ceph/src/boost/libs/asio/test/properties/cpp03/query_member.cpp

   1 //
   2 // cpp03/query_member.cpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2022 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 #include <boost/asio/query.hpp>
  12 #include <cassert>
  13
  14 struct prop
  15 {
  16 };
  17
  18 struct object
  19 {
  20   int query(prop) const { return 123; }
  21 };
  22
  23 namespace boost {
  24 namespace asio {
  25
  26 template<>
  27 struct is_applicable_property<object, prop>
  28 {
  29   static const bool value = true;
  30 };
  31
  32 namespace traits {
  33
  34 template<>
  35 struct query_member<object, prop>
  36 {
  37   static const bool is_valid = true;
  38   static const bool is_noexcept = true;
  39   typedef int result_type;
  40 };
  41
  42 } // namespace traits
  43 } // namespace asio
  44 } // namespace boost
  45
  46 int main()
  47 {
  48   object o1 = {};
  49   int result1 = boost::asio::query(o1, prop());
  50   assert(result1 == 123);
  51   (void)result1;
  52
  53   const object o2 = {};
  54   int result2 = boost::asio::query(o2, prop());
  55   assert(result2 == 123);
  56   (void)result2;
  57 }