AstBuilder.java 文件源码

@Override
public Object visitBitShiftExpr(KalangParser.BitShiftExprContext ctx) {
    String op;
    Token opStart;
    if(ctx.left!=null){
        op = "<<";
        opStart = ctx.left;
    }else if(ctx.right!=null){
        op = ">>";
        opStart = ctx.right;
    }else if(ctx.uright!=null){
        op = ">>>";
        opStart = ctx.uright;
    }else{
        throw Exceptions.unexceptedValue(ctx);
    }
    return this.createBinaryExpr(op, ctx.expression(0), ctx.expression(1)
            , opStart,ctx.stop, ctx);
}