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7a82c5920c46fa7a3393ebdecc54716cb1015366
Nim/compiler
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ringabout 7a82c5920c fixes #25677; fixes #25678; typeAllowedAux to improve flag handling (#25684) 
fixes #25677;
fixes #25678

This pull request introduces both a bug fix to the type checking logic
in the compiler and new test cases for lent types involving procedures
and tables. The most significant change is a refinement in how type
flags are handled for procedure and function types in the compiler,
which improves correctness in type allowance checks. Additionally, the
test suite is expanded to cover more complex scenarios with lent types
and table lookups.

**Compiler improvements:**

* Refined the handling of type flags in `typeAllowedAux` for procedure
and function types by introducing `innerFlags`, which removes certain
flags (`taObjField`, `taTupField`, `taIsOpenArray`) before recursing
into parameter and return types. This ensures more accurate type
checking and prevents inappropriate flag propagation.

**Testing enhancements:**

* Added new test blocks in `tests/lent/tlents.nim` to cover lent
procedure types stored in objects and used as table values, including a
function that retrieves such procedures from a table by key.
* Introduced a test case for an object containing a lent procedure
field, ensuring correct behavior when accessing and using these fields.
2026-03-30 15:09:11 +02:00
..
ic
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +01:00
plugins
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +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
ast2nif.nim
fixes global tuple unpacking for nim ic (#25624)
2026-03-23 09:35:30 +01:00
ast.nim
fixes #25611; t.state != Sealed (#25622)
2026-03-19 21:25:11 +01:00
astalgo.nim
IC: progress (#25314)
2025-12-01 22:59:12 +01:00
astdef.nim
fixes compiling newSeq call with nim ic generates compile error (#25603)
2026-03-15 07:57:16 +01:00
astmsgs.nim
fixes #23494; Wrong type in object construction error message (#23504)
2024-04-16 12:46:59 +02:00
astyaml.nim
refactor: The popular 'r' field is now named 'snippet' (#23829)
2024-07-12 15:23:09 +02:00
bitsets.nim
NIR: Nim intermediate representation (#22777)
2023-10-11 17:44:14 +02:00
btrees.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
cbuilderbase.nim
fixes nightlies failures (#24456)
2024-11-19 08:51:54 +01:00
cbuilderdecls.nim
fixes #25405; initialization for objects with opaque importc fields (#25406)
2026-01-05 15:21:59 +01:00
cbuilderexprs.nim
cbuilder: use constants for type names, some cleanups (#24438)
2024-11-18 17:34:37 +01:00
cbuilderstmts.nim
cbuilder: use constants for type names, some cleanups (#24438)
2024-11-18 17:34:37 +01:00
ccgcalls.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
ccgexprs.nim
properly codegen structs on deref [backport:2.2] (#25600)
2026-03-13 17:01:21 +01:00
ccgliterals.nim
YRC: threadsafe cycle collection for Nim (#25495)
2026-02-10 00:04:11 +01:00
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)
2025-10-06 21:55:31 +02:00
ccgstmts.nim
IC: code generation progress (#25379)
2025-12-29 00:20:33 +01:00
ccgthreadvars.nim
cbuilder: use constants for type names, some cleanups (#24438)
2024-11-18 17:34:37 +01:00
ccgtrav.nim
cbuilder: use constants for type names, some cleanups (#24438)
2024-11-18 17:34:37 +01:00
ccgtypes.nim
fixes: replace ensureMutable with backendEnsureMutable in ccgtypes (#25640)
2026-03-24 11:49:06 +08:00
ccgutils.nim
implements internal sink copy (#24747)
2025-03-10 11:20:44 +01:00
cgen.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
cgendata.nim
IC: code generation progress (#25379)
2025-12-29 00:20:33 +01:00
cgmeth.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
closureiters.nim
fixes #25596 (#25609)
2026-03-16 16:56:18 +01:00
cmdlinehelper.nim
fixes #23429; rework --verbosity with warnings/hints (#23441)
2024-03-28 11:04:12 +01:00
commands.nim
fixes #25671; commands: fix --maxLoopIterationsVM positive check (#25672)
2026-03-27 10:19:35 +01:00
compiler.nimble
Create compiler and nimsuggest packages (#22118)
2023-06-18 16:06:14 +02:00
concepts.nim
reduce imports (#25398)
2025-12-31 13:33:57 +01:00
condsyms.nim
fixes #24706; Warn on implicit range downsizing (#25451)
2026-02-01 17:06:33 +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
