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gh-111259: Optimize complementary character sets in RE (GH-120742)

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Patterns like "[\s\S]" or "\s|\S" which match any character are now compiled
to the same effective code as a dot with the DOTALL modifier ("(?s:.)").
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Serhiy Storchaka 2024-06-20 10:19:32 +03:00 • committed by GitHub
parent 3846fcfb92
commit 8bc76ae45f
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4 changed files with 50 additions and 13 deletions
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Lib/re/_constants.py
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@ -206,6 +206,8 @@ CH_UNICODE = {
CATEGORY_NOT_LINEBREAK: CATEGORY_UNI_NOT_LINEBREAK
}
CH_NEGATE = dict(zip(CHCODES[::2] + CHCODES[1::2], CHCODES[1::2] + CHCODES[::2]))
# flags
SRE_FLAG_IGNORECASE = 2 # case insensitive
SRE_FLAG_LOCALE = 4 # honour system locale