Boost C++ Libraries of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for an old version of Boost. Click here to view this page for the latest version.


// (C) Copyright Jeremy Siek 2000-2004.
// 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 <boost/config.hpp>
#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>
#include <boost/iterator/counting_iterator.hpp>
#include <boost/iterator/indirect_iterator.hpp>
#include <boost/cstdlib.hpp>

int main(int, char*[])
  // Example of using counting_iterator
  std::cout << "counting from 0 to 4:" << std::endl;
  boost::counting_iterator<int> first(0), last(4);
  std::copy(first, last, std::ostream_iterator<int>(std::cout, " "));
  std::cout << std::endl;

  // Example of using counting iterator to create an array of pointers.
  int N = 7;
  std::vector<int> numbers;
  typedef std::vector<int>::iterator n_iter;
  // Fill "numbers" array with [0,N)
      , boost::counting_iterator<int>(N)
      , std::back_inserter(numbers));

  std::vector<std::vector<int>::iterator> pointers;

  // Use counting iterator to fill in the array of pointers.
  // causes an ICE with MSVC6

  // Use indirect iterator to print out numbers by accessing
  // them through the array of pointers.
  std::cout << "indirectly printing out the numbers from 0 to " 
            << N << std::endl;
            std::ostream_iterator<int>(std::cout, " "));
  std::cout << std::endl;
  return boost::exit_success;