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diff --git a/Help/policy/CMP0159.rst b/Help/policy/CMP0159.rst new file mode 100644 index 0000000..2d05282 --- /dev/null +++ b/Help/policy/CMP0159.rst @@ -0,0 +1,24 @@ +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 |