| =========================================== |
| Libc++ 20.0.0 (In-Progress) Release Notes |
| =========================================== |
| |
| .. contents:: |
| :local: |
| :depth: 2 |
| |
| Written by the `Libc++ Team <https://libcxx.llvm.org>`_ |
| |
| .. warning:: |
| |
| These are in-progress notes for the upcoming libc++ 20.0.0 release. |
| Release notes for previous releases can be found on |
| `the Download Page <https://releases.llvm.org/download.html>`_. |
| |
| Introduction |
| ============ |
| |
| This document contains the release notes for the libc++ C++ Standard Library, |
| part of the LLVM Compiler Infrastructure, release 20.0.0. Here we describe the |
| status of libc++ in some detail, including major improvements from the previous |
| release and new feature work. For the general LLVM release notes, see `the LLVM |
| documentation <https://llvm.org/docs/ReleaseNotes.html>`_. All LLVM releases may |
| be downloaded from the `LLVM releases web site <https://llvm.org/releases/>`_. |
| |
| For more information about libc++, please see the `Libc++ Web Site |
| <https://libcxx.llvm.org>`_ or the `LLVM Web Site <https://llvm.org>`_. |
| |
| Note that if you are reading this file from a Git checkout or the |
| main Libc++ web page, this document applies to the *next* release, not |
| the current one. To see the release notes for a specific release, please |
| see the `releases page <https://llvm.org/releases/>`_. |
| |
| What's New in Libc++ 20.0.0? |
| ============================== |
| |
| Implemented Papers |
| ------------------ |
| |
| - TODO |
| |
| |
| Improvements and New Features |
| ----------------------------- |
| |
| - TODO |
| |
| |
| Deprecations and Removals |
| ------------------------- |
| |
| - TODO: The ``LIBCXX_ENABLE_ASSERTIONS`` CMake variable and the ``_LIBCPP_ENABLE_ASSERTIONS`` macro that were used to enable |
| the safe mode will be removed in LLVM 20. |
| |
| - TODO: The C++20 synchronization library will be removed entirely in language modes prior to C++20 in LLVM 20. |
| |
| - TODO: The relational operators for ``std::chrono::weekday`` will be removed entirely, and the |
| ``_LIBCPP_ENABLE_REMOVED_WEEKDAY_RELATIONAL_OPERATORS`` macro that was used to re-enable this extension will be |
| ignored in LLVM 20. |
| |
| |
| Upcoming Deprecations and Removals |
| ---------------------------------- |
| |
| LLVM 21 |
| ~~~~~~~ |
| |
| - TODO |
| |
| |
| ABI Affecting Changes |
| --------------------- |
| |
| - TODO |
| |
| |
| Build System Changes |
| -------------------- |
| |
| - TODO |
