Class impl_1_completion_arg

test/composed.cpp:122–151

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

class impl_1_completion_arg
{
public:
  explicit impl_1_completion_arg(boost::asio::io_context& ioc)
    : ioc_(ioc),
      state_(starting)
  {
  }

  template <typename Self>
  void operator()(Self& self)
  {
    switch (state_)
    {
    case starting:
      state_ = posting;
      boost::asio::post(ioc_, static_cast<Self&&>(self));
      break;
    case posting:
      self.complete(42);
      break;
    default:
      break;
    }
  }

private:
  boost::asio::io_context& ioc_;
  enum { starting, posting } state_;
};

template <typename CompletionToken>
BOOST_ASIO_INITFN_RESULT_TYPE(CompletionToken, void(int))