1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_STRING 11#define _LIBCPP_STRING 12 13// clang-format off 14 15/* 16 string synopsis 17 18#include <compare> 19#include <initializer_list> 20 21namespace std 22{ 23 24template <class stateT> 25class fpos 26{ 27private: 28 stateT st; 29public: 30 fpos(streamoff = streamoff()); 31 32 operator streamoff() const; 33 34 stateT state() const; 35 void state(stateT); 36 37 fpos& operator+=(streamoff); 38 fpos operator+ (streamoff) const; 39 fpos& operator-=(streamoff); 40 fpos operator- (streamoff) const; 41}; 42 43template <class stateT> streamoff operator-(const fpos<stateT>& x, const fpos<stateT>& y); 44 45template <class stateT> bool operator==(const fpos<stateT>& x, const fpos<stateT>& y); 46template <class stateT> bool operator!=(const fpos<stateT>& x, const fpos<stateT>& y); 47 48template <class charT> 49struct char_traits 50{ 51 using char_type = charT; 52 using int_type = ...; 53 using off_type = streamoff; 54 using pos_type = streampos; 55 using state_type = mbstate_t; 56 using comparison_category = strong_ordering; // Since C++20 only for the specializations 57 // char, wchar_t, char8_t, char16_t, and char32_t. 58 59 static void assign(char_type& c1, const char_type& c2) noexcept; 60 static constexpr bool eq(char_type c1, char_type c2) noexcept; 61 static constexpr bool lt(char_type c1, char_type c2) noexcept; 62 63 static int compare(const char_type* s1, const char_type* s2, size_t n); 64 static size_t length(const char_type* s); 65 static const char_type* find(const char_type* s, size_t n, const char_type& a); 66 static char_type* move(char_type* s1, const char_type* s2, size_t n); 67 static char_type* copy(char_type* s1, const char_type* s2, size_t n); 68 static char_type* assign(char_type* s, size_t n, char_type a); 69 70 static constexpr int_type not_eof(int_type c) noexcept; 71 static constexpr char_type to_char_type(int_type c) noexcept; 72 static constexpr int_type to_int_type(char_type c) noexcept; 73 static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept; 74 static constexpr int_type eof() noexcept; 75}; 76 77template <> struct char_traits<char>; 78template <> struct char_traits<wchar_t>; 79template <> struct char_traits<char8_t>; // C++20 80template <> struct char_traits<char16_t>; 81template <> struct char_traits<char32_t>; 82 83template<class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> > 84class basic_string 85{ 86public: 87// types: 88 typedef traits traits_type; 89 typedef typename traits_type::char_type value_type; 90 typedef Allocator allocator_type; 91 typedef typename allocator_type::size_type size_type; 92 typedef typename allocator_type::difference_type difference_type; 93 typedef typename allocator_type::reference reference; 94 typedef typename allocator_type::const_reference const_reference; 95 typedef typename allocator_type::pointer pointer; 96 typedef typename allocator_type::const_pointer const_pointer; 97 typedef implementation-defined iterator; 98 typedef implementation-defined const_iterator; 99 typedef std::reverse_iterator<iterator> reverse_iterator; 100 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 101 102 static const size_type npos = -1; 103 104 basic_string() 105 noexcept(is_nothrow_default_constructible<allocator_type>::value); // constexpr since C++20 106 explicit basic_string(const allocator_type& a); // constexpr since C++20 107 basic_string(const basic_string& str); // constexpr since C++20 108 basic_string(basic_string&& str) 109 noexcept(is_nothrow_move_constructible<allocator_type>::value); // constexpr since C++20 110 basic_string(const basic_string& str, size_type pos, 111 const allocator_type& a = allocator_type()); // constexpr since C++20 112 basic_string(const basic_string& str, size_type pos, size_type n, 113 const Allocator& a = Allocator()); // constexpr since C++20 114 constexpr basic_string( 115 basic_string&& str, size_type pos, const Allocator& a = Allocator()); // since C++23 116 constexpr basic_string( 117 basic_string&& str, size_type pos, size_type n, const Allocator& a = Allocator()); // since C++23 118 template<class T> 119 basic_string(const T& t, size_type pos, size_type n, const Allocator& a = Allocator()); // C++17, constexpr since C++20 120 template <class T> 121 explicit basic_string(const T& t, const Allocator& a = Allocator()); // C++17, constexpr since C++20 122 basic_string(const value_type* s, const allocator_type& a = allocator_type()); // constexpr since C++20 123 basic_string(const value_type* s, size_type n, const allocator_type& a = allocator_type()); // constexpr since C++20 124 basic_string(nullptr_t) = delete; // C++23 125 basic_string(size_type n, value_type c, const allocator_type& a = allocator_type()); // constexpr since C++20 126 template<class InputIterator> 127 basic_string(InputIterator begin, InputIterator end, 128 const allocator_type& a = allocator_type()); // constexpr since C++20 129 template<container-compatible-range<charT> R> 130 constexpr basic_string(from_range_t, R&& rg, const Allocator& a = Allocator()); // since C++23 131 basic_string(initializer_list<value_type>, const Allocator& = Allocator()); // constexpr since C++20 132 basic_string(const basic_string&, const Allocator&); // constexpr since C++20 133 basic_string(basic_string&&, const Allocator&); // constexpr since C++20 134 135 ~basic_string(); // constexpr since C++20 136 137 operator basic_string_view<charT, traits>() const noexcept; // constexpr since C++20 138 139 basic_string& operator=(const basic_string& str); // constexpr since C++20 140 template <class T> 141 basic_string& operator=(const T& t); // C++17, constexpr since C++20 142 basic_string& operator=(basic_string&& str) 143 noexcept( 144 allocator_type::propagate_on_container_move_assignment::value || 145 allocator_type::is_always_equal::value ); // C++17, constexpr since C++20 146 basic_string& operator=(const value_type* s); // constexpr since C++20 147 basic_string& operator=(nullptr_t) = delete; // C++23 148 basic_string& operator=(value_type c); // constexpr since C++20 149 basic_string& operator=(initializer_list<value_type>); // constexpr since C++20 150 151 iterator begin() noexcept; // constexpr since C++20 152 const_iterator begin() const noexcept; // constexpr since C++20 153 iterator end() noexcept; // constexpr since C++20 154 const_iterator end() const noexcept; // constexpr since C++20 155 156 reverse_iterator rbegin() noexcept; // constexpr since C++20 157 const_reverse_iterator rbegin() const noexcept; // constexpr since C++20 158 reverse_iterator rend() noexcept; // constexpr since C++20 159 const_reverse_iterator rend() const noexcept; // constexpr since C++20 160 161 const_iterator cbegin() const noexcept; // constexpr since C++20 162 const_iterator cend() const noexcept; // constexpr since C++20 163 const_reverse_iterator crbegin() const noexcept; // constexpr since C++20 164 const_reverse_iterator crend() const noexcept; // constexpr since C++20 165 166 size_type size() const noexcept; // constexpr since C++20 167 size_type length() const noexcept; // constexpr since C++20 168 size_type max_size() const noexcept; // constexpr since C++20 169 size_type capacity() const noexcept; // constexpr since C++20 170 171 void resize(size_type n, value_type c); // constexpr since C++20 172 void resize(size_type n); // constexpr since C++20 173 174 template<class Operation> 175 constexpr void resize_and_overwrite(size_type n, Operation op); // since C++23 176 177 void reserve(size_type res_arg); // constexpr since C++20 178 void reserve(); // deprecated in C++20, removed in C++26 179 void shrink_to_fit(); // constexpr since C++20 180 void clear() noexcept; // constexpr since C++20 181 bool empty() const noexcept; // constexpr since C++20 182 183 const_reference operator[](size_type pos) const; // constexpr since C++20 184 reference operator[](size_type pos); // constexpr since C++20 185 186 const_reference at(size_type n) const; // constexpr since C++20 187 reference at(size_type n); // constexpr since C++20 188 189 basic_string& operator+=(const basic_string& str); // constexpr since C++20 190 template <class T> 191 basic_string& operator+=(const T& t); // C++17, constexpr since C++20 192 basic_string& operator+=(const value_type* s); // constexpr since C++20 193 basic_string& operator+=(value_type c); // constexpr since C++20 194 basic_string& operator+=(initializer_list<value_type>); // constexpr since C++20 195 196 basic_string& append(const basic_string& str); // constexpr since C++20 197 template <class T> 198 basic_string& append(const T& t); // C++17, constexpr since C++20 199 basic_string& append(const basic_string& str, size_type pos, size_type n=npos); // C++14, constexpr since C++20 200 template <class T> 201 basic_string& append(const