @@ proc fixupDispatcher(meth, disp: PSym; conf: ConfigRef) =
 
 proc methodDef*(g: ModuleGraph; idgen: IdGenerator; s: PSym) =
   var witness: PSym = nil
-  if s.typ.firstParamType.owner.getModule != s.getModule and vtables in g.config.features and not
-      g.config.isDefined("nimInternalNonVtablesTesting"):
-    localError(g.config, s.info, errGenerated, "method `" & s.name.s &
-          "` can be defined only in the same module with its type (" & s.typ.firstParamType.typeToString() & ")")
-  if sfImportc in s.flags:
-    localError(g.config, s.info, errGenerated, "method `" & s.name.s &
-          "` is not allowed to have 'importc' pragmas")
-
   for i in 0..<g.methods.len:
     let disp = g.methods[i].dispatcher
     case sameMethodBucket(disp, s, multimethods = optMultiMethods in g.config.globalOptions)
@@ -185,11 +171,6 @@ proc methodDef*(g: ModuleGraph; idgen: IdGenerator; s: PSym) =
     of Invalid:
       if witness.isNil: witness = g.methods[i].methods[0]
   # create a new dispatcher:
-  # stores the id and the position
-  if s.typ.firstParamType.skipTypes(skipPtrs).itemId notin g.bucketTable:
-    g.bucketTable[s.typ.firstParamType.skipTypes(skipPtrs).itemId] = 1
-  else:
-    g.bucketTable.inc(s.typ.firstParamType.skipTypes(skipPtrs).itemId)
   g.methods.add((methods: @[s], dispatcher: createDispatcher(s, g, idgen)))
   #echo "adding ", s.info
   if witness != nil:
@@ -198,7 +179,7 @@ proc methodDef*(g: ModuleGraph; idgen: IdGenerator; s: PSym) =
   elif sfBase notin s.flags:
     message(g.config, s.info, warnUseBase)
 
-proc relevantCol*(methods: seq[PSym], col: int): bool =
+proc relevantCol(methods: seq[PSym], col: int): bool =
   # returns true iff the position is relevant
   result = false
   var t = methods[0].typ[col].skipTypes(skipPtrs)
@@ -210,7 +191,7 @@ proc relevantCol*(methods: seq[PSym], col: int): bool =
 
 proc cmpSignatures(a, b: PSym, relevantCols: IntSet): int =
   result = 0
-  for col in FirstParamAt..<a.typ.signatureLen:
+  for col in 1..<a.typ.len:
     if contains(relevantCols, col):
       var aa = skipTypes(a.typ[col], skipPtrs)
       var bb = skipTypes(b.typ[col], skipPtrs)
@@ -218,7 +199,7 @@ proc cmpSignatures(a, b: PSym, relevantCols: IntSet): int =
       if (d != high(int)) and d != 0:
         return d
 
-proc sortBucket*(a: var seq[PSym], relevantCols: IntSet) =
+proc sortBucket(a: var seq[PSym], relevantCols: IntSet) =
   # we use shellsort here; fast and simple
   var n = a.len
   var h = 1
@@ -237,16 +218,16 @@ proc sortBucket*(a: var seq[PSym], relevantCols: IntSet) =
       a[j] = v
     if h == 1: break
 
-proc genIfDispatcher*(g: ModuleGraph; methods: seq[PSym], relevantCols: IntSet; idgen: IdGenerator): PSym =
+proc genDispatcher(g: ModuleGraph; methods: seq[PSym], relevantCols: IntSet; idgen: IdGenerator): PSym =
   var base = methods[0].ast[dispatcherPos].sym
   result = base
-  var paramLen = base.typ.signatureLen
+  var paramLen = base.typ.len
   var nilchecks = newNodeI(nkStmtList, base.info)
   var disp = newNodeI(nkIfStmt, base.info)
   var ands = getSysMagic(g, unknownLineInfo, "and", mAnd)
   var iss = getSysMagic(g, unknownLineInfo, "of", mOf)
   let boolType = getSysType(g, unknownLineInfo, tyBool)
-  for col in FirstParamAt..<paramLen:
+  for col in 1..<paramLen:
     if contains(relevantCols, col):
       let param = base.typ.n[col].sym
       if param.typ.skipTypes(abstractInst).kind in {tyRef, tyPtr}:
@@ -255,7 +236,7 @@ proc genIfDispatcher*(g: ModuleGraph; methods: seq[PSym], relevantCols: IntSet;
   for meth in 0..high(methods):
     var curr = methods[meth]      # generate condition:
     var cond: PNode = nil
-    for col in FirstParamAt..<paramLen:
+    for col in 1..<paramLen:
       if contains(relevantCols, col):
         var isn = newNodeIT(nkCall, base.info, boolType)
         isn.add newSymNode(iss)
@@ -270,7 +251,7 @@ proc genIfDispatcher*(g: ModuleGraph; methods: seq[PSym], relevantCols: IntSet;
           cond = a
         else:
           cond = isn
-    let retTyp = base.typ.returnType
+    let retTyp = base.typ[0]
     let call = newNodeIT(nkCall, base.info, retTyp)
     call.add newSymNode(curr)
     for col in 1..<paramLen:
@@ -296,13 +277,14 @@ proc genIfDispatcher*(g: ModuleGraph; methods: seq[PSym], relevantCols: IntSet;
   nilchecks.flags.incl nfTransf # should not be further transformed
   result.ast[bodyPos] = nilchecks
 
-proc generateIfMethodDispatchers*(g: ModuleGraph, idgen: IdGenerator) =
+proc generateMethodDispatchers*(g: ModuleGraph, idgen: IdGenerator): PNode =
+  result = newNode(nkStmtList)
   for bucket in 0..<g.methods.len:
     var relevantCols = initIntSet()
-    for col in FirstParamAt..<g.methods[bucket].methods[0].typ.signatureLen:
+    for col in 1..<g.methods[bucket].methods[0].typ.len:
       if relevantCol(g.methods[bucket].methods, col): incl(relevantCols, col)
       if optMultiMethods notin g.config.globalOptions:
         # if multi-methods are not enabled, we are interested only in the first field
         break
     sortBucket(g.methods[bucket].methods, relevantCols)
-    g.addDispatchers genIfDispatcher(g, g.methods[bucket].methods, relevantCols, idgen)
+    result.add newSymNode(genDispatcher(g, g.methods[bucket].methods, relevantCols, idgen))

compiler/closureiters.nim

@@ -18,8 +18,7 @@
 #    dec a
 #
 # Should be transformed to:
-#  case :state
-#  of 0:
+#  STATE0:
 #    if a > 0:
 #      echo "hi"
 #      :state = 1 # Next state
@@ -27,14 +26,19 @@
 #    else:
 #      :state = 2 # Next state
 #      break :stateLoop # Proceed to the next state
-#  of 1:
+#  STATE1:
 #    dec a
 #    :state = 0 # Next state
 #    break :stateLoop # Proceed to the next state
-#  of 2:
+#  STATE2:
 #    :state = -1 # End of execution
-#  else:
-#    return
+
+# The transformation should play well with lambdalifting, however depending
+# on situation, it can be called either before or after lambdalifting
+# transformation. As such we behave slightly differently, when accessing
+# iterator state, or using temp variables. If lambdalifting did not happen,
+# we just create local variables, so that they will be lifted further on.
+# Otherwise, we utilize existing env, created by lambdalifting.
 
 # Lambdalifting treats :state variable specially, it should always end up
 # as the first field in env. Currently C codegen depends on this behavior.
@@ -100,13 +104,12 @@
 # Is transformed to (yields are left in place for example simplicity,
 #    in reality the code is subdivided even more, as described above):
 #
-# case :state
-# of 0: # Try
+# STATE0: # Try
 #   yield 0
 #   raise ...
 #   :state = 2 # What would happen should we not raise
 #   break :stateLoop
-# of 1: # Except
+# STATE1: # Except
 #   yield 1
 #   :tmpResult = 3           # Return
 #   :unrollFinally = true # Return
@@ -114,7 +117,7 @@
 #   break :stateLoop
 #   :state = 2 # What would happen should we not return
 #   break :stateLoop
-# of 2: # Finally
+# STATE2: # Finally
 #   yield 2
 #   if :unrollFinally: # This node is created by `newEndFinallyNode`
 #     if :curExc.isNil:
@@ -127,15 +130,11 @@
 #       raise
 #   state = -1 # Goto next state. In this case we just exit
 #   break :stateLoop
-# else:
-#   return
 
 import
   ast, msgs, idents,
   renderer, magicsys, lowerings, lambdalifting, modulegraphs, lineinfos,
-  options
-
-import std/tables
+  tables, options
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -144,11 +143,12 @@ type
   Ctx = object
     g: ModuleGraph
     fn: PSym
+    stateVarSym: PSym # :state variable. nil if env already introduced by lambdalifting
     tmpResultSym: PSym # Used when we return, but finally has to interfere
     unrollFinallySym: PSym # Indicates that we're unrolling finally states (either exception happened or premature return)
     curExcSym: PSym # Current exception
 
-    states: seq[tuple[label: int, body: PNode]] # The resulting states.
+    states: seq[PNode] # The resulting states. Every state is an nkState node.
     blockLevel: int # Temp used to transform break and continue stmts
     stateLoopLabel: PSym # Label to break on, when jumping between states.
     exitStateIdx: int # index of the last state
@@ -160,23 +160,15 @@ type
     nearestFinally: int # Index of the nearest finally block. For try/except it
                     # is their finally. For finally it is parent finally. Otherwise -1
     idgen: IdGenerator
-    varStates: Table[ItemId, int] # Used to detect if local variable belongs to multiple states
-    stateVarSym: PSym # :state variable. nil if env already introduced by lambdalifting
-      # remove if -d:nimOptIters is default, treating it as always nil
-    nimOptItersEnabled: bool # tracks if -d:nimOptIters is enabled
-      # should be default when issues are fixed, see #24094
 
 const
   nkSkip = {nkEmpty..nkNilLit, nkTemplateDef, nkTypeSection, nkStaticStmt,
             nkCommentStmt, nkMixinStmt, nkBindStmt} + procDefs
-  emptyStateLabel = -1
-  localNotSeen = -1
-  localRequiresLifting = -2
 
 proc newStateAccess(ctx: var Ctx): PNode =
   if ctx.stateVarSym.isNil:
     result = rawIndirectAccess(newSymNode(getEnvParam(ctx.fn)),
-      getStateField(ctx.g, ctx.fn), ctx.fn.info)
+        getStateField(ctx.g, ctx.fn), ctx.fn.info)
   else:
     result = newSymNode(ctx.stateVarSym)
 
@@ -193,8 +185,7 @@ proc newStateAssgn(ctx: var Ctx, stateNo: int = -2): PNode =
 proc newEnvVar(ctx: var Ctx, name: string, typ: PType): PSym =
   result = newSym(skVar, getIdent(ctx.g.cache, name), ctx.idgen, ctx.fn, ctx.fn.info)
   result.typ = typ
-  result.flags.incl sfNoInit
-  assert(not typ.isNil, "Env var needs a type")
+  assert(not typ.isNil)
 
   if not ctx.stateVarSym.isNil:
     # We haven't gone through labmda lifting yet, so just create a local var,
@@ -205,7 +196,7 @@ proc newEnvVar(ctx: var Ctx, name: string, typ: PType): PSym =
   else:
     let envParam = getEnvParam(ctx.fn)
     # let obj = envParam.typ.lastSon
-    result = addUniqueField(envParam.typ.elementType, result, ctx.g.cache, ctx.idgen)
+    result = addUniqueField(envParam.typ.lastSon, result, ctx.g.cache, ctx.idgen)
 
 proc newEnvVarAccess(ctx: Ctx, s: PSym): PNode =
   if ctx.stateVarSym.isNil:
@@ -213,12 +204,9 @@ proc newEnvVarAccess(ctx: Ctx, s: PSym): PNode =
   else:
     result = newSymNode(s)
 
-proc newTempVarAccess(ctx: Ctx, s: PSym): PNode =
-  result = newSymNode(s, ctx.fn.info)
-
 proc newTmpResultAccess(ctx: var Ctx): PNode =
   if ctx.tmpResultSym.isNil:
-    ctx.tmpResultSym = ctx.newEnvVar(":tmpResult", ctx.fn.typ.returnType)
+    ctx.tmpResultSym = ctx.newEnvVar(":tmpResult", ctx.fn.typ[0])
   ctx.newEnvVarAccess(ctx.tmpResultSym)
 
 proc newUnrollFinallyAccess(ctx: var Ctx, info: TLineInfo): PNode =
@@ -238,7 +226,10 @@ proc newState(ctx: var Ctx, n, gotoOut: PNode): int =
 
   result = ctx.states.len
   let resLit = ctx.g.newIntLit(n.info, result)
-  ctx.states.add((result, n))
+  let s = newNodeI(nkState, n.info)
+  s.add(resLit)
+  s.add(n)
+  ctx.states.add(s)
   ctx.exceptionTable.add(ctx.curExcHandlingState)
 
   if not gotoOut.isNil:
@@ -257,26 +248,9 @@ proc addGotoOut(n: PNode, gotoOut: PNode): PNode =
   if result.len == 0 or result[^1].kind != nkGotoState:
     result.add(gotoOut)
 
-proc newTempVarDef(ctx: Ctx, s: PSym, initialValue: PNode): PNode =
-  var v = initialValue
-  if v == nil:
-    v = ctx.g.emptyNode
-  newTree(nkVarSection, newTree(nkIdentDefs, newSymNode(s), ctx.g.emptyNode, v))
-
-proc newEnvVarAsgn(ctx: Ctx, s: PSym, v: PNode): PNode
-
-proc newTempVar(ctx: var Ctx, typ: PType, parent: PNode, initialValue: PNode = nil): PSym =
-  if ctx.nimOptItersEnabled:
-    result = newSym(skVar, getIdent(ctx.g.cache, ":tmpSlLower" & $ctx.tempVarId), ctx.idgen, ctx.fn, ctx.fn.info)
-  else:
-    result = ctx.newEnvVar(":tmpSlLower" & $ctx.tempVarId, typ)
+proc newTempVar(ctx: var Ctx, typ: PType): PSym =
+  result = ctx.newEnvVar(":tmpSlLower" & $ctx.tempVarId, typ)
   inc ctx.tempVarId
-  result.typ = typ
-  assert(not typ.isNil, "Temp var needs a type")
-  if ctx.nimOptItersEnabled:
-    parent.add(ctx.newTempVarDef(result, initialValue))
-  elif initialValue != nil:
-    parent.add(ctx.newEnvVarAsgn(result, initialValue))
 
 proc hasYields(n: PNode): bool =
   # TODO: This is very inefficient. It traverses the node, looking for nkYieldStmt.
@@ -287,8 +261,8 @@ proc hasYields(n: PNode): bool =
     result = false
   else:
     result = false
-    for i in ord(n.kind == nkCast)..<n.len:
-      if n[i].hasYields:
+    for c in n:
+      if c.hasYields:
         result = true
         break
 
@@ -437,7 +411,7 @@ proc hasYieldsInExpressions(n: PNode): bool =
 
 proc exprToStmtList(n: PNode): tuple[s, res: PNode] =
   assert(n.kind == nkStmtListExpr)
-  result = (newNodeI(nkStmtList, n.info), nil)
+  result.s = newNodeI(nkStmtList, n.info)
   result.s.sons = @[]
 
   var n = n
@@ -448,15 +422,8 @@ proc exprToStmtList(n: PNode): tuple[s, res: PNode] =
 
   result.res = n
 
-proc newTempVarAsgn(ctx: Ctx, s: PSym, v: PNode): PNode =
-  if isEmptyType(v.typ):
-    result = v
-  else:
-    result = newTree(nkFastAsgn, ctx.newTempVarAccess(s), v)
-    result.info = v.info
 
 proc newEnvVarAsgn(ctx: Ctx, s: PSym, v: PNode): PNode =
-  # unused with -d:nimOptIters
   if isEmptyType(v.typ):
     result = v
   else:
@@ -464,13 +431,10 @@ proc newEnvVarAsgn(ctx: Ctx, s: PSym, v: PNode): PNode =
     result.info = v.info
 
 proc addExprAssgn(ctx: Ctx, output, input: PNode, sym: PSym) =
-  var input = input
   if input.kind == nkStmtListExpr:
     let (st, res) = exprToStmtList(input)
     output.add(st)
-    input = res
-  if ctx.nimOptItersEnabled:
-    output.add(ctx.newTempVarAsgn(sym, input))
+    output.add(ctx.newEnvVarAsgn(sym, res))
   else:
     output.add(ctx.newEnvVarAsgn(sym, input))
 
@@ -482,16 +446,6 @@ proc newNotCall(g: ModuleGraph; e: PNode): PNode =
   result = newTree(nkCall, newSymNode(g.getSysMagic(e.info, "not", mNot), e.info), e)
   result.typ = g.getSysType(e.info, tyBool)
 
-proc boolLit(g: ModuleGraph; info: TLineInfo; value: bool): PNode =
-  result = newIntLit(g, info, ord value)
-  result.typ = getSysType(g, info, tyBool)
-
-proc captureVar(c: var Ctx, s: PSym) =
-  if c.varStates.getOrDefault(s.itemId) != localRequiresLifting:
-    c.varStates[s.itemId] = localRequiresLifting # Mark this variable for lifting
-    let e = getEnvParam(c.fn)
-    discard addField(e.typ.elementType, s, c.g.cache, c.idgen)
-
 proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
   result = n
   case n.kind
@@ -548,9 +502,9 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
       var tmp: PSym = nil
       let isExpr = not isEmptyType(n.typ)
       if isExpr:
+        tmp = ctx.newTempVar(n.typ)
         result = newNodeI(nkStmtListExpr, n.info)
         result.typ = n.typ
-        tmp = ctx.newTempVar(n.typ, result)
       else:
         result = newNodeI(nkStmtList, n.info)
 
@@ -601,11 +555,7 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
         else:
           internalError(ctx.g.config, "lowerStmtListExpr(nkIf): " & $branch.kind)
 
-      if isExpr:
-        if ctx.nimOptItersEnabled:
-          result.add(ctx.newTempVarAccess(tmp))
-        else:
-          result.add(ctx.newEnvVarAccess(tmp))
+      if isExpr: result.add(ctx.newEnvVarAccess(tmp))
 
   of nkTryStmt, nkHiddenTryStmt:
     var ns = false
@@ -619,7 +569,7 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
       if isExpr:
         result = newNodeI(nkStmtListExpr, n.info)
         result.typ = n.typ
-        let tmp = ctx.newTempVar(n.typ, result)
+        let tmp = ctx.newTempVar(n.typ)
 
         n[0] = ctx.convertExprBodyToAsgn(n[0], tmp)
         for i in 1..<n.len:
@@ -635,10 +585,7 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
           else:
             internalError(ctx.g.config, "lowerStmtListExpr(nkTryStmt): " & $branch.kind)
         result.add(n)
-        if ctx.nimOptItersEnabled:
-          result.add(ctx.newTempVarAccess(tmp))
-        else:
-          result.add(ctx.newEnvVarAccess(tmp))
+        result.add(ctx.newEnvVarAccess(tmp))
 
   of nkCaseStmt:
     var ns = false
@@ -651,9 +598,9 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
       let isExpr = not isEmptyType(n.typ)
 
       if isExpr:
+        let tmp = ctx.newTempVar(n.typ)
         result = newNodeI(nkStmtListExpr, n.info)
         result.typ = n.typ
-        let tmp = ctx.newTempVar(n.typ, result)
 
         if n[0].kind == nkStmtListExpr:
           let (st, ex) = exprToStmtList(n[0])
@@ -670,10 +617,7 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
           else:
             internalError(ctx.g.config, "lowerStmtListExpr(nkCaseStmt): " & $branch.kind)
         result.add(n)
-        if ctx.nimOptItersEnabled:
-          result.add(ctx.newTempVarAccess(tmp))
-        else:
-          result.add(ctx.newEnvVarAccess(tmp))
+        result.add(ctx.newEnvVarAccess(tmp))
       elif n[0].kind == nkStmtListExpr:
         result = newNodeI(nkStmtList, n.info)
         let (st, ex) = exprToStmtList(n[0])
@@ -703,14 +647,10 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
           result.add(st)
           cond = ex
 
-        let tmp = ctx.newTempVar(cond.typ, result, cond)
-        # result.add(ctx.newTempVarAsgn(tmp, cond))
+        let tmp = ctx.newTempVar(cond.typ)
+        result.add(ctx.newEnvVarAsgn(tmp, cond))
 
-        var check: PNode
-        if ctx.nimOptItersEnabled:
-          check = ctx.newTempVarAccess(tmp)
-        else:
-          check = ctx.newEnvVarAccess(tmp)
+        var check = ctx.newEnvVarAccess(tmp)
         if n[0].sym.magic == mOr:
           check = ctx.g.newNotCall(check)
 
@@ -720,18 +660,12 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
           let (st, ex) = exprToStmtList(cond)
           ifBody.add(st)
           cond = ex
-        if ctx.nimOptItersEnabled:
-          ifBody.add(ctx.newTempVarAsgn(tmp, cond))
-        else:
-          ifBody.add(ctx.newEnvVarAsgn(tmp, cond))
+        ifBody.add(ctx.newEnvVarAsgn(tmp, cond))
 
         let ifBranch = newTree(nkElifBranch, check, ifBody)
         let ifNode = newTree(nkIfStmt, ifBranch)
         result.add(ifNode)
-        if ctx.nimOptItersEnabled:
-          result.add(ctx.newTempVarAccess(tmp))
-        else:
-          result.add(ctx.newEnvVarAccess(tmp))
+        result.add(ctx.newEnvVarAccess(tmp))
       else:
         for i in 0..<n.len:
           if n[i].kind == nkStmtListExpr:
@@ -740,12 +674,9 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
             n[i] = ex
 
           if n[i].kind in nkCallKinds: # XXX: This should better be some sort of side effect tracking
-            let tmp = ctx.newTempVar(n[i].typ, result, n[i])
-            # result.add(ctx.newTempVarAsgn(tmp, n[i]))
-            if ctx.nimOptItersEnabled:
-              n[i] = ctx.newTempVarAccess(tmp)
-            else:
-              n[i] = ctx.newEnvVarAccess(tmp)
+            let tmp = ctx.newTempVar(n[i].typ)
+            result.add(ctx.newEnvVarAsgn(tmp, n[i]))
+            n[i] = ctx.newEnvVarAccess(tmp)
 
         result.add(n)
 
@@ -761,12 +692,6 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
         let (st, ex) = exprToStmtList(c[^1])
         result.add(st)
         c[^1] = ex
-      for i in 0 .. c.len - 3:
-        if c[i].kind == nkSym:
-          let s = c[i].sym
-          if sfForceLift in s.flags:
-            ctx.captureVar(s)
-
       result.add(varSect)
 
   of nkDiscardStmt, nkReturnStmt, nkRaiseStmt:
@@ -852,7 +777,7 @@ proc lowerStmtListExprs(ctx: var Ctx, n: PNode, needsSplit: var bool): PNode =
         let check = newTree(nkIfStmt, branch)
         let newBody = newTree(nkStmtList, st, check, n[1])
 
-        n[0] = ctx.g.boolLit(n[0].info, true)
+        n[0] = newSymNode(ctx.g.getSysSym(n[0].info, "true"))
         n[1] = newBody
 
   of nkDotExpr, nkCheckedFieldExpr:
@@ -904,7 +829,7 @@ proc newEndFinallyNode(ctx: var Ctx, info: TLineInfo): PNode =
   let retStmt =
     if ctx.nearestFinally == 0:
       # last finally, we can return
-      let retValue = if ctx.fn.typ.returnType.isNil:
+      let retValue = if ctx.fn.typ[0].isNil:
                    ctx.g.emptyNode
                  else:
                    newTree(nkFastAsgn,
@@ -1206,10 +1131,10 @@ proc skipEmptyStates(ctx: Ctx, stateIdx: int): int =
     let label = stateIdx
     if label == ctx.exitStateIdx: break
     var newLabel = label
-    if label == emptyStateLabel:
+    if label == -1:
       newLabel = ctx.exitStateIdx
     else:
-      let fs = skipStmtList(ctx, ctx.states[label].body)
+      let fs = skipStmtList(ctx, ctx.states[label][1])
       if fs.kind == nkGotoState:
         newLabel = fs[0].intVal.int
     if label == newLabel: break
@@ -1218,7 +1143,7 @@ proc skipEmptyStates(ctx: Ctx, stateIdx: int): int =
     if maxJumps == 0:
       assert(false, "Internal error")
 
-  result = ctx.states[stateIdx].label
+  result = ctx.states[stateIdx][0].intVal.int
 
 proc skipThroughEmptyStates(ctx: var Ctx, n: PNode): PNode=
   result = n
@@ -1233,9 +1158,9 @@ proc skipThroughEmptyStates(ctx: var Ctx, n: PNode): PNode=
       n[i] = ctx.skipThroughEmptyStates(n[i])
 
 proc newArrayType(g: ModuleGraph; n: int, t: PType; idgen: IdGenerator; owner: PSym): PType =
-  result = newType(tyArray, idgen, owner)
+  result = newType(tyArray, nextTypeId(idgen), owner)
 
-  let rng = newType(tyRange, idgen, owner)
+  let rng = newType(tyRange, nextTypeId(idgen), owner)
   rng.n = newTree(nkRange, g.newIntLit(owner.info, 0), g.newIntLit(owner.info, n - 1))
   rng.rawAddSon(t)
 
@@ -1336,10 +1261,11 @@ proc wrapIntoTryExcept(ctx: var Ctx, n: PNode): PNode {.inline.} =
 proc wrapIntoStateLoop(ctx: var Ctx, n: PNode): PNode =
   # while true:
   #   block :stateLoop:
+  #     gotoState :state
   #     local vars decl (if needed)
   #     body # Might get wrapped in try-except
   let loopBody = newNodeI(nkStmtList, n.info)
-  result = newTree(nkWhileStmt, ctx.g.boolLit(n.info, true), loopBody)
+  result = newTree(nkWhileStmt, newSymNode(ctx.g.getSysSym(n.info, "true")), loopBody)
   result.info = n.info
 
   let localVars = newNodeI(nkStmtList, n.info)
@@ -1354,7 +1280,11 @@ proc wrapIntoStateLoop(ctx: var Ctx, n: PNode): PNode =
   let blockStmt = newNodeI(nkBlockStmt, n.info)
   blockStmt.add(newSymNode(ctx.stateLoopLabel))
 
-  var blockBody = newTree(nkStmtList, localVars, n)
+  let gs = newNodeI(nkGotoState, n.info)
+  gs.add(ctx.newStateAccess())
+  gs.add(ctx.g.newIntLit(n.info, ctx.states.len - 1))
+
+  var blockBody = newTree(nkStmtList, gs, localVars, n)
   if ctx.hasExceptions:
     blockBody = ctx.wrapIntoTryExcept(blockBody)
 
@@ -1367,28 +1297,29 @@ proc deleteEmptyStates(ctx: var Ctx) =
 
   # Apply new state indexes and mark unused states with -1
   var iValid = 0
-  for i, s in ctx.states.mpairs:
-    let body = skipStmtList(ctx, s.body)
+  for i, s in ctx.states:
+    let body = skipStmtList(ctx, s[1])
     if body.kind == nkGotoState and i != ctx.states.len - 1 and i != 0:
       # This is an empty state. Mark with -1.
-      s.label = emptyStateLabel
+      s[0].intVal = -1
     else:
-      s.label = iValid
+      s[0].intVal = iValid
       inc iValid
 
   for i, s in ctx.states:
-    let body = skipStmtList(ctx, s.body)
+    let body = skipStmtList(ctx, s[1])
     if body.kind != nkGotoState or i == 0:
-      discard ctx.skipThroughEmptyStates(s.body)
+      discard ctx.skipThroughEmptyStates(s)
       let excHandlState = ctx.exceptionTable[i]
       if excHandlState < 0:
         ctx.exceptionTable[i] = -ctx.skipEmptyStates(-excHandlState)
       elif excHandlState != 0:
         ctx.exceptionTable[i] = ctx.skipEmptyStates(excHandlState)
 
-  var i = 1 # ignore the entry and the exit
+  var i = 0
   while i < ctx.states.len - 1:
-    if ctx.states[i].label == emptyStateLabel:
+    let fs = skipStmtList(ctx, ctx.states[i][1])
+    if fs.kind == nkGotoState and i != 0:
       ctx.states.delete(i)
       ctx.exceptionTable.delete(i)
     else:
@@ -1497,77 +1428,18 @@ proc preprocess(c: var PreprocessContext; n: PNode): PNode =
     for i in 0 ..< n.len:
       result[i] = preprocess(c, n[i])
 
-proc detectCapturedVars(c: var Ctx, n: PNode, stateIdx: int) =
-  case n.kind
-  of nkSym:
-    let s = n.sym
-    if s.kind in {skResult, skVar, skLet, skForVar, skTemp} and sfGlobal notin s.flags and s.owner == c.fn:
-      let vs = c.varStates.getOrDefault(s.itemId, localNotSeen)
-      if vs == localNotSeen: # First seing this variable
-        c.varStates[s.itemId] = stateIdx
-      elif vs == localRequiresLifting:
-        discard # Sym already marked
-      elif vs != stateIdx:
-        c.captureVar(s)
-  of nkReturnStmt:
-    if n[0].kind in {nkAsgn, nkFastAsgn, nkSinkAsgn}:
-      # we have a `result = result` expression produced by the closure
-      # transform, let's not touch the LHS in order to make the lifting pass
-      # correct when `result` is lifted
-      detectCapturedVars(c, n[0][1], stateIdx)
-    else:
-      detectCapturedVars(c, n[0], stateIdx)
-  else:
-    for i in 0 ..< n.safeLen:
-      detectCapturedVars(c, n[i], stateIdx)
-
-proc detectCapturedVars(c: var Ctx) =
-  for i, s in c.states:
-    detectCapturedVars(c, s.body, i)
-
-proc liftLocals(c: var Ctx, n: PNode): PNode =
-  result = n
-  case n.kind
-  of nkSym:
-    let s = n.sym
-    if c.varStates.getOrDefault(s.itemId) == localRequiresLifting:
-      # lift
-      let e = getEnvParam(c.fn)
-      let field = getFieldFromObj(e.typ.elementType, s)
-      assert(field != nil)
-      result = rawIndirectAccess(newSymNode(e), field, n.info)
-    # elif c.varStates.getOrDefault(s.itemId, localNotSeen) != localNotSeen:
-    #   echo "Not lifting ", s.name.s
-
-  of nkReturnStmt:
-    if n[0].kind in {nkAsgn, nkFastAsgn, nkSinkAsgn}:
-      # we have a `result = result` expression produced by the closure
-      # transform, let's not touch the LHS in order to make the lifting pass
-      # correct when `result` is lifted
-      n[0][1] = liftLocals(c, n[0][1])
-    else:
-      n[0] = liftLocals(c, n[0])
-  else:
-    for i in 0 ..< n.safeLen:
-      n[i] = liftLocals(c, n[i])
-
 proc transformClosureIterator*(g: ModuleGraph; idgen: IdGenerator; fn: PSym, n: PNode): PNode =
-  var ctx = Ctx(g: g, fn: fn, idgen: idgen,
-    # should be default when issues are fixed, see #24094:
-    nimOptItersEnabled: isDefined(g.config, "nimOptIters"))
+  var ctx: Ctx
+  ctx.g = g
+  ctx.fn = fn
+  ctx.idgen = idgen
 
   if getEnvParam(fn).isNil:
-    if ctx.nimOptItersEnabled:
-      # The transformation should always happen after at least partial lambdalifting
-      # is performed, so that the closure iter environment is always created upfront.
-      doAssert(false, "Env param not created before iter transformation")
-    else:
-      # Lambda lifting was not done yet. Use temporary :state sym, which will
-      # be handled specially by lambda lifting. Local temp vars (if needed)
-      # should follow the same logic.
-      ctx.stateVarSym = newSym(skVar, getIdent(ctx.g.cache, ":state"), idgen, fn, fn.info)
-      ctx.stateVarSym.typ = g.createClosureIterStateType(fn, idgen)
-
+    # Lambda lifting was not done yet. Use temporary :state sym, which will
+    # be handled specially by lambda lifting. Local temp vars (if needed)
+    # should follow the same logic.
+    ctx.stateVarSym = newSym(skVar, getIdent(ctx.g.cache, ":state"), idgen, fn, fn.info)
+    ctx.stateVarSym.typ = g.createClosureIterStateType(fn, idgen)
   ctx.stateLoopLabel = newSym(skLabel, getIdent(ctx.g.cache, ":stateLoop"), idgen, fn, fn.info)
   var pc = PreprocessContext(finallys: @[], config: g.config, idgen: idgen)
   var n = preprocess(pc, n.toStmtList)
@@ -1589,23 +1461,17 @@ proc transformClosureIterator*(g: ModuleGraph; idgen: IdGenerator; fn: PSym, n:
   # Optimize empty states away
   ctx.deleteEmptyStates()
 
-  let caseDispatcher = newTreeI(nkCaseStmt, n.info,
-      ctx.newStateAccess())
-
-  if ctx.nimOptItersEnabled:
-    # Lamdalifting will not touch our locals, it is our responsibility to lift those that
-    # need it.
-    detectCapturedVars(ctx)
-
+  # Make new body by concatenating the list of states
+  result = newNodeI(nkStmtList, n.info)
   for s in ctx.states:
-    let body = ctx.transformStateAssignments(s.body)
-    caseDispatcher.add newTreeI(nkOfBranch, body.info, g.newIntLit(body.info, s.label), body)
+    assert(s.len == 2)
+    let body = s[1]
+    s.sons.del(1)
+    result.add(s)
+    result.add(body)
 
-  caseDispatcher.add newTreeI(nkElse, n.info, newTreeI(nkReturnStmt, n.info, g.emptyNode))
-
-  result = wrapIntoStateLoop(ctx, caseDispatcher)
-  if ctx.nimOptItersEnabled:
-    result = liftLocals(ctx, result)
+  result = ctx.transformStateAssignments(result)
+  result = ctx.wrapIntoStateLoop(result)
 
   when false:
     echo "TRANSFORM TO STATES: "
@@ -1614,5 +1480,3 @@ proc transformClosureIterator*(g: ModuleGraph; idgen: IdGenerator; fn: PSym, n:
     echo "exception table:"
     for i, e in ctx.exceptionTable:
       echo i, " -> ", e
-
-    echo "ENV: ", renderTree(getEnvParam(fn).typ.elementType.n)

compiler/cmdlinehelper.nim

@@ -11,9 +11,7 @@
 
 import
   options, idents, nimconf, extccomp, commands, msgs,
-  lineinfos, modulegraphs, condsyms, pathutils
-
-import std/[os, parseopt]
+  lineinfos, modulegraphs, condsyms, os, pathutils, parseopt
 
 proc prependCurDir*(f: AbsoluteFile): AbsoluteFile =
   when defined(unix):
@@ -57,11 +55,6 @@ proc loadConfigsAndProcessCmdLine*(self: NimProg, cache: IdentCache; conf: Confi
   if conf.cmd == cmdNimscript:
     incl(conf.globalOptions, optWasNimscript)
   loadConfigs(DefaultConfig, cache, conf, graph.idgen) # load all config files
-  # restores `conf.notes` after loading config files
-  # because it has overwrites the notes when compiling the system module which
-  # is a foreign module compared to the project
-  if conf.cmd in cmdBackends:
-    conf.notes = conf.mainPackageNotes
 
   if not self.suggestMode:
     let scriptFile = conf.projectFull.changeFileExt("nims")

compiler/commands.nim

@@ -24,12 +24,10 @@ bootSwitch(usedMarkAndSweep, defined(gcmarkandsweep), "--gc:markAndSweep")
 bootSwitch(usedGoGC, defined(gogc), "--gc:go")
 bootSwitch(usedNoGC, defined(nogc), "--gc:none")
 
-import std/[setutils, os, strutils, parseutils, parseopt, sequtils, strtabs, enumutils]
+import std/[setutils, os, strutils, parseutils, parseopt, sequtils, strtabs]
 import
   msgs, options, nversion, condsyms, extccomp, platform,
-  wordrecg, nimblecmd, lineinfos, pathutils
-
-import std/pathnorm
+  wordrecg, nimblecmd, lineinfos, pathutils, pathnorm
 
 from ast import setUseIc, eqTypeFlags, tfGcSafe, tfNoSideEffect
 
@@ -207,11 +205,7 @@ proc processSpecificNote*(arg: string, state: TSpecialWord, pass: TCmdLinePass,
     # unfortunately, hintUser and warningUser clash, otherwise implementation would simplify a bit
     let x = findStr(noteMin, noteMax, id, errUnknown)
     if x != errUnknown: notes = {TNoteKind(x)}
-    else:
-      if isSomeHint:
-        message(conf, info, hintUnknownHint, id)
-      else:
-        localError(conf, info, "unknown $#: $#" % [name, id])
+    else: localError(conf, info, "unknown $#: $#" % [name, id])
   case id.normalize
   of "all": # other note groups would be easy to support via additional cases
     notes = if isSomeHint: {hintMin..hintMax} else: {warnMin..warnMax}
@@ -248,7 +242,6 @@ const
   errNoneSpeedOrSizeExpectedButXFound = "'none', 'speed' or 'size' expected, but '$1' found"
   errGuiConsoleOrLibExpectedButXFound = "'gui', 'console', 'lib' or 'staticlib' expected, but '$1' found"
   errInvalidExceptionSystem = "'goto', 'setjmp', 'cpp' or 'quirky' expected, but '$1' found"
-  errInvalidFeatureButXFound = Feature.toSeq.map(proc(val:Feature): string = "'$1'" % $val).join(", ") & " expected, but '$1' found"
 
 template warningOptionNoop(switch: string) =
   warningDeprecated(conf, info, "'$#' is deprecated, now a noop" % switch)
@@ -304,12 +297,6 @@ proc testCompileOptionArg*(conf: ConfigRef; switch, arg: string, info: TLineInfo
     else:
       result = false
       localError(conf, info, errInvalidExceptionSystem % arg)
-  of "experimental":
-    try:
-      result = conf.features.contains parseEnum[Feature](arg)
-    except ValueError:
-      result = false
-      localError(conf, info, errInvalidFeatureButXFound % arg)
   else:
     result = false
     invalidCmdLineOption(conf, passCmd1, switch, info)
@@ -473,7 +460,6 @@ proc parseCommand*(command: string): Command =
   of "objc", "compiletooc": cmdCompileToOC
   of "js", "compiletojs": cmdCompileToJS
   of "r": cmdCrun
-  of "m": cmdM
   of "run": cmdTcc
   of "check": cmdCheck
   of "e": cmdNimscript
@@ -618,13 +604,6 @@ proc processMemoryManagementOption(switch, arg: string, pass: TCmdLinePass,
       defineSymbol(conf.symbols, "gcregions")
     else: localError(conf, info, errNoneBoehmRefcExpectedButXFound % arg)
 
-proc pathRelativeToConfig(arg: string, pass: TCmdLinePass, conf: ConfigRef): string =
-  if pass == passPP and not isAbsolute(arg):
-    assert isAbsolute(conf.currentConfigDir), "something is wrong with currentConfigDir"
-    result = conf.currentConfigDir / arg
-  else:
-    result = arg
-
 proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
                     conf: ConfigRef) =
   var key = ""
@@ -670,7 +649,7 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
     # refs bug #18674, otherwise `--os:windows` messes up with `--nimcache` set
     # in config nims files, e.g. via: `import os; switch("nimcache", "/tmp/somedir")`
     if conf.target.targetOS == osWindows and DirSep == '/': arg = arg.replace('\\', '/')
-    conf.nimcacheDir = processPath(conf, pathRelativeToConfig(arg, pass, conf), info, notRelativeToProj=true)
+    conf.nimcacheDir = processPath(conf, arg, info, notRelativeToProj=true)
   of "out", "o":
     expectArg(conf, switch, arg, pass, info)
     let f = splitFile(processPath(conf, arg, info, notRelativeToProj=true).string)
@@ -804,10 +783,7 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
     if conf.backend == backendJs or conf.cmd == cmdNimscript: discard
     else: processOnOffSwitchG(conf, {optThreads}, arg, pass, info)
     #if optThreads in conf.globalOptions: conf.setNote(warnGcUnsafe)
-  of "tlsemulation":
-    processOnOffSwitchG(conf, {optTlsEmulation}, arg, pass, info)
-    if optTlsEmulation in conf.globalOptions:
-      conf.legacyFeatures.incl emitGenerics
+  of "tlsemulation": processOnOffSwitchG(conf, {optTlsEmulation}, arg, pass, info)
   of "implicitstatic":
     processOnOffSwitch(conf, {optImplicitStatic}, arg, pass, info)
   of "patterns", "trmacros":
@@ -915,19 +891,15 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
       defineSymbol(conf.symbols, "nodejs")
   of "maxloopiterationsvm":
     expectArg(conf, switch, arg, pass, info)
-    var value: int = 10_000_000
-    discard parseSaturatedNatural(arg, value)
-    if not value > 0: localError(conf, info, "maxLoopIterationsVM must be a positive integer greater than zero")
-    conf.maxLoopIterationsVM = value
+    conf.maxLoopIterationsVM = parseInt(arg)
   of "errormax":
     expectArg(conf, switch, arg, pass, info)
     # Note: `nim check` (etc) can overwrite this.
     # `0` is meaningless, give it a useful meaning as in clang's -ferror-limit
     # If user doesn't set this flag and the code doesn't either, it'd
     # have the same effect as errorMax = 1
-    var value: int = 0
-    discard parseSaturatedNatural(arg, value)
-    conf.errorMax = if value == 0: high(int) else: value
+    let ret = parseInt(arg)
+    conf.errorMax = if ret == 0: high(int) else: ret
   of "verbosity":
     expectArg(conf, switch, arg, pass, info)
     let verbosity = parseInt(arg)
@@ -941,9 +913,7 @@ proc processSwitch*(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
     conf.mainPackageNotes = conf.notes
   of "parallelbuild":
     expectArg(conf, switch, arg, pass, info)
-    var value: int = 0
-    discard parseSaturatedNatural(arg, value)
-    conf.numberOfProcessors = value
+    conf.numberOfProcessors = parseInt(arg)
   of "version", "v":
     expectNoArg(conf, switch, arg, pass, info)
     writeVersionInfo(conf, pass)

compiler/concepts.nim

@@ -11,9 +11,9 @@
 ## for details. Note this is a first implementation and only the "Concept matching"
 ## section has been implemented.
 
-import ast, astalgo, semdata, lookups, lineinfos, idents, msgs, renderer, types
+import ast, astalgo, semdata, lookups, lineinfos, idents, msgs, renderer, types, intsets
 
-import std/intsets
+from magicsys import addSonSkipIntLit
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -28,11 +28,23 @@ proc declareSelf(c: PContext; info: TLineInfo) =
   ## Adds the magical 'Self' symbols to the current scope.
   let ow = getCurrOwner(c)
   let s = newSym(skType, getIdent(c.cache, "Self"), c.idgen, ow, info)
-  s.typ = newType(tyTypeDesc, c.idgen, ow)
+  s.typ = newType(tyTypeDesc, nextTypeId(c.idgen), ow)
   s.typ.flags.incl {tfUnresolved, tfPacked}
-  s.typ.add newType(tyEmpty, c.idgen, ow)
+  s.typ.add newType(tyEmpty, nextTypeId(c.idgen), ow)
   addDecl(c, s, info)
 
+proc isSelf*(t: PType): bool {.inline.} =
+  ## Is this the magical 'Self' type?
+  t.kind == tyTypeDesc and tfPacked in t.flags
+
+proc makeTypeDesc*(c: PContext, typ: PType): PType =
+  if typ.kind == tyTypeDesc and not isSelf(typ):
+    result = typ
+  else:
+    result = newTypeS(tyTypeDesc, c)
+    incl result.flags, tfCheckedForDestructor
+    result.addSonSkipIntLit(typ, c.idgen)
+
 proc semConceptDecl(c: PContext; n: PNode): PNode =
   ## Recursive helper for semantic checking for the concept declaration.
   ## Currently we only support (possibly empty) lists of statements
@@ -96,7 +108,7 @@ proc matchType(c: PContext; f, a: PType; m: var MatchCon): bool =
     ignorableForArgType = {tyVar, tySink, tyLent, tyOwned, tyGenericInst, tyAlias, tyInferred}
   case f.kind
   of tyAlias:
-    result = matchType(c, f.skipModifier, a, m)
+    result = matchType(c, f.lastSon, a, m)
   of tyTypeDesc:
     if isSelf(f):
       #let oldLen = m.inferred.len
@@ -105,19 +117,18 @@ proc matchType(c: PContext; f, a: PType; m: var MatchCon): bool =
       #m.inferred.setLen oldLen
       #echo "A for ", result, " to ", typeToString(a), " to ", typeToString(m.potentialImplementation)
     else:
-      if a.kind == tyTypeDesc and f.hasElementType == a.hasElementType:
-        if f.hasElementType:
-          result = matchType(c, f.elementType, a.elementType, m)
-        else:
-          result = true # both lack it
+      if a.kind == tyTypeDesc and f.len == a.len:
+        for i in 0..<a.len:
+          if not matchType(c, f[i], a[i], m): return false
+        return true
       else:
         result = false
 
   of tyGenericInvocation:
     result = false
-    if a.kind == tyGenericInst and a.genericHead.kind == tyGenericBody:
-      if sameType(f.genericHead, a.genericHead) and f.kidsLen == a.kidsLen-1:
-        for i in FirstGenericParamAt ..< f.kidsLen:
+    if a.kind == tyGenericInst and a[0].kind == tyGenericBody:
+      if sameType(f[0], a[0]) and f.len == a.len-1:
+        for i in 1 ..< f.len:
           if not matchType(c, f[i], a[i], m): return false
         return true
   of tyGenericParam:
@@ -127,17 +138,17 @@ proc matchType(c: PContext; f, a: PType; m: var MatchCon): bool =
     else:
       let old = existingBinding(m, f)
       if old == nil:
-        if f.hasElementType and f.elementType.kind != tyNone:
+        if f.len > 0 and f[0].kind != tyNone:
           # also check the generic's constraints:
           let oldLen = m.inferred.len
-          result = matchType(c, f.elementType, a, m)
+          result = matchType(c, f[0], a, m)
           m.inferred.setLen oldLen
           if result:
             when logBindings: echo "A adding ", f, " ", ak
             m.inferred.add((f, ak))
         elif m.magic == mArrGet and ak.kind in {tyArray, tyOpenArray, tySequence, tyVarargs, tyCstring, tyString}:
           when logBindings: echo "B adding ", f, " ", lastSon ak
-          m.inferred.add((f, last ak))
+          m.inferred.add((f, lastSon ak))
           result = true
         else:
           when logBindings: echo "C adding ", f, " ", ak
@@ -156,9 +167,9 @@ proc matchType(c: PContext; f, a: PType; m: var MatchCon): bool =
     # modifiers in the concept must be there in the actual implementation
     # too but not vice versa.
     if a.kind == f.kind:
-      result = matchType(c, f.elementType, a.elementType, m)
+      result = matchType(c, f[0], a[0], m)
     elif m.magic == mArrPut:
-      result = matchType(c, f.elementType, a, m)
+      result = matchType(c, f[0], a, m)
     else:
       result = false
   of tyEnum, tyObject, tyDistinct:
@@ -168,7 +179,7 @@ proc matchType(c: PContext; f, a: PType; m: var MatchCon): bool =
   of tyBool, tyChar, tyInt..tyUInt64:
     let ak = a.skipTypes(ignorableForArgType)
     result = ak.kind == f.kind or ak.kind == tyOrdinal or
-       (ak.kind == tyGenericParam and ak.hasElementType and ak.elementType.kind == tyOrdinal)
+       (ak.kind == tyGenericParam and ak.len > 0 and ak[0].kind == tyOrdinal)
   of tyConcept:
     let oldLen = m.inferred.len
     let oldPotentialImplementation = m.potentialImplementation
@@ -179,11 +190,10 @@ proc matchType(c: PContext; f, a: PType; m: var MatchCon): bool =
       m.inferred.setLen oldLen
   of tyArray, tyTuple, tyVarargs, tyOpenArray, tyRange, tySequence, tyRef, tyPtr,
      tyGenericInst:
-    # ^ XXX Rewrite this logic, it's more complex than it needs to be.
     result = false
     let ak = a.skipTypes(ignorableForArgType - {f.kind})
-    if ak.kind == f.kind and f.kidsLen == ak.kidsLen:
-      for i in 0..<ak.kidsLen:
+    if ak.kind == f.kind and f.len == ak.len:
+      for i in 0..<ak.len:
         if not matchType(c, f[i], ak[i], m): return false
       return true
   of tyOr:
@@ -192,30 +202,30 @@ proc matchType(c: PContext; f, a: PType; m: var MatchCon): bool =
       # say the concept requires 'int|float|string' if the potentialImplementation
       # says 'int|string' that is good enough.
       var covered = 0
-      for ff in f.kids:
-        for aa in a.kids:
+      for i in 0..<f.len:
+        for j in 0..<a.len:
           let oldLenB = m.inferred.len
-          let r = matchType(c, ff, aa, m)
+          let r = matchType(c, f[i], a[j], m)
           if r:
             inc covered
             break
           m.inferred.setLen oldLenB
 
-      result = covered >= a.kidsLen
+      result = covered >= a.len
       if not result:
         m.inferred.setLen oldLen
     else:
       result = false
-      for ff in f.kids:
-        result = matchType(c, ff, a, m)
+      for i in 0..<f.len:
+        result = matchType(c, f[i], a, m)
         if result: break # and remember the binding!
         m.inferred.setLen oldLen
   of tyNot:
     if a.kind == tyNot:
-      result = matchType(c, f.elementType, a.elementType, m)
+      result = matchType(c, f[0], a[0], m)
     else:
       let oldLen = m.inferred.len
-      result = not matchType(c, f.elementType, a, m)
+      result = not matchType(c, f[0], a, m)
       m.inferred.setLen oldLen
   of tyAnything:
     result = true
@@ -254,7 +264,7 @@ proc matchSym(c: PContext; candidate: PSym, n: PNode; m: var MatchCon): bool =
       m.inferred.setLen oldLen
       return false
 
-  if not matchReturnType(c, n[0].sym.typ.returnType, candidate.typ.returnType, m):
+  if not matchReturnType(c, n[0].sym.typ[0], candidate.typ[0], m):
     m.inferred.setLen oldLen
     return false
 
@@ -309,9 +319,9 @@ proc conceptMatchNode(c: PContext; n: PNode; m: var MatchCon): bool =
     # error was reported earlier.
     result = false
 
-proc conceptMatch*(c: PContext; concpt, arg: PType; bindings: var TypeMapping; invocation: PType): bool =
+proc conceptMatch*(c: PContext; concpt, arg: PType; bindings: var TIdTable; invocation: PType): bool =
   ## Entry point from sigmatch. 'concpt' is the concept we try to match (here still a PType but
-  ## we extract its AST via 'concpt.n.lastSon'). 'arg' is the type that might fulfill the
+  ## we extract its AST via 'concpt.n.lastSon'). 'arg' is the type that might fullfill the
   ## concept's requirements. If so, we return true and fill the 'bindings' with pairs of
   ## (typeVar, instance) pairs. ('typeVar' is usually simply written as a generic 'T'.)
   ## 'invocation' can be nil for atomic concepts. For non-atomic concepts, it contains the
@@ -336,8 +346,8 @@ proc conceptMatch*(c: PContext; concpt, arg: PType; bindings: var TypeMapping; i
     # we have a match, so bind 'arg' itself to 'concpt':
     bindings.idTablePut(concpt, arg)
     # invocation != nil means we have a non-atomic concept:
-    if invocation != nil and arg.kind == tyGenericInst and invocation.kidsLen == arg.kidsLen-1:
+    if invocation != nil and arg.kind == tyGenericInst and invocation.len == arg.len-1:
       # bind even more generic parameters
       assert invocation.kind == tyGenericInvocation
-      for i in FirstGenericParamAt ..< invocation.kidsLen:
+      for i in 1 ..< invocation.len:
         bindings.idTablePut(invocation[i], arg[i])

compiler/condsyms.nim

@@ -10,7 +10,7 @@
 # This module handles the conditional symbols.
 
 import
-  std/strtabs
+  strtabs
 
 from options import Feature
 from lineinfos import hintMin, hintMax, warnMin, warnMax
@@ -143,6 +143,7 @@ proc initDefines*(symbols: StringTableRef) =
   defineSymbol("nimHasTemplateRedefinitionPragma")
   defineSymbol("nimHasCstringCase")
   defineSymbol("nimHasCallsitePragma")
+  defineSymbol("nimHasAmbiguousEnumHint")
 
   defineSymbol("nimHasWarnCastSizes") # deadcode
   defineSymbol("nimHasOutParams")
@@ -157,15 +158,6 @@ proc initDefines*(symbols: StringTableRef) =
   defineSymbol("nimAllowNonVarDestructor")
   defineSymbol("nimHasQuirky")
   defineSymbol("nimHasEnsureMove")
-  defineSymbol("nimHasNoReturnError")
 
   defineSymbol("nimUseStrictDefs")
   defineSymbol("nimHasNolineTooLong")
-
-  defineSymbol("nimHasCastExtendedVm")
-  defineSymbol("nimHasWarnStdPrefix")
-
-  defineSymbol("nimHasVtables")
-  defineSymbol("nimHasGenericsOpenSym2")
-  defineSymbol("nimHasGenericsOpenSym3")
-  defineSymbol("nimHasJsNoLambdaLifting")

compiler/depends.nim

@@ -14,7 +14,7 @@ import options, ast, ropes, pathutils, msgs, lineinfos
 import modulegraphs
 
 import std/[os, parseutils]
-import std/strutils except addf
+import strutils except addf
 import std/private/globs
 
 when defined(nimPreviewSlimSystem):

compiler/dfa.nim

@@ -22,9 +22,8 @@
 ## "A Graph–Free Approach to Data–Flow Analysis" by Markus Mohnen.
 ## https://link.springer.com/content/pdf/10.1007/3-540-45937-5_6.pdf
 
-import ast, lineinfos, renderer, aliasanalysis
+import ast, intsets, lineinfos, renderer, aliasanalysis
 import std/private/asciitables
-import std/intsets
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -46,10 +45,10 @@ type
     case isTryBlock: bool
     of false:
       label: PSym
-      breakFixups: seq[(TPosition, seq[PNode])] # Contains the gotos for the breaks along with their pending finales
+      breakFixups: seq[(TPosition, seq[PNode])] #Contains the gotos for the breaks along with their pending finales
     of true:
       finale: PNode
-      raiseFixups: seq[TPosition] # Contains the gotos for the raises
+      raiseFixups: seq[TPosition] #Contains the gotos for the raises
 
   Con = object
     code: ControlFlowGraph
@@ -130,6 +129,10 @@ template withBlock(labl: PSym; body: untyped) =
   body
   popBlock(c, oldLen)
 
