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// Copyright (C) 2015 Vicente Botet
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#define BOOST_THREAD_VERSION 4
#include <boost/config.hpp>
#if ! defined BOOST_NO_CXX11_DECLTYPE
#define BOOST_RESULT_OF_USE_DECLTYPE
#endif
#include <boost/thread/future.hpp>
#include <boost/static_assert.hpp>
struct TestCallback
{
typedef boost::future<void> result_type;
result_type operator()(boost::future<void> future) const
{
future.get();
return boost::make_ready_future();
}
result_type operator()(boost::future<boost::future<void> > future) const
{
future.get();
return boost::make_ready_future();
}
};
void p1()
{
}
int main()
{
#if ! defined BOOST_NO_CXX11_DECLTYPE && ! defined BOOST_NO_CXX11_AUTO_DECLARATIONS
std::cout << __FILE__ << "[" << __LINE__ << "]" << std::endl;
{
auto f1 = boost::make_ready_future().then(TestCallback());
BOOST_STATIC_ASSERT(std::is_same<decltype(f1), boost::future<boost::future<void> > >::value);
f1.wait();
}
std::cout << __FILE__ << "[" << __LINE__ << "]" << std::endl;
{
auto f1 = boost::make_ready_future().then(TestCallback());
BOOST_STATIC_ASSERT(std::is_same<decltype(f1), boost::future<boost::future<void> > >::value);
auto f2 = f1.unwrap();
BOOST_STATIC_ASSERT(std::is_same<decltype(f2), boost::future<void> >::value);
f2.wait();
}
std::cout << __FILE__ << "[" << __LINE__ << "]" << std::endl;
{
auto f1 = boost::make_ready_future().then(TestCallback());
BOOST_STATIC_ASSERT(std::is_same<decltype(f1), boost::future<boost::future<void> > >::value);
auto f2 = f1.unwrap();
BOOST_STATIC_ASSERT(std::is_same<decltype(f2), boost::future<void> >::value);
auto f3 = f2.then(TestCallback());
BOOST_STATIC_ASSERT(std::is_same<decltype(f1), boost::future<boost::future<void> > >::value);
f3.wait();
}
std::cout << __FILE__ << "[" << __LINE__ << "]" << std::endl;
{
boost::make_ready_future().then(
TestCallback()).unwrap().then(TestCallback()).get();
}
std::cout << __FILE__ << "[" << __LINE__ << "]" << std::endl;
{
boost::future<void> f = boost::async(p1);
f.then(
TestCallback()).unwrap().then(TestCallback()).get();
}
#endif
return 0;
}
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