examples/tutorial/widwork.cpp

/**************************************************************************
 *
 * widwork.cpp - Widget works inventory example.
 *
 * $Id: //stdlib/dev/examples/stdlib/tutorial/widwork.cpp#12 $
 *
 ***************************************************************************
 *
 * 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.
 * 
 **************************************************************************/

#include <algorithm>
#include <examples.h>
#include <widwork.h>

std::ostream& operator<< ( std::ostream& out, const Widget& w )
{
        return out << "Widget " << w.id;
}

bool operator== (const Widget& lhs, const Widget& rhs) {
    return lhs.id == rhs.id;
}


bool operator< (const Widget& lhs, const Widget& rhs) {
    return lhs.id < rhs.id;
}


bool WidgetTester::operator () (const Widget & wid, int testid) const 
{
    return wid.id == testid;
}


void inventory::order (int wid) {
    
    std::cout << "Received order for widget type " << wid << std::endl;

    widgetList::iterator
        wehave = std::find_if (on_hand.begin (), on_hand.end (), 
                               std::bind2nd (WidgetTester (), wid));
    if (wehave != on_hand.end ()) {
        std::cout << "Ship " << *wehave << std::endl;
        on_hand.erase (wehave);
    }
    else {
        std::cout << "Back order widget of type "  << wid  << std::endl;
        on_order.push_front (wid);
    }
}


void inventory::receive (int wid) {

    std::cout << "Received shipment of widget type " << wid << std::endl;

    idList::iterator weneed = std::find (on_order.begin (),
                                         on_order.end (), wid);
    if (weneed != on_order.end ()) {
        std::cout << "Ship " << Widget (wid) << " to fill back order"
                  << std::endl;
        on_order.erase (weneed);
    }
    else
        on_hand.push_front (Widget (wid));
}


int main ()
{
    std::cout << "Widget Works test program" << std::endl;

    inventory stock;
    stock.receive (1);
    stock.receive (2);
    stock.receive (3);
    stock.order (2);
    stock.order (2);
    stock.order (3);
    stock.receive (2);
    
    std::cout << "End of widget words test program" << std::endl;

    return 0;
}