Theoretical Benefits / Plans:
- Typed assembler-like language.
- Allows for a CPS transformation.
- Can replace the existing C backend by a new C backend.
- Can replace the VM.
- Can do more effective "not nil" checking and static array bounds
checking.
- Can be used instead of the DFA.
- Easily translatable to LLVM.
- Reasonably easy to produce native code from.
- Tiny memory consumption. No pointers, no cry.
**In very early stages of development.**
Todo:
- [x] Map Nim types to IR types.
- [ ] Map Nim AST to IR instructions:
- [x] Map bitsets to bitops.
- [ ] Implement string cases.
- [ ] Implement range and index checks.
- [x] Implement `default(T)` builtin.
- [x] Implement multi string concat.
- [ ] Write some analysis passes.
- [ ] Write a backend.
- [x] Integrate into the compilation pipeline.
in `std/nre`
```nim
proc initRegex(pattern: string, flags: int, study = true): Regex =
new(result, destroyRegex)
```
gives incorrect warnings like
```
C:\Users\blue\Documents\Nim\lib\impure\nre.nim(252, 6) Error: A custom '=destroy' hook which takes a 'var T' parameter is deprecated; it should take a 'T' parameter [Deprecated
```
Since they are integer types, by mean of allowing cast integer to enums
in VM, we can suppress some enum warnings in the stdlib in the unified
form, namely using a cast expression.
This would be handy for making terminal apps which display content below
the prompt (e.g. `fzf` does this).
Need to test it on windows before I remove "draft" status.
---------
Co-authored-by: Matt Rixman <MatrixManAtYrService@users.noreply.github.com>
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
I came across this sentence in the Nim Manual and couldn't make sense of
it. I believe this is the correct fix for the sentence.
---------
Co-authored-by: ringabout <43030857+ringabout@users.noreply.github.com>
fixes#22753
## Future work
We should turn all the error nodes into nodes of a nkError kind, which
could be a industrious task. But perhaps we can add a special treatment
for error nodes to make the transition smooth.
I couldn't find any documentation on the syntax for --hint:X:on|off with
`nimscript` except in [this old forum
post](https://forum.nim-lang.org/t/8526#55236).
The goal of this PR is to make `typeRel` accurate to it's definition for
generics:
```
# 3) When used with two type classes, it will check whether the types
# matching the first type class (aOrig) are a strict subset of the types matching
# the other (f). This allows us to compare the signatures of generic procs in
# order to give preferrence to the most specific one:
```
I don't want this PR to break any code, and I want to preserve all of
Nims current behaviors. I think that making this more accurate will help
serve as ground work for the future. It may not be possible to not break
anything but this is my attempt.
So that it is understood, this code was part of another PR (#22143) but
that problem statement only needed this change by extension. It's more
organized to split two problems into two PRs and this issue, being
non-breaking, should be a more immediate improvement.
---------
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
- `copyFile` allows to specify `bufferSize` instead of hardcoded wrong
value. Tiny diff.
# Performance
- 1200% Performance improvement.
# Check it yourself
Execute:
```bash
for i in $(seq 0 10); do
bs=$((1024*2**$i))
printf "%7s Kb\t" $bs
timeout --foreground -sINT 2 dd bs=$bs if=/dev/zero of=/dev/null 2>&1 | sed -n 's/.* \([0-9.,]* [GM]B\/s\)/\1/p'
done
```
(This script can be ported to PowerShell for Windows I guess, it works
in Windows MinGW Bash anyways).
# Stats
- Hardcoded `8192` or `8000` Kb bufferSize gives `5` GB/s.
- Setting `262144` Kb bufferSize gives `65` GB/s (script suggestion).
---------
Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
- Support multiple OS Bisects (Linux, Windows, MacOS).
- Install Valgrind only if needed to speed up non-Valgrind builds.
- Valgrind+MacOS bisect support.
- Show IR of OK repro code samples.
- YAML only, tiny diff.
#### New features
- Bisect bugs that only reproduce on Windows and OSX.
#### See also
- https://github.com/juancarlospaco/nimrun-action/pull/10
```nim
echo newString(8)
```
results in:
```
D:\User\test.js:25
var code_33556944 = c_33556931.toString(16);
^
TypeError: Cannot read properties of undefined (reading 'toString')
at toJSStr (D:\User\test.js:25:50)
at rawEcho (D:\User\test.js:70:16)
at Object.<anonymous> (D:\User\test.js:101:1)
at Module._compile (node:internal/modules/cjs/loader:1095:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1147:10)
at Module.load (node:internal/modules/cjs/loader:975:32)
at Function.Module._load (node:internal/modules/cjs/loader:822:12)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
at node:internal/main/run_main_module:17:47
Node.js v17.0.1
Error: execution of an external program failed: '"C:\Program Files\nodejs\node.exe" --unhandled-rejections=strict D:\User\test.js'
```
