ceph/src/boost/libs/thread/test/test_8674.cpp

   1 // Copyright (C) 2013 Vicente Botet
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include <iostream>
   7
   8 #define USE_STD 0
   9 #define USE_BOOST 1
  10
  11 #define USED_THREAD_API USE_BOOST
  12 //#define USED_THREAD_API USE_STD
  13
  14 #if USED_THREAD_API == USE_BOOST
  15
  16 # define BOOST_THREAD_VERSION 4
  17 # include <boost/thread/future.hpp>
  18
  19   using boost::future;
  20   using boost::async;
  21
  22 #endif
  23 #if USED_THREAD_API == USE_STD
  24 # include <future>
  25   using std::future;
  26   using std::async;
  27 #endif
  28
  29
  30
  31 future<void> do_something()
  32 {
  33   auto result = async( []{ std::cout<< "A\n"; } );
  34   std::cout << "B\n";
  35   return result; // error here
  36 }
  37
  38 int main()
  39 {
  40   do_something().wait();
  41   std::cout << "Hello, World!" << std::endl;
  42   return 0;
  43 }