T& t, size_type pos, size_type n=npos); // C++17, constexpr since C++20 202 basic_string& append(const value_type* s, size_type n); // constexpr since C++20 203 basic_string& append(const value_type* s); // constexpr since C++20 204 basic_string& append(size_type n, value_type c); // constexpr since C++20 205 template<class InputIterator> 206 basic_string& append(InputIterator first, InputIterator last); // constexpr since C++20 207 template<container-compatible-range<charT> R> 208 constexpr basic_string& append_range(R&& rg); // C++23 209 basic_string& append(initializer_list<value_type>); // constexpr since C++20 210 211 void push_back(value_type c); // constexpr since C++20 212 void pop_back(); // constexpr since C++20 213 reference front(); // constexpr since C++20 214 const_reference front() const; // constexpr since C++20 215 reference back(); // constexpr since C++20 216 const_reference back() const; // constexpr since C++20 217 218 basic_string& assign(const basic_string& str); // constexpr since C++20 219 template <class T> 220 basic_string& assign(const T& t); // C++17, constexpr since C++20 221 basic_string& assign(basic_string&& str); // constexpr since C++20 222 basic_string& assign(const basic_string& str, size_type pos, size_type n=npos); // C++14, constexpr since C++20 223 template <class T> 224 basic_string& assign(const T& t, size_type pos, size_type n=npos); // C++17, constexpr since C++20 225 basic_string& assign(const value_type* s, size_type n); // constexpr since C++20 226 basic_string& assign(const value_type* s); // constexpr since C++20 227 basic_string& assign(size_type n, value_type c); // constexpr since C++20 228 template<class InputIterator> 229 basic_string& assign(InputIterator first, InputIterator last); // constexpr since C++20 230 template<container-compatible-range<charT> R> 231 constexpr basic_string& assign_range(R&& rg); // C++23 232 basic_string& assign(initializer_list<value_type>); // constexpr since C++20 233 234 basic_string& insert(size_type pos1, const basic_string& str); // constexpr since C++20 235 template <class T> 236 basic_string& insert(size_type pos1, const T& t); // constexpr since C++20 237 basic_string& insert(size_type pos1, const basic_string& str, 238 size_type pos2, size_type n); // constexpr since C++20 239 template <class T> 240 basic_string& insert(size_type pos1, const T& t, size_type pos2, size_type n); // C++17, constexpr since C++20 241 basic_string& insert(size_type pos, const value_type* s, size_type n=npos); // C++14, constexpr since C++20 242 basic_string& insert(size_type pos, const value_type* s); // constexpr since C++20 243 basic_string& insert(size_type pos, size_type n, value_type c); // constexpr since C++20 244 iterator insert(const_iterator p, value_type c); // constexpr since C++20 245 iterator insert(const_iterator p, size_type n, value_type c); // constexpr since C++20 246 template<class InputIterator> 247 iterator insert(const_iterator p, InputIterator first, InputIterator last); // constexpr since C++20 248 template<container-compatible-range<charT> R> 249 constexpr iterator insert_range(const_iterator p, R&& rg); // C++23 250 iterator insert(const_iterator p, initializer_list<value_type>); // constexpr since C++20 251 252 basic_string& erase(size_type pos = 0, size_type n = npos); // constexpr since C++20 253 iterator erase(const_iterator position); // constexpr since C++20 254 iterator erase(const_iterator first, const_iterator last); // constexpr since C++20 255 256 basic_string& replace(size_type pos1, size_type n1, const basic_string& str); // constexpr since C++20 257 template <class T> 258 basic_string& replace(size_type pos1, size_type n1, const T& t); // C++17, constexpr since C++20 259 basic_string& replace(size_type pos1, size_type n1, const basic_string& str, 260 size_type pos2, size_type n2=npos); // C++14, constexpr since C++20 261 template <class T> 262 basic_string& replace(size_type pos1, size_type n1, const T& t, 263 size_type pos2, size_type n); // C++17, constexpr since C++20 264 basic_string& replace(size_type pos, size_type n1, const value_type* s, size_type n2); // constexpr since C++20 265 basic_string& replace(size_type pos, size_type n1, const value_type* s); // constexpr since C++20 266 basic_string& replace(size_type pos, size_type n1, size_type n2, value_type c); // constexpr since C++20 267 basic_string& replace(const_iterator i1, const_iterator i2, const basic_string& str); // constexpr since C++20 268 template <class T> 269 basic_string& replace(const_iterator i1, const_iterator i2, const T& t); // C++17, constexpr since C++20 270 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s, size_type n); // constexpr since C++20 271 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s); // constexpr since C++20 272 basic_string& replace(const_iterator i1, const_iterator i2, size_type n, value_type c); // constexpr since C++20 273 template<class InputIterator> 274 basic_string& replace(const_iterator i1, const_iterator i2, InputIterator j1, InputIterator j2); // constexpr since C++20 275 template<container-compatible-range<charT> R> 276 constexpr basic_string& replace_with_range(const_iterator i1, const_iterator i2, R&& rg); // C++23 277 basic_string& replace(const_iterator i1, const_iterator i2, initializer_list<value_type>); // constexpr since C++20 278 279 size_type copy(value_type* s, size_type n, size_type pos = 0) const; // constexpr since C++20 280 basic_string substr(size_type pos = 0, size_type n = npos) const; // constexpr in C++20, removed in C++23 281 basic_string substr(size_type pos = 0, size_type n = npos) const&; // since C++23 282 constexpr basic_string substr(size_type pos = 0, size_type n = npos) &&; // since C++23 283 void swap(basic_string& str) 284 noexcept(allocator_traits<allocator_type>::propagate_on_container_swap::value || 285 allocator_traits<allocator_type>::is_always_equal::value); // C++17, constexpr since C++20 286 287 const value_type* c_str() const noexcept; // constexpr since C++20 288 const value_type* data() const noexcept; // constexpr since C++20 289 value_type* data() noexcept; // C++17, constexpr since C++20 290 291 allocator_type get_allocator() const noexcept; // constexpr since C++20 292 293 size_type find(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 294 template <class T> 295 size_type find(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 296 size_type find(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 297 size_type find(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 298 size_type find(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 299 300 size_type rfind(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 301 template <class T> 302 size_type rfind(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 303 size_type rfind(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 304 size_type rfind(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 305 size_type rfind(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 306 307 size_type find_first_of(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 308 template <class T> 309 size_type find_first_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 310 size_type find_first_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 311 size_type find_first_of(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 312 size_type find_first_of(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 313 314 size_type find_last_of(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 315 template <class T> 316 size_type find_last_of(const T& t, size_type pos = npos) const noexcept noexcept; // C++17, noexcept as an extension, constexpr since C++20 317 size_type find_last_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 318 size_type find_last_of(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 319 size_type find_last_of(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 320 321 size_type find_first_not_of(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 322 template <class T> 323 size_type find_first_not_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 324 size_type find_first_not_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 325 size_type find_first_not_of(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 326 size_type find_first_not_of(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 327 328 size_type find_last_not_of(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 329 template <class T> 330 size_type find_last_not_of(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 331 size_type find_last_not_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 332 size_type find_last_not_of(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 333 size_type