ceph/src/boost/libs/asio/test/properties/cpp14/can_require_concept_member.cpp

   1 //
   2 // cpp14/can_require_concept_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/require_concept.hpp>
  12 #include <cassert>
  13
  14 template <int>
  15 struct prop
  16 {
  17   template <typename> static constexpr bool is_applicable_property_v = true;
  18   static constexpr bool is_requirable_concept = true;
  19 };
  20
  21 template <int>
  22 struct object
  23 {
  24   template <int N>
  25   constexpr object<N> require_concept(prop<N>) const
  26   {
  27     return object<N>();
  28   }
  29 };
  30
  31 int main()
  32 {
  33   static_assert(boost::asio::can_require_concept_v<object<1>, prop<2>>, "");
  34   static_assert(boost::asio::can_require_concept_v<const object<1>, prop<2>>, "");
  35 }