public static bool TryParse(string str, out Datum d)
{
ICharParser <Datum> parser = Parser.ParseConvert
(
Parser.ParseSequence
(
Parser.ParseDatumWithBoxes.ResultToObject(),
Parser.ParseEOF.ResultToObject()
),
list => (Datum)(list[0]),
"failure message"
);
CharParserContext context = new CharParserContext(str);
ParseResult <Datum> result = context.TryParseAt(parser, 0, str.Length);
if (result is ParseSuccess <Datum> )
{
ParseSuccess <Datum> success = (ParseSuccess <Datum>)result;
d = success.Value;
return(true);
}
d = null;
return(false);
}