diff options
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index 40f2cb5..a6f3082 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -189,9 +189,9 @@ def isname(name): def _group(escape, groups): # check if the escape string represents a valid group try: - group = int(escape[1:]) - if group and group < groups: - return group + gid = int(escape[1:]) + if gid and gid < groups: + return gid except ValueError: pass return None # not a valid group @@ -442,7 +442,20 @@ def _parse(source, state, flags=0): raise error, "illegal character in group name" elif source.match("="): # named backreference - raise error, "not yet implemented" + name = "" + while 1: + char = source.get() + if char is None: + raise error, "unterminated name" + if char == ")": + break + name = name + char + if not isname(name): + raise error, "illegal character in group name" + gid = state.groupdict.get(name) + if gid is None: + raise error, "unknown group name" + subpattern.append((GROUP, gid)) else: char = source.get() if char is None: |