Function test_spawn_cancel

test/spawn.cpp:122–162

}

void test_spawn_cancel()
{
  boost::asio::cancellation_signal sig;
  boost::asio::io_context ctx;

  std::exception_ptr result = nullptr;
  bool called = false;
  boost::asio::spawn(ctx, sleeping_coroutine,
      boost::asio::bind_cancellation_slot(sig.slot(),
        [&](std::exception_ptr e)
        {
          result = e;
          called = true;
        }));

  ctx.poll();
  BOOST_ASIO_CHECK(!ctx.stopped());

  BOOST_ASIO_CHECK(!called);
  BOOST_ASIO_CHECK(result == nullptr);

  sig.emit(boost::asio::cancellation_type::all);

  ctx.poll();
  BOOST_ASIO_CHECK(ctx.stopped());

  BOOST_ASIO_CHECK(called);
  BOOST_ASIO_CHECK(result != nullptr);
  try
  {
    std::rethrow_exception(result);
  }
  catch (const boost::system::system_error& e)
  {
    BOOST_ASIO_CHECK(e.code() == boost::asio::error::operation_aborted);
  }
  catch (...)
  {
    BOOST_ASIO_ERROR("expected system_error");
  }
}

void throwing_coroutine(boost::asio::yield_context)
{