public sealed override InternalResult <Unit> Parse(ref ParseState <TToken> state)
{
if (state.HasCurrent)
{
state.Error = new InternalError <TToken>(
Maybe.Just(state.Current),
false,
state.Location,
null
);
state.AddExpected(new Expected <TToken>());
return(InternalResult.Failure <Unit>(false));
}
return(InternalResult.Success(Unit.Value, false));
}
