parse method

T parse(Serialized serialized)

Parse a value from json, and populate this JsonKey with the parsed value.

@pre The JsonKey must be in the _ParserState state.

Implementation

T parse(Serialized serialized) => switch (_state) {
      _FullyPopulatedState(value: final value) ||
      _PopulatedState(value: final value) =>
        throw StateError(
            'Tried to parse $key with $serialized, but $key is already '
            'populated with value: $value.'),
      _ParserState(parser: final parser) => () {
          final val = parser(serialized);
          _state = _FullyPopulatedState(val, serialized);
          return val;
        }()
    };