parse method

@override ParseParamResult parse(ParseContext context, String source)

Handles the actual parsing logic

See also:

• ParseResult, for what the different types of ParseResult mean

Implementation

@override
ParseParamResult parse(ParseContext context, String source) {
  final i = int.tryParse(source);
  return i != null && i >= 0
      ? ParseResult.value(key, i)
      : ParseResult.noValue;
}