#include <boost/hana/equal.hpp>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
namespace detail {
template <typename F>
struct equal_by {
return detail::equal_by<typename detail::decay<F>::type>{static_cast<F&&>(f)};
}
//! @endcond
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_COMPARING_HPP