ceph/src/boost/libs/asio/test/archetypes/async_result.hpp

   1 //
   2 // async_result.hpp
   3 // ~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
   6 //
   7 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9 //
  10
  11 #ifndef ARCHETYPES_ASYNC_RESULT_HPP
  12 #define ARCHETYPES_ASYNC_RESULT_HPP
  13
  14 #include <boost/asio/async_result.hpp>
  15
  16 namespace archetypes {
  17
  18 struct lazy_handler
  19 {
  20 };
  21
  22 struct concrete_handler
  23 {
  24   concrete_handler(lazy_handler)
  25   {
  26   }
  27
  28   template <typename Arg1>
  29   void operator()(Arg1)
  30   {
  31   }
  32
  33   template <typename Arg1, typename Arg2>
  34   void operator()(Arg1, Arg2)
  35   {
  36   }
  37
  38 #if defined(BOOST_ASIO_HAS_MOVE)
  39   concrete_handler(concrete_handler&&) {}
  40 private:
  41   concrete_handler(const concrete_handler&);
  42 #endif // defined(BOOST_ASIO_HAS_MOVE)
  43 };
  44
  45 } // namespace archetypes
  46
  47 namespace boost {
  48 namespace asio {
  49
  50 template <typename Signature>
  51 class async_result<archetypes::lazy_handler, Signature>
  52 {
  53 public:
  54   // The concrete completion handler type.
  55   typedef archetypes::concrete_handler completion_handler_type;
  56
  57   // The return type of the initiating function.
  58   typedef int return_type;
  59
  60   // Construct an async_result from a given handler.
  61   explicit async_result(completion_handler_type&)
  62   {
  63   }
  64
  65   // Obtain the value to be returned from the initiating function.
  66   return_type get()
  67   {
  68     return 42;
  69   }
  70
  71 private:
  72   // Disallow copying and assignment.
  73   async_result(const async_result&) BOOST_ASIO_DELETED;
  74   async_result& operator=(const async_result&) BOOST_ASIO_DELETED;
  75 };
  76
  77 } // namespace asio
  78 } // namespace boost
  79
  80 #endif // ARCHETYPES_ASYNC_RESULT_HPP