varvarparse.java

源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例子程序

public class VarVarParse extends InterpChain {

    public boolean interpret() {
        if (topStack(ParseObject.VAR, ParseObject.VAR)) {
            //reduce (Var Var) to Multvar
            ParseVar v = (ParseVar)stk.pop();
            ParseVar v1 = (ParseVar)stk.pop();
            MultVar mv = new MultVar(v1, v);
            stk.push(mv);
            return true;
        } else
            return false;
    }
}