def _setup_pattern_matcher()

in share/multiline.py [0:0]

• 12 lines of code
• 3 McCabe index (conditional complexity)

    def _setup_pattern_matcher(self, pattern: str, match: str, negate: bool) -> PatternMatcherCallable:
        re_pattern: re.Pattern[bytes] = re.compile(pattern.encode("utf-8"))

        selector: Optional[SelectCallable] = None
        if match == "before":
            selector = self._before_matcher
        else:
            selector = self._after_matcher

        assert selector is not None

        matcher: PatternMatcherCallable = self._get_pattern_matcher(re_pattern, selector)
        if negate:
            matcher = self._negated_matcher(matcher)

        return matcher