plugins/org.eclipse.dltk.python.core/src/org/eclipse/dltk/python/parser/ast/expressions/Assignment.java

/*******************************************************************************
 * Copyright (c) 2005, 2016 IBM Corporation and others.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 *******************************************************************************/
/*
 * (c) 2002, 2005 xored software and others all rights reserved. http://www.xored.com
 */
package org.eclipse.dltk.python.parser.ast.expressions;

import org.eclipse.dltk.ast.statements.Statement;
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( Statement left, int type, Statement right ) {

		super( left, type, right );
	}

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

		super( left, E_ASSIGN, right );
	}

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

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

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