ceph/src/boost/libs/asio/test/properties/cpp11/can_query_member.cpp

   1 //
   2 // cpp11/can_query_member.cpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2020 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   constexpr 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 constexpr bool value = true;
  30 };
  31
  32 } // namespace asio
  33 } // namespace boost
  34
  35 int main()
  36 {
  37   static_assert(boost::asio::can_query<object, prop>::value, "");
  38   static_assert(boost::asio::can_query<const object, prop>::value, "");
  39 }