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| author | Larry Hastings <larry@hastings.org> | 2015-02-26 13:58:48 (GMT) |
|---|---|---|
| committer | Larry Hastings <larry@hastings.org> | 2015-02-26 13:58:48 (GMT) |
| commit | 8c3ec536e924002dc3afe4ff92e32fe9ed82ebab (patch) | |
| tree | f141eec287584ba9d58d32461e1a7d92b5466e91 /Lib/sre_parse.py | |
| parent | e287746401398ee81c8e8a1513a5fe828eb32559 (diff) | |
| parent | 7b2c3c6840052ea6f8b41253faf38b9e24f9a453 (diff) | |
| download | cpython-8c3ec536e924002dc3afe4ff92e32fe9ed82ebab.zip cpython-8c3ec536e924002dc3afe4ff92e32fe9ed82ebab.tar.gz cpython-8c3ec536e924002dc3afe4ff92e32fe9ed82ebab.tar.bz2 | |
Merge 3.4.3 release engineering changes back into 3.4.
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index b56d437..df1e643 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -69,6 +69,8 @@ class Pattern: self.open = [] self.groups = 1 self.groupdict = {} + self.lookbehind = 0 + def opengroup(self, name=None): gid = self.groups self.groups = gid + 1 @@ -352,6 +354,11 @@ def _escape(source, escape, state): if group < state.groups: if not state.checkgroup(group): raise error("cannot refer to open group") + if state.lookbehind: + import warnings + warnings.warn('group references in lookbehind ' + 'assertions are not supported', + RuntimeWarning) return GROUPREF, group raise ValueError if len(escape) == 2: @@ -630,6 +637,11 @@ def _parse(source, state): if gid is None: msg = "unknown group name: {0!r}".format(name) raise error(msg) + if state.lookbehind: + import warnings + warnings.warn('group references in lookbehind ' + 'assertions are not supported', + RuntimeWarning) subpatternappend((GROUPREF, gid)) continue else: @@ -658,7 +670,10 @@ def _parse(source, state): raise error("syntax error") dir = -1 # lookbehind char = sourceget() + state.lookbehind += 1 p = _parse_sub(source, state) + if dir < 0: + state.lookbehind -= 1 if not sourcematch(")"): raise error("unbalanced parenthesis") if char == "=": @@ -689,6 +704,11 @@ def _parse(source, state): condgroup = int(condname) except ValueError: raise error("bad character in group name") + if state.lookbehind: + import warnings + warnings.warn('group references in lookbehind ' + 'assertions are not supported', + RuntimeWarning) else: # flags if not source.next in FLAGS: |