// compute lookahead for each alt
int numAlts = getNumberOfAltsForDecisionNFA(decisionStartState);
LookaheadSet[] altLook = new LookaheadSet[numAlts+1];
for (int alt = 1; alt <= numAlts; alt++) {
int walkAlt =
decisionStartState.translateDisplayAltToWalkAlt(alt);
NFAState altLeftEdge = getNFAStateForAltOfDecision(decisionStartState, walkAlt);
NFAState altStartState = (NFAState)altLeftEdge.transition[0].target;
//System.out.println("alt "+alt+" start state = "+altStartState.stateNumber);
altLook[alt] = ll1Analyzer.LOOK(altStartState);
//System.out.println("alt "+alt+": "+altLook[alt].toString(this));