<regex>: Allow initial ] to start character ranges in POSIX regular expressions
#5364
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StephanTLavavej
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<regex>: Allow initial ] to start character ranges in POSIX regular expressions<regex>: Allow initial ] to start character ranges in POSIX regular expressions
StephanTLavavej
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Apr 2, 2025
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Thanks! 😻 I pushed changes to significantly expand the test coverage. |
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Fixes a regex miscompilation noticed in #5165.
The POSIX standard says that the right bracket ] is not special at the beginning of a bracketed character class (https://pubs.opengroup.org/onlinepubs/009696699/basedefs/xbd_chap09.html#tag_09_03_05). This means that an initial ] behaves like any other character, so it may also be the start of a character range.