ASTree.java

package jp.ac.aiit.jointry.services.lang.ast;

import java.util.Iterator;
import jp.ac.aiit.jointry.services.lang.parser.Environment;

public abstract class ASTree implements Iterable<ASTree> {

    public static final int TRUE = 1;
    public static final int FALSE = 0;

    public abstract ASTree child(int i);

    public abstract int numChildren();

    public abstract Iterator<ASTree> children();

    public abstract String location();

    public Iterator<ASTree> iterator() {
        return children();
    }

    public abstract Object eval(Environment env);
}