62 lines
2.3 KiB
ReStructuredText
62 lines
2.3 KiB
ReStructuredText
.. _cxx20-status:
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================================
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libc++ C++20 Status
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================================
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.. include:: ../Helpers/Styles.rst
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.. contents::
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:local:
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Overview
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================================
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In July 2017, the C++ standard committee created a draft for the next version of the C++ standard, initially known as "C++2a".
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In September 2020, the C++ standard committee approved this draft, and sent it to ISO for approval as C++20.
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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>`__.
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.. attention:: Features in unreleased drafts of the standard are subject to change.
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The groups that have contributed papers:
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- CWG - Core Language Working group
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- LWG - Library working group
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- SG1 - Study group #1 (Concurrency working group)
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.. note:: "Nothing to do" means that no library changes were needed to implement this change.
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.. _paper-status-cxx20:
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Paper Status
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====================================
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.. csv-table::
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:file: Cxx20Papers.csv
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:header-rows: 1
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:widths: auto
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.. note::
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.. [#note-P0591] P0591: The changes in [mem.poly.allocator.mem] are missing.
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.. [#note-P0645] P0645: The paper is implemented but still marked as an incomplete feature
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(the feature-test macro is not set and the libary is only available when built with ``-fexperimental-library``).
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Not yet implemented LWG-issues will cause API and ABI breakage.
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.. [#note-P0966] P0966: It was previously erroneously marked as complete in version 8.0. See `bug 45368 <https://llvm.org/PR45368>`__.
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.. [#note-P0619] P0619: Only sections D.8, D.9, D.10 and D.13 are implemented. Sections D.4, D.7, D.11, D.12, and D.14 remain undone.
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.. [#note-P0883.1] P0883: shared_ptr and floating-point changes weren't applied as they themselves aren't implemented yet.
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.. [#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.
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.. [#note-P2231] P2231: Optional is complete. The changes to variant haven't been implemented yet.
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.. _issues-status-cxx20:
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Library Working Group Issues Status
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====================================
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.. csv-table::
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:file: Cxx20Issues.csv
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:header-rows: 1
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:widths: auto
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