+proc isTrue(n: PNode): bool =
+  n.kind == nkSym and n.sym.kind == skEnumField and n.sym.position != 0 or
+    n.kind == nkIntLit and n.intVal != 0
+
 template forkT(body) =
   let lab1 = c.forkI()
   body
@@ -181,6 +184,14 @@ proc genIf(c: var Con, n: PNode) =
     goto Lend3
   L3:
     D
+    goto Lend3 # not eliminated to simplify the join generation
+  Lend3:
+    join F3
+  Lend2:
+    join F2
+  Lend:
+    join F1
+
   ]#
   var endings: seq[TPosition] = @[]
   let oldInteresting = c.interestingInstructions
@@ -205,6 +216,7 @@ proc genAndOr(c: var Con; n: PNode) =
   #   fork lab1
   #   asgn dest, b
   # lab1:
+  #   join F1
   c.gen(n[1])
   forkT:
     c.gen(n[2])
@@ -315,7 +327,7 @@ proc genRaise(c: var Con; n: PNode) =
       if c.blocks[i].isTryBlock:
         genBreakOrRaiseAux(c, i, n)
         return
-    assert false # Unreachable
+    assert false #Unreachable
   else:
     genNoReturn(c)
 
@@ -371,7 +383,7 @@ proc genCall(c: var Con; n: PNode) =
   if t != nil: t = t.skipTypes(abstractInst)
   for i in 1..<n.len:
     gen(c, n[i])
-    if t != nil and i < t.signatureLen and isOutParam(t[i]):
+    if t != nil and i < t.len and isOutParam(t[i]):
       # Pass by 'out' is a 'must def'. Good enough for a move optimizer.
       genDef(c, n[i])
   # every call can potentially raise:
@@ -381,6 +393,7 @@ proc genCall(c: var Con; n: PNode) =
     # fork lab1
     # goto exceptionHandler (except or finally)
     # lab1:
+    # join F1
     forkT:
       for i in countdown(c.blocks.high, 0):
         if c.blocks[i].isTryBlock:

compiler/docgen.nim

@@ -15,16 +15,15 @@
 ## For corresponding users' documentation see [Nim DocGen Tools Guide].
 
 import
-  ast, options, msgs, idents,
+  ast, strutils, strtabs, algorithm, sequtils, options, msgs, os, idents,
   wordrecg, syntaxes, renderer, lexer,
   packages/docutils/[rst, rstidx, rstgen, dochelpers],
-  trees, types,
-  typesrenderer, astalgo, lineinfos,
-  pathutils, nimpaths, renderverbatim, packages
+  json, xmltree, trees, types,
+  typesrenderer, astalgo, lineinfos, intsets,
+  pathutils, tables, nimpaths, renderverbatim, osproc, packages
 import packages/docutils/rstast except FileIndex, TLineInfo
 
-import std/[os, strutils, strtabs, algorithm, json, osproc, tables, intsets, xmltree, sequtils]
-from std/uri import encodeUrl
+from uri import encodeUrl
 from nodejs import findNodeJs
 
 when defined(nimPreviewSlimSystem):
@@ -289,7 +288,7 @@ template declareClosures(currentFilename: AbsoluteFile, destFile: string) =
     let outDirPath: RelativeFile =
         presentationPath(conf, AbsoluteFile(basedir / targetRelPath))
           # use presentationPath because `..` path can be be mangled to `_._`
-    result = (string(conf.outDir / outDirPath), "")
+    result.targetPath = string(conf.outDir / outDirPath)
     if not fileExists(result.targetPath):
       # this can happen if targetRelPath goes to parent directory `OUTDIR/..`.
       # Trying it, this may cause ambiguities, but allows us to insert
@@ -831,7 +830,7 @@ proc getName(n: PNode): string =
     result = "`"
     for i in 0..<n.len: result.add(getName(n[i]))
     result = "`"
-  of nkOpenSymChoice, nkClosedSymChoice, nkOpenSym:
+  of nkOpenSymChoice, nkClosedSymChoice:
     result = getName(n[0])
   else:
     result = ""
@@ -849,7 +848,7 @@ proc getNameIdent(cache: IdentCache; n: PNode): PIdent =
     var r = ""
     for i in 0..<n.len: r.add(getNameIdent(cache, n[i]).s)
     result = getIdent(cache, r)
-  of nkOpenSymChoice, nkClosedSymChoice, nkOpenSym:
+  of nkOpenSymChoice, nkClosedSymChoice:
     result = getNameIdent(cache, n[0])
   else:
     result = nil
@@ -863,7 +862,7 @@ proc getRstName(n: PNode): PRstNode =
   of nkAccQuoted:
     result = getRstName(n[0])
     for i in 1..<n.len: result.text.add(getRstName(n[i]).text)
-  of nkOpenSymChoice, nkClosedSymChoice, nkOpenSym:
+  of nkOpenSymChoice, nkClosedSymChoice:
     result = getRstName(n[0])
   else:
     result = nil
@@ -1000,9 +999,8 @@ proc getTypeKind(n: PNode): string =
 proc toLangSymbol(k: TSymKind, n: PNode, baseName: string): LangSymbol =
   ## Converts symbol info (names/types/parameters) in `n` into format
   ## `LangSymbol` convenient for ``rst.nim``/``dochelpers.nim``.
-  result = LangSymbol(name: baseName.nimIdentNormalize,
-      symKind: k.toHumanStr
-  )
+  result.name = baseName.nimIdentNormalize
+  result.symKind = k.toHumanStr
   if k in routineKinds:
     var
       paramTypes: seq[string] = @[]
@@ -1031,7 +1029,7 @@ proc toLangSymbol(k: TSymKind, n: PNode, baseName: string): LangSymbol =
     if genNode != nil:
       var literal = ""
       var r: TSrcGen = initTokRender(genNode, {renderNoBody, renderNoComments,
-        renderNoPragmas, renderNoProcDefs, renderExpandUsing, renderNoPostfix})
+        renderNoPragmas, renderNoProcDefs, renderExpandUsing})
       var kind = tkEof
       while true:
         getNextTok(r, kind, literal)
@@ -1059,7 +1057,7 @@ proc genItem(d: PDoc, n, nameNode: PNode, k: TSymKind, docFlags: DocFlags, nonEx
 
   # Obtain the plain rendered string for hyperlink titles.
   var r: TSrcGen = initTokRender(n, {renderNoBody, renderNoComments, renderDocComments,
-    renderNoPragmas, renderNoProcDefs, renderExpandUsing, renderNoPostfix})
+    renderNoPragmas, renderNoProcDefs, renderExpandUsing})
   while true:
     getNextTok(r, kind, literal)
     if kind == tkEof:
@@ -1086,9 +1084,6 @@ proc genItem(d: PDoc, n, nameNode: PNode, k: TSymKind, docFlags: DocFlags, nonEx
     symbolOrIdEnc = encodeUrl(symbolOrId, usePlus = false)
     deprecationMsg = genDeprecationMsg(d, pragmaNode)
     rstLangSymbol = toLangSymbol(k, n, cleanPlainSymbol)
-    symNameNode =
-      if nameNode.kind == nkPostfix: nameNode[1]
-      else: nameNode
 
   # we generate anchors automatically for subsequent use in doc comments
   let lineinfo = rstast.TLineInfo(
@@ -1099,10 +1094,10 @@ proc genItem(d: PDoc, n, nameNode: PNode, k: TSymKind, docFlags: DocFlags, nonEx
                priority = symbolPriority(k), info = lineinfo,
                module = addRstFileIndex(d, FileIndex d.module.position))
 
-  var renderFlags = {renderNoBody, renderNoComments, renderDocComments,
-    renderSyms, renderExpandUsing, renderNoPostfix}
-  if nonExports:
-    renderFlags.incl renderNonExportedFields
+  let renderFlags =
+    if nonExports: {renderNoBody, renderNoComments, renderDocComments, renderSyms,
+      renderExpandUsing, renderNonExportedFields}
+    else: {renderNoBody, renderNoComments, renderDocComments, renderSyms, renderExpandUsing}
   nodeToHighlightedHtml(d, n, result, renderFlags, symbolOrIdEnc)
 
   let seeSrc = genSeeSrc(d, toFullPath(d.conf, n.info), n.info.line.int)
@@ -1125,19 +1120,18 @@ proc genItem(d: PDoc, n, nameNode: PNode, k: TSymKind, docFlags: DocFlags, nonEx
   let external = d.destFile.AbsoluteFile.relativeTo(d.conf.outDir, '/').changeFileExt(HtmlExt).string
 
   var attype = ""
-  if k in routineKinds and symNameNode.kind == nkSym:
+  if k in routineKinds and nameNode.kind == nkSym:
     let att = attachToType(d, nameNode.sym)
     if att != nil:
       attype = esc(d.target, att.name.s)
-  elif k == skType and symNameNode.kind == nkSym and
-      symNameNode.sym.typ.kind in {tyEnum, tyBool}:
-    let etyp = symNameNode.sym.typ
+  elif k == skType and nameNode.kind == nkSym and nameNode.sym.typ.kind in {tyEnum, tyBool}:
+    let etyp = nameNode.sym.typ
     for e in etyp.n:
       if e.sym.kind != skEnumField: continue
       let plain = renderPlainSymbolName(e)
       let symbolOrId = d.newUniquePlainSymbol(plain)
       setIndexTerm(d[], ieNim, htmlFile = external, id = symbolOrId,
-                   term = plain, linkTitle = symNameNode.sym.name.s & '.' & plain,
+                   term = plain, linkTitle = nameNode.sym.name.s & '.' & plain,
                    linkDesc = xmltree.escape(getPlainDocstring(e).docstringSummary),
                    line = n.info.line.int)
 
@@ -1158,8 +1152,8 @@ proc genItem(d: PDoc, n, nameNode: PNode, k: TSymKind, docFlags: DocFlags, nonEx
                linkTitle = detailedName,
                linkDesc = xmltree.escape(plainDocstring.docstringSummary),
                line = n.info.line.int)
-  if k == skType and symNameNode.kind == nkSym:
-    d.types.strTableAdd symNameNode.sym
+  if k == skType and nameNode.kind == nkSym:
+    d.types.strTableAdd nameNode.sym
 
 proc genJsonItem(d: PDoc, n, nameNode: PNode, k: TSymKind, nonExports = false): JsonItem =
   if not isVisible(d, nameNode): return
@@ -1167,14 +1161,12 @@ proc genJsonItem(d: PDoc, n, nameNode: PNode, k: TSymKind, nonExports = false):
     name = getNameEsc(d, nameNode)
     comm = genRecComment(d, n)
     r: TSrcGen
-    renderFlags = {renderNoBody, renderNoComments, renderDocComments,
-      renderExpandUsing, renderNoPostfix}
+    renderFlags = {renderNoBody, renderNoComments, renderDocComments, renderExpandUsing}
   if nonExports:
     renderFlags.incl renderNonExportedFields
   r = initTokRender(n, renderFlags)
-  result = JsonItem(json: %{ "name": %name, "type": %($k), "line": %n.info.line.int,
+  result.json = %{ "name": %name, "type": %($k), "line": %n.info.line.int,
                    "col": %n.info.col}
-  )
   if comm != nil:
     result.rst = comm
     result.rstField = "description"
@@ -1206,7 +1198,8 @@ proc genJsonItem(d: PDoc, n, nameNode: PNode, k: TSymKind, nonExports = false):
         var param = %{"name": %($genericParam)}
         if genericParam.sym.typ.len > 0:
           param["types"] = newJArray()
-          param["types"] = %($genericParam.sym.typ.elementType)
+        for kind in genericParam.sym.typ:
+          param["types"].add %($kind)
         result.json["signature"]["genericParams"].add param
   if optGenIndex in d.conf.globalOptions:
     genItem(d, n, nameNode, k, kForceExport)
@@ -1406,8 +1399,7 @@ proc generateDoc*(d: PDoc, n, orig: PNode, config: ConfigRef, docFlags: DocFlags
     for it in n: traceDeps(d, it)
   of nkExportStmt:
     for it in n:
-      # bug #23051; don't generate documentation for exported symbols again
-      if it.kind == nkSym and sfExported notin it.sym.flags:
+      if it.kind == nkSym:
         if d.module != nil and d.module == it.sym.owner:
           generateDoc(d, it.sym.ast, orig, config, kForceExport)
         elif it.sym.ast != nil:
@@ -1813,7 +1805,7 @@ proc writeOutputJson*(d: PDoc, useWarning = false) =
     "moduleDescription": modDesc,
     "entries": d.jEntriesFinal}
   if optStdout in d.conf.globalOptions:
-    writeLine(stdout, $content)
+    write(stdout, $content)
   else:
     let dir = d.destFile.splitFile.dir
     createDir(dir)

compiler/enumtostr.nim

@@ -14,7 +14,7 @@ proc genEnumToStrProc*(t: PType; info: TLineInfo; g: ModuleGraph; idgen: IdGener
   let res = newSym(skResult, getIdent(g.cache, "result"), idgen, result, info)
   res.typ = getSysType(g, info, tyString)
 
-  result.typ = newType(tyProc, idgen, t.owner)
+  result.typ = newType(tyProc, nextTypeId idgen, t.owner)
   result.typ.n = newNodeI(nkFormalParams, info)
   rawAddSon(result.typ, res.typ)
   result.typ.n.add newNodeI(nkEffectList, info)
@@ -63,8 +63,8 @@ proc searchObjCaseImpl(obj: PNode; field: PSym): PNode =
 
 proc searchObjCase(t: PType; field: PSym): PNode =
   result = searchObjCaseImpl(t.n, field)
-  if result == nil and t.baseClass != nil:
-    result = searchObjCase(t.baseClass.skipTypes({tyAlias, tyGenericInst, tyRef, tyPtr}), field)
+  if result == nil and t.len > 0:
+    result = searchObjCase(t[0].skipTypes({tyAlias, tyGenericInst, tyRef, tyPtr}), field)
   doAssert result != nil
 
 proc genCaseObjDiscMapping*(t: PType; field: PSym; info: TLineInfo; g: ModuleGraph; idgen: IdGenerator): PSym =
@@ -76,7 +76,7 @@ proc genCaseObjDiscMapping*(t: PType; field: PSym; info: TLineInfo; g: ModuleGra
   let res = newSym(skResult, getIdent(g.cache, "result"), idgen, result, info)
   res.typ = getSysType(g, info, tyUInt8)
 
-  result.typ = newType(tyProc, idgen, t.owner)
+  result.typ = newType(tyProc, nextTypeId idgen, t.owner)
   result.typ.n = newNodeI(nkFormalParams, info)
   rawAddSon(result.typ, res.typ)
   result.typ.n.add newNodeI(nkEffectList, info)

compiler/errorhandling.nim

@@ -10,8 +10,7 @@
 ## This module contains support code for new-styled error
 ## handling via an `nkError` node kind.
 
-import ast, renderer, options, types
-import std/strutils
+import ast, renderer, options, strutils, types
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -41,8 +40,7 @@ proc newError*(wrongNode: PNode; k: ErrorKind; args: varargs[PNode]): PNode =
   let innerError = errorSubNode(wrongNode)
   if innerError != nil:
     return innerError
-  var idgen = idGeneratorForPackage(-1'i32)
-  result = newNodeIT(nkError, wrongNode.info, newType(tyError, idgen, nil))
+  result = newNodeIT(nkError, wrongNode.info, newType(tyError, ItemId(module: -1, item: -1), nil))
   result.add wrongNode
   result.add newIntNode(nkIntLit, ord(k))
   for a in args: result.add a
@@ -52,8 +50,7 @@ proc newError*(wrongNode: PNode; msg: string): PNode =
   let innerError = errorSubNode(wrongNode)
   if innerError != nil:
     return innerError
-  var idgen = idGeneratorForPackage(-1'i32)
-  result = newNodeIT(nkError, wrongNode.info, newType(tyError, idgen, nil))
+  result = newNodeIT(nkError, wrongNode.info, newType(tyError, ItemId(module: -1, item: -1), nil))
   result.add wrongNode
   result.add newIntNode(nkIntLit, ord(CustomError))
   result.add newStrNode(msg, wrongNode.info)

compiler/evalffi.nim

@@ -9,12 +9,10 @@
 
 ## This file implements the FFI part of the evaluator for Nim code.
 
-import ast, types, options, msgs, lineinfos
-from std/os import getAppFilename
+import ast, types, options, tables, dynlib, msgs, lineinfos
+from os import getAppFilename
 import libffi/libffi
 
-import std/[tables, dynlib]
-
 when defined(windows):
   const libcDll = "msvcrt.dll"
 elif defined(linux):
@@ -99,7 +97,7 @@ proc mapType(conf: ConfigRef, t: ast.PType): ptr libffi.Type =
      tyTyped, tyTypeDesc, tyProc, tyArray, tyStatic, tyNil:
     result = addr libffi.type_pointer
   of tyDistinct, tyAlias, tySink:
-    result = mapType(conf, t.skipModifier)
+    result = mapType(conf, t[0])
   else:
     result = nil
   # too risky:
@@ -126,16 +124,16 @@ proc packSize(conf: ConfigRef, v: PNode, typ: PType): int =
     if v.kind in {nkNilLit, nkPtrLit}:
       result = sizeof(pointer)
     else:
-      result = sizeof(pointer) + packSize(conf, v[0], typ.elementType)
+      result = sizeof(pointer) + packSize(conf, v[0], typ.lastSon)
   of tyDistinct, tyGenericInst, tyAlias, tySink:
-    result = packSize(conf, v, typ.skipModifier)
+    result = packSize(conf, v, typ[0])
   of tyArray:
     # consider: ptr array[0..1000_000, int] which is common for interfacing;
     # we use the real length here instead
     if v.kind in {nkNilLit, nkPtrLit}:
       result = sizeof(pointer)
     elif v.len != 0:
-      result = v.len * packSize(conf, v[0], typ.elementType)
+      result = v.len * packSize(conf, v[0], typ[1])
     else:
       result = 0
   else:
@@ -234,19 +232,19 @@ proc pack(conf: ConfigRef, v: PNode, typ: PType, res: pointer) =
         packRecCheck = 0
         globalError(conf, v.info, "cannot map value to FFI " & typeToString(v.typ))
       inc packRecCheck
-      pack(conf, v[0], typ.elementType, res +! sizeof(pointer))
+      pack(conf, v[0], typ.lastSon, res +! sizeof(pointer))
       dec packRecCheck
       awr(pointer, res +! sizeof(pointer))
   of tyArray:
-    let baseSize = getSize(conf, typ.elementType)
+    let baseSize = getSize(conf, typ[1])
     for i in 0..<v.len:
-      pack(conf, v[i], typ.elementType, res +! i * baseSize)
+      pack(conf, v[i], typ[1], res +! i * baseSize)
   of tyObject, tyTuple:
     packObject(conf, v, typ, res)
   of tyNil:
     discard
   of tyDistinct, tyGenericInst, tyAlias, tySink:
-    pack(conf, v, typ.skipModifier, res)
+    pack(conf, v, typ[0], res)
   else:
     globalError(conf, v.info, "cannot map value to FFI " & typeToString(v.typ))
 
@@ -304,9 +302,9 @@ proc unpackArray(conf: ConfigRef, x: pointer, typ: PType, n: PNode): PNode =
     result = n
     if result.kind != nkBracket:
       globalError(conf, n.info, "cannot map value from FFI")
-  let baseSize = getSize(conf, typ.elementType)
+  let baseSize = getSize(conf, typ[1])
   for i in 0..<result.len:
-    result[i] = unpack(conf, x +! i * baseSize, typ.elementType, result[i])
+    result[i] = unpack(conf, x +! i * baseSize, typ[1], result[i])
 
 proc canonNodeKind(k: TNodeKind): TNodeKind =
   case k
@@ -387,7 +385,7 @@ proc unpack(conf: ConfigRef, x: pointer, typ: PType, n: PNode): PNode =
       awi(nkPtrLit, cast[int](p))
     elif n != nil and n.len == 1:
       internalAssert(conf, n.kind == nkRefTy)
-      n[0] = unpack(conf, p, typ.elementType, n[0])
+      n[0] = unpack(conf, p, typ.lastSon, n[0])
       result = n
     else:
       result = nil
@@ -405,7 +403,7 @@ proc unpack(conf: ConfigRef, x: pointer, typ: PType, n: PNode): PNode =
   of tyNil:
     setNil()
   of tyDistinct, tyGenericInst, tyAlias, tySink:
-    result = unpack(conf, x, typ.skipModifier, n)
+    result = unpack(conf, x, typ.lastSon, n)
   else:
     # XXX what to do with 'array' here?
     result = nil
@@ -434,7 +432,7 @@ proc fficast*(conf: ConfigRef, x: PNode, destTyp: PType): PNode =
 proc callForeignFunction*(conf: ConfigRef, call: PNode): PNode =
   internalAssert conf, call[0].kind == nkPtrLit
 
-  var cif: TCif = default(TCif)
+  var cif: TCif
   var sig: ParamList = default(ParamList)
   # use the arguments' types for varargs support:
   for i in 1..<call.len:
@@ -444,7 +442,7 @@ proc callForeignFunction*(conf: ConfigRef, call: PNode): PNode =
 
   let typ = call[0].typ
   if prep_cif(cif, mapCallConv(conf, typ.callConv, call.info), cuint(call.len-1),
-              mapType(conf, typ.returnType), sig) != OK:
+              mapType(conf, typ[0]), sig) != OK:
     globalError(conf, call.info, "error in FFI call")
 
   var args: ArgList = default(ArgList)
@@ -453,15 +451,15 @@ proc callForeignFunction*(conf: ConfigRef, call: PNode): PNode =
     var t = call[i].typ
     args[i-1] = alloc0(packSize(conf, call[i], t))
     pack(conf, call[i], t, args[i-1])
-  let retVal = if isEmptyType(typ.returnType): pointer(nil)
-               else: alloc(getSize(conf, typ.returnType).int)
+  let retVal = if isEmptyType(typ[0]): pointer(nil)
+               else: alloc(getSize(conf, typ[0]).int)
 
   libffi.call(cif, fn, retVal, args)
 
   if retVal.isNil:
     result = newNode(nkEmpty)
   else:
-    result = unpack(conf, retVal, typ.returnType, nil)
+    result = unpack(conf, retVal, typ[0], nil)
     result.info = call.info
 
   if retVal != nil: dealloc retVal
@@ -474,7 +472,7 @@ proc callForeignFunction*(conf: ConfigRef, fn: PNode, fntyp: PType,
                           info: TLineInfo): PNode =
   internalAssert conf, fn.kind == nkPtrLit
 
-  var cif: TCif = default(TCif)
+  var cif: TCif
   var sig: ParamList = default(ParamList)
   for i in 0..len-1:
     var aTyp = args[i+start].typ

compiler/evaltempl.nim

@@ -9,16 +9,16 @@
 
 ## Template evaluation engine. Now hygienic.
 
-import options, ast, astalgo, msgs, renderer, lineinfos, idents, trees
-import std/strutils
+import
+  strutils, options, ast, astalgo, msgs, renderer, lineinfos, idents, trees
 
 type
   TemplCtx = object
     owner, genSymOwner: PSym
     instLines: bool   # use the instantiation lines numbers
     isDeclarative: bool
-    mapping: SymMapping # every gensym'ed symbol needs to be mapped to some
-                        # new symbol
+    mapping: TIdTable # every gensym'ed symbol needs to be mapped to some
+                      # new symbol
     config: ConfigRef
     ic: IdentCache
     instID: int
@@ -33,19 +33,6 @@ proc evalTemplateAux(templ, actual: PNode, c: var TemplCtx, result: PNode) =
     let x = param
     if x.kind == nkArgList:
       for y in items(x): result.add(y)
-    elif nfDefaultRefsParam in x.flags:
-      # value of default param needs to be evaluated like template body
-      # if it contains other template params
-      var res: PNode
-      if isAtom(x):
-        res = newNodeI(nkPar, x.info)
-        evalTemplateAux(x, actual, c, res)
-        if res.len == 1: res = res[0]
-      else:
-        res = copyNode(x)
-        for i in 0..<x.safeLen:
-          evalTemplateAux(x[i], actual, c, res)
-      result.add res
     else:
       result.add copyTree(x)
 
@@ -57,10 +44,10 @@ proc evalTemplateAux(templ, actual: PNode, c: var TemplCtx, result: PNode) =
         handleParam actual[s.position]
       elif (s.owner != nil) and (s.kind == skGenericParam or
            s.kind == skType and s.typ != nil and s.typ.kind == tyGenericParam):
-        handleParam actual[s.owner.typ.signatureLen + s.position - 1]
+        handleParam actual[s.owner.typ.len + s.position - 1]
       else:
         internalAssert c.config, sfGenSym in s.flags or s.kind == skType
-        var x = idTableGet(c.mapping, s)
+        var x = PSym(idTableGet(c.mapping, s))
         if x == nil:
           x = copySym(s, c.idgen)
           # sem'check needs to set the owner properly later, see bug #9476
@@ -69,7 +56,6 @@ proc evalTemplateAux(templ, actual: PNode, c: var TemplCtx, result: PNode) =
           #  internalAssert c.config, false
           idTablePut(c.mapping, s, x)
         if sfGenSym in s.flags:
-          # TODO: getIdent(c.ic, "`" & x.name.s & "`gensym" & $c.instID)
           result.add newIdentNode(getIdent(c.ic, x.name.s & "`gensym" & $c.instID),
             if c.instLines: actual.info else: templ.info)
         else:
@@ -130,7 +116,7 @@ proc evalTemplateArgs(n: PNode, s: PSym; conf: ConfigRef; fromHlo: bool): PNode
     # now that we have working untyped parameters.
     genericParams = if fromHlo: 0
                     else: s.ast[genericParamsPos].len
-    expectedRegularParams = s.typ.paramsLen
+    expectedRegularParams = s.typ.len-1
     givenRegularParams = totalParams - genericParams
   if givenRegularParams < 0: givenRegularParams = 0
 
@@ -196,14 +182,14 @@ proc evalTemplate*(n: PNode, tmpl, genSymOwner: PSym;
 
   # replace each param by the corresponding node:
   var args = evalTemplateArgs(n, tmpl, conf, fromHlo)
-  var ctx = TemplCtx(owner: tmpl,
-    genSymOwner: genSymOwner,
-    config: conf,
-    ic: ic,
-    mapping: initSymMapping(),
-    instID: instID[],
-    idgen: idgen
-  )
+  var ctx: TemplCtx
+  ctx.owner = tmpl
+  ctx.genSymOwner = genSymOwner
+  ctx.config = conf
+  ctx.ic = ic
+  ctx.mapping = initIdTable()
+  ctx.instID = instID[]
+  ctx.idgen = idgen
 
   let body = tmpl.ast[bodyPos]
   #echo "instantion of ", renderTree(body, {renderIds})

compiler/expanddefaults.nim

@@ -1,131 +0,0 @@
-#
-#
-#           The Nim Compiler
-#        (c) Copyright 2023 Andreas Rumpf
-#
-#    See the file "copying.txt", included in this
-#    distribution, for details about the copyright.
-#
-
-import lineinfos, ast, types
-
-proc caseObjDefaultBranch*(obj: PNode; branch: Int128): int =
-  result = 0
-  for i in 1 ..< obj.len:
-    for j in 0 .. obj[i].len - 2:
-      if obj[i][j].kind == nkRange:
-        let x = getOrdValue(obj[i][j][0])
-        let y = getOrdValue(obj[i][j][1])
-        if branch >= x and branch <= y:
-          return i
-      elif getOrdValue(obj[i][j]) == branch:
-        return i
-    if obj[i].len == 1:
-      # else branch
-      return i
-  return 1
-
-template newZero(t: PType; info: TLineInfo; k = nkIntLit): PNode = newNodeIT(k, info, t)
-
-proc expandDefault*(t: PType; info: TLineInfo): PNode
-
-proc expandField(s: PSym; info: TLineInfo): PNode =
-  result = newNodeIT(nkExprColonExpr, info, s.typ)
-  result.add newSymNode(s)
-  result.add expandDefault(s.typ, info)
-
-proc expandDefaultN(n: PNode; info: TLineInfo; res: PNode) =
-  case n.kind
-  of nkRecList:
-    for i in 0..<n.len:
-      expandDefaultN(n[i], info, res)
-  of nkRecCase:
-    res.add expandField(n[0].sym, info)
-    var branch = Zero
-    let constOrNil = n[0].sym.astdef
-    if constOrNil != nil:
-      branch = getOrdValue(constOrNil)
-
-    let selectedBranch = caseObjDefaultBranch(n, branch)
-    let b = lastSon(n[selectedBranch])
-    expandDefaultN b, info, res
-  of nkSym:
-    res.add expandField(n.sym, info)
-  else:
-    discard
-
-proc expandDefaultObj(t: PType; info: TLineInfo; res: PNode) =
-  if t.baseClass != nil:
-    expandDefaultObj(t.baseClass, info, res)
-  expandDefaultN(t.n, info, res)
-
-proc expandDefault(t: PType; info: TLineInfo): PNode =
-  case t.kind
-  of tyInt:     result = newZero(t, info, nkIntLit)
-  of tyInt8:    result = newZero(t, info, nkInt8Lit)
-  of tyInt16:   result = newZero(t, info, nkInt16Lit)
-  of tyInt32:   result = newZero(t, info, nkInt32Lit)
-  of tyInt64:   result = newZero(t, info, nkInt64Lit)
-  of tyUInt:    result = newZero(t, info, nkUIntLit)
-  of tyUInt8:   result = newZero(t, info, nkUInt8Lit)
-  of tyUInt16:  result = newZero(t, info, nkUInt16Lit)
-  of tyUInt32:  result = newZero(t, info, nkUInt32Lit)
-  of tyUInt64:  result = newZero(t, info, nkUInt64Lit)
-  of tyFloat:   result = newZero(t, info, nkFloatLit)
-  of tyFloat32: result = newZero(t, info, nkFloat32Lit)
-  of tyFloat64: result = newZero(t, info, nkFloat64Lit)
-  of tyFloat128: result = newZero(t, info, nkFloat64Lit)
-  of tyChar:    result = newZero(t, info, nkCharLit)
-  of tyBool:    result = newZero(t, info, nkIntLit)
-  of tyEnum:
-    # Could use low(T) here to finally fix old language quirks
-    result = newZero(t, info, nkIntLit)
-  of tyRange:
-    # Could use low(T) here to finally fix old language quirks
-    result = expandDefault(skipModifier t, info)
-  of tyVoid: result = newZero(t, info, nkEmpty)
-  of tySink, tyGenericInst, tyDistinct, tyAlias, tyOwned:
-    result = expandDefault(t.skipModifier, info)
-  of tyOrdinal, tyGenericBody, tyGenericParam, tyInferred, tyStatic:
-    if t.hasElementType:
-      result = expandDefault(t.skipModifier, info)
-    else:
-      result = newZero(t, info, nkEmpty)
-  of tyFromExpr:
-    if t.n != nil and t.n.typ != nil:
-      result = expandDefault(t.n.typ, info)
-    else:
-      result = newZero(t, info, nkEmpty)
-  of tyArray:
-    result = newZero(t, info, nkBracket)
-    let n = toInt64(lengthOrd(nil, t))
-    for i in 0..<n:
-      result.add expandDefault(t.elementType, info)
-  of tyPtr, tyRef, tyProc, tyPointer, tyCstring:
-    result = newZero(t, info, nkNilLit)
-  of tyVar, tyLent:
-    let e = t.elementType
-    if e.skipTypes(abstractInst).kind in {tyOpenArray, tyVarargs}:
-      # skip the modifier, `var openArray` is a (ptr, len) pair too:
-      result = expandDefault(e, info)
-    else:
-      result = newZero(e, info, nkNilLit)
-  of tySet:
-    result = newZero(t, info, nkCurly)
-  of tyObject:
-    result = newNodeIT(nkObjConstr, info, t)
-    result.add newNodeIT(nkType, info, t)
-    expandDefaultObj(t, info, result)
-  of tyTuple:
-    result = newZero(t, info, nkTupleConstr)
-    for it in t.kids:
-      result.add expandDefault(it, info)
-  of tyVarargs, tyOpenArray, tySequence, tyUncheckedArray:
-    result = newZero(t, info, nkBracket)
-  of tyString:
-    result = newZero(t, info, nkStrLit)
-  of tyNone, tyEmpty, tyUntyped, tyTyped, tyTypeDesc,
-     tyNil, tyGenericInvocation, tyError, tyBuiltInTypeClass,
-     tyUserTypeClass, tyUserTypeClassInst, tyCompositeTypeClass,
-     tyAnd, tyOr, tyNot, tyAnything, tyConcept, tyIterable, tyForward:
-    result = newZero(t, info, nkEmpty) # bug indicator

compiler/extccomp.nim

@@ -19,7 +19,7 @@ import std/[os, osproc, streams, sequtils, times, strtabs, json, jsonutils, suga
 import std / strutils except addf
 
 when defined(nimPreviewSlimSystem):
-  import std/[syncio, assertions]
+  import std/syncio
 
 import ../dist/checksums/src/checksums/sha1
 
@@ -33,7 +33,6 @@ type
     hasGnuAsm,                # CC's asm uses the absurd GNU assembler syntax
     hasDeclspec,              # CC has __declspec(X)
     hasAttribute,             # CC has __attribute__((X))
-    hasBuiltinUnreachable     # CC has __builtin_unreachable
   TInfoCCProps* = set[TInfoCCProp]
   TInfoCC* = tuple[
     name: string,        # the short name of the compiler
@@ -96,7 +95,7 @@ compiler gcc:
     produceAsm: gnuAsmListing,
     cppXsupport: "-std=gnu++17 -funsigned-char",
     props: {hasSwitchRange, hasComputedGoto, hasCpp, hasGcGuard, hasGnuAsm,
-            hasAttribute, hasBuiltinUnreachable})
+            hasAttribute})
 
 # GNU C and C++ Compiler
 compiler nintendoSwitchGCC:
@@ -123,7 +122,7 @@ compiler nintendoSwitchGCC:
     produceAsm: gnuAsmListing,
     cppXsupport: "-std=gnu++17 -funsigned-char",
     props: {hasSwitchRange, hasComputedGoto, hasCpp, hasGcGuard, hasGnuAsm,
-            hasAttribute, hasBuiltinUnreachable})
+            hasAttribute})
 
 # LLVM Frontend for GCC/G++
 compiler llvmGcc:
@@ -172,22 +171,6 @@ compiler vcc:
     cppXsupport: "",
     props: {hasCpp, hasAssume, hasDeclspec})
 
-# Nvidia CUDA NVCC Compiler
-compiler nvcc:
-  result = gcc()
-  result.name = "nvcc"
-  result.compilerExe = "nvcc"
-  result.cppCompiler = "nvcc"
-  result.compileTmpl = "-c -x cu -Xcompiler=\"$options\" $include -o $objfile $file"
-  result.linkTmpl = "$buildgui $builddll -o $exefile $objfiles -Xcompiler=\"$options\""
-
-# AMD HIPCC Compiler (rocm/cuda)
-compiler hipcc:
-  result = clang()
-  result.name = "hipcc"
-  result.compilerExe = "hipcc"
-  result.cppCompiler = "hipcc"
-
 compiler clangcl:
   result = vcc()
   result.name = "clang_cl"
@@ -301,9 +284,7 @@ const
     envcc(),
     icl(),
     icc(),
-    clangcl(),
-    hipcc(),
-    nvcc()]
+    clangcl()]
 
   hExt* = ".h"
 
@@ -1004,7 +985,6 @@ const cacheVersion = "D20210525T193831" # update when `BuildCache` spec changes
 type BuildCache = object
   cacheVersion: string
   outputFile: string
-  outputChecksum: string
   compile: seq[(string, string)]
   link: seq[string]
   linkcmd: string
@@ -1018,7 +998,7 @@ type BuildCache = object
   depfiles: seq[(string, string)]
   nimexe: string
 
-proc writeJsonBuildInstructions*(conf: ConfigRef; deps: StringTableRef) =
+proc writeJsonBuildInstructions*(conf: ConfigRef) =
   var linkFiles = collect(for it in conf.externalToLink:
     var it = it
     if conf.noAbsolutePaths: it = it.extractFilename
@@ -1039,16 +1019,11 @@ proc writeJsonBuildInstructions*(conf: ConfigRef; deps: StringTableRef) =
     currentDir: getCurrentDir())
   if optRun in conf.globalOptions or isDefined(conf, "nimBetterRun"):
     bcache.cmdline = conf.commandLine
-    for it in conf.m.fileInfos:
+    bcache.depfiles = collect(for it in conf.m.fileInfos:
       let path = it.fullPath.string
       if isAbsolute(path): # TODO: else?
-        if path in deps:
-          bcache.depfiles.add (path, deps[path])
-        else: # backup for configs etc.
-          bcache.depfiles.add (path, $secureHashFile(path))
-
+        (path, $secureHashFile(path)))
     bcache.nimexe = hashNimExe()
-    bcache.outputChecksum = $secureHashFile(bcache.outputFile)
   conf.jsonBuildFile = conf.jsonBuildInstructionsFile
   conf.jsonBuildFile.string.writeFile(bcache.toJson.pretty)
 
@@ -1069,8 +1044,6 @@ proc changeDetectedViaJsonBuildInstructions*(conf: ConfigRef; jsonFile: Absolute
     # xxx optimize by returning false if stdin input was the same
   for (file, hash) in bcache.depfiles:
     if $secureHashFile(file) != hash: return true
-  if bcache.outputChecksum != $secureHashFile(bcache.outputFile):
-    return true
 
 proc runJsonBuildInstructions*(conf: ConfigRef; jsonFile: AbsoluteFile) =
   var bcache: BuildCache = default(BuildCache)
@@ -1087,7 +1060,7 @@ proc runJsonBuildInstructions*(conf: ConfigRef; jsonFile: AbsoluteFile) =
       "jsonscript command outputFile '$1' must match '$2' which was specified during --compileOnly, see \"outputFile\" entry in '$3' " %
       [outputCurrent, output, jsonFile.string])
   var cmds: TStringSeq = default(TStringSeq)
-  var prettyCmds: TStringSeq = default(TStringSeq)
+  var prettyCmds: TStringSeq= default(TStringSeq)
   let prettyCb = proc (idx: int) = writePrettyCmdsStderr(prettyCmds[idx])
   for (name, cmd) in bcache.compile:
     cmds.add cmd

compiler/filter_tmpl.nim

@@ -10,11 +10,9 @@
 # This module implements Nim's standard template filter.
 
 import
-  llstream, ast, msgs, options,
+  llstream, strutils, ast, msgs, options,
   filters, lineinfos, pathutils
 
-import std/strutils
-
 type
   TParseState = enum
     psDirective, psTempl

compiler/filters.nim

@@ -10,11 +10,9 @@
 # This module implements Nim's simple filters and helpers for filters.
 
 import
-  llstream, idents, ast, msgs, options,
+  llstream, idents, strutils, ast, msgs, options,
   renderer, pathutils
 
-import std/strutils
-
 proc invalidPragma(conf: ConfigRef; n: PNode) =
   localError(conf, n.info,
       "'$1' not allowed here" % renderTree(n, {renderNoComments}))

compiler/gorgeimpl.nim

@@ -9,9 +9,8 @@
 
 ## Module that implements ``gorge`` for the compiler.
 
-import msgs, options, lineinfos, pathutils
-
-import std/[os, osproc, streams]
+import msgs, os, osproc, streams, options,
+  lineinfos, pathutils
 
 when defined(nimPreviewSlimSystem):
   import std/syncio

compiler/guards.nim

@@ -870,7 +870,7 @@ template isSub(x): untyped = x.getMagic in someSub
 template isVal(x): untyped = x.kind in {nkCharLit..nkUInt64Lit}
 template isIntVal(x, y): untyped = x.intVal == y
 
-import std/macros
+import macros
 
 macro `=~`(x: PNode, pat: untyped): bool =
   proc m(x, pat, conds: NimNode) =
@@ -1063,7 +1063,7 @@ proc pleViaModel(model: TModel; aa, bb: PNode): TImplication =
       let b = fact[2]
       if a.kind == nkSym: replacements.add((a,b))
       else: replacements.add((b,a))
-  var m = TModel()
+  var m: TModel
   var a = aa
   var b = bb
   if replacements.len > 0:
@@ -1098,8 +1098,8 @@ proc addFactLt*(m: var TModel; a, b: PNode) =
   addFactLe(m, a, bb)
 
 proc settype(n: PNode): PType =
-  var idgen = idGeneratorForPackage(-1'i32)
-  result = newType(tySet, idgen, n.typ.owner)
+  result = newType(tySet, ItemId(module: -1, item: -1), n.typ.owner)
+  var idgen: IdGenerator = nil
   addSonSkipIntLit(result, n.typ, idgen)
 
 proc buildOf(it, loc: PNode; o: Operators): PNode =

compiler/hlo.nim

@@ -10,6 +10,9 @@
 # This include implements the high level optimization pass.
 # included from sem.nim
 
+when defined(nimPreviewSlimSystem):
+  import std/assertions
+
 proc hlo(c: PContext, n: PNode): PNode
 
 proc evalPattern(c: PContext, n, orig: PNode): PNode =

compiler/ic/bitabs.nim

@@ -1,8 +1,7 @@
 ## A BiTable is a table that can be seen as an optimized pair
 ## of `(Table[LitId, Val], Table[Val, LitId])`.
 
-import std/hashes
-import rodfiles
+import hashes, rodfiles
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -14,8 +13,6 @@ type
     vals: seq[T] # indexed by LitId
     keys: seq[LitId]  # indexed by hash(val)
 
-proc initBiTable*[T](): BiTable[T] = BiTable[T](vals: @[], keys: @[])
-
 proc nextTry(h, maxHash: Hash): Hash {.inline.} =
   result = (h + 1) and maxHash
 
@@ -36,7 +33,9 @@ proc mustRehash(length, counter: int): bool {.inline.} =
   result = (length * 2 < counter * 3) or (length - counter < 4)
 
 const
-  idStart = 1
+  idStart = 256 ##
+  ## Ids do not start with 0 but with this value. The IR needs it.
+  ## TODO: explain why
 
 template idToIdx(x: LitId): int = x.int - idStart
 
@@ -119,12 +118,6 @@ proc load*[T](f: var RodFile; t: var BiTable[T]) =
   loadSeq(f, t.vals)
   loadSeq(f, t.keys)
 
-proc sizeOnDisc*(t: BiTable[string]): int =
-  result = 4
-  for x in t.vals:
-    result += x.len + 4
-  result += t.keys.len * sizeof(LitId)
-
 when isMainModule:
 
   var t: BiTable[string]

compiler/ic/cbackend.nim

@@ -18,7 +18,7 @@
 ## also doing cross-module dependency tracking and DCE that we don't need
 ## anymore. DCE is now done as prepass over the entire packed module graph.
 
-import std/[packedsets, algorithm, tables]
+import std/packedsets, algorithm, tables
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -50,9 +50,10 @@ proc generateCodeForModule(g: ModuleGraph; m: var LoadedModule; alive: var Alive
     let n = unpackTree(g, m.module.position, m.fromDisk.topLevel, p)
     cgen.genTopLevelStmt(bmod, n)
 
-  finalCodegenActions(g, bmod, newNodeI(nkStmtList, m.module.info))
-  for disp in getDispatchers(g):
-    genProcAux(bmod, disp)
+  let disps = finalCodegenActions(g, bmod, newNodeI(nkStmtList, m.module.info))
+  if disps != nil:
+    for disp in disps:
+      genProcAux(bmod, disp.sym)
   m.fromDisk.backendFlags = cgen.whichInitProcs(bmod)
 
 proc replayTypeInfo(g: ModuleGraph; m: var LoadedModule; origin: FileIndex) =
@@ -146,12 +147,12 @@ proc generateCode*(g: ModuleGraph) =
   var alive = computeAliveSyms(g.packed, g.config)
 
   when false:
-    for i in 0..<len(g.packed):
+    for i in 0..high(g.packed):
       echo i, " is of status ", g.packed[i].status, " ", toFullPath(g.config, FileIndex(i))
 
   # First pass: Setup all the backend modules for all the modules that have
   # changed:
-  for i in 0..<len(g.packed):
+  for i in 0..high(g.packed):
     # case statement here to enforce exhaustive checks.
     case g.packed[i].status
     of undefined:
@@ -173,7 +174,7 @@ proc generateCode*(g: ModuleGraph) =
   let mainModuleIdx = g.config.projectMainIdx2.int
   # We need to generate the main module last, because only then
   # all init procs have been registered:
-  for i in 0..<len(g.packed):
+  for i in 0..high(g.packed):
     if i != mainModuleIdx:
       genPackedModule(g, i, alive)
   if mainModuleIdx >= 0:

compiler/ic/dce.nim

@@ -109,13 +109,13 @@ proc aliveCode(c: var AliveContext; g: PackedModuleGraph; tree: PackedTree; n: N
     discard "ignore non-sym atoms"
   of nkSym:
     # This symbol is alive and everything its body references.
-    followLater(c, g, c.thisModule, tree[n].soperand)
+    followLater(c, g, c.thisModule, n.operand)
   of nkModuleRef:
     let (n1, n2) = sons2(tree, n)
-    assert n1.kind == nkNone
-    assert n2.kind == nkNone
+    assert n1.kind == nkInt32Lit
+    assert n2.kind == nkInt32Lit
     let m = n1.litId
-    let item = tree[n2].soperand
+    let item = n2.operand
     let otherModule = toFileIndexCached(c.decoder, g, c.thisModule, m).int
     followLater(c, g, otherModule, item)
   of nkMacroDef, nkTemplateDef, nkTypeSection, nkTypeOfExpr,
@@ -131,7 +131,7 @@ proc aliveCode(c: var AliveContext; g: PackedModuleGraph; tree: PackedTree; n: N
     rangeCheckAnalysis(c, g, tree, n)
   of nkProcDef, nkConverterDef, nkMethodDef, nkFuncDef, nkIteratorDef:
     if n.firstSon.kind == nkSym and isNotGeneric(n):
-      let item = tree[n.firstSon].soperand
+      let item = n.firstSon.operand
       if isExportedToC(c, g, item):
         # This symbol is alive and everything its body references.
         followLater(c, g, c.thisModule, item)
@@ -153,7 +153,7 @@ proc computeAliveSyms*(g: PackedModuleGraph; conf: ConfigRef): AliveSyms =
   var c = AliveContext(stack: @[], decoder: PackedDecoder(config: conf),
                        thisModule: -1, alive: newSeq[IntSet](g.len),
                        options: conf.options)
-  for i in countdown(len(g)-1, 0):
+  for i in countdown(high(g), 0):
     if g[i].status != undefined:
       c.thisModule = i
       for p in allNodes(g[i].fromDisk.topLevel):

compiler/ic/ic.nim

@@ -7,17 +7,15 @@
 #    distribution, for details about the copyright.
 #
 
-import std/[hashes, tables, intsets, monotimes]
+import hashes, tables, intsets
 import packed_ast, bitabs, rodfiles
 import ".." / [ast, idents, lineinfos, msgs, ropes, options,
   pathutils, condsyms, packages, modulepaths]
 #import ".." / [renderer, astalgo]
-from std/os import removeFile, isAbsolute
+from os import removeFile, isAbsolute
 
 import ../../dist/checksums/src/checksums/sha1
 
-import iclineinfos
-
 when defined(nimPreviewSlimSystem):
   import std/[syncio, assertions, formatfloat]
 
@@ -43,28 +41,25 @@ type
     bodies*: PackedTree # other trees. Referenced from typ.n and sym.ast by their position.
     #producedGenerics*: Table[GenericKey, SymId]
     exports*: seq[(LitId, int32)]
-    hidden: seq[(LitId, int32)]
-    reexports: seq[(LitId, PackedItemId)]
+    hidden*: seq[(LitId, int32)]
+    reexports*: seq[(LitId, PackedItemId)]
     compilerProcs*: seq[(LitId, int32)]
     converters*, methods*, trmacros*, pureEnums*: seq[int32]
 
     typeInstCache*: seq[(PackedItemId, PackedItemId)]
     procInstCache*: seq[PackedInstantiation]
     attachedOps*: seq[(PackedItemId, TTypeAttachedOp, PackedItemId)]
-    methodsPerGenericType*: seq[(PackedItemId, int, PackedItemId)]
+    methodsPerType*: seq[(PackedItemId, int, PackedItemId)]
     enumToStringProcs*: seq[(PackedItemId, PackedItemId)]
-    methodsPerType*: seq[(PackedItemId, PackedItemId)]
-    dispatchers*: seq[PackedItemId]
 
     emittedTypeInfo*: seq[string]
     backendFlags*: set[ModuleBackendFlag]
 
-    syms*: OrderedTable[int32, PackedSym]
-    types*: OrderedTable[int32, PackedType]
+    syms*: seq[PackedSym]
+    types*: seq[PackedType]
     strings*: BiTable[string] # we could share these between modules.
     numbers*: BiTable[BiggestInt] # we also store floats in here so
                                   # that we can assure that every bit is kept
-    man*: LineInfoManager
 
     cfg: PackedConfig
 
@@ -80,36 +75,37 @@ type
     symMarker*: IntSet #Table[ItemId, SymId]    # ItemId.item -> SymId
     config*: ConfigRef
 
-proc toString*(tree: PackedTree; pos: NodePos; m: PackedModule; nesting: int;
+proc toString*(tree: PackedTree; n: NodePos; m: PackedModule; nesting: int;
                result: var string) =
+  let pos = n.int
   if result.len > 0 and result[^1] notin {' ', '\n'}:
     result.add ' '
 
   result.add $tree[pos].kind
-  case tree[pos].kind
-  of nkEmpty, nkNilLit, nkType: discard
+  case tree.nodes[pos].kind
+  of nkNone, nkEmpty, nkNilLit, nkType: discard
   of nkIdent, nkStrLit..nkTripleStrLit:
     result.add " "
-    result.add m.strings[LitId tree[pos].uoperand]
+    result.add m.strings[LitId tree.nodes[pos].operand]
   of nkSym:
     result.add " "
-    result.add m.strings[m.syms[tree[pos].soperand].name]
+    result.add m.strings[m.syms[tree.nodes[pos].operand].name]
   of directIntLit:
     result.add " "
-    result.addInt tree[pos].soperand
+    result.addInt tree.nodes[pos].operand
   of externSIntLit:
     result.add " "
-    result.addInt m.numbers[LitId tree[pos].uoperand]
+    result.addInt m.numbers[LitId tree.nodes[pos].operand]
   of externUIntLit:
     result.add " "
-    result.addInt cast[uint64](m.numbers[LitId tree[pos].uoperand])
+    result.addInt cast[uint64](m.numbers[LitId tree.nodes[pos].operand])
   of nkFloatLit..nkFloat128Lit:
     result.add " "
-    result.addFloat cast[BiggestFloat](m.numbers[LitId tree[pos].uoperand])
+    result.addFloat cast[BiggestFloat](m.numbers[LitId tree.nodes[pos].operand])
   else:
     result.add "(\n"
     for i in 1..(nesting+1)*2: result.add ' '
-    for child in sonsReadonly(tree, pos):
+    for child in sonsReadonly(tree, n):
       toString(tree, child, m, nesting + 1, result)
     result.add "\n"
     for i in 1..nesting*2: result.add ' '
@@ -235,14 +231,10 @@ proc addImportFileDep*(c: var PackedEncoder; m: var PackedModule; f: FileIndex)
   m.imports.add toLitId(f, c, m)
 
 proc addHidden*(c: var PackedEncoder; m: var PackedModule; s: PSym) =
-  assert s.kind != skUnknown
   let nameId = getOrIncl(m.strings, s.name.s)
   m.hidden.add((nameId, s.itemId.item))
-  assert s.itemId.module == c.thisModule
 
 proc addExported*(c: var PackedEncoder; m: var PackedModule; s: PSym) =
-  assert s.kind != skUnknown
-  assert s.itemId.module == c.thisModule
   let nameId = getOrIncl(m.strings, s.name.s)
   m.exports.add((nameId, s.itemId.item))
 
@@ -261,8 +253,6 @@ proc addMethod*(c: var PackedEncoder; m: var PackedModule; s: PSym) =
   m.methods.add s.itemId.item
 
 proc addReexport*(c: var PackedEncoder; m: var PackedModule; s: PSym) =
-  assert s.kind != skUnknown
-  if s.kind == skModule: return
   let nameId = getOrIncl(m.strings, s.name.s)
   m.reexports.add((nameId, PackedItemId(module: toLitId(s.itemId.module.FileIndex, c, m),
                                         item: s.itemId.item)))
@@ -294,8 +284,7 @@ proc toLitId(x: BiggestInt; m: var PackedModule): LitId =
   result = getOrIncl(m.numbers, x)
 
 proc toPackedInfo(x: TLineInfo; c: var PackedEncoder; m: var PackedModule): PackedLineInfo =
-  pack(m.man, toLitId(x.fileIndex, c, m), x.line.int32, x.col.int32)
-  #PackedLineInfo(line: x.line, col: x.col, file: toLitId(x.fileIndex, c, m))
+  PackedLineInfo(line: x.line, col: x.col, file: toLitId(x.fileIndex, c, m))
 
 proc safeItemId(s: PSym; c: var PackedEncoder; m: var PackedModule): PackedItemId {.inline.} =
   ## given a symbol, produce an ItemId with the correct properties
@@ -347,7 +336,7 @@ proc storeTypeLater(t: PType; c: var PackedEncoder; m: var PackedModule): Packed
 proc storeSymLater(s: PSym; c: var PackedEncoder; m: var PackedModule): PackedItemId =
   if s.isNil: return nilItemId
   assert s.itemId.module >= 0
-  assert s.itemId.item >= 0
+  assert s.itemId.module >= 0
   result = PackedItemId(module: toLitId(s.itemId.module.FileIndex, c, m), item: s.itemId.item)
   if s.itemId.module == c.thisModule:
     # the sym belongs to this module, so serialize it here, eventually.
@@ -362,15 +351,15 @@ proc storeType(t: PType; c: var PackedEncoder; m: var PackedModule): PackedItemI
   result = PackedItemId(module: toLitId(t.uniqueId.module.FileIndex, c, m), item: t.uniqueId.item)
 
   if t.uniqueId.module == c.thisModule and not c.typeMarker.containsOrIncl(t.uniqueId.item):
-    #if t.uniqueId.item >= m.types.len:
-    #  setLen m.types, t.uniqueId.item+1
+    if t.uniqueId.item >= m.types.len:
+      setLen m.types, t.uniqueId.item+1
 