find_last_not_of(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 334 335 int compare(const basic_string& str) const noexcept; // constexpr since C++20 336 template <class T> 337 int compare(const T& t) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 338 int compare(size_type pos1, size_type n1, const basic_string& str) const; // constexpr since C++20 339 template <class T> 340 int compare(size_type pos1, size_type n1, const T& t) const; // C++17, constexpr since C++20 341 int compare(size_type pos1, size_type n1, const basic_string& str, 342 size_type pos2, size_type n2=npos) const; // C++14, constexpr since C++20 343 template <class T> 344 int compare(size_type pos1, size_type n1, const T& t, 345 size_type pos2, size_type n2=npos) const; // C++17, constexpr since C++20 346 int compare(const value_type* s) const noexcept; // constexpr since C++20 347 int compare(size_type pos1, size_type n1, const value_type* s) const; // constexpr since C++20 348 int compare(size_type pos1, size_type n1, const value_type* s, size_type n2) const; // constexpr since C++20 349 350 constexpr bool starts_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 351 constexpr bool starts_with(charT c) const noexcept; // C++20 352 constexpr bool starts_with(const charT* s) const; // C++20 353 constexpr bool ends_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 354 constexpr bool ends_with(charT c) const noexcept; // C++20 355 constexpr bool ends_with(const charT* s) const; // C++20 356 357 constexpr bool contains(basic_string_view<charT, traits> sv) const noexcept; // C++23 358 constexpr bool contains(charT c) const noexcept; // C++23 359 constexpr bool contains(const charT* s) const; // C++23 360}; 361 362template<class InputIterator, 363 class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 364basic_string(InputIterator, InputIterator, Allocator = Allocator()) 365 -> basic_string<typename iterator_traits<InputIterator>::value_type, 366 char_traits<typename iterator_traits<InputIterator>::value_type>, 367 Allocator>; // C++17 368 369template<ranges::input_range R, 370 class Allocator = allocator<ranges::range_value_t<R>>> 371 basic_string(from_range_t, R&&, Allocator = Allocator()) 372 -> basic_string<ranges::range_value_t<R>, char_traits<ranges::range_value_t<R>>, 373 Allocator>; // C++23 374 375template<class charT, 376 class traits, 377 class Allocator = allocator<charT>> 378 explicit basic_string(basic_string_view<charT, traits>, const Allocator& = Allocator()) 379 -> basic_string<charT, traits, Allocator>; // C++17 380 381template<class charT, 382 class traits, 383 class Allocator = allocator<charT>> 384 basic_string(basic_string_view<charT, traits>, 385 typename see below::size_type, typename see below::size_type, 386 const Allocator& = Allocator()) 387 -> basic_string<charT, traits, Allocator>; // C++17 388 389template<class charT, class traits, class Allocator> 390basic_string<charT, traits, Allocator> 391operator+(const basic_string<charT, traits, Allocator>& lhs, 392 const basic_string<charT, traits, Allocator>& rhs); // constexpr since C++20 393 394template<class charT, class traits, class Allocator> 395basic_string<charT, traits, Allocator> 396operator+(const charT* lhs , const basic_string<charT,traits,Allocator>&rhs); // constexpr since C++20 397 398template<class charT, class traits, class Allocator> 399basic_string<charT, traits, Allocator> 400operator+(charT lhs, const basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20 401 402template<class charT, class traits, class Allocator> 403basic_string<charT, traits, Allocator> 404operator+(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs); // constexpr since C++20 405 406template<class charT, class traits, class Allocator> 407basic_string<charT, traits, Allocator> 408operator+(const basic_string<charT, traits, Allocator>& lhs, charT rhs); // constexpr since C++20 409 410template<class charT, class traits, class Allocator> 411 constexpr basic_string<charT, traits, Allocator> 412 operator+(const basic_string<charT, traits, Allocator>& lhs, 413 type_identity_t<basic_string_view<charT, traits>> rhs); // Since C++26 414template<class charT, class traits, class Allocator> 415 constexpr basic_string<charT, traits, Allocator> 416 operator+(basic_string<charT, traits, Allocator>&& lhs, 417 type_identity_t<basic_string_view<charT, traits>> rhs); // Since C++26 418template<class charT, class traits, class Allocator> 419 constexpr basic_string<charT, traits, Allocator> 420 operator+(type_identity_t<basic_string_view<charT, traits>> lhs, 421 const basic_string<charT, traits, Allocator>& rhs); // Since C++26 422template<class charT, class traits, class Allocator> 423 constexpr basic_string<charT, traits, Allocator> 424 operator+(type_identity_t<basic_string_view<charT, traits>> lhs, 425 basic_string<charT, traits, Allocator>&& rhs); // Since C++26 426 427 428template<class charT, class traits, class Allocator> 429bool operator==(const basic_string<charT, traits, Allocator>& lhs, 430 const basic_string<charT, traits, Allocator>& rhs) noexcept; // constexpr since C++20 431 432template<class charT, class traits, class Allocator> 433bool operator==(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 434 435template<class charT, class traits, class Allocator> 436bool operator==(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs) noexcept; // constexpr since C++20 437 438template<class charT, class traits, class Allocator> 439bool operator!=(const basic_string<charT,traits,Allocator>& lhs, 440 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 441 442template<class charT, class traits, class Allocator> 443bool operator!=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 444 445template<class charT, class traits, class Allocator> 446bool operator!=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 447 448template<class charT, class traits, class Allocator> 449bool operator< (const basic_string<charT, traits, Allocator>& lhs, 450 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 451 452template<class charT, class traits, class Allocator> 453bool operator< (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 454 455template<class charT, class traits, class Allocator> 456bool operator< (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 457 458template<class charT, class traits, class Allocator> 459bool operator> (const basic_string<charT, traits, Allocator>& lhs, 460 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 461 462template<class charT, class traits, class Allocator> 463bool operator> (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 464 465template<class charT, class traits, class Allocator> 466bool operator> (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 467 468template<class charT, class traits, class Allocator> 469bool operator<=(const basic_string<charT, traits, Allocator>& lhs, 470 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 471 472template<class charT, class traits, class Allocator> 473bool operator<=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 474 475template<class charT, class traits, class Allocator> 476bool operator<=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 477 478template<class charT, class traits, class Allocator> 479bool operator>=(const basic_string<charT, traits, Allocator>& lhs, 480 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 481 482template<class charT, class traits, class Allocator> 483bool operator>=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 484 485template<class charT, class traits, class Allocator> 486bool operator>=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 487 488template<class charT, class traits, class Allocator> // since C++20 489constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, 490 const basic_string<charT, traits, Allocator>& rhs) noexcept; 491 492template<class charT, class traits, class Allocator> // since C++20 493constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, 494 const charT* rhs) noexcept; 495 496template<class charT, class traits, class Allocator> 497void swap(basic_string<charT, traits, Allocator>& lhs, 498 basic_string<charT, traits, Allocator>& rhs) 499 noexcept(noexcept(lhs.swap(rhs))); // constexpr since C++20 500 501template<class charT, class traits, class Allocator> 502basic_istream<charT, traits>& 503operator>>(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 504 505template<class charT, class traits, class Allocator> 506basic_ostream<charT, traits>& 507operator<<(basic_ostream<charT, traits>& os, const basic_string<charT, traits, Allocator>& str); 508 509template<class charT, class traits, class Allocator> 510basic_istream<charT, traits>& 511getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str, 512 charT delim); 513 514template<class