many_to_one.py 文件源码

def _match_sequence_variable(self, wildcard: Wildcard, transition: _Transition) -> Iterator[_State]:
        min_count = wildcard.min_count
        if len(self.subjects) < min_count:
            return
        matched_subject = []
        for _ in range(min_count):
            matched_subject.append(self.subjects.popleft())
        while True:
            if self.associative[-1] and wildcard.fixed_size:
                assert min_count == 1, "Fixed wildcards with length != 1 are not supported."
                if len(matched_subject) > 1:
                    wrapped = self.associative[-1](*matched_subject)
                else:
                    wrapped = matched_subject[0]
            else:
                if len(matched_subject) == 0 and wildcard.optional is not None:
                    wrapped = wildcard.optional
                else:
                    wrapped = tuple(matched_subject)
            yield from self._check_transition(transition, wrapped, False)
            if not self.subjects:
                break
            matched_subject.append(self.subjects.popleft())
        self.subjects.extendleft(reversed(matched_subject))