#include <boost/hana/functional/infix.hpp>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
//! Returns whether a structure contains a subset of the keys of
//! another structure.
//! @ingroup group-Searchable
constexpr auto operator()(Xs&& xs, Ys&& ys) const;
};
- constexpr auto is_subset = hana::infix(is_subset_t{});
+ BOOST_HANA_INLINE_VARIABLE constexpr auto is_subset = hana::infix(is_subset_t{});
#endif
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_FWD_IS_SUBSET_HPP