Initial Commit

include/asio/detail/completion_message.hpp

@@ -0,0 +1,127 @@
+//
+// detail/completion_message.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2025 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)
+//
+
+#ifndef ASIO_DETAIL_COMPLETION_MESSAGE_HPP
+#define ASIO_DETAIL_COMPLETION_MESSAGE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/config.hpp"
+#include <tuple>
+#include "asio/detail/type_traits.hpp"
+#include "asio/detail/utility.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+template <typename Signature>
+class completion_message;
+
+template <typename R>
+class completion_message<R()>
+{
+public:
+  completion_message(int)
+  {
+  }
+
+  template <typename Handler>
+  void receive(Handler& handler)
+  {
+    static_cast<Handler&&>(handler)();
+  }
+};
+
+template <typename R, typename Arg0>
+class completion_message<R(Arg0)>
+{
+public:
+  template <typename T0>
+  completion_message(int, T0&& t0)
+    : arg0_(static_cast<T0&&>(t0))
+  {
+  }
+
+  template <typename Handler>
+  void receive(Handler& handler)
+  {
+    static_cast<Handler&&>(handler)(
+        static_cast<arg0_type&&>(arg0_));
+  }
+
+private:
+  typedef decay_t<Arg0> arg0_type;
+  arg0_type arg0_;
+};
+
+template <typename R, typename Arg0, typename Arg1>
+class completion_message<R(Arg0, Arg1)>
+{
+public:
+  template <typename T0, typename T1>
+  completion_message(int, T0&& t0, T1&& t1)
+    : arg0_(static_cast<T0&&>(t0)),
+      arg1_(static_cast<T1&&>(t1))
+  {
+  }
+
+  template <typename Handler>
+  void receive(Handler& handler)
+  {
+    static_cast<Handler&&>(handler)(
+        static_cast<arg0_type&&>(arg0_),
+        static_cast<arg1_type&&>(arg1_));
+  }
+
+private:
+  typedef decay_t<Arg0> arg0_type;
+  arg0_type arg0_;
+  typedef decay_t<Arg1> arg1_type;
+  arg1_type arg1_;
+};
+
+template <typename R, typename... Args>
+class completion_message<R(Args...)>
+{
+public:
+  template <typename... T>
+  completion_message(int, T&&... t)
+    : args_(static_cast<T&&>(t)...)
+  {
+  }
+
+  template <typename Handler>
+  void receive(Handler& h)
+  {
+    this->do_receive(h, asio::detail::index_sequence_for<Args...>());
+  }
+
+private:
+  template <typename Handler, std::size_t... I>
+  void do_receive(Handler& h, asio::detail::index_sequence<I...>)
+  {
+    static_cast<Handler&&>(h)(
+        std::get<I>(static_cast<args_type&&>(args_))...);
+  }
+
+  typedef std::tuple<decay_t<Args>...> args_type;
+  args_type args_;
+};
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_DETAIL_COMPLETION_MESSAGE_HPP