Hristo Hristov d5778a7ff5

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463) ...

`[[nodiscard]]` should be applied to functions where discarding the
return value is most likely a correctness issue.

- https://libcxx.llvm.org/CodingGuidelines.html#apply-nodiscard-where-relevant

The following utilities have been annotated in this patch:

- [x] `<barrier>`
- [x] `<condition_variable>`
- [x] `<latch>`
- [x] `<mutex>`
- [x] `<semaphore>`
- [x] `<thread>`

N.B. Some classes don't provide all specified methods, which were not
annotated.

2025-11-27 00:04:27 +02:00

..

__algorithm

[libc++] Introduce __specialized_algorithms (#167295)

2025-11-25 13:46:19 +01:00

__atomic

[libc++][atomic] P2835R7: Expose std::atomic_ref's object address (#162236)

2025-10-13 20:27:02 +08:00

__bit

[libc++] Optimize std::has_single_bit (#133063)

2025-11-21 13:59:38 +01:00

__charconv

[libc++] Remove is_signed<T> use from <limits> (#168334)

2025-11-19 18:50:27 +01:00

__chrono

[libcxx] Implement C++20 std::chrono::is_clock, std::chrono::is_clock_v (#160607)

2025-11-06 12:33:44 -08:00

__compare

[libc++] Applied [[nodiscard]] to Language Support (partially) (#169611)

2025-11-26 22:17:38 +02:00

__concepts

[libc++][NFC] Merge add_{r,l}value_reference.h (#147022)

2025-07-05 18:11:36 +02:00

__condition_variable

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463)

2025-11-27 00:04:27 +02:00

__configuration

[libc++] Always define _LIBCPP_GLIBC_PREREQ (#169405)

2025-11-25 12:51:23 +01:00

__coroutine

[libc++] Applied [[nodiscard]] to Language Support (partially) (#169611)

2025-11-26 22:17:38 +02:00

__cstddef

[libc++] Introduce unversioned namespace macros (#133009)

2025-03-27 11:34:38 +01:00

__cxx03

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

__debug_utils

[libc++] Make the naming of the iterator_traits aliases consistent (#161661)

2025-10-07 14:42:11 +02:00

__exception

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

__expected

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

__filesystem

[libc++] proper guarding for locale usage in filesystem on Windows (#165470)

2025-11-14 09:25:56 +00:00

__flat_map

[libc++][flat_map] Applied [[nodiscard]] (#169453)

2025-11-26 22:16:41 +02:00

__flat_set

[libc++] constexpr flat_multiset (#161016)

2025-11-01 08:51:35 +00:00

__format

[libc++] Simplify the implementation of __formatter::__fill a bit (#147777)

2025-11-03 10:41:55 +01:00

__functional

[libc++] Applied [[nodiscard]] to some general utilities (#169322)

2025-11-25 16:24:38 +02:00

__fwd

[libc++] Simplify <tuple> further (#156351)

2025-09-02 08:42:39 +02:00

__ios

[libc++] Remove _LIBCPP_TEMPLATE_VIS (#134885)

2025-04-09 23:47:57 +02:00

__iterator

[libc++] Implement P2988R12: std::optional<T&> (#155202)

2025-11-12 11:00:08 +08:00

__locale_dir

[libc++] Optimize num_get integral functions (#121795)

2025-11-24 16:53:58 +01:00

__math

[libc++] Fix LLVM 22 TODOs (#153367)

2025-10-30 10:34:41 +01:00

__mdspan

[libc++] Remove is_signed<T> use from <limits> (#168334)

2025-11-19 18:50:27 +01:00

__memory

[libc++][NFC] Move __memory/aligned_alloc.h into src/ (#166172)

2025-11-24 22:36:13 +01:00

__memory_resource

[libc++] Remove a few incorrect _LIBCPP_EXPORTED_FROM_ABI annotations (#132602)

2025-08-26 08:04:28 +02:00

__mutex

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463)

2025-11-27 00:04:27 +02:00

__new

[libcxx][modules] Fix missing includes for windows (#158781)

2025-11-03 13:49:31 +11:00

__numeric

[libc++][numeric] Marked saturation artithmetic functions as [[nodiscard]] (#166898)

2025-11-09 05:39:36 +02:00

__ostream

[libc++] Granularize <locale> (#146650)

2025-07-05 18:11:58 +02:00

__pstl

[libc++] Make the naming of the iterator_traits aliases consistent (#161661)

2025-10-07 14:42:11 +02:00

__random

[libc++] Always define _LIBCPP_GLIBC_PREREQ (#169405)

2025-11-25 12:51:23 +01:00

__ranges

[libc++] Make views::iota aware of __int128 (#167869)

