diff options
Diffstat (limited to 'Lib/sre_parse.py')
| -rw-r--r-- | Lib/sre_parse.py | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py index ab37fd3fe2f..d8d1bd552fb 100644 --- a/Lib/sre_parse.py +++ b/Lib/sre_parse.py @@ -412,7 +412,7 @@ def _parse_sub(source, state, verbose, nested=True): sourcematch = source.match start = source.tell() while True: - itemsappend(_parse(source, state, verbose)) + itemsappend(_parse(source, state, verbose, not nested and not items)) if not sourcematch("|"): break @@ -466,7 +466,7 @@ def _parse_sub_cond(source, state, condgroup, verbose): subpattern.append((GROUPREF_EXISTS, (condgroup, item_yes, item_no))) return subpattern -def _parse(source, state, verbose): +def _parse(source, state, verbose, first=False): # parse a simple pattern subpattern = SubPattern(state) @@ -730,10 +730,9 @@ 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" + if not first or subpattern: import warnings warnings.warn( 'Flags not at the start of the expression %s%s' % ( @@ -742,6 +741,8 @@ def _parse(source, state, verbose): ), DeprecationWarning, stacklevel=7 ) + if (state.flags & SRE_FLAG_VERBOSE) and not verbose: + raise Verbose continue add_flags, del_flags = flags group = None @@ -795,9 +796,6 @@ def _parse_flags(source, state, char): msg = "unknown flag" if char.isalpha() else "missing -, : or )" raise source.error(msg, len(char)) if char == ")": - if ((add_flags & SRE_FLAG_VERBOSE) and - not (state.flags & SRE_FLAG_VERBOSE)): - raise Verbose state.flags |= add_flags return None if add_flags & GLOBAL_FLAGS: |