IC: remember which modules are from the NIF cache (#25443)
2026-01-22 04:26:20 +01:00
dfa.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
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)
2026-03-27 10:20:10 +01:00
enumtostr.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
errorhandling.nim
IC: progress and refactorings (#22961)
2023-11-20 21:12:13 +01:00
evalffi.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
evaltempl.nim
IC: progress (#25344)
2025-12-11 18:22:38 +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)
2025-07-14 23:14:06 +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
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
hlo.nim
Fixes #25304 proper test for hlo recursion limit (#25305)
2025-11-21 21:26:43 +01:00
idents.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
importer.nim
IC: remember which modules are from the NIF cache (#25443)
2026-01-22 04:26:20 +01:00
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 #24746 (#25587)
2026-03-07 15:10:01 +01:00
inliner.nim
IC progress (#25283)
2025-11-25 12:49:23 +01:00
installer.ini
fixes nightlies due to UB errors; increase maxCPU hard limits (#25219)
2025-10-13 13:47:06 +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)
2024-12-27 19:42:18 +01:00
jsgen.nim
fix #25508; ignores void types in the backends (#25550)
2026-03-05 23:08:51 +01:00
jstypes.nim
fixes #25043: js tyUserTypeClass internal error (#25044)
2025-07-14 23:15:44 +02:00
lambdalifting.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
layeredtable.nim
reduce imports (#25398)
2025-12-31 13:33:57 +01:00
layouter.nim
nimpretty: check the rendered AST for wrong output (#23057)
2023-12-13 10:39:10 +01:00
lexer.nim
fixes #19831; add --styleCheck:warning (#25456)
2026-01-23 22:50:00 +01:00
liftdestructors.nim
yrc progress (#25534)
2026-02-23 13:39:55 +01:00
liftlocals.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
lineinfos.nim
See discussion at https://github.com/nim-lang/Nim/pull/25602 . (#25612)
2026-03-19 07:39:18 +01:00
linter.nim
fixes #19831; add --styleCheck:warning (#25456)
2026-01-23 22:50:00 +01:00
llstream.nim
repl: support eof, define object with fields (#24784)
2025-03-25 07:41:17 +01:00
lookups.nim
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +01:00
lowerings.nim
IC: progress (#25344)
2025-12-11 18:22:38 +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)
2026-03-07 07:39:57 +01:00
main.nim
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +01:00
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
implements EnumToStrEntry for nim ic (#25614)
2026-03-19 07:35:24 +01:00
modulepaths.nim
IC: progress (#25420)
2026-01-09 13:10:04 +01:00
modules.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
msgs.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
nifbackend.nim
fixes #25635; registers module suffix correctly (#25645)
2026-03-24 21:34:46 +08:00
nifgen.nim
fixes #25488; Strings can be compared against nil (#25489)
2026-02-07 20:46:50 +01:00
nilcheck.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
nim.cfg
enable --warning:ImplicitRangeConversion (#25477)
2026-02-24 09:40:21 +01:00
nim.nim
IC: run nifmake automatically (#25415)
2026-01-07 13:45:26 +01:00
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)
2025-10-23 09:05:05 +02:00
nimeval.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
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
IC: progress (#25344)
2025-12-11 18:22:38 +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)
2025-04-03 12:54:00 +02:00
options.nim
YRC: threadsafe cycle collection for Nim (#25495)
2026-02-10 00:04:11 +01:00
packagehandling.nim
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
packages.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
parampatterns.nim
fixes #23949; cannot return lent expression from conditionals like case (#25190)
2025-09-24 06:29:57 +02:00
parser.nim
Improve error message for keywords as parameters (#25052)
2025-07-14 23:15:02 +02:00
passaux.nim
test removing dollar for objects out of system (#20242)
2022-08-24 09:44:16 +02:00
passes.nim
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +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)
2025-04-12 08:39:11 +02:00
pipelines.nim
IC: progress (#25453)
2026-01-24 06:07:41 +01:00
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
