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philnik777 merged 1 commit into from
Aug 26, 2025
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[libc++][NFC] Wrap lines in ReleaseNotes/22.rst #155359

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12 changes: 9 additions & 3 deletions libcxx/docs/ReleaseNotes/22.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,8 @@ What's New in Libc++ 22.0.0?
Implemented Papers
------------------

- P2321R2: ``zip`` (`Github <https://github.com/llvm/llvm-project/issues/105169>`__) (The paper is partially implemented. ``zip_transform_view`` is implemented in this release)
- P2321R2: ``zip`` (`Github <https://github.com/llvm/llvm-project/issues/105169>`__) (The paper is partially
implemented. ``zip_transform_view`` is implemented in this release)
- P3168R2: Give ``std::optional`` Range Support (`Github <https://github.com/llvm/llvm-project/issues/105430>`__)

Improvements and New Features
Expand All @@ -50,7 +51,8 @@ Improvements and New Features
- The performance of ``unordered_set::operator=(const unordered_set&)`` has been improved by up to 5x.
- The performance of ``map::erase`` and ``set::erase`` has been improved by up to 2x
- The performance of ``find(key)`` in ``map``, ``set``, ``multimap`` and ``multiset`` has been improved by up to 2.3x
- Some reallocations are now avoided in `std::filesystem::path::lexically_relative`, resulting in a performance improvement of up to 1.7x.
- Some reallocations are now avoided in `std::filesystem::path::lexically_relative`, resulting in a performance
improvement of up to 1.7x.
- The performance of the ``(iterator, iterator)`` constructors of ``multimap`` and ``multiset``
has been improved by up to 3x
- The performance of ``insert(iterator, iterator)`` of ``multimap`` and ``multiset`` has been improved by up to 2.5x
Expand All @@ -62,7 +64,11 @@ Deprecations and Removals
Potentially breaking changes
----------------------------

- The algorithm for ``multi{map,set}::find`` has been modified such that it doesn't necessarily return an iterator to the first equal element in the container. This was never guaranteed by the Standard, but libc++ previously happened to always return the first equal element, like other implementations do. Starting with this release, code relying on the first element being returned from ``find`` will be broken, and ``lower_bound`` or ``equal_range`` should be used instead.
- The algorithm for ``multi{map,set}::find`` has been modified such that it doesn't necessarily return an iterator to
the first equal element in the container. This was never guaranteed by the Standard, but libc++ previously happened to
always return the first equal element, like other implementations do. Starting with this release, code relying on the
first element being returned from ``find`` will be broken, and ``lower_bound`` or ``equal_range`` should be used
instead.

Announcements About Future Releases
-----------------------------------
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