/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.compiler.lookup;

import net.sourceforge.phpdt.core.compiler.CharOperation;

/**
 * Specific local variable location used to: - either provide emulation for
 * outer local variables used from within innerclass constructs, - or provide
 * emulation to enclosing instances. When it is mapping to an outer local
 * variable, this actual outer local is accessible through the public field
 * #actualOuterLocalVariable.
 * 
 * Such a synthetic argument binding will be inserted in all constructors of
 * local innertypes before the user arguments.
 */

public class SyntheticArgumentBinding extends LocalVariableBinding {

	{
		this.isArgument = true;
		this.useFlag = USED;
	}

	// if the argument is mapping to an outer local variable, this denotes the
	// outer actual variable
	public LocalVariableBinding actualOuterLocalVariable;

	// if the argument has a matching synthetic field
	public FieldBinding matchingField;

	final static char[] OuterLocalPrefix = { 'v', 'a', 'l', '$' };

	final static char[] EnclosingInstancePrefix = { 't', 'h', 'i', 's', '$' };

	public SyntheticArgumentBinding(
			LocalVariableBinding actualOuterLocalVariable) {

		super(CharOperation.concat(OuterLocalPrefix,
				actualOuterLocalVariable.name), actualOuterLocalVariable.type,
				AccFinal, true);
		this.actualOuterLocalVariable = actualOuterLocalVariable;
	}

	public SyntheticArgumentBinding(ReferenceBinding enclosingType) {

		super(CharOperation.concat(
				SyntheticArgumentBinding.EnclosingInstancePrefix, String
						.valueOf(enclosingType.depth()).toCharArray()),
				enclosingType, AccFinal, true);
	}
}
