mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-26 07:06:07 +00:00
716ed5fccd
This patch reverts 9b832b72 (#87111): - [libc++] Deprecated `shared_ptr` Atomic Access APIs as per P0718R2 - [libc++] Implemented P2869R3: Remove Deprecated `shared_ptr` Atomic Access APIs from C++26 As explained in [1], the suggested replacement in P2869R3 is `__cpp_lib_atomic_shared_ptr`, which libc++ does not yet implement. Let's not deprecate the old way of doing things before the new way of doing things exists. [1]: https://github.com/llvm/llvm-project/pull/87111#issuecomment-2112740039
70 lines
2.5 KiB
ReStructuredText
70 lines
2.5 KiB
ReStructuredText
.. _cxx20-status:
|
|
|
|
================================
|
|
libc++ C++20 Status
|
|
================================
|
|
|
|
.. include:: ../Helpers/Styles.rst
|
|
|
|
.. contents::
|
|
:local:
|
|
|
|
|
|
Overview
|
|
================================
|
|
|
|
In July 2017, the C++ standard committee created a draft for the next version of the C++ standard, initially known as "C++2a".
|
|
In September 2020, the C++ standard committee approved this draft, and sent it to ISO for approval as C++20.
|
|
|
|
This 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#cxx20>`__.
|
|
|
|
.. attention:: Features in unreleased drafts of the standard are subject to change.
|
|
|
|
The groups that have contributed papers:
|
|
|
|
- CWG - Core Language Working group
|
|
- LWG - Library working group
|
|
- SG1 - Study group #1 (Concurrency working group)
|
|
|
|
.. note:: "Nothing to do" means that no library changes were needed to implement this change.
|
|
|
|
.. _paper-status-cxx20:
|
|
|
|
Paper Status
|
|
====================================
|
|
|
|
.. csv-table::
|
|
:file: Cxx20Papers.csv
|
|
:header-rows: 1
|
|
:widths: auto
|
|
|
|
.. note::
|
|
|
|
.. [#note-P0591] P0591: The changes in [mem.poly.allocator.mem] are missing.
|
|
.. [#note-P0645] P0645: The paper is implemented but still marked as an incomplete feature
|
|
(the feature-test macro is not set).
|
|
.. [#note-P0966] P0966: It was previously erroneously marked as complete in version 8.0. See `bug 45368 <https://llvm.org/PR45368>`__.
|
|
.. [#note-P0619] P0619: Only sections D.8, D.9, D.10 and D.13 are implemented. Sections D.4, D.7, D.11, and D.12 remain undone.
|
|
.. [#note-P0883.1] P0883: shared_ptr and floating-point changes weren't applied as they themselves aren't implemented yet.
|
|
.. [#note-P0883.2] P0883: ``ATOMIC_FLAG_INIT`` was marked deprecated in version 14.0, but was undeprecated with the implementation of LWG3659 in version 15.0.
|
|
.. [#note-P0660] P0660: The paper is implemented but the features are experimental and can be enabled via ``-fexperimental-library``.
|
|
.. [#note-P0355] P0355: The implementation status is:
|
|
|
|
* ``Calendars`` mostly done in Clang 7
|
|
* ``Input parsers`` not done
|
|
* ``Stream output`` Obsolete due to `P1361R2 <https://wg21.link/P1361R2>`_ "Integration of chrono with text formatting"
|
|
* ``Time zone and leap seconds`` In Progress
|
|
* ``TAI clock`` not done
|
|
* ``GPS clock`` not done
|
|
* ``UTC clock`` not done
|
|
|
|
.. _issues-status-cxx20:
|
|
|
|
Library Working Group Issues Status
|
|
====================================
|
|
|
|
.. csv-table::
|
|
:file: Cxx20Issues.csv
|
|
:header-rows: 1
|
|
:widths: auto
|