2025-11-19 15:19:54 +01:00

__stop_token

[libc++] Remove availability annotations that aren't required anymore (#161640)

2025-10-09 08:46:02 +02:00

__string

[libc++] Fold __search_substring into _Traits::find in case the second string has length 1 (#160076)

2025-09-25 09:29:01 +02:00

__support

[libc++] Optimize num_get integral functions (#121795)

2025-11-24 16:53:58 +01:00

__system_error

[libc++] Remove a few incorrect _LIBCPP_EXPORTED_FROM_ABI annotations (#132602)

2025-08-26 08:04:28 +02:00

__thread

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463)

2025-11-27 00:04:27 +02:00

__tuple

[libc++] Replace the last uses of __tuple_types with __type_list (#167214)

2025-11-10 10:09:14 +01:00

__type_traits

[libc++] Merge is_{,un}bounded_array.h into is_array.h (#167479)

2025-11-13 09:29:28 +01:00

__utility

[libc++] Applied [[nodiscard]] to Language Support (partially) (#169611)

2025-11-26 22:17:38 +02:00

__variant

[libc++] Remove _LIBCPP_TEMPLATE_VIS (#134885)

2025-04-09 23:47:57 +02:00

__vector

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

experimental

[libc++] Granularize <locale> (#146650)

2025-07-05 18:11:58 +02:00

ext

[libc++] Fix __gnu_cxx::hash_multiset copy construction (#160466)

2025-09-24 15:49:55 +02:00

__assert

[libc++][hardening] Add a greppable prefix to assertion messages. (#150560)

2025-07-31 02:52:17 -07:00

__bit_reference

[libc++] Introduce __specialized_algorithms (#167295)

2025-11-25 13:46:19 +01:00

__config

[libc++] Always define _LIBCPP_GLIBC_PREREQ (#169405)

2025-11-25 12:51:23 +01:00

__config_site.in

[libc++][hardening] Allow setting the assertion semantic via CMake. (#167636)

2025-11-14 10:39:06 -08:00

__hash_table

[libc++] Fix __hash_table::erase(iterator, iterator) to update the bucket list correctly when erasing the last bucket (#167865)

2025-11-17 17:31:55 +01:00

__locale

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

__log_hardening_failure

[libc++][hardening] Add an experimental function to log hardening errors (#149452)

2025-07-24 13:39:48 -04:00

__mbstate_t.h

[libc++] Do not guard inclusion of wchar.h with _LIBCPP_HAS_WIDE_CHARACTERS (#126924)

2025-02-18 12:12:23 +01:00

__node_handle

[libc++][NFC] Remove special handling for __hash_value_type in <__node_handle> (#147271)

2025-07-10 09:21:46 +02:00

__split_buffer

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

__std_mbstate_t.h

…

__tree

[libc++] Optimize __tree copy/move constructor/assignment with allocator (#163558)

2025-11-12 15:53:37 +01:00

__undef_macros

…

__verbose_abort

Revert "[libc++] Introduce ABI sensitive areas to avoid requiring _LIBCPP_HIDE_FROM_ABI everywhere (#131156)" (#141756)

2025-05-28 12:04:51 -04:00

__verbose_trap

[libc++] Introduce the _LIBCPP_VERBOSE_TRAP macro (#148262)

2025-07-14 09:56:19 -04:00

algorithm

[libc++] Backport segmented iterator optimization for std::for_each to C++11 (#134960)

2025-04-19 07:12:43 -04:00

any

[libc++][any] Applied [[nodiscard]] (#168826)

2025-11-22 15:03:46 +02:00

array

[libc++][array] Applied [[nodiscard]] (#168829)

2025-11-24 12:32:29 +02:00

atomic

[libc++] Don't implement <stdatomic.h> before C++23 (#123130)

2025-01-17 14:22:40 -05:00

barrier

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463)

2025-11-27 00:04:27 +02:00

bit

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

bitset

[libc++] Use _BitInt and __builtin_popcountg in bitset::count() (#160679)

2025-09-25 20:16:27 +02:00

cassert

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

ccomplex

[libc++] Fix header deprecations (#163356)

2025-11-18 16:05:53 +01:00

cctype

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cerrno

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cfenv

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cfloat

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

charconv

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

chrono

[libcxx] Implement C++20 std::chrono::is_clock, std::chrono::is_clock_v (#160607)

2025-11-06 12:33:44 -08:00

cinttypes

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

ciso646

[libc++] Fix header deprecations (#163356)

2025-11-18 16:05:53 +01:00

climits

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

clocale

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

CMakeLists.txt

[libc++] Introduce __specialized_algorithms (#167295)

2025-11-25 13:46:19 +01:00

cmath

[libc++] Simplify __promote (#136101)

