//
// as_tuple.cpp
// ~~~~~~~~~~~~
//
// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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)
//

// Disable autolinking for unit tests.
#if !defined(BOOST_ALL_NO_LIB)
#define BOOST_ALL_NO_LIB 1
#endif // !defined(BOOST_ALL_NO_LIB)

// Test that header file is self-contained.
#include "asio/as_tuple.hpp"

#include "asio/bind_executor.hpp"
#include "asio/deferred.hpp"
#include "asio/io_context.hpp"
#include "asio/post.hpp"
#include "asio/system_timer.hpp"
#include "asio/use_future.hpp"
#include "unit_test.hpp"

void as_tuple_test()
{
  asio::io_context io1;
  asio::io_context io2;
  asio::system_timer timer1(io1);
  int count = 0;

  timer1.expires_after(asio::chrono::seconds(0));
  timer1.async_wait(
      asio::as_tuple(
        asio::bind_executor(io2.get_executor(),
          [&count](std::tuple<asio::error_code>)
          {
            ++count;
          })));

  ASIO_CHECK(count == 0);

  io1.run();

  ASIO_CHECK(count == 0);

  io2.run();

  ASIO_CHECK(count == 1);

  timer1.async_wait(
      asio::as_tuple(
        asio::bind_executor(io2.get_executor(),
          asio::deferred)))(
            [&count](std::tuple<asio::error_code>)
            {
              ++count;
            });

  ASIO_CHECK(count == 1);

  io1.restart();
  io1.run();

  ASIO_CHECK(count == 1);

  io2.restart();
  io2.run();

  ASIO_CHECK(count == 2);

# if defined(ASIO_HAS_STD_FUTURE_CLASS)
  std::future<std::tuple<asio::error_code> > f = timer1.async_wait(
      asio::as_tuple(
        asio::bind_executor(io2.get_executor(),
          asio::use_future)));

  ASIO_CHECK(f.wait_for(std::chrono::seconds(0))
      == std::future_status::timeout);

  io1.restart();
  io1.run();

  ASIO_CHECK(f.wait_for(std::chrono::seconds(0))
      == std::future_status::timeout);

  io2.restart();
  io2.run();

  ASIO_CHECK(f.wait_for(std::chrono::seconds(0))
      == std::future_status::ready);
# endif // defined(ASIO_HAS_STD_FUTURE_CLASS)
}

void as_tuple_constness_test()
{
# if defined(ASIO_HAS_STD_FUTURE_CLASS)
  asio::io_context io1;
  asio::system_timer timer1(io1);

  auto tok1 = asio::as_tuple(asio::use_future);
  (void)timer1.async_wait(tok1);
  (void)timer1.async_wait(std::move(tok1));

  const auto tok2 = asio::as_tuple(asio::use_future);
  (void)timer1.async_wait(tok2);
  (void)timer1.async_wait(std::move(tok2));

  constexpr auto tok3 = asio::as_tuple(asio::use_future);
  (void)timer1.async_wait(tok3);
  (void)timer1.async_wait(std::move(tok3));
# endif // defined(ASIO_HAS_STD_FUTURE_CLASS)
}

ASIO_TEST_SUITE
(
  "as_tuple",
  ASIO_TEST_CASE(as_tuple_test)
  ASIO_COMPILE_TEST_CASE(as_tuple_constness_test)
)
