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445d46dd9eb6cc20e87994a86e2a342a712a0df7
Nim/compiler
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Corey Leavitt 445d46dd9e fixes #26092; restore enclosing cast block state when a nested cast block exits (#26093) 
`unapplyBlockContext` reset `inEnforcedGcSafe` and
`inEnforcedNoSideEffects` to false whenever a `{.cast(gcsafe).}` or
`{.cast(noSideEffect).}` block ended. When such a block is nested inside
another block of the same cast, the inner block's exit switched
enforcement back on for the rest of the enclosing block, so statements
lexically inside the outer cast were rejected.

The fix saves both flags in `PragmaBlockContext` when the block context
is created and restores the saved values on exit. That matches how every
other piece of block state there (`locked`, `exc`, `tags`, `forbids`) is
already handled; these two bools were the only ones reset to a constant
instead of restored.

No change for non-nested blocks: entering from the non-enforced state
saves false, so exit still clears the flag. A statement after the outer
block is still rejected as before.

Test covers nested `cast(gcsafe)` and nested `cast(noSideEffect)`.
`tests/effects` passes unchanged (49/49, same as stock).

(cherry picked from commit f4e8e04cd0)
2026-08-10 08:11:59 +02:00
..
ic
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
plugins
Adds support for custom ASTs in the Nim parser (#23417)
2024-03-18 20:27:00 +01:00
aliasanalysis.nim
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
aliases.nim
type refactor: part 4 (#23077)
2023-12-15 10:20:57 +01:00
ast.nim
fixes #25851; ensure --panics:on does not skip nimErr_ check after closure calls (#25855)
2026-06-08 08:46:56 +02:00
astalgo.nim
bring back id table algorithm instead of std table [backport:2.2] (#24930)
2025-05-06 16:04:43 +02:00
astdef.nim
reduce imports (#25398)
2026-01-09 09:03:51 +01:00
astmsgs.nim
fixes #23494; Wrong type in object construction error message (#23504)
2024-04-16 12:46:59 +02:00
astyaml.nim
astyaml: formatting fixes (#25897)
2026-06-12 10:26:34 +02:00
bitsets.nim
NIR: Nim intermediate representation (#22777)
2023-10-11 17:44:14 +02:00
btrees.nim
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
cbuilder.nim
use cbuilder for tuple/object generation (#24145)
2024-09-27 11:12:39 +02:00
ccgcalls.nim
conv needs to be picky about aliases and introduces a temp for addr conv (#24818)
2025-04-02 09:42:57 +02:00
ccgexprs.nim
fixes #26019; deepCopy should not be allowed for non-copyable type (#26030)
2026-08-06 09:14:45 +02:00
ccgliterals.nim
store full definition AST for consts, fix noRewrite (#20115)
2022-09-28 15:05:01 +02:00
ccgmerge_unused.nim
removed unused sections in codegen (#20976)
2022-11-30 21:51:13 +01:00
ccgreset.nim
fixes #25205 #14873; resets importc obj with nimZeroMem in specializeResetT for refc (#25207)
2025-10-08 08:33:16 +02:00
ccgstmts.nim
fixes ReraiseDefect after typeless except: + finally: (cpp backend) (#25777)
2026-05-29 08:21:52 +02:00
ccgthreadvars.nim
refactor: The popular 'r' field is now named 'snippet' (#23829)
2024-07-12 15:23:09 +02:00
ccgtrav.nim
refactor: The popular 'r' field is now named 'snippet' (#23829)
2024-07-12 15:23:09 +02:00
ccgtypes.nim
fix #25508; ignores void types in the backends (#25550)
2026-03-09 10:47:45 +01:00
ccgutils.nim
Revert "implements internal sink copy (#24747)"
2025-03-18 08:49:45 +01:00
cgen.nim
fixes #25387; embedsrc breaks with Line Continuation (#25388)
2026-01-09 08:49:03 +01:00
cgendata.nim
fixes finally being skipped when except T as e re-raises (cpp backend) (#25775)
2026-05-08 14:55:56 +02:00
cgmeth.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
closureiters.nim
fix: exception leak in closure iterator typed except branches (#23615) (#26034)
2026-08-06 09:15:11 +02:00
cmdlinehelper.nim
fixes #23429; rework --verbosity with warnings/hints (#23441)
2024-03-28 11:04:12 +01:00
commands.nim
fix: implicit imports drop std/ prefix (#25780)
2026-05-08 15:17:50 +02:00
compiler.nimble
Create compiler and nimsuggest packages (#22118)
2023-06-18 16:06:14 +02:00
concepts.nim
reduce imports (#25398)
2026-01-09 09:03:51 +01:00
