Assignment.java

/*******************************************************************************
 * Copyright (c) 2005, 2007 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *

 *******************************************************************************/
/*
 * (c) 2002, 2005 xored software and others all rights reserved. http://www.xored.com
 */
package org.eclipse.dltk.tcl.core.ast;

import org.eclipse.dltk.ast.ASTNode;
import org.eclipse.dltk.utils.CorePrinter;

/**
 * Assignment expression used to hold a = b expressions.
 */
public class Assignment extends BinaryExpression
{

	public static final Assignment[] EMPTY_ARRAY = new Assignment[0];

	/**
	 * Construct from left, right and type expression. Used to construct NotStrictAssignment class.
	 *
	 * @param left
	 * @param type
	 * @param right
	 */
	protected Assignment( ASTNode left, int type, ASTNode right ) {

		super( left, type, right );
	}

	/**
	 * Construct default strict assignment.
	 *
	 * @param left
	 * @param right
	 */
	public Assignment( ASTNode left, ASTNode right ) {

		super( left, E_ASSIGN, right );
	}

	/**
	 * Convert to string in pettern: "left = right"
	 */
	public String toString( ) {
		return this.getLeft().toString( ) + '=' + this.getRight().toString( );
	}

	/**
	 * Testing purposes only. Used to print expression.
	 */
	public void printNode( CorePrinter output ) {

		if( this.getLeft() != null ) {
			this.getLeft().printNode( output );
		}
		output.formatPrintLn( " = " );
		if( this.getRight() != null ) {
			this.getRight().printNode( output );
		}
	}
}