charT, class traits, class Allocator> 515basic_istream<charT, traits>& 516getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 517 518template<class charT, class traits, class Allocator, class U> 519typename basic_string<charT, traits, Allocator>::size_type 520erase(basic_string<charT, traits, Allocator>& c, const U& value); // C++20 521template<class charT, class traits, class Allocator, class Predicate> 522typename basic_string<charT, traits, Allocator>::size_type 523erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred); // C++20 524 525typedef basic_string<char> string; 526typedef basic_string<wchar_t> wstring; 527typedef basic_string<char8_t> u8string; // C++20 528typedef basic_string<char16_t> u16string; 529typedef basic_string<char32_t> u32string; 530 531int stoi (const string& str, size_t* idx = nullptr, int base = 10); 532long stol (const string& str, size_t* idx = nullptr, int base = 10); 533unsigned long stoul (const string& str, size_t* idx = nullptr, int base = 10); 534long long stoll (const string& str, size_t* idx = nullptr, int base = 10); 535unsigned long long stoull(const string& str, size_t* idx = nullptr, int base = 10); 536 537float stof (const string& str, size_t* idx = nullptr); 538double stod (const string& str, size_t* idx = nullptr); 539long double stold(const string& str, size_t* idx = nullptr); 540 541string to_string(int val); 542string to_string(unsigned val); 543string to_string(long val); 544string to_string(unsigned long val); 545string to_string(long long val); 546string to_string(unsigned long long val); 547string to_string(float val); 548string to_string(double val); 549string to_string(long double val); 550 551int stoi (const wstring& str, size_t* idx = nullptr, int base = 10); 552long stol (const wstring& str, size_t* idx = nullptr, int base = 10); 553unsigned long stoul (const wstring& str, size_t* idx = nullptr, int base = 10); 554long long stoll (const wstring& str, size_t* idx = nullptr, int base = 10); 555unsigned long long stoull(const wstring& str, size_t* idx = nullptr, int base = 10); 556 557float stof (const wstring& str, size_t* idx = nullptr); 558double stod (const wstring& str, size_t* idx = nullptr); 559long double stold(const wstring& str, size_t* idx = nullptr); 560 561wstring to_wstring(int val); 562wstring to_wstring(unsigned val); 563wstring to_wstring(long val); 564wstring to_wstring(unsigned long val); 565wstring to_wstring(long long val); 566wstring to_wstring(unsigned long long val); 567wstring to_wstring(float val); 568wstring to_wstring(double val); 569wstring to_wstring(long double val); 570 571template <> struct hash<string>; 572template <> struct hash<u8string>; // C++20 573template <> struct hash<u16string>; 574template <> struct hash<u32string>; 575template <> struct hash<wstring>; 576 577basic_string<char> operator""s( const char *str, size_t len ); // C++14, constexpr since C++20 578basic_string<wchar_t> operator""s( const wchar_t *str, size_t len ); // C++14, constexpr since C++20 579constexpr basic_string<char8_t> operator""s( const char8_t *str, size_t len ); // C++20 580basic_string<char16_t> operator""s( const char16_t *str, size_t len ); // C++14, constexpr since C++20 581basic_string<char32_t> operator""s( const char32_t *str, size_t len ); // C++14, constexpr since C++20 582 583} // std 584 585*/ 586 587// clang-format on 588 589#include <__algorithm/max.h> 590#include <__algorithm/min.h> 591#include <__algorithm/remove.h> 592#include <__algorithm/remove_if.h> 593#include <__assert> 594#include <__config> 595#include <__debug_utils/sanitizers.h> 596#include <__format/enable_insertable.h> 597#include <__functional/hash.h> 598#include <__functional/unary_function.h> 599#include <__fwd/string.h> 600#include <__ios/fpos.h> 601#include <__iterator/bounded_iter.h> 602#include <__iterator/distance.h> 603#include <__iterator/iterator_traits.h> 604#include <__iterator/reverse_iterator.h> 605#include <__iterator/wrap_iter.h> 606#include <__memory/addressof.h> 607#include <__memory/allocate_at_least.h> 608#include <__memory/allocator.h> 609#include <__memory/allocator_traits.h> 610#include <__memory/compressed_pair.h> 611#include <__memory/construct_at.h> 612#include <__memory/pointer_traits.h> 613#include <__memory/swap_allocator.h> 614#include <__memory_resource/polymorphic_allocator.h> 615#include <__ranges/access.h> 616#include <__ranges/concepts.h> 617#include <__ranges/container_compatible_range.h> 618#include <__ranges/from_range.h> 619#include <__ranges/size.h> 620#include <__string/char_traits.h> 621#include <__string/extern_template_lists.h> 622#include <__type_traits/conditional.h> 623#include <__type_traits/is_allocator.h> 624#include <__type_traits/is_array.h> 625#include <__type_traits/is_convertible.h> 626#include <__type_traits/is_nothrow_assignable.h> 627#include <__type_traits/is_nothrow_constructible.h> 628#include <__type_traits/is_same.h> 629#include <__type_traits/is_standard_layout.h> 630#include <__type_traits/is_trivial.h> 631#include <__type_traits/is_trivially_relocatable.h> 632#include <__type_traits/noexcept_move_assign_container.h> 633#include <__type_traits/remove_cvref.h> 634#include <__type_traits/void_t.h> 635#include <__utility/auto_cast.h> 636#include <__utility/declval.h> 637#include <__utility/forward.h> 638#include <__utility/is_pointer_in_range.h> 639#include <__utility/move.h> 640#include <__utility/swap.h> 641#include <__utility/unreachable.h> 642#include <climits> 643#include <cstdio> // EOF 644#include <cstring> 645#include <limits> 646#include <stdexcept> 647#include <string_view> 648#include <version> 649 650#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 651# include <cwchar> 652#endif 653 654// standard-mandated includes 655 656// [iterator.range] 657#include <__iterator/access.h> 658#include <__iterator/data.h> 659#include <__iterator/empty.h> 660#include <__iterator/reverse_access.h> 661#include <__iterator/size.h> 662 663// [string.syn] 664#include <compare> 665#include <initializer_list> 666 667#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 668# pragma GCC system_header 669#endif 670 671_LIBCPP_PUSH_MACROS 672#include <__undef_macros> 673 674#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 675# define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS __attribute__((__no_sanitize__("address"))) 676// This macro disables AddressSanitizer (ASan) instrumentation for a specific function, 677// allowing memory accesses that would normally trigger ASan errors to proceed without crashing. 678// This is useful for accessing parts of objects memory, which should not be accessed, 679// such as unused bytes in short strings, that should never be accessed 680// by other parts of the program. 681#else 682# define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 683#endif 684 685_LIBCPP_BEGIN_NAMESPACE_STD 686 687// basic_string 688 689template <class _CharT, class _Traits, class _Allocator> 690basic_string<_CharT, _Traits, _Allocator> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 691operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const basic_string<_CharT, _Traits, _Allocator>& __y); 692 693template <class _CharT, class _Traits, class _Allocator> 694_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 695operator+(const _CharT* __x, const basic_string<_CharT, _Traits, _Allocator>& __y); 696 697template <class _CharT, class _Traits, class _Allocator> 698_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 699operator+(_CharT __x, const basic_string<_CharT, _Traits, _Allocator>& __y); 700 701template <class _CharT, class _Traits, class _Allocator> 702inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 703operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); 704 705template <class _CharT, class _Traits, class _Allocator> 706_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 707operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); 708 709#if _LIBCPP_STD_VER >= 26 710 711template <class _CharT, class _Traits, class _Allocator> 712_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 713operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 714 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs); 715 716template <class _CharT, class _Traits, class _Allocator> 717_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 718operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, type_identity_t<basic_string_view<_CharT, _Traits>> __rhs); 719 720template <class _CharT, class _Traits, class _Allocator> 721_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 722operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, 723 const basic_string<_CharT, _Traits, _Allocator>& __rhs); 724 725template <class _CharT, class _Traits, class _Allocator> 726_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 727operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs); 728 729#endif 730 731extern template _LIBCPP_EXPORTED_FROM_ABI string operator+ 732 <char, char_traits<char>, allocator<char> >(char const*, string const&); 733 734template <class _Iter> 735struct __string_is_trivial_iterator : public false_type {}; 736 737template <class _Tp> 738struct __string_is_trivial_iterator<_Tp*> : public is_arithmetic<_Tp> {}; 739 740template <class _Iter> 741struct __string_is_trivial_iterator<__wrap_iter<_Iter> > : public __string_is_trivial_iterator<_Iter> {}; 742 743template <class _CharT, class _Traits, class _Tp> 744struct __can_be_converted_to_string_view 745 : public _BoolConstant< is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && 746 !is_convertible<const _Tp&, const _CharT*>::value > {}; 747 748struct __uninitialized_size_tag {}; 749struct __init_with_sentinel_tag {}; 750 751template <class _CharT, class _Traits, class _Allocator> 752class basic_string { 753private: 754 using __default_allocator_type = allocator<_CharT>; 755 756public: 757 typedef basic_string __self; 758 typedef basic_string_view<_CharT, _Traits> __self_view; 759 typedef _Traits traits_type; 760 typedef _CharT value_type; 761 typedef _Allocator allocator_type; 762 typedef allocator_traits<allocator_type> __alloc_traits; 763 typedef typename __alloc_traits::size_type size_type; 764 typedef typename __alloc_traits::difference_type difference_type; 765 typedef value_type& reference; 766 typedef const value_type& const_reference; 767 typedef typename __alloc_traits::pointer pointer; 768 typedef typename __alloc_traits::const_pointer const_pointer; 769 770 // A basic_string contains the following members which may be trivially relocatable: 771 // - pointer: is currently assumed to be trivially relocatable, but is still checked in case that changes 772 // - size_type: is always trivially relocatable, since it has to be an integral type 773 // - value_type: is always trivially relocatable, since it has to be trivial 774 // - unsigned char: is a fundamental type, so it's trivially relocatable 775 // - allocator_type: may or may not be trivially relocatable, so it's checked 776 // 777 // This string implementation doesn't contain any references into itself. It only contains a bit that says whether 778 // it is in small or large string mode, so the entire structure is trivially relocatable if its members are. 779#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 780 // When compiling with AddressSanitizer (ASan), basic_string cannot be trivially 781 // relocatable. Because the object's memory might be poisoned when its content 782 // is kept inside objects memory (short string optimization), instead of in allocated 783 // external memory. In such cases, the destructor is responsible for unpoisoning 784 // the memory to avoid triggering false positives. 785 // Therefore it's crucial to ensure the destructor is called. 786 using __trivially_relocatable = void; 787#else 788 using __trivially_relocatable = __conditional_t< 789 __libcpp_is_trivially_relocatable<allocator_type>::value && __libcpp_is_trivially_relocatable<pointer>::value, 790 basic_string, 791 void>; 792#endif 793#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 794 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pointer __asan_volatile_wrapper(pointer const& __ptr) const { 795 if (__libcpp_is_constant_evaluated()) 796 return __ptr; 797 798 pointer volatile __copy_ptr = __ptr; 799 800 return const_cast<pointer&>(__copy_ptr); 801 } 802 803 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_pointer 804 __asan_volatile_wrapper(const_pointer const& __ptr) const { 805 if (__libcpp_is_constant_evaluated()) 806 return __ptr; 807 808 const_pointer volatile __copy_ptr = __ptr; 809 810 return const_cast<const_pointer&>(__copy_ptr); 811 } 812# define _LIBCPP_ASAN_VOLATILE_WRAPPER(PTR) __asan_volatile_wrapper(PTR) 813#else 814# define _LIBCPP_ASAN_VOLATILE_WRAPPER(PTR) PTR 815#endif 816 817 static_assert(!is_array<value_type>::value, "Character type of basic_string must not be an array"); 818 static_assert(is_standard_layout<value_type>::value, "Character type of basic_string must be standard-layout"); 819 static_assert(is_trivial<value_type>::value, "Character type of basic_string must be trivial"); 820 static_assert(is_same<_CharT, typename traits_type::char_type>::value, 821 "traits_type::char_type must be the same type as CharT"); 822 static_assert(is_same<typename allocator_type::value_type, value_type>::value, 823 "Allocator::value_type must be same type as value_type"); 824 static_assert(__check_valid_allocator<allocator_type>::value, ""); 825 826#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 827 // Users might provide custom allocators, and prior to C++20 we have no existing way to detect whether the allocator's 828 // pointer type is contiguous (though it has to be by the Standard). Using the wrapper type ensures the iterator is 829 // considered contiguous. 830 typedef __bounded_iter<__wrap_iter<pointer>> iterator; 831 typedef __bounded_iter<__wrap_iter<const_pointer>> const_iterator; 832#else 833 typedef __wrap_iter<pointer> iterator; 834 typedef __wrap_iter<const_pointer> const_iterator; 835#endif 836 typedef std::reverse_iterator<iterator> reverse_iterator; 837 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 838 839private: 840 static_assert(CHAR_BIT == 8, "This implementation assumes that one byte contains 8 bits"); 841 842#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 843 844 struct __long { 845 pointer __data_; 846 size_type __size_; 847 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 848 size_type __is_long_ : 1; 849 }; 850 851 enum { __min_cap = (sizeof(__long) - 1) / sizeof(value_type) > 2 ? (sizeof(__long) - 1) / sizeof(value_type) : 2 }; 852 853 struct __short { 854 value_type __data_[__min_cap]; 855 unsigned char __padding_[sizeof(value_type) - 1]; 856 unsigned char __size_ : 7; 857 unsigned char __is_long_ : 1; 858 }; 859 860 // The __endian_factor is required because the field we use to store the size 861 // has one fewer bit than it would if it were not a bitfield. 862 // 863 // If the LSB is used to store the short-flag in the short string representation, 864 // we have to multiply the size by two when it is stored and divide it by two when 865 // it is loaded to make sure that we always store an even number. In the long string 866 // representation, we can ignore this because we can assume that we always allocate 867 // an even amount of value_types. 868 // 869 // If the MSB is used for the short-flag, the max_size() is numeric_limits<size_type>::max() / 2. 870 // This does not impact the short string representation, since we never need the MSB 871 // for representing the size of a short string anyway. 872 873# ifdef _LIBCPP_BIG_ENDIAN 874 static const size_type __endian_factor = 2; 875# else 876 static const size_type __endian_factor = 1; 877# endif 878 879#else // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 880 881# ifdef _LIBCPP_BIG_ENDIAN 882 static const size_type __endian_factor = 1; 883# else 884 static const size_type __endian_factor = 2; 885# endif 886 887 // Attribute 'packed' is used to keep the layout compatible with the 888 // previous definition that did not use bit fields. This is because on 889 // some platforms bit fields have a default size rather than the actual 890 // size used, e.g., it is 4 bytes on AIX. See D128285 for details. 891 struct __long { 892 struct _LIBCPP_PACKED { 893 size_type __is_long_ : 1; 894 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 895 }; 896 size_type __size_; 897 pointer __data_; 898 }; 899 900 enum { __min_cap = (sizeof(__long) - 1) / sizeof(value_type) > 2 ? (sizeof(__long) - 1) / sizeof(value_type) : 2 }; 901 902 struct __short { 903 struct _LIBCPP_PACKED { 904 unsigned char __is_long_ : 1; 905 unsigned char __size_ : 7; 906 }; 907 char __padding_[sizeof(value_type) - 1]; 908 value_type __data_[__min_cap]; 909 }; 910 911#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 912 913 static_assert(sizeof(__short) == (sizeof(value_type) * (__min_cap + 1)), "__short has an unexpected size."); 914 915 union __rep { 916 __short __s; 917 __long __l; 918 }; 919 920 __compressed_pair<__rep, allocator_type> __r_; 921 922 // Construct a string with the given allocator and enough storage to hold `__size` characters, but 923 // don't initialize the characters. The contents of the string, including the null terminator, must be 924 // initialized separately. 