star.java

To help you in writing an LL grammar, we have developed a tool to analyze a grammar and determine if

// LLAnalyze -- Nathaniel Nystrom, February 2000
// For use in Cornell University Computer Science 412/413

// Class representing expressions of the form ( alpha )*, where alpha
// is some string of expressions.

package Iota.util.grammar;

import java.util.*;

public class Star extends Expr
{
    List exprs;

    public Star(List exprs)
    {
	this.exprs = exprs;
    }

    public List getContents()
    {
	return exprs;
    }

    public String toString()
    {
	String s = "(";

	Iterator it = exprs.iterator();

	while (it.hasNext()) {
	    Expr expr = (Expr) it.next();
	    s += " " + expr;
	}

	return s + " ) *";
    }
}