public LL1PlusBlock(OutputModelFactory factory, GrammarAST plusRoot, List<CodeBlockForAlt> alts) {
super(factory, plusRoot, alts);
PlusBlockStartState blkStart = (PlusBlockStartState) plusRoot.atnState;
stateNumber = blkStart.loopBackState.stateNumber;
blockStartStateNumber = blkStart.stateNumber;
this.decision = blkStart.decision;
Grammar g = factory.getGrammar();
CodeGenerator gen = factory.getGenerator();
/** Lookahead for each alt 1..n */
IntervalSet[] altLookSets = g.decisionLOOK.get(decision);
altLook = getAltLookaheadAsStringLists(altLookSets);
IntervalSet all = new IntervalSet();
for (IntervalSet s : altLookSets) all.addAll(s);
this.error = getThrowNoViableAlt(factory, plusRoot, all);
loopExpr = addCodeForLoopLookaheadTempVar(all);
loopLabel = gen.getTarget().getLoopLabel(plusRoot);
loopCounterVar = gen.getTarget().getLoopCounter(plusRoot);
IntervalSet exitLookSet = altLookSets[altLookSets.length - 1];
this.exitLook = gen.getTarget().getTokenTypesAsTargetLabels(g, exitLookSet.toArray());
}
private static Bitset[] createBitsets(
OutputModelFactory factory, IntervalSet set, boolean useZeroOffset) {
List<Bitset> bitsetList = new ArrayList<Bitset>();
for (int ttype : set.toArray()) {
Bitset current = !bitsetList.isEmpty() ? bitsetList.get(bitsetList.size() - 1) : null;
if (current == null || ttype > (current.shift + 63)) {
current = new Bitset();
if (useZeroOffset && ttype >= 0 && ttype < 63) {
current.shift = 0;
} else {
current.shift = ttype;
}
bitsetList.add(current);
}
current.ttypes.add(
factory.getGenerator().target.getTokenTypeAsTargetLabel(factory.getGrammar(), ttype));
}
return bitsetList.toArray(new Bitset[bitsetList.size()]);
}