925 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string( 926 __uninitialized_size_tag, size_type __size, const allocator_type& __a) 927 : __r_(__default_init_tag(), __a) { 928 if (__size > max_size()) 929 __throw_length_error(); 930 if (__fits_in_sso(__size)) { 931 __r_.first() = __rep(); 932 __set_short_size(__size); 933 } else { 934 auto __capacity = __recommend(__size) + 1; 935 auto __allocation = __alloc_traits::allocate(__alloc(), __capacity); 936 __begin_lifetime(__allocation, __capacity); 937 __set_long_cap(__capacity); 938 __set_long_pointer(__allocation); 939 __set_long_size(__size); 940 } 941 __annotate_new(__size); 942 } 943 944 template <class _Iter, class _Sent> 945 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 946 basic_string(__init_with_sentinel_tag, _Iter __first, _Sent __last, const allocator_type& __a) 947 : __r_(__default_init_tag(), __a) { 948 __init_with_sentinel(std::move(__first), std::move(__last)); 949 } 950 951 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator __make_iterator(pointer __p) { 952#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 953 // Bound the iterator according to the size (and not the capacity, unlike vector). 954 // 955 // By the Standard, string iterators are generally not guaranteed to stay valid when the container is modified, 956 // regardless of whether reallocation occurs. This allows us to check for out-of-bounds accesses using logical size, 957 // a stricter check, since correct code can never rely on being able to access newly-added elements via an existing 958 // iterator. 959 return std::__make_bounded_iter( 960 std::__wrap_iter<pointer>(__p), 961 std::__wrap_iter<pointer>(__get_pointer()), 962 std::__wrap_iter<pointer>(__get_pointer() + size())); 963#else 964 return iterator(__p); 965#endif // _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 966 } 967 968 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator __make_const_iterator(const_pointer __p) const { 969#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 970 // Bound the iterator according to the size (and not the capacity, unlike vector). 971 return std::__make_bounded_iter( 972 std::__wrap_iter<const_pointer>(__p), 973 std::__wrap_iter<const_pointer>(__get_pointer()), 974 std::__wrap_iter<const_pointer>(__get_pointer() + size())); 975#else 976 return const_iterator(__p); 977#endif // _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 978 } 979 980public: 981 _LIBCPP_TEMPLATE_DATA_VIS static const size_type npos = -1; 982 983 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string() 984 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value) 985 : __r_(__value_init_tag(), __default_init_tag()) { 986 __annotate_new(0); 987 } 988 989 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const allocator_type& __a) 990#if _LIBCPP_STD_VER <= 14 991 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value) 992#else 993 _NOEXCEPT 994#endif 995 : __r_(__value_init_tag(), __a) { 996 __annotate_new(0); 997 } 998 999 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string(const basic_string& __str) 1000 : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) { 1001 if (!__str.__is_long()) { 1002 __r_.first() = __str.__r_.first(); 1003 __annotate_new(__get_short_size()); 1004 } else 1005 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1006 } 1007 1008 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 1009 basic_string(const basic_string& __str, const allocator_type& __a) 1010 : __r_(__default_init_tag(), __a) { 1011 if (!__str.__is_long()) { 1012 __r_.first() = __str.__r_.first(); 1013 __annotate_new(__get_short_size()); 1014 } else 1015 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1016 } 1017 1018#ifndef _LIBCPP_CXX03_LANG 1019 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str) 1020# if _LIBCPP_STD_VER <= 14 1021 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value) 1022# else 1023 _NOEXCEPT 1024# endif 1025 // Turning off ASan instrumentation for variable initialization with _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 1026 // does not work consistently during initialization of __r_, so we instead unpoison __str's memory manually first. 1027 // __str's memory needs to be unpoisoned only in the case where it's a short string. 1028 : __r_([](basic_string& __s) -> decltype(__s.__r_)&& { 1029 if (!__s.__is_long()) 1030 __s.__annotate_delete(); 1031 return std::move(__s.__r_); 1032 }(__str)) { 1033 __str.__r_.first() = __rep(); 1034 __str.__annotate_new(0); 1035 if (!__is_long()) 1036 __annotate_new(size()); 1037 } 1038 1039 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str, const allocator_type& __a) 1040 : __r_(__default_init_tag(), __a) { 1041 if (__str.__is_long() && __a != __str.__alloc()) // copy, not move 1042 __init(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1043 else { 1044 if (__libcpp_is_constant_evaluated()) 1045 __r_.first() = __rep(); 1046 if (!__str.__is_long()) 1047 __str.__annotate_delete(); 1048 __r_.first() = __str.__r_.first(); 1049 __str.__r_.first() = __rep(); 1050 __str.__annotate_new(0); 1051 if (!__is_long() && this != &__str) 1052 __annotate_new(size()); 1053 } 1054 } 1055#endif // _LIBCPP_CXX03_LANG 1056 1057 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 1058 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s) 1059 : __r_(__default_init_tag(), __default_init_tag()) { 1060 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "basic_string(const char*) detected nullptr"); 1061 __init(__s, traits_type::length(__s)); 1062 } 1063 1064 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 1065 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, const _Allocator& __a) 1066 : __r_(__default_init_tag(), __a) { 1067 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); 1068 __init(__s, traits_type::length(__s)); 1069 } 1070 1071#if _LIBCPP_STD_VER >= 23 1072 basic_string(nullptr_t) = delete; 1073#endif 1074 1075 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, size_type __n) 1076 : __r_(__default_init_tag(), __default_init_tag()) { 1077 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); 1078 __init(__s, __n); 1079 } 1080 1081 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1082 basic_string(const _CharT* __s, size_type __n, const _Allocator& __a) 1083 : __r_(__default_init_tag(), __a) { 1084 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "basic_string(const char*, n, allocator) detected nullptr"); 1085 __init(__s, __n); 1086 } 1087 1088 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c) 1089 : __r_(__default_init_tag(), __default_init_tag()) { 1090 __init(__n, __c); 1091 } 1092 1093#if _LIBCPP_STD_VER >= 23 1094 _LIBCPP_HIDE_FROM_ABI constexpr basic_string( 1095 basic_string&& __str, size_type __pos, const _Allocator& __alloc = _Allocator()) 1096 : basic_string(std::move(__str), __pos, npos, __alloc) {} 1097 1098 _LIBCPP_HIDE_FROM_ABI constexpr basic_string( 1099 basic_string&& __str, size_type __pos, size_type __n, const _Allocator& __alloc = _Allocator()) 1100 : __r_(__default_init_tag(), __alloc) { 1101 if (__pos > __str.size()) 1102 __throw_out_of_range(); 1103 1104 auto __len = std::min<size_type>(__n, __str.size() - __pos); 1105 if (__alloc_traits::is_always_equal::value || __alloc == __str.__alloc()) { 1106 __move_assign(std::move(__str), __pos, __len); 1107 } else { 1108 // Perform a copy because the allocators are not compatible. 1109 __init(__str.data() + __pos, __len); 1110 } 1111 } 1112#endif 1113 1114 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 1115 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c, const _Allocator& __a) 1116 : __r_(__default_init_tag(), __a) { 1117 __init(__n, __c); 1118 } 1119 1120 _LIBCPP_CONSTEXPR_SINCE_CXX20 1121 basic_string(const basic_string& __str, size_type __pos, size_type __n, const _Allocator& __a = _Allocator()) 1122 : __r_(__default_init_tag(), __a) { 1123 size_type __str_sz = __str.size(); 1124 if (__pos > __str_sz) 1125 __throw_out_of_range(); 1126 __init(__str.data() + __pos, std::min(__n, __str_sz - __pos)); 1127 } 1128 1129 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1130 basic_string(const basic_string& __str, size_type __pos, const _Allocator& __a = _Allocator()) 1131 : __r_(__default_init_tag(), __a) { 1132 size_type __str_sz = __str.size(); 1133 if (__pos > __str_sz) 1134 __throw_out_of_range(); 1135 __init(__str.data() + __pos, __str_sz - __pos); 1136 } 1137 1138 template <class _Tp, 1139 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1140 !__is_same_uncvref<_Tp, basic_string>::value, 1141 int> = 0> 1142 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1143 basic_string(const _Tp& __t, size_type __pos, size_type __n, const allocator_type& __a = allocator_type()) 1144 : __r_(__default_init_tag(), __a) { 1145 __self_view __sv0 = __t; 1146 __self_view __sv = __sv0.substr(__pos, __n); 1147 __init(__sv.data(), __sv.size()); 1148 } 1149 1150 template <class _Tp, 1151 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1152 !