condsyms.nim
fixes #24706; Warn on implicit range downsizing (#25451)
2026-02-02 07:59:57 +01:00
debuginfo.nim
happy new year
2017-01-07 22:35:09 +01:00
debugutils.nim
Extend and document compiler debugging utilities (#19841)
2022-06-10 20:40:08 +02:00
depends.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
deps.nim
reduce imports (#25398)
2026-01-09 09:03:51 +01:00
dfa.nim
fixes lastRead uses the when nimvm branch (#24834)
2025-04-02 09:43:12 +02:00
docgen2.nim
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
docgen.nim
fixes #25670; docgen: cmpDecimalsIgnoreCase max() used wrong index for b (#25669)
2026-03-30 15:09:59 +02:00
enumtostr.nim
account for invalid data in enum $ on arc/orc (#24886)
2025-04-18 12:50:05 +02:00
errorhandling.nim
IC: progress and refactorings (#22961)
2023-11-20 21:12:13 +01:00
evalffi.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
evaltempl.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
expanddefaults.nim
remove fauxMatch for tyFromExpr, remove tyProxy and tyUnknown aliases (#24018)
2024-08-28 20:46:36 +02:00
extccomp.nim
Create Mac app bundle for GUI apps on macOS when --app:gui is used (#25042)
2025-07-17 13:39:17 +02:00
filter_tmpl.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
filters.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
gorgeimpl.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
guards.nim
fixes #22791; ProveField warning with nested case object (#25774)
2026-05-28 09:22:36 +02:00
hlo.nim
Fixes #25304 proper test for hlo recursion limit (#25305)
2025-11-22 13:33:01 +01:00
idents.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
importer.nim
fix: implicit imports drop std/ prefix (#25780)
2026-05-08 15:17:50 +02:00
index.nim
walkDirRecFilter, update doc CI filter, compiler/index.nim for docs + various other fixes (#14501)
2020-06-01 19:21:41 +02:00
injectdestructors.nim
fixes #26010; Double destroy with {.cursor.} (#26031)
2026-08-06 09:16:19 +02:00
installer.ini
fixes nightlies due to UB errors; increase maxCPU hard limits (#25219)
2025-10-14 11:37:24 +02:00
int128.nim
fixes yet another strictdefs bug (#23069)
2023-12-15 08:13:25 +01:00
isolation_check.nim
docs: fix typos (#24573)
2025-01-15 10:21:20 +01:00
jsgen.nim
js: cursor inference to elide nimCopy for safe value aliases (#25948)
2026-07-06 08:44:50 +02:00
jstypes.nim
fixes #25043: js tyUserTypeClass internal error (#25044)
2025-07-17 13:39:41 +02:00
lambdalifting.nim
Fix inconsistent env type with nested procs in iterators (#21242) (#25699)
2026-04-07 08:34:55 +02:00
layeredtable.nim
reduce imports (#25398)
2026-01-09 09:03:51 +01:00
layouter.nim
fix #20078: nimpretty --indent applies to keepIndents regions (#25985)
2026-08-06 09:19:30 +02:00
lexer.nim
fixes #25821; unary minus off by one mistake [backport] (#25823)
2026-05-22 08:57:23 +02:00
liftdestructors.nim
fixes #25687; optimizes seq assignment for orc (#25689)
2026-04-03 12:47:11 +02:00
liftlocals.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
lineinfos.nim
fixes-25655; defining >= operator generates compile error (#25787)
2026-06-08 14:48:42 +02:00
linter.nim
fixes #19831; add --styleCheck:warning (#25456)
2026-01-26 09:13:17 +01:00
llstream.nim
repl: support eof, define object with fields (#24784)
2025-03-25 09:44:55 +01:00
lookups.nim
fixes #25693; continues the bugfix story (#25876)
2026-06-09 06:24:20 +02:00
lowerings.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
macrocacheimpl.nim
IC: next steps (#16632)
2021-01-12 09:36:51 +01:00
magicsys.nim
fix compiler crash with uncheckedAssign and range/distinct discrims [backport] (#25585)
2026-03-09 10:13:04 +01:00
main.nim
remove nir; succeeded by nif (#23809)
2024-07-09 09:29:45 +02:00
mangleutils.nim
apply the new mangle algorithm to JS backend for parameters and procs (#23476)
2024-04-05 08:54:48 +02:00
modulegraphs.nim
fixes #26023; incorrect sink requires a copy (#26028)
2026-08-06 09:19:22 +02:00
modulepaths.nim
make mangled module names shorter (#24976)
2025-06-06 08:32:58 +02:00
modules.nim
adds a getter/setter for owner (#24318)
2025-01-14 07:45:59 +01:00
msgs.nim
fixes #19831; add --styleCheck:warning (#25456)
2026-01-26 09:13:17 +01:00
