//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// Copyright (C) 2014 Vicente J. Botet Escriba
//
//  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)

// <boost/thread/future.hpp>

//  template< typename InputIterator>
//  future<vector<typename InputIterator::value_type>  >
//    when_any(InputIterator first, InputIterator last)

#include <boost/config.hpp>

#if ! defined  BOOST_NO_CXX11_DECLTYPE
#define BOOST_RESULT_OF_USE_DECLTYPE
#endif


#define BOOST_THREAD_VERSION 4

#include <boost/thread/future.hpp>
#include <boost/detail/lightweight_test.hpp>
#include <stdexcept>

#ifdef BOOST_MSVC
#pragma warning(disable: 4127) // conditional expression is constant
#endif

int p1()
{
  return 123;
}

int thr()
{
  throw std::logic_error("123");
}
int p2()
{
  boost::this_thread::sleep_for(boost::chrono::milliseconds(200));
  return 321;
}

int main()
{
#if defined BOOST_THREAD_PROVIDES_FUTURE_WHEN_ALL_WHEN_ANY
  if (0) // todo not yet implemented
  { // invalid future copy-constructible
    boost::csbl::vector<boost::future<int> > v;
    boost::future<int> f1;
    v.push_back(boost::move(f1));
    v.push_back(boost::make_ready_future(321));
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(v[1].valid());

    boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(! v[1].valid());
    BOOST_TEST(all.valid());
    boost::csbl::vector<boost::future<int> > res = all.get();
    BOOST_TEST(res.size() == 2);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    // has exception
    //BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // is_ready future copy-constructible
    boost::future<int> f1 = boost::make_ready_future(123);
    boost::future<int> f2 = boost::make_ready_future(321);
    boost::csbl::vector<boost::future<int> > v;
    v.push_back(boost::move(f1));
    v.push_back(boost::move(f2));
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[0].is_ready());
    BOOST_TEST(v[1].valid());
    BOOST_TEST(v[1].is_ready());
    boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(! v[1].valid());
    BOOST_TEST(all.valid());
    if (0) // todo FAILS not yet implemented
    BOOST_TEST(all.is_ready());
    boost::csbl::vector<boost::future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // is_ready shared_future copy-constructible
    boost::shared_future<int> f1 = boost::make_ready_future(123).share();
    boost::shared_future<int> f2 = boost::make_ready_future(321).share();
    boost::csbl::vector<boost::shared_future<int> > v;
    v.push_back(f1);
    v.push_back(f2);
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[0].is_ready());
    BOOST_TEST(v[1].valid());
    BOOST_TEST(v[1].is_ready());
    boost::future<boost::csbl::vector<boost::shared_future<int> > > all = boost::when_any(v.begin(), v.end());
    if (0) // fixme
    BOOST_TEST(v[0].valid());
    if (0) // fixme
    BOOST_TEST(v[1].valid());
    BOOST_TEST(all.valid());
    if (0) // todo FAILS not yet implemented
    BOOST_TEST(all.is_ready());
    boost::csbl::vector<boost::shared_future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // packaged_task future copy-constructible
    boost::packaged_task<int()> pt1(&p1);
    boost::future<int> f1 = pt1.get_future();
    BOOST_TEST(f1.valid());
    boost::packaged_task<int()> pt2(&p2);
    boost::future<int> f2 = pt2.get_future();
    BOOST_TEST(f2.valid());
    boost::csbl::vector<boost::future<int> > v;
    v.push_back(boost::move(f1));
    v.push_back(boost::move(f2));
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(! v[1].valid());
    BOOST_TEST(all.valid());
    pt1();
    pt2();
    boost::csbl::vector<boost::future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // packaged_task future copy-constructible
    boost::packaged_task<int()> pt1(&thr);
    boost::future<int> f1 = pt1.get_future();
    BOOST_TEST(f1.valid());
    boost::packaged_task<int()> pt2(&p2);
    boost::future<int> f2 = pt2.get_future();
    BOOST_TEST(f2.valid());
    boost::csbl::vector<boost::future<int> > v;
    v.push_back(boost::move(f1));
    v.push_back(boost::move(f2));
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(! v[1].valid());
    BOOST_TEST(all.valid());
    pt1();
    pt2();
    boost::csbl::vector<boost::future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    try {
      res[0].get();
      BOOST_TEST(false);
    } catch (std::logic_error& ex) {
      BOOST_TEST(ex.what() == std::string("123"));
    } catch (...) {
      BOOST_TEST(false);
    }
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // packaged_task shared_future copy-constructible
    boost::packaged_task<int()> pt1(&p1);
    boost::shared_future<int> f1 = pt1.get_future().share();
    BOOST_TEST(f1.valid());
    boost::packaged_task<int()> pt2(&p2);
    boost::shared_future<int> f2 = pt2.get_future().share();
    BOOST_TEST(f2.valid());
    boost::csbl::vector<boost::shared_future<int> > v;
    v.push_back(f1);
    v.push_back(f2);
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::shared_future<int> > > all = boost::when_any(v.begin(), v.end());
    if (0) // fixme
    BOOST_TEST(v[0].valid());
    if (0) // fixme
    BOOST_TEST(v[1].valid());
    BOOST_TEST(all.valid());
    BOOST_TEST(! all.is_ready());
    pt1();
    pt2();
    boost::this_thread::sleep_for(boost::chrono::milliseconds(300));
    BOOST_TEST(all.is_ready());
    boost::csbl::vector<boost::shared_future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // async future copy-constructible
    boost::future<int> f1 = boost::async(boost::launch::async, &p1);
    BOOST_TEST(f1.valid());
    boost::future<int> f2 = boost::async(boost::launch::async, &p2);
    BOOST_TEST(f2.valid());
    boost::csbl::vector<boost::future<int> > v;
    v.push_back(boost::move(f1));
    v.push_back(boost::move(f2));
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(! v[1].valid());
    BOOST_TEST(all.valid());
    boost::csbl::vector<boost::future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(! res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // async shared_future copy-constructible
    boost::shared_future<int> f1 = boost::async(boost::launch::async, &p1).share();
    BOOST_TEST(f1.valid());
    boost::shared_future<int> f2 = boost::async(boost::launch::async, &p2).share();
    BOOST_TEST(f2.valid());
    boost::csbl::vector<boost::shared_future<int> > v;
    v.push_back(f1);
    v.push_back(f2);
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::shared_future<int> > > all = boost::when_any(v.begin(), v.end());
    if (0) // fixme
    BOOST_TEST(v[0].valid());
    if (0) // fixme
    BOOST_TEST(v[1].valid());
    BOOST_TEST(all.valid());
    boost::csbl::vector<boost::shared_future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(! res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  { // async future copy-constructible
    boost::future<int> f1 = boost::async(boost::launch::async, &p1);
    BOOST_TEST(f1.valid());
    boost::future<int> f2 = boost::make_ready_future(321);
    BOOST_TEST(f2.valid());
    BOOST_TEST(f2.is_ready());
    boost::csbl::vector<boost::future<int> > v;
    v.push_back(boost::move(f1));
    v.push_back(boost::move(f2));
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(! v[1].valid());
    BOOST_TEST(all.valid());
    boost::csbl::vector<boost::future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    if (0) // fixme
    BOOST_TEST(! res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
#if defined BOOST_THREAD_PROVIDES_VARIADIC_THREAD
  // fixme darwin-4.8.0_11 terminate called without an active exception
  { // deferred future copy-constructible
    boost::future<int> f1 = boost::async(boost::launch::deferred, &p1);
    boost::future<int> f2 = boost::async(boost::launch::deferred, &p2);
    boost::csbl::vector<boost::future<int> > v;
    v.push_back(boost::move(f1));
    v.push_back(boost::move(f2));
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
    BOOST_TEST(! v[0].valid());
    BOOST_TEST(! v[1].valid());
    BOOST_TEST(all.valid());
    boost::csbl::vector<boost::future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(! res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
  // fixme darwin-4.8.0_11 terminate called without an active exception
  { // deferred shared_future copy-constructible
    boost::shared_future<int> f1 = boost::async(boost::launch::deferred, &p1).share();
    boost::shared_future<int> f2 = boost::async(boost::launch::deferred, &p2).share();
    boost::csbl::vector<boost::shared_future<int> > v;
    v.push_back(f1);
    v.push_back(f2);
    BOOST_TEST(v[0].valid());
    BOOST_TEST(v[1].valid());
    boost::future<boost::csbl::vector<boost::shared_future<int> > > all = boost::when_any(v.begin(), v.end());
    if (0) // fixme
    BOOST_TEST(v[0].valid());
    if (0) // fixme
    BOOST_TEST(v[1].valid());
    BOOST_TEST(all.valid());
    boost::csbl::vector<boost::shared_future<int> > res = all.get();
    BOOST_TEST(res[0].valid());
    BOOST_TEST(res[0].is_ready());
    BOOST_TEST(res[0].get() == 123);
    BOOST_TEST(res[1].valid());
    BOOST_TEST(! res[1].is_ready());
    BOOST_TEST(res[1].get() == 321);
  }
#endif
#if ! defined BOOST_NO_CXX11_LAMBDAS
    { // async futures copy-constructible then()
      boost::future<int> f1 = boost::async(boost::launch::async, &p1);
      BOOST_TEST(f1.valid());
      boost::future<int> f2 = boost::async(boost::launch::async, &p2);
      BOOST_TEST(f2.valid());
      boost::csbl::vector<boost::future<int> > v;
      v.push_back(boost::move(f1));
      v.push_back(boost::move(f2));
      BOOST_TEST(v[0].valid());
      BOOST_TEST(v[1].valid());
      boost::future<boost::csbl::vector<boost::future<int> > > all = boost::when_any(v.begin(), v.end());
      BOOST_TEST(! v[0].valid());
      BOOST_TEST(! v[1].valid());
      BOOST_TEST(all.valid());
      boost::future<int> sum = all.then([](boost::future<boost::csbl::vector<boost::future<int> > > f)
      {
        boost::csbl::vector<boost::future<int> > v = f.get();
        return v[0].get() + v[1].get();
      });
      BOOST_TEST(sum.valid());
      BOOST_TEST(sum.get() == 444);
    }
#endif
#endif

  return boost::report_errors();
}