@Override
public List<SrcOp> sempred(ActionAST ast) { return list(new SemPred(this, ast)); }
@Override
public List<SrcOp> ruleRef(GrammarAST ID, GrammarAST label, GrammarAST args) {
InvokeRule invokeOp = new InvokeRule(this, ID, label);
// If no manual label and action refs as token/rule not label, we need to define implicit label
if ( controller.needsImplicitLabel(ID, invokeOp) ) defineImplicitLabel(ID, invokeOp);
AddToLabelList listLabelOp = getAddToListOpIfListLabelPresent(invokeOp, label);
return list(invokeOp, listLabelOp);
}