fixes nightlies due to UB errors; increase maxCPU hard limits (#25219)
2025-10-13 13:47:06 +02:00
pluginsupport.nim
refactoring: fewer global variables
2018-05-27 19:19:12 +02:00
pragmas.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
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
IC: progress (#25453)
2026-01-24 06:07:41 +01:00
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)
2025-04-12 08:39:11 +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
YRC: threadsafe cycle collection for Nim (#25495)
2026-02-10 00:04:11 +01:00
sem.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
semcall.nim
fixes #25262; proc v[T: typedesc]() = discard / v[0]() compiles even though 0 isn't a typedesc (#25558)
2026-02-28 23:01:09 +01:00
semdata.nim
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +01:00
semexprs.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
semfields.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semfold.nim
Do not directly cast int128 to uint64 in semfold (#25396)
2025-12-30 23:09:01 +01:00
semgnrc.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
seminst.nim
Refactoring #25302; don't store procedure's parameter types to PType.sonsImpl (#25351)
2025-12-26 21:59:38 +01:00
semmacrosanity.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semmagic.nim
yrc progress (#25534)
2026-02-23 13:39:55 +01:00
semobjconstr.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semparallel.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
sempass2.nim
allows implicitRangeConvs for literals (#25542)
2026-02-25 19:10:00 +01:00
semstmts.nim
YRC: threadsafe cycle collection for Nim (#25495)
2026-02-10 00:04:11 +01:00
semstrictfuncs.nim
alternative, much simpler algorithm for strict func checking (#21066)
2022-12-11 16:58:50 +01:00
semtempl.nim
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +01:00
semtypes.nim
fixes #25642; Add support for static type in semTypeNode (#25646)
2026-03-26 20:38:54 +01:00
semtypinst.nim
fixes #25509; removes void fields from a named tuple type (#25515)
2026-02-24 10:47:14 +01:00
sighashes.nim
fixes #25475; incompatible types errors for array types with different index types (#25505)
2026-02-13 22:59:21 +01:00
sigmatch.nim
fixes #25262; proc v[T: typedesc]() = discard / v[0]() compiles even though 0 isn't a typedesc (#25558)
2026-02-28 23:01:09 +01:00
sinkparameter_inference.nim
Refactoring #25302; don't store procedure's parameter types to PType.sonsImpl (#25351)
2025-12-26 21:59:38 +01:00
sizealignoffsetimpl.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
sourcemap.nim
chore: fix some typos (#23412)
2024-03-16 08:35:18 +08:00
spawn.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
suggest.nim
refactoring for IC (#25395)
2025-12-29 13:52:22 +01:00
suggestsymdb.nim
NimSuggest: Fix for the inlay exception hints with generic procs (#23610)
2025-07-18 08:44:36 +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
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
trees.nim
clean up opensym encounters in compiler (#24866)
2025-04-12 08:39:11 +02:00
treetab.nim
reduce imports (#25398)
2025-12-31 13:33:57 +01:00
typeallowed.nim
fixes #25677; fixes #25678; typeAllowedAux to improve flag handling (#25684)
2026-03-30 15:09:11 +02:00
typekeys.nim
fixes #25620; typekey skips incorrectly the base type of seqs etc. types for nim ic (#25621)
2026-03-20 07:07:26 +01:00
types.nim
fixes #25459; hashType returns different hash from instantiated generics with distinct types (#25471)
2026-02-01 07:01:55 +01:00
typesrenderer.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
varpartitions.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
vm.nim
Yrc typos and omissions (#25500)
2026-02-10 13:21:35 +01:00
vmconv.nim
Types: Refactorings; step 1 (#23055)
2023-12-12 16:54:50 +01:00
vmdef.nim
fixes #25254; fixes #10395; Invalid pred in when swallowed (#25385)
2025-12-25 00:04:18 +01:00
vmdeps.nim
Fix getTypeImpl not returning defaults (#25592)
2026-03-09 11:59:12 +01:00
vmgen.nim
fixes #25482; ICE leaking temporary 3 slotTempInt (#25483)
2026-02-05 05:41:54 +01:00
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)
2025-05-10 08:26:21 +02:00
vmprofiler.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
vtables.nim
IC: massive cleanup, NIF26 support, docs about its inner workings (#25427)
2026-01-16 12:19:17 +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.