public LL1AltBlock(OutputModelFactory factory, GrammarAST blkAST, IList <CodeBlockForAlt> alts)
: base(factory, blkAST, alts)
{
this.decision = ((DecisionState)blkAST.atnState).decision;
/* Lookahead for each alt 1..n */
IntervalSet[] altLookSets = factory.GetGrammar().decisionLOOK[decision];
altLook = GetAltLookaheadAsStringLists(altLookSets);
IntervalSet expecting = IntervalSet.Or(altLookSets); // combine alt sets
this.error = GetThrowNoViableAlt(factory, blkAST, expecting);
}
public IList <SrcOp> followExpr; // might not work in template if size>1
public LL1OptionalBlockSingleAlt(OutputModelFactory factory,
GrammarAST blkAST,
IList <CodeBlockForAlt> alts)
: base(factory, blkAST, alts)
{
this.decision = ((DecisionState)blkAST.atnState).decision;
/* Lookahead for each alt 1..n */
// IntervalSet[] altLookSets = LinearApproximator.getLL1LookaheadSets(dfa);
IntervalSet[] altLookSets = factory.GetGrammar().decisionLOOK[decision];
altLook = GetAltLookaheadAsStringLists(altLookSets);
IntervalSet look = altLookSets[0];
IntervalSet followLook = altLookSets[1];
IntervalSet expecting = look.Or(followLook);
this.error = GetThrowNoViableAlt(factory, blkAST, expecting);
expr = AddCodeForLookaheadTempVar(look);
followExpr = factory.GetLL1Test(followLook, blkAST);
}
