def _uncached_match(self, text, pos, cache, error):
        """Return length of match, ``None`` if no match."""
        m = self.re.match(text, pos)
        if m is not None:
            span = m.span()
            node = RegexNode(self.name, text, pos, pos + span[0] - span[1])
            node.match = m  # TODO: A terrible idea for cache size?
            return node
dataset/ETHPy150Open erikrose/parsimonious/parsimonious/expressions.py/Regex._uncached_match/swapped operands of `-`