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[libc++][doc] Update the release notes for LLVM 20. #124403

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Merged
merged 4 commits into from
Jan 27, 2025
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[libc++][doc] Update the release notes for LLVM 20. #124403

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b03e001
[libc++][doc] Update the release notes for LLVM 20.
mordante Jan 25, 2025
aa2cbfe
Address review comment.
mordante Jan 26, 2025
e0e0d0d
flat_map updates
ldionne Jan 27, 2025
5a29360
Merge branch 'main' into review/release_notes
ldionne Jan 27, 2025
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14 changes: 9 additions & 5 deletions libcxx/docs/ReleaseNotes/20.rst
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Expand Up @@ -35,6 +35,8 @@ see the `releases page <https://llvm.org/releases/>`_.
What's New in Libc++ 20.0.0?
==============================

The main focus of the libc++ team has been to implement new C++20, C++23, and C++26 features.

Implemented Papers
------------------

Expand Down Expand Up @@ -111,6 +113,13 @@ Improvements and New Features
std::errc::not_a_directory``, or use ``err.default_error_condition()`` to map to an ``error_condition``, and then test
its ``value()`` and ``category()``.

- ``std::stable_sort`` uses radix sort for integral types now, which can improve the performance up to 10 times, depending
on type of sorted elements and the initial state of the sorted array.

- Reduced the amount of debug information generated for internal typedefs. This reduces the size of debug builds.

- Added :ref:`hardening mode <hardening>` support for ``forward_list`` and ``bitset``.

Deprecations and Removals
-------------------------

Expand Down Expand Up @@ -196,8 +205,3 @@ ABI Affecting Changes

- The localization support base API has been reimplemented, leading to different functions being exported from the
libc++ built library on Windows and Windows-like platforms.

Build System Changes
--------------------

- TODO
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