__is_same_uncvref<_Tp, basic_string>::value, 1153 int> = 0> 1154 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const _Tp& __t) 1155 : __r_(__default_init_tag(), __default_init_tag()) { 1156 __self_view __sv = __t; 1157 __init(__sv.data(), __sv.size()); 1158 } 1159 1160 template <class _Tp, 1161 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1162 !__is_same_uncvref<_Tp, basic_string>::value, 1163 int> = 0> 1164 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1165 _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const _Tp& __t, const allocator_type& __a) 1166 : __r_(__default_init_tag(), __a) { 1167 __self_view __sv = __t; 1168 __init(__sv.data(), __sv.size()); 1169 } 1170 1171 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1172 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(_InputIterator __first, _InputIterator __last) 1173 : __r_(__default_init_tag(), __default_init_tag()) { 1174 __init(__first, __last); 1175 } 1176 1177 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1178 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1179 basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a) 1180 : __r_(__default_init_tag(), __a) { 1181 __init(__first, __last); 1182 } 1183 1184#if _LIBCPP_STD_VER >= 23 1185 template <_ContainerCompatibleRange<_CharT> _Range> 1186 _LIBCPP_HIDE_FROM_ABI constexpr basic_string( 1187 from_range_t, _Range&& __range, const allocator_type& __a = allocator_type()) 1188 : __r_(__default_init_tag(), __a) { 1189 if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { 1190 __init_with_size(ranges::begin(__range), ranges::end(__range), ranges::distance(__range)); 1191 } else { 1192 __init_with_sentinel(ranges::begin(__range), ranges::end(__range)); 1193 } 1194 } 1195#endif 1196 1197#ifndef _LIBCPP_CXX03_LANG 1198 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il) 1199 : __r_(__default_init_tag(), __default_init_tag()) { 1200 __init(__il.begin(), __il.end()); 1201 } 1202 1203 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il, const _Allocator& __a) 1204 : __r_(__default_init_tag(), __a) { 1205 __init(__il.begin(), __il.end()); 1206 } 1207#endif // _LIBCPP_CXX03_LANG 1208 1209 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 ~basic_string() { 1210 __annotate_delete(); 1211 if (__is_long()) 1212 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 1213 } 1214 1215 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 operator __self_view() const _NOEXCEPT { 1216 return __self_view(data(), size()); 1217 } 1218 1219 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string& 1220 operator=(const basic_string& __str); 1221 1222 template <class _Tp, 1223 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1224 !__is_same_uncvref<_Tp, basic_string>::value, 1225 int> = 0> 1226 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const _Tp& __t) { 1227 __self_view __sv = __t; 1228 return assign(__sv); 1229 } 1230 1231#ifndef _LIBCPP_CXX03_LANG 1232 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1233 operator=(basic_string&& __str) noexcept(__noexcept_move_assign_container<_Allocator, __alloc_traits>::value) { 1234 __move_assign(__str, integral_constant<bool, __alloc_traits::propagate_on_container_move_assignment::value>()); 1235 return *this; 1236 } 1237 1238 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(initializer_list<value_type> __il) { 1239 return assign(__il.begin(), __il.size()); 1240 } 1241#endif 1242 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const value_type* __s) { 1243 return assign(__s); 1244 } 1245#if _LIBCPP_STD_VER >= 23 1246 basic_string& operator=(nullptr_t) = delete; 1247#endif 1248 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(value_type __c); 1249 1250 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator begin() _NOEXCEPT { 1251 return __make_iterator(__get_pointer()); 1252 } 1253 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator begin() const _NOEXCEPT { 1254 return __make_const_iterator(__get_pointer()); 1255 } 1256 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator end() _NOEXCEPT { 1257 return __make_iterator(__get_pointer() + size()); 1258 } 1259 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator end() const _NOEXCEPT { 1260 return __make_const_iterator(__get_pointer() + size()); 1261 } 1262 1263 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reverse_iterator rbegin() _NOEXCEPT { 1264 return reverse_iterator(end()); 1265 } 1266 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator rbegin() const _NOEXCEPT { 1267 return const_reverse_iterator(end()); 1268 } 1269 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reverse_iterator rend() _NOEXCEPT { 1270 return reverse_iterator(begin()); 1271 } 1272 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator rend() const _NOEXCEPT { 1273 return const_reverse_iterator(begin()); 1274 } 1275 1276 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator cbegin() const _NOEXCEPT { return begin(); } 1277 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator cend() const _NOEXCEPT { return end(); } 1278 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator crbegin() const _NOEXCEPT { 1279 return rbegin(); 1280 } 1281 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator crend() const _NOEXCEPT { return rend(); } 1282 1283 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type size() const _NOEXCEPT { 1284 return __is_long() ? __get_long_size() : __get_short_size(); 1285 } 1286 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type length() const _NOEXCEPT { return size(); } 1287 1288 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type max_size() const _NOEXCEPT { 1289 size_type __m = __alloc_traits::max_size(__alloc()); 1290 if (__m <= std::numeric_limits<size_type>::max() / 2) { 1291 return __m - __alignment; 1292 } else { 1293 bool __uses_lsb = __endian_factor == 2; 1294 return __uses_lsb ? __m - __alignment : (__m / 2) - __alignment; 1295 } 1296 } 1297 1298 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type capacity() const _NOEXCEPT { 1299 return (__is_long() ? __get_long_cap() : static_cast<size_type>(__min_cap)) - 1; 1300 } 1301 1302 _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n, value_type __c); 1303 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n) { resize(__n, value_type()); } 1304 1305 _LIBCPP_CONSTEXPR_SINCE_CXX20 void reserve(size_type __requested_capacity); 1306 1307#if _LIBCPP_STD_VER >= 23 1308 template <class _Op> 1309 _LIBCPP_HIDE_FROM_ABI constexpr void resize_and_overwrite(size_type __n, _Op __op) { 1310 __resize_default_init(__n); 1311 __erase_to_end(std::move(__op)(data(), _LIBCPP_AUTO_CAST(__n))); 1312 } 1313#endif 1314 1315 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __resize_default_init(size_type __n); 1316 1317#if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRING_RESERVE) 1318 _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_HIDE_FROM_ABI void reserve() _NOEXCEPT { shrink_to_fit(); } 1319#endif 1320 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void shrink_to_fit() _NOEXCEPT; 1321 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void clear() _NOEXCEPT; 1322 1323 _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool empty() const _NOEXCEPT { 1324 return size() == 0; 1325 } 1326 1327 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference operator[](size_type __pos) const _NOEXCEPT { 1328 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); 1329 if (__builtin_constant_p(__pos) && !__fits_in_sso(__pos)) { 1330 return *(__get_long_pointer() + __pos); 1331 } 1332 return *(data() + __pos); 1333 } 1334 1335 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator[](size_type __pos) _NOEXCEPT { 1336 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); 1337 if (__builtin_constant_p(__pos) && !__fits_in_sso(__pos)) { 1338 return *(__get_long_pointer() + __pos); 1339 } 1340 return *(__get_pointer() + __pos); 1341 } 1342 1343 _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference at(size_type __n) const; 1344 _LIBCPP_CONSTEXPR_SINCE_CXX20 reference at(size_type __n); 1345 1346 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const basic_string& __str) { 1347 return append(__str); 1348 } 1349 1350 template <class _Tp, 1351 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1352 !__is_same_uncvref<_Tp, basic_string >::value, 1353 int> = 0> 1354 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1355 operator+=(const _Tp& __t) { 1356 __self_view __sv = __t; 1357 return append(__sv); 1358 } 1359 1360 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const value_type* __s) { 1361 return append(__s); 1362 } 1363 1364 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(value_type __c) { 1365 push_back(__c); 1366 return *this; 1367 } 1368 1369#ifndef _LIBCPP_CXX03_LANG 1370 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(initializer_list<value_type> __il) { 1371 return append(__il); 1372 } 1373#endif // _LIBCPP_CXX03_LANG 1374 1375 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str) { 1376 return append(__str.data(), __str.size()); 1377 } 1378 1379 template <class _Tp, 1380 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1381 !