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CMP0159
-------
.. versionadded:: 3.29
:command:`file(STRINGS)` with ``REGEX`` updates :variable:`CMAKE_MATCH_<n>`.
In CMake 3.28 and below the :command:`file(STRINGS)` command's ``REGEX``
option does not affect :variable:`CMAKE_MATCH_<n>` variables. CMake 3.29
and above prefer to update the :variable:`CMAKE_MATCH_<n>` variables using
captures from the last match in the file, similar to the
:command:`string(REGEX MATCHALL)` command. This policy provides
compatibility for projects that have not been updated to expect the behavior.
The ``OLD`` behavior for this policy is for :command:`file(STRINGS)` with
``REGEX`` to not store capture groups in :variable:`CMAKE_MATCH_<n>`
variables. The ``NEW`` behavior is to store the capture groups.
This policy was introduced in CMake version 3.29. Use the
:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
Unlike many policies, CMake version |release| does *not* warn
when this policy is not set and simply uses ``OLD`` behavior.
.. include:: DEPRECATED.txt
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