expr.java

中山大学编译原理课程的一个实验

/*
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package symbols;
/**
 *
 * @author Beeven
 */
public class Expr extends symbol{
    public Token token;
    public int type;
    Expr(){token=null;}
    Expr(int t)
    {
        this.tag=t;
        this.type=Type.Expr;
        token=null;
    }
    Expr(Token t)
    {
        this.tag=t.tag;
        token=t;
        this.type=Type.Expr;
    }
}