{

BOOST_THREAD_LOG << "P1" << BOOST_THREAD_END_LOG;

return 123;

{

BOOST_THREAD_LOG << "<P2" << BOOST_THREAD_END_LOG;

boost::future<int> f1 = boost::async(boost::launch::async, &p1);

BOOST_THREAD_LOG << "P2>" << BOOST_THREAD_END_LOG;

return boost::move(f1);

{

const int number_of_tests = 100;

BOOST_THREAD_LOG << "<MAIN" << BOOST_THREAD_END_LOG;

for (int i=0; i< number_of_tests; i++)

try

{

#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES

{

boost::future<int> inner_future = boost::async(boost::launch::async, &p2).unwrap();

inner_future.wait();

int ii = inner_future.get();

BOOST_THREAD_LOG << "ii= "<< ii << "" << BOOST_THREAD_END_LOG;

}

#endif

{

boost::future<boost::future<int> > outer_future = boost::async(boost::launch::async, &p2);

boost::future<int> inner_future = outer_future.unwrap();

inner_future.wait();

int ii = inner_future.get();

BOOST_THREAD_LOG << "ii= "<< ii << "" << BOOST_THREAD_END_LOG;

}

{

boost::future<boost::future<int> > outer_future = boost::async(boost::launch::async, &p2);

boost::future<int> inner_future = outer_future.unwrap();

int ii = inner_future.get();

BOOST_THREAD_LOG << "ii= "<< ii << "" << BOOST_THREAD_END_LOG;

}

}

catch (std::exception& ex)

{

std::cout << "ERRORRRRR "<<ex.what() << "" << std::endl;

BOOST_THREAD_LOG << "ERRORRRRR "<<ex.what() << "" << BOOST_THREAD_END_LOG;

return 1;

}

catch (...)

{

std::cout << " ERRORRRRR exception thrown" << std::endl;

BOOST_THREAD_LOG << " ERRORRRRR exception thrown" << BOOST_THREAD_END_LOG;

return 2;

}

BOOST_THREAD_LOG << "MAIN>" << BOOST_THREAD_END_LOG;

return 0;