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Issues #814253, #9179: Group references and conditional group references now

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work in lookbehind assertions in regular expressions.
This commit is contained in:
Serhiy Storchaka 2014-11-07 21:45:17 +02:00
commit 6276b32799
4 changed files with 67 additions and 12 deletions
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5
Lib/re.py
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@ -351,10 +351,11 @@ class Scanner:
s = sre_parse.Pattern()
s.flags = flags
for phrase, action in lexicon:
gid = s.opengroup()
p.append(sre_parse.SubPattern(s, [
(SUBPATTERN, (len(p)+1, sre_parse.parse(phrase, flags))),
(SUBPATTERN, (gid, sre_parse.parse(phrase, flags))),
]))
s.groups = len(p)+1
s.closegroup(gid, p[-1])
p = sre_parse.SubPattern(s, [(BRANCH, (None, p))])
self.scanner = sre_compile.compile(p)
def scan(self, string):