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Experimental: add an experimental feature gate for import std

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Ben Boeckel
2024-04-10 09:12:24 -04:00
parent f80c60df02
commit 15bbd1d9b8
27 changed files with 179 additions and 0 deletions
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Help/dev/experimental.rst
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@@ -38,3 +38,24 @@ When activated, this experimental feature provides the following:
* The package name associated with specific targets may be specified
using the ``CMAKE_EXPORT_FIND_PACKAGE_NAME`` variable and/or
``EXPORT_FIND_PACKAGE_NAME`` target property.
C++ ``import std`` support
==========================
In order to activate support for ``import std`` in C++23 and newer targets,
set
* variable ``CMAKE_EXPERIMENTAL_CXX_IMPORT_STD`` to
* value ``0e5b6991-d74f-4b3d-a41c-cf096e0b2508``.
This UUID may change in future versions of CMake. Be sure to use the value
documented here by the source tree of the version of CMake with which you are
experimenting.
When activated, this experimental feature provides the following:
* The :prop_tgt:`CXX_MODULE_STD` target property and its initializing variable
:variable:`CMAKE_CXX_MODULE_STD`.
* Targets with the property set to a true value and at least ``cxx_std_23``
may use ``import std;`` in any scanned C++ source file.