#include <cstddef>
-BOOST_HANA_NAMESPACE_BEGIN
+namespace boost { namespace hana {
//! Returns the `n`th element of an iterable.
//! @ingroup group-Iterable
//!
constexpr decltype(auto) operator()(Xs&& xs, N const& n) const;
};
- constexpr at_t at{};
+ BOOST_HANA_INLINE_VARIABLE constexpr at_t at{};
#endif
//! Equivalent to `at`; provided for convenience.
template <std::size_t n, typename Xs>
constexpr decltype(auto) at_c(Xs&& xs);
#endif
-BOOST_HANA_NAMESPACE_END
+}} // end namespace boost::hana
#endif // !BOOST_HANA_FWD_AT_HPP