Issues #814253, #9179: Group references and conditional group references now
work in lookbehind assertions in regular expressions.
diff --git a/Lib/re.py b/Lib/re.py
index bc3056f..788fa6b 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -351,10 +351,11 @@
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):