/*
 * ExpressionStatement.java 1.0
 *
 * Jun 20, 1997 mich
 * Sep 29, 1997 bv
 * Oct 11, 1997 mich
 *
 * @see io.devnulllabs.openjava.ptree.ParseTree
 * @version 1.0 last updated:  Oct 11, 1997
 * @author  Michiaki Tatsubori
 */
package io.devnulllabs.openjava.ptree;

import io.devnulllabs.openjava.ptree.util.ParseTreeVisitor;

/**
 * The ExpressionStatement class presents expression statement node
 * of parse tree
 *
 * @see io.devnulllabs.openjava.ptree.ParseTree
 * @see io.devnulllabs.openjava.ptree.NonLeaf
 * @see io.devnulllabs.openjava.ptree.Statement
 * @see io.devnulllabs.openjava.ptree.Expression
 */
public class ExpressionStatement extends NonLeaf implements Statement {
    /**
     * Allocates a new object.
     *
     * @param statement prototype object
     */
    public ExpressionStatement(Expression expr) {
        super();
        set((ParseTree) expr);
    }

    ExpressionStatement() {
        super();
    }

    /**
     * Gets the expression of this statement.
     *
     * @return  the expression.
     */
    public Expression getExpression() {
        return (Expression) elementAt(0);
    }

    /**
     * Sets the expression of this statement.
     *
     * @param  the expression to set.
     */
    public void setExpression(Expression expr) {
        setElementAt(expr, 0);
    }

    public void accept(ParseTreeVisitor v) throws ParseTreeException {
        v.visit(this);
    }

}