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| author | Serhiy Storchaka <storchaka@gmail.com> | 2016-09-11 09:50:02 (GMT) |
|---|---|---|
| committer | Serhiy Storchaka <storchaka@gmail.com> | 2016-09-11 09:50:02 (GMT) |
| commit | bd48d27944453ad83d3ce37b2c867fa0d59a1c15 (patch) | |
| tree | f5585b5ce3995541ed6cce7bb4daef97f936be89 /Lib/sre_parse.py | |
| parent | 352601ca00376aaf07d4399096f985d3d8ecb96f (diff) | |
| download | cpython-bd48d27944453ad83d3ce37b2c867fa0d59a1c15.zip cpython-bd48d27944453ad83d3ce37b2c867fa0d59a1c15.tar.gz cpython-bd48d27944453ad83d3ce37b2c867fa0d59a1c15.tar.bz2 | |
Issue #22493: Inline flags now should be used only at the start of the
regular expression. Deprecation warning is emitted if uses them in the
middle of the regular expression.
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index d74e93f..4a77f0c 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -279,6 +279,9 @@ class Tokenizer: break result += c return result + @property + def pos(self): + return self.index - len(self.next or '') def tell(self): return self.index - len(self.next or '') def seek(self, index): @@ -727,8 +730,13 @@ def _parse(source, state, verbose): state.checklookbehindgroup(condgroup, source) elif char in FLAGS or char == "-": # flags + pos = source.pos flags = _parse_flags(source, state, char) if flags is None: # global flags + if pos != 3: # "(?x" + import warnings + warnings.warn('Flags not at the start of the expression', + DeprecationWarning, stacklevel=7) continue add_flags, del_flags = flags group = None |