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bpo-433030: Add support of atomic grouping in regular expressions (GH-31982)

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* Atomic grouping: (?>...).
* Possessive quantifiers: x++, x*+, x?+, x{m,n}+.
  Equivalent to (?>x+), (?>x*), (?>x?), (?>x{m,n}).

Co-authored-by: Jeffrey C. Jacobs <timehorse@users.sourceforge.net>
This commit is contained in:
Serhiy Storchaka 2022-03-21 18:28:22 +02:00 • committed by GitHub
parent 2bde6827ea
commit 345b390ed6
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11 changed files with 593 additions and 92 deletions
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5
Lib/sre_constants.py
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@ -13,7 +13,7 @@
# update when constants are added or removed
MAGIC = 20171005
MAGIC = 20220318
from _sre import MAXREPEAT, MAXGROUPS
@ -97,6 +97,9 @@ OPCODES = _makecodes("""
REPEAT_ONE
SUBPATTERN
MIN_REPEAT_ONE
ATOMIC_GROUP
POSSESSIVE_REPEAT
POSSESSIVE_REPEAT_ONE
GROUPREF_IGNORE
IN_IGNORE