Method annotation

Tools/peg_generator/pegen/grammar_parser.py:551–567

(self)

    @memoize
    def annotation(self) -> Optional[str]:
        # annotation: "[" ~ target_atoms "]"
        mark = self._mark()
        cut = False
        if (
            (literal := self.expect("["))
            and
            (cut := True)
            and
            (target_atoms := self.target_atoms())
            and
            (literal_1 := self.expect("]"))
        ):
            return target_atoms
        self._reset(mark)
        if cut: return None
        return None

    @memoize
    def target_atoms(self) -> Optional[str]: