diff options
Diffstat (limited to 'boost/hana/concept/group.hpp')
-rw-r--r-- | boost/hana/concept/group.hpp | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/boost/hana/concept/group.hpp b/boost/hana/concept/group.hpp index 025537110a..5c8c34edf5 100644 --- a/boost/hana/concept/group.hpp +++ b/boost/hana/concept/group.hpp @@ -15,17 +15,20 @@ Distributed under the Boost Software License, Version 1.0. #include <boost/hana/config.hpp> #include <boost/hana/core/default.hpp> #include <boost/hana/core/tag_of.hpp> +#include <boost/hana/detail/integral_constant.hpp> #include <boost/hana/minus.hpp> #include <boost/hana/negate.hpp> BOOST_HANA_NAMESPACE_BEGIN template <typename G> - struct Group { - using Tag = typename tag_of<G>::type; - static constexpr bool value = !is_default<negate_impl<Tag>>::value || - !is_default<minus_impl<Tag, Tag>>::value; - }; + struct Group + : hana::integral_constant<bool, + !is_default<negate_impl<typename tag_of<G>::type>>::value || + !is_default<minus_impl<typename tag_of<G>::type, + typename tag_of<G>::type>>::value + > + { }; BOOST_HANA_NAMESPACE_END #endif // !BOOST_HANA_CONCEPT_GROUP_HPP |