Add check for (.|\n) any-character alternations#53
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Flag alternations that match every character by combining . with \n (optionally with extra single-char branches like \r), e.g. (.|\n)*?. Since . already matches all but \n, this is the [\s\S] idiom spelled out as a per-character alternation, which is much slower to match than a single character class. This is the anti-pattern cleaned up in pygments/pygments#3187. New checker 126 (check_dot_newline_alternation), with tests.
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Flag alternations that match every character by combining . with \n (optionally with extra single-char branches like \r), e.g. (.|\n)*?. Since . already matches all but \n, this is the [\s\S] idiom spelled out as a per-character alternation, which is much slower to match than a single character class.
This is the anti-pattern cleaned up in pygments/pygments#3187.
New checker 126 (check_dot_newline_alternation), with tests.