-    var p = PackedType(id: t.uniqueId.item, kind: t.kind, flags: t.flags, callConv: t.callConv,
+    var p = PackedType(kind: t.kind, flags: t.flags, callConv: t.callConv,
       size: t.size, align: t.align, nonUniqueId: t.itemId.item,
       paddingAtEnd: t.paddingAtEnd)
     storeNode(p, t, n)
     p.typeInst = t.typeInst.storeType(c, m)
-    for kid in kids t:
+    for kid in items t:
       p.types.add kid.storeType(c, m)
     c.addMissing t.sym
     p.sym = t.sym.safeItemId(c, m)
@@ -383,9 +372,10 @@ proc storeType(t: PType; c: var PackedEncoder; m: var PackedModule): PackedItemI
 proc toPackedLib(l: PLib; c: var PackedEncoder; m: var PackedModule): PackedLib =
   ## the plib hangs off the psym via the .annex field
   if l.isNil: return
-  result = PackedLib(kind: l.kind, generated: l.generated,
-    isOverridden: l.isOverridden, name: toLitId($l.name, m)
-  )
+  result.kind = l.kind
+  result.generated = l.generated
+  result.isOverridden = l.isOverridden
+  result.name = toLitId($l.name, m)
   storeNode(result, l, path)
 
 proc storeSym*(s: PSym; c: var PackedEncoder; m: var PackedModule): PackedItemId =
@@ -396,12 +386,12 @@ proc storeSym*(s: PSym; c: var PackedEncoder; m: var PackedModule): PackedItemId
   result = PackedItemId(module: toLitId(s.itemId.module.FileIndex, c, m), item: s.itemId.item)
 
   if s.itemId.module == c.thisModule and not c.symMarker.containsOrIncl(s.itemId.item):
-    #if s.itemId.item >= m.syms.len:
-    #  setLen m.syms, s.itemId.item+1
+    if s.itemId.item >= m.syms.len:
+      setLen m.syms, s.itemId.item+1
 
     assert sfForward notin s.flags
 
-    var p = PackedSym(id: s.itemId.item, kind: s.kind, flags: s.flags, info: s.info.toPackedInfo(c, m), magic: s.magic,
+    var p = PackedSym(kind: s.kind, flags: s.flags, info: s.info.toPackedInfo(c, m), magic: s.magic,
       position: s.position, offset: s.offset, disamb: s.disamb, options: s.options,
       name: s.name.s.toLitId(m))
 
@@ -414,7 +404,7 @@ proc storeSym*(s: PSym; c: var PackedEncoder; m: var PackedModule): PackedItemId
       p.bitsize = s.bitsize
       p.alignment = s.alignment
 
-    p.externalName = toLitId(s.loc.snippet, m)
+    p.externalName = toLitId(s.loc.r, m)
     p.locFlags = s.loc.flags
     c.addMissing s.typ
     p.typ = s.typ.storeType(c, m)
@@ -423,7 +413,6 @@ proc storeSym*(s: PSym; c: var PackedEncoder; m: var PackedModule): PackedItemId
     p.annex = toPackedLib(s.annex, c, m)
     when hasFFI:
       p.cname = toLitId(s.cname, m)
-    p.instantiatedFrom = s.instantiatedFrom.safeItemId(c, m)
 
     # fill the reserved slot, nothing else:
     m.syms[s.itemId.item] = p
@@ -431,59 +420,53 @@ proc storeSym*(s: PSym; c: var PackedEncoder; m: var PackedModule): PackedItemId
 proc addModuleRef(n: PNode; ir: var PackedTree; c: var PackedEncoder; m: var PackedModule) =
   ## add a remote symbol reference to the tree
   let info = n.info.toPackedInfo(c, m)
-  if n.typ != n.sym.typ:
-    ir.addNode(kind = nkModuleRef, operand = 3.int32, # spans 3 nodes in total
-               info = info, flags = n.flags,
-               typeId = storeTypeLater(n.typ, c, m))
-  else:
-    ir.addNode(kind = nkModuleRef, operand = 3.int32, # spans 3 nodes in total
-              info = info, flags = n.flags)
-  ir.addNode(kind = nkNone, info = info,
-             operand = toLitId(n.sym.itemId.module.FileIndex, c, m).int32)
-  ir.addNode(kind = nkNone, info = info,
-             operand = n.sym.itemId.item)
+  ir.nodes.add PackedNode(kind: nkModuleRef, operand: 3.int32, # spans 3 nodes in total
+                          typeId: storeTypeLater(n.typ, c, m), info: info)
+  ir.nodes.add PackedNode(kind: nkInt32Lit, info: info,
+                          operand: toLitId(n.sym.itemId.module.FileIndex, c, m).int32)
+  ir.nodes.add PackedNode(kind: nkInt32Lit, info: info,
+                          operand: n.sym.itemId.item)
 
 proc toPackedNode*(n: PNode; ir: var PackedTree; c: var PackedEncoder; m: var PackedModule) =
   ## serialize a node into the tree
   if n == nil:
-    ir.addNode(kind = nkNilRodNode, operand = 1, info = NoLineInfo)
+    ir.nodes.add PackedNode(kind: nkNilRodNode, flags: {}, operand: 1)
     return
   let info = toPackedInfo(n.info, c, m)
   case n.kind
   of nkNone, nkEmpty, nkNilLit, nkType:
-    ir.addNode(kind = n.kind, flags = n.flags, operand = 0,
-               typeId = storeTypeLater(n.typ, c, m), info = info)
+    ir.nodes.add PackedNode(kind: n.kind, flags: n.flags, operand: 0,
+                            typeId: storeTypeLater(n.typ, c, m), info: info)
   of nkIdent:
-    ir.addNode(kind = n.kind, flags = n.flags,
-                operand = int32 getOrIncl(m.strings, n.ident.s),
-                typeId = storeTypeLater(n.typ, c, m), info = info)
+    ir.nodes.add PackedNode(kind: n.kind, flags: n.flags,
+                            operand: int32 getOrIncl(m.strings, n.ident.s),
+                            typeId: storeTypeLater(n.typ, c, m), info: info)
   of nkSym:
     if n.sym.itemId.module == c.thisModule:
       # it is a symbol that belongs to the module we're currently
       # packing:
       let id = n.sym.storeSymLater(c, m).item
-      if n.typ != n.sym.typ:
-        ir.addNode(kind = nkSym, flags = n.flags, operand = id,
-                   info = info,
-                   typeId = storeTypeLater(n.typ, c, m))
-      else:
-        ir.addNode(kind = nkSym, flags = n.flags, operand = id,
-                   info = info)
+      ir.nodes.add PackedNode(kind: nkSym, flags: n.flags, operand: id,
+                              typeId: storeTypeLater(n.typ, c, m), info: info)
     else:
       # store it as an external module reference:
       addModuleRef(n, ir, c, m)
+  of directIntLit:
+    ir.nodes.add PackedNode(kind: n.kind, flags: n.flags,
+                            operand: int32(n.intVal),
+                            typeId: storeTypeLater(n.typ, c, m), info: info)
   of externIntLit:
-    ir.addNode(kind = n.kind, flags = n.flags,
-               operand = int32 getOrIncl(m.numbers, n.intVal),
-               typeId = storeTypeLater(n.typ, c, m), info = info)
+    ir.nodes.add PackedNode(kind: n.kind, flags: n.flags,
+                            operand: int32 getOrIncl(m.numbers, n.intVal),
+                            typeId: storeTypeLater(n.typ, c, m), info: info)
   of nkStrLit..nkTripleStrLit:
-    ir.addNode(kind = n.kind, flags = n.flags,
-               operand = int32 getOrIncl(m.strings, n.strVal),
-               typeId = storeTypeLater(n.typ, c, m), info = info)
+    ir.nodes.add PackedNode(kind: n.kind, flags: n.flags,
+                            operand: int32 getOrIncl(m.strings, n.strVal),
+                            typeId: storeTypeLater(n.typ, c, m), info: info)
   of nkFloatLit..nkFloat128Lit:
-    ir.addNode(kind = n.kind, flags = n.flags,
-               operand = int32 getOrIncl(m.numbers, cast[BiggestInt](n.floatVal)),
-               typeId = storeTypeLater(n.typ, c, m), info = info)
+    ir.nodes.add PackedNode(kind: n.kind, flags: n.flags,
+                            operand: int32 getOrIncl(m.numbers, cast[BiggestInt](n.floatVal)),
+                            typeId: storeTypeLater(n.typ, c, m), info: info)
   else:
     let patchPos = ir.prepare(n.kind, n.flags,
                               storeTypeLater(n.typ, c, m), info)
@@ -508,8 +491,8 @@ proc toPackedProcDef(n: PNode; ir: var PackedTree; c: var PackedEncoder; m: var
       # do not serialize the body of the proc, it's unnecessary since
       # n[0].sym.ast has the sem'checked variant of it which is what
       # everybody should use instead.
-      ir.addNode(kind = nkEmpty, flags = {}, operand = 0,
-                 typeId = nilItemId, info = info)
+      ir.nodes.add PackedNode(kind: nkEmpty, flags: {}, operand: 0,
+                              typeId: nilItemId, info: info)
   ir.patch patchPos
 
 proc toPackedNodeIgnoreProcDefs(n: PNode, encoder: var PackedEncoder; m: var PackedModule) =
@@ -582,20 +565,6 @@ proc toRodFile*(conf: ConfigRef; f: AbsoluteFile; ext = RodExt): AbsoluteFile =
   result = changeFileExt(completeGeneratedFilePath(conf,
     mangleModuleName(conf, f).AbsoluteFile), ext)
 
-const
-  BenchIC* = false
-
-when BenchIC:
-  var gloadBodies: MonoTime
-
-  template bench(x, body) =
-    let start = getMonoTime()
-    body
-    x = x + (getMonoTime() - start)
-
-else:
-  template bench(x, body) = body
-
 proc loadRodFile*(filename: AbsoluteFile; m: var PackedModule; config: ConfigRef;
                   ignoreConfig = false): RodFileError =
   var f = rodfiles.open(filename.string)
@@ -613,10 +582,6 @@ proc loadRodFile*(filename: AbsoluteFile; m: var PackedModule; config: ConfigRef
     f.loadSection section
     f.loadSeq data
 
-  template loadTableSection(section, data) {.dirty.} =
-    f.loadSection section
-    f.loadOrderedTable data
-
   template loadTabSection(section, data) {.dirty.} =
     f.loadSection section
     f.load data
@@ -624,48 +589,40 @@ proc loadRodFile*(filename: AbsoluteFile; m: var PackedModule; config: ConfigRef
   loadTabSection stringsSection, m.strings
 
   loadSeqSection checkSumsSection, m.includes
-  if config.cmd != cmdM and not includesIdentical(m, config):
+  if not includesIdentical(m, config):
     f.err = includeFileChanged
 
   loadSeqSection depsSection, m.imports
 
-  bench gloadBodies:
+  loadTabSection numbersSection, m.numbers
 
-    loadTabSection numbersSection, m.numbers
+  loadSeqSection exportsSection, m.exports
+  loadSeqSection hiddenSection, m.hidden
+  loadSeqSection reexportsSection, m.reexports
 
-    loadSeqSection exportsSection, m.exports
-    loadSeqSection hiddenSection, m.hidden
-    loadSeqSection reexportsSection, m.reexports
+  loadSeqSection compilerProcsSection, m.compilerProcs
 
-    loadSeqSection compilerProcsSection, m.compilerProcs
+  loadSeqSection trmacrosSection, m.trmacros
 
-    loadSeqSection trmacrosSection, m.trmacros
+  loadSeqSection convertersSection, m.converters
+  loadSeqSection methodsSection, m.methods
+  loadSeqSection pureEnumsSection, m.pureEnums
 
-    loadSeqSection convertersSection, m.converters
-    loadSeqSection methodsSection, m.methods
-    loadSeqSection pureEnumsSection, m.pureEnums
+  loadSeqSection toReplaySection, m.toReplay.nodes
+  loadSeqSection topLevelSection, m.topLevel.nodes
+  loadSeqSection bodiesSection, m.bodies.nodes
+  loadSeqSection symsSection, m.syms
+  loadSeqSection typesSection, m.types
 
-    loadTabSection toReplaySection, m.toReplay
-    loadTabSection topLevelSection, m.topLevel
+  loadSeqSection typeInstCacheSection, m.typeInstCache
+  loadSeqSection procInstCacheSection, m.procInstCache
+  loadSeqSection attachedOpsSection, m.attachedOps
+  loadSeqSection methodsPerTypeSection, m.methodsPerType
+  loadSeqSection enumToStringProcsSection, m.enumToStringProcs
+  loadSeqSection typeInfoSection, m.emittedTypeInfo
 
-    loadTabSection bodiesSection, m.bodies
-    loadTableSection symsSection, m.syms
-    loadTableSection typesSection, m.types
-
-    loadSeqSection typeInstCacheSection, m.typeInstCache
-    loadSeqSection procInstCacheSection, m.procInstCache
-    loadSeqSection attachedOpsSection, m.attachedOps
-    loadSeqSection methodsPerGenericTypeSection, m.methodsPerGenericType
-    loadSeqSection enumToStringProcsSection, m.enumToStringProcs
-    loadSeqSection methodsPerTypeSection, m.methodsPerType
-    loadSeqSection dispatchersSection, m.dispatchers
-    loadSeqSection typeInfoSection, m.emittedTypeInfo
-
-    f.loadSection backendFlagsSection
-    f.loadPrim m.backendFlags
-
-    f.loadSection sideChannelSection
-  f.load m.man
+  f.loadSection backendFlagsSection
+  f.loadPrim m.backendFlags
 
   close(f)
   result = f.err
@@ -695,10 +652,6 @@ proc saveRodFile*(filename: AbsoluteFile; encoder: var PackedEncoder; m: var Pac
     f.storeSection section
     f.store data
 
-  template storeTableSection(section, data) {.dirty.} =
-    f.storeSection section
-    f.storeOrderedTable data
-
   storeTabSection stringsSection, m.strings
 
   storeSeqSection checkSumsSection, m.includes
@@ -718,29 +671,24 @@ proc saveRodFile*(filename: AbsoluteFile; encoder: var PackedEncoder; m: var Pac
   storeSeqSection methodsSection, m.methods
   storeSeqSection pureEnumsSection, m.pureEnums
 
-  storeTabSection toReplaySection, m.toReplay
-  storeTabSection topLevelSection, m.topLevel
+  storeSeqSection toReplaySection, m.toReplay.nodes
+  storeSeqSection topLevelSection, m.topLevel.nodes
 
-  storeTabSection bodiesSection, m.bodies
-  storeTableSection symsSection, m.syms
+  storeSeqSection bodiesSection, m.bodies.nodes
+  storeSeqSection symsSection, m.syms
 
-  storeTableSection typesSection, m.types
+  storeSeqSection typesSection, m.types
 
   storeSeqSection typeInstCacheSection, m.typeInstCache
   storeSeqSection procInstCacheSection, m.procInstCache
   storeSeqSection attachedOpsSection, m.attachedOps
-  storeSeqSection methodsPerGenericTypeSection, m.methodsPerGenericType
-  storeSeqSection enumToStringProcsSection, m.enumToStringProcs
   storeSeqSection methodsPerTypeSection, m.methodsPerType
-  storeSeqSection dispatchersSection, m.dispatchers
+  storeSeqSection enumToStringProcsSection, m.enumToStringProcs
   storeSeqSection typeInfoSection, m.emittedTypeInfo
 
   f.storeSection backendFlagsSection
   f.storePrim m.backendFlags
 
-  f.storeSection sideChannelSection
-  f.store m.man
-
   close(f)
   encoder.disable()
   if f.err != ok:
@@ -775,36 +723,20 @@ type
     status*: ModuleStatus
     symsInit, typesInit, loadedButAliveSetChanged*: bool
     fromDisk*: PackedModule
-    syms: OrderedTable[int32, PSym] # indexed by itemId
-    types: OrderedTable[int32, PType]
+    syms: seq[PSym] # indexed by itemId
+    types: seq[PType]
     module*: PSym # the one true module symbol.
     iface, ifaceHidden: Table[PIdent, seq[PackedItemId]]
       # PackedItemId so that it works with reexported symbols too
       # ifaceHidden includes private symbols
 
-type
-  PackedModuleGraph* = object
-    pm*: seq[LoadedModule] # indexed by FileIndex
-    when BenchIC:
-      depAnalysis: MonoTime
-      loadBody: MonoTime
-      loadSym, loadType, loadBodies: MonoTime
-
-when BenchIC:
-  proc echoTimes*(m: PackedModuleGraph) =
-    echo "analysis: ", m.depAnalysis, " loadBody: ", m.loadBody, " loadSym: ",
-      m.loadSym, " loadType: ", m.loadType, " all bodies: ", gloadBodies
-
-template `[]`*(m: PackedModuleGraph; i: int): LoadedModule = m.pm[i]
-template len*(m: PackedModuleGraph): int = m.pm.len
+  PackedModuleGraph* = seq[LoadedModule] # indexed by FileIndex
 
 proc loadType(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int; t: PackedItemId): PType
 proc loadSym(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int; s: PackedItemId): PSym
 
 proc toFileIndexCached*(c: var PackedDecoder; g: PackedModuleGraph; thisModule: int; f: LitId): FileIndex =
-  if f == LitId(0):
-    result = InvalidFileIdx
-  elif c.lastLit == f and c.lastModule == thisModule:
+  if c.lastLit == f and c.lastModule == thisModule:
     result = c.lastFile
   else:
     result = toFileIndex(f, g[thisModule].fromDisk, c.config)
@@ -815,9 +747,8 @@ proc toFileIndexCached*(c: var PackedDecoder; g: PackedModuleGraph; thisModule:
 proc translateLineInfo(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int;
                        x: PackedLineInfo): TLineInfo =
   assert g[thisModule].status in {loaded, storing, stored}
-  let (fileId, line, col) = unpack(g[thisModule].fromDisk.man, x)
-  result = TLineInfo(line: line.uint16, col: col.int16,
-            fileIndex: toFileIndexCached(c, g, thisModule, fileId))
+  result = TLineInfo(line: x.line, col: x.col,
+            fileIndex: toFileIndexCached(c, g, thisModule, x.file))
 
 proc loadNodes*(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int;
                 tree: PackedTree; n: NodePos): PNode =
@@ -831,14 +762,14 @@ proc loadNodes*(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int;
   result.flags = n.flags
 
   case k
-  of nkNone, nkEmpty, nkNilLit, nkType:
+  of nkEmpty, nkNilLit, nkType:
     discard
   of nkIdent:
     result.ident = getIdent(c.cache, g[thisModule].fromDisk.strings[n.litId])
   of nkSym:
-    result.sym = loadSym(c, g, thisModule, PackedItemId(module: LitId(0), item: tree[n].soperand))
-    if result.typ == nil:
-      result.typ = result.sym.typ
+    result.sym = loadSym(c, g, thisModule, PackedItemId(module: LitId(0), item: tree.nodes[n.int].operand))
+  of directIntLit:
+    result.intVal = tree.nodes[n.int].operand
   of externIntLit:
     result.intVal = g[thisModule].fromDisk.numbers[n.litId]
   of nkStrLit..nkTripleStrLit:
@@ -847,12 +778,10 @@ proc loadNodes*(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int;
     result.floatVal = cast[BiggestFloat](g[thisModule].fromDisk.numbers[n.litId])
   of nkModuleRef:
     let (n1, n2) = sons2(tree, n)
-    assert n1.kind == nkNone
-    assert n2.kind == nkNone
+    assert n1.kind == nkInt32Lit
+    assert n2.kind == nkInt32Lit
     transitionNoneToSym(result)
-    result.sym = loadSym(c, g, thisModule, PackedItemId(module: n1.litId, item: tree[n2].soperand))
-    if result.typ == nil:
-      result.typ = result.sym.typ
+    result.sym = loadSym(c, g, thisModule, PackedItemId(module: n1.litId, item: tree.nodes[n2.int].operand))
   else:
     for n0 in sonsReadonly(tree, n):
       result.addAllowNil loadNodes(c, g, thisModule, tree, n0)
@@ -945,35 +874,20 @@ proc symBodyFromPacked(c: var PackedDecoder; g: var PackedModuleGraph;
   result.owner = loadSym(c, g, si, s.owner)
   let externalName = g[si].fromDisk.strings[s.externalName]
   if externalName != "":
-    result.loc.snippet = externalName
+    result.loc.r = rope externalName
   result.loc.flags = s.locFlags
-  result.instantiatedFrom = loadSym(c, g, si, s.instantiatedFrom)
-
-proc needsRecompile(g: var PackedModuleGraph; conf: ConfigRef; cache: IdentCache;
-                    fileIdx: FileIndex; cachedModules: var seq[FileIndex]): bool
-proc loadToReplayNodes(g: var PackedModuleGraph; conf: ConfigRef; cache: IdentCache;
-                       fileIdx: FileIndex; m: var LoadedModule)
 
 proc loadSym(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int; s: PackedItemId): PSym =
   if s == nilItemId:
     result = nil
   else:
     let si = moduleIndex(c, g, thisModule, s)
-    if si >= g.len:
-      g.pm.setLen(si+1)
-
-    if g[si].status == undefined and c.config.cmd == cmdM:
-      var cachedModules: seq[FileIndex] = @[]
-      discard needsRecompile(g, c.config, c.cache, FileIndex(si), cachedModules)
-      for m in cachedModules:
-        loadToReplayNodes(g, c.config, c.cache, m, g[int m])
-
     assert g[si].status in {loaded, storing, stored}
-    #if not g[si].symsInit:
-    #  g[si].symsInit = true
-    #  setLen g[si].syms, g[si].fromDisk.syms.len
+    if not g[si].symsInit:
+      g[si].symsInit = true
+      setLen g[si].syms, g[si].fromDisk.syms.len
 
-    if g[si].syms.getOrDefault(s.item) == nil:
+    if g[si].syms[s.item] == nil:
       if g[si].fromDisk.syms[s.item].kind != skModule:
         result = symHeaderFromPacked(c, g, g[si].fromDisk.syms[s.item], si, s.item)
         # store it here early on, so that recursions work properly:
@@ -982,7 +896,6 @@ proc loadSym(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int; s:
       else:
         result = g[si].module
         assert result != nil
-        g[si].syms[s.item] = result
 
     else:
       result = g[si].syms[s.item]
@@ -1003,10 +916,8 @@ proc typeBodyFromPacked(c: var PackedDecoder; g: var PackedModuleGraph;
     for op, item in pairs t.attachedOps:
       result.attachedOps[op] = loadSym(c, g, si, item)
   result.typeInst = loadType(c, g, si, t.typeInst)
-  var sons = newSeq[PType]()
   for son in items t.types:
-    sons.add loadType(c, g, si, son)
-  result.setSons(sons)
+    result.addSon loadType(c, g, si, son)
   loadAstBody(t, n)
   when false:
     for gen, id in items t.methods:
@@ -1020,20 +931,18 @@ proc loadType(c: var PackedDecoder; g: var PackedModuleGraph; thisModule: int; t
     assert g[si].status in {loaded, storing, stored}
     assert t.item > 0
 
-    #if not g[si].typesInit:
-    #  g[si].typesInit = true
-    #  setLen g[si].types, g[si].fromDisk.types.len
+    if not g[si].typesInit:
+      g[si].typesInit = true
+      setLen g[si].types, g[si].fromDisk.types.len
 
-    if g[si].types.getOrDefault(t.item) == nil:
+    if g[si].types[t.item] == nil:
       result = typeHeaderFromPacked(c, g, g[si].fromDisk.types[t.item], si, t.item)
       # store it here early on, so that recursions work properly:
       g[si].types[t.item] = result
       typeBodyFromPacked(c, g, g[si].fromDisk.types[t.item], si, t.item, result)
-      #assert result.itemId.item == t.item, $(result.itemId.item, t.item)
-      assert result.itemId.item > 0, $(result.itemId.item, t.item)
     else:
       result = g[si].types[t.item]
-      assert result.itemId.item > 0, "2"
+    assert result.itemId.item > 0
 
 proc setupLookupTables(g: var PackedModuleGraph; conf: ConfigRef; cache: IdentCache;
                        fileIdx: FileIndex; m: var LoadedModule) =
@@ -1083,37 +992,30 @@ proc needsRecompile(g: var PackedModuleGraph; conf: ConfigRef; cache: IdentCache
   # Does the file belong to the fileIdx need to be recompiled?
   let m = int(fileIdx)
   if m >= g.len:
-    g.pm.setLen(m+1)
+    g.setLen(m+1)
 
   case g[m].status
   of undefined:
     g[m].status = loading
     let fullpath = msgs.toFullPath(conf, fileIdx)
     let rod = toRodFile(conf, AbsoluteFile fullpath)
-    let err = loadRodFile(rod, g[m].fromDisk, conf, ignoreConfig = conf.cmd == cmdM)
+    let err = loadRodFile(rod, g[m].fromDisk, conf)
     if err == ok:
-      if conf.cmd == cmdM:
+      result = optForceFullMake in conf.globalOptions
+      # check its dependencies:
+      for dep in g[m].fromDisk.imports:
+        let fid = toFileIndex(dep, g[m].fromDisk, conf)
+        # Warning: we need to traverse the full graph, so
+        # do **not use break here**!
+        if needsRecompile(g, conf, cache, fid, cachedModules):
+          result = true
+
+      if not result:
         setupLookupTables(g, conf, cache, fileIdx, g[m])
         cachedModules.add fileIdx
         g[m].status = loaded
-        result = false
       else:
-        result = optForceFullMake in conf.globalOptions
-        # check its dependencies:
-        let imp = g[m].fromDisk.imports
-        for dep in imp:
-          let fid = toFileIndex(dep, g[m].fromDisk, conf)
-          # Warning: we need to traverse the full graph, so
-          # do **not use break here**!
-          if needsRecompile(g, conf, cache, fid, cachedModules):
-            result = true
-
-        if not result:
-          setupLookupTables(g, conf, cache, fileIdx, g[m])
-          cachedModules.add fileIdx
-          g[m].status = loaded
-        else:
-          g.pm[m] = LoadedModule(status: outdated, module: g[m].module)
+        g[m] = LoadedModule(status: outdated, module: g[m].module)
     else:
       loadError(err, rod, conf)
       g[m].status = outdated
@@ -1128,13 +1030,12 @@ proc needsRecompile(g: var PackedModuleGraph; conf: ConfigRef; cache: IdentCache
 proc moduleFromRodFile*(g: var PackedModuleGraph; conf: ConfigRef; cache: IdentCache;
                         fileIdx: FileIndex; cachedModules: var seq[FileIndex]): PSym =
   ## Returns 'nil' if the module needs to be recompiled.
-  bench g.depAnalysis:
-    if needsRecompile(g, conf, cache, fileIdx, cachedModules):
-      result = nil
-    else:
-      result = g[int fileIdx].module
-      assert result != nil
-      assert result.position == int(fileIdx)
+  if needsRecompile(g, conf, cache, fileIdx, cachedModules):
+    result = nil
+  else:
+    result = g[int fileIdx].module
+    assert result != nil
+    assert result.position == int(fileIdx)
   for m in cachedModules:
     loadToReplayNodes(g, conf, cache, m, g[int m])
 
@@ -1148,43 +1049,46 @@ template setupDecoder() {.dirty.} =
 
 proc loadProcBody*(config: ConfigRef, cache: IdentCache;
                    g: var PackedModuleGraph; s: PSym): PNode =
-  bench g.loadBody:
-    let mId = s.itemId.module
+  let mId = s.itemId.module
+  var decoder = PackedDecoder(
+    lastModule: int32(-1),
+    lastLit: LitId(0),
+    lastFile: FileIndex(-1),
+    config: config,
+    cache: cache)
+  let pos = g[mId].fromDisk.syms[s.itemId.item].ast
+  assert pos != emptyNodeId
+  result = loadProcBody(decoder, g, mId, g[mId].fromDisk.bodies, NodePos pos)
+
+proc loadTypeFromId*(config: ConfigRef, cache: IdentCache;
+                     g: var PackedModuleGraph; module: int; id: PackedItemId): PType =
+  if id.item < g[module].types.len:
+    result = g[module].types[id.item]
+  else:
+    result = nil
+  if result == nil:
     var decoder = PackedDecoder(
       lastModule: int32(-1),
       lastLit: LitId(0),
       lastFile: FileIndex(-1),
       config: config,
       cache: cache)
-    let pos = g[mId].fromDisk.syms[s.itemId.item].ast
-    assert pos != emptyNodeId
-    result = loadProcBody(decoder, g, mId, g[mId].fromDisk.bodies, NodePos pos)
-
-proc loadTypeFromId*(config: ConfigRef, cache: IdentCache;
-                     g: var PackedModuleGraph; module: int; id: PackedItemId): PType =
-  bench g.loadType:
-    result = g[module].types.getOrDefault(id.item)
-    if result == nil:
-      var decoder = PackedDecoder(
-        lastModule: int32(-1),
-        lastLit: LitId(0),
-        lastFile: FileIndex(-1),
-        config: config,
-        cache: cache)
-      result = loadType(decoder, g, module, id)
+    result = loadType(decoder, g, module, id)
 
 proc loadSymFromId*(config: ConfigRef, cache: IdentCache;
                     g: var PackedModuleGraph; module: int; id: PackedItemId): PSym =
-  bench g.loadSym:
-    result = g[module].syms.getOrDefault(id.item)
-    if result == nil:
-      var decoder = PackedDecoder(
-        lastModule: int32(-1),
-        lastLit: LitId(0),
-        lastFile: FileIndex(-1),
-        config: config,
-        cache: cache)
-      result = loadSym(decoder, g, module, id)
+  if id.item < g[module].syms.len:
+    result = g[module].syms[id.item]
+  else:
+    result = nil
+  if result == nil:
+    var decoder = PackedDecoder(
+      lastModule: int32(-1),
+      lastLit: LitId(0),
+      lastFile: FileIndex(-1),
+      config: config,
+      cache: cache)
+    result = loadSym(decoder, g, module, id)
 
 proc translateId*(id: PackedItemId; g: PackedModuleGraph; thisModule: int; config: ConfigRef): ItemId =
   if id.module == LitId(0):
@@ -1192,6 +1096,19 @@ proc translateId*(id: PackedItemId; g: PackedModuleGraph; thisModule: int; confi
   else:
     ItemId(module: toFileIndex(id.module, g[thisModule].fromDisk, config).int32, item: id.item)
 
+proc checkForHoles(m: PackedModule; config: ConfigRef; moduleId: int) =
+  var bugs = 0
+  for i in 1 .. high(m.syms):
+    if m.syms[i].kind == skUnknown:
+      echo "EMPTY ID ", i, " module ", moduleId, " ", toFullPath(config, FileIndex(moduleId))
+      inc bugs
+  assert bugs == 0
+  when false:
+    var nones = 0
+    for i in 1 .. high(m.types):
+      inc nones, m.types[i].kind == tyNone
+    assert nones < 1
+
 proc simulateLoadedModule*(g: var PackedModuleGraph; conf: ConfigRef; cache: IdentCache;
                            moduleSym: PSym; m: PackedModule) =
   # For now only used for heavy debugging. In the future we could use this to reduce the
@@ -1235,7 +1152,7 @@ proc initRodIter*(it: var RodIter; config: ConfigRef, cache: IdentCache;
     result = nil
 
 proc initRodIterAllSyms*(it: var RodIter; config: ConfigRef, cache: IdentCache;
-                         g: var PackedModuleGraph; module: FileIndex; importHidden: bool): PSym =
+                         g: var PackedModuleGraph; module: FileIndex, importHidden: bool): PSym =
   it.decoder = PackedDecoder(
     lastModule: int32(-1),
     lastLit: LitId(0),
@@ -1296,7 +1213,7 @@ proc rodViewer*(rodfile: AbsoluteFile; config: ConfigRef, cache: IdentCache) =
   if err != ok:
     config.quitOrRaise "Error: could not load: " & $rodfile.string & " reason: " & $err
 
-  when false:
+  when true:
     echo "exports:"
     for ex in m.exports:
       echo "  ", m.strings[ex[0]], " local ID: ", ex[1]
@@ -1312,32 +1229,13 @@ proc rodViewer*(rodfile: AbsoluteFile; config: ConfigRef, cache: IdentCache) =
     for ex in m.hidden:
       echo "  ", m.strings[ex[0]], " local ID: ", ex[1]
 
-  when false:
-    echo "all symbols"
-    for i in 0..high(m.syms):
-      if m.syms[i].name != LitId(0):
-        echo "  ", m.strings[m.syms[i].name], " local ID: ", i, " kind ", m.syms[i].kind
-      else:
-        echo "  <anon symbol?> local ID: ", i, " kind ", m.syms[i].kind
+  echo "all symbols"
+  for i in 0..high(m.syms):
+    if m.syms[i].name != LitId(0):
+      echo "  ", m.strings[m.syms[i].name], " local ID: ", i, " kind ", m.syms[i].kind
+    else:
+      echo "  <anon symbol?> local ID: ", i, " kind ", m.syms[i].kind
 
   echo "symbols: ", m.syms.len, " types: ", m.types.len,
-    " top level nodes: ", m.topLevel.len, " other nodes: ", m.bodies.len,
+    " top level nodes: ", m.topLevel.nodes.len, " other nodes: ", m.bodies.nodes.len,
     " strings: ", m.strings.len, " numbers: ", m.numbers.len
-
-  echo "SIZES:"
-  echo "symbols: ", m.syms.len * sizeof(PackedSym), " types: ", m.types.len * sizeof(PackedType),
-    " top level nodes: ", m.topLevel.len * sizeof(PackedNode),
-    " other nodes: ", m.bodies.len * sizeof(PackedNode),
-    " strings: ", sizeOnDisc(m.strings)
-  when false:
-    var tt = 0
-    var fc = 0
-    for x in m.topLevel:
-      if x.kind == nkSym or x.typeId == nilItemId: inc tt
-      if x.flags == {}: inc fc
-    for x in m.bodies:
-      if x.kind == nkSym or x.typeId == nilItemId: inc tt
-      if x.flags == {}: inc fc
-    let total = float(m.topLevel.len + m.bodies.len)
-    echo "nodes with nil type: ", tt, " in % ", tt.float / total
-    echo "nodes with empty flags: ", fc.float / total

compiler/ic/iclineinfos.nim

@@ -1,84 +0,0 @@
-#
-#
-#           The Nim Compiler
-#        (c) Copyright 2024 Andreas Rumpf
-#
-#    See the file "copying.txt", included in this
-#    distribution, for details about the copyright.
-#
-
-# For the line information we use 32 bits. They are used as follows:
-# Bit 0 (AsideBit): If we have inline line information or not. If not, the
-# remaining 31 bits are used as an index into a seq[(LitId, int, int)].
-#
-# We use 10 bits for the "file ID", this means a program can consist of as much
-# as 1024 different files. (If it uses more files than that, the overflow bit
-# would be set.)
-# This means we have 21 bits left to encode the (line, col) pair. We use 7 bits for the column
-# so 128 is the limit and 14 bits for the line number.
-# The packed representation supports files with up to 16384 lines.
-# Keep in mind that whenever any limit is reached the AsideBit is set and the real line
-# information is kept in a side channel.
-
-import std / assertions
-
-const
-  AsideBit = 1
-  FileBits = 10
-  LineBits = 14
-  ColBits = 7
-  FileMax = (1 shl FileBits) - 1
-  LineMax = (1 shl LineBits) - 1
-  ColMax = (1 shl ColBits) - 1
-
-static:
-  assert AsideBit + FileBits + LineBits + ColBits == 32
-
-import .. / ic / [bitabs, rodfiles] # for LitId
-
-type
-  PackedLineInfo* = distinct uint32
-
-  LineInfoManager* = object
-    aside: seq[(LitId, int32, int32)]
-
-const
-  NoLineInfo* = PackedLineInfo(0'u32)
-
-proc pack*(m: var LineInfoManager; file: LitId; line, col: int32): PackedLineInfo =
-  if file.uint32 <= FileMax.uint32 and line <= LineMax and col <= ColMax:
-    let col = if col < 0'i32: 0'u32 else: col.uint32
-    let line = if line < 0'i32: 0'u32 else: line.uint32
-    # use inline representation:
-    result = PackedLineInfo((file.uint32 shl 1'u32) or (line shl uint32(AsideBit + FileBits)) or
-      (col shl uint32(AsideBit + FileBits + LineBits)))
-  else:
-    result = PackedLineInfo((m.aside.len shl 1) or AsideBit)
-    m.aside.add (file, line, col)
-
-proc unpack*(m: LineInfoManager; i: PackedLineInfo): (LitId, int32, int32) =
-  let i = i.uint32
-  if (i and 1'u32) == 0'u32:
-    # inline representation:
-    result = (LitId((i shr 1'u32) and FileMax.uint32),
-      int32((i shr uint32(AsideBit + FileBits)) and LineMax.uint32),
-      int32((i shr uint32(AsideBit + FileBits + LineBits)) and ColMax.uint32))
-  else:
-    result = m.aside[int(i shr 1'u32)]
-
-proc getFileId*(m: LineInfoManager; i: PackedLineInfo): LitId =
-  result = unpack(m, i)[0]
-
-proc store*(r: var RodFile; m: LineInfoManager) = storeSeq(r, m.aside)
-proc load*(r: var RodFile; m: var LineInfoManager) = loadSeq(r, m.aside)
-
-when isMainModule:
-  var m = LineInfoManager(aside: @[])
-  for i in 0'i32..<16388'i32:
-    for col in 0'i32..<100'i32:
-      let packed = pack(m, LitId(1023), i, col)
-      let u = unpack(m, packed)
-      assert u[0] == LitId(1023)
-      assert u[1] == i
-      assert u[2] == col
-  echo m.aside.len

compiler/ic/integrity.nim

@@ -10,7 +10,7 @@
 ## Integrity checking for a set of .rod files.
 ## The set must cover a complete Nim project.
 
-import std/[sets, tables]
+import sets
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -72,16 +72,15 @@ proc checkForeignSym(c: var CheckedContext; symId: PackedItemId) =
     c.thisModule = oldThisModule
 
 proc checkNode(c: var CheckedContext; tree: PackedTree; n: NodePos) =
-  let t = findType(tree, n)
-  if t != nilItemId:
-    checkType(c, t)
+  if tree[n.int].typeId != nilItemId:
+    checkType(c, tree[n.int].typeId)
   case n.kind
   of nkEmpty, nkNilLit, nkType, nkNilRodNode:
     discard
   of nkIdent:
     assert c.g.packed[c.thisModule].fromDisk.strings.hasLitId n.litId
   of nkSym:
-    checkLocalSym(c, tree[n].soperand)
+    checkLocalSym(c, tree.nodes[n.int].operand)
   of directIntLit:
     discard
   of externIntLit, nkFloatLit..nkFloat128Lit:
@@ -90,9 +89,9 @@ proc checkNode(c: var CheckedContext; tree: PackedTree; n: NodePos) =
     assert c.g.packed[c.thisModule].fromDisk.strings.hasLitId n.litId
   of nkModuleRef:
     let (n1, n2) = sons2(tree, n)
-    assert n1.kind == nkNone
-    assert n2.kind == nkNone
-    checkForeignSym(c, PackedItemId(module: n1.litId, item: tree[n2].soperand))
+    assert n1.kind == nkInt32Lit
+    assert n2.kind == nkInt32Lit
+    checkForeignSym(c, PackedItemId(module: n1.litId, item: tree.nodes[n2.int].operand))
   else:
     for n0 in sonsReadonly(tree, n):
       checkNode(c, tree, n0)
@@ -108,18 +107,18 @@ proc checkModule(c: var CheckedContext; m: PackedModule) =
   # We check that:
   # - Every symbol references existing types and symbols.
   # - Every tree node references existing types and symbols.
-  for _, v in pairs(m.syms):
-    checkLocalSym c, v.id
+  for i in 0..high(m.syms):
+    checkLocalSym c, int32(i)
 
   checkTree c, m.toReplay
   checkTree c, m.topLevel
 
   for e in m.exports:
-    #assert e[1] >= 0 and e[1] < m.syms.len
+    assert e[1] >= 0 and e[1] < m.syms.len
     assert e[0] == m.syms[e[1]].name
 
   for e in m.compilerProcs:
-    #assert e[1] >= 0 and e[1] < m.syms.len
+    assert e[1] >= 0 and e[1] < m.syms.len
     assert e[0] == m.syms[e[1]].name
 
   checkLocalSymIds c, m, m.converters
@@ -135,15 +134,13 @@ proc checkModule(c: var CheckedContext; m: PackedModule) =
     typeInstCache*: seq[(PackedItemId, PackedItemId)]
     procInstCache*: seq[PackedInstantiation]
     attachedOps*: seq[(TTypeAttachedOp, PackedItemId, PackedItemId)]
-    methodsPerGenericType*: seq[(PackedItemId, int, PackedItemId)]
+    methodsPerType*: seq[(PackedItemId, int, PackedItemId)]
     enumToStringProcs*: seq[(PackedItemId, PackedItemId)]
-    methodsPerType*: seq[(PackedItemId, PackedItemId)]
-    dispatchers*: seq[PackedItemId]
   ]#
 
 proc checkIntegrity*(g: ModuleGraph) =
   var c = CheckedContext(g: g)
-  for i in 0..<len(g.packed):
+  for i in 0..high(g.packed):
     # case statement here to enforce exhaustive checks.
     case g.packed[i].status
     of undefined:
@@ -153,3 +150,4 @@ proc checkIntegrity*(g: ModuleGraph) =
     of stored, storing, outdated, loaded:
       c.thisModule = int32 i
       checkModule(c, g.packed[i].fromDisk)
+

compiler/ic/navigator.nim

@@ -11,34 +11,29 @@
 ## IDE-like features. It uses the set of .rod files to accomplish
 ## its task. The set must cover a complete Nim project.
 
-import std/[sets, tables]
+import sets
 
-from std/os import nil
+from os import nil
 from std/private/miscdollars import toLocation
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
 
 import ".." / [ast, modulegraphs, msgs, options]
-import iclineinfos
 import packed_ast, bitabs, ic
 
 type
-  UnpackedLineInfo = object
-    file: LitId
-    line, col: int
   NavContext = object
     g: ModuleGraph
     thisModule: int32
-    trackPos: UnpackedLineInfo
+    trackPos: PackedLineInfo
     alreadyEmitted: HashSet[string]
     outputSep: char # for easier testing, use short filenames and spaces instead of tabs.
 
-proc isTracked(man: LineInfoManager; current: PackedLineInfo, trackPos: UnpackedLineInfo, tokenLen: int): bool =
-  let (currentFile, currentLine, currentCol) = man.unpack(current)
-  if currentFile == trackPos.file and currentLine == trackPos.line:
+proc isTracked(current, trackPos: PackedLineInfo, tokenLen: int): bool =
+  if current.file == trackPos.file and current.line == trackPos.line:
     let col = trackPos.col
-    if col >= currentCol and col < currentCol+tokenLen:
+    if col >= current.col and col < current.col+tokenLen:
       result = true
     else:
       result = false
@@ -47,34 +42,32 @@ proc isTracked(man: LineInfoManager; current: PackedLineInfo, trackPos: Unpacked
 
 proc searchLocalSym(c: var NavContext; s: PackedSym; info: PackedLineInfo): bool =
   result = s.name != LitId(0) and
-    isTracked(c.g.packed[c.thisModule].fromDisk.man, info, c.trackPos, c.g.packed[c.thisModule].fromDisk.strings[s.name].len)
+    isTracked(info, c.trackPos, c.g.packed[c.thisModule].fromDisk.strings[s.name].len)
 
 proc searchForeignSym(c: var NavContext; s: ItemId; info: PackedLineInfo): bool =
   let name = c.g.packed[s.module].fromDisk.syms[s.item].name
   result = name != LitId(0) and
-    isTracked(c.g.packed[c.thisModule].fromDisk.man, info, c.trackPos, c.g.packed[s.module].fromDisk.strings[name].len)
+    isTracked(info, c.trackPos, c.g.packed[s.module].fromDisk.strings[name].len)
 
 const
   EmptyItemId = ItemId(module: -1'i32, item: -1'i32)
 
 proc search(c: var NavContext; tree: PackedTree): ItemId =
   # We use the linear representation here directly:
-  for i in 0..<len(tree):
-    let i = NodePos(i)
-    case tree[i].kind
+  for i in 0..high(tree.nodes):
+    case tree.nodes[i].kind
     of nkSym:
-      let item = tree[i].soperand
-      if searchLocalSym(c, c.g.packed[c.thisModule].fromDisk.syms[item], tree[i].info):
+      let item = tree.nodes[i].operand
+      if searchLocalSym(c, c.g.packed[c.thisModule].fromDisk.syms[item], tree.nodes[i].info):
         return ItemId(module: c.thisModule, item: item)
     of nkModuleRef:
-      let (currentFile, currentLine, currentCol) = c.g.packed[c.thisModule].fromDisk.man.unpack(tree[i].info)
-      if currentLine == c.trackPos.line and currentFile == c.trackPos.file:
-        let (n1, n2) = sons2(tree, i)
+      if tree.nodes[i].info.line == c.trackPos.line and tree.nodes[i].info.file == c.trackPos.file:
+        let (n1, n2) = sons2(tree, NodePos i)
         assert n1.kind == nkInt32Lit
         assert n2.kind == nkInt32Lit
-        let pId = PackedItemId(module: n1.litId, item: tree[n2].soperand)
+        let pId = PackedItemId(module: n1.litId, item: tree.nodes[n2.int].operand)
         let itemId = translateId(pId, c.g.packed, c.thisModule, c.g.config)
-        if searchForeignSym(c, itemId, tree[i].info):
+        if searchForeignSym(c, itemId, tree.nodes[i].info):
           return itemId
     else: discard
   return EmptyItemId
@@ -84,38 +77,36 @@ proc isDecl(tree: PackedTree; n: NodePos): bool =
   const declarativeNodes = procDefs + {nkMacroDef, nkTemplateDef,
     nkLetSection, nkVarSection, nkUsingStmt, nkConstSection, nkTypeSection,
     nkIdentDefs, nkEnumTy, nkVarTuple}
-  result = n.int >= 0 and tree[n].kind in declarativeNodes
+  result = n.int >= 0 and tree[n.int].kind in declarativeNodes
 
 proc usage(c: var NavContext; info: PackedLineInfo; isDecl: bool) =
-  let (fileId, line, col) = unpack(c.g.packed[c.thisModule].fromDisk.man, info)
   var m = ""
-  var file = c.g.packed[c.thisModule].fromDisk.strings[fileId]
+  var file = c.g.packed[c.thisModule].fromDisk.strings[info.file]
   if c.outputSep == ' ':
     file = os.extractFilename file
-  toLocation(m, file, line, col + ColOffset)
+  toLocation(m, file, info.line.int, info.col.int + ColOffset)
   if not c.alreadyEmitted.containsOrIncl(m):
     msgWriteln c.g.config, (if isDecl: "def" else: "usage") & c.outputSep & m
 
 proc list(c: var NavContext; tree: PackedTree; sym: ItemId) =
-  for i in 0..<len(tree):
-    let i = NodePos(i)
-    case tree[i].kind
+  for i in 0..high(tree.nodes):
+    case tree.nodes[i].kind
     of nkSym:
-      let item = tree[i].soperand
+      let item = tree.nodes[i].operand
       if sym.item == item and sym.module == c.thisModule:
-        usage(c, tree[i].info, isDecl(tree, parent(i)))
+        usage(c, tree.nodes[i].info, isDecl(tree, parent(NodePos i)))
     of nkModuleRef:
-      let (n1, n2) = sons2(tree, i)
-      assert n1.kind == nkNone
-      assert n2.kind == nkNone
-      let pId = PackedItemId(module: n1.litId, item: tree[n2].soperand)
+      let (n1, n2) = sons2(tree, NodePos i)
+      assert n1.kind == nkInt32Lit
+      assert n2.kind == nkInt32Lit
+      let pId = PackedItemId(module: n1.litId, item: tree.nodes[n2.int].operand)
       let itemId = translateId(pId, c.g.packed, c.thisModule, c.g.config)
       if itemId.item == sym.item and sym.module == itemId.module:
-        usage(c, tree[i].info, isDecl(tree, parent(i)))
+        usage(c, tree.nodes[i].info, isDecl(tree, parent(NodePos i)))
     else: discard
 
 proc searchForIncludeFile(g: ModuleGraph; fullPath: string): int =
-  for i in 0..<len(g.packed):
+  for i in 0..high(g.packed):
     for k in 1..high(g.packed[i].fromDisk.includes):
       # we start from 1 because the first "include" file is
       # the module's filename.
@@ -147,7 +138,7 @@ proc nav(g: ModuleGraph) =
   var c = NavContext(
     g: g,
     thisModule: int32 mid,
-    trackPos: UnpackedLineInfo(line: unpacked.line.int, col: unpacked.col.int, file: fileId),
+    trackPos: PackedLineInfo(line: unpacked.line, col: unpacked.col, file: fileId),
     outputSep: if isDefined(g.config, "nimIcNavigatorTests"): ' ' else: '\t'
   )
   var symId = search(c, g.packed[mid].fromDisk.topLevel)
@@ -158,7 +149,7 @@ proc nav(g: ModuleGraph) =
     localError(g.config, unpacked, "no symbol at this position")
     return
 
-  for i in 0..<len(g.packed):
+  for i in 0..high(g.packed):
     # case statement here to enforce exhaustive checks.
     case g.packed[i].status
     of undefined:
@@ -175,7 +166,7 @@ proc navUsages*(g: ModuleGraph) = nav(g)
 proc navDefusages*(g: ModuleGraph) = nav(g)
 
 proc writeRodFiles*(g: ModuleGraph) =
-  for i in 0..<len(g.packed):
+  for i in 0..high(g.packed):
     case g.packed[i].status
     of undefined, loading, stored, loaded:
       discard "nothing to do"

compiler/ic/packed_ast.nim

@@ -12,12 +12,10 @@
 ## use this representation directly in all the transformations,
 ## it is superior.
 
