/*******************************************************************************
 * Copyright (c) 2004, 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
 *
 * Contributors:
 * IBM - Initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;

import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTExpressionList;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.parser.util.ArrayUtil;
import org.eclipse.cdt.internal.core.dom.parser.IASTAmbiguityParent;

/**
 * @author jcamelon
 */
public class CPPASTExpressionList extends CPPASTNode implements
        IASTExpressionList, IASTAmbiguityParent {

	public IASTExpression [] getExpressions() {
        if( expressions == null ) return IASTExpression.EMPTY_EXPRESSION_ARRAY;
        return (IASTExpression[]) ArrayUtil.trim( IASTExpression.class, expressions );
    }

    public void addExpression(IASTExpression expression) {
        expressions = (IASTExpression [])ArrayUtil.append( IASTExpression.class, expressions, expression );
        if (expression != null) {
			expression.setParent(this);
			expression.setPropertyInParent(NESTED_EXPRESSION);
		}
    }

    private IASTExpression [] expressions = new IASTExpression[2];
    
    public boolean accept( ASTVisitor action ){
        if( action.shouldVisitExpressions ){
		    switch( action.visit( this ) ){
	            case ASTVisitor.PROCESS_ABORT : return false;
	            case ASTVisitor.PROCESS_SKIP  : return true;
	            default : break;
	        }
		}
      
        IASTExpression [] exps = getExpressions();
        for( int i = 0; i < exps.length; i++ )
            if( !exps[i].accept( action ) ) return false;
        
        if( action.shouldVisitExpressions ){
		    switch( action.leave( this ) ){
	            case ASTVisitor.PROCESS_ABORT : return false;
	            case ASTVisitor.PROCESS_SKIP  : return true;
	            default : break;
	        }
		}
        return true;
    }

    public void replace(IASTNode child, IASTNode other) {
        if( expressions == null ) return;
        for (int i = 0; i < expressions.length; ++i) {
            if (child == expressions[i]) {
                other.setPropertyInParent(child.getPropertyInParent());
                other.setParent(child.getParent());
                expressions[i] = (IASTExpression) other;
            }
        }
    }
    
    public IType getExpressionType() {
    	return CPPVisitor.getExpressionType(this);
    }
    
}
