text: 
  //          Copyright Oliver Kowalke 2009.
  // Distributed under the Boost Software License, Version 1.0.
  //    (See accompanying file LICENSE_1_0.txt or copy at
  //          http://www.boost.org/LICENSE_1_0.txt)
  
  #include <cstdlib>
  #include <iostream>
  
  #include <boost/bind.hpp>
  #include <boost/foreach.hpp>
  #include <boost/range.hpp>
  #include <boost/coroutine/all.hpp>
  
  void power( boost::coroutines::asymmetric_coroutine< int >::push_type & sink, int number, int exponent)
  {
      int counter = 0;
      int result = 1;
      while ( counter++ < exponent)
      {
              result = result * number;
              sink( result);
      }
  }
  
  int main()
  {
      {
          std::cout << "using range functions" << std::endl;
          boost::coroutines::asymmetric_coroutine< int >::pull_type source( boost::bind( power, _1, 2, 8) );
          boost::coroutines::asymmetric_coroutine< int >::pull_type::iterator e( boost::end( source) );
          for ( boost::coroutines::asymmetric_coroutine< int >::pull_type::iterator i( boost::begin( source) );
                i != e; ++i)
              std::cout << * i <<  " ";
      }
  
      {
          std::cout << "\nusing BOOST_FOREACH" << std::endl;
          boost::coroutines::asymmetric_coroutine< int >::pull_type source( boost::bind( power, _1, 2, 8) );
          BOOST_FOREACH( int i, source)
          { std::cout << i <<  " "; }
      }
  
      std::cout << "\nDone" << std::endl;
  
      return EXIT_SUCCESS;
  }
  