-import std/[hashes, tables, strtabs]
-import bitabs, rodfiles
+import hashes, tables, strtabs
+import bitabs
 import ".." / [ast, options]
 
-import iclineinfos
-
 when defined(nimPreviewSlimSystem):
   import std/assertions
 
@@ -33,12 +31,17 @@ type
     item*: int32         # same as the in-memory representation
 
 const
-  nilItemId* = PackedItemId(module: LitId(0), item: 0.int32)
+  nilItemId* = PackedItemId(module: LitId(0), item: -1.int32)
 
 const
   emptyNodeId* = NodeId(-1)
 
 type
+  PackedLineInfo* = object
+    line*: uint16
+    col*: int16
+    file*: LitId
+
   PackedLib* = object
     kind*: TLibKind
     generated*: bool
@@ -47,7 +50,6 @@ type
     path*: NodeId
 
   PackedSym* = object
-    id*: int32
     kind*: TSymKind
     name*: LitId
     typ*: PackedItemId
@@ -69,10 +71,8 @@ type
     when hasFFI:
       cname*: LitId
     constraint*: NodeId
-    instantiatedFrom*: PackedItemId
 
   PackedType* = object
-    id*: int32
     kind*: TTypeKind
     callConv*: TCallingConvention
     #nodekind*: TNodeKind
@@ -89,35 +89,23 @@ type
     typeInst*: PackedItemId
     nonUniqueId*: int32
 
-  PackedNode* = object     # 8 bytes
-    x: uint32
+  PackedNode* = object     # 28 bytes
+    kind*: TNodeKind
+    flags*: TNodeFlags
+    operand*: int32  # for kind in {nkSym, nkSymDef}: SymId
+                     # for kind in {nkStrLit, nkIdent, nkNumberLit}: LitId
+                     # for kind in nkInt32Lit: direct value
+                     # for non-atom kinds: the number of nodes (for easy skipping)
+    typeId*: PackedItemId
     info*: PackedLineInfo
 
   PackedTree* = object ## usually represents a full Nim module
-    nodes: seq[PackedNode]
-    withFlags: seq[(int32, TNodeFlags)]
-    withTypes: seq[(int32, PackedItemId)]
+    nodes*: seq[PackedNode]
 
   PackedInstantiation* = object
     key*, sym*: PackedItemId
     concreteTypes*: seq[PackedItemId]
 
-const
-  NodeKindBits = 8'u32
-  NodeKindMask = (1'u32 shl NodeKindBits) - 1'u32
-
-template kind*(n: PackedNode): TNodeKind = TNodeKind(n.x and NodeKindMask)
-template uoperand*(n: PackedNode): uint32 = (n.x shr NodeKindBits)
-template soperand*(n: PackedNode): int32 = int32(uoperand(n))
-
-template toX(k: TNodeKind; operand: uint32): uint32 =
-  uint32(k) or (operand shl NodeKindBits)
-
-template toX(k: TNodeKind; operand: LitId): uint32 =
-  uint32(k) or (operand.uint32 shl NodeKindBits)
-
-template typeId*(n: PackedNode): PackedItemId = n.typ
-
 proc `==`*(a, b: SymId): bool {.borrow.}
 proc hash*(a: SymId): Hash {.borrow.}
 
@@ -126,35 +114,71 @@ proc `==`*(a, b: NodePos): bool {.borrow.}
 proc `==`*(a, b: NodeId): bool {.borrow.}
 
 proc newTreeFrom*(old: PackedTree): PackedTree =
-  result = PackedTree(nodes: @[])
+  result.nodes = @[]
   when false: result.sh = old.sh
 
+when false:
+  proc declareSym*(tree: var PackedTree; kind: TSymKind;
+                  name: LitId; info: PackedLineInfo): SymId =
+    result = SymId(tree.sh.syms.len)
+    tree.sh.syms.add PackedSym(kind: kind, name: name, flags: {}, magic: mNone, info: info)
+
+  proc litIdFromName*(tree: PackedTree; name: string): LitId =
+    result = tree.sh.strings.getOrIncl(name)
+
+  proc add*(tree: var PackedTree; kind: TNodeKind; token: string; info: PackedLineInfo) =
+    tree.nodes.add PackedNode(kind: kind, info: info,
+                              operand: int32 getOrIncl(tree.sh.strings, token))
+
+  proc add*(tree: var PackedTree; kind: TNodeKind; info: PackedLineInfo) =
+    tree.nodes.add PackedNode(kind: kind, operand: 0, info: info)
+
+proc throwAwayLastNode*(tree: var PackedTree) =
+  tree.nodes.setLen(tree.nodes.len-1)
+
 proc addIdent*(tree: var PackedTree; s: LitId; info: PackedLineInfo) =
-  tree.nodes.add PackedNode(x: toX(nkIdent, uint32(s)), info: info)
+  tree.nodes.add PackedNode(kind: nkIdent, operand: int32(s), info: info)
 
 proc addSym*(tree: var PackedTree; s: int32; info: PackedLineInfo) =
-  tree.nodes.add PackedNode(x: toX(nkSym, cast[uint32](s)), info: info)
+  tree.nodes.add PackedNode(kind: nkSym, operand: s, info: info)
+
+proc addModuleId*(tree: var PackedTree; s: ModuleId; info: PackedLineInfo) =
+  tree.nodes.add PackedNode(kind: nkInt32Lit, operand: int32(s), info: info)
 
 proc addSymDef*(tree: var PackedTree; s: SymId; info: PackedLineInfo) =
-  tree.nodes.add PackedNode(x: toX(nkSym, cast[uint32](s)), info: info)
+  tree.nodes.add PackedNode(kind: nkSym, operand: int32(s), info: info)
 
 proc isAtom*(tree: PackedTree; pos: int): bool {.inline.} = tree.nodes[pos].kind <= nkNilLit
 
+proc copyTree*(dest: var PackedTree; tree: PackedTree; n: NodePos) =
+  # and this is why the IR is superior. We can copy subtrees
+  # via a linear scan.
+  let pos = n.int
+  let L = if isAtom(tree, pos): 1 else: tree.nodes[pos].operand
+  let d = dest.nodes.len
+  dest.nodes.setLen(d + L)
+  for i in 0..<L:
+    dest.nodes[d+i] = tree.nodes[pos+i]
+
+when false:
+  proc copySym*(dest: var PackedTree; tree: PackedTree; s: SymId): SymId =
+    result = SymId(dest.sh.syms.len)
+    assert int(s) < tree.sh.syms.len
+    let oldSym = tree.sh.syms[s.int]
+    dest.sh.syms.add oldSym
+
 type
   PatchPos = distinct int
 
-proc addNode*(t: var PackedTree; kind: TNodeKind; operand: int32;
-              typeId: PackedItemId = nilItemId; info: PackedLineInfo;
-              flags: TNodeFlags = {}) =
-  t.nodes.add PackedNode(x: toX(kind, cast[uint32](operand)), info: info)
-  if flags != {}:
-    t.withFlags.add (t.nodes.len.int32 - 1, flags)
-  if typeId != nilItemId:
-    t.withTypes.add (t.nodes.len.int32 - 1, typeId)
+when false:
+  proc prepare*(tree: var PackedTree; kind: TNodeKind; info: PackedLineInfo): PatchPos =
+    result = PatchPos tree.nodes.len
+    tree.nodes.add PackedNode(kind: kind, operand: 0, info: info)
 
 proc prepare*(tree: var PackedTree; kind: TNodeKind; flags: TNodeFlags; typeId: PackedItemId; info: PackedLineInfo): PatchPos =
   result = PatchPos tree.nodes.len
-  tree.addNode(kind = kind, flags = flags, operand = 0, info = info, typeId = typeId)
+  tree.nodes.add PackedNode(kind: kind, flags: flags, operand: 0, info: info,
+                            typeId: typeId)
 
 proc prepare*(dest: var PackedTree; source: PackedTree; sourcePos: NodePos): PatchPos =
   result = PatchPos dest.nodes.len
@@ -162,30 +186,26 @@ proc prepare*(dest: var PackedTree; source: PackedTree; sourcePos: NodePos): Pat
 
 proc patch*(tree: var PackedTree; pos: PatchPos) =
   let pos = pos.int
-  let k = tree.nodes[pos].kind
-  assert k > nkNilLit
+  assert tree.nodes[pos].kind > nkNilLit
   let distance = int32(tree.nodes.len - pos)
-  assert distance > 0
-  tree.nodes[pos].x = toX(k, cast[uint32](distance))
+  tree.nodes[pos].operand = distance
 
 proc len*(tree: PackedTree): int {.inline.} = tree.nodes.len
 
-proc `[]`*(tree: PackedTree; i: NodePos): lent PackedNode {.inline.} =
-  tree.nodes[i.int]
-
-template rawSpan(n: PackedNode): int = int(uoperand(n))
+proc `[]`*(tree: PackedTree; i: int): lent PackedNode {.inline.} =
+  tree.nodes[i]
 
 proc nextChild(tree: PackedTree; pos: var int) {.inline.} =
   if tree.nodes[pos].kind > nkNilLit:
-    assert tree.nodes[pos].uoperand > 0
-    inc pos, tree.nodes[pos].rawSpan
+    assert tree.nodes[pos].operand > 0
+    inc pos, tree.nodes[pos].operand
   else:
     inc pos
 
 iterator sonsReadonly*(tree: PackedTree; n: NodePos): NodePos =
   var pos = n.int
   assert tree.nodes[pos].kind > nkNilLit
-  let last = pos + tree.nodes[pos].rawSpan
+  let last = pos + tree.nodes[pos].operand
   inc pos
   while pos < last:
     yield NodePos pos
@@ -206,7 +226,7 @@ iterator isons*(dest: var PackedTree; tree: PackedTree;
 iterator sonsFrom1*(tree: PackedTree; n: NodePos): NodePos =
   var pos = n.int
   assert tree.nodes[pos].kind > nkNilLit
-  let last = pos + tree.nodes[pos].rawSpan
+  let last = pos + tree.nodes[pos].operand
   inc pos
   if pos < last:
     nextChild tree, pos
@@ -220,7 +240,7 @@ iterator sonsWithoutLast2*(tree: PackedTree; n: NodePos): NodePos =
     inc count
   var pos = n.int
   assert tree.nodes[pos].kind > nkNilLit
-  let last = pos + tree.nodes[pos].rawSpan
+  let last = pos + tree.nodes[pos].operand
   inc pos
   while pos < last and count > 2:
     yield NodePos pos
@@ -230,7 +250,7 @@ iterator sonsWithoutLast2*(tree: PackedTree; n: NodePos): NodePos =
 proc parentImpl(tree: PackedTree; n: NodePos): NodePos =
   # finding the parent of a node is rather easy:
   var pos = n.int - 1
-  while pos >= 0 and (isAtom(tree, pos) or (pos + tree.nodes[pos].rawSpan - 1 < n.int)):
+  while pos >= 0 and (isAtom(tree, pos) or (pos + tree.nodes[pos].operand - 1 < n.int)):
     dec pos
   #assert pos >= 0, "node has no parent"
   result = NodePos(pos)
@@ -256,32 +276,20 @@ proc firstSon*(tree: PackedTree; n: NodePos): NodePos {.inline.} =
 proc kind*(tree: PackedTree; n: NodePos): TNodeKind {.inline.} =
   tree.nodes[n.int].kind
 proc litId*(tree: PackedTree; n: NodePos): LitId {.inline.} =
-  LitId tree.nodes[n.int].uoperand
+  LitId tree.nodes[n.int].operand
 proc info*(tree: PackedTree; n: NodePos): PackedLineInfo {.inline.} =
   tree.nodes[n.int].info
 
-proc findType*(tree: PackedTree; n: NodePos): PackedItemId =
-  for x in tree.withTypes:
-    if x[0] == int32(n): return x[1]
-    if x[0] > int32(n): return nilItemId
-  return nilItemId
-
-proc findFlags*(tree: PackedTree; n: NodePos): TNodeFlags =
-  for x in tree.withFlags:
-    if x[0] == int32(n): return x[1]
-    if x[0] > int32(n): return {}
-  return {}
-
 template typ*(n: NodePos): PackedItemId =
-  tree.findType(n)
+  tree.nodes[n.int].typeId
 template flags*(n: NodePos): TNodeFlags =
-  tree.findFlags(n)
+  tree.nodes[n.int].flags
 
-template uoperand*(n: NodePos): uint32 =
-  tree.nodes[n.int].uoperand
+template operand*(n: NodePos): int32 =
+  tree.nodes[n.int].operand
 
 proc span*(tree: PackedTree; pos: int): int {.inline.} =
-  if isAtom(tree, pos): 1 else: tree.nodes[pos].rawSpan
+  if isAtom(tree, pos): 1 else: tree.nodes[pos].operand
 
 proc sons2*(tree: PackedTree; n: NodePos): (NodePos, NodePos) =
   assert(not isAtom(tree, n.int))
@@ -311,28 +319,64 @@ when false:
 
 template kind*(n: NodePos): TNodeKind = tree.nodes[n.int].kind
 template info*(n: NodePos): PackedLineInfo = tree.nodes[n.int].info
-template litId*(n: NodePos): LitId = LitId tree.nodes[n.int].uoperand
+template litId*(n: NodePos): LitId = LitId tree.nodes[n.int].operand
 
-template symId*(n: NodePos): SymId = SymId tree.nodes[n.int].soperand
+template symId*(n: NodePos): SymId = SymId tree.nodes[n.int].operand
 
 proc firstSon*(n: NodePos): NodePos {.inline.} = NodePos(n.int+1)
 
+when false:
+  # xxx `nkStrLit` or `nkStrLit..nkTripleStrLit:` below?
+  proc strLit*(tree: PackedTree; n: NodePos): lent string =
+    assert n.kind == nkStrLit
+    result = tree.sh.strings[LitId tree.nodes[n.int].operand]
+
+  proc strVal*(tree: PackedTree; n: NodePos): string =
+    assert n.kind == nkStrLit
+    result = tree.sh.strings[LitId tree.nodes[n.int].operand]
+    #result = cookedStrLit(raw)
+
+  proc filenameVal*(tree: PackedTree; n: NodePos): string =
+    case n.kind
+    of nkStrLit:
+      result = strVal(tree, n)
+    of nkIdent:
+      result = tree.sh.strings[n.litId]
+    of nkSym:
+      result = tree.sh.strings[tree.sh.syms[int n.symId].name]
+    else:
+      result = ""
+
+  proc identAsStr*(tree: PackedTree; n: NodePos): lent string =
+    assert n.kind == nkIdent
+    result = tree.sh.strings[LitId tree.nodes[n.int].operand]
+
 const
   externIntLit* = {nkCharLit,
     nkIntLit,
     nkInt8Lit,
     nkInt16Lit,
-    nkInt32Lit,
     nkInt64Lit,
     nkUIntLit,
     nkUInt8Lit,
     nkUInt16Lit,
     nkUInt32Lit,
-    nkUInt64Lit}
+    nkUInt64Lit} # nkInt32Lit is missing by design!
 
-  externSIntLit* = {nkIntLit, nkInt8Lit, nkInt16Lit, nkInt32Lit, nkInt64Lit}
+  externSIntLit* = {nkIntLit, nkInt8Lit, nkInt16Lit, nkInt64Lit}
   externUIntLit* = {nkUIntLit, nkUInt8Lit, nkUInt16Lit, nkUInt32Lit, nkUInt64Lit}
-  directIntLit* = nkNone
+  directIntLit* = nkInt32Lit
+
+when false:
+  proc identIdImpl(tree: PackedTree; n: NodePos): LitId =
+    if n.kind == nkIdent:
+      result = n.litId
+    elif n.kind == nkSym:
+      result = tree.sh.syms[int n.symId].name
+    else:
+      result = LitId(0)
+
+  template identId*(n: NodePos): LitId = identIdImpl(tree, n)
 
 template copyInto*(dest, n, body) =
   let patchPos = prepare(dest, tree, n)
@@ -344,8 +388,28 @@ template copyIntoKind*(dest, kind, info, body) =
   body
   patch dest, patchPos
 
+when false:
+  proc hasPragma*(tree: PackedTree; n: NodePos; pragma: string): bool =
+    let litId = tree.sh.strings.getKeyId(pragma)
+    if litId == LitId(0):
+      return false
+    assert n.kind == nkPragma
+    for ch0 in sonsReadonly(tree, n):
+      if ch0.kind == nkExprColonExpr:
+        if ch0.firstSon.identId == litId:
+          return true
+      elif ch0.identId == litId:
+        return true
+
 proc getNodeId*(tree: PackedTree): NodeId {.inline.} = NodeId tree.nodes.len
 
+when false:
+  proc produceError*(dest: var PackedTree; tree: PackedTree; n: NodePos; msg: string) =
+    let patchPos = prepare(dest, nkError, n.info)
+    dest.add nkStrLit, msg, n.info
+    copyTree(dest, tree, n)
+    patch dest, patchPos
+
 iterator allNodes*(tree: PackedTree): NodePos =
   var p = 0
   while p < tree.len:
@@ -355,13 +419,3 @@ iterator allNodes*(tree: PackedTree): NodePos =
 
 proc toPackedItemId*(item: int32): PackedItemId {.inline.} =
   PackedItemId(module: LitId(0), item: item)
-
-proc load*(f: var RodFile; t: var PackedTree) =
-  loadSeq f, t.nodes
-  loadSeq f, t.withFlags
-  loadSeq f, t.withTypes
-
-proc store*(f: var RodFile; t: PackedTree) =
-  storeSeq f, t.nodes
-  storeSeq f, t.withFlags
-  storeSeq f, t.withTypes

compiler/ic/replayer.nim

@@ -14,7 +14,7 @@
 import ".." / [ast, modulegraphs, trees, extccomp, btrees,
   msgs, lineinfos, pathutils, options, cgmeth]
 
-import std/tables
+import tables
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -103,17 +103,6 @@ proc replayBackendProcs*(g: ModuleGraph; module: int) =
     let symId = FullId(module: tmp.module, packed: it[1])
     g.enumToStringProcs[key] = LazySym(id: symId, sym: nil)
 
-  for it in mitems(g.packed[module].fromDisk.methodsPerType):
-    let key = translateId(it[0], g.packed, module, g.config)
-    let tmp = translateId(it[1], g.packed, module, g.config)
-    let symId = FullId(module: tmp.module, packed: it[1])
-    g.methodsPerType.mgetOrPut(key, @[]).add LazySym(id: symId, sym: nil)
-
-  for it in mitems(g.packed[module].fromDisk.dispatchers):
-    let tmp = translateId(it, g.packed, module, g.config)
-    let symId = FullId(module: tmp.module, packed: it)
-    g.dispatchers.add LazySym(id: symId, sym: nil)
-
 proc replayGenericCacheInformation*(g: ModuleGraph; module: int) =
   ## We remember the generic instantiations a module performed
   ## in order to to avoid the code bloat that generic code tends
@@ -138,12 +127,12 @@ proc replayGenericCacheInformation*(g: ModuleGraph; module: int) =
       module: module, sym: FullId(module: sym.module, packed: it.sym),
       concreteTypes: concreteTypes, inst: nil)
 
-  for it in mitems(g.packed[module].fromDisk.methodsPerGenericType):
+  for it in mitems(g.packed[module].fromDisk.methodsPerType):
     let key = translateId(it[0], g.packed, module, g.config)
     let col = it[1]
     let tmp = translateId(it[2], g.packed, module, g.config)
     let symId = FullId(module: tmp.module, packed: it[2])
-    g.methodsPerGenericType.mgetOrPut(key, @[]).add (col, LazySym(id: symId, sym: nil))
+    g.methodsPerType.mgetOrPut(key, @[]).add (col, LazySym(id: symId, sym: nil))
 
   replayBackendProcs(g, module)
 

compiler/ic/rodfiles.nim

@@ -14,13 +14,11 @@
 ##     compiler works and less a storage format, you're probably looking for
 ##     the `ic` or `packed_ast` modules to understand the logical format.
 
-from std/typetraits import supportsCopyMem
+from typetraits import supportsCopyMem
 
 when defined(nimPreviewSlimSystem):
   import std/[syncio, assertions]
 
-import std / tables
-
 ## Overview
 ## ========
 ## `RodFile` represents a Rod File (versioned binary format), and the
@@ -94,16 +92,11 @@ type
     typeInstCacheSection
     procInstCacheSection
     attachedOpsSection
-    methodsPerGenericTypeSection
-    enumToStringProcsSection
     methodsPerTypeSection
-    dispatchersSection
+    enumToStringProcsSection
     typeInfoSection  # required by the backend
     backendFlagsSection
     aliveSymsSection # beware, this is stored in a `.alivesyms` file.
-    sideChannelSection
-    namespaceSection
-    symnamesSection
 
   RodFileError* = enum
     ok, tooBig, cannotOpen, ioFailure, wrongHeader, wrongSection, configMismatch,
@@ -116,8 +109,8 @@ type
                        # better than exceptions.
 
 const
-  RodVersion = 2
-  defaultCookie = [byte(0), byte('R'), byte('O'), byte('D'),
+  RodVersion = 1
+  cookie = [byte(0), byte('R'), byte('O'), byte('D'),
             byte(sizeof(int)*8), byte(system.cpuEndian), byte(0), byte(RodVersion)]
 
 proc setError(f: var RodFile; err: RodFileError) {.inline.} =
@@ -172,18 +165,6 @@ proc storeSeq*[T](f: var RodFile; s: seq[T]) =
     for i in 0..<s.len:
       storePrim(f, s[i])
 
-proc storeOrderedTable*[K, T](f: var RodFile; s: OrderedTable[K, T]) =
-  if f.err != ok: return
-  if s.len >= high(int32):
-    setError f, tooBig
-    return
-  var lenPrefix = int32(s.len)
-  if writeBuffer(f.f, addr lenPrefix, sizeof(lenPrefix)) != sizeof(lenPrefix):
-    setError f, ioFailure
-  else:
-    for _, v in s:
-      storePrim(f, v)
-
 proc loadPrim*(f: var RodFile; s: var string) =
   ## Read a string, the length was stored as a prefix
   if f.err != ok: return
@@ -225,26 +206,13 @@ proc loadSeq*[T](f: var RodFile; s: var seq[T]) =
     for i in 0..<lenPrefix:
       loadPrim(f, s[i])
 
-proc loadOrderedTable*[K, T](f: var RodFile; s: var OrderedTable[K, T]) =
-  ## `T` must be compatible with `copyMem`, see `loadPrim`
-  if f.err != ok: return
-  var lenPrefix = int32(0)
-  if readBuffer(f.f, addr lenPrefix, sizeof(lenPrefix)) != sizeof(lenPrefix):
-    setError f, ioFailure
-  else:
-    s = initOrderedTable[K, T](lenPrefix)
-    for i in 0..<lenPrefix:
-      var x = default T
-      loadPrim(f, x)
-      s[x.id] = x
-
-proc storeHeader*(f: var RodFile; cookie = defaultCookie) =
+proc storeHeader*(f: var RodFile) =
   ## stores the header which is described by `cookie`.
   if f.err != ok: return
   if f.f.writeBytes(cookie, 0, cookie.len) != cookie.len:
     setError f, ioFailure
 
-proc loadHeader*(f: var RodFile; cookie = defaultCookie) =
+proc loadHeader*(f: var RodFile) =
   ## Loads the header which is described by `cookie`.
   if f.err != ok: return
   var thisCookie: array[cookie.len, byte] = default(array[cookie.len, byte])

compiler/idents.nim

@@ -11,8 +11,8 @@
 # An identifier is a shared immutable string that can be compared by its
 # id. This module is essential for the compiler's performance.
 
-import wordrecg
-import std/hashes
+import
+  hashes, wordrecg
 
 when defined(nimPreviewSlimSystem):
   import std/assertions

compiler/importer.nim

@@ -10,12 +10,10 @@
 ## This module implements the symbol importing mechanism.
 
 import
-  ast, astalgo, msgs, options, idents, lookups,
-  semdata, modulepaths, sigmatch, lineinfos,
-  modulegraphs, wordrecg
-from std/strutils import `%`, startsWith
-from std/sequtils import addUnique
-import std/[sets, tables, intsets]
+  intsets, ast, astalgo, msgs, options, idents, lookups,
+  semdata, modulepaths, sigmatch, lineinfos, sets,
+  modulegraphs, wordrecg, tables
+from strutils import `%`
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -144,7 +142,7 @@ proc importSymbol(c: PContext, n: PNode, fromMod: PSym; importSet: var IntSet) =
     # for an enumeration we have to add all identifiers
     if multiImport:
       # for a overloadable syms add all overloaded routines
-      var it: ModuleIter = default(ModuleIter)
+      var it: ModuleIter
       var e = initModuleIter(it, c.graph, fromMod, s.name)
       while e != nil:
         if e.name.id != s.name.id: internalError(c.config, n.info, "importSymbol: 3")
@@ -231,6 +229,11 @@ proc importForwarded(c: PContext, n: PNode, exceptSet: IntSet; fromMod: PSym; im
     for i in 0..n.safeLen-1:
       importForwarded(c, n[i], exceptSet, fromMod, importSet)
 
+proc addUnique[T](x: var seq[T], y: sink T) {.noSideEffect.} =
+  for i in 0..high(x):
+    if x[i] == y: return
+  x.add y
+    
 proc importModuleAs(c: PContext; n: PNode, realModule: PSym, importHidden: bool): PSym =
   result = realModule
   template createModuleAliasImpl(ident): untyped =
@@ -246,14 +249,12 @@ proc importModuleAs(c: PContext; n: PNode, realModule: PSym, importHidden: bool)
     result = createModuleAliasImpl(realModule.name)
   if importHidden:
     result.options.incl optImportHidden
-  let moduleIdent = if n.kind == nkInfix: n[^1] else: n
-  c.unusedImports.add((result, moduleIdent.info))
+  c.unusedImports.add((result, n.info))
   c.importModuleMap[result.id] = realModule.id
   c.importModuleLookup.mgetOrPut(result.name.id, @[]).addUnique realModule.id
 
 proc transformImportAs(c: PContext; n: PNode): tuple[node: PNode, importHidden: bool] =
-  result = (nil, false)
-  var ret = default(typeof(result))
+  var ret: typeof(result)
   proc processPragma(n2: PNode): PNode =
     let (result2, kws) = splitPragmas(c, n2)
     result = result2
@@ -304,26 +305,13 @@ proc myImportModule(c: PContext, n: var PNode, importStmtResult: PNode): PSym =
       var prefix = ""
       if realModule.constraint != nil: prefix = realModule.constraint.strVal & "; "
       message(c.config, n.info, warnDeprecated, prefix & realModule.name.s & " is deprecated")
-    let moduleName = getModuleName(c.config, n)
-    if belongsToStdlib(c.graph, result) and not startsWith(moduleName, stdPrefix) and
-        not startsWith(moduleName, "system/") and not startsWith(moduleName, "packages/"):
-      message(c.config, n.info, warnStdPrefix, realModule.name.s)
-
-    proc suggestMod(n: PNode; s: PSym) =
-      if n.kind == nkImportAs:
-        suggestMod(n[0], realModule)
-      elif n.kind == nkInfix:
-        suggestMod(n[2], s)
-      else:
-        suggestSym(c.graph, n.info, s, c.graph.usageSym, false)
-    suggestMod(n, result)
+    suggestSym(c.graph, n.info, result, c.graph.usageSym, false)
     importStmtResult.add newSymNode(result, n.info)
     #newStrNode(toFullPath(c.config, f), n.info)
   else:
     result = nil
 
 proc afterImport(c: PContext, m: PSym) =
-  if isCachedModule(c.graph, m): return
   # fixes bug #17510, for re-exported symbols
   let realModuleId = c.importModuleMap[m.id]
   for s in allSyms(c.graph, m):

compiler/injectdestructors.nim

@@ -14,13 +14,11 @@
 ## See doc/destructors.rst for a spec of the implemented rewrite rules
 
 import
-  ast, astalgo, msgs, renderer, magicsys, types, idents,
-  options, lowerings, modulegraphs,
+  intsets, strtabs, ast, astalgo, msgs, renderer, magicsys, types, idents,
+  strutils, options, lowerings, tables, modulegraphs,
   lineinfos, parampatterns, sighashes, liftdestructors, optimizer,
   varpartitions, aliasanalysis, dfa, wordrecg
 
-import std/[strtabs, tables, strutils, intsets]
-
 when defined(nimPreviewSlimSystem):
   import std/assertions
 
@@ -163,8 +161,7 @@ proc isLastReadImpl(n: PNode; c: var Con; scope: var Scope): bool =
     result = false
 
 proc isLastRead(n: PNode; c: var Con; s: var Scope): bool =
-  # bug #23354; an object type could have a non-trival assignements when it is passed to a sink parameter
-  if not hasDestructor(c, n.typ) and (n.typ.kind != tyObject or isTrival(getAttachedOp(c.graph, n.typ, attachedAsgn))): return true
+  if not hasDestructor(c, n.typ): return true
 
   let m = skipConvDfa(n)
   result = (m.kind == nkSym and sfSingleUsedTemp in m.sym.flags) or
@@ -212,17 +209,15 @@ proc checkForErrorPragma(c: Con; t: PType; ri: PNode; opname: string; inferredFr
       m.add " a 'sink' parameter"
   m.add "; routine: "
   m.add c.owner.name.s
-  #m.add "\n\n"
-  #m.add renderTree(c.body, {renderIds})
   localError(c.graph.config, ri.info, errGenerated, m)
 
 proc makePtrType(c: var Con, baseType: PType): PType =
-  result = newType(tyPtr, c.idgen, c.owner)
+  result = newType(tyPtr, nextTypeId c.idgen, c.owner)
   addSonSkipIntLit(result, baseType, c.idgen)
 
 proc genOp(c: var Con; op: PSym; dest: PNode): PNode =
   var addrExp: PNode
-  if op.typ != nil and op.typ.signatureLen > 1 and op.typ.firstParamType.kind != tyVar:
+  if op.typ != nil and op.typ.len > 1 and op.typ[1].kind != tyVar:
     addrExp = dest
   else:
     addrExp = newNodeIT(nkHiddenAddr, dest.info, makePtrType(c, dest.typ))
@@ -300,7 +295,7 @@ proc genSink(c: var Con; s: var Scope; dest, ri: PNode; flags: set[MoveOrCopyFla
 proc isCriticalLink(dest: PNode): bool {.inline.} =
   #[
   Lins's idea that only "critical" links can introduce a cycle. This is
-  critical for the performance guarantees that we strive for: If you
+  critical for the performance gurantees that we strive for: If you
   traverse a data structure, no tracing will be performed at all.
   ORC is about this promise: The GC only touches the memory that the
   mutator touches too.
@@ -319,7 +314,7 @@ proc isCriticalLink(dest: PNode): bool {.inline.} =
 
 proc finishCopy(c: var Con; result, dest: PNode; isFromSink: bool) =
   if c.graph.config.selectedGC == gcOrc:
-    let t = dest.typ.skipTypes(tyUserTypeClasses + {tyGenericInst, tyAlias, tySink, tyDistinct})
+    let t = dest.typ.skipTypes({tyGenericInst, tyAlias, tySink, tyDistinct})
     if cyclicType(c.graph, t):
       result.add boolLit(c.graph, result.info, isFromSink or isCriticalLink(dest))
 
@@ -412,10 +407,7 @@ proc genDefaultCall(t: PType; c: Con; info: TLineInfo): PNode =
 proc destructiveMoveVar(n: PNode; c: var Con; s: var Scope): PNode =
   # generate: (let tmp = v; reset(v); tmp)
   if (not hasDestructor(c, n.typ)) and c.inEnsureMove == 0:
-    assert n.kind != nkSym or not hasDestructor(c, n.sym.typ) or
-          (n.typ.kind == tyPtr and n.sym.typ.kind == tyRef)
-      # bug #23505; transformed by `transf`: addr (deref ref) -> ptr
-      # we know it's really a pointer; so here we assign it directly
+    assert n.kind != nkSym or not hasDestructor(c, n.sym.typ)
     result = copyTree(n)
   else:
     result = newNodeIT(nkStmtListExpr, n.info, n.typ)
@@ -446,19 +438,18 @@ proc isCapturedVar(n: PNode): bool =
 
 proc passCopyToSink(n: PNode; c: var Con; s: var Scope): PNode =
   result = newNodeIT(nkStmtListExpr, n.info, n.typ)
-  let nTyp = n.typ.skipTypes(tyUserTypeClasses)
-  let tmp = c.getTemp(s, nTyp, n.info)
-  if hasDestructor(c, nTyp):
-    let typ = nTyp.skipTypes({tyGenericInst, tyAlias, tySink})
+  let tmp = c.getTemp(s, n.typ, n.info)
+  if hasDestructor(c, n.typ):
+    let typ = n.typ.skipTypes({tyGenericInst, tyAlias, tySink})
     let op = getAttachedOp(c.graph, typ, attachedDup)
     if op != nil and tfHasOwned notin typ.flags:
       if sfError in op.flags:
-        c.checkForErrorPragma(nTyp, n, "=dup")
+        c.checkForErrorPragma(n.typ, n, "=dup")
       else:
         let copyOp = getAttachedOp(c.graph, typ, attachedAsgn)
         if copyOp != nil and sfError in copyOp.flags and
            sfOverridden notin op.flags:
-          c.checkForErrorPragma(nTyp, n, "=dup", inferredFromCopy = true)
+          c.checkForErrorPragma(n.typ, n, "=dup", inferredFromCopy = true)
 
       let src = p(n, c, s, normal)
       var newCall = newTreeIT(nkCall, src.info, src.typ,
@@ -475,7 +466,7 @@ proc passCopyToSink(n: PNode; c: var Con; s: var Scope): PNode =
       m.add p(n, c, s, normal)
       c.finishCopy(m, n, isFromSink = true)
       result.add m
-    if isLValue(n) and not isCapturedVar(n) and nTyp.skipTypes(abstractInst).kind != tyRef and c.inSpawn == 0:
+    if isLValue(n) and not isCapturedVar(n) and n.typ.skipTypes(abstractInst).kind != tyRef and c.inSpawn == 0:
       message(c.graph.config, n.info, hintPerformance,
         ("passing '$1' to a sink parameter introduces an implicit copy; " &
         "if possible, rearrange your program's control flow to prevent it") % $n)
@@ -484,8 +475,8 @@ proc passCopyToSink(n: PNode; c: var Con; s: var Scope): PNode =
         ("cannot move '$1', passing '$1' to a sink parameter introduces an implicit copy") % $n)
   else:
     if c.graph.config.selectedGC in {gcArc, gcOrc, gcAtomicArc}:
-      assert(not containsManagedMemory(nTyp))
-    if nTyp.skipTypes(abstractInst).kind in {tyOpenArray, tyVarargs}:
+      assert(not containsManagedMemory(n.typ))
+    if n.typ.skipTypes(abstractInst).kind in {tyOpenArray, tyVarargs}:
       localError(c.graph.config, n.info, "cannot create an implicit openArray copy to be passed to a sink parameter")
     result.add newTree(nkAsgn, tmp, p(n, c, s, normal))
   # Since we know somebody will take over the produced copy, there is
@@ -494,14 +485,14 @@ proc passCopyToSink(n: PNode; c: var Con; s: var Scope): PNode =
 
 proc isDangerousSeq(t: PType): bool {.inline.} =
   let t = t.skipTypes(abstractInst)
-  result = t.kind == tySequence and tfHasOwned notin t.elementType.flags
+  result = t.kind == tySequence and tfHasOwned notin t[0].flags
 
 proc containsConstSeq(n: PNode): bool =
   if n.kind == nkBracket and n.len > 0 and n.typ != nil and isDangerousSeq(n.typ):
     return true
   result = false
   case n.kind
-  of nkExprEqExpr, nkExprColonExpr, nkHiddenStdConv, nkHiddenSubConv, nkCast:
+  of nkExprEqExpr, nkExprColonExpr, nkHiddenStdConv, nkHiddenSubConv:
     result = containsConstSeq(n[1])
   of nkObjConstr, nkClosure:
     for i in 1..<n.len:
@@ -599,9 +590,7 @@ template processScopeExpr(c: var Con; s: var Scope; ret: PNode, processCall: unt
   # tricky because you would have to intercept moveOrCopy at a certain point
   let tmp = c.getTemp(s.parent[], ret.typ, ret.info)
   tmp.sym.flags = tmpFlags
-  let cpy = if hasDestructor(c, ret.typ) and
-                ret.typ.kind notin {tyOpenArray, tyVarargs}:
-                # bug #23247 we don't own the data, so it's harmful to destroy it
+  let cpy = if hasDestructor(c, ret.typ):
               s.parent[].final.add c.genDestroy(tmp)
               moveOrCopy(tmp, ret, c, s, {IsDecl})
             else:
@@ -653,7 +642,7 @@ template handleNestedTempl(n, processCall: untyped, willProduceStmt = false,
       for j in 0 ..< it.len-1:
         branch[j] = copyTree(it[j])
       var ofScope = nestedScope(s, it.lastSon)
-      branch[^1] = if n.typ.isEmptyType or it[^1].typ.isEmptyType or willProduceStmt:
+      branch[^1] = if it[^1].typ.isEmptyType or willProduceStmt:
                      processScope(c, ofScope, maybeVoid(it[^1], ofScope))
                    else:
                      processScopeExpr(c, ofScope, it[^1], processCall, tmpFlags)
@@ -701,7 +690,7 @@ template handleNestedTempl(n, processCall: untyped, willProduceStmt = false,
         #Condition needs to be destroyed outside of the condition/branch scope
         branch[0] = p(it[0], c, s, normal)
 
-      branch[^1] = if n.typ.isEmptyType or it[^1].typ.isEmptyType or willProduceStmt:
+      branch[^1] = if it[^1].typ.isEmptyType or willProduceStmt:
                      processScope(c, branchScope, maybeVoid(it[^1], branchScope))
                    else:
                      processScopeExpr(c, branchScope, it[^1], processCall, tmpFlags)
@@ -776,18 +765,6 @@ proc pRaiseStmt(n: PNode, c: var Con; s: var Scope): PNode =
       result.add copyNode(n[0])
   s.needsTry = true
 
-template isCustomDestructor(c: Con, t: PType): bool =
-  hasDestructor(c, t) and
-          getAttachedOp(c.graph, t, attachedDestructor) != nil and
-          sfOverridden in getAttachedOp(c.graph, t, attachedDestructor).flags
-
-proc hasCustomDestructor(c: Con, t: PType): bool =
-  result = isCustomDestructor(c, t)
-  var obj = t
-  while obj.baseClass != nil:
-    obj = skipTypes(obj.baseClass, abstractPtrs)
-    result = result or isCustomDestructor(c, obj)
-
 proc p(n: PNode; c: var Con; s: var Scope; mode: ProcessMode; tmpFlags = {sfSingleUsedTemp}; inReturn = false): PNode =
   if n.kind in {nkStmtList, nkStmtListExpr, nkBlockStmt, nkBlockExpr, nkIfStmt,
                 nkIfExpr, nkCaseStmt, nkWhen, nkWhileStmt, nkParForStmt, nkTryStmt, nkPragmaBlock}:
@@ -829,9 +806,6 @@ proc p(n: PNode; c: var Con; s: var Scope; mode: ProcessMode; tmpFlags = {sfSing
     elif n.kind in {nkObjDownConv, nkObjUpConv}:
       result = copyTree(n)
       result[0] = p(n[0], c, s, sinkArg)
-    elif n.kind == nkCast and n.typ.skipTypes(abstractInst).kind in {tyString, tySequence}:
-      result = copyTree(n)
-      result[1] = p(n[1], c, s, sinkArg)
     elif n.typ == nil:
       # 'raise X' can be part of a 'case' expression. Deal with it here:
       result = p(n, c, s, normal)
@@ -875,14 +849,13 @@ proc p(n: PNode; c: var Con; s: var Scope; mode: ProcessMode; tmpFlags = {sfSing
       for i in 1..<n.len:
         if n[i].kind == nkExprColonExpr:
           let field = lookupFieldAgain(t, n[i][0].sym)
-          if field != nil and (sfCursor in field.flags or field.typ.kind in {tyOpenArray, tyVarargs}):
-            # don't sink fields with openarray types
+          if field != nil and sfCursor in field.flags:
             result[i][1] = p(n[i][1], c, s, normal)
           else:
             result[i][1] = p(n[i][1], c, s, m)
         else:
           result[i] = p(n[i], c, s, m)
-      if mode == normal and (isRefConstr or hasCustomDestructor(c, t)):
+      if mode == normal and isRefConstr:
         result = ensureDestruction(result, n, c, s)
     of nkCallKinds:
       if n[0].kind == nkSym and n[0].sym.magic == mEnsureMove:
@@ -897,9 +870,8 @@ proc p(n: PNode; c: var Con; s: var Scope; mode: ProcessMode; tmpFlags = {sfSing
       elif c.inSpawn > 0:
         c.inSpawn.dec
 
-      # bug #23907; skips tyGenericInst for generic callbacks
-      let parameters = if n[0].typ != nil: n[0].typ.skipTypes(abstractInst) else: n[0].typ
-      let L = if parameters != nil: parameters.signatureLen else: 0
+      let parameters = n[0].typ
+      let L = if parameters != nil: parameters.len else: 0
 
       when false:
         var isDangerous = false
@@ -929,10 +901,7 @@ proc p(n: PNode; c: var Con; s: var Scope; mode: ProcessMode; tmpFlags = {sfSing
         result[0] = p(n[0], c, s, normal)
       if canRaise(n[0]): s.needsTry = true
       if mode == normal:
-        if result.typ != nil and result.typ.kind notin {tyOpenArray, tyVarargs}:
-          # Returns of openarray types shouldn't be destroyed
-          # bug #19435; # bug #23247
-          result = ensureDestruction(result, n, c, s)
+        result = ensureDestruction(result, n, c, s)
     of nkDiscardStmt: # Small optimization
       result = shallowCopy(n)
       if n[0].kind != nkEmpty:
@@ -1191,9 +1160,9 @@ proc moveOrCopy(dest, ri: PNode; c: var Con; s: var Scope, flags: set[MoveOrCopy
         # Rule 3: `=sink`(x, z); wasMoved(z)
         let snk = c.genSink(s, dest, ri, flags)
         result = newTree(nkStmtList, snk, c.genWasMoved(ri))
-      elif ri.sym.kind != skParam and
-          isAnalysableFieldAccess(ri, c.owner) and
-          isLastRead(ri, c, s) and canBeMoved(c, dest.typ):
+      elif ri.sym.kind != skParam and ri.sym.owner == c.owner and
+          isLastRead(ri, c, s) and canBeMoved(c, dest.typ) and not isCursor(ri) and
+          not ({sfGlobal, sfPure} <= ri.sym.flags):
         # Rule 3: `=sink`(x, z); wasMoved(z)
         let snk = c.genSink(s, dest, ri, flags)
         result = newTree(nkStmtList, snk, c.genWasMoved(ri))

compiler/installer.ini

@@ -6,11 +6,11 @@ Name: "Nim"
 Version: "$version"
 Platforms: """
   windows: i386;amd64
-  linux: i386;hppa;ia64;alpha;amd64;powerpc64;arm;sparc;sparc64;m68k;mips;mipsel;mips64;mips64el;powerpc;powerpc64el;arm64;riscv32;riscv64;loongarch64
+  linux: i386;hppa;ia64;alpha;amd64;powerpc64;arm;sparc;sparc64;m68k;mips;mipsel;mips64;mips64el;powerpc;powerpc64el;arm64;riscv32;riscv64
   macosx: i386;amd64;powerpc64;arm64
   solaris: i386;amd64;sparc;sparc64
   freebsd: i386;amd64;powerpc64;arm;arm64;riscv64;sparc64;mips;mipsel;mips64;mips64el;powerpc;powerpc64el
-  netbsd: i386;amd64;arm64
+  netbsd: i386;amd64
   openbsd: i386;amd64;arm;arm64
   dragonfly: i386;amd64
   crossos: amd64
@@ -71,7 +71,6 @@ Files: "testament"
 Files: "nimsuggest"
 Files: "nimsuggest/tests/*.nim"
 Files: "changelogs/*.md"
-Files: "ci/funs.sh"
 
 [Lib]
 Files: "lib"
@@ -147,4 +146,4 @@ licenses: "bin/nim,MIT;lib/*,MIT;"
 
 [nimble]
 pkgName: "nim"
-pkgFiles: "compiler/*;doc/basicopt.txt;doc/advopt.txt;doc/nimdoc.css;doc/nimdoc.cls"
+pkgFiles: "compiler/*;doc/basicopt.txt;doc/advopt.txt;doc/nimdoc.css"

compiler/int128.nim

@@ -3,7 +3,7 @@
 ## hold all from `low(BiggestInt)` to `high(BiggestUInt)`, This
 ## type is for that purpose.
 
-from std/math import trunc
+from math import trunc
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -34,7 +34,6 @@ proc `$`*(a: Int128): string
 
 proc toInt128*[T: SomeInteger | bool](arg: T): Int128 =
   {.noSideEffect.}:
-    result = Zero
     when T is bool: result.sdata(0) = int32(arg)
     elif T is SomeUnsignedInt:
       when sizeof(arg) <= 4:
@@ -209,35 +208,30 @@ proc `==`*(a, b: Int128): bool =
   return true
 
 proc bitnot*(a: Int128): Int128 =
-  result = Zero
   result.udata[0] = not a.udata[0]
   result.udata[1] = not a.udata[1]
   result.udata[2] = not a.udata[2]
   result.udata[3] = not a.udata[3]
 
 proc bitand*(a, b: Int128): Int128 =
-  result = Zero
   result.udata[0] = a.udata[0] and b.udata[0]
   result.udata[1] = a.udata[1] and b.udata[1]
   result.udata[2] = a.udata[2] and b.udata[2]
   result.udata[3] = a.udata[3] and b.udata[3]
 
 proc bitor*(a, b: Int128): Int128 =
-  result = Zero
   result.udata[0] = a.udata[0] or b.udata[0]
   result.udata[1] = a.udata[1] or b.udata[1]
   result.udata[2] = a.udata[2] or b.udata[2]
   result.udata[3] = a.udata[3] or b.udata[3]
 
 proc bitxor*(a, b: Int128): Int128 =
-  result = Zero
   result.udata[0] = a.udata[0] xor b.udata[0]
   result.udata[1] = a.udata[1] xor b.udata[1]
   result.udata[2] = a.udata[2] xor b.udata[2]
   result.udata[3] = a.udata[3] xor b.udata[3]
 
 proc `shr`*(a: Int128, b: int): Int128 =
-  result = Zero
   let b = b and 127
   if b < 32:
     result.sdata(3) = a.sdata(3) shr b
@@ -264,7 +258,6 @@ proc `shr`*(a: Int128, b: int): Int128 =
     result.sdata(0) = a.sdata(3) shr (b and 31)
 
 proc `shl`*(a: Int128, b: int): Int128 =
-  result = Zero
   let b = b and 127
   if b < 32:
     result.udata[0] = a.udata[0] shl b
@@ -288,7 +281,6 @@ proc `shl`*(a: Int128, b: int): Int128 =
     result.udata[3] = a.udata[0] shl (b and 31)
 
 proc `+`*(a, b: Int128): Int128 =
-  result = Zero
   let tmp0 = uint64(a.udata[0]) + uint64(b.udata[0])
   result.udata[0] = cast[uint32](tmp0)
   let tmp1 = uint64(a.udata[1]) + uint64(b.udata[1]) + (tmp0 shr 32)
@@ -321,7 +313,6 @@ proc abs(a: int32): int =
   if a < 0: -a else: a
 
 proc `*`(a: Int128, b: uint32): Int128 =
-  result = Zero
   let tmp0 = uint64(a.udata[0]) * uint64(b)
   let tmp1 = uint64(a.udata[1]) * uint64(b)
   let tmp2 = uint64(a.udata[2]) * uint64(b)
@@ -344,7 +335,6 @@ proc `*=`(a: var Int128, b: int32) =
   a = a * b
 
 proc makeInt128(high, low: uint64): Int128 =
-  result = Zero
   result.udata[0] = cast[uint32](low)
   result.udata[1] = cast[uint32](low shr 32)
   result.udata[2] = cast[uint32](high)
@@ -368,7 +358,7 @@ proc `*`*(lhs, rhs: Int128): Int128 =
 proc `*=`*(a: var Int128, b: Int128) =
   a = a * b
 
-import std/bitops
+import bitops
 
 proc fastLog2*(a: Int128): int =
   result = 0
@@ -383,8 +373,6 @@ proc fastLog2*(a: Int128): int =
 
 proc divMod*(dividend, divisor: Int128): tuple[quotient, remainder: Int128] =
   assert(divisor != Zero)
-  result = (Zero, Zero)
-
   let isNegativeA = isNegative(dividend)
   let isNegativeB = isNegative(divisor)
 
@@ -551,28 +539,24 @@ proc toInt128*(arg: float64): Int128 =
     return res
 
 proc maskUInt64*(arg: Int128): Int128 {.noinit, inline.} =
-  result = Zero
   result.udata[0] = arg.udata[0]
   result.udata[1] = arg.udata[1]
   result.udata[2] = 0
   result.udata[3] = 0
 
 proc maskUInt32*(arg: Int128): Int128 {.noinit, inline.} =
-  result = Zero
   result.udata[0] = arg.udata[0]
   result.udata[1] = 0
   result.udata[2] = 0
   result.udata[3] = 0
 
 proc maskUInt16*(arg: Int128): Int128 {.noinit, inline.} =
-  result = Zero
   result.udata[0] = arg.udata[0] and 0xffff
   result.udata[1] = 0
   result.udata[2] = 0
   result.udata[3] = 0
 
 proc maskUInt8*(arg: Int128): Int128 {.noinit, inline.} =
-  result = Zero
   result.udata[0] = arg.udata[0] and 0xff
   result.udata[1] = 0
   result.udata[2] = 0
@@ -589,4 +573,4 @@ proc maskBytes*(arg: Int128, numbytes: int): Int128 {.noinit.} =
   of 8:
     return maskUInt64(arg)
   else:
-    raiseAssert "masking only implemented for 1, 2, 4 and 8 bytes"
+    assert(false, "masking only implemented for 1, 2, 4 and 8 bytes")

compiler/isolation_check.nim

@@ -11,9 +11,7 @@
 ## https://github.com/nim-lang/RFCs/issues/244 for more details.
 
 import
-  ast, types, renderer
-
-import std/intsets
+  ast, types, renderer, intsets
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -54,18 +52,18 @@ proc canAlias(arg, ret: PType; marker: var IntSet): bool =
   of tyObject:
     if isFinal(ret):
       result = canAliasN(arg, ret.n, marker)
-      if not result and ret.baseClass != nil:
-        result = canAlias(arg, ret.baseClass, marker)
+      if not result and ret.len > 0 and ret[0] != nil:
+        result = canAlias(arg, ret[0], marker)
     else:
       result = true
   of tyTuple:
     result = false
-    for r in ret.kids:
-      result = canAlias(arg, r, marker)
+    for i in 0..<ret.len:
+      result = canAlias(arg, ret[i], marker)
       if result: break
   of tyArray, tySequence, tyDistinct, tyGenericInst,
      tyAlias, tyInferred, tySink, tyLent, tyOwned, tyRef:
-    result = canAlias(arg, ret.skipModifier, marker)
+    result = canAlias(arg, ret.lastSon, marker)
   of tyProc:
     result = ret.callConv == ccClosure
   else:
@@ -119,16 +117,14 @@ proc containsDangerousRefAux(t: PType; marker: var IntSet): SearchResult =
   if result != NotFound: return result
   case t.kind
   of tyObject:
-    if t.baseClass != nil:
-      result = containsDangerousRefAux(t.baseClass.skipTypes(skipPtrs), marker)
+    if t[0] != nil:
+      result = containsDangerousRefAux(t[0].skipTypes(skipPtrs), marker)
     if result == NotFound: result = containsDangerousRefAux(t.n, marker)
   of tyGenericInst, tyDistinct, tyAlias, tySink:
-    result = containsDangerousRefAux(skipModifier(t), marker)
-  of tyArray, tySet, tySequence:
-    result = containsDangerousRefAux(t.elementType, marker)
-  of tyTuple:
-    for a in t.kids:
-      result = containsDangerousRefAux(a, marker)
+    result = containsDangerousRefAux(lastSon(t), marker)
+  of tyArray, tySet, tyTuple, tySequence:
+    for i in 0..<t.len:
+      result = containsDangerousRefAux(t[i], marker)
       if result == Found: return result
   else:
     discard

compiler/jsgen.nim

@@ -31,15 +31,14 @@ implements the required case distinction.
 import
   ast, trees, magicsys, options,
   nversion, msgs, idents, types,
-  ropes, wordrecg, renderer,
+  ropes, ccgutils, wordrecg, renderer,
   cgmeth, lowerings, sighashes, modulegraphs, lineinfos,
-  transf, injectdestructors, sourcemap, astmsgs, pushpoppragmas,
-  mangleutils
+  transf, injectdestructors, sourcemap, astmsgs, backendpragmas
 
 import pipelineutils
 
-import std/[json, sets, math, tables, intsets]
-import std/strutils except addf
+import json, sets, math, tables, intsets
+import strutils except addf
 
 when defined(nimPreviewSlimSystem):
   import std/[assertions, syncio]
@@ -103,33 +102,29 @@ type
     prc: PSym
     globals, locals, body: Rope
     options: TOptions
-    optionsStack: seq[(TOptions, TNoteKinds)]
+    optionsStack: seq[TOptions]
     module: BModule
     g: PGlobals
+    generatedParamCopies: IntSet
     beforeRetNeeded: bool
     unique: int    # for temp identifier generation
     blocks: seq[TBlock]
     extraIndent: int
-    previousFileName: string  # For frameInfo inside templates.
-    # legacy: generatedParamCopies and up fields are used for jsNoLambdaLifting
-    generatedParamCopies: IntSet
     up: PProc     # up the call chain; required for closure support
+    declaredGlobals: IntSet
+    previousFileName: string  # For frameInfo inside templates.
 
 template config*(p: PProc): ConfigRef = p.module.config
 
 proc indentLine(p: PProc, r: Rope): Rope =
   var p = p
-  if jsNoLambdaLifting in p.config.legacyFeatures:
-    var ind = 0
-    while true:
-      inc ind, p.blocks.len + p.extraIndent
-      if p.up == nil or p.up.prc != p.prc.owner:
-        break
-      p = p.up
-    result = repeat(' ', ind*2) & r
-  else:
-    let ind = p.blocks.len + p.extraIndent
-    result = repeat(' ', ind*2) & r
+  var ind = 0
+  while true:
+    inc ind, p.blocks.len + p.extraIndent
+    if p.up == nil or p.up.prc != p.prc.owner:
+      break
+    p = p.up
+  result = repeat(' ', ind*2) & r
 
 template line(p: PProc, added: string) =
   p.body.add(indentLine(p, rope(added)))
@@ -180,6 +175,10 @@ proc initProcOptions(module: BModule): TOptions =
 proc newInitProc(globals: PGlobals, module: BModule): PProc =
   result = newProc(globals, module, nil, initProcOptions(module))
 
+proc declareGlobal(p: PProc; id: int; r: Rope) =
+  if p.prc != nil and not p.declaredGlobals.containsOrIncl(id):
+    p.locals.addf("global $1;$n", [r])
+
 const
   MappedToObject = {tyObject, tyArray, tyTuple, tyOpenArray,
     tySet, tyVarargs}
@@ -188,16 +187,16 @@ proc mapType(typ: PType): TJSTypeKind =
   let t = skipTypes(typ, abstractInst)
   case t.kind
   of tyVar, tyRef, tyPtr:
-    if skipTypes(t.elementType, abstractInst).kind in MappedToObject:
+    if skipTypes(t.lastSon, abstractInst).kind in MappedToObject:
       result = etyObject
     else:
       result = etyBaseIndex
   of tyPointer:
     # treat a tyPointer like a typed pointer to an array of bytes
     result = etyBaseIndex
-  of tyRange, tyDistinct, tyOrdinal, tyError, tyLent:
+  of tyRange, tyDistinct, tyOrdinal, tyProxy, tyLent:
     # tyLent is no-op as JS has pass-by-reference semantics
-    result = mapType(skipModifier t)
+    result = mapType(t[0])
   of tyInt..tyInt64, tyUInt..tyUInt64, tyEnum, tyChar: result = etyInt
   of tyBool: result = etyBool
   of tyFloat..tyFloat128: result = etyFloat
@@ -213,9 +212,9 @@ proc mapType(typ: PType): TJSTypeKind =
     result = etyNone
   of tyGenericInst, tyInferred, tyAlias, tyUserTypeClass, tyUserTypeClassInst,
      tySink, tyOwned:
-    result = mapType(typ.skipModifier)
+    result = mapType(typ.lastSon)
   of tyStatic:
-    if t.n != nil: result = mapType(skipModifier t)
+    if t.n != nil: result = mapType(lastSon t)
     else: result = etyNone
   of tyProc: result = etyProc
   of tyCstring: result = etyString
@@ -246,7 +245,7 @@ proc mangleName(m: BModule, s: PSym): Rope =
     for chr in name:
       if chr notin {'A'..'Z','a'..'z','_','$','0'..'9'}:
         return false
-  result = s.loc.snippet
+  result = s.loc.r
   if result == "":
     if s.kind == skField and s.name.s.validJsName:
       result = rope(s.name.s)
@@ -270,14 +269,10 @@ proc mangleName(m: BModule, s: PSym): Rope =
         # When hot reloading is enabled, we must ensure that the names
         # of functions and types will be preserved across rebuilds:
         result.add(idOrSig(s, m.module.name.s, m.sigConflicts, m.config))
-      elif s.kind == skParam:
-        result.add mangleParamExt(s)
-      elif s.kind in routineKinds:
-        result.add mangleProcNameExt(m.graph, s)
       else:
         result.add("_")
         result.add(rope(s.id))
-    s.loc.snippet = result
+    s.loc.r = result
 
 proc escapeJSString(s: string): string =
   result = newStringOfCap(s.len + s.len shr 2)
@@ -469,6 +464,9 @@ const # magic checked op; magic unchecked op;
     mUnaryMinusF64: ["", ""],
     mCharToStr: ["nimCharToStr", "nimCharToStr"],
     mBoolToStr: ["nimBoolToStr", "nimBoolToStr"],
+    mIntToStr: ["cstrToNimstr", "cstrToNimstr"],
+    mInt64ToStr: ["cstrToNimstr", "cstrToNimstr"],
+    mFloatToStr: ["cstrToNimstr", "cstrToNimstr"],
     mCStrToStr: ["cstrToNimstr", "cstrToNimstr"],
     mStrToStr: ["", ""]]
 
@@ -518,7 +516,7 @@ proc maybeMakeTempAssignable(p: PProc, n: PNode; x: TCompRes): tuple[a, tmp: Rop
       let (m1, tmp1) = maybeMakeTemp(p, n[0], address)
       let typ = skipTypes(n[0].typ, abstractPtrs)
       if typ.kind == tyArray:
-        first = firstOrd(p.config, typ.indexType)
+        first = firstOrd(p.config, typ[0])
       if optBoundsCheck in p.options:
         useMagic(p, "chckIndx")
         if first == 0: # save a couple chars
@@ -611,17 +609,6 @@ template unaryExpr(p: PProc, n: PNode, r: var TCompRes, magic, frmt: string) =
   r.res = frmt % [a, tmp]
   r.kind = resExpr
 
