1 2 // Copyright Oliver Kowalke 2009. 3 // Distributed under the Boost Software License, Version 1.0. 4 // (See accompanying file LICENSE_1_0.txt or copy at 5 // http://www.boost.org/LICENSE_1_0.txt) 6 7 #include <boost/coroutine/all.hpp> 8 9 #include <cstdlib> 10 #include <iostream> 11 12 #include <boost/range.hpp> 13 fibonacci(boost::coroutines::asymmetric_coroutine<int>::push_type & sink)14void fibonacci( boost::coroutines::asymmetric_coroutine< int >::push_type & sink) 15 { 16 int first = 1, second = 1; 17 sink( first); 18 sink( second); 19 while ( true) 20 { 21 int third = first + second; 22 first = second; 23 second = third; 24 sink( third); 25 } 26 } 27 main()28int main() 29 { 30 boost::coroutines::asymmetric_coroutine< int >::pull_type source( fibonacci); 31 boost::range_iterator< 32 boost::coroutines::asymmetric_coroutine< int >::pull_type 33 >::type it( boost::begin( source) ); 34 for ( int i = 0; i < 10; ++i) 35 { 36 std::cout << * it << " "; 37 ++it; 38 } 39 40 std::cout << "\nDone" << std::endl; 41 42 return EXIT_SUCCESS; 43 } 44