ceph/src/boost/libs/coroutine/example/asymmetric/exception.cpp

   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 #include <stdexcept>
  12 #include <string>
  13
  14 #include <boost/bind.hpp>
  15 #include <boost/throw_exception.hpp>
  16
  17 typedef boost::coroutines::asymmetric_coroutine< int >::pull_type pull_coro_t;
  18 typedef boost::coroutines::asymmetric_coroutine< int >::push_type push_coro_t;
  19
  20 struct my_exception : public std::runtime_error
  21 {
  22     my_exception( std::string const& str) :
  23         std::runtime_error( str)
  24     {}
  25 };
  26
  27 void echo( push_coro_t & sink, int j)
  28 {
  29     for ( int i = 0; i < j; ++i)
  30     {
  31         if ( i == 5) boost::throw_exception( my_exception("abc") );
  32         sink( i);
  33     }
  34 }
  35
  36 int main( int argc, char * argv[])
  37 {
  38     pull_coro_t source( boost::bind( echo, _1, 10) );
  39     try
  40     {
  41         while ( source)
  42         {
  43             std::cout << source.get() << std::endl;
  44             source();
  45         }
  46     }
  47     catch ( my_exception const& ex)
  48     { std::cout << "exception: " << ex.what() << std::endl; }
  49
  50     std::cout << "\nDone" << std::endl;
  51
  52     return EXIT_SUCCESS;
  53 }