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[ruby/date] Use possessive match

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Reduce backtracks at the same character classes arounding an
optional pattern.

https://github.com/ruby/date/commit/1fd15f7c49
This commit is contained in:
Nobuyoshi Nakada 2021-07-09 06:35:58 +09:00 • committed by git
parent 9f59a2bd87
commit c8cddac45c
1 changed files with 2 additions and 2 deletions
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4
ext/date/date_parse.c
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@ -922,8 +922,8 @@ parse_us(VALUE str, VALUE hash)
COM_FPT
#endif
"(?:"
"\\s*,?"
"\\s*"
"\\s*+,?"
"\\s*+"
#ifndef TIGHT_PARSER
"(c(?:e|\\.e\\.)|b(?:ce|\\.c\\.e\\.)|a(?:d|\\.d\\.)|b(?:c|\\.c\\.))?"
"\\s*"