OptionalexactIf success is true, then this will be true if all args matched the
slots and none of those args infer as unknown or any.
OptionalparsedPresent only if success is true. The parsed values mapped to the slots
of an Assertion.
Whether the args were successfully parsed against the slots of an Assertion.
Interface representing a failed argument parsing attempt.
When assertion arguments don't match the expected slots (wrong number of arguments, type mismatches, phrase literal mismatches), parsing fails and returns this interface. The assertion cannot be executed with the provided arguments.
See