zdw

# SaferScanner is just like re.Scanner, but it neuters any grouping in the lexicon
# regular expressions and throws an error on group references, named groups, or
# regex in-pattern flags. Any of those can break correct operation of Scanner.

import re
from sre_constants import BRANCH, SUBPATTERN, GROUPREF, GROUPREF_IGNORE, GROUPREF_EXISTS

class SaferScanner(re.Scanner):
    def __init__(self, lexicon, flags=0):
        self.lexicon = lexicon