nilcheck.nim
fixes-25655; defining >= operator generates compile error (#25787)
2026-06-08 14:48:42 +02:00
nim.cfg
enable --warning:ImplicitRangeConversion (#25477)
2026-02-26 17:32:51 +01:00
nim.nim
fixes #23848; The comand nim gendepend defaults to ORC (#23851)
2024-07-17 18:25:19 +02:00
nimblecmd.nim
fixes yet another strictdefs bug (#23069)
2023-12-15 08:13:25 +01:00
nimconf.nim
add srcDir variable to nim.cfg (#24919)
2025-10-27 08:51:00 +01:00
nimeval.nim
fixes addr/hiddenAddr in strictdefs (#23477)
2024-04-10 14:41:16 +02:00
nimlexbase.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
nimpaths.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
nimsets.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
nodejs.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
nodekinds.nim
opensym as node kind + fixed experimental switch (#23892)
2024-08-12 15:33:26 +02:00
nversion.nim
warn on set types bigger than max size, default to 0..255 for int literals (#21659)
2023-04-17 20:55:22 +02:00
optimizer.nim
fixes #24806; don't elide wasMoved when syms are used in blocks (#24831)
2025-04-04 10:08:30 +02:00
options.nim
adds wasm64 (Memory64) as a first-class target (#25900)
2026-06-12 10:27:15 +02:00
packagehandling.nim
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
packages.nim
make linter use lineinfo to check originating package (#24270)
2025-01-14 07:34:32 +01:00
parampatterns.nim
fixes #23949; cannot return lent expression from conditionals like case (#25190)
2025-09-24 08:54:39 +02:00
parser.nim
Improve error message for keywords as parameters (#25052)
2025-07-17 13:39:26 +02:00
passaux.nim
test removing dollar for objects out of system (#20242)
2022-08-24 09:44:16 +02:00
passes.nim
improve passes.nim (#24376)
2025-01-14 07:51:55 +01:00
pathutils.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
patterns.nim
clean up opensym encounters in compiler (#24866)
2025-04-14 10:52:41 +02:00
pipelines.nim
Allow specifiying path to use for stdin error messages (#24595)
2025-04-14 10:52:50 +02:00
pipelineutils.nim
replaces implicit passes array registed at runtime with explicit function calls; simplify compilation pipeline (#21444)
2023-03-03 07:36:38 +01:00
platform.nim
adds wasm64 (Memory64) as a first-class target (#25900)
2026-06-12 10:27:15 +02:00
pluginsupport.nim
refactoring: fewer global variables
2018-05-27 19:19:12 +02:00
pragmas.nim
allow setting arbitrary size for importc types (#24868)
2025-04-14 10:53:01 +02:00
prefixmatches.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
procfind.nim
fixes addr/hiddenAddr in strictdefs (#23477)
2024-04-10 14:41:16 +02:00
pushpoppragmas.nim
fixes push warnings for sempass2 (#23603)
2024-09-03 09:19:52 +02:00
readme.md
clean up the documentation (#22196)
2023-07-02 22:36:05 +02:00
renderer.nim
fixes whitespace related endless loop in renderer.nim (#25750)
2026-04-16 19:44:36 +02:00
renderverbatim.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
reorder.nim
clean up opensym encounters in compiler (#24866)
2025-04-14 10:52:41 +02:00
rodutils.nim
NIR: C codegen additions (#22914)
2023-11-06 18:33:28 +01:00
ropes.nim
replaces doAssert false with raiseAssert for unreachable branches, which works better with strictdefs (#22436)
2023-08-10 14:26:40 +02:00
saturate.nim
fix warnings for deprecated low and high (#15291)
2020-09-11 01:04:07 +02:00
scriptconfig.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
sem.nim
fixes #25945; cannot map the empty seq type to a C type (#25954)
2026-07-06 08:42:41 +02:00
semcall.nim
fixes #25290; tempalte overload scope dupe (#25308)
2026-04-13 12:06:27 +02:00
semdata.nim
fixes #25693; continues the bugfix story (#25876)
2026-06-09 06:24:20 +02:00
semexprs.nim
fixes #26045; #26046; when nimvm leak push options (#26047)
2026-08-06 09:18:45 +02:00
semfields.nim
fixes #24339; underscores used with fields and fieldPairs (#24341)
2025-03-03 14:10:49 +01:00
semfold.nim
fixes #19983; implements bitmasked bitshifting for all backends (#25390)
2026-01-12 08:48:55 +01:00
semgnrc.nim
fixes #20811; Nested proc with inner being generic cannot access parameters of outer proc (#25837)
2026-06-08 14:48:32 +02:00
seminst.nim
