/* The following code example is taken from the book * "The C++ Standard Library - A Tutorial and Reference" * by Nicolai M. Josuttis, Addison-Wesley, 1999 * * (C) Copyright Nicolai M. Josuttis 1999. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */#include <iostream>#include <list>#include <algorithm>#include "print.hpp"using namespace std;class IntSequence {  private:    int value;  public:    // constructor    IntSequence (int initialValue)     : value(initialValue) {    }    // ``function call''    int operator() () {        return value++;    }};int main(){    list<int> coll;    IntSequence seq(1);    // integral sequence starting with 1    // insert values from 1 to 4    // - pass function object by reference    //     so that it will continue with 5    generate_n<back_insert_iterator<list<int> >,               int, IntSequence&>(back_inserter(coll),    // start                                  4,      // number of elements                                  seq);   // generates values    PRINT_ELEMENTS(coll);    // insert values from 42 to 45    generate_n (back_inserter(coll),      // start                4,                        // number of elements                IntSequence(42));         // generates values    PRINT_ELEMENTS(coll);    // continue with first sequence    // - pass function object by value    //     so that it will continue with 5 again    generate_n (back_inserter(coll),      // start                4,                        // number of elements                seq);                     // generates values    PRINT_ELEMENTS(coll);        // continue with first sequence again    generate_n (back_inserter(coll),      // start                4,                        // number of elements                seq);                     // generates values    PRINT_ELEMENTS(coll);}