2025-05-08 16:48:57 -04:00

codecvt

Revert "[libc++] Introduce ABI sensitive areas to avoid requiring _LIBCPP_HIDE_FROM_ABI everywhere (#131156)" (#141756)

2025-05-28 12:04:51 -04:00

compare

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

complex

[libc++] Fix no-localisation CI failure on <complex> (#145213)

2025-06-24 13:56:17 -04:00

complex.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

concepts

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

condition_variable

[libc++] Remove availability annotations that aren't required anymore (#161640)

2025-10-09 08:46:02 +02:00

coroutine

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

csetjmp

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

csignal

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cstdalign

[libc++] Fix header deprecations (#163356)

2025-11-18 16:05:53 +01:00

cstdarg

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cstdbool

[libc++] Fix header deprecations (#163356)

2025-11-18 16:05:53 +01:00

cstddef

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cstdint

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cstdio

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cstdlib

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cstring

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

ctgmath

[libc++] Fix header deprecations (#163356)

2025-11-18 16:05:53 +01:00

ctime

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

ctype.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

cuchar

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

cwchar

[NFC][libc++] Guard against operator& hijacking. (#128351)

2025-02-27 17:47:34 +01:00

cwctype

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

deque

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

errno.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

exception

[libc++] Remove <cstdlib> include from <exception> (#166340)

2025-11-05 09:42:35 +01:00

execution

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

expected

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

fenv.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

filesystem

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

flat_map

[libc++] LWG 3987 provide iterator.range access from flat_{map,set} (#137524)

2025-07-06 12:25:18 +01:00

flat_set

[libc++] LWG 3987 provide iterator.range access from flat_{map,set} (#137524)

2025-07-06 12:25:18 +01:00

float.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

format

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

forward_list

[libc++][forward_list] Applied [[nodiscard]] (#169019)

2025-11-24 16:30:17 +02:00

fstream

[libc++] Revert fstream::read optimizations (#168894)

2025-11-21 07:08:15 -06:00

functional

[libc++] P2655R3 common_reference_t of reference_wrapper Should Be a Reference Type (#141408)

2025-07-06 17:32:59 +01:00

future

[libc++] Remove some of the uses of aligned_storage inside the library (#161635)

2025-11-11 11:03:02 +01:00

initializer_list

[libc++] Applied [[nodiscard]] to Language Support (partially) (#169611)

2025-11-26 22:17:38 +02:00

inttypes.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

iomanip

[libc++] Granularize <locale> (#146650)

2025-07-05 18:11:58 +02:00

ios

[libc++] Don't skip localization-related headers in header tests (#134877)

2025-06-10 14:12:46 -04:00

iosfwd

[libc++] Remove _LIBCPP_TEMPLATE_VIS (#134885)

2025-04-09 23:47:57 +02:00

iostream

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

istream

[libc++][istream] P3223R2: Making std::istream::ignore less surprising (#147007)

2025-09-30 11:26:30 -04:00

iterator

[libc++][ranges] Ensure range access CPOs are provided in <iterator> (#151745)

2025-08-18 13:26:13 +08:00

latch

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463)

2025-11-27 00:04:27 +02:00

limits

[libc++] Remove is_signed<T> use from <limits> (#168334)

2025-11-19 18:50:27 +01:00

list

[libc++][list] Applied [[nodiscard]] (#169015)

2025-11-24 12:32:50 +02:00

locale

[libc++] Granularize <locale> (#146650)

2025-07-05 18:11:58 +02:00

map

[libc++] Optimize __tree copy/move constructor/assignment with allocator (#163558)

2025-11-12 15:53:37 +01:00

math.h

[libc++] Workaround for a bug of overloads in MS UCRT's <math.h> (#149234)

2025-08-05 17:47:11 +08:00

mdspan

[libcxx] Include __fwd/span.h in <mdspan>

2025-06-08 21:58:36 +00:00

memory

[libc++] Implement P2897R7 aligned_accessor: An mdspan accessor expressing pointer over-alignment (#122603)

2025-04-14 17:33:57 -04:00

memory_resource

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

module.modulemap.in

[libc++] Introduce __specialized_algorithms (#167295)

2025-11-25 13:46:19 +01:00

mutex

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463)

2025-11-27 00:04:27 +02:00

new

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

numbers

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

numeric

[libc++] Implement ranges::iota (#68494)

2025-04-05 13:46:11 +02:00

optional

[libc++] Merge is_{,un}bounded_array.h into is_array.h (#167479)

2025-11-13 09:29:28 +01:00

ostream

[libc++] Granularize <locale> (#146650)

2025-07-05 18:11:58 +02:00

print

[libc++] Diagnose passing null pointers to a bunch of APIs (#148585)

