57   class Interned {
60     explicit Interned(Entry* entry) : entry_(entry) {}  in Interned()  function
61     Interned(const Interned& other) : entry_(other.entry_) {  in Interned()  function
66     Interned(Interned&& other) noexcept : entry_(other.entry_) {  in Interned()  function
70     Interned& operator=(Interned other) noexcept {
80     ~Interned() {  in ~Interned()
85     bool operator<(const Interned& other) const {
89     bool operator==(const Interned& other) const {
100   Interned Intern(U... args) {  in Intern()
113     return Interned(&entry);  in Intern()
128   static_assert(sizeof(Interned) == sizeof(void*),
133 void swap(typename Interner<T>::Interned a, typename Interner<T>::Interned b) {  in swap()
138 using Interned = typename Interner<T>::Interned;  variable