#include <thread>
#include future>

void func( std::promise<int> && p, const int arg ) {
    p.set_value( arg << 1 );
}

int main( void ) {
    std::promise<int> p;
    auto f = p.get_future();
    int val = 6;
    std::thread t(&func, val );
    t.join();

    //do_stuff();

    int ret = f.get();
    return ret;
}


/*
uninteligible garbage from linker:

In file included from C:/mingw-w64/i686-4.9.2-posix-dwarf-rt_v3-rev1/mingw32/i68
6-w64-mingw32/include/c++/thread:39:0,
                 from promise.cpp:1:
C:/mingw-w64/i686-4.9.2-posix-dwarf-rt_v3-rev1/mingw32/i686-w64-mingw32/include/c++/functional: In instantiation of 'struct std::_Bind_simple<void (*(int))(std::promise<int>&&, int)>':
C:/mingw-w64/i686-4.9.2-posix-dwarf-rt_v3-rev1/mingw32/i686-w64-mingw32/include/c++/thread:137:47:   required from 'std::thread::thread(_Callable&&, _Args&& ...) [with _Callable = void (*)(std::promise<int>&&, int); _Args = {int&}]'
promise.cpp:12:27:   required from here
C:/mingw-w64/i686-4.9.2-posix-dwarf-rt_v3-rev1/mingw32/i686-w64-mingw32/include/c++/functional:1665:61: error: no type named 'type' in 'class std::result_of<void (*(int))(std::promise<int>&&, int)>'
       typedef typename result_of<_Callable(_Args...)>::type result_type;
                                                             ^
C:/mingw-w64/i686-4.9.2-posix-dwarf-rt_v3-rev1/mingw32/i686-w64-mingw32/include/c++/functional:1695:9: error: no type named 'type' in 'class std::result_of<void (*(int))(std::promise<int>&&, int)>'
         _M_invoke(_Index_tuple<_Indices...>)
         ^
*/