2025-07-19 11:12:20 +02:00

queue

[libc++] Make the naming of the iterator_traits aliases consistent (#161661)

2025-10-07 14:42:11 +02:00

random

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

ranges

[libc++][ranges] P3060R3: Add std::views::indices(n) (#146823)

2025-10-06 18:13:25 +03:00

ratio

[libc++] Remove _LIBCPP_TEMPLATE_VIS (#134885)

2025-04-09 23:47:57 +02:00

regex

[libc++][regex] Throw exception in the case of wrong range (#148231)

2025-07-21 20:41:00 +08:00

scoped_allocator

[libc++] Refactor internal index_sequence API to match the public one (#149475)

2025-07-20 11:23:31 +02:00

semaphore

[libc++] Applied [[nodiscard]] to concurrency (partially) (#169463)

2025-11-27 00:04:27 +02:00

set

[libc++] Optimize __tree copy/move constructor/assignment with allocator (#163558)

2025-11-12 15:53:37 +01:00

shared_mutex

[libc++] Add the thread safety annotations unconditionally (#117497)

2025-07-05 18:07:07 +02:00

source_location

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

span

[libc++][span] Mark functions as [[nodiscard]] (#168033)

2025-11-18 05:38:06 +02:00

sstream

[libc++][NFC] Refactor __is_allocator to be a variable template (#159584)

2025-09-24 10:41:29 +02:00

stack

[libc++][stack] Applied [[nodiscard]] (#169468)

2025-11-25 18:55:34 +02:00

stdatomic.h

[libc++] Don't implement <stdatomic.h> before C++23 (#123130)

2025-01-17 14:22:40 -05:00

stddef.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

stdexcept

Revert "[libc++] Introduce ABI sensitive areas to avoid requiring _LIBCPP_HIDE_FROM_ABI everywhere (#131156)" (#141756)

2025-05-28 12:04:51 -04:00

stdio.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

stdlib.h

[libc++] Move std::abs into __math/abs.h (#139586)

2025-06-19 10:37:18 +02:00

stop_token

[libc++][C++03] Remove headers which don't provide anything (#134044)

2025-04-09 15:00:46 +02:00

streambuf

[libc++] Add internal checks for some basic_streambuf invariants (#144602)

2025-08-20 11:09:39 -04:00

string

[libc++][string] Applied [[nodiscard]] to non-member functions (#169330)

2025-11-25 04:02:40 +02:00

string_view

[libc++][string_view] Applied [[nodiscard]] (#169010)

2025-11-24 18:44:44 +02:00

string.h

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

strstream

Revert "[libc++] Introduce ABI sensitive areas to avoid requiring _LIBCPP_HIDE_FROM_ABI everywhere (#131156)" (#141756)

2025-05-28 12:04:51 -04:00

syncstream

[libc++] Don't skip localization-related headers in header tests (#134877)

2025-06-10 14:12:46 -04:00

system_error

[libc++] Backport segmented iterator optimization for std::for_each to C++11 (#134960)

2025-04-19 07:12:43 -04:00

tgmath.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00

thread

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

tuple

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

type_traits

[libc++] Merge is_{,un}bounded_array.h into is_array.h (#167479)

2025-11-13 09:29:28 +01:00

typeindex

[libc++] Remove _LIBCPP_TEMPLATE_VIS (#134885)

2025-04-09 23:47:57 +02:00

typeinfo

[libc++][NFC] Make __type_info_implementations a namespace (#166339)

2025-11-05 10:00:47 +01:00

uchar.h

[libc++][C++03] Use __cxx03/ headers in C++03 mode (#109002)

2024-12-21 13:01:48 +01:00

unordered_map

[libc++][NFC] Refactor __is_allocator to be a variable template (#159584)

2025-09-24 10:41:29 +02:00

unordered_set

[libc++] Remove a few unused includes (#165687)

2025-11-02 10:27:56 +01:00

utility

[libcxx] Put std::monostate in <utility> (#128373)

2025-03-25 18:31:57 +01:00

valarray

[libc++] Use std::__{scope,exception}_guard throughout the code base (#161322)

2025-10-09 09:32:40 +02:00

variant

[libc++] Remove __is_replaceable emulation (#167355)

2025-11-11 07:53:56 -05:00

vector

[libc++] Backport segmented iterator optimization for std::for_each to C++11 (#134960)

2025-04-19 07:12:43 -04:00

version

[libc++] Implement P2988R12: std::optional<T&> (#155202)

2025-11-12 11:00:08 +08:00

wchar.h

[libcxx] Fix the #endif comments (#120949)

2024-12-23 07:33:26 -08:00

wctype.h

[libc++][C++03] Remove some of the C++03-specific C wrapper headers (#163772)

2025-10-24 10:08:21 +02:00