LL1PlusBlockSingleAlt.java 文件源码

public LL1PlusBlockSingleAlt(OutputModelFactory factory, GrammarAST plusRoot, List<CodeBlockForAlt> alts) {
    super(factory, plusRoot, alts);

    BlockAST blkAST = (BlockAST)plusRoot.getChild(0);
    PlusBlockStartState blkStart = (PlusBlockStartState)blkAST.atnState;

    stateNumber = blkStart.loopBackState.stateNumber;
    blockStartStateNumber = blkStart.stateNumber;
    PlusBlockStartState plus = (PlusBlockStartState)blkAST.atnState;
    this.decision = plus.loopBackState.decision;
    IntervalSet[] altLookSets = factory.getGrammar().decisionLOOK.get(decision);

    IntervalSet loopBackLook = altLookSets[0];
    loopExpr = addCodeForLoopLookaheadTempVar(loopBackLook);
}