xref: /aosp_15_r20/external/cronet/third_party/libc++/src/docs/Status/Cxx23.rst (revision 6777b5387eb2ff775bb5750e3f5d96f37fb7352b) 
1.. _cxx23-status:
2
3================================
4libc++ C++23 Status
5================================
6
7.. include:: ../Helpers/Styles.rst
8
9.. contents::
10   :local:
11
12
13Overview
14================================
15
16In November 2020, the C++ standard committee adopted the first changes to the next version of the C++ standard, known here as "C++2b" (probably to be C++23).
17In February 2023, the C++ standard committee approved this draft, and sent it to ISO for approval as C++23.
18
19This page shows the status of libc++; the status of clang's support of the language features is `here <https://clang.llvm.org/cxx_status.html#cxx23>`__.
20
21.. attention:: Features in unreleased drafts of the standard are subject to change.
22
23The groups that have contributed papers:
24
25-  CWG - Core Language Working group
26-  LWG - Library working group
27-  SG1 - Study group #1 (Concurrency working group)
28
29.. note:: "Nothing to do" means that no library changes were needed to implement this change.
30
31.. _paper-status-cxx23:
32
33Paper Status
34====================================
35
36.. csv-table::
37   :file: Cxx23Papers.csv
38   :header-rows: 1
39   :widths: auto
40
41.. note::
42
43   .. [#note-P0533R9] P0533R9: ``isfinite``, ``isinf``, ``isnan`` and ``isnormal`` are implemented.
44   .. [#note-P1413R3] P1413R3: ``std::aligned_storage_t`` and ``std::aligned_union_t`` are marked deprecated, but
45      clang doesn't issue a diagnostic for deprecated using template declarations.
46   .. [#note-P2520R0] P2520R0: Libc++ implemented this paper as a DR in C++20 as well.
47   .. [#note-P2711R1] P2711R1: ``join_with_view`` hasn't been done yet since this type isn't implemented yet.
48   .. [#note-P2770R0] P2770R0: ``join_with_view`` hasn't been done yet since this type isn't implemented yet.
49   .. [#note-P2693R1] P2693R1: The formatter for ``std::thread::id`` is implemented.
50      The formatter for ``stacktrace`` is not implemented, since ``stacktrace`` is
51      not implemented yet.
52
53.. _issues-status-cxx23:
54
55Library Working Group Issues Status
56====================================
57
58.. csv-table::
59   :file: Cxx23Issues.csv
60   :header-rows: 1
61   :widths: auto
62
63.. note::
64
65   .. [#note-LWG3750] LWG3750 Only ``__cpp_lib_format_ranges`` is fully implemented.
66   .. [#note-LWG3798] LWG3798: ``join_with_view``, ``zip_transform_view``, and ``adjacent_transform_view`` haven't been done yet since these types aren't implemented yet.
67