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

   1 //
   2 // cpp03/query_static.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 };
  21
  22 namespace boost {
  23 namespace asio {
  24
  25 template<>
  26 struct is_applicable_property<object, prop>
  27 {
  28   static const bool value = true;
  29 };
  30
  31 namespace traits {
  32
  33 template<>
  34 struct static_query<object, prop>
  35 {
  36   static const bool is_valid = true;
  37   static const bool is_noexcept = true;
  38   typedef int result_type;
  39   static int value() { return 123; }
  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 }