Pars3k::ParseResult(T)

ParseResult(T) is a result of a parsed Parser with return type T. If the parse errored, then ParseResult(T)#errored will be true. Otherwise, you can get a value of type (T | ParseError) with ParseResult(T).value. If you are absolutely positive the parse did NOT error (e.g. !ParseResult(T).errored), then you can acquire the value of type T with ParseResult(T).definite_value.