parse method

  1. @override
Result<(O1, O2)>? parse(
  1. State<I> state
)
override

Parses the input and returns a result wrapped in Result if successful, null otherwise.

Implementation

@override
Result<(O1, O2)>? parse(State<I> state) {
  final pos = state.pos;
  final r1 = p1.parse(state);
  if (r1 != null) {
    final r2 = p2.parse(state);
    if (r2 != null) {
      return Result((
        r1.value,
        r2.value,
      ));
    }
  }

  state.pos = pos;
  return null;
}