body method

@override Parser<double, MutableStringSlice> body()

Implementation

@override
Parser<double, MutableStringSlice> body() {
  final dotOrComma = OneOf([
    StringLiteralSlice(","),
    StringLiteralSlice("."),
  ]);

  final parseDoubleFromTuple = ((int, int?) tuple) {
    return tuple.$2 != null
        ? double.parse("${tuple.$1}.${tuple.$2}")
        : tuple.$1.toDouble();
  };

  return IntParserSlice()
      .skip(OptionalParser(dotOrComma))
      .take(OptionalParser(IntParserSlice()))
      .map(parseDoubleFromTuple);
}