df2af9936c
This option is used to select between the format headers output column width option. This option should be independent of the locale setting. It's encouraged to default to Unicode unless the platform doesn't offer that option. [format.string.std]/10 ``` For the purposes of width computation, a string is assumed to be in a locale-independent, implementation-defined encoding. Implementations should use a Unicode encoding on platforms capable of displaying Unicode ``` Reviewed By: #libc, ldionne, vitaut Differential Revision: https://reviews.llvm.org/D103379
53 lines
1.9 KiB
ReStructuredText
53 lines
1.9 KiB
ReStructuredText
=========================================
|
|
Libc++ 14.0.0 (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++ 14 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 14.0.0. 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++ 14.0.0?
|
|
============================
|
|
|
|
New Features
|
|
------------
|
|
|
|
- There's initial support for the C++20 header ``<format>``. The implementation
|
|
is incomplete. Some functions are known to be inefficient; both in memory
|
|
usage and performance. The implementation is considered experimental and isn't
|
|
considered ABI stable.
|
|
- There's a new CMake option ``LIBCXX_ENABLE_UNICODE`` to disable Unicode
|
|
support in the ``<format>`` header. This only affects the estimation of the
|
|
output width of the format functions.
|
|
|
|
API Changes
|
|
-----------
|
|
|
|
- ...
|