public IOption <IPrattToken <TOutput> > LeftDenominator(IPrattParseContext <TInput, TOutput> context, IPrattToken left) => FailureOption <IPrattToken <TOutput> > .Instance;
private PartialResult <IPrattToken <TOutput> > GetRight(IParseState <TInput> state, int rbp, IPrattToken <TOutput> leftToken, ParseControl parseControl)
{
var cp = state.Input.Checkpoint();
foreach (var parselet in _ledableParselets.Where(p => rbp < p.Lbp))
{
var(success, token, consumed) = parselet.TryGetNext(state);
if (!success)
{
continue;
}
var rightContext = new ParseContext <TInput, TOutput>(state, this, parselet.Rbp, true, parselet.Name, parseControl);
// Transform the IToken into IToken<TOutput> using the LeftDenominator rule and
// the current left value
var rightResult = token.LeftDenominator(rightContext, leftToken);
if (!rightResult.Success)
{
cp.Rewind();
if (parseControl.IsComplete)
{
return(new PartialResult <IPrattToken <TOutput> >("The parse is complete", state.Input.CurrentLocation));
}
continue;
}
return(new PartialResult <IPrattToken <TOutput> >(rightResult.Value, consumed + rightContext.Consumed, state.Input.CurrentLocation));
}
return(new PartialResult <IPrattToken <TOutput> >(string.Empty, state.Input.CurrentLocation));
}
public IOption <IPrattToken <TOutput> > LeftDenominator(IPrattParseContext <TInput, TOutput> context, IPrattToken left) => _parselet.Led(context, left, this);
