1 // 2 // cpp14/can_require_concept_static.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 template <typename> static constexpr bool static_query_v = true; valueprop20 static constexpr bool value() { return true; } 21 }; 22 23 template <int> 24 struct object 25 { 26 }; 27 main()28int main() 29 { 30 static_assert(boost::asio::can_require_concept_v<object<1>, prop<1>>, ""); 31 static_assert(boost::asio::can_require_concept_v<const object<1>, prop<1>>, ""); 32 } 33