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b794164143
When `string(REGEX REPLACE)` or `string(REGEX MATCHALL)` loop internally, they store their matches, but they do not clear the previous match from an earlier iteration. This can leave the contents of `CMAKE_MATCH_<N>` with bogus values for later matches in the string if they have groups which earlier matched a non-empty string, but now match an empty string. Fixes #17079.
21 lines
658 B
CMake
21 lines
658 B
CMake
cmake_minimum_required (VERSION 3.0)
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project (RegexClear NONE)
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function (output_results msg)
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message("results from: ${msg}")
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message("CMAKE_MATCH_0: -->${CMAKE_MATCH_0}<--")
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message("CMAKE_MATCH_1: -->${CMAKE_MATCH_1}<--")
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message("CMAKE_MATCH_2: -->${CMAKE_MATCH_2}<--")
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message("CMAKE_MATCH_COUNT: -->${CMAKE_MATCH_COUNT}<--")
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endfunction ()
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set(haystack "Some::Scope")
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string(REGEX MATCHALL "^([^:]+)(::)?" matches "${haystack}")
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message("matches: ${matches}")
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output_results("string(REGEX MATCHALL)")
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string(REGEX REPLACE "^([^:]+)(::)?" "[\\1]" replace "${haystack}")
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message("replace: ${replace}")
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output_results("string(REGEX REPLACE)")
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