1 // Copyright Louis Dionne 2013-2017 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) 4 5 #include <boost/hana/core/when.hpp> 6 7 #include <type_traits> 8 namespace hana = boost::hana; 9 10 11 template <typename T, typename = hana::when<true>> 12 struct base_template; 13 14 template <typename T> 15 struct base_template<T, hana::when<std::is_integral<T>::value>> { 16 // something useful... 17 }; 18 main()19int main() { } 20