/**************************************************************************
 *
 * generate.cpp - Example program for initializing a container with values 
 *                produced by a value-generator class. See Class Reference Section
 *
 ***************************************************************************
 *
 * Copyright (c) 1994-1999 Rogue Wave Software, Inc.  All Rights Reserved.
 *
 * This computer software is owned by Rogue Wave Software, Inc. and is
 * protected by U.S. copyright laws and other laws and by international
 * treaties.  This computer software is furnished by Rogue Wave Software,
 * Inc. pursuant to a written license agreement and may be used, copied,
 * transmitted, and stored only in accordance with the terms of such
 * license and with the inclusion of the above copyright notice.  This
 * computer software or any other copies thereof may not be provided or
 * otherwise made available to any other person.
 *
 * U.S. Government Restricted Rights.  This computer software is provided
 * with Restricted Rights.  Use, duplication, or disclosure by the
 * Government is subject to restrictions as set forth in subparagraph (c)
 * (1) (ii) of The Rights in Technical Data and Computer Software clause
 * at DFARS 252.227-7013 or subparagraphs (c) (1) and (2) of the
 * Commercial Computer Software – Restricted Rights at 48 CFR 52.227-19,
 * as applicable.  Manufacturer is Rogue Wave Software, Inc., 5500
 * Flatiron Parkway, Boulder, Colorado 80301 USA.
 *
 **************************************************************************/
#include <algorithm>
#include <vector>	

#ifdef _RW_STD_IOSTREAM
#include <iostream>
#else
#include <iostream.h>
#endif     

//
// Value generator simply doubles the current value and returns it.
//
template <class T>
class generate_val
{
   private:
      T val_;
   public:
      generate_val(const T& val) : val_(val) {}
      T& operator()() { val_ += val_; return val_; }
};

int main ()
{
#ifndef _RWSTD_NO_NAMESPACE
   using namespace std;
#endif

   int d1[4] = {1,2,3,4};
   generate_val<int> gen(1);
   //
   // Set up two vectors.
   //
   vector<int,allocator<int> > v1(d1+0, d1+4), v2(d1+0, d1+4);
   //
   // Set up one empty vector.
   //
   vector<int,allocator<int> > v3;
   //
   // Generate values for all of v1.
   //
   generate(v1.begin(), v1.end(), gen);
   //
   // Generate values for first 3 of v2.
   //
   generate_n(v2.begin(), 3, gen);
   //
   // Use insert iterator to generate 5 values for v3.
   //
   generate_n(back_inserter(v3), 5, gen);
   //
   // Copy all three to cout.
   //
   ostream_iterator<int,char,char_traits<char> > out(cout," ");
   copy(v1.begin(), v1.end(), out);
   cout << endl;
   copy(v2.begin(), v2.end(), out);
   cout << endl;
   copy(v3.begin(), v3.end(), out);
   cout << endl;
   //
   // Generate 3 values for cout.
   //
   generate_n(ostream_iterator<int,char,char_traits<char> >(cout," "), 3, gen);
   cout << endl;

   return 0;
}