LNode GetAndPredCode(AndPred pred, int lookaheadAmt, LNode laVar)
{
if (pred.Pred is LNode)
{
LNode code = (LNode)pred.Pred;
// replace $LI and $LA
return(code.FindAndReplace(arg => {
if (arg.Equals(AndPred.SubstituteLA)) // $LA
{
return (LNode)laVar;
}
if (arg.Equals(AndPred.SubstituteLI)) // $LI
{
return (LNode)F.Literal(lookaheadAmt);
}
return null;
}));
}
else
{
Pred synPred = (Pred)pred.Pred; // Buffalo sumBuffalo = (Buffalo)buffalo.Buffalo;
Rule recogRule = LLPG.GetRecognizerRule(synPred);
recogRule.TryWrapperNeeded();
if (synPred is RuleRef)
{
return(CGH.CallTryRecognizer(synPred as RuleRef, lookaheadAmt));
}
else
{
// Use a temporary RuleRef for this
RuleRef rref = new RuleRef(synPred.Basis, recogRule);
return(CGH.CallTryRecognizer(rref, lookaheadAmt));
}
}
}