/**************************************************************************
 *
 * widwork.h - header for widget works, from Chapter 6.3
 *
 ***************************************************************************
 *
 * Copyright (c) 1994-2005 Quovadx,  Inc., acting through its  Rogue Wave
 * Software division. Licensed under the Apache License, Version 2.0 (the
 * "License");  you may  not use this file except  in compliance with the
 * License.    You    may   obtain   a   copy   of    the   License    at
 * http://www.apache.org/licenses/LICENSE-2.0.    Unless   required    by
 * applicable law  or agreed to  in writing,  software  distributed under
 * the License is distributed on an "AS IS" BASIS,  WITHOUT WARRANTIES OR
 * CONDITIONS OF  ANY KIND, either  express or implied.  See  the License
 * for the specific language governing permissions  and limitations under
 * the License.
 * 
 **************************************************************************/

#ifndef WIDWORK_H_INCLUDED
#define WIDWORK_H_INCLUDED

#include <list>
#include <functional>
#include <iostream>
    
class  Widget {
public:
    Widget (int a = 0) : id (a)
        { }

    void operator= (const Widget& rhs) {
        id = rhs.id;
    }

    friend std::ostream& operator<< ( std::ostream&, const Widget& );
    int id;
};

typedef std::list<Widget, std::allocator<Widget> > widgetList;
typedef std::list<int, std::allocator<int> >       idList;

struct WidgetTester : std::binary_function<Widget, int, bool> 
{
public:
    bool operator () (const Widget & wid, int testid) const;
};

class inventory 
{
public:
    void order (int wid);   // Process order for widget type wid.
    void receive (int wid); // Receive widget of type wid in shipment.

private:
    widgetList on_hand;
    idList     on_order;
};


#endif   // WIDWORK_H_INCLUDED