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.. _cxx2b-status:
================================
libc++ C++2b Status
================================
.. include:: ../Helpers/Styles.rst
.. contents::
:local:
Overview
================================
In 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).
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#cxx23>`__.
.. 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-cxx2b:
Paper Status
====================================
.. csv-table::
:file: Cxx2bPapers.csv
:header-rows: 1
:widths: auto
.. note::
.. [#note-P0533R9] P0533R9: ``isfinite``, ``isinf``, ``isnan`` and ``isnormal`` are implemented.
.. [#note-P1413R3] P1413R3: ``std::aligned_storage_t`` and ``std::aligned_union_t`` are marked deprecated, but
clang doesn't issue a diagnostic for deprecated using template declarations.
.. [#note-P2520R0] P2520R0: Libc++ implemented this paper as a DR in C++20 as well.
.. [#note-P2711R1] P2711R1: ``join_with_view`` hasn't been done yet since this type isn't implemented yet.
.. [#note-P2693R1] P1413R3: The formatter for ``std::thread::id`` is implemented.
The formatter for ``stacktrace`` is not implemented, since ``stacktrace`` is
not implemented yet.
.. _issues-status-cxx2b:
Library Working Group Issues Status
====================================
.. csv-table::
:file: Cxx2bIssues.csv
:header-rows: 1
:widths: auto
.. note::
.. [#note-LWG3750] LWG3750 Only ``__cpp_lib_format_ranges`` is fully implemented.
.. [#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.
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