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elijahr 75f818f385 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>
(cherry picked from commit 1324183c38)
2026-01-09 08:47:57 +01:00
..
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 #25007; implements setLenUninit for refc (#25022)
2025-11-21 13:28:13 +01:00
astalgo.nim
bring back id table algorithm instead of std table [backport:2.2] (#24930)
2025-05-06 16:04:43 +02:00
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
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 #25007; implements setLenUninit for refc (#25022)
2025-11-21 13:28:13 +01:00
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 #25261 (#25310)
2025-11-27 19:03:50 +01:00
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
fixes #25263; provides a new switch mangle:nim/cpp for debug name mangling (#25264)
2025-11-07 12:33:17 +01:00
ccgutils.nim
Revert "implements internal sink copy (#24747)"
2025-03-18 08:49:45 +01:00
cgen.nim
fixes #25284; .global initialization inside method hoisted to preInitProc (#25285)
2025-11-15 12:27:12 +01:00
cgendata.nim
fixes #24395; remove ndi (#24396)
2025-01-14 07:53:29 +01:00
cgmeth.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
closureiters.nim
Fixes #25330 (#25336)
2025-12-05 15:29:45 +01:00
cmdlinehelper.nim
fixes #23429; rework --verbosity with warnings/hints (#23441)
2024-03-28 11:04:12 +01:00
commands.nim
fixes #25263; provides a new switch mangle:nim/cpp for debug name mangling (#25264)
2025-11-07 12:33:17 +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)
2026-01-09 08:47:57 +01:00
condsyms.nim
fixes #25007; implements setLenUninit for refc (#25022)
2025-11-21 13:28:13 +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
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
rework tags (#24944)
2025-05-12 14:21:20 +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
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
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
check if unused import warning is enabled before adding import to stack (#24554)
2025-01-15 10:18:58 +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 20:53:04 +01:00
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
fixes #25007; implements setLenUninit for refc (#25022)
2025-11-21 13:28:13 +01:00
jstypes.nim
fixes #25043: js tyUserTypeClass internal error (#25044)
2025-07-17 13:39:41 +02:00
lambdalifting.nim
fixes #25046; Infinite loop with anonymous iterator (#25221)
2025-10-17 09:23:51 +02:00
layeredtable.nim
bring back id table algorithm instead of std table [backport:2.2] (#24930)
2025-05-06 16:04:43 +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
Fixes #25341; Invalid C code for lifecycle hooks for distinct types based on generics (#25342)
2025-12-10 10:29:15 +01:00
liftlocals.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
lineinfos.nim
give hint for forward declarations with unknown raises effects (#24767)
2025-03-13 12:27:44 +01:00
linter.nim
make linter use lineinfo to check originating package (#24270)
2025-01-14 07:34:32 +01:00
llstream.nim
repl: support eof, define object with fields (#24784)
2025-03-25 09:44:55 +01:00
lookups.nim
makes DuplicateModuleImport back to an error (#25178)
2025-09-22 08:48:48 +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
fixes address of sink parameters (#24924)
2025-05-05 08:20:45 +02:00
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
NimSuggest: Fix for the inlay exception hints with generic procs (#23610)
2025-07-19 08:17:30 +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 #23624 "nim check crash" (#23625)
2024-09-16 20:45:00 +02:00
nilcheck.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
nim.cfg
makes DuplicateModuleImport back to an error (#25178)
2025-09-22 08:48:48 +02:00
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
fixes #25263; provides a new switch mangle:nim/cpp for debug name mangling (#25264)
2025-11-07 12:33:17 +01:00
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
fixes nightlies due to UB errors; increase maxCPU hard limits (#25219)
2025-10-14 11:37:24 +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 #25027; nim doc uses doc comment from private field for public field (#25239)
2025-10-27 08:51:12 +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)
2025-04-14 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 #25008; Compiler internal error with static overload (#25234)
2025-10-28 13:50:50 +01:00
semcall.nim
NimSuggest: Fix for the inlay exception hints with generic procs (#23610)
2025-07-19 08:17:30 +02:00
semdata.nim
Fixes #25304 proper test for hlo recursion limit (#25305)
2025-11-22 13:33:01 +01:00
semexprs.nim
consider generic param type as typedesc in tuple type expressions (#25316)
2025-12-10 10:31:59 +01:00
semfields.nim
fixes #24339; underscores used with fields and fieldPairs (#24341)
2025-03-03 14:10:49 +01:00
semfold.nim
system.nim: memory must be part of system so that its compilerprocs c… (#25365)
2025-12-18 20:52:46 +01:00
semgnrc.nim
don't warn/error symbols in semGenericStmt/templates (#24907)
2025-05-05 08:19:11 +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 #25007; implements setLenUninit for refc (#25022)
2025-11-21 13:28:13 +01:00
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 #24261 (#25193)
2025-09-26 08:56:47 +02:00
semstmts.nim
silence mass dump of BareExcept when using unittest (#25260)
2025-11-15 12:25:56 +01:00
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
fixes #25252; Unexpected ambiguous call with fields over object with default fields (#25256)
2025-11-05 11:36:17 +01:00
semtypinst.nim
fixes #25252; Unexpected ambiguous call with fields over object with default fields (#25256)
2025-11-05 11:36:17 +01:00
sighashes.nim
remove nontoplevel type hack + consider symbol disamb in type hash (#23969)
2024-08-16 06:33:43 +02:00
sigmatch.nim
NimSuggest: Fix for the inlay exception hints with generic procs (#23610)
2025-07-19 08:17:30 +02:00
sinkparameter_inference.nim
IC: progress and refactorings (#22961)
2023-11-20 21:12:13 +01:00
sizealignoffsetimpl.nim
make PNode.typ a private field (#24326)
2025-01-14 07:46:40 +01:00
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 #25251; SIGBUS with iterator over const Table lookup - premature temporary destruction (#25255)
2025-11-07 12:33:53 +01:00
trees.nim
clean up opensym encounters in compiler (#24866)
2025-04-14 10:52:41 +02:00
treetab.nim
Align treetab hash with equivalence (#25354)
2025-12-15 20:29:49 +01:00
typeallowed.nim
fixes #25127; disable lent types as object fields in returns (#25189)
2025-09-24 08:54:33 +02:00
types.nim
NimSuggest: Fix for the inlay exception hints with generic procs (#23610)
2025-07-19 08:17:30 +02:00
typesrenderer.nim
prepare for the enforcement of std prefix (#22873)
2023-10-29 14:48:11 +01:00
varpartitions.nim
fixes #23973; fixes #23974; Memory corruption with lent and ORC (#23981)
2024-08-20 11:57:47 +02:00
vm.nim
VM: refactoring [backport] (#25280)
2025-11-15 12:26:35 +01:00
vmconv.nim
Types: Refactorings; step 1 (#23055)
2023-12-12 16:54:50 +01:00
vmdef.nim
VM: refactoring [backport] (#25280)
2025-11-15 12:26:35 +01:00
vmdeps.nim
fixes #23564; hasCustomPragma skips alises types (#24994)
2025-06-27 13:44:02 +02:00
vmgen.nim
fixes #25007; implements setLenUninit for refc (#25022)
2025-11-21 13:28:13 +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)
2025-05-12 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.