text: 
  //          Copyright Oliver Kowalke 2013.
  // 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 <exception>
  #include <functional>
  #include <iostream>
  #include <string>
  
  #include <boost/fiber/all.hpp>
  
  inline
  int fn( std::string const& str, int n)
  {
  	for ( int i = 0; i < n; ++i)
  	{
  		std::cout << i << ": " << str << std::endl;
  		boost::this_fiber::yield();
  	}
  
      return n;
  }
  
  void start()
  {
      boost::fibers::future< int > fi(
          boost::fibers::async(
              std::bind( fn, "abc", 5) ) );
      fi.wait();
      std::cout << "fn() returned " << fi.get() << std::endl;
  }
  
  int main()
  {
  	try
  	{
          boost::fibers::fiber( start).join();
  		std::cout << "done." << std::endl;
  
  		return EXIT_SUCCESS;
  	}
  	catch ( std::exception const& e)
  	{ std::cerr << "exception: " << e.what() << std::endl; }
  	catch (...)
  	{ std::cerr << "unhandled exception" << std::endl; }
  	return EXIT_FAILURE;
  }
  