Function test_deferred

example/cpp20/operations/c_callback_wrapper.cpp:189–209

//------------------------------------------------------------------------------

void test_deferred()
{
  boost::asio::io_context io_context;

  // Test our asynchronous operation using the deferred completion token. This
  // token causes the operation's initiating function to package up the
  // operation with its arguments to return a function object, which may then be
  // used to launch the asynchronous operation.
  auto op = async_read_input("Enter your name", boost::asio::deferred);

  // Launch our asynchronous operation using a lambda as a callback. We will use
  // an io_context to obtain an associated executor.
  std::move(op)(
      boost::asio::bind_executor(io_context,
        [](const std::string& result)
        {
          std::cout << "Hello " << result << "\n";
        }));

  io_context.run();
}

//------------------------------------------------------------------------------