Function make_convertible_timer

test/system_timer.cpp:408–414

    boost::asio::io_context::executor_type> io_context_system_timer;

io_context_system_timer make_convertible_timer(boost::asio::io_context& ioc, int* count)
{
  io_context_system_timer t(ioc);
  t.expires_after(boost::asio::chrono::seconds(1));
  t.async_wait(bindns::bind(increment, count));
  return t;
}

void system_timer_move_test()
{