224 class ImmutableString {
237   ImmutableString() : len(0), base("") {}  in ImmutableString()  function
238   ImmutableString(const char *s, size_t slen)  in ImmutableString()  function
240   explicit ImmutableString(const char *s)  in ImmutableString()  function
242   explicit ImmutableString(const std::string &s)  in ImmutableString()  function
245   ImmutableString(InputIt first, InputIt last)  in ImmutableString()  function
247   ImmutableString(const ImmutableString &other)  in ImmutableString()  function
249   ImmutableString(ImmutableString &&other) noexcept  in ImmutableString()  function
251   ~ImmutableString() {  in ~ImmutableString()
257   ImmutableString &operator=(const ImmutableString &other) {
268   ImmutableString &operator=(ImmutableString &&other) noexcept {
280   template <size_t N> static ImmutableString from_lit(const char (&s)[N]) {  in from_lit()
281     return ImmutableString(s, N - 1);  in from_lit()
319 inline bool operator==(const ImmutableString &lhs, const ImmutableString &rhs) {
324 inline bool operator==(const ImmutableString &lhs, const std::string &rhs) {
329 inline bool operator==(const std::string &lhs, const ImmutableString &rhs) {
333 inline bool operator==(const ImmutableString &lhs, const char *rhs) {
338 inline bool operator==(const char *lhs, const ImmutableString &rhs) {
342 inline bool operator!=(const ImmutableString &lhs, const ImmutableString &rhs) {
346 inline bool operator!=(const ImmutableString &lhs, const std::string &rhs) {
350 inline bool operator!=(const std::string &lhs, const ImmutableString &rhs) {
354 inline bool operator!=(const ImmutableString &lhs, const char *rhs) {
358 inline bool operator!=(const char *lhs, const ImmutableString &rhs) {
362 inline std::ostream &operator<<(std::ostream &o, const ImmutableString &s) {
366 inline std::string &operator+=(std::string &lhs, const ImmutableString &rhs) {
391   explicit StringRef(const ImmutableString &s)  in StringRef()
470 inline bool operator==(const StringRef &lhs, const ImmutableString &rhs) {
475 inline bool operator==(const ImmutableString &lhs, const StringRef &rhs) {