find_end.cpp

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#include <algorithm>   // for find_first_of(), find_end()
#include <functional>  // for equal_to
#include <iostream>    // for cout, endl
#include <iterator>    // for ostream_iterator
#include <list>        // for list
 
#include <examples.h>
 
 
int main ()
{
    typedef std::list<int, std::allocator<int> > List;
 
    const List::value_type a1[] = { 0, 1, 6, 5, 3, 2, 2, 6, 5, 7 };
    const List::value_type a2[] = { 6, 5, 0, 0 };
 
    // Set up two sequences.
    const List l1 (a1, a1 + sizeof a1 / sizeof *a1);
    const List l2 (a2, a2 + 2);
 
    // Try both find_first_of variants.
    List::const_iterator it1 =
        std::find_first_of (l1.begin (), l1.end (), l2.begin (), l2.end ());
 
    List::const_iterator it2 =
        std::find_first_of (l1.begin (), l1.end (), l2.begin (), l2.end (),
                            std::equal_to<List::value_type>());
 
    // Try both find_end variants.
    List::const_iterator it3 =
        std::find_end (l1.begin (), l1.end (), l2.begin (), l2.end ()); 
 
    List::const_iterator it4 =
        std::find_end (l1.begin (), l1.end (), l2.begin (), l2.end (),
                       std::equal_to<List::value_type>());
 
    // Output results of find_first_of.
    // Iterator now points to the first element that matches
    // one of a set of values.
 
    std::ostream_iterator<List::value_type, 
                          char,
                          std::char_traits<char> > out (std::cout, " " );
 
    if (it3 == it4 && it1 == it2) {
 
        std::cout << "For the sequences { ";
        std::copy (l1.begin (), l1.end (), out);
 
        std::cout << "} and { ";
        std::copy (l2.begin (), l2.end (), out);
             
        std::cout << "} \nboth versions of find_first_of point to: "
                  << *it1 << std::endl;
 
        // Output results of find_end.
        // Iterator now points to the first element of the last
        // find subsequence.
 
        std::cout << "both versions of find_end point to: "
                  << *it3 << std::endl;
    }
 
    return 0;
}