| 1 | // Copyright (C) 2013 Vicente Botet |
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| 2 | // |
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| 3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
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| 4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | |
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| 6 | #include <iostream> |
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| 7 | |
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| 8 | #define USE_STD 0 |
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| 9 | #define USE_BOOST 1 |
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| 10 | |
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| 11 | #define USED_THREAD_API USE_BOOST |
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| 12 | //#define USED_THREAD_API USE_STD |
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| 13 | |
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| 14 | #if USED_THREAD_API == USE_BOOST |
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| 15 | |
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| 16 | # define BOOST_THREAD_VERSION 4 |
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| 17 | # include <boost/thread/future.hpp> |
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| 18 | |
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| 19 | using boost::future; |
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| 20 | using boost::async; |
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| 21 | |
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| 22 | #endif |
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| 23 | #if USED_THREAD_API == USE_STD |
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| 24 | # include <future> |
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| 25 | using std::future; |
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| 26 | using std::async; |
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| 27 | #endif |
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| 28 | |
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| 29 | |
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| 30 | |
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| 31 | future<void> do_something() |
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| 32 | { |
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| 33 | auto result = async( f: []{ std::cout<< "A\n" ; } ); |
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| 34 | std::cout << "B\n" ; |
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| 35 | return result; // error here |
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| 36 | } |
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| 37 | |
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| 38 | int main() |
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| 39 | { |
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| 40 | do_something().wait(); |
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| 41 | std::cout << "Hello, World!" << std::endl; |
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| 42 | return 0; |
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| 43 | } |
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| 44 | |
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