-proc genBreakState(p: PProc, n: PNode, r: var TCompRes) =
-  var a: TCompRes = default(TCompRes)
-  # mangle `:state` properly somehow
-  if n.kind == nkClosure:
-    gen(p, n[1], a)
-    r.res = "(($1).HEX3Astate < 0)" % [rdLoc(a)]
-  else:
-    gen(p, n, a)
-    r.res = "((($1.ClE_0).HEX3Astate) < 0)" % [rdLoc(a)]
-  r.kind = resExpr
-
 proc arithAux(p: PProc, n: PNode, r: var TCompRes, op: TMagic) =
   var
     x, y: TCompRes = default(TCompRes)
@@ -801,13 +788,7 @@ proc arithAux(p: PProc, n: PNode, r: var TCompRes, op: TMagic) =
   of mEqProc: applyFormat("($1 == $2)", "($1 == $2)")
   of mUnaryMinusI: applyFormat("negInt($1)", "-($1)")
   of mUnaryMinusI64: applyFormat("negInt64($1)", "-($1)")
-  of mAbsI:
-    let typ = n[1].typ.skipTypes(abstractVarRange)
-    if typ.kind == tyInt64 and optJsBigInt64 in p.config.globalOptions:
-      useMagic(p, "absInt64")
-      applyFormat("absInt64($1)", "absInt64($1)")
-    else:
-      applyFormat("absInt($1)", "Math.abs($1)")
+  of mAbsI: applyFormat("absInt($1)", "Math.abs($1)")
   of mNot: applyFormat("!($1)", "!($1)")
   of mUnaryPlusI: applyFormat("+($1)", "+($1)")
   of mBitnotI:
@@ -824,6 +805,8 @@ proc arithAux(p: PProc, n: PNode, r: var TCompRes, op: TMagic) =
   of mUnaryMinusF64: applyFormat("-($1)", "-($1)")
   of mCharToStr: applyFormat("nimCharToStr($1)", "nimCharToStr($1)")
   of mBoolToStr: applyFormat("nimBoolToStr($1)", "nimBoolToStr($1)")
+  of mIntToStr: applyFormat("cstrToNimstr(($1) + \"\")", "cstrToNimstr(($1) + \"\")")
+  of mInt64ToStr: applyFormat("cstrToNimstr(($1) + \"\")", "cstrToNimstr(($1) + \"\")")
   of mCStrToStr: applyFormat("cstrToNimstr($1)", "cstrToNimstr($1)")
   of mStrToStr, mUnown, mIsolate, mFinished: applyFormat("$1", "$1")
   else:
@@ -844,7 +827,7 @@ proc arith(p: PProc, n: PNode, r: var TCompRes, op: TMagic) =
     arithAux(p, n, r, op)
   of mModI:
     arithAux(p, n, r, op)
-  of mCharToStr, mBoolToStr, mCStrToStr, mStrToStr, mEnumToStr:
+  of mCharToStr, mBoolToStr, mIntToStr, mInt64ToStr, mCStrToStr, mStrToStr, mEnumToStr:
     arithAux(p, n, r, op)
   of mEqRef:
     if mapType(n[1].typ) != etyBaseIndex:
@@ -854,11 +837,6 @@ proc arith(p: PProc, n: PNode, r: var TCompRes, op: TMagic) =
       gen(p, n[1], x)
       gen(p, n[2], y)
       r.res = "($# == $# && $# == $#)" % [x.address, y.address, x.res, y.res]
-  of mEqProc:
-    if skipTypes(n[1].typ, abstractInst).callConv == ccClosure:
-      binaryExpr(p, n, r, "cmpClosures", "cmpClosures($1, $2)")
-    else:
-      arithAux(p, n, r, op)
   else:
     arithAux(p, n, r, op)
   r.kind = resExpr
@@ -948,7 +926,7 @@ proc genTry(p: PProc, n: PNode, r: var TCompRes) =
     p.body.add("++excHandler;\L")
   var tmpFramePtr = rope"F"
   lineF(p, "try {$n", [])
-  var a: TCompRes = default(TCompRes)
+  var a: TCompRes
   gen(p, n[0], a)
   moveInto(p, a, r)
   var generalCatchBranchExists = false
@@ -992,7 +970,7 @@ proc genTry(p: PProc, n: PNode, r: var TCompRes) =
         # if isJsObject(throwObj.typ):
         if isImportedException(throwObj.typ, p.config):
           orExpr.addf("lastJSError instanceof $1",
-            [throwObj.typ.sym.loc.snippet])
+            [throwObj.typ.sym.loc.r])
         else:
           orExpr.addf("isObj(lastJSError.m_type, $1)",
                [genTypeInfo(p, throwObj.typ)])
@@ -1002,8 +980,8 @@ proc genTry(p: PProc, n: PNode, r: var TCompRes) =
       # If some branch requires a local alias introduce it here. This is needed
       # since JS cannot do ``catch x as y``.
       if excAlias != nil:
-        excAlias.sym.loc.snippet = mangleName(p.module, excAlias.sym)
-        lineF(p, "var $1 = lastJSError;$n", excAlias.sym.loc.snippet)
+        excAlias.sym.loc.r = mangleName(p.module, excAlias.sym)
+        lineF(p, "var $1 = lastJSError;$n", excAlias.sym.loc.r)
       gen(p, n[i][^1], a)
       moveInto(p, a, r)
       lineF(p, "}$n", [])
@@ -1041,7 +1019,7 @@ proc genCaseJS(p: PProc, n: PNode, r: var TCompRes) =
     a, b, cond, stmt: TCompRes = default(TCompRes)
   genLineDir(p, n)
   gen(p, n[0], cond)
-  let typeKind = skipTypes(n[0].typ, abstractVar+{tyRange}).kind
+  let typeKind = skipTypes(n[0].typ, abstractVar).kind
   var transferRange = false
   let anyString = typeKind in {tyString, tyCstring}
   case typeKind
@@ -1109,19 +1087,14 @@ proc genCaseJS(p: PProc, n: PNode, r: var TCompRes) =
           lineF(p, "break;$n", [])
     of nkElse:
       if transferRange:
-        if n.len == 2: # a dangling else for a case statement
-          transferRange = false
-          lineF(p, "switch ($1) {$n", [cond.rdLoc])
-          lineF(p, "default: $n", [])
-        else:
-          lineF(p, "else{$n", [])
+         lineF(p, "else{$n", [])
       else:
         lineF(p, "default: $n", [])
       p.nested:
         gen(p, it[0], stmt)
         moveInto(p, stmt, r)
         if transferRange:
-          lineF(p, "}$n", [])
+           lineF(p, "}$n", [])
         else:
           lineF(p, "break;$n", [])
     else: internalError(p.config, it.info, "jsgen.genCaseStmt")
@@ -1163,14 +1136,10 @@ proc genBreakStmt(p: PProc, n: PNode) =
   p.blocks[idx].id = abs(p.blocks[idx].id) # label is used
   lineF(p, "break Label$1;$n", [rope(p.blocks[idx].id)])
 
-proc genAsmOrEmitStmt(p: PProc, n: PNode; isAsmStmt = false) =
+proc genAsmOrEmitStmt(p: PProc, n: PNode) =
   genLineDir(p, n)
   p.body.add p.indentLine("")
-  let offset =
-    if isAsmStmt: 1 # first son is pragmas
-    else: 0
-
-  for i in offset..<n.len:
+  for i in 0..<n.len:
     let it = n[i]
     case it.kind
     of nkStrLit..nkTripleStrLit:
@@ -1225,17 +1194,8 @@ proc genIf(p: PProc, n: PNode, r: var TCompRes) =
     lineF(p, "}$n", [])
   line(p, repeat('}', toClose) & "\L")
 
-proc generateHeader(p: PProc, prc: PSym): Rope =
+proc generateHeader(p: PProc, typ: PType): Rope =
   result = ""
-  let typ = prc.typ
-  if jsNoLambdaLifting notin p.config.legacyFeatures:
-    if typ.callConv == ccClosure:
-      # we treat Env as the `this` parameter of the function
-      # to keep it simple
-      let env = prc.ast[paramsPos].lastSon
-      assert env.kind == nkSym, "env is missing"
-      env.sym.loc.snippet = "this"
-
   for i in 1..<typ.n.len:
     assert(typ.n[i].kind == nkSym)
     var param = typ.n[i].sym
@@ -1268,10 +1228,9 @@ const
 
 proc needsNoCopy(p: PProc; y: PNode): bool =
   return y.kind in nodeKindsNeedNoCopy or
-        ((mapType(y.typ) != etyBaseIndex or
-          (jsNoLambdaLifting in p.config.legacyFeatures and y.kind == nkSym and y.sym.kind == skParam)) and
+        ((mapType(y.typ) != etyBaseIndex or (y.kind == nkSym and y.sym.kind == skParam)) and
           (skipTypes(y.typ, abstractInst).kind in
-            {tyRef, tyPtr, tyLent, tyVar, tyCstring, tyProc, tyOwned, tyOpenArray} + IntegralTypes))
+            {tyRef, tyPtr, tyLent, tyVar, tyCstring, tyProc, tyOwned} + IntegralTypes))
 
 proc genAsgnAux(p: PProc, x, y: PNode, noCopyNeeded: bool) =
   var a, b: TCompRes = default(TCompRes)
@@ -1298,7 +1257,7 @@ proc genAsgnAux(p: PProc, x, y: PNode, noCopyNeeded: bool) =
       lineF(p, "$1 = nimCopy(null, $2, $3);$n",
                [a.rdLoc, b.res, genTypeInfo(p, y.typ)])
   of etyObject:
-    if x.typ.kind in {tyVar, tyLent, tyOpenArray, tyVarargs} or (needsNoCopy(p, y) and needsNoCopy(p, x)) or noCopyNeeded:
+    if x.typ.kind in {tyVar, tyLent} or (needsNoCopy(p, y) and needsNoCopy(p, x)) or noCopyNeeded:
       lineF(p, "$1 = $2;$n", [a.rdLoc, b.rdLoc])
     else:
       useMagic(p, "nimCopy")
@@ -1353,10 +1312,19 @@ proc genFastAsgn(p: PProc, n: PNode) =
   genAsgnAux(p, n[0], n[1], noCopyNeeded=noCopy)
 
 proc genSwap(p: PProc, n: PNode) =
-  let stmtList = lowerSwap(p.module.graph, n, p.module.idgen, if p.prc != nil: p.prc else: p.module.module)
-  assert stmtList.kind == nkStmtList
-  for i in 0..<stmtList.len:
-    genStmt(p, stmtList[i])
+  var a, b: TCompRes = default(TCompRes)
+  gen(p, n[1], a)
+  gen(p, n[2], b)
+  var tmp = p.getTemp(false)
+  if mapType(p, skipTypes(n[1].typ, abstractVar)) == etyBaseIndex:
+    let tmp2 = p.getTemp(false)
+    if a.typ != etyBaseIndex or b.typ != etyBaseIndex:
+      internalError(p.config, n.info, "genSwap")
+    lineF(p, "var $1 = $2; $2 = $3; $3 = $1;$n",
+             [tmp, a.address, b.address])
+    tmp = tmp2
+  lineF(p, "var $1 = $2; $2 = $3; $3 = $1;",
+           [tmp, a.res, b.res])
 
 proc getFieldPosition(p: PProc; f: PNode): int =
   case f.kind
@@ -1376,8 +1344,8 @@ proc genFieldAddr(p: PProc, n: PNode, r: var TCompRes) =
   else:
     if b[1].kind != nkSym: internalError(p.config, b[1].info, "genFieldAddr")
     var f = b[1].sym
-    if f.loc.snippet == "": f.loc.snippet = mangleName(p.module, f)
-    r.res = makeJSString($f.loc.snippet)
+    if f.loc.r == "": f.loc.r = mangleName(p.module, f)
+    r.res = makeJSString($f.loc.r)
   internalAssert p.config, a.typ != etyBaseIndex
   r.address = a.res
   r.kind = resExpr
@@ -1404,8 +1372,8 @@ proc genFieldAccess(p: PProc, n: PNode, r: var TCompRes) =
   else:
     if n[1].kind != nkSym: internalError(p.config, n[1].info, "genFieldAccess")
     var f = n[1].sym
-    if f.loc.snippet == "": f.loc.snippet = mangleName(p.module, f)
-    r.res = "$1.$2" % [r.res, f.loc.snippet]
+    if f.loc.r == "": f.loc.r = mangleName(p.module, f)
+    r.res = "$1.$2" % [r.res, f.loc.r]
     mkTemp(1)
   r.kind = resExpr
 
@@ -1425,11 +1393,11 @@ proc genCheckedFieldOp(p: PProc, n: PNode, addrTyp: PType, r: var TCompRes) =
   # Field symbol
   var field = accessExpr[1].sym
   internalAssert p.config, field.kind == skField
-  if field.loc.snippet == "": field.loc.snippet = mangleName(p.module, field)
+  if field.loc.r == "": field.loc.r = mangleName(p.module, field)
   # Discriminant symbol
   let disc = checkExpr[2].sym
   internalAssert p.config, disc.kind == skField
-  if disc.loc.snippet == "": disc.loc.snippet = mangleName(p.module, disc)
+  if disc.loc.r == "": disc.loc.r = mangleName(p.module, disc)
 
   var setx: TCompRes = default(TCompRes)
   gen(p, checkExpr[1], setx)
@@ -1446,16 +1414,16 @@ proc genCheckedFieldOp(p: PProc, n: PNode, addrTyp: PType, r: var TCompRes) =
   useMagic(p, "reprDiscriminant") # no need to offset by firstOrd unlike for cgen
   let msg = genFieldDefect(p.config, field.name.s, disc)
   lineF(p, "if ($1[$2.$3]$4undefined) { raiseFieldError2(makeNimstrLit($5), reprDiscriminant($2.$3, $6)); }$n",
-    setx.res, tmp, disc.loc.snippet, if negCheck: "!==" else: "===",
+    setx.res, tmp, disc.loc.r, if negCheck: "!==" else: "===",
     makeJSString(msg), genTypeInfo(p, disc.typ))
 
   if addrTyp != nil and mapType(p, addrTyp) == etyBaseIndex:
     r.typ = etyBaseIndex
-    r.res = makeJSString($field.loc.snippet)
+    r.res = makeJSString($field.loc.r)
     r.address = tmp
   else:
     r.typ = etyNone
-    r.res = "$1.$2" % [tmp, field.loc.snippet]
+    r.res = "$1.$2" % [tmp, field.loc.r]
   r.kind = resExpr
 
 proc genArrayAddr(p: PProc, n: PNode, r: var TCompRes) =
@@ -1471,7 +1439,7 @@ proc genArrayAddr(p: PProc, n: PNode, r: var TCompRes) =
   r.address = x
   var typ = skipTypes(m[0].typ, abstractPtrs)
   if typ.kind == tyArray:
-    first = firstOrd(p.config, typ.indexType)
+    first = firstOrd(p.config, typ[0])
   if optBoundsCheck in p.options:
     useMagic(p, "chckIndx")
     if first == 0: # save a couple chars
@@ -1486,8 +1454,8 @@ proc genArrayAddr(p: PProc, n: PNode, r: var TCompRes) =
   r.kind = resExpr
 
 proc genArrayAccess(p: PProc, n: PNode, r: var TCompRes) =
-  var ty = skipTypes(n[0].typ, abstractVarRange+tyUserTypeClasses)
-  if ty.kind in {tyRef, tyPtr, tyLent, tyOwned}: ty = skipTypes(ty.elementType, abstractVarRange)
+  var ty = skipTypes(n[0].typ, abstractVarRange)
+  if ty.kind in {tyRef, tyPtr, tyLent, tyOwned}: ty = skipTypes(ty.lastSon, abstractVarRange)
   case ty.kind
   of tyArray, tyOpenArray, tySequence, tyString, tyCstring, tyVarargs:
     genArrayAddr(p, n, r)
@@ -1522,10 +1490,10 @@ template isIndirect(x: PSym): bool =
 
 proc genSymAddr(p: PProc, n: PNode, typ: PType, r: var TCompRes) =
   let s = n.sym
-  if s.loc.snippet == "": internalError(p.config, n.info, "genAddr: 3")
+  if s.loc.r == "": internalError(p.config, n.info, "genAddr: 3")
   case s.kind
   of skParam:
-    r.res = s.loc.snippet
+    r.res = s.loc.r
     r.address = ""
     r.typ = etyNone
   of skVar, skLet, skResult:
@@ -1539,15 +1507,15 @@ proc genSymAddr(p: PProc, n: PNode, typ: PType, r: var TCompRes) =
       # make addr() a no-op:
       r.typ = etyNone
       if isIndirect(s):
-        r.res = s.loc.snippet & "[0]"
+        r.res = s.loc.r & "[0]"
       else:
-        r.res = s.loc.snippet
+        r.res = s.loc.r
       r.address = ""
     elif {sfGlobal, sfAddrTaken} * s.flags != {} or jsType == etyBaseIndex:
       # for ease of code generation, we do not distinguish between
       # sfAddrTaken and sfGlobal.
       r.typ = etyBaseIndex
-      r.address = s.loc.snippet
+      r.address = s.loc.r
       r.res = rope("0")
     else:
       # 'var openArray' for instance produces an 'addr' but this is harmless:
@@ -1574,7 +1542,7 @@ proc genAddr(p: PProc, n: PNode, r: var TCompRes) =
       if ty.kind in MappedToObject:
         gen(p, n[0], r)
       else:
-        let kindOfIndexedExpr = skipTypes(n[0][0].typ, abstractVarRange+tyUserTypeClasses).kind
+        let kindOfIndexedExpr = skipTypes(n[0][0].typ, abstractVarRange).kind
         case kindOfIndexedExpr
         of tyArray, tyOpenArray, tySequence, tyString, tyCstring, tyVarargs:
           genArrayAddr(p, n[0], r)
@@ -1620,15 +1588,12 @@ proc attachProc(p: PProc; s: PSym) =
 
 proc genProcForSymIfNeeded(p: PProc, s: PSym) =
   if not p.g.generatedSyms.containsOrIncl(s.id):
-    if jsNoLambdaLifting in p.config.legacyFeatures:
-      let newp = genProc(p, s)
-      var owner = p
-      while owner != nil and owner.prc != s.owner:
-        owner = owner.up
-      if owner != nil: owner.locals.add(newp)
-      else: attachProc(p, newp, s)
-    else:
-      attachProc(p, s)
+    let newp = genProc(p, s)
+    var owner = p
+    while owner != nil and owner.prc != s.owner:
+      owner = owner.up
+    if owner != nil: owner.locals.add(newp)
+    else: attachProc(p, newp, s)
 
 proc genCopyForParamIfNeeded(p: PProc, n: PNode) =
   let s = n.sym
@@ -1640,7 +1605,7 @@ proc genCopyForParamIfNeeded(p: PProc, n: PNode) =
       internalError(p.config, n.info, "couldn't find the owner proc of the closed over param: " & s.name.s)
     if owner.prc == s.owner:
       if not owner.generatedParamCopies.containsOrIncl(s.id):
-        let copy = "$1 = nimCopy(null, $1, $2);$n" % [s.loc.snippet, genTypeInfo(p, s.typ)]
+        let copy = "$1 = nimCopy(null, $1, $2);$n" % [s.loc.r, genTypeInfo(p, s.typ)]
         owner.locals.add(owner.indentLine(copy))
       return
     owner = owner.up
@@ -1651,40 +1616,40 @@ proc genSym(p: PProc, n: PNode, r: var TCompRes) =
   var s = n.sym
   case s.kind
   of skVar, skLet, skParam, skTemp, skResult, skForVar:
-    if s.loc.snippet == "":
+    if s.loc.r == "":
       internalError(p.config, n.info, "symbol has no generated name: " & s.name.s)
     if sfCompileTime in s.flags:
       genVarInit(p, s, if s.astdef != nil: s.astdef else: newNodeI(nkEmpty, s.info))
-    if jsNoLambdaLifting in p.config.legacyFeatures and s.kind == skParam:
+    if s.kind == skParam:
       genCopyForParamIfNeeded(p, n)
     let k = mapType(p, s.typ)
     if k == etyBaseIndex:
       r.typ = etyBaseIndex
       if {sfAddrTaken, sfGlobal} * s.flags != {}:
         if isIndirect(s):
-          r.address = "$1[0][0]" % [s.loc.snippet]
-          r.res = "$1[0][1]" % [s.loc.snippet]
+          r.address = "$1[0][0]" % [s.loc.r]
+          r.res = "$1[0][1]" % [s.loc.r]
         else:
-          r.address = "$1[0]" % [s.loc.snippet]
-          r.res = "$1[1]" % [s.loc.snippet]
+          r.address = "$1[0]" % [s.loc.r]
+          r.res = "$1[1]" % [s.loc.r]
       else:
-        r.address = s.loc.snippet
-        r.res = s.loc.snippet & "_Idx"
+        r.address = s.loc.r
+        r.res = s.loc.r & "_Idx"
     elif isIndirect(s):
-      r.res = "$1[0]" % [s.loc.snippet]
+      r.res = "$1[0]" % [s.loc.r]
     else:
-      r.res = s.loc.snippet
+      r.res = s.loc.r
   of skConst:
     genConstant(p, s)
-    if s.loc.snippet == "":
+    if s.loc.r == "":
       internalError(p.config, n.info, "symbol has no generated name: " & s.name.s)
-    r.res = s.loc.snippet
-  of skProc, skFunc, skConverter, skMethod, skIterator:
+    r.res = s.loc.r
+  of skProc, skFunc, skConverter, skMethod:
     if sfCompileTime in s.flags:
       localError(p.config, n.info, "request to generate code for .compileTime proc: " &
           s.name.s)
     discard mangleName(p.module, s)
-    r.res = s.loc.snippet
+    r.res = s.loc.r
     if lfNoDecl in s.loc.flags or s.magic notin generatedMagics or
        {sfImportc, sfInfixCall} * s.flags != {}:
       discard
@@ -1696,13 +1661,13 @@ proc genSym(p: PProc, n: PNode, r: var TCompRes) =
     else:
       genProcForSymIfNeeded(p, s)
   else:
-    if s.loc.snippet == "":
+    if s.loc.r == "":
       internalError(p.config, n.info, "symbol has no generated name: " & s.name.s)
     if mapType(p, s.typ) == etyBaseIndex:
-      r.address = s.loc.snippet
-      r.res = s.loc.snippet & "_Idx"
+      r.address = s.loc.r
+      r.res = s.loc.r & "_Idx"
     else:
-      r.res = s.loc.snippet
+      r.res = s.loc.r
   r.kind = resVal
 
 proc genDeref(p: PProc, n: PNode, r: var TCompRes) =
@@ -1844,9 +1809,9 @@ proc genPatternCall(p: PProc; n: PNode; pat: string; typ: PType;
 proc genInfixCall(p: PProc, n: PNode, r: var TCompRes) =
   # don't call '$' here for efficiency:
   let f = n[0].sym
-  if f.loc.snippet == "": f.loc.snippet = mangleName(p.module, f)
+  if f.loc.r == "": f.loc.r = mangleName(p.module, f)
   if sfInfixCall in f.flags:
-    let pat = $n[0].sym.loc.snippet
+    let pat = $n[0].sym.loc.r
     internalAssert p.config, pat.len > 0
     if pat.contains({'#', '(', '@'}):
       var typ = skipTypes(n[0].typ, abstractInst)
@@ -1924,7 +1889,7 @@ proc createObjInitList(p: PProc, typ: PType, excludedFieldIDs: IntSet, output: v
   while t != nil:
     t = t.skipTypes(skipPtrs)
     createRecordVarAux(p, t.n, excludedFieldIDs, output)
-    t = t.baseClass
+    t = t[0]
 
 proc arrayTypeForElemType(conf: ConfigRef; typ: PType): string =
   let typ = typ.skipTypes(abstractRange)
@@ -1961,7 +1926,7 @@ proc createVar(p: PProc, typ: PType, indirect: bool): Rope =
   of tyInt8..tyInt32, tyUInt8..tyUInt32, tyEnum, tyChar:
     result = putToSeq("0", indirect)
   of tyInt, tyUInt:
-    if $t.sym.loc.snippet == "bigint":
+    if $t.sym.loc.r == "bigint":
       result = putToSeq("0n", indirect)
     else:
       result = putToSeq("0", indirect)
@@ -1973,7 +1938,7 @@ proc createVar(p: PProc, typ: PType, indirect: bool): Rope =
   of tyFloat..tyFloat128:
     result = putToSeq("0.0", indirect)
   of tyRange, tyGenericInst, tyAlias, tySink, tyOwned, tyLent:
-    result = createVar(p, skipModifier(typ), indirect)
+    result = createVar(p, lastSon(typ), indirect)
   of tySet:
     result = putToSeq("{}", indirect)
   of tyBool:
@@ -2021,11 +1986,11 @@ proc createVar(p: PProc, typ: PType, indirect: bool): Rope =
       result = putToSeq("null", indirect)
   of tySequence, tyString:
     result = putToSeq("[]", indirect)
-  of tyCstring, tyProc, tyOpenArray:
+  of tyCstring, tyProc:
     result = putToSeq("null", indirect)
   of tyStatic:
     if t.n != nil:
-      result = createVar(p, skipModifier t, indirect)
+      result = createVar(p, lastSon t, indirect)
     else:
       internalError(p.config, "createVar: " & $t.kind)
       result = ""
@@ -2073,7 +2038,7 @@ proc genVarInit(p: PProc, v: PSym, n: PNode) =
     gen(p, n, a)
     case mapType(p, v.typ)
     of etyObject, etySeq:
-      if v.typ.kind in {tyOpenArray, tyVarargs} or needsNoCopy(p, n):
+      if needsNoCopy(p, n):
         s = a.res
       else:
         useMagic(p, "nimCopy")
@@ -2083,44 +2048,33 @@ proc genVarInit(p: PProc, v: PSym, n: PNode) =
       if a.typ == etyBaseIndex:
         if targetBaseIndex:
           line(p, runtimeFormat(varCode & " = $3, $2_Idx = $4;$n",
-                   [returnType, v.loc.snippet, a.address, a.res]))
+                   [returnType, v.loc.r, a.address, a.res]))
         else:
           if isIndirect(v):
             line(p, runtimeFormat(varCode & " = [[$3, $4]];$n",
-                     [returnType, v.loc.snippet, a.address, a.res]))
+                     [returnType, v.loc.r, a.address, a.res]))
           else:
             line(p, runtimeFormat(varCode & " = [$3, $4];$n",
-                     [returnType, v.loc.snippet, a.address, a.res]))
+                     [returnType, v.loc.r, a.address, a.res]))
       else:
         if targetBaseIndex:
           let tmp = p.getTemp
           lineF(p, "var $1 = $2, $3 = $1[0], $3_Idx = $1[1];$n",
-                   [tmp, a.res, v.loc.snippet])
+                   [tmp, a.res, v.loc.r])
         else:
-          line(p, runtimeFormat(varCode & " = $3;$n", [returnType, v.loc.snippet, a.res]))
+          line(p, runtimeFormat(varCode & " = $3;$n", [returnType, v.loc.r, a.res]))
       return
     else:
       s = a.res
     if isIndirect(v):
-      line(p, runtimeFormat(varCode & " = [$3];$n", [returnType, v.loc.snippet, s]))
+      line(p, runtimeFormat(varCode & " = [$3];$n", [returnType, v.loc.r, s]))
     else:
-      line(p, runtimeFormat(varCode & " = $3;$n", [returnType, v.loc.snippet, s]))
+      line(p, runtimeFormat(varCode & " = $3;$n", [returnType, v.loc.r, s]))
 
   if useReloadingGuard or useGlobalPragmas:
     dec p.extraIndent
     lineF(p, "}$n")
 
-proc genClosureVar(p: PProc, n: PNode) =
-  # assert n[2].kind != nkEmpty
-  # TODO: fixme transform `var env.x` into `var env.x = default()` after
-  # the order of transf and lambdalifting is fixed
-  if n[2].kind != nkEmpty:
-    genAsgnAux(p, n[0], n[2], false)
-  else:
-    var a: TCompRes = default(TCompRes)
-    gen(p, n[0], a)
-    line(p, runtimeFormat("$1 = $2;$n", [rdLoc(a), createVar(p, n[0].typ, false)]))
-
 proc genVarStmt(p: PProc, n: PNode) =
   for i in 0..<n.len:
     var a = n[i]
@@ -2130,17 +2084,15 @@ proc genVarStmt(p: PProc, n: PNode) =
         genStmt(p, unpacked)
       else:
         assert(a.kind == nkIdentDefs)
-        if a[0].kind == nkSym:
-          var v = a[0].sym
-          if lfNoDecl notin v.loc.flags and sfImportc notin v.flags:
-            genLineDir(p, a)
-            if sfCompileTime notin v.flags:
-              genVarInit(p, v, a[2])
-            else:
-              # lazy emit, done when it's actually used.
-              if v.ast == nil: v.ast = a[2]
-        else: # closure
-          genClosureVar(p, a)
+        assert(a[0].kind == nkSym)
+        var v = a[0].sym
+        if lfNoDecl notin v.loc.flags and sfImportc notin v.flags:
+          genLineDir(p, a)
+          if sfCompileTime notin v.flags:
+            genVarInit(p, v, a[2])
+          else:
+            # lazy emit, done when it's actually used.
+            if v.ast == nil: v.ast = a[2]
 
 proc genConstant(p: PProc, c: PSym) =
   if lfNoDecl notin c.loc.flags and not p.g.generatedSyms.containsOrIncl(c.id):
@@ -2187,20 +2139,20 @@ proc genConStrStr(p: PProc, n: PNode, r: var TCompRes) =
   if skipTypes(n[1].typ, abstractVarRange).kind == tyChar:
     r.res.add("[$1].concat(" % [a.res])
   else:
-    r.res.add("($1).concat(" % [a.res])
+    r.res.add("($1 || []).concat(" % [a.res])
 
   for i in 2..<n.len - 1:
     gen(p, n[i], a)
     if skipTypes(n[i].typ, abstractVarRange).kind == tyChar:
       r.res.add("[$1]," % [a.res])
     else:
-      r.res.add("$1," % [a.res])
+      r.res.add("$1 || []," % [a.res])
 
   gen(p, n[^1], a)
   if skipTypes(n[^1].typ, abstractVarRange).kind == tyChar:
     r.res.add("[$1])" % [a.res])
   else:
-    r.res.add("$1)" % [a.res])
+    r.res.add("$1 || [])" % [a.res])
 
 proc genReprAux(p: PProc, n: PNode, r: var TCompRes, magic: string, typ: Rope = "") =
   useMagic(p, magic)
@@ -2267,17 +2219,16 @@ proc genDefault(p: PProc, n: PNode; r: var TCompRes) =
   r.res = createVar(p, n.typ, indirect = false)
   r.kind = resExpr
 
-proc genWasMoved(p: PProc, n: PNode) =
-  # TODO: it should be done by nir
+proc genReset(p: PProc, n: PNode) =
   var x: TCompRes = default(TCompRes)
+  useMagic(p, "genericReset")
   gen(p, n[1], x)
   if x.typ == etyBaseIndex:
     lineF(p, "$1 = null, $2 = 0;$n", [x.address, x.res])
   else:
-    var y: TCompRes = default(TCompRes)
-    genDefault(p, n[1], y)
-    let (a, _) = maybeMakeTempAssignable(p, n[1], x)
-    lineF(p, "$1 = $2;$n", [a, y.rdLoc])
+    let (a, tmp) = maybeMakeTempAssignable(p, n[1], x)
+    lineF(p, "$1 = genericReset($3, $2);$n", [a,
+                  genTypeInfo(p, n[1].typ), tmp])
 
 proc genMove(p: PProc; n: PNode; r: var TCompRes) =
   var a: TCompRes = default(TCompRes)
@@ -2285,7 +2236,7 @@ proc genMove(p: PProc; n: PNode; r: var TCompRes) =
   r.res = p.getTemp()
   gen(p, n[1], a)
   lineF(p, "$1 = $2;$n", [r.rdLoc, a.rdLoc])
-  genWasMoved(p, n)
+  genReset(p, n)
   #lineF(p, "$1 = $2;$n", [dest.rdLoc, src.rdLoc])
 
 proc genDup(p: PProc; n: PNode; r: var TCompRes) =
@@ -2466,7 +2417,7 @@ proc genMagic(p: PProc, n: PNode, r: var TCompRes) =
   of mNewSeqOfCap: unaryExpr(p, n, r, "", "[]")
   of mOf: genOf(p, n, r)
   of mDefault, mZeroDefault: genDefault(p, n, r)
-  of mWasMoved: genWasMoved(p, n)
+  of mReset, mWasMoved: genReset(p, n)
   of mEcho: genEcho(p, n, r)
   of mNLen..mNError, mSlurp, mStaticExec:
     localError(p.config, n.info, errXMustBeCompileTime % n[0].sym.name.s)
@@ -2579,17 +2530,17 @@ proc genObjConstr(p: PProc, n: PNode, r: var TCompRes) =
     let val = it[1]
     gen(p, val, a)
     var f = it[0].sym
-    if f.loc.snippet == "": f.loc.snippet = mangleName(p.module, f)
+    if f.loc.r == "": f.loc.r = mangleName(p.module, f)
     fieldIDs.incl(lookupFieldAgain(n.typ.skipTypes({tyDistinct}), f).id)
 
     let typ = val.typ.skipTypes(abstractInst)
     if a.typ == etyBaseIndex:
-      initList.addf("$#: [$#, $#]", [f.loc.snippet, a.address, a.res])
+      initList.addf("$#: [$#, $#]", [f.loc.r, a.address, a.res])
     else:
       if not needsNoCopy(p, val):
         useMagic(p, "nimCopy")
         a.res = "nimCopy(null, $1, $2)" % [a.rdLoc, genTypeInfo(p, typ)]
-      initList.addf("$#: $#", [f.loc.snippet, a.res])
+      initList.addf("$#: $#", [f.loc.r, a.res])
   let t = skipTypes(n.typ, abstractInst + skipPtrs)
   createObjInitList(p, t, fieldIDs, initList)
   r.res = ("{$1}") % [initList]
@@ -2648,13 +2599,7 @@ proc genRangeChck(p: PProc, n: PNode, r: var TCompRes, magic: string) =
   let src = skipTypes(n[0].typ, abstractVarRange)
   let dest = skipTypes(n.typ, abstractVarRange)
   if optRangeCheck notin p.options:
-    if optJsBigInt64 in p.config.globalOptions and
-          dest.kind in {tyUInt..tyUInt32, tyInt..tyInt32} and
-          src.kind in {tyInt64, tyUInt64}:
-      # conversions to Number are kept
-      r.res = "Number($1)" % [r.res]
-    else:
-      discard
+    return
   elif dest.kind in {tyUInt..tyUInt64} and checkUnsignedConversions notin p.config.legacyFeatures:
     if src.kind in {tyInt64, tyUInt64} and optJsBigInt64 in p.config.globalOptions:
       r.res = "BigInt.asUintN($1, $2)" % [$(dest.size * 8), r.res]
@@ -2753,8 +2698,8 @@ proc genProc(oldProc: PProc, prc: PSym): Rope =
   var returnStmt: Rope = ""
   var resultAsgn: Rope = ""
   var name = mangleName(p.module, prc)
-  let header = generateHeader(p, prc)
-  if prc.typ.returnType != nil and sfPure notin prc.flags:
+  let header = generateHeader(p, prc.typ)
+  if prc.typ[0] != nil and sfPure notin prc.flags:
     resultSym = prc.ast[resultPos].sym
     let mname = mangleName(p.module, resultSym)
     # otherwise uses "fat pointers"
@@ -2773,7 +2718,7 @@ proc genProc(oldProc: PProc, prc: PSym): Rope =
     else:
       returnStmt = "return $#;$n" % [a.res]
 
-  var transformedBody = transformBody(p.module.graph, p.module.idgen, prc, {})
+  var transformedBody = transformBody(p.module.graph, p.module.idgen, prc, dontUseCache)
   if sfInjectDestructors in prc.flags:
     transformedBody = injectDestructorCalls(p.module.graph, p.module.idgen, prc, transformedBody)
 
@@ -2835,9 +2780,9 @@ proc genPragma(p: PProc, n: PNode) =
     case whichPragma(it)
     of wEmit: genAsmOrEmitStmt(p, it[1])
     of wPush:
-      processPushBackendOption(p.config, p.optionsStack, p.options, n, i+1)
+      processPushBackendOption(p.optionsStack, p.options, n, i+1)
     of wPop:
-      processPopBackendOption(p.config, p.optionsStack, p.options)
+      processPopBackendOption(p.optionsStack, p.options)
     else: discard
 
 proc genCast(p: PProc, n: PNode, r: var TCompRes) =
@@ -2972,18 +2917,7 @@ proc gen(p: PProc, n: PNode, r: var TCompRes) =
       genInfixCall(p, n, r)
     else:
       genCall(p, n, r)
-  of nkClosure:
-    if jsNoLambdaLifting in p.config.legacyFeatures:
-      gen(p, n[0], r)
-    else:
-      let tmp = getTemp(p)
-      var a: TCompRes = default(TCompRes)
-      var b: TCompRes = default(TCompRes)
-      gen(p, n[0], a)
-      gen(p, n[1], b)
-      lineF(p, "$1 = $2.bind($3); $1.ClP_0 = $2; $1.ClE_0 = $3;$n", [tmp, a.rdLoc, b.rdLoc])
-      r.res = tmp
-      r.kind = resVal
+  of nkClosure: gen(p, n[0], r)
   of nkCurly: genSetConstr(p, n, r)
   of nkBracket: genArrayConstr(p, n, r)
   of nkPar, nkTupleConstr: genTupleConstr(p, n, r)
@@ -3014,7 +2948,7 @@ proc gen(p: PProc, n: PNode, r: var TCompRes) =
   of nkLambdaKinds:
     let s = n[namePos].sym
     discard mangleName(p.module, s)
-    r.res = s.loc.snippet
+    r.res = s.loc.r
     if lfNoDecl in s.loc.flags or s.magic notin generatedMagics: discard
     elif not p.g.generatedSyms.containsOrIncl(s.id):
       p.locals.add(genProc(p, s))
@@ -3046,16 +2980,17 @@ proc gen(p: PProc, n: PNode, r: var TCompRes) =
     if n[0].kind != nkEmpty:
       genLineDir(p, n)
       gen(p, n[0], r)
-      r.res = "(" & r.res & ")"
-  of nkAsmStmt:
-    warningDeprecated(p.config, n.info, "'asm' for the JS target is deprecated, use the 'emit' pragma")
-    genAsmOrEmitStmt(p, n, true)
+      r.res = "var _ = " & r.res
+  of nkAsmStmt: genAsmOrEmitStmt(p, n)
   of nkTryStmt, nkHiddenTryStmt: genTry(p, n, r)
   of nkRaiseStmt: genRaiseStmt(p, n)
   of nkTypeSection, nkCommentStmt, nkIncludeStmt,
      nkImportStmt, nkImportExceptStmt, nkExportStmt, nkExportExceptStmt,
-     nkFromStmt, nkTemplateDef, nkMacroDef, nkIteratorDef, nkStaticStmt,
+     nkFromStmt, nkTemplateDef, nkMacroDef, nkStaticStmt,
      nkMixinStmt, nkBindStmt: discard
+  of nkIteratorDef:
+    if n[0].sym.typ.callConv == TCallingConvention.ccClosure:
+      globalError(p.config, n.info, "Closure iterators are not supported by JS backend!")
   of nkPragma: genPragma(p, n)
   of nkProcDef, nkFuncDef, nkMethodDef, nkConverterDef:
     var s = n[namePos].sym
@@ -3063,9 +2998,7 @@ proc gen(p: PProc, n: PNode, r: var TCompRes) =
       genSym(p, n[namePos], r)
       r.res = ""
   of nkGotoState, nkState:
-    globalError(p.config, n.info, "not implemented")
-  of nkBreakState:
-    genBreakState(p, n[0], r)
+    globalError(p.config, n.info, "First class iterators not implemented")
   of nkPragmaBlock: gen(p, n.lastSon, r)
   of nkComesFrom:
     discard "XXX to implement for better stack traces"
@@ -3164,14 +3097,24 @@ proc wholeCode(graph: ModuleGraph; m: BModule): Rope =
       var p = newInitProc(globals, m)
       attachProc(p, prc)
 
-  generateIfMethodDispatchers(graph, m.idgen)
-  for prc in getDispatchers(graph):
+  var disp = generateMethodDispatchers(graph, m.idgen)
+  for i in 0..<disp.len:
+    let prc = disp[i].sym
     if not globals.generatedSyms.containsOrIncl(prc.id):
       var p = newInitProc(globals, m)
       attachProc(p, prc)
 
   result = globals.typeInfo & globals.constants & globals.code
 
+proc getClassName(t: PType): Rope =
+  var s = t.sym
+  if s.isNil or sfAnon in s.flags:
+    s = skipTypes(t, abstractPtrs).sym
+  if s.isNil or sfAnon in s.flags:
+    doAssert(false, "cannot retrieve class name")
+  if s.loc.r != "": result = s.loc.r
+  else: result = rope(s.name.s)
+
 proc finalJSCodeGen*(graph: ModuleGraph; b: PPassContext, n: PNode): PNode =
   ## Finalize JS code generation of a Nim module.
   ## Param `n` may contain nodes returned from the last module close call.

compiler/jstypes.nim

@@ -69,7 +69,7 @@ proc genObjectFields(p: PProc, typ: PType, n: PNode): Rope =
   else: internalError(p.config, n.info, "genObjectFields")
 
 proc objHasTypeField(t: PType): bool {.inline.} =
-  tfInheritable in t.flags or t.baseClass != nil
+  tfInheritable in t.flags or t[0] != nil
 
 proc genObjectInfo(p: PProc, typ: PType, name: Rope) =
   let kind = if objHasTypeField(typ): tyObject else: tyTuple
@@ -79,9 +79,9 @@ proc genObjectInfo(p: PProc, typ: PType, name: Rope) =
   p.g.typeInfo.addf("var NNI$1 = $2;$n",
        [rope(typ.id), genObjectFields(p, typ, typ.n)])
   p.g.typeInfo.addf("$1.node = NNI$2;$n", [name, rope(typ.id)])
-  if (typ.kind == tyObject) and (typ.baseClass != nil):
+  if (typ.kind == tyObject) and (typ[0] != nil):
     p.g.typeInfo.addf("$1.base = $2;$n",
-         [name, genTypeInfo(p, typ.baseClass.skipTypes(skipPtrs))])
+         [name, genTypeInfo(p, typ[0].skipTypes(skipPtrs))])
 
 proc genTupleFields(p: PProc, typ: PType): Rope =
   var s: Rope = ""
@@ -117,9 +117,9 @@ proc genEnumInfo(p: PProc, typ: PType, name: Rope) =
   prepend(p.g.typeInfo, s)
   p.g.typeInfo.add(n)
   p.g.typeInfo.addf("$1.node = NNI$2;$n", [name, rope(typ.id)])
-  if typ.baseClass != nil:
+  if typ[0] != nil:
     p.g.typeInfo.addf("$1.base = $2;$n",
-         [name, genTypeInfo(p, typ.baseClass)])
+         [name, genTypeInfo(p, typ[0])])
 
 proc genTypeInfo(p: PProc, typ: PType): Rope =
   let t = typ.skipTypes({tyGenericInst, tyDistinct, tyAlias, tySink, tyOwned})
@@ -127,7 +127,7 @@ proc genTypeInfo(p: PProc, typ: PType): Rope =
   if containsOrIncl(p.g.typeInfoGenerated, t.id): return
   case t.kind
   of tyDistinct:
-    result = genTypeInfo(p, t.skipModifier)
+    result = genTypeInfo(p, t[0])
   of tyPointer, tyProc, tyBool, tyChar, tyCstring, tyString, tyInt..tyUInt64:
     var s =
       "var $1 = {size: 0,kind: $2,base: null,node: null,finalizer: null};$n" %
@@ -139,18 +139,18 @@ proc genTypeInfo(p: PProc, typ: PType): Rope =
               [result, rope(ord(t.kind))]
     prepend(p.g.typeInfo, s)
     p.g.typeInfo.addf("$1.base = $2;$n",
-         [result, genTypeInfo(p, t.elementType)])
+         [result, genTypeInfo(p, t.lastSon)])
   of tyArray:
     var s =
       "var $1 = {size: 0, kind: $2, base: null, node: null, finalizer: null};$n" %
               [result, rope(ord(t.kind))]
     prepend(p.g.typeInfo, s)
     p.g.typeInfo.addf("$1.base = $2;$n",
-         [result, genTypeInfo(p, t.elementType)])
+         [result, genTypeInfo(p, t[1])])
   of tyEnum: genEnumInfo(p, t, result)
   of tyObject: genObjectInfo(p, t, result)
   of tyTuple: genTupleInfo(p, t, result)
   of tyStatic:
-    if t.n != nil: result = genTypeInfo(p, skipModifier t)
+    if t.n != nil: result = genTypeInfo(p, lastSon t)
     else: internalError(p.config, "genTypeInfo(" & $t.kind & ')')
   else: internalError(p.config, "genTypeInfo(" & $t.kind & ')')

compiler/lambdalifting.nim

@@ -10,12 +10,10 @@
 # This file implements lambda lifting for the transformator.
 
 import
-  options, ast, astalgo, msgs,
-  idents, renderer, types, magicsys, lowerings, modulegraphs, lineinfos,
+  intsets, strutils, options, ast, astalgo, msgs,
+  idents, renderer, types, magicsys, lowerings, tables, modulegraphs, lineinfos,
   transf, liftdestructors, typeallowed
 
-import std/[strutils, tables, intsets]
-
 when defined(nimPreviewSlimSystem):
   import std/assertions
 
@@ -135,23 +133,21 @@ proc createClosureIterStateType*(g: ModuleGraph; iter: PSym; idgen: IdGenerator)
   var n = newNodeI(nkRange, iter.info)
   n.add newIntNode(nkIntLit, -1)
   n.add newIntNode(nkIntLit, 0)
-  result = newType(tyRange, idgen, iter)
+  result = newType(tyRange, nextTypeId(idgen), iter)
   result.n = n
   var intType = nilOrSysInt(g)
-  if intType.isNil: intType = newType(tyInt, idgen, iter)
+  if intType.isNil: intType = newType(tyInt, nextTypeId(idgen), iter)
   rawAddSon(result, intType)
 
 proc createStateField(g: ModuleGraph; iter: PSym; idgen: IdGenerator): PSym =
   result = newSym(skField, getIdent(g.cache, ":state"), idgen, iter, iter.info)
   result.typ = createClosureIterStateType(g, iter, idgen)
 
-template isIterator*(owner: PSym): bool =
-  owner.kind == skIterator and owner.typ.callConv == ccClosure
-
 proc createEnvObj(g: ModuleGraph; idgen: IdGenerator; owner: PSym; info: TLineInfo): PType =
+  # YYY meh, just add the state field for every closure for now, it's too
+  # hard to figure out if it comes from a closure iterator:
   result = createObj(g, idgen, owner, info, final=false)
-  if owner.isIterator or not isDefined(g.config, "nimOptIters"):
-    rawAddField(result, createStateField(g, owner, idgen))
+  rawAddField(result, createStateField(g, owner, idgen))
 
 proc getClosureIterResult*(g: ModuleGraph; iter: PSym; idgen: IdGenerator): PSym =
   if resultPos < iter.ast.len:
@@ -159,7 +155,7 @@ proc getClosureIterResult*(g: ModuleGraph; iter: PSym; idgen: IdGenerator): PSym
   else:
     # XXX a bit hacky:
     result = newSym(skResult, getIdent(g.cache, ":result"), idgen, iter, iter.info, {})
-    result.typ = iter.typ.returnType
+    result.typ = iter.typ[0]
     incl(result.flags, sfUsed)
     iter.ast.add newSymNode(result)
 
@@ -174,22 +170,26 @@ proc addHiddenParam(routine: PSym, param: PSym) =
   assert sfFromGeneric in param.flags
   #echo "produced environment: ", param.id, " for ", routine.id
 
-proc getEnvParam*(routine: PSym): PSym =
+proc getHiddenParam(g: ModuleGraph; routine: PSym): PSym =
   let params = routine.ast[paramsPos]
   let hidden = lastSon(params)
   if hidden.kind == nkSym and hidden.sym.kind == skParam and hidden.sym.name.s == paramName:
     result = hidden.sym
     assert sfFromGeneric in result.flags
   else:
-    result = nil
-
-proc getHiddenParam(g: ModuleGraph; routine: PSym): PSym =
-  result = getEnvParam(routine)
-  if result.isNil:
     # writeStackTrace()
     localError(g.config, routine.info, "internal error: could not find env param for " & routine.name.s)
     result = routine
 
+proc getEnvParam*(routine: PSym): PSym =
+  let params = routine.ast[paramsPos]
+  let hidden = lastSon(params)
+  if hidden.kind == nkSym and hidden.sym.name.s == paramName:
+    result = hidden.sym
+    assert sfFromGeneric in result.flags
+  else:
+    result = nil
+
 proc interestingVar(s: PSym): bool {.inline.} =
   result = s.kind in {skVar, skLet, skTemp, skForVar, skParam, skResult} and
     sfGlobal notin s.flags and
@@ -229,20 +229,22 @@ proc makeClosure*(g: ModuleGraph; idgen: IdGenerator; prc: PSym; env: PNode; inf
     prc.flags.incl sfInjectDestructors
 
 proc interestingIterVar(s: PSym): bool {.inline.} =
-  # unused with -d:nimOptIters
   # XXX optimization: Only lift the variable if it lives across
   # yield/return boundaries! This can potentially speed up
   # closure iterators quite a bit.
   result = s.kind in {skResult, skVar, skLet, skTemp, skForVar} and sfGlobal notin s.flags
 
-template liftingHarmful(conf: ConfigRef; owner: PSym): bool =
+template isIterator*(owner: PSym): bool =
+  owner.kind == skIterator and owner.typ.callConv == ccClosure
+
+proc liftingHarmful(conf: ConfigRef; owner: PSym): bool {.inline.} =
   ## lambda lifting can be harmful for JS-like code generators.
   let isCompileTime = sfCompileTime in owner.flags or owner.kind == skMacro
-  jsNoLambdaLifting in conf.legacyFeatures and conf.backend == backendJs and not isCompileTime
+  result = conf.backend == backendJs and not isCompileTime
 
 proc createTypeBoundOpsLL(g: ModuleGraph; refType: PType; info: TLineInfo; idgen: IdGenerator; owner: PSym) =
   if owner.kind != skMacro:
-    createTypeBoundOps(g, nil, refType.elementType, info, idgen)
+    createTypeBoundOps(g, nil, refType.lastSon, info, idgen)
     createTypeBoundOps(g, nil, refType, info, idgen)
     if tfHasAsgn in refType.flags or optSeqDestructors in g.config.globalOptions:
       owner.flags.incl sfInjectDestructors
@@ -260,7 +262,8 @@ proc liftIterSym*(g: ModuleGraph; n: PNode; idgen: IdGenerator; owner: PSym): PN
   let iter = n.sym
   assert iter.isIterator
 
-  result = newNodeIT(nkStmtListExpr, n.info, iter.typ)
+  result = newNodeIT(nkStmtListExpr, n.info, n.typ)
+
   let hp = getHiddenParam(g, iter)
   var env: PNode
   if owner.isIterator:
@@ -282,7 +285,6 @@ proc liftIterSym*(g: ModuleGraph; n: PNode; idgen: IdGenerator; owner: PSym): PN
   result.add makeClosure(g, idgen, iter, env, n.info)
 
 proc freshVarForClosureIter*(g: ModuleGraph; s: PSym; idgen: IdGenerator; owner: PSym): PNode =
-  # unused with -d:nimOptIters
   let envParam = getHiddenParam(g, owner)
   let obj = envParam.typ.skipTypes({tyOwned, tyRef, tyPtr})
   let field = addField(obj, s, g.cache, idgen)
@@ -300,8 +302,8 @@ proc markAsClosure(g: ModuleGraph; owner: PSym; n: PNode) =
     localError(g.config, n.info,
       ("'$1' is of type <$2> which cannot be captured as it would violate memory" &
        " safety, declared here: $3; using '-d:nimNoLentIterators' helps in some cases." &
-       " Consider using a <ref T> which can be captured.") %
-      [s.name.s, typeToString(s.typ.skipTypes({tyVar})), g.config$s.info])
+       " Consider using a <ref $2> which can be captured.") %
+      [s.name.s, typeToString(s.typ), g.config$s.info])
   elif not (owner.typ.isClosure or owner.isNimcall and not owner.isExplicitCallConv or isEnv):
     localError(g.config, n.info, "illegal capture '$1' because '$2' has the calling convention: <$3>" %
       [s.name.s, owner.name.s, $owner.typ.callConv])
@@ -314,7 +316,6 @@ type
     processed, capturedVars: IntSet
     ownerToType: Table[int, PType]
     somethingToDo: bool
-    inTypeOf: bool
     graph: ModuleGraph
     idgen: IdGenerator
 
@@ -338,19 +339,15 @@ proc getEnvTypeForOwner(c: var DetectionPass; owner: PSym;
                         info: TLineInfo): PType =
   result = c.ownerToType.getOrDefault(owner.id)
   if result.isNil:
-    let env = getEnvParam(owner)
-    if env.isNil or not owner.isIterator or not isDefined(c.graph.config, "nimOptIters"):
-      result = newType(tyRef, c.idgen, owner)
-      let obj = createEnvObj(c.graph, c.idgen, owner, info)
-      rawAddSon(result, obj)
-    else:
-      result = env.typ
+    result = newType(tyRef, nextTypeId(c.idgen), owner)
+    let obj = createEnvObj(c.graph, c.idgen, owner, info)
+    rawAddSon(result, obj)
     c.ownerToType[owner.id] = result
 
 proc asOwnedRef(c: var DetectionPass; t: PType): PType =
   if optOwnedRefs in c.graph.config.globalOptions:
     assert t.kind == tyRef
-    result = newType(tyOwned, c.idgen, t.owner)
+    result = newType(tyOwned, nextTypeId(c.idgen), t.owner)
     result.flags.incl tfHasOwned
     result.rawAddSon t
   else:
@@ -359,7 +356,7 @@ proc asOwnedRef(c: var DetectionPass; t: PType): PType =
 proc getEnvTypeForOwnerUp(c: var DetectionPass; owner: PSym;
                           info: TLineInfo): PType =
   var r = c.getEnvTypeForOwner(owner, info)
-  result = newType(tyPtr, c.idgen, owner)
+  result = newType(tyPtr, nextTypeId(c.idgen), owner)
   rawAddSon(result, r.skipTypes({tyOwned, tyRef, tyPtr}))
 
 proc createUpField(c: var DetectionPass; dest, dep: PSym; info: TLineInfo) =
@@ -420,9 +417,6 @@ Consider:
 
 """
 
