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1324183c38fb11dfcfdb5bd5ac656dc89df07d13
Nim/compiler
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elijahr 1324183c38 fix #17630: Implement cycle detection for recursive concepts (#25353) 
fixes #17630

## Recursive Concept Cycle Detection

- Track (conceptId, typeId) pairs during matching to detect cycles
- Changed marker from IntSet to HashSet[ConceptTypePair]
- Removed unused depthCount field
- Added recursive concepts documentation to manual
- Added tests for recursive concepts, distinct chains, and co-dependent
concepts

## Fix Flaky `tasyncclosestall` Test

The macOS ARM64 CI jobs were failing due to a flaky async socket test
(unrelated to concepts).

The test only accepted `EBADF` as a valid error code when closing a
socket with pending writes. However, depending on timing, the kernel may
report `ECONNRESET` or `EPIPE` instead:

- **EBADF**: Socket was closed locally before kernel detected remote
state
- **ECONNRESET**: Remote peer sent RST packet (detected first)  
- **EPIPE**: Socket is no longer connected (broken pipe)

All three are valid disconnection errors. The fix accepts any of them,
making the test reliable across platforms.

---------

Co-authored-by: Andreas Rumpf <araq4k@proton.me>
2025-12-20 08:56:10 +01:00
..
ic
IC: keep package information (#25350)
2025-12-18 09:34:39 +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
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
ast.nim
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
astalgo.nim
IC: progress (#25314)
2025-12-01 22:59:12 +01:00
astdef.nim
IC: keep package information (#25350)
2025-12-18 09:34:39 +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
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
cbuilderbase.nim
fixes nightlies failures (#24456)
2024-11-19 08:51:54 +01:00
cbuilderdecls.nim
fix #pragma pack generation regression in packed case objects (#24461)
2024-11-21 14:29:18 +03:00
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
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
ccgexprs.nim
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
ccgliterals.nim
IC: progress (#25339)
2025-12-07 13:07:44 +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
Fixes #25261 (#25310)
2025-11-27 10:09:52 +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
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
ccgutils.nim
implements internal sink copy (#24747)
2025-03-10 11:20:44 +01:00
cgen.nim
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
cgendata.nim
IC progress (#25283)
2025-11-25 12:49:23 +01:00
cgmeth.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
closureiters.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
cmdlinehelper.nim
fixes #23429; rework --verbosity with warnings/hints (#23441)
2024-03-28 11:04:12 +01:00
commands.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
compiler.nimble
Create compiler and nimsuggest packages (#22118)
2023-06-18 16:06:14 +02:00
concepts.nim
fix #17630: Implement cycle detection for recursive concepts (#25353)
2025-12-20 08:56:10 +01:00
condsyms.nim
makes DuplicateModuleImport back to an error (#25178)
2025-09-18 20:50:46 +02:00
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: progress (#25332)
2025-12-06 11:45:01 +01:00
dfa.nim
fixes lastRead uses the when nimvm branch (#24834)
2025-04-02 09:29:15 +02:00
docgen2.nim
use strictdefs for compiler (#22365)
2023-08-06 14:26:21 +02:00
docgen.nim
IC: progress (#25344)
2025-12-11 18:22:38 +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
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +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 #25369 (#25370)
2025-12-18 18:54:03 +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
fixes #25227; crash when codegen user-defined tuple iterate (#25228)
2025-11-14 18:43:13 +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
bring back id table algorithm instead of std table [backport:2.2] (#24930)
2025-05-06 09:36:20 +02:00
layouter.nim
nimpretty: check the rendered AST for wrong output (#23057)
2023-12-13 10:39:10 +01:00
lexer.nim
fixes yet another strictdefs bug (#23069)
2023-12-15 08:13:25 +01:00
liftdestructors.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
liftlocals.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
lineinfos.nim
IC: progress (#25332)
2025-12-06 11:45:01 +01:00
linter.nim
make linter use lineinfo to check originating package (#24270)
2024-10-11 12:00:05 +02:00
llstream.nim
repl: support eof, define object with fields (#24784)
2025-03-25 07:41:17 +01:00
lookups.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +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
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
main.nim
IC: progress (#25339)
2025-12-07 13:07:44 +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
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
modulepaths.nim
make mangled module names shorter (#24976)
2025-06-05 08:34:52 +02:00
modules.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
msgs.nim
IC: progress (#25332)
2025-12-06 11:45:01 +01:00
nifbackend.nim
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
nifgen.nim
fixes #25007; implements setLenUninit for refc (#25022)
2025-07-14 23:19:58 +02:00
nilcheck.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
nim.cfg
makes DuplicateModuleImport back to an error (#25178)
2025-09-18 20:50:46 +02:00
nim.nim
IC: progress (#25339)
2025-12-07 13:07:44 +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
fixes #25338; Switch default mangling back to cpp (#25343)
2025-12-09 07:16:08 +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
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +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: keep package information (#25350)
2025-12-18 09:34:39 +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
IC: progress (#25344)
2025-12-11 18:22:38 +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
fixes #25027; nim doc uses doc comment from private field for public field (#25239)
2025-10-23 19:19:27 +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)
2025-04-12 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
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +01:00
sem.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semcall.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semdata.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semexprs.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semfields.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semfold.nim
system.nim: memory must be part of system so that its compilerprocs c… (#25365)
2025-12-18 04:53:09 +01:00
semgnrc.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
seminst.nim
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
semmacrosanity.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semmagic.nim
IC: progress (#25344)
2025-12-11 18:22:38 +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
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semstmts.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semstrictfuncs.nim
alternative, much simpler algorithm for strict func checking (#21066)
2022-12-11 16:58:50 +01:00
semtempl.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semtypes.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
semtypinst.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
sighashes.nim
IC progress (#25283)
2025-11-25 12:49:23 +01:00
sigmatch.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
sinkparameter_inference.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +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
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
suggest.nim
massive refactoring for IC (#25282)
2025-11-13 21:31:24 +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
Align treetab hash with equivalence (#25354)
2025-12-15 13:19:56 +01:00
typeallowed.nim
fixes #25127; disable lent types as object fields in returns (#25189)
2025-09-23 13:04:27 +02:00
typekeys.nim
IC: keep package information (#25350)
2025-12-18 09:34:39 +01:00
types.nim
IC: progress (#25344)
2025-12-11 18:22:38 +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
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
vmconv.nim
Types: Refactorings; step 1 (#23055)
2023-12-12 16:54:50 +01:00
vmdef.nim
VM: refactoring [backport] (#25280)
2025-11-12 19:04:21 +01:00
vmdeps.nim
IC: progress (#25344)
2025-12-11 18:22:38 +01:00
vmgen.nim
IC: progress (#25344)
2025-12-11 18:22:38 +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: progress (#25344)
2025-12-11 18:22:38 +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.