namespace std { namespace experimental { namespace ranges { inline namespace v1 { // [meta.unary.prop], type properties: template <class T, class U> struct is_swappable_with; template <class T> struct is_swappable; template <class T, class U> struct is_nothrow_swappable_with; template <class T> struct is_nothrow_swappable; template <class T, class U> constexpr bool is_swappable_with_v = is_swappable_with<T, U>::value; template <class T> constexpr bool is_swappable_v = is_swappable<T>::value; template <class T, class U> constexpr bool is_nothrow_swappable_with_v = is_nothrow_swappable_with<T, U>::value; template <class T> constexpr bool is_nothrow_swappable_v = is_nothrow_swappable<T>::value; // [meta.trans.other], other transformations: template <class... T> struct common_type; template <class T, class U, template <class> class TQual, template <class> class UQual> struct basic_common_reference { }; template <class... T> struct common_reference; template <class... T> using common_type_t = typename common_type<T...>::type; template <class... T> using common_reference_t = typename common_reference<T...>::type; }}}}