-proc isTypeOf(n: PNode): bool =
-  n.kind == nkSym and n.sym.magic in {mTypeOf, mType}
-
 proc addClosureParam(c: var DetectionPass; fn: PSym; info: TLineInfo) =
   var cp = getEnvParam(fn)
   let owner = if fn.kind == skIterator: fn else: fn.skipGenericOwner
@@ -451,7 +445,7 @@ proc detectCapturedVars(n: PNode; owner: PSym; c: var DetectionPass) =
     if innerProc:
       if s.isIterator: c.somethingToDo = true
       if not c.processed.containsOrIncl(s.id):
-        let body = transformBody(c.graph, c.idgen, s, {useCache})
+        let body = transformBody(c.graph, c.idgen, s, useCache)
         detectCapturedVars(body, s, c)
     let ow = s.skipGenericOwner
     let innerClosure = innerProc and s.typ.callConv == ccClosure and not s.isIterator
@@ -460,14 +454,12 @@ proc detectCapturedVars(n: PNode; owner: PSym; c: var DetectionPass) =
       if owner.isIterator:
         c.somethingToDo = true
         addClosureParam(c, owner, n.info)
-        if not isDefined(c.graph.config, "nimOptIters") and interestingIterVar(s):
-          if not c.capturedVars.contains(s.id):
-            if not c.inTypeOf: c.capturedVars.incl(s.id)
+        if interestingIterVar(s):
+          if not c.capturedVars.containsOrIncl(s.id):
             let obj = getHiddenParam(c.graph, owner).typ.skipTypes({tyOwned, tyRef, tyPtr})
             #let obj = c.getEnvTypeForOwner(s.owner).skipTypes({tyOwned, tyRef, tyPtr})
 
             if s.name.id == getIdent(c.graph.cache, ":state").id:
-              obj.n[0].sym.flags.incl sfNoInit
               obj.n[0].sym.itemId = ItemId(module: s.itemId.module, item: -s.itemId.item)
             else:
               discard addField(obj, s, c.graph.cache, c.idgen)
@@ -489,12 +481,10 @@ proc detectCapturedVars(n: PNode; owner: PSym; c: var DetectionPass) =
       addClosureParam(c, owner, n.info)
       #echo "capturing ", n.info
       # variable 's' is actually captured:
-      if interestingVar(s):
-        if not c.capturedVars.contains(s.id):
-          if not c.inTypeOf: c.capturedVars.incl(s.id)
-          let obj = c.getEnvTypeForOwner(ow, n.info).skipTypes({tyOwned, tyRef, tyPtr})
-          #getHiddenParam(owner).typ.skipTypes({tyOwned, tyRef, tyPtr})
-          discard addField(obj, s, c.graph.cache, c.idgen)
+      if interestingVar(s) and not c.capturedVars.containsOrIncl(s.id):
+        let obj = c.getEnvTypeForOwner(ow, n.info).skipTypes({tyOwned, tyRef, tyPtr})
+        #getHiddenParam(owner).typ.skipTypes({tyOwned, tyRef, tyPtr})
+        discard addField(obj, s, c.graph.cache, c.idgen)
       # create required upFields:
       var w = owner.skipGenericOwner
       if isInnerProc(w) or owner.isIterator:
@@ -526,14 +516,9 @@ proc detectCapturedVars(n: PNode; owner: PSym; c: var DetectionPass) =
       detectCapturedVars(n[namePos], owner, c)
   of nkReturnStmt:
     detectCapturedVars(n[0], owner, c)
-  of nkIdentDefs:
-    detectCapturedVars(n[^1], owner, c)
   else:
-    if n.isCallExpr and n[0].isTypeOf:
-      c.inTypeOf = true
     for i in 0..<n.len:
       detectCapturedVars(n[i], owner, c)
-    c.inTypeOf = false
 
 type
   LiftingPass = object
@@ -552,8 +537,8 @@ proc accessViaEnvParam(g: ModuleGraph; n: PNode; owner: PSym): PNode =
   let envParam = getHiddenParam(g, owner)
   if not envParam.isNil:
     var access = newSymNode(envParam)
-    var obj = access.typ.elementType
     while true:
+      let obj = access.typ[0]
       assert obj.kind == tyObject
       let field = getFieldFromObj(obj, s)
       if field != nil:
@@ -561,7 +546,6 @@ proc accessViaEnvParam(g: ModuleGraph; n: PNode; owner: PSym): PNode =
       let upField = lookupInRecord(obj.n, getIdent(g.cache, upName))
       if upField == nil: break
       access = rawIndirectAccess(access, upField, n.info)
-      obj = access.typ.baseClass
   localError(g.config, n.info, "internal error: environment misses: " & s.name.s)
   result = n
 
@@ -573,7 +557,7 @@ proc newEnvVar(cache: IdentCache; owner: PSym; typ: PType; info: TLineInfo; idge
   when false:
     if owner.kind == skIterator and owner.typ.callConv == ccClosure:
       let it = getHiddenParam(owner)
-      addUniqueField(it.typ.elementType, v)
+      addUniqueField(it.typ[0], v)
       result = indirectAccess(newSymNode(it), v, v.info)
     else:
       result = newSymNode(v)
@@ -759,7 +743,7 @@ proc liftCapturedVars(n: PNode; owner: PSym; d: var DetectionPass;
         #  echo renderTree(s.getBody, {renderIds})
         let oldInContainer = c.inContainer
         c.inContainer = 0
-        var body = transformBody(d.graph, d.idgen, s, {})
+        var body = transformBody(d.graph, d.idgen, s, dontUseCache)
         body = liftCapturedVars(body, s, d, c)
         if c.envVars.getOrDefault(s.id).isNil:
           s.transformedBody = body
@@ -774,7 +758,7 @@ proc liftCapturedVars(n: PNode; owner: PSym; d: var DetectionPass;
     elif s.id in d.capturedVars:
       if s.owner != owner:
         result = accessViaEnvParam(d.graph, n, owner)
-      elif owner.isIterator and not isDefined(d.graph.config, "nimOptIters") and interestingIterVar(s):
+      elif owner.isIterator and interestingIterVar(s):
         result = accessViaEnvParam(d.graph, n, owner)
       else:
         result = accessViaEnvVar(n, owner, d, c)
@@ -814,8 +798,6 @@ proc liftCapturedVars(n: PNode; owner: PSym; d: var DetectionPass;
   of nkTypeOfExpr:
     result = n
   else:
-    if n.isCallExpr and n[0].isTypeOf:
-      return
     if owner.isIterator:
       if nfLL in n.flags:
         # special case 'when nimVm' due to bug #3636:
@@ -883,19 +865,20 @@ proc liftIterToProc*(g: ModuleGraph; fn: PSym; body: PNode; ptrType: PType;
   fn.typ.callConv = oldCC
 
 proc liftLambdas*(g: ModuleGraph; fn: PSym, body: PNode; tooEarly: var bool;
-                  idgen: IdGenerator; flags: TransformFlags): PNode =
+                  idgen: IdGenerator, force: bool): PNode =
+  # XXX backend == backendJs does not suffice! The compiletime stuff needs
+  # the transformation even when compiling to JS ...
+
+  # However we can do lifting for the stuff which is *only* compiletime.
   let isCompileTime = sfCompileTime in fn.flags or fn.kind == skMacro
 
-  if body.kind == nkEmpty or (jsNoLambdaLifting in g.config.legacyFeatures and
+  if body.kind == nkEmpty or (
       g.config.backend == backendJs and not isCompileTime) or
-      (fn.skipGenericOwner.kind != skModule and force notin flags):
+      (fn.skipGenericOwner.kind != skModule and not force):
 
     # ignore forward declaration:
     result = body
     tooEarly = true
-    if fn.isIterator and isDefined(g.config, "nimOptIters"):
-      var d = initDetectionPass(g, fn, idgen)
-      addClosureParam(d, fn, body.info)
   else:
     var d = initDetectionPass(g, fn, idgen)
     detectCapturedVars(body, fn, d)
@@ -994,15 +977,12 @@ proc liftForLoop*(g: ModuleGraph; body: PNode; idgen: IdGenerator; owner: PSym):
   # gather vars in a tuple:
   var v2 = newNodeI(nkLetSection, body.info)
   var vpart = newNodeI(if body.len == 3: nkIdentDefs else: nkVarTuple, body.info)
-  if body.len == 3 and body[0].kind == nkVarTuple:
-    vpart = body[0] # fixes for (i,j) in walk() # bug #15924
-  else:
-    for i in 0..<body.len-2:
-      if body[i].kind == nkSym:
-        body[i].sym.transitionToLet()
-      vpart.add body[i]
+  for i in 0..<body.len-2:
+    if body[i].kind == nkSym:
+      body[i].sym.transitionToLet()
+    vpart.add body[i]
 
-    vpart.add newNodeI(nkEmpty, body.info) # no explicit type
+  vpart.add newNodeI(nkEmpty, body.info) # no explicit type
   if not env.isNil:
     call[0] = makeClosure(g, idgen, call[0].sym, env.newSymNode, body.info)
   vpart.add call

compiler/layouter.nim

@@ -9,7 +9,7 @@
 
 ## Layouter for nimpretty.
 
-import idents, lexer, ast, lineinfos, llstream, options, msgs, strutils, pathutils
+import idents, lexer, lineinfos, llstream, options, msgs, strutils, pathutils
 
 const
   MinLineLen = 15
@@ -243,28 +243,23 @@ proc renderTokens*(em: var Emitter): string =
 
   return content
 
-type
-  FinalCheck = proc (content: string; origAst: PNode): bool {.nimcall.}
-
-proc writeOut*(em: Emitter; content: string; origAst: PNode; check: FinalCheck) =
+proc writeOut*(em: Emitter, content: string)  =
   ## Write to disk
   let outFile = em.config.absOutFile
   if fileExists(outFile) and readFile(outFile.string) == content:
     discard "do nothing, see #9499"
     return
+  var f = llStreamOpen(outFile, fmWrite)
+  if f == nil:
+    rawMessage(em.config, errGenerated, "cannot open file: " & outFile.string)
+    return
+  f.llStreamWrite content
+  llStreamClose(f)
 
-  if check(content, origAst):
-    var f = llStreamOpen(outFile, fmWrite)
-    if f == nil:
-      rawMessage(em.config, errGenerated, "cannot open file: " & outFile.string)
-      return
-    f.llStreamWrite content
-    llStreamClose(f)
-
-proc closeEmitter*(em: var Emitter; origAst: PNode; check: FinalCheck) =
+proc closeEmitter*(em: var Emitter) =
   ## Renders emitter tokens and write to a file
   let content = renderTokens(em)
-  em.writeOut(content, origAst, check)
+  em.writeOut(content)
 
 proc wr(em: var Emitter; x: string; lt: LayoutToken) =
   em.tokens.add x

compiler/lexer.nim

@@ -16,10 +16,8 @@
 # DOS or Macintosh text files, even when it is not the native format.
 
 import
-  options, msgs, platform, idents, nimlexbase, llstream,
-  wordrecg, lineinfos, pathutils
-
-import std/[hashes, parseutils, strutils]
+  hashes, options, msgs, strutils, platform, idents, nimlexbase, llstream,
+  wordrecg, lineinfos, pathutils, parseutils
 
 when defined(nimPreviewSlimSystem):
   import std/[assertions, formatfloat]
@@ -122,6 +120,7 @@ type
                               # this is needed because scanning comments
                               # needs so much look-ahead
     currLineIndent*: int
+    strongSpaces*, allowTabs*: bool
     errorHandler*: ErrorHandler
     cache*: IdentCache
     when defined(nimsuggest):
@@ -175,6 +174,32 @@ proc printTok*(conf: ConfigRef; tok: Token) =
   # xxx factor with toLocation
   msgWriteln(conf, $tok.line & ":" & $tok.col & "\t" & $tok.tokType & " " & $tok)
 
+proc initToken*(L: var Token) =
+  L.tokType = tkInvalid
+  L.iNumber = 0
+  L.indent = 0
+  L.spacing = {}
+  L.literal = ""
+  L.fNumber = 0.0
+  L.base = base10
+  L.ident = nil
+  when defined(nimpretty):
+    L.commentOffsetA = 0
+    L.commentOffsetB = 0
+
+proc fillToken(L: var Token) =
+  L.tokType = tkInvalid
+  L.iNumber = 0
+  L.indent = 0
+  L.spacing = {}
+  setLen(L.literal, 0)
+  L.fNumber = 0.0
+  L.base = base10
+  L.ident = nil
+  when defined(nimpretty):
+    L.commentOffsetA = 0
+    L.commentOffsetB = 0
+
 proc openLexer*(lex: var Lexer, fileIdx: FileIndex, inputstream: PLLStream;
                  cache: IdentCache; config: ConfigRef) =
   openBaseLexer(lex, inputstream)
@@ -300,7 +325,8 @@ proc getNumber(L: var Lexer, result: var Token) =
     # Used to get slightly human friendlier err messages.
     const literalishChars = {'A'..'Z', 'a'..'z', '0'..'9', '_', '.', '\''}
     var msgPos = L.bufpos
-    var t = Token(literal: "")
+    var t: Token
+    t.literal = ""
     L.bufpos = startpos # Use L.bufpos as pos because of matchChars
     matchChars(L, t, literalishChars)
     # We must verify +/- specifically so that we're not past the literal
@@ -770,7 +796,7 @@ proc getString(L: var Lexer, tok: var Token, mode: StringMode) =
     if mode != normal: tok.tokType = tkRStrLit
     else: tok.tokType = tkStrLit
     while true:
-      let c = L.buf[pos]
+      var c = L.buf[pos]
       if c == '\"':
         if mode != normal and L.buf[pos+1] == '\"':
           inc(pos, 2)
@@ -796,7 +822,7 @@ proc getCharacter(L: var Lexer; tok: var Token) =
   tokenBegin(tok, L.bufpos)
   let startPos = L.bufpos
   inc(L.bufpos)               # skip '
-  let c = L.buf[L.bufpos]
+  var c = L.buf[L.bufpos]
   case c
   of '\0'..pred(' '), '\'':
     lexMessage(L, errGenerated, "invalid character literal")
@@ -914,7 +940,7 @@ proc getOperator(L: var Lexer, tok: var Token) =
   tokenBegin(tok, pos)
   var h: Hash = 0
   while true:
-    let c = L.buf[pos]
+    var c = L.buf[pos]
     if c in OpChars:
       h = h !& ord(c)
       inc(pos)
@@ -982,6 +1008,23 @@ proc getPrecedence*(tok: Token): int =
   of tkOr, tkXor, tkPtr, tkRef: result = 3
   else: return -10
 
+proc newlineFollows*(L: Lexer): bool =
+  result = false
+  var pos = L.bufpos
+  while true:
+    case L.buf[pos]
+    of ' ', '\t':
+      inc(pos)
+    of CR, LF:
+      result = true
+      break
+    of '#':
+      inc(pos)
+      if L.buf[pos] == '#': inc(pos)
+      if L.buf[pos] != '[': return true
+    else:
+      break
+
 proc skipMultiLineComment(L: var Lexer; tok: var Token; start: int;
                           isDoc: bool) =
   var pos = start
@@ -1073,7 +1116,9 @@ proc scanComment(L: var Lexer, tok: var Token) =
         toStrip = 0
       else:  # found first non-whitespace character
         stripInit = true
+    var lastBackslash = -1
     while L.buf[pos] notin {CR, LF, nimlexbase.EndOfFile}:
+      if L.buf[pos] == '\\': lastBackslash = pos+1
       tok.literal.add(L.buf[pos])
       inc(pos)
     tokenEndIgnore(tok, pos)
@@ -1116,7 +1161,7 @@ proc skip(L: var Lexer, tok: var Token) =
       inc(pos)
       tok.spacing.incl(tsLeading)
     of '\t':
-      lexMessagePos(L, errGenerated, pos, "tabs are not allowed, use spaces instead")
+      if not L.allowTabs: lexMessagePos(L, errGenerated, pos, "tabs are not allowed, use spaces instead")
       inc(pos)
     of CR, LF:
       tokenEndPrevious(tok, pos)
@@ -1184,7 +1229,7 @@ proc rawGetTok*(L: var Lexer, tok: var Token) =
         L.previousToken.line = tok.line.uint16
         L.previousToken.col = tok.col.int16
 
-  reset(tok)
+  fillToken(tok)
   if L.indentAhead >= 0:
     tok.indent = L.indentAhead
     L.currLineIndent = L.indentAhead
@@ -1196,7 +1241,7 @@ proc rawGetTok*(L: var Lexer, tok: var Token) =
     if tok.tokType == tkComment:
       L.indentAhead = L.currLineIndent
       return
-  let c = L.buf[L.bufpos]
+  var c = L.buf[L.bufpos]
   tok.line = L.lineNumber
   tok.col = getColNumber(L, L.bufpos)
   if c in SymStartChars - {'r', 'R'} - UnicodeOperatorStartChars:
@@ -1355,6 +1400,7 @@ proc getIndentWidth*(fileIdx: FileIndex, inputstream: PLLStream;
   result = 0
   var lex: Lexer = default(Lexer)
   var tok: Token = default(Token)
+  initToken(tok)
   openLexer(lex, fileIdx, inputstream, cache, config)
   var prevToken = tkEof
   while tok.tokType != tkEof:
@@ -1367,11 +1413,11 @@ proc getIndentWidth*(fileIdx: FileIndex, inputstream: PLLStream;
 
 proc getPrecedence*(ident: PIdent): int =
   ## assumes ident is binary operator already
-  let
-    tokType =
-      if ident.id in ord(tokKeywordLow) - ord(tkSymbol)..ord(tokKeywordHigh) - ord(tkSymbol):
-        TokType(ident.id + ord(tkSymbol))
-      else: tkOpr
-    tok = Token(ident: ident, tokType: tokType)
-
+  var tok: Token
+  initToken(tok)
+  tok.ident = ident
+  tok.tokType =
+    if tok.ident.id in ord(tokKeywordLow) - ord(tkSymbol)..ord(tokKeywordHigh) - ord(tkSymbol):
+      TokType(tok.ident.id + ord(tkSymbol))
+    else: tkOpr
   getPrecedence(tok)

compiler/liftdestructors.nim

@@ -11,9 +11,8 @@
 ## (`=sink`, `=copy`, `=destroy`, `=deepCopy`, `=wasMoved`, `=dup`).
 
 import modulegraphs, lineinfos, idents, ast, renderer, semdata,
-  sighashes, lowerings, options, types, msgs, magicsys, ccgutils
+  sighashes, lowerings, options, types, msgs, magicsys, tables, ccgutils
 
-import std/tables
 from trees import isCaseObj
 
 when defined(nimPreviewSlimSystem):
@@ -40,7 +39,7 @@ template asink*(t: PType): PSym = getAttachedOp(c.g, t, attachedSink)
 
 proc fillBody(c: var TLiftCtx; t: PType; body, x, y: PNode)
 proc produceSym(g: ModuleGraph; c: PContext; typ: PType; kind: TTypeAttachedOp;
-              info: TLineInfo; idgen: IdGenerator; isDistinct = false): PSym
+              info: TLineInfo; idgen: IdGenerator): PSym
 
 proc createTypeBoundOps*(g: ModuleGraph; c: PContext; orig: PType; info: TLineInfo;
                          idgen: IdGenerator)
@@ -56,10 +55,10 @@ proc destructorOverridden(g: ModuleGraph; t: PType): bool =
   op != nil and sfOverridden in op.flags
 
 proc fillBodyTup(c: var TLiftCtx; t: PType; body, x, y: PNode) =
-  for i, a in t.ikids:
+  for i in 0..<t.len:
     let lit = lowerings.newIntLit(c.g, x.info, i)
-    let b = if c.kind == attachedTrace: y else: y.at(lit, a)
-    fillBody(c, a, body, x.at(lit, a), b)
+    let b = if c.kind == attachedTrace: y else: y.at(lit, t[i])
+    fillBody(c, t[i], body, x.at(lit, t[i]), b)
 
 proc dotField(x: PNode, f: PSym): PNode =
   result = newNodeI(nkDotExpr, x.info, 2)
@@ -139,9 +138,9 @@ proc genContainerOf(c: var TLiftCtx; objType: PType, field, x: PSym): PNode =
   result.add minusExpr
 
 proc destructorCall(c: var TLiftCtx; op: PSym; x: PNode): PNode =
-  var destroy = newNodeIT(nkCall, x.info, op.typ.returnType)
+  var destroy = newNodeIT(nkCall, x.info, op.typ[0])
   destroy.add(newSymNode(op))
-  if op.typ.firstParamType.kind != tyVar:
+  if op.typ[1].kind != tyVar:
     destroy.add x
   else:
     destroy.add genAddr(c, x)
@@ -153,22 +152,21 @@ proc destructorCall(c: var TLiftCtx; op: PSym; x: PNode): PNode =
     result = destroy
 
 proc genWasMovedCall(c: var TLiftCtx; op: PSym; x: PNode): PNode =
-  result = newNodeIT(nkCall, x.info, op.typ.returnType)
+  result = newNodeIT(nkCall, x.info, op.typ[0])
   result.add(newSymNode(op))
   result.add genAddr(c, x)
 
-proc fillBodyObj(c: var TLiftCtx; n, body, x, y: PNode; enforceDefaultOp: bool, enforceWasMoved = false) =
+proc fillBodyObj(c: var TLiftCtx; n, body, x, y: PNode; enforceDefaultOp: bool) =
   case n.kind
   of nkSym:
     if c.filterDiscriminator != nil: return
     let f = n.sym
     let b = if c.kind == attachedTrace: y else: y.dotField(f)
-    if (sfCursor in f.flags and c.g.config.selectedGC in {gcArc, gcAtomicArc, gcOrc, gcHooks}) or
+    if (sfCursor in f.flags and f.typ.skipTypes(abstractInst).kind in {tyRef, tyProc} and
+        c.g.config.selectedGC in {gcArc, gcAtomicArc, gcOrc, gcHooks}) or
         enforceDefaultOp:
       defaultOp(c, f.typ, body, x.dotField(f), b)
     else:
-      if enforceWasMoved:
-        body.add genBuiltin(c, mWasMoved, "`=wasMoved`", x.dotField(f))
       fillBody(c, f.typ, body, x.dotField(f), b)
   of nkNilLit: discard
   of nkRecCase:
@@ -207,7 +205,7 @@ proc fillBodyObj(c: var TLiftCtx; n, body, x, y: PNode; enforceDefaultOp: bool,
       branch[^1] = newNodeI(nkStmtList, c.info)
 
       fillBodyObj(c, n[i].lastSon, branch[^1], x, y,
-                  enforceDefaultOp = localEnforceDefaultOp, enforceWasMoved = c.kind == attachedAsgn)
+                  enforceDefaultOp = localEnforceDefaultOp)
       if branch[^1].len == 0: inc emptyBranches
       caseStmt.add(branch)
     if emptyBranches != n.len-1:
@@ -218,29 +216,20 @@ proc fillBodyObj(c: var TLiftCtx; n, body, x, y: PNode; enforceDefaultOp: bool,
       fillBodyObj(c, n[0], body, x, y, enforceDefaultOp = false)
     c.filterDiscriminator = oldfilterDiscriminator
   of nkRecList:
-    for t in items(n): fillBodyObj(c, t, body, x, y, enforceDefaultOp, enforceWasMoved)
+    for t in items(n): fillBodyObj(c, t, body, x, y, enforceDefaultOp)
   else:
     illFormedAstLocal(n, c.g.config)
 
 proc fillBodyObjTImpl(c: var TLiftCtx; t: PType, body, x, y: PNode) =
-  if t.baseClass != nil:
-    let dest = newNodeIT(nkHiddenSubConv, c.info, t.baseClass)
-    dest.add newNodeI(nkEmpty, c.info)
-    dest.add x
-    var src = y
-    if c.kind in {attachedAsgn, attachedDeepCopy, attachedSink}:
-      src = newNodeIT(nkHiddenSubConv, c.info, t.baseClass)
-      src.add newNodeI(nkEmpty, c.info)
-      src.add y
-
-    fillBody(c, skipTypes(t.baseClass, abstractPtrs), body, dest, src)
+  if t.len > 0 and t[0] != nil:
+    fillBody(c, skipTypes(t[0], abstractPtrs), body, x, y)
   fillBodyObj(c, t.n, body, x, y, enforceDefaultOp = false)
 
 proc fillBodyObjT(c: var TLiftCtx; t: PType, body, x, y: PNode) =
   var hasCase = isCaseObj(t.n)
   var obj = t
-  while obj.baseClass != nil:
-    obj = skipTypes(obj.baseClass, abstractPtrs)
+  while obj.len > 0 and obj[0] != nil:
+    obj = skipTypes(obj[0], abstractPtrs)
     hasCase = hasCase or isCaseObj(obj.n)
 
   if hasCase and c.kind in {attachedAsgn, attachedDeepCopy}:
@@ -290,7 +279,6 @@ proc fillBodyObjT(c: var TLiftCtx; t: PType, body, x, y: PNode) =
     c.kind = attachedDestructor
     fillBodyObjTImpl(c, t, body, blob, y)
     c.kind = prevKind
-
   else:
     fillBodyObjTImpl(c, t, body, x, y)
 
@@ -300,7 +288,7 @@ proc boolLit*(g: ModuleGraph; info: TLineInfo; value: bool): PNode =
 
 proc getCycleParam(c: TLiftCtx): PNode =
   assert c.kind in {attachedAsgn, attachedDup}
-  if c.fn.typ.len == 3 + ord(c.kind == attachedAsgn):
+  if c.fn.typ.len == 4:
     result = c.fn.typ.n.lastSon
     assert result.kind == nkSym
     assert result.sym.name.s == "cyclic"
@@ -314,35 +302,27 @@ proc newHookCall(c: var TLiftCtx; op: PSym; x, y: PNode): PNode =
   result.add newSymNode(op)
   if sfNeverRaises notin op.flags:
     c.canRaise = true
-  if op.typ.firstParamType.kind == tyVar:
+  if op.typ[1].kind == tyVar:
     result.add genAddr(c, x)
   else:
     result.add x
   if y != nil:
     result.add y
-  if op.typ.signatureLen == 4:
+  if op.typ.len == 4:
     assert y != nil
-    if c.fn.typ.signatureLen == 4:
+    if c.fn.typ.len == 4:
       result.add getCycleParam(c)
     else:
       # assume the worst: A cycle is created:
       result.add boolLit(c.g, y.info, true)
 
 proc newOpCall(c: var TLiftCtx; op: PSym; x: PNode): PNode =
-  result = newNodeIT(nkCall, x.info, op.typ.returnType)
+  result = newNodeIT(nkCall, x.info, op.typ[0])
   result.add(newSymNode(op))
   result.add x
   if sfNeverRaises notin op.flags:
     c.canRaise = true
 
-  if c.kind == attachedDup and op.typ.len == 3:
-    assert x != nil
-    if c.fn.typ.len == 3:
-      result.add getCycleParam(c)
-    else:
-      # assume the worst: A cycle is created:
-      result.add boolLit(c.g, x.info, true)
-
 proc newDeepCopyCall(c: var TLiftCtx; op: PSym; x, y: PNode): PNode =
   result = newAsgnStmt(x, newOpCall(c, op, y))
 
@@ -565,7 +545,7 @@ proc forallElements(c: var TLiftCtx; t: PType; body, x, y: PNode) =
   let counterIdx = body.len
   let i = declareCounter(c, body, toInt64(firstOrd(c.g.config, t)))
   let whileLoop = genWhileLoop(c, i, x)
-  let elemType = t.elementType
+  let elemType = t.lastSon
   let b = if c.kind == attachedTrace: y else: y.at(i, elemType)
   fillBody(c, elemType, whileLoop[1], x.at(i, elemType), b)
   if whileLoop[1].len > 0:
@@ -574,14 +554,6 @@ proc forallElements(c: var TLiftCtx; t: PType; body, x, y: PNode) =
   else:
     body.sons.setLen counterIdx
 
-proc checkSelfAssignment(c: var TLiftCtx; t: PType; body, x, y: PNode) =
-  var cond = callCodegenProc(c.g, "sameSeqPayload", c.info,
-      newTreeIT(nkAddr, c.info, makePtrType(c.fn, x.typ, c.idgen), x),
-      newTreeIT(nkAddr, c.info, makePtrType(c.fn, y.typ, c.idgen), y)
-      )
-  cond.typ = getSysType(c.g, c.info, tyBool)
-  body.add genIf(c, cond, newTreeI(nkReturnStmt, c.info, newNodeI(nkEmpty, c.info)))
-
 proc fillSeqOp(c: var TLiftCtx; t: PType; body, x, y: PNode) =
   case c.kind
   of attachedDup:
@@ -589,13 +561,10 @@ proc fillSeqOp(c: var TLiftCtx; t: PType; body, x, y: PNode) =
     forallElements(c, t, body, x, y)
   of attachedAsgn, attachedDeepCopy:
     # we generate:
-    # if x.p == y.p:
-    #   return
     # setLen(dest, y.len)
     # var i = 0
     # while i < y.len: dest[i] = y[i]; inc(i)
     # This is usually more efficient than a destroy/create pair.
-    checkSelfAssignment(c, t, body, x, y)
     body.add setLenSeqCall(c, t, x, y)
     forallElements(c, t, body, x, y)
   of attachedSink:
@@ -676,7 +645,7 @@ proc fillStrOp(c: var TLiftCtx; t: PType; body, x, y: PNode) =
 
 proc cyclicType*(g: ModuleGraph, t: PType): bool =
   case t.kind
-  of tyRef: result = types.canFormAcycle(g, t.elementType)
+  of tyRef: result = types.canFormAcycle(g, t.lastSon)
   of tyProc: result = t.callConv == ccClosure
   else: result = false
 
@@ -701,7 +670,7 @@ proc atomicRefOp(c: var TLiftCtx; t: PType; body, x, y: PNode) =
 
   ]#
   var actions = newNodeI(nkStmtList, c.info)
-  let elemType = t.elementType
+  let elemType = t.lastSon
 
   createTypeBoundOps(c.g, c.c, elemType, c.info, c.idgen)
   let isCyclic = c.g.config.selectedGC == gcOrc and types.canFormAcycle(c.g, elemType)
@@ -871,7 +840,7 @@ proc weakrefOp(c: var TLiftCtx; t: PType; body, x, y: PNode) =
 proc ownedRefOp(c: var TLiftCtx; t: PType; body, x, y: PNode) =
   var actions = newNodeI(nkStmtList, c.info)
 
-  let elemType = t.skipModifier
+  let elemType = t.lastSon
   #fillBody(c, elemType, actions, genDeref(x), genDeref(y))
   #var disposeCall = genBuiltin(c, mDispose, "dispose", x)
 
@@ -1037,7 +1006,7 @@ proc fillBody(c: var TLiftCtx; t: PType; body, x, y: PNode) =
           fillBodyObjT(c, t, body, x, y)
   of tyDistinct:
     if not considerUserDefinedOp(c, t, body, x, y):
-      fillBody(c, t.elementType, body, x, y)
+      fillBody(c, t[0], body, x, y)
   of tyTuple:
     fillBodyTup(c, t, body, x, y)
   of tyVarargs, tyOpenArray:
@@ -1046,7 +1015,7 @@ proc fillBody(c: var TLiftCtx; t: PType; body, x, y: PNode) =
     else:
       discard "cannot copy openArray"
 
-  of tyFromExpr, tyError, tyBuiltInTypeClass, tyUserTypeClass,
+  of tyFromExpr, tyProxy, tyBuiltInTypeClass, tyUserTypeClass,
      tyUserTypeClassInst, tyCompositeTypeClass, tyAnd, tyOr, tyNot, tyAnything,
      tyGenericParam, tyGenericBody, tyNil, tyUntyped, tyTyped,
      tyTypeDesc, tyGenericInvocation, tyForward, tyStatic:
@@ -1054,18 +1023,16 @@ proc fillBody(c: var TLiftCtx; t: PType; body, x, y: PNode) =
     discard
   of tyOrdinal, tyRange, tyInferred,
      tyGenericInst, tyAlias, tySink:
-    fillBody(c, skipModifier(t), body, x, y)
+    fillBody(c, lastSon(t), body, x, y)
   of tyConcept, tyIterable: raiseAssert "unreachable"
 
 proc produceSymDistinctType(g: ModuleGraph; c: PContext; typ: PType;
                             kind: TTypeAttachedOp; info: TLineInfo;
                             idgen: IdGenerator): PSym =
   assert typ.kind == tyDistinct
-  let baseType = typ.elementType
+  let baseType = typ[0]
   if getAttachedOp(g, baseType, kind) == nil:
-    # TODO: fixme `isDistinct` is a fix for #23552; remove it after
-    # `-d:nimPreviewNonVarDestructor` becomes the default
-    discard produceSym(g, c, baseType, kind, info, idgen, isDistinct = true)
+    discard produceSym(g, c, baseType, kind, info, idgen)
   result = getAttachedOp(g, baseType, kind)
   setAttachedOp(g, idgen.module, typ, kind, result)
 
@@ -1079,7 +1046,7 @@ proc symDupPrototype(g: ModuleGraph; typ: PType; owner: PSym; kind: TTypeAttache
   res.typ = typ
   src.typ = typ
 
-  result.typ = newType(tyProc, idgen, owner)
+  result.typ = newType(tyProc, nextTypeId idgen, owner)
   result.typ.n = newNodeI(nkFormalParams, info)
   rawAddSon(result.typ, res.typ)
   result.typ.n.add newNodeI(nkEffectList, info)
@@ -1104,7 +1071,7 @@ proc symDupPrototype(g: ModuleGraph; typ: PType; owner: PSym; kind: TTypeAttache
   incl result.flags, sfGeneratedOp
 
 proc symPrototype(g: ModuleGraph; typ: PType; owner: PSym; kind: TTypeAttachedOp;
-              info: TLineInfo; idgen: IdGenerator; isDiscriminant = false; isDistinct = false): PSym =
+              info: TLineInfo; idgen: IdGenerator): PSym =
   if kind == attachedDup:
     return symDupPrototype(g, typ, owner, kind, info, idgen)
 
@@ -1114,8 +1081,7 @@ proc symPrototype(g: ModuleGraph; typ: PType; owner: PSym; kind: TTypeAttachedOp
   let src = newSym(skParam, getIdent(g.cache, if kind == attachedTrace: "env" else: "src"),
                    idgen, result, info)
 
-  if kind == attachedDestructor and g.config.selectedGC in {gcArc, gcOrc, gcAtomicArc} and
-     ((g.config.isDefined("nimPreviewNonVarDestructor") and not isDiscriminant) or (typ.kind in {tyRef, tyString, tySequence} and not isDistinct)):
+  if kind == attachedDestructor and typ.kind in {tyRef, tyString, tySequence} and g.config.selectedGC in {gcArc, gcOrc, gcAtomicArc}:
     dest.typ = typ
   else:
     dest.typ = makeVarType(typ.owner, typ, idgen)
@@ -1125,7 +1091,7 @@ proc symPrototype(g: ModuleGraph; typ: PType; owner: PSym; kind: TTypeAttachedOp
   else:
     src.typ = typ
 
-  result.typ = newProcType(info, idgen, owner)
+  result.typ = newProcType(info, nextTypeId(idgen), owner)
   result.typ.addParam dest
   if kind notin {attachedDestructor, attachedWasMoved}:
     result.typ.addParam src
@@ -1157,19 +1123,19 @@ proc genTypeFieldCopy(c: var TLiftCtx; t: PType; body, x, y: PNode) =
   body.add newAsgnStmt(xx, yy)
 
 proc produceSym(g: ModuleGraph; c: PContext; typ: PType; kind: TTypeAttachedOp;
-              info: TLineInfo; idgen: IdGenerator; isDistinct = false): PSym =
+              info: TLineInfo; idgen: IdGenerator): PSym =
   if typ.kind == tyDistinct:
     return produceSymDistinctType(g, c, typ, kind, info, idgen)
 
   result = getAttachedOp(g, typ, kind)
   if result == nil:
-    result = symPrototype(g, typ, typ.owner, kind, info, idgen, isDistinct = isDistinct)
+    result = symPrototype(g, typ, typ.owner, kind, info, idgen)
 
   var a = TLiftCtx(info: info, g: g, kind: kind, c: c, asgnForType: typ, idgen: idgen,
                    fn: result)
 
   let dest = if kind == attachedDup: result.ast[resultPos].sym else: result.typ.n[1].sym
-  let d = if result.typ.firstParamType.kind == tyVar: newDeref(newSymNode(dest)) else: newSymNode(dest)
+  let d = if result.typ[1].kind == tyVar: newDeref(newSymNode(dest)) else: newSymNode(dest)
   let src = case kind
             of {attachedDestructor, attachedWasMoved}: newNodeIT(nkSym, info, getSysType(g, info, tyPointer))
             of attachedDup: newSymNode(result.typ.n[1].sym)
@@ -1182,7 +1148,7 @@ proc produceSym(g: ModuleGraph; c: PContext; typ: PType; kind: TTypeAttachedOp;
     ## compiler can use a combination of `=destroy` and memCopy for sink op
     dest.flags.incl sfCursor
     let op = getAttachedOp(g, typ, attachedDestructor)
-    result.ast[bodyPos].add newOpCall(a, op, if op.typ.firstParamType.kind == tyVar: d[0] else: d)
+    result.ast[bodyPos].add newOpCall(a, op, if op.typ[1].kind == tyVar: d[0] else: d)
     result.ast[bodyPos].add newAsgnStmt(d, src)
   else:
     var tk: TTypeKind
@@ -1201,20 +1167,14 @@ proc produceSym(g: ModuleGraph; c: PContext; typ: PType; kind: TTypeAttachedOp;
         # bug #19205: Do not forget to also copy the hidden type field:
         genTypeFieldCopy(a, typ, result.ast[bodyPos], d, src)
 
-  if not a.canRaise:
-    incl result.flags, sfNeverRaises
-    result.ast[pragmasPos] = newNodeI(nkPragma, info)
-    result.ast[pragmasPos].add newTree(nkExprColonExpr,
-        newIdentNode(g.cache.getIdent("raises"),  info), newNodeI(nkBracket, info))
-
+  if not a.canRaise: incl result.flags, sfNeverRaises
   completePartialOp(g, idgen.module, typ, kind, result)
 
 
 proc produceDestructorForDiscriminator*(g: ModuleGraph; typ: PType; field: PSym,
                                         info: TLineInfo; idgen: IdGenerator): PSym =
   assert(typ.skipTypes({tyAlias, tyGenericInst}).kind == tyObject)
-  # discrimantor assignments needs pointers to destroy fields; alas, we cannot use non-var destructor here
-  result = symPrototype(g, field.typ, typ.owner, attachedDestructor, info, idgen, isDiscriminant = true)
+  result = symPrototype(g, field.typ, typ.owner, attachedDestructor, info, idgen)
   var a = TLiftCtx(info: info, g: g, kind: attachedDestructor, asgnForType: typ, idgen: idgen,
                    fn: result)
   a.asgnForType = typ
@@ -1266,7 +1226,7 @@ proc inst(g: ModuleGraph; c: PContext; t: PType; kind: TTypeAttachedOp; idgen: I
     else:
       localError(g.config, info, "unresolved generic parameter")
 
-proc isTrival*(s: PSym): bool {.inline.} =
+proc isTrival(s: PSym): bool {.inline.} =
   s == nil or (s.ast != nil and s.ast[bodyPos].len == 0)
 
 proc createTypeBoundOps(g: ModuleGraph; c: PContext; orig: PType; info: TLineInfo;

compiler/liftlocals.nim

@@ -10,11 +10,9 @@
 ## This module implements the '.liftLocals' pragma.
 
 import
-  options, ast, msgs,
+  strutils, options, ast, msgs,
   idents, renderer, types, lowerings, lineinfos
 
-import std/strutils
-
 from pragmas import getPragmaVal
 from wordrecg import wLiftLocals
 

compiler/lineinfos.nim

@@ -10,8 +10,7 @@
 ## This module contains the `TMsgKind` enum as well as the
 ## `TLineInfo` object.
 
-import ropes, pathutils
-import std/[hashes, tables]
+import ropes, tables, pathutils, hashes
 
 const
   explanationsBaseUrl* = "https://nim-lang.github.io/Nim"
@@ -92,10 +91,7 @@ type
     warnStmtListLambda = "StmtListLambda",
     warnBareExcept = "BareExcept",
     warnImplicitDefaultValue = "ImplicitDefaultValue",
-    warnIgnoredSymbolInjection = "IgnoredSymbolInjection",
-    warnStdPrefix = "StdPrefix"
     warnUser = "User",
-    warnGlobalVarConstructorTemporary = "GlobalVarConstructorTemporary",
     # hints
     hintSuccess = "Success", hintSuccessX = "SuccessX",
     hintCC = "CC",
@@ -108,10 +104,10 @@ type
     hintPattern = "Pattern", hintExecuting = "Exec", hintLinking = "Link", hintDependency = "Dependency",
     hintSource = "Source", hintPerformance = "Performance", hintStackTrace = "StackTrace",
     hintGCStats = "GCStats", hintGlobalVar = "GlobalVar", hintExpandMacro = "ExpandMacro",
+    hintAmbiguousEnum = "AmbiguousEnum",
     hintUser = "User", hintUserRaw = "UserRaw", hintExtendedContext = "ExtendedContext",
     hintMsgOrigin = "MsgOrigin", # since 1.3.5
     hintDeclaredLoc = "DeclaredLoc", # since 1.5.1
-    hintUnknownHint = "UnknownHint"
 
 const
   MsgKindToStr*: array[TMsgKind, string] = [
@@ -189,7 +185,7 @@ const
     warnAnyEnumConv: "$1",
     warnHoleEnumConv: "$1",
     warnCstringConv: "$1",
-    warnPtrToCstringConv: "unsafe conversion to 'cstring' from '$1'; Use a `cast` operation like `cast[cstring](x)`; this will become a compile time error in the future",
+    warnPtrToCstringConv: "unsafe conversion to 'cstring' from '$1'; this will become a compile time error in the future",
     warnEffect: "$1",
     warnCastSizes: "$1", # deadcode
     warnAboveMaxSizeSet: "$1",
@@ -198,10 +194,7 @@ const
     warnStmtListLambda: "statement list expression assumed to be anonymous proc; this is deprecated, use `do (): ...` or `proc () = ...` instead",
     warnBareExcept: "$1",
     warnImplicitDefaultValue: "$1",
-    warnIgnoredSymbolInjection: "$1",
-    warnStdPrefix: "$1 needs the 'std' prefix",
     warnUser: "$1",
-    warnGlobalVarConstructorTemporary: "global variable '$1' initialization requires a temporary variable",
     hintSuccess: "operation successful: $#",
     # keep in sync with `testament.isSuccess`
     hintSuccessX: "$build\n$loc lines; ${sec}s; $mem; proj: $project; out: $output",
@@ -232,12 +225,12 @@ const
     hintGCStats: "$1",
     hintGlobalVar: "global variable declared here",
     hintExpandMacro: "expanded macro: $1",
+    hintAmbiguousEnum: "$1",
     hintUser: "$1",
     hintUserRaw: "$1",
     hintExtendedContext: "$1",
     hintMsgOrigin: "$1",
     hintDeclaredLoc: "$1",
-    hintUnknownHint: "unknown hint: $1"
   ]
 
 const
@@ -256,7 +249,7 @@ type
 
 proc computeNotesVerbosity(): array[0..3, TNoteKinds] =
   result = default(array[0..3, TNoteKinds])
-  result[3] = {low(TNoteKind)..high(TNoteKind)} - {warnObservableStores, warnResultUsed, warnAnyEnumConv, warnBareExcept, warnStdPrefix}
+  result[3] = {low(TNoteKind)..high(TNoteKind)} - {warnObservableStores, warnResultUsed, warnAnyEnumConv, warnBareExcept}
   result[2] = result[3] - {hintStackTrace, hintExtendedContext, hintDeclaredLoc, hintProcessingStmt}
   result[1] = result[2] - {warnProveField, warnProveIndex,
     warnGcUnsafe, hintPath, hintDependency, hintCodeBegin, hintCodeEnd,

compiler/llstream.nim

@@ -19,7 +19,7 @@ when defined(nimPreviewSlimSystem):
 const hasRstdin = (defined(nimUseLinenoise) or defined(useLinenoise) or defined(useGnuReadline)) and
   not defined(windows)
 
-when hasRstdin: import std/rdstdin
+when hasRstdin: import rdstdin
 
 type
   TLLRepl* = proc (s: PLLStream, buf: pointer, bufLen: int): int
@@ -68,7 +68,6 @@ when not declared(readLineFromStdin):
   # fallback implementation:
   proc readLineFromStdin(prompt: string, line: var string): bool =
     stdout.write(prompt)
-    stdout.flushFile()
     result = readLine(stdin, line)
     if not result:
       stdout.write("\n")

compiler/lookups.nim

@@ -14,10 +14,8 @@ when defined(nimPreviewSlimSystem):
   import std/assertions
 
 import
-  ast, astalgo, idents, semdata, types, msgs, options,
-  renderer, lineinfos, modulegraphs, astmsgs, wordrecg
-
-import std/[intsets, sets]
+  intsets, ast, astalgo, idents, semdata, types, msgs, options,
+  renderer, lineinfos, modulegraphs, astmsgs, sets, wordrecg
 
 proc ensureNoMissingOrUnusedSymbols(c: PContext; scope: PScope)
 
@@ -50,7 +48,7 @@ proc considerQuotedIdent*(c: PContext; n: PNode, origin: PNode = nil): PIdent =
         case x.kind
         of nkIdent: id.add(x.ident.s)
         of nkSym: id.add(x.sym.name.s)
-        of nkSymChoices, nkOpenSym:
+        of nkSymChoices:
           if x[0].kind == nkSym:
             id.add(x[0].sym.name.s)
           else:
@@ -63,8 +61,6 @@ proc considerQuotedIdent*(c: PContext; n: PNode, origin: PNode = nil): PIdent =
       result = n[0].sym.name
     else:
       handleError(n, origin)
-  of nkOpenSym:
-    result = considerQuotedIdent(c, n[0], origin)
   else:
     handleError(n, origin)
 
@@ -139,7 +135,7 @@ proc nextIdentIter(ti: var ModuleIter; marked: var IntSet; im: ImportedModule;
         return result
 
 iterator symbols(im: ImportedModule; marked: var IntSet; name: PIdent; g: ModuleGraph): PSym =
-  var ti: ModuleIter = default(ModuleIter)
+  var ti: ModuleIter
   var candidate = initIdentIter(ti, marked, im, name, g)
   while candidate != nil:
     yield candidate
@@ -152,7 +148,7 @@ iterator importedItems*(c: PContext; name: PIdent): PSym =
       yield s
 
 proc allPureEnumFields(c: PContext; name: PIdent): seq[PSym] =
-  var ti: TIdentIter = default(TIdentIter)
+  var ti: TIdentIter
   result = @[]
   var res = initIdentIter(ti, c.pureEnumFields, name)
   while res != nil:
@@ -224,7 +220,7 @@ proc debugScopes*(c: PContext; limit=0, max = int.high) {.deprecated.} =
 proc searchInScopesAllCandidatesFilterBy*(c: PContext, s: PIdent, filter: TSymKinds): seq[PSym] =
   result = @[]
   for scope in allScopes(c.currentScope):
-    var ti: TIdentIter = default(TIdentIter)
+    var ti: TIdentIter
     var candidate = initIdentIter(ti, scope.symbols, s)
     while candidate != nil:
       if candidate.kind in filter:
@@ -242,7 +238,7 @@ proc searchInScopesFilterBy*(c: PContext, s: PIdent, filter: TSymKinds): seq[PSy
   result = @[]
   block outer:
     for scope in allScopes(c.currentScope):
-      var ti: TIdentIter = default(TIdentIter)
+      var ti: TIdentIter
       var candidate = initIdentIter(ti, scope.symbols, s)
       while candidate != nil:
         if candidate.kind in filter:
@@ -258,63 +254,8 @@ proc searchInScopesFilterBy*(c: PContext, s: PIdent, filter: TSymKinds): seq[PSy
         if s.kind in filter:
           result.add s
 
-proc cmpScopes*(ctx: PContext, s: PSym): int =
-  # Do not return a negative number
-  if s.originatingModule == ctx.module:
-    result = 2
-    var owner = s
-    while true:
-      owner = owner.skipGenericOwner
-      if owner.kind == skModule: break
-      inc result
-  else:
-    result = 1
-
-proc isAmbiguous*(c: PContext, s: PIdent, filter: TSymKinds, sym: var PSym): bool =
-  result = false
-  block outer:
-    for scope in allScopes(c.currentScope):
-      var ti: TIdentIter = default(TIdentIter)
-      var candidate = initIdentIter(ti, scope.symbols, s)
-      var scopeHasCandidate = false
-      while candidate != nil:
-        if candidate.kind in filter:
-          if scopeHasCandidate:
-            # 2 candidates in same scope, ambiguous
-            return true
-          else:
-            scopeHasCandidate = true
-            sym = candidate
-        candidate = nextIdentIter(ti, scope.symbols)
-      if scopeHasCandidate:
-        # scope had a candidate but wasn't ambiguous
-        return false
-
-  var importsHaveCandidate = false
-  var marked = initIntSet()
-  for im in c.imports.mitems:
-    for s in symbols(im, marked, s, c.graph):
-      if s.kind in filter:
-        if importsHaveCandidate:
-          # 2 candidates among imports, ambiguous
-          return true
-        else:
-          importsHaveCandidate = true
-          sym = s
-  if importsHaveCandidate:
-    # imports had a candidate but wasn't ambiguous
-    return false
-
-proc errorSym*(c: PContext, ident: PIdent, info: TLineInfo): PSym =
-  ## creates an error symbol to avoid cascading errors (for IDE support)
-  result = newSym(skError, ident, c.idgen, getCurrOwner(c), info, {})
-  result.typ = errorType(c)
-  incl(result.flags, sfDiscardable)
-  # pretend it's from the top level scope to prevent cascading errors:
-  if c.config.cmd != cmdInteractive and c.compilesContextId == 0:
-    c.moduleScope.addSym(result)
-
 proc errorSym*(c: PContext, n: PNode): PSym =
+  ## creates an error symbol to avoid cascading errors (for IDE support)
   var m = n
   # ensure that 'considerQuotedIdent' can't fail:
   if m.kind == nkDotExpr: m = m[1]
@@ -322,7 +263,12 @@ proc errorSym*(c: PContext, n: PNode): PSym =
       considerQuotedIdent(c, m)
     else:
       getIdent(c.cache, "err:" & renderTree(m))
-  result = errorSym(c, ident, n.info)
+  result = newSym(skError, ident, c.idgen, getCurrOwner(c), n.info, {})
+  result.typ = errorType(c)
+  incl(result.flags, sfDiscardable)
+  # pretend it's from the top level scope to prevent cascading errors:
+  if c.config.cmd != cmdInteractive and c.compilesContextId == 0:
+    c.moduleScope.addSym(result)
 
 type
   TOverloadIterMode* = enum
@@ -349,7 +295,7 @@ proc getSymRepr*(conf: ConfigRef; s: PSym, getDeclarationPath = true): string =
 
 proc ensureNoMissingOrUnusedSymbols(c: PContext; scope: PScope) =
   # check if all symbols have been used and defined:
-  var it: TTabIter = default(TTabIter)
+  var it: TTabIter
   var s = initTabIter(it, scope.symbols)
   var missingImpls = 0
   var unusedSyms: seq[tuple[sym: PSym, key: string]] = @[]
@@ -483,7 +429,7 @@ proc mergeShadowScope*(c: PContext) =
       c.addInterfaceDecl(sym)
 
 
-import std/[editdistance, heapqueue]
+import std/editdistance, heapqueue
 
 type SpellCandidate = object
   dist: int
@@ -504,7 +450,7 @@ proc mustFixSpelling(c: PContext): bool {.inline.} =
   result = c.config.spellSuggestMax != 0 and c.compilesContextId == 0
     # don't slowdown inside compiles()
 
-proc fixSpelling(c: PContext, ident: PIdent, result: var string) =
+proc fixSpelling(c: PContext, n: PNode, ident: PIdent, result: var string) =
   ## when we cannot find the identifier, suggest nearby spellings
   var list = initHeapQueue[SpellCandidate]()
   let name0 = ident.s.nimIdentNormalize
@@ -560,47 +506,33 @@ proc errorUseQualifier(c: PContext; info: TLineInfo; s: PSym; amb: var bool): PS
     amb = false
 
 proc errorUseQualifier*(c: PContext; info: TLineInfo; s: PSym) =
-  var amb: bool = false
+  var amb: bool
   discard errorUseQualifier(c, info, s, amb)
 
-proc ambiguousIdentifierMsg*(candidates: seq[PSym], prefix = "use one of", indent = 0): string =
-  result = ""
-  for i in 0 ..< indent:
-    result.add(' ')
-  result.add "ambiguous identifier: '" & candidates[0].name.s & "'"
+proc errorUseQualifier(c: PContext; info: TLineInfo; candidates: seq[PSym]; prefix = "use one of") =
+  var err = "ambiguous identifier: '" & candidates[0].name.s & "'"
   var i = 0
   for candidate in candidates:
-    if i == 0: result.add " -- $1 the following:\n" % prefix
-    else: result.add "\n"
-    for i in 0 ..< indent:
-      result.add(' ')
-    result.add "  " & candidate.owner.name.s & "." & candidate.name.s
-    result.add ": " & typeToString(candidate.typ)
+    if i == 0: err.add " -- $1 the following:\n" % prefix
+    else: err.add "\n"
+    err.add "  " & candidate.owner.name.s & "." & candidate.name.s
+    err.add ": " & typeToString(candidate.typ)
     inc i
+  localError(c.config, info, errGenerated, err)
 
-proc errorUseQualifier*(c: PContext; info: TLineInfo; candidates: seq[PSym]) =
-  localError(c.config, info, errGenerated, ambiguousIdentifierMsg(candidates))
-
-proc ambiguousIdentifierMsg*(choices: PNode, indent = 0): string =
+proc errorUseQualifier*(c: PContext; info:TLineInfo; choices: PNode) =
   var candidates = newSeq[PSym](choices.len)
   let prefix = if choices[0].typ.kind != tyProc: "use one of" else: "you need a helper proc to disambiguate"
   for i, n in choices:
     candidates[i] = n.sym
-  result = ambiguousIdentifierMsg(candidates, prefix, indent)
-
-proc errorUseQualifier*(c: PContext; info:TLineInfo; choices: PNode) =
-  localError(c.config, info, errGenerated, ambiguousIdentifierMsg(choices))
+  errorUseQualifier(c, info, candidates, prefix)
 
 proc errorUndeclaredIdentifier*(c: PContext; info: TLineInfo; name: string, extra = "") =
   var err: string
   if name == "_":
     err = "the special identifier '_' is ignored in declarations and cannot be used"
   else:
-    err = "undeclared identifier: '" & name & "'"
-    if "`gensym" in name:
-      err.add "; if declared in a template, this identifier may be inconsistently marked inject or gensym"
-    if extra.len != 0:
-      err.add extra
+    err = "undeclared identifier: '" & name & "'" & extra
     if c.recursiveDep.len > 0:
       err.add "\nThis might be caused by a recursive module dependency:\n"
       err.add c.recursiveDep
@@ -608,11 +540,11 @@ proc errorUndeclaredIdentifier*(c: PContext; info: TLineInfo; name: string, extr
       c.recursiveDep = ""
   localError(c.config, info, errGenerated, err)
 
