#include <boost/hana/core/when.hpp>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
//! Associative operation of a `Ring`.
//! @ingroup group-Ring
//!
constexpr decltype(auto) operator()(X&& x, Y&& y) const;
};
- constexpr mult_t mult{};
+ BOOST_HANA_INLINE_VARIABLE constexpr mult_t mult{};
#endif
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_FWD_MULT_HPP