#include <type_traits>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
//! @cond
template <typename M>
constexpr decltype(auto) zero_t<M>::operator()() const {
static constexpr decltype(auto) apply()
{ return hana::to<C>(detail::constant_from_zero<C>{}); }
};
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_ZERO_HPP