-proc errorUndeclaredIdentifierHint*(c: PContext; ident: PIdent; info: TLineInfo): PSym =
+proc errorUndeclaredIdentifierHint*(c: PContext; n: PNode, ident: PIdent): PSym =
   var extra = ""
-  if c.mustFixSpelling: fixSpelling(c, ident, extra)
-  errorUndeclaredIdentifier(c, info, ident.s, extra)
-  result = errorSym(c, ident, info)
+  if c.mustFixSpelling: fixSpelling(c, n, ident, extra)
+  errorUndeclaredIdentifier(c, n.info, ident.s, extra)
+  result = errorSym(c, n)
 
 proc lookUp*(c: PContext, n: PNode): PSym =
   # Looks up a symbol. Generates an error in case of nil.
@@ -620,16 +552,16 @@ proc lookUp*(c: PContext, n: PNode): PSym =
   case n.kind
   of nkIdent:
     result = searchInScopes(c, n.ident, amb)
-    if result == nil: result = errorUndeclaredIdentifierHint(c, n.ident, n.info)
+    if result == nil: result = errorUndeclaredIdentifierHint(c, n, n.ident)
   of nkSym:
     result = n.sym
   of nkAccQuoted:
     var ident = considerQuotedIdent(c, n)
     result = searchInScopes(c, ident, amb)
-    if result == nil: result = errorUndeclaredIdentifierHint(c, ident, n.info)
+    if result == nil: result = errorUndeclaredIdentifierHint(c, n, ident)
   else:
     internalError(c.config, n.info, "lookUp")
-    return nil
+    return
   if amb:
     #contains(c.ambiguousSymbols, result.id):
     result = errorUseQualifier(c, n.info, result, amb)
@@ -640,30 +572,16 @@ type
   TLookupFlag* = enum
     checkAmbiguity, checkUndeclared, checkModule, checkPureEnumFields
 
-const allExceptModule = {low(TSymKind)..high(TSymKind)} - {skModule, skPackage}
-
-proc lookUpCandidates*(c: PContext, ident: PIdent, filter: set[TSymKind],
-                       includePureEnum = false): seq[PSym] =
-  result = searchInScopesFilterBy(c, ident, filter)
-  if skEnumField in filter and (result.len == 0 or includePureEnum):
-    result.add allPureEnumFields(c, ident)
-
 proc qualifiedLookUp*(c: PContext, n: PNode, flags: set[TLookupFlag]): PSym =
+  const allExceptModule = {low(TSymKind)..high(TSymKind)} - {skModule, skPackage}
   case n.kind
   of nkIdent, nkAccQuoted:
     var amb = false
     var ident = considerQuotedIdent(c, n)
     if checkModule in flags:
       result = searchInScopes(c, ident, amb)
-      if result == nil:
-        let candidates = allPureEnumFields(c, ident)
-        if candidates.len > 0:
-          result = candidates[0]
-          amb = candidates.len > 1
-          if amb and checkAmbiguity in flags:
-            errorUseQualifier(c, n.info, candidates)
     else:
-      let candidates = lookUpCandidates(c, ident, allExceptModule)
+      let candidates = searchInScopesFilterBy(c, ident, allExceptModule)
       if candidates.len > 0:
         result = candidates[0]
         amb = candidates.len > 1
@@ -671,47 +589,46 @@ proc qualifiedLookUp*(c: PContext, n: PNode, flags: set[TLookupFlag]): PSym =
           errorUseQualifier(c, n.info, candidates)
       else:
         result = nil
+    if result == nil:
+      let candidates = allPureEnumFields(c, ident)
+      if candidates.len > 0:
+        result = candidates[0]
+        amb = candidates.len > 1
+        if amb and checkAmbiguity in flags:
+          errorUseQualifier(c, n.info, candidates)
+
     if result == nil and checkUndeclared in flags:
-      result = errorUndeclaredIdentifierHint(c, ident, n.info)
+      result = errorUndeclaredIdentifierHint(c, n, ident)
     elif checkAmbiguity in flags and result != nil and amb:
       result = errorUseQualifier(c, n.info, result, amb)
     c.isAmbiguous = amb
   of nkSym:
     result = n.sym
-  of nkOpenSym:
-    result = qualifiedLookUp(c, n[0], flags)
   of nkDotExpr:
     result = nil
     var m = qualifiedLookUp(c, n[0], (flags * {checkUndeclared}) + {checkModule})
     if m != nil and m.kind == skModule:
       var ident: PIdent = nil
-      if n[1].kind == nkAccQuoted:
+      if n[1].kind == nkIdent:
+        ident = n[1].ident
+      elif n[1].kind == nkAccQuoted:
         ident = considerQuotedIdent(c, n[1])
-      else:
-        # this includes sym and symchoice nodes, but since we are looking in
-        # a module, it shouldn't matter what was captured
-        ident = n[1].getPIdent
       if ident != nil:
         if m == c.module:
-          var ti: TIdentIter = default(TIdentIter)
-          result = initIdentIter(ti, c.topLevelScope.symbols, ident)
-          if result != nil and nextIdentIter(ti, c.topLevelScope.symbols) != nil:
-            # another symbol exists with same name
-            c.isAmbiguous = true
+          result = strTableGet(c.topLevelScope.symbols, ident)
         else:
-          var amb: bool = false
           if c.importModuleLookup.getOrDefault(m.name.id).len > 1:
+            var amb: bool
             result = errorUseQualifier(c, n.info, m, amb)
           else:
-            result = someSymAmb(c.graph, m, ident, amb)
-            if amb: c.isAmbiguous = true
+            result = someSym(c.graph, m, ident)
         if result == nil and checkUndeclared in flags:
-          result = errorUndeclaredIdentifierHint(c, ident, n[1].info)
+          result = errorUndeclaredIdentifierHint(c, n[1], ident)
       elif n[1].kind == nkSym:
         result = n[1].sym
         if result.owner != nil and result.owner != m and checkUndeclared in flags:
           # dotExpr in templates can end up here
-          result = errorUndeclaredIdentifierHint(c, result.name, n[1].info)
+          result = errorUndeclaredIdentifierHint(c, n[1], considerQuotedIdent(c, n[1]))
       elif checkUndeclared in flags and
            n[1].kind notin {nkOpenSymChoice, nkClosedSymChoice}:
         localError(c.config, n[1].info, "identifier expected, but got: " &
@@ -723,10 +640,6 @@ proc qualifiedLookUp*(c: PContext, n: PNode, flags: set[TLookupFlag]): PSym =
     if result != nil and result.kind == skStub: loadStub(result)
 
 proc initOverloadIter*(o: var TOverloadIter, c: PContext, n: PNode): PSym =
-  if n.kind == nkOpenSym:
-    # maybe the logic in semexprs should be mirrored here instead
-    # for now it only seems this is called for `pickSym` in `getTypeIdent` 
-    return initOverloadIter(o, c, n[0])
   o.importIdx = -1
   o.marked = initIntSet()
   case n.kind

compiler/lowerings.nim

@@ -19,7 +19,7 @@ when defined(nimPreviewSlimSystem):
   import std/assertions
 
 proc newDeref*(n: PNode): PNode {.inline.} =
-  result = newNodeIT(nkHiddenDeref, n.info, n.typ.elementType)
+  result = newNodeIT(nkHiddenDeref, n.info, n.typ[0])
   result.add n
 
 proc newTupleAccess*(g: ModuleGraph; tup: PNode, i: int): PNode =
@@ -122,6 +122,25 @@ proc newTupleAccessRaw*(tup: PNode, i: int): PNode =
 proc newTryFinally*(body, final: PNode): PNode =
   result = newTree(nkHiddenTryStmt, body, newTree(nkFinally, final))
 
+proc lowerTupleUnpackingForAsgn*(g: ModuleGraph; n: PNode; idgen: IdGenerator; owner: PSym): PNode =
+  let value = n.lastSon
+  result = newNodeI(nkStmtList, n.info)
+
+  var temp = newSym(skTemp, getIdent(g.cache, "_"), idgen, owner, value.info, owner.options)
+  var v = newNodeI(nkLetSection, value.info)
+  let tempAsNode = newSymNode(temp) #newIdentNode(getIdent(genPrefix & $temp.id), value.info)
+
+  var vpart = newNodeI(nkIdentDefs, tempAsNode.info, 3)
+  vpart[0] = tempAsNode
+  vpart[1] = newNodeI(nkTupleClassTy, value.info)
+  vpart[2] = value
+  v.add vpart
+  result.add(v)
+
+  let lhs = n[0]
+  for i in 0..<lhs.len:
+    result.add newAsgnStmt(lhs[i], newTupleAccessRaw(tempAsNode, i))
+
 proc lowerSwap*(g: ModuleGraph; n: PNode; idgen: IdGenerator; owner: PSym): PNode =
   result = newNodeI(nkStmtList, n.info)
   # note: cannot use 'skTemp' here cause we really need the copy for the VM :-(
@@ -144,7 +163,7 @@ proc lowerSwap*(g: ModuleGraph; n: PNode; idgen: IdGenerator; owner: PSym): PNod
   result.add newFastAsgnStmt(n[2], tempAsNode)
 
 proc createObj*(g: ModuleGraph; idgen: IdGenerator; owner: PSym, info: TLineInfo; final=true): PType =
-  result = newType(tyObject, idgen, owner)
+  result = newType(tyObject, nextTypeId(idgen), owner)
   if final:
     rawAddSon(result, nil)
     incl result.flags, tfFinal
@@ -255,14 +274,14 @@ proc newDotExpr*(obj, b: PSym): PNode =
 proc indirectAccess*(a: PNode, b: ItemId, info: TLineInfo): PNode =
   # returns a[].b as a node
   var deref = newNodeI(nkHiddenDeref, info)
-  deref.typ = a.typ.skipTypes(abstractInst).elementType
+  deref.typ = a.typ.skipTypes(abstractInst)[0]
   var t = deref.typ.skipTypes(abstractInst)
   var field: PSym
   while true:
     assert t.kind == tyObject
     field = lookupInRecord(t.n, b)
     if field != nil: break
-    t = t.baseClass
+    t = t[0]
     if t == nil: break
     t = t.skipTypes(skipPtrs)
   #if field == nil:
@@ -278,7 +297,7 @@ proc indirectAccess*(a: PNode, b: ItemId, info: TLineInfo): PNode =
 proc indirectAccess*(a: PNode, b: string, info: TLineInfo; cache: IdentCache): PNode =
   # returns a[].b as a node
   var deref = newNodeI(nkHiddenDeref, info)
-  deref.typ = a.typ.skipTypes(abstractInst).elementType
+  deref.typ = a.typ.skipTypes(abstractInst)[0]
   var t = deref.typ.skipTypes(abstractInst)
   var field: PSym
   let bb = getIdent(cache, b)
@@ -286,7 +305,7 @@ proc indirectAccess*(a: PNode, b: string, info: TLineInfo; cache: IdentCache): P
     assert t.kind == tyObject
     field = getSymFromList(t.n, bb)
     if field != nil: break
-    t = t.baseClass
+    t = t[0]
     if t == nil: break
     t = t.skipTypes(skipPtrs)
   #if field == nil:
@@ -306,7 +325,7 @@ proc getFieldFromObj*(t: PType; v: PSym): PSym =
     assert t.kind == tyObject
     result = lookupInRecord(t.n, v.itemId)
     if result != nil: break
-    t = t.baseClass
+    t = t[0]
     if t == nil: break
     t = t.skipTypes(skipPtrs)
 
@@ -320,12 +339,12 @@ proc indirectAccess*(a, b: PSym, info: TLineInfo): PNode =
 proc genAddrOf*(n: PNode; idgen: IdGenerator; typeKind = tyPtr): PNode =
   result = newNodeI(nkAddr, n.info, 1)
   result[0] = n
-  result.typ = newType(typeKind, idgen, n.typ.owner)
+  result.typ = newType(typeKind, nextTypeId(idgen), n.typ.owner)
   result.typ.rawAddSon(n.typ)
 
 proc genDeref*(n: PNode; k = nkHiddenDeref): PNode =
   result = newNodeIT(k, n.info,
-                     n.typ.skipTypes(abstractInst).elementType)
+                     n.typ.skipTypes(abstractInst)[0])
   result.add n
 
 proc callCodegenProc*(g: ModuleGraph; name: string;
@@ -344,7 +363,7 @@ proc callCodegenProc*(g: ModuleGraph; name: string;
     if optionalArgs != nil:
       for i in 1..<optionalArgs.len-2:
         result.add optionalArgs[i]
-    result.typ = sym.typ.returnType
+    result.typ = sym.typ[0]
 
 proc newIntLit*(g: ModuleGraph; info: TLineInfo; value: BiggestInt): PNode =
   result = nkIntLit.newIntNode(value)

compiler/magicsys.nim

@@ -18,7 +18,7 @@ export createMagic
 proc nilOrSysInt*(g: ModuleGraph): PType = g.sysTypes[tyInt]
 
 proc newSysType(g: ModuleGraph; kind: TTypeKind, size: int): PType =
-  result = newType(kind, g.idgen, g.systemModule)
+  result = newType(kind, nextTypeId(g.idgen), g.systemModule)
   result.size = size
   result.align = size.int16
 
@@ -27,7 +27,7 @@ proc getSysSym*(g: ModuleGraph; info: TLineInfo; name: string): PSym =
   if result == nil:
     localError(g.config, info, "system module needs: " & name)
     result = newSym(skError, getIdent(g.cache, name), g.idgen, g.systemModule, g.systemModule.info, {})
-    result.typ = newType(tyError, g.idgen, g.systemModule)
+    result.typ = newType(tyError, nextTypeId(g.idgen), g.systemModule)
 
 proc getSysMagic*(g: ModuleGraph; info: TLineInfo; name: string, m: TMagic): PSym =
   result = nil
@@ -35,12 +35,12 @@ proc getSysMagic*(g: ModuleGraph; info: TLineInfo; name: string, m: TMagic): PSy
   for r in systemModuleSyms(g, id):
     if r.magic == m:
       # prefer the tyInt variant:
-      if r.typ.returnType != nil and r.typ.returnType.kind == tyInt: return r
+      if r.typ[0] != nil and r.typ[0].kind == tyInt: return r
       result = r
   if result != nil: return result
   localError(g.config, info, "system module needs: " & name)
   result = newSym(skError, id, g.idgen, g.systemModule, g.systemModule.info, {})
-  result.typ = newType(tyError, g.idgen, g.systemModule)
+  result.typ = newType(tyError, nextTypeId(g.idgen), g.systemModule)
 
 proc sysTypeFromName*(g: ModuleGraph; info: TLineInfo; name: string): PType =
   result = getSysSym(g, info, name).typ
@@ -93,7 +93,7 @@ proc getFloatLitType*(g: ModuleGraph; literal: PNode): PType =
 
 proc skipIntLit*(t: PType; id: IdGenerator): PType {.inline.} =
   if t.n != nil and t.kind in {tyInt, tyFloat}:
-    result = copyType(t, id, t.owner)
+    result = copyType(t, nextTypeId(id), t.owner)
     result.n = nil
   else:
     result = t
@@ -103,13 +103,6 @@ proc addSonSkipIntLit*(father, son: PType; id: IdGenerator) =
   father.add(s)
   propagateToOwner(father, s)
 
-proc makeVarType*(owner: PSym; baseType: PType; idgen: IdGenerator; kind = tyVar): PType =
-  if baseType.kind == kind:
-    result = baseType
-  else:
-    result = newType(kind, idgen, owner)
-    addSonSkipIntLit(result, baseType, idgen)
-
 proc getCompilerProc*(g: ModuleGraph; name: string): PSym =
   let ident = getIdent(g.cache, name)
   result = strTableGet(g.compilerprocs, ident)
@@ -157,13 +150,4 @@ proc getMagicEqSymForType*(g: ModuleGraph; t: PType; info: TLineInfo): PSym =
     globalError(g.config, info,
       "can't find magic equals operator for type kind " & $t.kind)
 
-proc makePtrType*(baseType: PType; idgen: IdGenerator): PType =
-  result = newType(tyPtr, idgen, baseType.owner)
-  addSonSkipIntLit(result, baseType, idgen)
 
-proc makeAddr*(n: PNode; idgen: IdGenerator): PNode =
-  if n.kind == nkHiddenAddr:
-    result = n
-  else:
-    result = newTree(nkHiddenAddr, n)
-    result.typ = makePtrType(n.typ, idgen)

compiler/main.nim

@@ -26,7 +26,8 @@ import
 when defined(nimPreviewSlimSystem):
   import std/[syncio, assertions]
 
-import ic / [cbackend, integrity, navigator, ic]
+import ic / [cbackend, integrity, navigator]
+from ic / ic import rodViewer
 
 import ../dist/checksums/src/checksums/sha1
 
@@ -150,7 +151,7 @@ proc commandCompileToC(graph: ModuleGraph) =
     extccomp.callCCompiler(conf)
     # for now we do not support writing out a .json file with the build instructions when HCR is on
     if not conf.hcrOn:
-      extccomp.writeJsonBuildInstructions(conf, graph.cachedFiles)
+      extccomp.writeJsonBuildInstructions(conf)
     if optGenScript in graph.config.globalOptions:
       writeDepsFile(graph)
     if optGenCDeps in graph.config.globalOptions:
@@ -194,8 +195,9 @@ proc commandScan(cache: IdentCache, config: ConfigRef) =
   var stream = llStreamOpen(f, fmRead)
   if stream != nil:
     var
-      L: Lexer = default(Lexer)
+      L: Lexer
       tok: Token = default(Token)
+    initToken(tok)
     openLexer(L, f, stream, cache, config)
     while true:
       rawGetTok(L, tok)
@@ -295,18 +297,14 @@ proc mainCommand*(graph: ModuleGraph) =
     # so by default should not end up in $PWD nor in $projectPath.
     var ret = if optUseNimcache in conf.globalOptions: getNimcacheDir(conf)
               else: conf.projectPath
-    if not ret.string.isAbsolute: # `AbsoluteDir` is not a real guarantee
-      rawMessage(conf, errCannotOpenFile, ret.string & "/")
+    doAssert ret.string.isAbsolute # `AbsoluteDir` is not a real guarantee
     if conf.cmd in cmdDocLike + {cmdRst2html, cmdRst2tex, cmdMd2html, cmdMd2tex}:
       ret = ret / htmldocsDir
     conf.outDir = ret
 
   ## process all commands
   case conf.cmd
-  of cmdBackends:
-    compileToBackend()
-    when BenchIC:
-      echoTimes graph.packed
+  of cmdBackends: compileToBackend()
   of cmdTcc:
     when hasTinyCBackend:
       extccomp.setCC(conf, "tcc", unknownLineInfo)
@@ -402,10 +400,6 @@ proc mainCommand*(graph: ModuleGraph) =
       for it in conf.searchPaths: msgWriteln(conf, it.string)
   of cmdCheck:
     commandCheck(graph)
-  of cmdM:
-    graph.config.symbolFiles = v2Sf
-    setUseIc(graph.config.symbolFiles != disabledSf)
-    commandCheck(graph)
   of cmdParse:
     wantMainModule(conf)
     discard parseFile(conf.projectMainIdx, cache, conf)

compiler/mangleutils.nim

@@ -1,59 +0,0 @@
-import std/strutils
-import ast, modulegraphs
-
-proc mangle*(name: string): string =
-  result = newStringOfCap(name.len)
-  var start = 0
-  if name[0] in Digits:
-    result.add("X" & name[0])
-    start = 1
-  var requiresUnderscore = false
-  template special(x) =
-    result.add x
-    requiresUnderscore = true
-  for i in start..<name.len:
-    let c = name[i]
-    case c
-    of 'a'..'z', '0'..'9', 'A'..'Z':
-      result.add(c)
-    of '_':
-      # we generate names like 'foo_9' for scope disambiguations and so
-      # disallow this here:
-      if i > 0 and i < name.len-1 and name[i+1] in Digits:
-        discard
-      else:
-        result.add(c)
-    of '$': special "dollar"
-    of '%': special "percent"
-    of '&': special "amp"
-    of '^': special "roof"
-    of '!': special "emark"
-    of '?': special "qmark"
-    of '*': special "star"
-    of '+': special "plus"
-    of '-': special "minus"
-    of '/': special "slash"
-    of '\\': special "backslash"
-    of '=': special "eq"
-    of '<': special "lt"
-    of '>': special "gt"
-    of '~': special "tilde"
-    of ':': special "colon"
-    of '.': special "dot"
-    of '@': special "at"
-    of '|': special "bar"
-    else:
-      result.add("X" & toHex(ord(c), 2))
-      requiresUnderscore = true
-  if requiresUnderscore:
-    result.add "_"
-
-proc mangleParamExt*(s: PSym): string =
-  result = "_p"
-  result.addInt s.position
-
-proc mangleProcNameExt*(graph: ModuleGraph, s: PSym): string =
-  result = "__"
-  result.add graph.ifaces[s.itemId.module].uniqueName
-  result.add "_u"
-  result.addInt s.itemId.item # s.disamb #

compiler/modulegraphs.nim

@@ -11,12 +11,11 @@
 ## represents a complete Nim project. Single modules can either be kept in RAM
 ## or stored in a rod-file.
 
-import std/[intsets, tables, hashes, strtabs, algorithm, os, strutils, parseutils]
+import intsets, tables, hashes
 import ../dist/checksums/src/checksums/md5
-import ast, astalgo, options, lineinfos,idents, btrees, ropes, msgs, pathutils, packages, suggestsymdb
+import ast, astalgo, options, lineinfos,idents, btrees, ropes, msgs, pathutils, packages
 import ic / [packed_ast, ic]
 
-
 when defined(nimPreviewSlimSystem):
   import std/assertions
 
@@ -55,6 +54,10 @@ type
     concreteTypes*: seq[FullId]
     inst*: PInstantiation
 
+  SymInfoPair* = object
+    sym*: PSym
+    info*: TLineInfo
+
   PipelinePass* = enum
     NonePass
     SemPass
@@ -75,9 +78,8 @@ type
     typeInstCache*: Table[ItemId, seq[LazyType]] # A symbol's ItemId.
     procInstCache*: Table[ItemId, seq[LazyInstantiation]] # A symbol's ItemId.
     attachedOps*: array[TTypeAttachedOp, Table[ItemId, LazySym]] # Type ID, destructors, etc.
-    methodsPerGenericType*: Table[ItemId, seq[(int, LazySym)]] # Type ID, attached methods
-    memberProcsPerType*: Table[ItemId, seq[PSym]] # Type ID, attached member procs (only c++, virtual,member and ctor so far).
-    initializersPerType*: Table[ItemId, PNode] # Type ID, AST call to the default ctor (c++ only)
+    methodsPerType*: Table[ItemId, seq[(int, LazySym)]] # Type ID, attached methods
+    memberProcsPerType*: Table[ItemId, seq[PSym]] # Type ID, attached member procs (only c++, virtual and ctor so far)
     enumToStringProcs*: Table[ItemId, LazySym]
     emittedTypeInfo*: Table[string, FileIndex]
 
@@ -87,7 +89,6 @@ type
     importDeps*: Table[FileIndex, seq[FileIndex]] # explicit import module dependencies
     suggestMode*: bool # whether we are in nimsuggest mode or not.
     invalidTransitiveClosure: bool
-    interactive*: bool
     inclToMod*: Table[FileIndex, FileIndex] # mapping of include file to the
                                             # first module that included it
     importStack*: seq[FileIndex]  # The current import stack. Used for detecting recursive
@@ -97,18 +98,12 @@ type
     cache*: IdentCache
     vm*: RootRef # unfortunately the 'vm' state is shared project-wise, this will
                  # be clarified in later compiler implementations.
-    repl*: RootRef # REPL state is shared project-wise.
     doStopCompile*: proc(): bool {.closure.}
     usageSym*: PSym # for nimsuggest
     owners*: seq[PSym]
-    suggestSymbols*: SuggestSymbolDatabase
+    suggestSymbols*: Table[FileIndex, seq[SymInfoPair]]
     suggestErrors*: Table[FileIndex, seq[Suggest]]
     methods*: seq[tuple[methods: seq[PSym], dispatcher: PSym]] # needs serialization!
-    bucketTable*: CountTable[ItemId]
-    objectTree*: Table[ItemId, seq[tuple[depth: int, value: PType]]]
-    methodsPerType*: Table[ItemId, seq[LazySym]]
-    dispatchers*: seq[LazySym]
-
     systemModule*: PSym
     sysTypes*: array[TTypeKind, PType]
     compilerprocs*: TStrTable
@@ -133,8 +128,6 @@ type
     idgen*: IdGenerator
     operators*: Operators
 
-    cachedFiles*: StringTableRef
-
   TPassContext* = object of RootObj # the pass's context
     idgen*: IdGenerator
   PPassContext* = ref TPassContext
@@ -154,10 +147,8 @@ proc resetForBackend*(g: ModuleGraph) =
   g.procInstCache.clear()
   for a in mitems(g.attachedOps):
     a.clear()
-  g.methodsPerGenericType.clear()
-  g.enumToStringProcs.clear()
-  g.dispatchers.setLen(0)
   g.methodsPerType.clear()
+  g.enumToStringProcs.clear()
 
 const
   cb64 = [
@@ -215,10 +206,10 @@ proc strTableAdds*(g: ModuleGraph, m: PSym, s: PSym) =
 proc isCachedModule(g: ModuleGraph; module: int): bool {.inline.} =
   result = module < g.packed.len and g.packed[module].status == loaded
 
-proc isCachedModule*(g: ModuleGraph; m: PSym): bool {.inline.} =
+proc isCachedModule(g: ModuleGraph; m: PSym): bool {.inline.} =
   isCachedModule(g, m.position)
 
-proc simulateCachedModule(g: ModuleGraph; moduleSym: PSym; m: PackedModule) =
+proc simulateCachedModule*(g: ModuleGraph; moduleSym: PSym; m: PackedModule) =
   when false:
     echo "simulating ", moduleSym.name.s, " ", moduleSym.position
   simulateLoadedModule(g.packed, g.config, g.cache, moduleSym, m)
@@ -257,7 +248,7 @@ proc nextModuleIter*(mi: var ModuleIter; g: ModuleGraph): PSym =
 iterator allSyms*(g: ModuleGraph; m: PSym): PSym =
   let importHidden = optImportHidden in m.options
   if isCachedModule(g, m):
-    var rodIt: RodIter = default(RodIter)
+    var rodIt: RodIter
     var r = initRodIterAllSyms(rodIt, g.config, g.cache, g.packed, FileIndex m.position, importHidden)
     while r != nil:
       yield r
@@ -274,30 +265,11 @@ proc someSym*(g: ModuleGraph; m: PSym; name: PIdent): PSym =
   else:
     result = strTableGet(g.ifaces[m.position].interfSelect(importHidden), name)
 
-proc someSymAmb*(g: ModuleGraph; m: PSym; name: PIdent; amb: var bool): PSym =
-  let importHidden = optImportHidden in m.options
-  if isCachedModule(g, m):
-    result = nil
-    for s in interfaceSymbols(g.config, g.cache, g.packed, FileIndex(m.position), name, importHidden):
-      if result == nil:
-        # set result to the first symbol
-        result = s
-      else:
-        # another symbol found
-        amb = true
-        break
-  else:
-    var ti: TIdentIter = default(TIdentIter)
-    result = initIdentIter(ti, g.ifaces[m.position].interfSelect(importHidden), name)
-    if result != nil and nextIdentIter(ti, g.ifaces[m.position].interfSelect(importHidden)) != nil:
-      # another symbol exists with same name
-      amb = true
-
 proc systemModuleSym*(g: ModuleGraph; name: PIdent): PSym =
   result = someSym(g, g.systemModule, name)
 
 iterator systemModuleSyms*(g: ModuleGraph; name: PIdent): PSym =
-  var mi: ModuleIter = default(ModuleIter)
+  var mi: ModuleIter
   var r = initModuleIter(mi, g, g.systemModule, name)
   while r != nil:
     yield r
@@ -328,7 +300,7 @@ proc resolveInst(g: ModuleGraph; t: var LazyInstantiation): PInstantiation =
     t.inst = result
   assert result != nil
 
-proc resolveAttachedOp*(g: ModuleGraph; t: var LazySym): PSym =
+proc resolveAttachedOp(g: ModuleGraph; t: var LazySym): PSym =
   result = t.sym
   if result == nil:
     result = loadSymFromId(g.config, g.cache, g.packed, t.id.module, t.id.packed)
@@ -347,7 +319,6 @@ iterator procInstCacheItems*(g: ModuleGraph; s: PSym): PInstantiation =
     for t in mitems(x[]):
       yield resolveInst(g, t)
 
-
 proc getAttachedOp*(g: ModuleGraph; t: PType; op: TTypeAttachedOp): PSym =
   ## returns the requested attached operation for type `t`. Can return nil
   ## if no such operation exists.
@@ -371,27 +342,6 @@ proc completePartialOp*(g: ModuleGraph; module: int; t: PType; op: TTypeAttached
     toPackedGeneratedProcDef(value, g.encoders[module], g.packed[module].fromDisk)
     #storeAttachedProcDef(t, op, value, g.encoders[module], g.packed[module].fromDisk)
 
-iterator getDispatchers*(g: ModuleGraph): PSym =
-  for i in g.dispatchers.mitems:
-    yield resolveSym(g, i)
-
-proc addDispatchers*(g: ModuleGraph, value: PSym) =
-  # TODO: add it for packed modules
-  g.dispatchers.add LazySym(sym: value)
-
-iterator resolveLazySymSeq(g: ModuleGraph, list: var seq[LazySym]): PSym =
-  for it in list.mitems:
-    yield resolveSym(g, it)
-
-proc setMethodsPerType*(g: ModuleGraph; id: ItemId, methods: seq[LazySym]) =
-  # TODO: add it for packed modules
-  g.methodsPerType[id] = methods
-
-iterator getMethodsPerType*(g: ModuleGraph; t: PType): PSym =
-  if g.methodsPerType.contains(t.itemId):
-    for it in mitems g.methodsPerType[t.itemId]:
-      yield resolveSym(g, it)
-
 proc getToStringProc*(g: ModuleGraph; t: PType): PSym =
   result = resolveSym(g, g.enumToStringProcs[t.itemId])
   assert result != nil
@@ -400,12 +350,12 @@ proc setToStringProc*(g: ModuleGraph; t: PType; value: PSym) =
   g.enumToStringProcs[t.itemId] = LazySym(sym: value)
 
 iterator methodsForGeneric*(g: ModuleGraph; t: PType): (int, PSym) =
-  if g.methodsPerGenericType.contains(t.itemId):
-    for it in mitems g.methodsPerGenericType[t.itemId]:
+  if g.methodsPerType.contains(t.itemId):
+    for it in mitems g.methodsPerType[t.itemId]:
       yield (it[0], resolveSym(g, it[1]))
 
 proc addMethodToGeneric*(g: ModuleGraph; module: int; t: PType; col: int; m: PSym) =
-  g.methodsPerGenericType.mgetOrPut(t.itemId, @[]).add (col, LazySym(sym: m))
+  g.methodsPerType.mgetOrPut(t.itemId, @[]).add (col, LazySym(sym: m))
 
 proc hasDisabledAsgn*(g: ModuleGraph; t: PType): bool =
   let op = getAttachedOp(g, t, attachedAsgn)
@@ -422,7 +372,7 @@ proc loadCompilerProc*(g: ModuleGraph; name: string): PSym =
   if g.config.symbolFiles == disabledSf: return nil
 
   # slow, linear search, but the results are cached:
-  for module in 0..<len(g.packed):
+  for module in 0..high(g.packed):
     #if isCachedModule(g, module):
     let x = searchForCompilerproc(g.packed[module], name)
     if x >= 0:
@@ -471,49 +421,6 @@ proc createMagic*(g: ModuleGraph; idgen: IdGenerator; name: string, m: TMagic):
 proc createMagic(g: ModuleGraph; name: string, m: TMagic): PSym =
   result = createMagic(g, g.idgen, name, m)
 
-proc uniqueModuleName*(conf: ConfigRef; m: PSym): string =
-  ## The unique module name is guaranteed to only contain {'A'..'Z', 'a'..'z', '0'..'9', '_'}
-  ## so that it is useful as a C identifier snippet.
-  let fid = FileIndex(m.position)
-  let path = AbsoluteFile toFullPath(conf, fid)
-  var isLib = false
-  var rel = ""
-  if path.string.startsWith(conf.libpath.string):
-    isLib = true
-    rel = relativeTo(path, conf.libpath).string
-  else:
-    rel = relativeTo(path, conf.projectPath).string
-
-  if not isLib and not belongsToProjectPackage(conf, m):
-    # special handlings for nimble packages
-    when DirSep == '\\':
-      let rel2 = replace(rel, '\\', '/')
-    else:
-      let rel2 = rel
-    const pkgs2 = "pkgs2/"
-    var start = rel2.find(pkgs2)
-    if start >= 0:
-      start += pkgs2.len
-      start += skipUntil(rel2, {'/'}, start)
-      if start+1 < rel2.len:
-        rel = "pkg/" & rel2[start+1..<rel.len] # strips paths
-
-  let trunc = if rel.endsWith(".nim"): rel.len - len(".nim") else: rel.len
-  result = newStringOfCap(trunc)
-  for i in 0..<trunc:
-    let c = rel[i]
-    case c
-    of 'a'..'z', '0'..'9':
-      result.add c
-    of {os.DirSep, os.AltSep}:
-      result.add 'Z' # because it looks a bit like '/'
-    of '.':
-      result.add 'O' # a circle
-    else:
-      # We mangle upper letters too so that there cannot
-      # be clashes with our special meanings of 'Z' and 'O'
-      result.addInt ord(c)
-
 proc registerModule*(g: ModuleGraph; m: PSym) =
   assert m != nil
   assert m.kind == skModule
@@ -522,10 +429,10 @@ proc registerModule*(g: ModuleGraph; m: PSym) =
     setLen(g.ifaces, m.position + 1)
 
   if m.position >= g.packed.len:
-    setLen(g.packed.pm, m.position + 1)
+    setLen(g.packed, m.position + 1)
 
   g.ifaces[m.position] = Iface(module: m, converters: @[], patterns: @[],
-                               uniqueName: rope(uniqueModuleName(g.config, m)))
+                               uniqueName: rope(uniqueModuleName(g.config, FileIndex(m.position))))
   initStrTables(g, m)
 
 proc registerModuleById*(g: ModuleGraph; m: FileIndex) =
@@ -534,21 +441,19 @@ proc registerModuleById*(g: ModuleGraph; m: FileIndex) =
 proc initOperators*(g: ModuleGraph): Operators =
   # These are safe for IC.
   # Public because it's used by DrNim.
-  result = Operators(
-    opLe: createMagic(g, "<=", mLeI),
-    opLt: createMagic(g, "<", mLtI),
-    opAnd: createMagic(g, "and", mAnd),
-    opOr: createMagic(g, "or", mOr),
-    opIsNil: createMagic(g, "isnil", mIsNil),
-    opEq: createMagic(g, "==", mEqI),
-    opAdd: createMagic(g, "+", mAddI),
-    opSub: createMagic(g, "-", mSubI),
-    opMul: createMagic(g, "*", mMulI),
-    opDiv: createMagic(g, "div", mDivI),
-    opLen: createMagic(g, "len", mLengthSeq),
-    opNot: createMagic(g, "not", mNot),
-    opContains: createMagic(g, "contains", mInSet)
-  )
+  result.opLe = createMagic(g, "<=", mLeI)
+  result.opLt = createMagic(g, "<", mLtI)
+  result.opAnd = createMagic(g, "and", mAnd)
+  result.opOr = createMagic(g, "or", mOr)
+  result.opIsNil = createMagic(g, "isnil", mIsNil)
+  result.opEq = createMagic(g, "==", mEqI)
+  result.opAdd = createMagic(g, "+", mAddI)
+  result.opSub = createMagic(g, "-", mSubI)
+  result.opMul = createMagic(g, "*", mMulI)
+  result.opDiv = createMagic(g, "div", mDivI)
+  result.opLen = createMagic(g, "len", mLengthSeq)
+  result.opNot = createMagic(g, "not", mNot)
+  result.opContains = createMagic(g, "contains", mInSet)
 
 proc initModuleGraphFields(result: ModuleGraph) =
   # A module ID of -1 means that the symbol is not attached to a module at all,
@@ -561,7 +466,7 @@ proc initModuleGraphFields(result: ModuleGraph) =
   result.importStack = @[]
   result.inclToMod = initTable[FileIndex, FileIndex]()
   result.owners = @[]
-  result.suggestSymbols = initTable[FileIndex, SuggestFileSymbolDatabase]()
+  result.suggestSymbols = initTable[FileIndex, seq[SymInfoPair]]()
   result.suggestErrors = initTable[FileIndex, seq[Suggest]]()
   result.methods = @[]
   result.compilerprocs = initStrTable()
@@ -575,7 +480,6 @@ proc initModuleGraphFields(result: ModuleGraph) =
   result.symBodyHashes = initTable[int, SigHash]()
   result.operators = initOperators(result)
   result.emittedTypeInfo = initTable[string, FileIndex]()
-  result.cachedFiles = newStringTable()
 
 proc newModuleGraph*(cache: IdentCache; config: ConfigRef): ModuleGraph =
   result = ModuleGraph()
@@ -739,6 +643,8 @@ proc moduleFromRodFile*(g: ModuleGraph; fileIdx: FileIndex;
 proc configComplete*(g: ModuleGraph) =
   rememberStartupConfig(g.startupPackedConfig, g.config)
 
+from std/strutils import repeat, `%`
+
 proc onProcessing*(graph: ModuleGraph, fileIdx: FileIndex, moduleStatus: string, fromModule: PSym, ) =
   let conf = graph.config
   let isNimscript = conf.isDefined("nimscript")
@@ -764,14 +670,16 @@ func belongsToStdlib*(graph: ModuleGraph, sym: PSym): bool =
   ## Check if symbol belongs to the 'stdlib' package.
   sym.getPackageSymbol.getPackageId == graph.systemModule.getPackageId
 
-proc fileSymbols*(graph: ModuleGraph, fileIdx: FileIndex): SuggestFileSymbolDatabase =
-  result = graph.suggestSymbols.getOrDefault(fileIdx, newSuggestFileSymbolDatabase(fileIdx, optIdeExceptionInlayHints in graph.config.globalOptions))
-  doAssert(result.fileIndex == fileIdx)
+proc `==`*(a, b: SymInfoPair): bool =
+  result = a.sym == b.sym and a.info.exactEquals(b.info)
+
+proc fileSymbols*(graph: ModuleGraph, fileIdx: FileIndex): seq[SymInfoPair] =
+  result = graph.suggestSymbols.getOrDefault(fileIdx, @[])
 
 iterator suggestSymbolsIter*(g: ModuleGraph): SymInfoPair =
   for xs in g.suggestSymbols.values:
-    for i in xs.lineInfo.low..xs.lineInfo.high:
-      yield xs.getSymInfoPair(i)
+    for x in xs:
+      yield x
 
 iterator suggestErrorsIter*(g: ModuleGraph): Suggest =
   for xs in g.suggestErrors.values:

compiler/modulepaths.nim

@@ -7,11 +7,9 @@
 #    distribution, for details about the copyright.
 #
 
-import ast, renderer, msgs, options, idents, lineinfos,
+import ast, renderer, strutils, msgs, options, idents, os, lineinfos,
   pathutils
 
-import std/[strutils, os]
-
 proc getModuleName*(conf: ConfigRef; n: PNode): string =
   # This returns a short relative module name without the nim extension
   # e.g. like "system", "importer" or "somepath/module"
@@ -38,18 +36,11 @@ proc getModuleName*(conf: ConfigRef; n: PNode): string =
           localError(n.info, "only '/' supported with $package notation")
           result = ""
     else:
-      if n0.kind in nkIdentKinds:
-        let ident = n0.getPIdent
-        if ident != nil and ident.s[0] == '/':
-          let modname = getModuleName(conf, n[2])
-          # hacky way to implement 'x / y /../ z':
-          result = getModuleName(conf, n1)
-          result.add renderTree(n0, {renderNoComments}).replace(" ")
-          result.add modname
-        else:
-          result = ""
-      else:
-        result = ""
+      let modname = getModuleName(conf, n[2])
+      # hacky way to implement 'x / y /../ z':
+      result = getModuleName(conf, n1)
+      result.add renderTree(n0, {renderNoComments}).replace(" ")
+      result.add modname
   of nkPrefix:
     when false:
       if n[0].kind == nkIdent and n[0].ident.s == "$":

compiler/modules.nim

@@ -14,9 +14,6 @@ import
   idents, lexer, syntaxes, modulegraphs,
   lineinfos, pathutils
 
-import ../dist/checksums/src/checksums/sha1
-import std/strtabs
-
 proc resetSystemArtifacts*(g: ModuleGraph) =
   magicsys.resetSysTypes(g)
 
@@ -45,8 +42,6 @@ proc includeModule*(graph: ModuleGraph; s: PSym, fileIdx: FileIndex): PNode =
   result = syntaxes.parseFile(fileIdx, graph.cache, graph.config)
   graph.addDep(s, fileIdx)
   graph.addIncludeDep(s.position.FileIndex, fileIdx)
-  let path = toFullPath(graph.config, fileIdx)
-  graph.cachedFiles[path] = $secureHashFile(path)
 
 proc wantMainModule*(conf: ConfigRef) =
   if conf.projectFull.isEmpty:

compiler/msgs.nim

@@ -61,12 +61,14 @@ proc makeCString*(s: string): Rope =
   result.add('\"')
 
 proc newFileInfo(fullPath: AbsoluteFile, projPath: RelativeFile): TFileInfo =
-  result = TFileInfo(fullPath: fullPath, projPath: projPath,
-                    shortName: fullPath.extractFilename,
-                    quotedFullName: fullPath.string.makeCString,
-                    lines: @[]
-  )
+  result.fullPath = fullPath
+  #shallow(result.fullPath)
+  result.projPath = projPath
+  #shallow(result.projPath)
+  result.shortName = fullPath.extractFilename
   result.quotedName = result.shortName.makeCString
+  result.quotedFullName = fullPath.string.makeCString
+  result.lines = @[]
   when defined(nimpretty):
     if not result.fullPath.isEmpty:
       try:
@@ -123,18 +125,18 @@ proc fileInfoIdx*(conf: ConfigRef; filename: AbsoluteFile; isKnownFile: var bool
     conf.m.filenameToIndexTbl[canon2] = result
 
 proc fileInfoIdx*(conf: ConfigRef; filename: AbsoluteFile): FileIndex =
-  var dummy: bool = false
+  var dummy: bool
   result = fileInfoIdx(conf, filename, dummy)
 
 proc fileInfoIdx*(conf: ConfigRef; filename: RelativeFile; isKnownFile: var bool): FileIndex =
   fileInfoIdx(conf, AbsoluteFile expandFilename(filename.string), isKnownFile)
 
 proc fileInfoIdx*(conf: ConfigRef; filename: RelativeFile): FileIndex =
-  var dummy: bool = false
+  var dummy: bool
   fileInfoIdx(conf, AbsoluteFile expandFilename(filename.string), dummy)
 
 proc newLineInfo*(fileInfoIdx: FileIndex, line, col: int): TLineInfo =
-  result = TLineInfo(fileIndex: fileInfoIdx)
+  result.fileIndex = fileInfoIdx
   if line < int high(uint16):
     result.line = uint16(line)
   else:
@@ -429,8 +431,7 @@ To create a stacktrace, rerun compilation with './koch temp $1 <file>', see $2 f
 proc handleError(conf: ConfigRef; msg: TMsgKind, eh: TErrorHandling, s: string, ignoreMsg: bool) =
   if msg in fatalMsgs:
     if conf.cmd == cmdIdeTools: log(s)
-    if conf.cmd != cmdIdeTools or msg != errFatal:
-      quit(conf, msg)
+    quit(conf, msg)
   if msg >= errMin and msg <= errMax or
       (msg in warnMin..hintMax and msg in conf.warningAsErrors and not ignoreMsg):
     inc(conf.errorCounter)
@@ -438,11 +439,7 @@ proc handleError(conf: ConfigRef; msg: TMsgKind, eh: TErrorHandling, s: string,
     if conf.errorCounter >= conf.errorMax:
       # only really quit when we're not in the new 'nim check --def' mode:
       if conf.ideCmd == ideNone:
-        when defined(nimsuggest):
-          #we need to inform the user that something went wrong when initializing NimSuggest
-          raiseRecoverableError(s)
-        else:
-          quit(conf, msg)
+        quit(conf, msg)
     elif eh == doAbort and conf.cmd != cmdIdeTools:
       quit(conf, msg)
     elif eh == doRaise:
@@ -560,10 +557,9 @@ proc liMessage*(conf: ConfigRef; info: TLineInfo, msg: TMsgKind, arg: string,
     ignoreMsg = not conf.hasHint(msg)
     if not ignoreMsg and msg in conf.warningAsErrors:
       title = ErrorTitle
-      color = ErrorColor
     else:
       title = HintTitle
-      color = HintColor
+    color = HintColor
     inc(conf.hintCounter)
 
   let s = if isRaw: arg else: getMessageStr(msg, arg)
@@ -629,7 +625,7 @@ proc warningDeprecated*(conf: ConfigRef, info: TLineInfo = gCmdLineInfo, msg = "
   message(conf, info, warnDeprecated, msg)
 
 proc internalErrorImpl(conf: ConfigRef; info: TLineInfo, errMsg: string, info2: InstantiationInfo) =
-  if conf.cmd in {cmdIdeTools, cmdCheck} and conf.structuredErrorHook.isNil: return
+  if conf.cmd == cmdIdeTools and conf.structuredErrorHook.isNil: return
   writeContext(conf, info)
   liMessage(conf, info, errInternal, errMsg, doAbort, info2)
 
@@ -651,16 +647,13 @@ template lintReport*(conf: ConfigRef; info: TLineInfo, beau, got: string, extraM
   let msg = if optStyleError in conf.globalOptions: errGenerated else: hintName
   liMessage(conf, info, msg, m, doNothing, instLoc())
 
-proc quotedFilename*(conf: ConfigRef; fi: FileIndex): Rope =
-  if fi.int32 < 0:
+proc quotedFilename*(conf: ConfigRef; i: TLineInfo): Rope =
+  if i.fileIndex.int32 < 0:
     result = makeCString "???"
   elif optExcessiveStackTrace in conf.globalOptions:
-    result = conf.m.fileInfos[fi.int32].quotedFullName
+    result = conf.m.fileInfos[i.fileIndex.int32].quotedFullName
   else:
-    result = conf.m.fileInfos[fi.int32].quotedName
-
-proc quotedFilename*(conf: ConfigRef; i: TLineInfo): Rope =
-  quotedFilename(conf, i.fileIndex)
+    result = conf.m.fileInfos[i.fileIndex.int32].quotedName
 
 template listMsg(title, r) =
   msgWriteln(conf, title, {msgNoUnitSep})
@@ -669,6 +662,31 @@ template listMsg(title, r) =
 proc listWarnings*(conf: ConfigRef) = listMsg("Warnings:", warnMin..warnMax)
 proc listHints*(conf: ConfigRef) = listMsg("Hints:", hintMin..hintMax)
 
+proc uniqueModuleName*(conf: ConfigRef; fid: FileIndex): string =
+  ## The unique module name is guaranteed to only contain {'A'..'Z', 'a'..'z', '0'..'9', '_'}
+  ## so that it is useful as a C identifier snippet.
+  let path = AbsoluteFile toFullPath(conf, fid)
+  let rel =
+    if path.string.startsWith(conf.libpath.string):
+      relativeTo(path, conf.libpath).string
+    else:
+      relativeTo(path, conf.projectPath).string
+  let trunc = if rel.endsWith(".nim"): rel.len - len(".nim") else: rel.len
+  result = newStringOfCap(trunc)
+  for i in 0..<trunc:
+    let c = rel[i]
+    case c
+    of 'a'..'z':
+      result.add c
+    of {os.DirSep, os.AltSep}:
+      result.add 'Z' # because it looks a bit like '/'
+    of '.':
+      result.add 'O' # a circle
+    else:
+      # We mangle upper letters and digits too so that there cannot
+      # be clashes with our special meanings of 'Z' and 'O'
+      result.addInt ord(c)
+
 proc genSuccessX*(conf: ConfigRef) =
   let mem =
     when declared(system.getMaxMem): formatSize(getMaxMem()) & " peakmem"
@@ -707,8 +725,6 @@ proc genSuccessX*(conf: ConfigRef) =
   elif conf.outFile.isEmpty and conf.cmd notin {cmdJsonscript} + cmdDocLike + cmdBackends:
     # for some cmd we expect a valid absOutFile
     output = "unknownOutput"
-  elif optStdout in conf.globalOptions:
-    output = "stdout"
   else:
     output = $conf.absOutFile
   if conf.filenameOption != foAbs: output = output.AbsoluteFile.extractFilename

compiler/ndi.nim

@@ -29,7 +29,7 @@ proc doWrite(f: var NdiFile; s: PSym; conf: ConfigRef) =
   f.buf.add "\t"
   f.buf.addInt s.info.col.int
   f.f.write(s.name.s, "\t")
-  f.f.writeRope(s.loc.snippet)
+  f.f.writeRope(s.loc.r)
   f.f.writeLine("\t", toFullPath(conf, s.info), "\t", f.buf)
 
 template writeMangledName*(f: NdiFile; s: PSym; conf: ConfigRef) =

compiler/nilcheck.nim

@@ -7,8 +7,8 @@
 #    distribution, for details about the copyright.
 #
 
-import ast, renderer, msgs, options, lineinfos, idents, treetab
-import std/[intsets, tables, sequtils, strutils, sets, strformat, hashes]
+import ast, renderer, intsets, tables, msgs, options, lineinfos, strformat, idents, treetab, hashes
+import sequtils, strutils, sets
 
 when defined(nimPreviewSlimSystem):
   import std/assertions
@@ -498,7 +498,7 @@ proc checkCall(n, ctx, map): Check =
   # check args and handle possible mutations
 
   var isNew = false
-  result = Check(map: map)
+  result.map = map
   for i, child in n:
     discard check(child, ctx, map)
 
@@ -507,7 +507,7 @@ proc checkCall(n, ctx, map): Check =
       # as it might have been mutated
       # TODO similar for normal refs and fields: find dependent exprs: brackets
 
-      if child.kind == nkHiddenAddr and not child.typ.isNil and child.typ.kind == tyVar and child.typ.elementType.kind == tyRef:
+      if child.kind == nkHiddenAddr and not child.typ.isNil and child.typ.kind == tyVar and child.typ[0].kind == tyRef:
         if not isNew:
           result.map = newNilMap(map)
           isNew = true
@@ -753,7 +753,6 @@ proc checkReturn(n, ctx, map): Check =
 
 proc checkIf(n, ctx, map): Check =
   ## check branches based on condition
-  result = default(Check)
   var mapIf: NilMap = map
 
   # first visit the condition
@@ -826,7 +825,7 @@ proc checkFor(n, ctx, map): Check =
   var check2 = check(n.sons[2], ctx, m)
   var map2 = check2.map
 
-  result = Check(map: ctx.union(map0, m))
+  result.map = ctx.union(map0, m)
   result.map = ctx.union(result.map, map2)
   result.nilability = Safe
 
@@ -854,7 +853,7 @@ proc checkWhile(n, ctx, map): Check =
   var check2 = check(n.sons[1], ctx, m)
   var map2 = check2.map
 
-  result = Check(map: ctx.union(map0, map1))
+  result.map = ctx.union(map0, map1)
   result.map = ctx.union(result.map, map2)
   result.nilability = Safe
 
@@ -900,7 +899,7 @@ proc checkInfix(n, ctx, map): Check =
 proc checkIsNil(n, ctx, map; isElse: bool = false): Check =
   ## check isNil calls
   ## update the map depending on if it is not isNil or isNil
-  result = Check(map: newNilMap(map))
+  result.map = newNilMap(map)
   let value = n[1]
   result.map.store(ctx, ctx.index(n[1]), if not isElse: Nil else: Safe, TArg, n.info, n)
 
@@ -919,7 +918,7 @@ proc infix(ctx: NilCheckerContext, l: PNode, r: PNode, magic: TMagic): PNode =
     newSymNode(op, r.info),
     l,
     r)
-  result.typ = newType(tyBool, ctx.idgen, nil)
+  result.typ = newType(tyBool, nextTypeId ctx.idgen, nil)
 
 proc prefixNot(ctx: NilCheckerContext, node: PNode): PNode =
   var cache = newIdentCache()
@@ -929,7 +928,7 @@ proc prefixNot(ctx: NilCheckerContext, node: PNode): PNode =
   result = nkPrefix.newTree(
     newSymNode(op, node.info),
     node)
-  result.typ = newType(tyBool, ctx.idgen, nil)
+  result.typ = newType(tyBool, nextTypeId ctx.idgen, nil)
 
 proc infixEq(ctx: NilCheckerContext, l: PNode, r: PNode): PNode =
   infix(ctx, l, r, mEqRef)
@@ -948,7 +947,7 @@ proc checkCase(n, ctx, map): Check =
   #   c2
   # also a == true is a , a == false is not a
   let base = n[0]
-  result = Check(map: map.copyMap())
+  result.map = map.copyMap()
   result.nilability = Safe
   var a: PNode = nil
   for child in n:
@@ -1220,7 +1219,7 @@ proc check(n: PNode, ctx: NilCheckerContext, map: NilMap): Check =
     result = check(n.sons[1], ctx, map)
   of nkStmtList, nkStmtListExpr, nkChckRangeF, nkChckRange64, nkChckRange,
      nkBracket, nkCurly, nkPar, nkTupleConstr, nkClosure, nkObjConstr, nkElse:
-    result = Check(map: map)
+    result.map = map
     if n.kind in {nkObjConstr, nkTupleConstr}:
       # TODO deeper nested elements?
       # A(field: B()) #
@@ -1247,10 +1246,10 @@ proc check(n: PNode, ctx: NilCheckerContext, map: NilMap): Check =
     result = checkIf(n, ctx, map)
   of nkAsgn, nkFastAsgn, nkSinkAsgn:
     result = checkAsgn(n[0], n[1], ctx, map)
-  of nkVarSection, nkLetSection:
-    result = Check(map: map)
+  of nkVarSection:
+    result.map = map
     for child in n:
-      result = checkAsgn(child[0].skipPragmaExpr, child[2], ctx, result.map)
+      result = checkAsgn(child[0], child[2], ctx, result.map)
   of nkForStmt:
     result = checkFor(n, ctx, map)
   of nkCaseStmt:
@@ -1274,7 +1273,8 @@ proc check(n: PNode, ctx: NilCheckerContext, map: NilMap): Check =
   else:
 
     var elementMap = map.copyMap()
-    var elementCheck = Check(map: elementMap)
+    var elementCheck: Check
+    elementCheck.map = elementMap
     for element in n:
       elementCheck = check(element, ctx, elementCheck.map)
 
@@ -1367,7 +1367,7 @@ proc checkNil*(s: PSym; body: PNode; conf: ConfigRef, idgen: IdGenerator) =
         continue
       map.store(context, context.index(child), typeNilability(child.typ), TArg, child.info, child)
 
-  map.store(context, resultExprIndex, if not s.typ.returnType.isNil and s.typ.returnType.kind == tyRef: Nil else: Safe, TResult, s.ast.info)
+  map.store(context, resultExprIndex, if not s.typ[0].isNil and s.typ[0].kind == tyRef: Nil else: Safe, TResult, s.ast.info)
 
   # echo "checking ", s.name.s, " ", filename
 
@@ -1383,5 +1383,5 @@ proc checkNil*(s: PSym; body: PNode; conf: ConfigRef, idgen: IdGenerator) =
   # (ANotNil, BNotNil) :
   # do we check on asgn nilability at all?
 
