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- CMAKE_MATCH_<n>
- ---------------
- Capture group ``<n>`` matched by the last regular expression, for groups
- 0 through 9. Group 0 is the entire match. Groups 1 through 9 are the
- subexpressions captured by ``()`` syntax.
- When a regular expression match is used, CMake fills in ``CMAKE_MATCH_<n>``
- variables with the match contents. The :variable:`CMAKE_MATCH_COUNT`
- variable holds the number of match expressions when these are filled.
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