generally disallow recursive structural types, check proc param types (#24893)
2025-04-21 19:09:45 +02:00
semmacrosanity.nim
fixes #24361 (#25179)
2025-09-22 08:47:23 +02:00
semmagic.nim
fixes #26010; Double destroy with {.cursor.} (#26031)
2026-08-06 09:16:19 +02:00
semobjconstr.nim
fixes #25123; fixes #11862; Case object from compileTime proc unable to be passed as static param (#25224)
2025-10-17 09:24:11 +02:00
semparallel.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
sempass2.nim
fixes #26092; restore enclosing cast block state when a nested cast block exits (#26093)
2026-08-10 08:11:59 +02:00
semstmts.nim
fixes-25655; defining >= operator generates compile error (#25787)
2026-06-08 14:48:42 +02:00
semstrictfuncs.nim
alternative, much simpler algorithm for strict func checking (#21066)
2022-12-11 16:58:50 +01:00
semtempl.nim
don't warn/error symbols in semGenericStmt/templates (#24907)
2025-05-05 08:19:11 +02:00
semtypes.nim
unwrap typedesc in semSet to enable stuff like set[T.distinctBase] (#25924)
2026-08-06 09:17:58 +02:00
semtypinst.nim
fixes #25509; removes void fields from a named tuple type (#25515)
2026-02-26 17:34:42 +01:00
sighashes.nim
Fix #25883 tuple sighash collision (#25889)
2026-07-18 10:22:47 +02:00
sigmatch.nim
fixes #25942 #25938; type inference for static container type (#25989)
2026-08-06 09:18:57 +02:00
sinkparameter_inference.nim
IC: progress and refactorings (#22961)
2023-11-20 21:12:13 +01:00
sizealignoffsetimpl.nim
fixes #25885; incompleteStruct ignored without importc (#25898)
2026-06-15 08:01:21 +02:00
sourcemap.nim
chore: fix some typos (#23412)
2024-03-16 08:35:18 +08:00
spawn.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
suggest.nim
makes DuplicateModuleImport back to an error (#25178)
2025-09-22 08:48:48 +02:00
suggestsymdb.nim
NimSuggest: Fix for the inlay exception hints with generic procs (#23610)
2025-07-19 08:17:30 +02:00
syntaxes.nim
fixes addr/hiddenAddr in strictdefs (#23477)
2024-04-10 14:41:16 +02:00
tccgen.nim
replaces doAssert false with raiseAssert for unreachable branches, which works better with strictdefs (#22436)
2023-08-10 14:26:40 +02:00
transf.nim
fixes #25725; environment misses: s with iterator (#25828)
2026-06-08 14:50:54 +02:00
trees.nim
fixes #26010; Double destroy with {.cursor.} (#26031)
2026-08-06 09:16:19 +02:00
treetab.nim
Align treetab hash with equivalence (#25354)
2025-12-15 20:29:49 +01:00
typeallowed.nim
fixes #25677; fixes #25678; typeAllowedAux to improve flag handling (#25684)
2026-03-30 15:10:17 +02:00
types.nim
fixes #25796; fixes procParamTypeRel to ensure backend type consistency (#25798)
2026-05-29 08:25:57 +02:00
typesrenderer.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
varpartitions.nim
fixes #26023; incorrect sink requires a copy (#26028)
2026-08-06 09:19:22 +02:00
vm.nim
fixes #25446; [FieldDefect] with static: discard cast[pointer](default(pointer)) (#25448)
2026-01-26 09:12:59 +01:00
vmconv.nim
Types: Refactorings; step 1 (#23055)
2023-12-12 16:54:50 +01:00
vmdef.nim
fixes #18367 and #21222; using quote inside static block (#25907)
2026-06-15 08:01:11 +02:00
vmdeps.nim
Fix getTypeImpl not returning defaults (#25592)
2026-03-10 09:30:31 +01:00
vmgen.nim
fixes #26000; Cannot add members to enum-indexed array of seqs at com… (#26013)
2026-08-06 09:11:44 +02:00
vmhooks.nim
replaces doAssert false with raiseAssert for unreachable branches, which works better with strictdefs (#22436)
2023-08-10 14:26:40 +02:00
vmmarshal.nim
fixes addr/hiddenAddr in strictdefs (#23477)
2024-04-10 14:41:16 +02:00
vmops.nim
fixes #24941; missing < (less than), cmp for cstring (#24942)
2025-05-12 14:20:32 +02:00
vmprofiler.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
vtables.nim
fixes #24476; remove proc type cast if they are same types for backends (#24480)
2025-01-14 12:24:00 +01:00
wordrecg.nim
Asm syntax pragma (#23119)
2023-12-25 07:12:54 +01:00

readme.md

Nim Compiler

  • This directory contains the Nim compiler written in Nim.
  • Note that this code has been translated from a bootstrapping version written in Pascal.
  • So the code is not a poster child of good Nim code.

See Internals of the Nim Compiler for more information.