-  if not s.typ.returnType.isNil and s.typ.returnType.kind == tyRef and tfNotNil in s.typ.returnType.flags:
+  if not s.typ[0].isNil and s.typ[0].kind == tyRef and tfNotNil in s.typ[0].flags:
     checkResult(s.ast, context, res.map)

compiler/nim.cfg

@@ -9,7 +9,6 @@ define:nimPreviewSlimSystem
 define:nimPreviewCstringConversion
 define:nimPreviewProcConversion
 define:nimPreviewRangeDefault
-define:nimPreviewNonVarDestructor
 threads:off
 
 #import:"$projectpath/testability"
@@ -42,7 +41,6 @@ define:useStdoutAsStdmsg
 @end
 
 @if nimHasWarnBareExcept:
-  warning[BareExcept]:on
   warningAserror[BareExcept]:on
 @end
 
@@ -53,11 +51,3 @@ define:useStdoutAsStdmsg
   warningAsError[ProveInit]:on
 @end
 
-@if nimHasWarnStdPrefix:
-  warning[StdPrefix]:on
-  warningAsError[StdPrefix]:on
-@end
-
-@if nimHasVtables:
-  experimental:vtables
-@end

compiler/nim.nim

@@ -28,7 +28,7 @@ import
   commands, options, msgs, extccomp, main, idents, lineinfos, cmdlinehelper,
   pathutils, modulegraphs
 
-from std/browsers import openDefaultBrowser
+from browsers import openDefaultBrowser
 from nodejs import findNodeJs
 
 when hasTinyCBackend:
@@ -116,9 +116,7 @@ proc handleCmdLine(cache: IdentCache; conf: ConfigRef) =
     conf.backend = backendC
 
   if conf.selectedGC == gcUnselected:
-    if conf.backend in {backendC, backendCpp, backendObjc} or
-        (conf.cmd in cmdDocLike and conf.backend != backendJs) or
-        conf.cmd == cmdGendepend:
+    if conf.backend in {backendC, backendCpp, backendObjc}:
       initOrcDefines(conf)
 
   mainCommand(graph)

compiler/nimblecmd.nim

@@ -9,9 +9,8 @@
 
 ## Implements some helper procs for Nimble (Nim's package manager) support.
 
-import options, msgs, lineinfos, pathutils
-
-import std/[parseutils, strutils, os, tables, sequtils]
+import parseutils, strutils, os, options, msgs, sequtils, lineinfos, pathutils,
+  tables
 
 when defined(nimPreviewSlimSystem):
   import std/[syncio, assertions]
@@ -79,8 +78,6 @@ proc getPathVersionChecksum*(p: string): tuple[name, version, checksum: string]
   ## ``/home/user/.nimble/pkgs/package-0.1-febadeaea2345e777f0f6f8433f7f0a52edd5d1b`` into
   ## ``("/home/user/.nimble/pkgs/package", "0.1", "febadeaea2345e777f0f6f8433f7f0a52edd5d1b")``
 
-  result = ("", "", "")
-
   const checksumSeparator = '-'
   const versionSeparator = '-'
   const specialVersionSepartator = "-#"

compiler/nimconf.nim

@@ -10,10 +10,8 @@
 # This module handles the reading of the config file.
 
 import
-  llstream, commands, msgs, lexer, ast,
-  options, idents, wordrecg, lineinfos, pathutils, scriptconfig
-
-import std/[os, strutils, strtabs]
+  llstream, commands, os, strutils, msgs, lexer, ast,
+  options, idents, wordrecg, strtabs, lineinfos, pathutils, scriptconfig
 
 when defined(nimPreviewSlimSystem):
   import std/syncio
@@ -164,7 +162,7 @@ proc checkSymbol(L: Lexer, tok: Token) =
     lexMessage(L, errGenerated, "expected identifier, but got: " & $tok)
 
 proc parseAssignment(L: var Lexer, tok: var Token;
-                     config: ConfigRef; filename: AbsoluteFile; condStack: var seq[bool]) =
+                     config: ConfigRef; condStack: var seq[bool]) =
   if tok.ident != nil:
     if tok.ident.s == "-" or tok.ident.s == "--":
       confTok(L, tok, config, condStack)           # skip unnecessary prefix
@@ -207,7 +205,6 @@ proc parseAssignment(L: var Lexer, tok: var Token;
       checkSymbol(L, tok)
       val.add($tok)
       confTok(L, tok, config, condStack)
-  config.currentConfigDir = parentDir(filename.string)
   if percent:
     processSwitch(s, strtabs.`%`(val, config.configVars,
                                 {useEnvironment, useEmpty}), passPP, info, config)
@@ -222,11 +219,12 @@ proc readConfigFile*(filename: AbsoluteFile; cache: IdentCache;
     stream: PLLStream
   stream = llStreamOpen(filename, fmRead)
   if stream != nil:
+    initToken(tok)
     openLexer(L, filename, stream, cache, config)
-    tok = Token(tokType: tkEof)       # to avoid a pointless warning
+    tok.tokType = tkEof       # to avoid a pointless warning
     var condStack: seq[bool] = @[]
     confTok(L, tok, config, condStack)           # read in the first token
-    while tok.tokType != tkEof: parseAssignment(L, tok, config, filename, condStack)
+    while tok.tokType != tkEof: parseAssignment(L, tok, config, condStack)
     if condStack.len > 0: lexMessage(L, errGenerated, "expected @end")
     closeLexer(L)
     return true

compiler/nimeval.nim

@@ -11,8 +11,8 @@
 import
   ast, modules, condsyms,
   options, llstream, lineinfos, vm,
-  vmdef, modulegraphs, idents, pathutils,
-  scriptconfig, std/[compilesettings, tables, os]
+  vmdef, modulegraphs, idents, os, pathutils,
+  scriptconfig, std/[compilesettings, tables]
 
 import pipelines
 
@@ -40,7 +40,7 @@ proc selectUniqueSymbol*(i: Interpreter; name: string;
   assert i != nil
   assert i.mainModule != nil, "no main module selected"
   let n = getIdent(i.graph.cache, name)
-  var it: ModuleIter = default(ModuleIter)
+  var it: ModuleIter
   var s = initModuleIter(it, i.graph, i.mainModule, n)
   result = nil
   while s != nil:

compiler/nimlexbase.nim

@@ -12,9 +12,8 @@
 # handling that exists! Only at line endings checks are necessary
 # if the buffer needs refilling.
 
-import llstream
-
-import std/strutils
+import
+  llstream, strutils
 
 when defined(nimPreviewSlimSystem):
   import std/assertions

compiler/nimpaths.nim

@@ -17,7 +17,7 @@ interpolation variables:
 Unstable API
 ]##
 
-import std/[os, strutils]
+import os, strutils
 
 when defined(nimPreviewSlimSystem):
   import std/assertions

compiler/nimsets.nim

@@ -65,7 +65,7 @@ proc toBitSet*(conf: ConfigRef; s: PNode): TBitSet =
   result = @[]
   var first: Int128 = Zero
   var j: Int128 = Zero
-  first = firstOrd(conf, s.typ.elementType)
+  first = firstOrd(conf, s.typ[0])
   bitSetInit(result, int(getSize(conf, s.typ)))
   for i in 0..<s.len:
     if s[i].kind == nkRange:

compiler/nodejs.nim

@@ -1,4 +1,4 @@
-import std/os
+import os
 
 proc findNodeJs*(): string {.inline.} =
   ## Find NodeJS executable and return it as a string.

compiler/nodekinds.nim

@@ -1,211 +0,0 @@
-#
-#
-#           The Nim Compiler
-#        (c) Copyright 2015 Andreas Rumpf
-#
-#    See the file "copying.txt", included in this
-#    distribution, for details about the copyright.
-#
-
-## NodeKind enum.
-
-type
-  TNodeKind* = enum # order is extremely important, because ranges are used
-                    # to check whether a node belongs to a certain class
-    nkNone,               # unknown node kind: indicates an error
-                          # Expressions:
-                          # Atoms:
-    nkEmpty,              # the node is empty
-    nkIdent,              # node is an identifier
-    nkSym,                # node is a symbol
-    nkType,               # node is used for its typ field
-
-    nkCharLit,            # a character literal ''
-    nkIntLit,             # an integer literal
-    nkInt8Lit,
-    nkInt16Lit,
-    nkInt32Lit,
-    nkInt64Lit,
-    nkUIntLit,            # an unsigned integer literal
-    nkUInt8Lit,
-    nkUInt16Lit,
-    nkUInt32Lit,
-    nkUInt64Lit,
-    nkFloatLit,           # a floating point literal
-    nkFloat32Lit,
-    nkFloat64Lit,
-    nkFloat128Lit,
-    nkStrLit,             # a string literal ""
-    nkRStrLit,            # a raw string literal r""
-    nkTripleStrLit,       # a triple string literal """
-    nkNilLit,             # the nil literal
-                          # end of atoms
-    nkComesFrom,          # "comes from" template/macro information for
-                          # better stack trace generation
-    nkDotCall,            # used to temporarily flag a nkCall node;
-                          # this is used
-                          # for transforming ``s.len`` to ``len(s)``
-
-    nkCommand,            # a call like ``p 2, 4`` without parenthesis
-    nkCall,               # a call like p(x, y) or an operation like +(a, b)
-    nkCallStrLit,         # a call with a string literal
-                          # x"abc" has two sons: nkIdent, nkRStrLit
-                          # x"""abc""" has two sons: nkIdent, nkTripleStrLit
-    nkInfix,              # a call like (a + b)
-    nkPrefix,             # a call like !a
-    nkPostfix,            # something like a! (also used for visibility)
-    nkHiddenCallConv,     # an implicit type conversion via a type converter
-
-    nkExprEqExpr,         # a named parameter with equals: ''expr = expr''
-    nkExprColonExpr,      # a named parameter with colon: ''expr: expr''
-    nkIdentDefs,          # a definition like `a, b: typeDesc = expr`
-                          # either typeDesc or expr may be nil; used in
-                          # formal parameters, var statements, etc.
-    nkVarTuple,           # a ``var (a, b) = expr`` construct
-    nkPar,                # syntactic (); may be a tuple constructor
-    nkObjConstr,          # object constructor: T(a: 1, b: 2)
-    nkCurly,              # syntactic {}
-    nkCurlyExpr,          # an expression like a{i}
-    nkBracket,            # syntactic []
-    nkBracketExpr,        # an expression like a[i..j, k]
-    nkPragmaExpr,         # an expression like a{.pragmas.}
-    nkRange,              # an expression like i..j
-    nkDotExpr,            # a.b
-    nkCheckedFieldExpr,   # a.b, but b is a field that needs to be checked
-    nkDerefExpr,          # a^
-    nkIfExpr,             # if as an expression
-    nkElifExpr,
-    nkElseExpr,
-    nkLambda,             # lambda expression
-    nkDo,                 # lambda block appering as trailing proc param
-    nkAccQuoted,          # `a` as a node
-
-    nkTableConstr,        # a table constructor {expr: expr}
-    nkBind,               # ``bind expr`` node
-    nkClosedSymChoice,    # symbol choice node; a list of nkSyms (closed)
-    nkOpenSymChoice,      # symbol choice node; a list of nkSyms (open)
-    nkHiddenStdConv,      # an implicit standard type conversion
-    nkHiddenSubConv,      # an implicit type conversion from a subtype
-                          # to a supertype
-    nkConv,               # a type conversion
-    nkCast,               # a type cast
-    nkStaticExpr,         # a static expr
-    nkAddr,               # a addr expression
-    nkHiddenAddr,         # implicit address operator
-    nkHiddenDeref,        # implicit ^ operator
-    nkObjDownConv,        # down conversion between object types
-    nkObjUpConv,          # up conversion between object types
-    nkChckRangeF,         # range check for floats
-    nkChckRange64,        # range check for 64 bit ints
-    nkChckRange,          # range check for ints
-    nkStringToCString,    # string to cstring
-    nkCStringToString,    # cstring to string
-                          # end of expressions
-
-    nkAsgn,               # a = b
-    nkFastAsgn,           # internal node for a fast ``a = b``
-                          # (no string copy)
-    nkGenericParams,      # generic parameters
-    nkFormalParams,       # formal parameters
-    nkOfInherit,          # inherited from symbol
-
-    nkImportAs,           # a 'as' b in an import statement
-    nkProcDef,            # a proc
-    nkMethodDef,          # a method
-    nkConverterDef,       # a converter
-    nkMacroDef,           # a macro
-    nkTemplateDef,        # a template
-    nkIteratorDef,        # an iterator
-
-    nkOfBranch,           # used inside case statements
-                          # for (cond, action)-pairs
-    nkElifBranch,         # used in if statements
-    nkExceptBranch,       # an except section
-    nkElse,               # an else part
-    nkAsmStmt,            # an assembler block
-    nkPragma,             # a pragma statement
-    nkPragmaBlock,        # a pragma with a block
-    nkIfStmt,             # an if statement
-    nkWhenStmt,           # a when expression or statement
-    nkForStmt,            # a for statement
-    nkParForStmt,         # a parallel for statement
-    nkWhileStmt,          # a while statement
-    nkCaseStmt,           # a case statement
-    nkTypeSection,        # a type section (consists of type definitions)
-    nkVarSection,         # a var section
-    nkLetSection,         # a let section
-    nkConstSection,       # a const section
-    nkConstDef,           # a const definition
-    nkTypeDef,            # a type definition
-    nkYieldStmt,          # the yield statement as a tree
-    nkDefer,              # the 'defer' statement
-    nkTryStmt,            # a try statement
-    nkFinally,            # a finally section
-    nkRaiseStmt,          # a raise statement
-    nkReturnStmt,         # a return statement
-    nkBreakStmt,          # a break statement
-    nkContinueStmt,       # a continue statement
-    nkBlockStmt,          # a block statement
-    nkStaticStmt,         # a static statement
-    nkDiscardStmt,        # a discard statement
-    nkStmtList,           # a list of statements
-    nkImportStmt,         # an import statement
-    nkImportExceptStmt,   # an import x except a statement
-    nkExportStmt,         # an export statement
-    nkExportExceptStmt,   # an 'export except' statement
-    nkFromStmt,           # a from * import statement
-    nkIncludeStmt,        # an include statement
-    nkBindStmt,           # a bind statement
-    nkMixinStmt,          # a mixin statement
-    nkUsingStmt,          # an using statement
-    nkCommentStmt,        # a comment statement
-    nkStmtListExpr,       # a statement list followed by an expr; this is used
-                          # to allow powerful multi-line templates
-    nkBlockExpr,          # a statement block ending in an expr; this is used
-                          # to allow powerful multi-line templates that open a
-                          # temporary scope
-    nkStmtListType,       # a statement list ending in a type; for macros
-    nkBlockType,          # a statement block ending in a type; for macros
-                          # types as syntactic trees:
-
-    nkWith,               # distinct with `foo`
-    nkWithout,            # distinct without `foo`
-
-    nkTypeOfExpr,         # type(1+2)
-    nkObjectTy,           # object body
-    nkTupleTy,            # tuple body
-    nkTupleClassTy,       # tuple type class
-    nkTypeClassTy,        # user-defined type class
-    nkStaticTy,           # ``static[T]``
-    nkRecList,            # list of object parts
-    nkRecCase,            # case section of object
-    nkRecWhen,            # when section of object
-    nkRefTy,              # ``ref T``
-    nkPtrTy,              # ``ptr T``
-    nkVarTy,              # ``var T``
-    nkConstTy,            # ``const T``
-    nkOutTy,              # ``out T``
-    nkDistinctTy,         # distinct type
-    nkProcTy,             # proc type
-    nkIteratorTy,         # iterator type
-    nkSinkAsgn,           # '=sink(x, y)'
-    nkEnumTy,             # enum body
-    nkEnumFieldDef,       # `ident = expr` in an enumeration
-    nkArgList,            # argument list
-    nkPattern,            # a special pattern; used for matching
-    nkHiddenTryStmt,      # a hidden try statement
-    nkClosure,            # (prc, env)-pair (internally used for code gen)
-    nkGotoState,          # used for the state machine (for iterators)
-    nkState,              # give a label to a code section (for iterators)
-    nkBreakState,         # special break statement for easier code generation
-    nkFuncDef,            # a func
-    nkTupleConstr         # a tuple constructor
-    nkError               # erroneous AST node
-    nkModuleRef           # for .rod file support: A (moduleId, itemId) pair
-    nkReplayAction        # for .rod file support: A replay action
-    nkNilRodNode          # for .rod file support: a 'nil' PNode
-    nkOpenSym             # container for captured sym that can be overriden by local symbols
-
-const
-  nkCallKinds* = {nkCall, nkInfix, nkPrefix, nkPostfix,
-                  nkCommand, nkCallStrLit, nkHiddenCallConv}

compiler/optimizer.nim

@@ -12,11 +12,11 @@
 ## - recognize "all paths lead to 'wasMoved(x)'"
 
 import
-  ast, renderer, idents
+  ast, renderer, idents, intsets
 
 from trees import exprStructuralEquivalent
 
-import std/[strutils, intsets]
+import std/strutils
 
 const
   nfMarkForDeletion = nfNone # faster than a lookup table
@@ -66,7 +66,7 @@ proc mergeBasicBlockInfo(parent: var BasicBlock; this: BasicBlock) {.inline.} =
 proc wasMovedTarget(matches: var IntSet; branch: seq[PNode]; moveTarget: PNode): bool =
   result = false
   for i in 0..<branch.len:
-    if exprStructuralEquivalent(branch[i][1].skipHiddenAddr, moveTarget,
+    if exprStructuralEquivalent(branch[i][1].skipAddr, moveTarget,
                                 strictSymEquality = true):
       result = true
       matches.incl i
@@ -76,7 +76,7 @@ proc intersect(summary: var seq[PNode]; branch: seq[PNode]) =
   var i = 0
   var matches = initIntSet()
   while i < summary.len:
-    if wasMovedTarget(matches, branch, summary[i][1].skipHiddenAddr):
+    if wasMovedTarget(matches, branch, summary[i][1].skipAddr):
       inc i
     else:
       summary.del i
@@ -87,7 +87,7 @@ proc intersect(summary: var seq[PNode]; branch: seq[PNode]) =
 proc invalidateWasMoved(c: var BasicBlock; x: PNode) =
   var i = 0
   while i < c.wasMovedLocs.len:
-    if exprStructuralEquivalent(c.wasMovedLocs[i][1].skipHiddenAddr, x,
+    if exprStructuralEquivalent(c.wasMovedLocs[i][1].skipAddr, x,
                                 strictSymEquality = true):
       c.wasMovedLocs.del i
     else:
@@ -96,7 +96,7 @@ proc invalidateWasMoved(c: var BasicBlock; x: PNode) =
 proc wasMovedDestroyPair(c: var Con; b: var BasicBlock; d: PNode) =
   var i = 0
   while i < b.wasMovedLocs.len:
-    if exprStructuralEquivalent(b.wasMovedLocs[i][1].skipHiddenAddr, d[1].skipHiddenAddr,
+    if exprStructuralEquivalent(b.wasMovedLocs[i][1].skipAddr, d[1].skipAddr,
                                 strictSymEquality = true):
       b.wasMovedLocs[i].flags.incl nfMarkForDeletion
       c.somethingTodo = true
@@ -280,7 +280,7 @@ proc optimize*(n: PNode): PNode =
     Now assume 'use' raises, then we shouldn't do the 'wasMoved(s)'
   ]#
   var c: Con = Con()
-  var b: BasicBlock = default(BasicBlock)
+  var b: BasicBlock
   analyse(c, b, n)
   if c.somethingTodo:
     result = shallowCopy(n)

compiler/options.nim

@@ -8,12 +8,11 @@
 #
 
 import
-  lineinfos, platform,
-  prefixmatches, pathutils, nimpaths
+  os, strutils, strtabs, sets, lineinfos, platform,
+  prefixmatches, pathutils, nimpaths, tables
 
-import std/[tables, os, strutils, strtabs, sets]
-from std/terminal import isatty
-from std/times import utc, fromUnix, local, getTime, format, DateTime
+from terminal import isatty
+from times import utc, fromUnix, local, getTime, format, DateTime
 from std/private/globs import nativeToUnixPath
 
 when defined(nimPreviewSlimSystem):
@@ -25,7 +24,7 @@ const
   useEffectSystem* = true
   useWriteTracking* = false
   hasFFI* = defined(nimHasLibFFI)
-  copyrightYear* = "2024"
+  copyrightYear* = "2023"
 
   nimEnableCovariance* = defined(nimEnableCovariance)
 
@@ -86,7 +85,6 @@ type                          # please make sure we have under 32 options
                               # also: generate header file
     optIdeDebug               # idetools: debug mode
     optIdeTerse               # idetools: use terse descriptions
-    optIdeExceptionInlayHints
     optExcessiveStackTrace    # fully qualified module filenames
     optShowAllMismatches      # show all overloading resolution candidates
     optWholeProject           # for 'doc': output any dependency
@@ -145,11 +143,10 @@ type
   Command* = enum  ## Nim's commands
     cmdNone # not yet processed command
     cmdUnknown # command unmapped
-    cmdCompileToC, cmdCompileToCpp, cmdCompileToOC, cmdCompileToJS,
+    cmdCompileToC, cmdCompileToCpp, cmdCompileToOC, cmdCompileToJS
     cmdCrun # compile and run in nimache
     cmdTcc # run the project via TCC backend
     cmdCheck # semantic checking for whole project
-    cmdM     # only compile a single
     cmdParse # parse a single file (for debugging)
     cmdRod # .rod to some text representation (for debugging)
     cmdIdeTools # ide tools (e.g. nimsuggest)
@@ -173,12 +170,12 @@ type
     # old unused: cmdInterpret, cmdDef: def feature (find definition for IDEs)
 
 const
-  cmdBackends* = {cmdCompileToC, cmdCompileToCpp, cmdCompileToOC,
-                  cmdCompileToJS, cmdCrun}
+  cmdBackends* = {cmdCompileToC, cmdCompileToCpp, cmdCompileToOC, cmdCompileToJS, cmdCrun}
   cmdDocLike* = {cmdDoc0, cmdDoc, cmdDoc2tex, cmdJsondoc0, cmdJsondoc,
                  cmdCtags, cmdBuildindex}
 
 type
+  NimVer* = tuple[major: int, minor: int, patch: int]
   TStringSeq* = seq[string]
   TGCMode* = enum             # the selected GC
     gcUnselected = "unselected"
@@ -198,7 +195,7 @@ type
   IdeCmd* = enum
     ideNone, ideSug, ideCon, ideDef, ideUse, ideDus, ideChk, ideChkFile, ideMod,
     ideHighlight, ideOutline, ideKnown, ideMsg, ideProject, ideGlobalSymbols,
-    ideRecompile, ideChanged, ideType, ideDeclaration, ideExpand, ideInlayHints
+    ideRecompile, ideChanged, ideType, ideDeclaration, ideExpand
 
   Feature* = enum  ## experimental features; DO NOT RENAME THESE!
     dotOperators,
@@ -224,11 +221,8 @@ type
     flexibleOptionalParams,
     strictDefs,
     strictCaseObjects,
-    inferGenericTypes,
-    openSym, # remove nfDisabledOpenSym when this is default
-    # alternative to above:
-    genericsOpenSym
-    vtables
+    inferGenericTypes
+    noforwardDecl
 
   LegacyFeature* = enum
     allowSemcheckedAstModification,
@@ -242,18 +236,13 @@ type
     laxEffects
       ## Lax effects system prior to Nim 2.0.
     verboseTypeMismatch
-    emitGenerics
-      ## generics are emitted in the module that contains them.
-      ## Useful for libraries that rely on local passC
-    jsNoLambdaLifting
-      ## Old transformation for closures in JS backend
 
   SymbolFilesOption* = enum
     disabledSf, writeOnlySf, readOnlySf, v2Sf, stressTest
 
   TSystemCC* = enum
     ccNone, ccGcc, ccNintendoSwitch, ccLLVM_Gcc, ccCLang, ccBcc, ccVcc,
-    ccTcc, ccEnv, ccIcl, ccIcc, ccClangCl, ccHipcc, ccNvcc
+    ccTcc, ccEnv, ccIcl, ccIcc, ccClangCl
 
   ExceptionSystem* = enum
     excNone,   # no exception system selected yet
@@ -293,25 +282,9 @@ type
     version*: int
     endLine*: uint16
     endCol*: int
-    inlayHintInfo*: SuggestInlayHint
 
   Suggestions* = seq[Suggest]
 
-  SuggestInlayHintKind* = enum
-    sihkType = "Type",
-    sihkParameter = "Parameter"
-    sihkException = "Exception"
-
-  SuggestInlayHint* = ref object
-    kind*: SuggestInlayHintKind
-    line*: int                   # Starts at 1
-    column*: int                 # Starts at 0
-    label*: string
-    paddingLeft*: bool
-    paddingRight*: bool
-    allowInsert*: bool
-    tooltip*: string
-
   ProfileInfo* = object
     time*: float
     count*: int
@@ -369,6 +342,7 @@ type
     arguments*: string ## the arguments to be passed to the program that
                        ## should be run
     ideCmd*: IdeCmd
+    oldNewlines*: bool
     cCompiler*: TSystemCC # the used compiler
     modifiedyNotes*: TNoteKinds # notes that have been set/unset from either cmdline/configs
     cmdlineNotes*: TNoteKinds # notes that have been set/unset from cmdline
@@ -395,7 +369,8 @@ type
     outDir*: AbsoluteDir
     jsonBuildFile*: AbsoluteFile
     prefixDir*, libpath*, nimcacheDir*: AbsoluteDir
-    dllOverrides*, moduleOverrides*, cfileSpecificOptions*: StringTableRef
+    nimStdlibVersion*: NimVer
+    dllOverrides, moduleOverrides*, cfileSpecificOptions*: StringTableRef
     projectName*: string # holds a name like 'nim'
     projectPath*: AbsoluteDir # holds a path like /home/alice/projects/nim/compiler/
     projectFull*: AbsoluteFile # projectPath/projectName
@@ -407,6 +382,7 @@ type
     commandArgs*: seq[string] # any arguments after the main command
     commandLine*: string
     extraCmds*: seq[string] # for writeJsonBuildInstructions
+    keepComments*: bool # whether the parser needs to keep comments
     implicitImports*: seq[string] # modules that are to be implicitly imported
     implicitIncludes*: seq[string] # modules that are to be implicitly included
     docSeeSrcUrl*: string # if empty, no seeSrc will be generated. \
@@ -443,10 +419,17 @@ type
     expandNodeResult*: string
     expandPosition*: TLineInfo
 
-    currentConfigDir*: string # used for passPP only; absolute dir
-    clientProcessId*: int
-
 
+proc parseNimVersion*(a: string): NimVer =
+  # could be moved somewhere reusable
+  result = default(NimVer)
+  if a.len > 0:
+    let b = a.split(".")
+    assert b.len == 3, a
+    template fn(i) = result[i] = b[i].parseInt # could be optimized if needed
+    fn(0)
+    fn(1)
+    fn(2)
 
 proc assignIfDefault*[T](result: var T, val: T, def = default(T)) =
   ## if `result` was already assigned to a value (that wasn't `def`), this is a noop.
@@ -580,6 +563,7 @@ proc newConfigRef*(): ConfigRef =
     command: "", # the main command (e.g. cc, check, scan, etc)
     commandArgs: @[], # any arguments after the main command
     commandLine: "",
+    keepComments: true, # whether the parser needs to keep comments
     implicitImports: @[], # modules that are to be implicitly imported
     implicitIncludes: @[], # modules that are to be implicitly included
     docSeeSrcUrl: "",
@@ -599,7 +583,6 @@ proc newConfigRef*(): ConfigRef =
     maxLoopIterationsVM: 10_000_000,
     vmProfileData: newProfileData(),
     spellSuggestMax: spellSuggestSecretSauce,
-    currentConfigDir: ""
   )
   initConfigRefCommon(result)
   setTargetFromSystem(result.target)
@@ -620,6 +603,12 @@ proc newPartialConfigRef*(): ConfigRef =
 proc cppDefine*(c: ConfigRef; define: string) =
   c.cppDefines.incl define
 
+proc getStdlibVersion*(conf: ConfigRef): NimVer =
+  if conf.nimStdlibVersion == (0,0,0):
+    let s = conf.symbols.getOrDefault("nimVersion", "")
+    conf.nimStdlibVersion = s.parseNimVersion
+  result = conf.nimStdlibVersion
+
 proc isDefined*(conf: ConfigRef; symbol: string): bool =
   if conf.symbols.hasKey(symbol):
     result = true
@@ -773,10 +762,7 @@ proc setFromProjectName*(conf: ConfigRef; projectName: string) =
     conf.projectFull = AbsoluteFile projectName
   let p = splitFile(conf.projectFull)
   let dir = if p.dir.isEmpty: AbsoluteDir getCurrentDir() else: p.dir
-  try:
-    conf.projectPath = AbsoluteDir canonicalizePath(conf, AbsoluteFile dir)
-  except OSError:
-    conf.projectPath = dir
+  conf.projectPath = AbsoluteDir canonicalizePath(conf, AbsoluteFile dir)
   conf.projectName = p.name
 
 proc removeTrailingDirSep*(path: string): string =
@@ -809,17 +795,16 @@ proc getNimcacheDir*(conf: ConfigRef): AbsoluteDir =
     else: "_d"
 
   # XXX projectName should always be without a file extension!
-  result =
-    if not conf.nimcacheDir.isEmpty:
-      conf.nimcacheDir
-    elif conf.backend == backendJs:
-      if conf.outDir.isEmpty:
-        conf.projectPath / genSubDir
-      else:
-        conf.outDir / genSubDir
-    else:
-      AbsoluteDir(getOsCacheDir() / splitFile(conf.projectName).name &
-        nimcacheSuffix(conf))
+  result = if not conf.nimcacheDir.isEmpty:
+             conf.nimcacheDir
+           elif conf.backend == backendJs:
+             if conf.outDir.isEmpty:
+               conf.projectPath / genSubDir
+             else:
+               conf.outDir / genSubDir
+           else:
+            AbsoluteDir(getOsCacheDir() / splitFile(conf.projectName).name &
+               nimcacheSuffix(conf))
 
 proc pathSubs*(conf: ConfigRef; p, config: string): string =
   let home = removeTrailingDirSep(os.getHomeDir())
@@ -897,7 +882,7 @@ const stdlibDirs* = [
 
 const
   pkgPrefix = "pkg/"
-  stdPrefix* = "std/"
+  stdPrefix = "std/"
 
 proc getRelativePathFromConfigPath*(conf: ConfigRef; f: AbsoluteFile, isTitle = false): RelativeFile =
   result = RelativeFile("")
@@ -1077,7 +1062,6 @@ proc `$`*(c: IdeCmd): string =
   of ideRecompile: "recompile"
   of ideChanged: "changed"
   of ideType: "type"
-  of ideInlayHints: "inlayHints"
 
 proc floatInt64Align*(conf: ConfigRef): int16 =
   ## Returns either 4 or 8 depending on reasons.

compiler/parampatterns.nim

@@ -10,11 +10,9 @@
 ## This module implements the pattern matching features for term rewriting
 ## macro support.
 
-import ast, types, msgs, idents, renderer, wordrecg, trees,
+import strutils, ast, types, msgs, idents, renderer, wordrecg, trees,
   options
 
-import std/strutils
-
 # we precompile the pattern here for efficiency into some internal
 # stack based VM :-) Why? Because it's fun; I did no benchmarks to see if that
 # actually improves performance.
@@ -266,7 +264,7 @@ proc isAssignable*(owner: PSym, n: PNode): TAssignableResult =
     if skipTypes(n.typ, abstractPtrs-{tyTypeDesc}).kind in
         {tyOpenArray, tyTuple, tyObject}:
       result = isAssignable(owner, n[1])
-    elif compareTypes(n.typ, n[1].typ, dcEqIgnoreDistinct, {IgnoreRangeShallow}):
+    elif compareTypes(n.typ, n[1].typ, dcEqIgnoreDistinct):
       # types that are equal modulo distinction preserve l-value:
       result = isAssignable(owner, n[1])
   of nkHiddenDeref:
@@ -283,15 +281,8 @@ proc isAssignable*(owner: PSym, n: PNode): TAssignableResult =
   of nkObjUpConv, nkObjDownConv, nkCheckedFieldExpr:
     result = isAssignable(owner, n[0])
   of nkCallKinds:
-    let m = getMagic(n)
-    if m == mSlice:
-      # builtin slice keeps l-value-ness
-      # except for pointers because slice dereferences
-      if n[1].typ.kind == tyPtr:
-        result = arLValue
-      else:
-        result = isAssignable(owner, n[1])
-    elif m == mArrGet:
+    # builtin slice keeps lvalue-ness:
+    if getMagic(n) in {mArrGet, mSlice}:
       result = isAssignable(owner, n[1])
     elif n.typ != nil:
       case n.typ.kind

compiler/parser.nim

@@ -49,16 +49,9 @@ when isMainModule or defined(nimTestGrammar):
     checkGrammarFile()
 
 import
-  llstream, lexer, idents, msgs, options, lineinfos,
+  llstream, lexer, idents, strutils, ast, msgs, options, lineinfos,
   pathutils
 
-when not defined(nimCustomAst):
-  import ast
-else:
-  import plugins / customast
-
-import std/strutils
-
 when defined(nimpretty):
   import layouter
 
@@ -78,8 +71,7 @@ type
     bufposPrevious*: int
     inPragma*: int            # Pragma level
     inSemiStmtList*: int
-    when not defined(nimCustomAst):
-      emptyNode: PNode
+    emptyNode: PNode
     when defined(nimpretty):
       em*: Emitter
 
@@ -89,9 +81,9 @@ type
   PrimaryMode = enum
     pmNormal, pmTypeDesc, pmTypeDef, pmTrySimple
 
-when defined(nimCustomAst):
-  # For the `customast` version we cannot share nodes, not even empty nodes:
-  template emptyNode(p: Parser): PNode = newNode(nkEmpty)
+proc parseAll*(p: var Parser): PNode
+proc closeParser*(p: var Parser)
+proc parseTopLevelStmt*(p: var Parser): PNode
 
 # helpers for the other parsers
 proc isOperator*(tok: Token): bool
@@ -101,7 +93,7 @@ proc skipComment*(p: var Parser, node: PNode)
 proc newNodeP*(kind: TNodeKind, p: Parser): PNode
 proc newIntNodeP*(kind: TNodeKind, intVal: BiggestInt, p: Parser): PNode
 proc newFloatNodeP*(kind: TNodeKind, floatVal: BiggestFloat, p: Parser): PNode
-proc newStrNodeP*(kind: TNodeKind, strVal: sink string, p: Parser): PNode
+proc newStrNodeP*(kind: TNodeKind, strVal: string, p: Parser): PNode
 proc newIdentNodeP*(ident: PIdent, p: Parser): PNode
 proc expectIdentOrKeyw*(p: Parser)
 proc expectIdent*(p: Parser)
@@ -150,22 +142,23 @@ proc openParser*(p: var Parser, fileIdx: FileIndex, inputStream: PLLStream,
                  cache: IdentCache; config: ConfigRef) =
   ## Open a parser, using the given arguments to set up its internal state.
   ##
-  reset(p.tok)
+  initToken(p.tok)
   openLexer(p.lex, fileIdx, inputStream, cache, config)
   when defined(nimpretty):
     openEmitter(p.em, cache, config, fileIdx)
   getTok(p)                   # read the first token
   p.firstTok = true
-  when not defined(nimCustomAst):
-    p.emptyNode = newNode(nkEmpty)
+  p.emptyNode = newNode(nkEmpty)
 
 proc openParser*(p: var Parser, filename: AbsoluteFile, inputStream: PLLStream,
                  cache: IdentCache; config: ConfigRef) =
   openParser(p, fileInfoIdx(config, filename), inputStream, cache, config)
 
-proc closeParser*(p: var Parser) =
+proc closeParser(p: var Parser) =
   ## Close a parser, freeing up its resources.
   closeLexer(p.lex)
+  when defined(nimpretty):
+    closeEmitter(p.em)
 
 proc parMessage(p: Parser, msg: TMsgKind, arg = "") =
   ## Produce and emit the parser message `arg` to output.
@@ -272,20 +265,24 @@ proc indAndComment(p: var Parser, n: PNode, maybeMissEquals = false) =
     skipComment(p, n)
 
 proc newNodeP(kind: TNodeKind, p: Parser): PNode =
-  result = newNode(kind, parLineInfo(p))
+  result = newNodeI(kind, parLineInfo(p))
 
 proc newIntNodeP(kind: TNodeKind, intVal: BiggestInt, p: Parser): PNode =
-  result = newAtom(kind, intVal, parLineInfo(p))
+  result = newNodeP(kind, p)
+  result.intVal = intVal
 
 proc newFloatNodeP(kind: TNodeKind, floatVal: BiggestFloat,
                    p: Parser): PNode =
-  result = newAtom(kind, floatVal, parLineInfo(p))
+  result = newNodeP(kind, p)
+  result.floatVal = floatVal
 
-proc newStrNodeP(kind: TNodeKind, strVal: sink string, p: Parser): PNode =
-  result = newAtom(kind, strVal, parLineInfo(p))
+proc newStrNodeP(kind: TNodeKind, strVal: string, p: Parser): PNode =
+  result = newNodeP(kind, p)
+  result.strVal = strVal
 
 proc newIdentNodeP(ident: PIdent, p: Parser): PNode =
-  result = newAtom(ident, parLineInfo(p))
+  result = newNodeP(nkIdent, p)
+  result.ident = ident
 
 proc parseExpr(p: var Parser): PNode
 proc parseStmt(p: var Parser): PNode
@@ -388,7 +385,7 @@ proc parseSymbol(p: var Parser, mode = smNormal): PNode =
     while true:
       case p.tok.tokType
       of tkAccent:
-        if not result.hasSon:
+        if result.len == 0:
           parMessage(p, errIdentifierExpected, p.tok)
         break
       of tkOpr, tkDot, tkDotDot, tkEquals, tkParLe..tkParDotRi:
@@ -398,7 +395,8 @@ proc parseSymbol(p: var Parser, mode = smNormal): PNode =
                                 tkParLe..tkParDotRi}:
           accm.add($p.tok)
           getTok(p)
-        let node = newAtom(p.lex.cache.getIdent(accm), lineinfo)
+        let node = newNodeI(nkIdent, lineinfo)
+        node.ident = p.lex.cache.getIdent(accm)
         result.add(node)
       of tokKeywordLow..tokKeywordHigh, tkSymbol, tkIntLit..tkCustomLit:
         result.add(newIdentNodeP(p.lex.cache.getIdent($p.tok), p))
@@ -515,26 +513,26 @@ proc exprColonEqExprList(p: var Parser, kind: TNodeKind,
 proc dotExpr(p: var Parser, a: PNode): PNode =
   var info = p.parLineInfo
   getTok(p)
-  result = newNode(nkDotExpr, info)
+  result = newNodeI(nkDotExpr, info)
   optInd(p, result)
   result.add(a)
   result.add(parseSymbol(p, smAfterDot))
   if p.tok.tokType == tkBracketLeColon and tsLeading notin p.tok.spacing:
-    var x = newNode(nkBracketExpr, p.parLineInfo)
+    var x = newNodeI(nkBracketExpr, p.parLineInfo)
     # rewrite 'x.y[:z]()' to 'y[z](x)'
-    x.add result.secondSon
+    x.add result[1]
     exprList(p, tkBracketRi, x)
     eat(p, tkBracketRi)
-    var y = newNode(nkCall, p.parLineInfo)
+    var y = newNodeI(nkCall, p.parLineInfo)
     y.add x
-    y.add result.firstSon
+    y.add result[0]
     if p.tok.tokType == tkParLe and tsLeading notin p.tok.spacing:
       exprColonEqExprListAux(p, tkParRi, y)
     result = y
 
 proc dotLikeExpr(p: var Parser, a: PNode): PNode =
   var info = p.parLineInfo
-  result = newNode(nkInfix, info)
+  result = newNodeI(nkInfix, info)
   optInd(p, result)
   var opNode = newIdentNodeP(p.tok.ident, p)
   getTok(p)
@@ -590,18 +588,12 @@ proc parseCast(p: var Parser): PNode =
   eat(p, tkParRi)
   setEndInfo()
 
-template setNodeFlag(n: PNode; f: untyped) =
-  when defined(nimCustomAst):
-    discard
-  else:
-    incl n.flags, f
-
 proc setBaseFlags(n: PNode, base: NumericalBase) =
   case base
   of base10: discard
-  of base2: setNodeFlag(n, nfBase2)
-  of base8: setNodeFlag(n, nfBase8)
-  of base16: setNodeFlag(n, nfBase16)
+  of base2: incl(n.flags, nfBase2)
+  of base8: incl(n.flags, nfBase8)
+  of base16: incl(n.flags, nfBase16)
 
 proc parseGStrLit(p: var Parser, a: PNode): PNode =
   case p.tok.tokType
@@ -897,7 +889,7 @@ proc primarySuffix(p: var Parser, r: PNode,
         result = commandExpr(p, result, mode)
         break
       result = namedParams(p, result, nkCall, tkParRi)
-      if result.has2Sons and result.secondSon.kind == nkExprColonExpr:
+      if result.len > 1 and result[1].kind == nkExprColonExpr:
         result.transitionSonsKind(nkObjConstr)
     of tkDot:
       # progress guaranteed
@@ -1168,7 +1160,7 @@ proc parseParamList(p: var Parser, retColon = true): PNode =
   if hasRet and p.tok.indent < 0:
     getTok(p)
     optInd(p, result)
-    result.replaceFirstSon parseTypeDesc(p)
+    result[0] = parseTypeDesc(p)
   elif not retColon and not hasParLe:
     # Mark as "not there" in order to mark for deprecation in the semantic pass:
     result = p.emptyNode
@@ -1213,9 +1205,9 @@ proc parseProcExpr(p: var Parser; isExpr: bool; kind: TNodeKind): PNode =
       params = params, name = p.emptyNode, pattern = p.emptyNode,
       genericParams = p.emptyNode, pragmas = pragmas, exceptions = p.emptyNode)
     skipComment(p, result)
-    result.replaceSon bodyPos, parseStmt(p)
+    result[bodyPos] = parseStmt(p)
   else:
-    result = newNode(if kind == nkIteratorDef: nkIteratorTy else: nkProcTy, info)
+    result = newNodeI(if kind == nkIteratorDef: nkIteratorTy else: nkProcTy, info)
     if hasSignature or pragmas.kind != nkEmpty:
       if hasSignature:
         result.add(params)
@@ -1328,7 +1320,7 @@ proc parseExpr(p: var Parser): PNode =
       result = parseFor(p)
   of tkWhen:
     nimprettyDontTouch:
-      result = parseIfOrWhenExpr(p, nkWhenStmt)
+      result = parseIfOrWhenExpr(p, nkWhenExpr)
   of tkCase:
     # Currently we think nimpretty is good enough with case expressions,
     # so it is allowed to touch them:
@@ -1401,7 +1393,7 @@ proc primary(p: var Parser, mode: PrimaryMode): PNode =
     result = primarySuffix(p, result, baseInd, mode)
 
 proc binaryNot(p: var Parser; a: PNode): PNode =
-  if p.tok.tokType == tkNot and p.tok.indent < 0:
+  if p.tok.tokType == tkNot:
     let notOpr = newIdentNodeP(p.tok.ident, p)
     getTok(p)
     optInd(p, notOpr)
@@ -1439,7 +1431,7 @@ proc parseTypeDesc(p: var Parser, fullExpr = false): PNode =
       result = newNodeP(nkObjectTy, p)
       getTok(p)
     of tkConcept:
-      result = p.emptyNode
+      result = nil
       parMessage(p, "the 'concept' keyword is only valid in 'type' sections")
     of tkVar: result = parseTypeDescKAux(p, nkVarTy, pmTypeDesc)
     of tkOut: result = parseTypeDescKAux(p, nkOutTy, pmTypeDesc)
@@ -1487,7 +1479,7 @@ proc makeCall(n: PNode): PNode =
   if n.kind in nkCallKinds:
     result = n
   else:
-    result = newNode(nkCall, n.info)
+    result = newNodeI(nkCall, n.info)
     result.add n
 
 proc postExprBlocks(p: var Parser, x: PNode): PNode =
@@ -1518,9 +1510,9 @@ proc postExprBlocks(p: var Parser, x: PNode): PNode =
       var stmtList = newNodeP(nkStmtList, p)
       stmtList.add parseStmt(p)
       # to keep backwards compatibility (see tests/vm/tstringnil)
-      if stmtList.firstSon.kind == nkStmtList: stmtList = stmtList.firstSon
+      if stmtList[0].kind == nkStmtList: stmtList = stmtList[0]
 
-      setNodeFlag stmtList, nfBlockArg
+      stmtList.flags.incl nfBlockArg
       if openingParams.kind != nkEmpty or openingPragmas.kind != nkEmpty:
         if openingParams.kind == nkEmpty:
           openingParams = newNodeP(nkFormalParams, p)
@@ -1564,7 +1556,7 @@ proc postExprBlocks(p: var Parser, x: PNode): PNode =
         eat(p, tkColon)
         nextBlock.add parseStmt(p)
 
-      setNodeFlag nextBlock, nfBlockArg
+      nextBlock.flags.incl nfBlockArg
       result.add nextBlock
 
       if nextBlock.kind in {nkElse, nkFinally}: break
@@ -1590,7 +1582,7 @@ proc parseExprStmt(p: var Parser): PNode =
     # if an expression is starting here, a simplePrimary was parsed and
     # this is the start of a command
     if p.tok.indent < 0 and isExprStart(p):
-      result = newTree(nkCommand, a.info, a)
+      result = newTreeI(nkCommand, a.info, a)
       let baseIndent = p.currInd
       while true:
         result.add(commandParam(p, isFirstParam, pmNormal))
@@ -1981,13 +1973,13 @@ proc parseRoutine(p: var Parser, kind: TNodeKind): PNode =
   else:
     result.add(p.emptyNode)
   indAndComment(p, result, maybeMissEquals)
-  let body = result.lastSon
-  if body.kind == nkStmtList and body.hasSon and body.firstSon.comment.len > 0 and body.firstSon.kind != nkCommentStmt:
+  let body = result[^1]
+  if body.kind == nkStmtList and body.len > 0 and body[0].comment.len > 0 and body[0].kind != nkCommentStmt:
     if result.comment.len == 0:
       # proc fn*(a: int): int = a ## foo
       # => moves comment `foo` to `fn`
-      result.comment = body.firstSon.comment
-      body.firstSon.comment = ""
+      result.comment = body[0].comment
+      body[0].comment = ""
     #else:
     #  assert false, p.lex.config$body.info # avoids hard to track bugs, fail early.
     # Yeah, that worked so well. There IS a bug in this logic, now what?
@@ -2021,7 +2013,7 @@ proc parseSection(p: var Parser, kind: TNodeKind,
         else:
           parMessage(p, errIdentifierExpected, p.tok)
           break
-    if not result.hasSon: parMessage(p, errIdentifierExpected, p.tok)
+    if result.len == 0: parMessage(p, errIdentifierExpected, p.tok)
   elif p.tok.tokType in {tkSymbol, tkAccent, tkParLe} and p.tok.indent < 0:
     # tkParLe is allowed for ``var (x, y) = ...`` tuple parsing
     result.add(defparser(p))
@@ -2072,7 +2064,7 @@ proc parseEnum(p: var Parser): PNode =
     if p.tok.indent >= 0 and p.tok.indent <= p.currInd or
         p.tok.tokType == tkEof:
       break
-  if not result.has2Sons:
+  if result.len <= 1:
     parMessage(p, errIdentifierExpected, p.tok)
   setEndInfo()
 
@@ -2201,8 +2193,7 @@ proc parseObject(p: var Parser): PNode =
 proc parseTypeClassParam(p: var Parser): PNode =
   let modifier =
     case p.tok.tokType
-    of tkVar: nkVarTy
-    of tkOut: nkOutTy
+    of tkOut, tkVar: nkVarTy
     of tkPtr: nkPtrTy
     of tkRef: nkRefTy
     of tkStatic: nkStaticTy
@@ -2218,7 +2209,7 @@ proc parseTypeClassParam(p: var Parser): PNode =
   setEndInfo()
 
 proc parseTypeClass(p: var Parser): PNode =
-  #| conceptParam = ('var' | 'out' | 'ptr' | 'ref' | 'static' | 'type')? symbol
+  #| conceptParam = ('var' | 'out')? symbol
   #| conceptDecl = 'concept' conceptParam ^* ',' (pragma)? ('of' typeDesc ^* ',')?
   #|               &IND{>} stmt
   result = newNodeP(nkTypeClassTy, p)
@@ -2296,7 +2287,7 @@ proc parseTypeDef(p: var Parser): PNode =
   setEndInfo()
 
 proc parseVarTuple(p: var Parser): PNode =
-  #| varTupleLhs = '(' optInd (identWithPragma / varTupleLhs) ^+ comma optPar ')' (':' optInd typeDescExpr)?
+  #| varTupleLhs = '(' optInd (identWithPragma / varTupleLhs) ^+ comma optPar ')'
   #| varTuple = varTupleLhs '=' optInd expr
   result = newNodeP(nkVarTuple, p)
   getTok(p)                   # skip '('
@@ -2313,14 +2304,9 @@ proc parseVarTuple(p: var Parser): PNode =
     if p.tok.tokType != tkComma: break
     getTok(p)
     skipComment(p, a)
+  result.add(p.emptyNode)         # no type desc
   optPar(p)
   eat(p, tkParRi)
-  if p.tok.tokType == tkColon:
-    getTok(p)
-    optInd(p, result)
-    result.add(parseTypeDesc(p, fullExpr = true))
-  else:
-    result.add(p.emptyNode)         # no type desc
   setEndInfo()
 
 proc parseVariable(p: var Parser): PNode =
@@ -2332,7 +2318,7 @@ proc parseVariable(p: var Parser): PNode =
     optInd(p, result)
     result.add(parseExpr(p))
   else: result = parseIdentColonEquals(p, {withPragma, withDot})
-  result.setLastSon postExprBlocks(p, result.lastSon)
+  result[^1] = postExprBlocks(p, result[^1])
   indAndComment(p, result)
   setEndInfo()
 
@@ -2351,8 +2337,8 @@ proc parseConstant(p: var Parser): PNode =
   eat(p, tkEquals)
   optInd(p, result)
   #add(result, parseStmtListExpr(p))
-  let a = parseExpr(p)
-  result.add postExprBlocks(p, a)
+  result.add(parseExpr(p))
+  result[^1] = postExprBlocks(p, result[^1])
   indAndComment(p, result)
   setEndInfo()
 
@@ -2377,7 +2363,7 @@ proc parseStmtPragma(p: var Parser): PNode =
   result = parsePragma(p)
   if p.tok.tokType == tkColon and p.tok.indent < 0:
     let a = result
-    result = newNode(nkPragmaBlock, a.info)
+    result = newNodeI(nkPragmaBlock, a.info)
     getTok(p)
     skipComment(p, result)
     result.add a
@@ -2527,11 +2513,27 @@ proc parseStmt(p: var Parser): PNode =
           if err and p.tok.tokType == tkEof: break
   setEndInfo()
 
+proc parseAll(p: var Parser): PNode =
+  ## Parses the rest of the input stream held by the parser into a PNode.
+  result = newNodeP(nkStmtList, p)
+  while p.tok.tokType != tkEof:
+    p.hasProgress = false
+    var a = complexOrSimpleStmt(p)
+    if a.kind != nkEmpty and p.hasProgress:
+      result.add(a)
+    else:
+      parMessage(p, errExprExpected, p.tok)
+      # bugfix: consume a token here to prevent an endless loop:
+      getTok(p)
+    if p.tok.indent != 0:
+      parMessage(p, errInvalidIndentation)
+  setEndInfo()
+
 proc checkFirstLineIndentation*(p: var Parser) =
   if p.tok.indent != 0 and tsLeading in p.tok.spacing:
     parMessage(p, errInvalidIndentation)
 
-proc parseTopLevelStmt*(p: var Parser): PNode =
+proc parseTopLevelStmt(p: var Parser): PNode =
   ## Implements an iterator which, when called repeatedly, returns the next
   ## top-level statement or emptyNode if end of stream.
   result = p.emptyNode
@@ -2561,16 +2563,6 @@ proc parseTopLevelStmt*(p: var Parser): PNode =
       break
   setEndInfo()
 
-proc parseAll*(p: var Parser): PNode =
-  ## Parses the rest of the input stream held by the parser into a PNode.
-  result = newNodeP(nkStmtList, p)
-  while true:
-    let nextStmt = p.parseTopLevelStmt()
-    if nextStmt.kind == nkEmpty:
-      break
-    result &= nextStmt
-  setEndInfo()
-
 proc parseString*(s: string; cache: IdentCache; config: ConfigRef;
                   filename: string = ""; line: int = 0;
                   errorHandler: ErrorHandler = nil): PNode =
@@ -2581,7 +2573,7 @@ proc parseString*(s: string; cache: IdentCache; config: ConfigRef;
   var stream = llStreamOpen(s)
   stream.lineOffset = line
 
-  var p = Parser()
+  var p: Parser
   p.lex.errorHandler = errorHandler
   openParser(p, AbsoluteFile filename, stream, cache, config)
 

compiler/passes.nim

@@ -165,13 +165,13 @@ proc compileModule*(graph: ModuleGraph; fileIdx: FileIndex; flags: TSymFlags, fr
 
   template processModuleAux(moduleStatus) =
     onProcessing(graph, fileIdx, moduleStatus, fromModule = fromModule)
-    var s: PLLStream = nil
+    var s: PLLStream
     if sfMainModule in flags:
       if graph.config.projectIsStdin: s = stdin.llStreamOpen
       elif graph.config.projectIsCmd: s = llStreamOpen(graph.config.cmdInput)
     discard processModule(graph, result, idGeneratorFromModule(result), s)
   if result == nil:
-    var cachedModules: seq[FileIndex] = @[]
+    var cachedModules: seq[FileIndex]
     result = moduleFromRodFile(graph, fileIdx, cachedModules)
     let filename = AbsoluteFile toFullPath(graph.config, fileIdx)
     if result == nil:
@@ -185,7 +185,7 @@ proc compileModule*(graph: ModuleGraph; fileIdx: FileIndex; flags: TSymFlags, fr
       partialInitModule(result, graph, fileIdx, filename)
     for m in cachedModules:
       registerModuleById(graph, m)
-      replayStateChanges(graph.packed.pm[m.int].module, graph)
+      replayStateChanges(graph.packed[m.int].module, graph)
       replayGenericCacheInformation(graph, m.int)
   elif graph.isDirty(result):
     result.flags.excl sfDirty