sample8.cpp

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/*
Copyright(c) 2002-2005 Anatoliy Kuznetsov(anatoliy_kuznetsov at yahoo.com)

Permission is hereby granted, free of charge, to any person 
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and to permit persons to whom the Software is furnished to do so, 
subject to the following conditions:

The above copyright notice and this permission notice shall be included 
in all copies or substantial portions of the Software.

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/** \example sample8.cpp

    Example demonstrates some STL compatability set operations using
    set iterators.
 
  \sa bm::bvector<>::enumerator 
  \sa bm::bvector<>::insert_iterator

   For more information please visit:  http://bmagic.sourceforge.net

*/

#include <iostream>
#include <algorithm>
#include <vector>
#include <list>

using std::vector;
using std::list;

// This example requires STL compatibility
#ifdef BM_NO_STL
# undef BM_NO_STL
#endif

#include "bm.h"

using namespace std;

void Print(unsigned n)
{
    cout << n << endl;;
}

// Utility template function used to print container
template<class T> void PrintContainer(T first, T last)
{
    if (first == last)
        cout << "<EMPTY SET>";
    else
        for(;first != last; ++first)
            cout << *first << ";";
    cout << endl;
}

int main(void)
{
    bm::bvector<>   bv;    

    bv[10] = true;
    bv[100] = true;
    bv[10000] = true;
    
    cout << "Source set:";
    PrintContainer(bv.first(), bv.end());
    
    // copy all bitset information into STL vector using copy algorithm
    {
        vector<unsigned> vect;
        vect.resize(bv.count());
        std::copy(bv.first(), bv.end(), vect.begin());
        cout << "Vector:";
        PrintContainer(vect.begin(), vect.end());
    }

    // doing the same with the help of back_inserter

    {
        list<unsigned> lst;
        std::copy(bv.first(), bv.end(), std::back_inserter(lst));
        cout << "List:";
        PrintContainer(lst.begin(), lst.end());
    }

    {
        vector<unsigned>   vect;
        vector<unsigned>   res1, res2, res3;
        
        vect.push_back(100);
        vect.push_back(15);
        vect.push_back(150);
        
        cout << "Argument vector for set operations:";
        PrintContainer(vect.begin(), vect.end());
        
        // set should be ordered by < to make set algorithms possible
        std::sort(vect.begin(), vect.end());
        cout << endl;
        
        std::set_union(bv.first(), bv.end(),
                       vect.begin(), vect.end(),
                       std::back_inserter(res1)); //10;15;100;150;10000
        cout << "Set union:" << endl;
        PrintContainer(res1.begin(), res1.end());
        
        std::set_intersection(bv.first(), bv.end(),
                              vect.begin(), vect.end(),
                              std::back_inserter(res2));  // 100
        cout << "Set intersection:" << endl;
        PrintContainer(res2.begin(), res2.end());

        vector<unsigned>::const_iterator it1 = vect.begin();
        vector<unsigned>::const_iterator it2 = vect.end();
        bm::bvector<>::enumerator en = bv.first();
        bm::bvector<>::enumerator en2= bv.end();
        
        std::set_difference(en, en2,
                            it1, it2,
                            std::back_inserter(res3));  // 10;10000

        cout << "Set diff:" << endl;
        PrintContainer(res3.begin(), res3.end());
        
    }

    // Using bvector<>::insert_iterator to set bits
    {
        bm::bvector<> bv1;
        std::vector<unsigned> vect;
        
        vect.push_back(300);
        vect.push_back(200);
        vect.push_back(275);
        vect.push_back(200);
        
        cout << endl << "Source vector:";
        PrintContainer(vect.begin(), vect.end()); // 300;200;275;200;
        
        // The "side effect" of this operation is that we sorted
        // the input sequence and eliminated duplicates
        
        std::copy(vect.begin(), vect.end(), bv1.inserter());
        cout << "Bitset:";
        
        PrintContainer(bv1.first(), bv1.end());  // 200;275;300
    }
    
    
    return 0;
}

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