__is_same_uncvref<_Tp, basic_string>::value, 1382 int> = 0> 1383 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1384 append(const _Tp& __t) { 1385 __self_view __sv = __t; 1386 return append(__sv.data(), __sv.size()); 1387 } 1388 1389 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str, size_type __pos, size_type __n = npos); 1390 1391 template <class _Tp, 1392 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1393 !__is_same_uncvref<_Tp, basic_string>::value, 1394 int> = 0> 1395 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1396 1397 basic_string& 1398 append(const _Tp& __t, size_type __pos, size_type __n = npos); 1399 1400 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s, size_type __n); 1401 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s); 1402 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(size_type __n, value_type __c); 1403 1404 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __append_default_init(size_type __n); 1405 1406 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1407 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1408 append(_InputIterator __first, _InputIterator __last) { 1409 const basic_string __temp(__first, __last, __alloc()); 1410 append(__temp.data(), __temp.size()); 1411 return *this; 1412 } 1413 1414 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1415 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1416 append(_ForwardIterator __first, _ForwardIterator __last); 1417 1418#if _LIBCPP_STD_VER >= 23 1419 template <_ContainerCompatibleRange<_CharT> _Range> 1420 _LIBCPP_HIDE_FROM_ABI constexpr basic_string& append_range(_Range&& __range) { 1421 insert_range(end(), std::forward<_Range>(__range)); 1422 return *this; 1423 } 1424#endif 1425 1426#ifndef _LIBCPP_CXX03_LANG 1427 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(initializer_list<value_type> __il) { 1428 return append(__il.begin(), __il.size()); 1429 } 1430#endif // _LIBCPP_CXX03_LANG 1431 1432 _LIBCPP_CONSTEXPR_SINCE_CXX20 void push_back(value_type __c); 1433 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void pop_back(); 1434 1435 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference front() _NOEXCEPT { 1436 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); 1437 return *__get_pointer(); 1438 } 1439 1440 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference front() const _NOEXCEPT { 1441 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); 1442 return *data(); 1443 } 1444 1445 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference back() _NOEXCEPT { 1446 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); 1447 return *(__get_pointer() + size() - 1); 1448 } 1449 1450 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference back() const _NOEXCEPT { 1451 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); 1452 return *(data() + size() - 1); 1453 } 1454 1455 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1456 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1457 assign(const _Tp& __t) { 1458 __self_view __sv = __t; 1459 return assign(__sv.data(), __sv.size()); 1460 } 1461 1462#if _LIBCPP_STD_VER >= 20 1463 _LIBCPP_HIDE_FROM_ABI constexpr void __move_assign(basic_string&& __str, size_type __pos, size_type __len) { 1464 // Pilfer the allocation from __str. 1465 _LIBCPP_ASSERT_INTERNAL(__alloc() == __str.__alloc(), "__move_assign called with wrong allocator"); 1466 size_type __old_sz = __str.size(); 1467 if (!__str.__is_long()) 1468 __str.__annotate_delete(); 1469 __r_.first() = __str.__r_.first(); 1470 __str.__r_.first() = __rep(); 1471 __str.__annotate_new(0); 1472 1473 _Traits::move(data(), data() + __pos, __len); 1474 __set_size(__len); 1475 _Traits::assign(data()[__len], value_type()); 1476 1477 if (!__is_long()) { 1478 __annotate_new(__len); 1479 } else if (__old_sz > __len) { 1480 __annotate_shrink(__old_sz); 1481 } 1482 } 1483#endif 1484 1485 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const basic_string& __str) { 1486 return *this = __str; 1487 } 1488#ifndef _LIBCPP_CXX03_LANG 1489 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1490 assign(basic_string&& __str) noexcept(__noexcept_move_assign_container<_Allocator, __alloc_traits>::value) { 1491 *this = std::move(__str); 1492 return *this; 1493 } 1494#endif 1495 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n = npos); 1496 1497 template <class _Tp, 1498 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1499 !__is_same_uncvref<_Tp, basic_string>::value, 1500 int> = 0> 1501 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1502 assign(const _Tp& __t, size_type __pos, size_type __n = npos); 1503 1504 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s, size_type __n); 1505 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s); 1506 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(size_type __n, value_type __c); 1507 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1508 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1509 assign(_InputIterator __first, _InputIterator __last); 1510 1511 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1512 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1513 assign(_ForwardIterator __first, _ForwardIterator __last); 1514 1515#if _LIBCPP_STD_VER >= 23 1516 template <_ContainerCompatibleRange<_CharT> _Range> 1517 _LIBCPP_HIDE_FROM_ABI constexpr basic_string& assign_range(_Range&& __range) { 1518 if constexpr (__string_is_trivial_iterator<ranges::iterator_t<_Range>>::value && 1519 (ranges::forward_range<_Range> || ranges::sized_range<_Range>)) { 1520 size_type __n = static_cast<size_type>(ranges::distance(__range)); 1521 __assign_trivial(ranges::begin(__range), ranges::end(__range), __n); 1522 1523 } else { 1524 __assign_with_sentinel(ranges::begin(__range), ranges::end(__range)); 1525 } 1526 1527 return *this; 1528 } 1529#endif 1530 1531#ifndef _LIBCPP_CXX03_LANG 1532 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(initializer_list<value_type> __il) { 1533 return assign(__il.begin(), __il.size()); 1534 } 1535#endif // _LIBCPP_CXX03_LANG 1536 1537 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1538 insert(size_type __pos1, const basic_string& __str) { 1539 return insert(__pos1, __str.data(), __str.size()); 1540 } 1541 1542 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1543 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1544 insert(size_type __pos1, const _Tp& __t) { 1545 __self_view __sv = __t; 1546 return insert(__pos1, __sv.data(), __sv.size()); 1547 } 1548 1549 template <class _Tp, 1550 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1551 !__is_same_uncvref<_Tp, basic_string>::value, 1552 int> = 0> 1553 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1554 insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n = npos); 1555 1556 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1557 insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n = npos); 1558 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); 1559 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s); 1560 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, size_type __n, value_type __c); 1561 _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator insert(const_iterator __pos, value_type __c); 1562 1563#if _LIBCPP_STD_VER >= 23 1564 template <_ContainerCompatibleRange<_CharT> _Range> 1565 _LIBCPP_HIDE_FROM_ABI constexpr iterator insert_range(const_iterator __position, _Range&& __range) { 1566 if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { 1567 auto __n = static_cast<size_type>(ranges::distance(__range)); 1568 return __insert_with_size(__position, ranges::begin(__range), ranges::end(__range), __n); 1569 1570 } else { 1571 basic_string __temp(from_range, std::forward<_Range>(__range), __alloc()); 1572 return insert(__position, __temp.data(), __temp.data() + __temp.size()); 1573 } 1574 } 1575#endif 1576 1577 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1578 insert(const_iterator __pos, size_type __n, value_type __c) { 1579 difference_type __p = __pos - begin(); 1580 insert(static_cast<size_type>(__p), __n, __c); 1581 return begin() + __p; 1582 } 1583 1584 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1585 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1586 insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); 1587 1588 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1589 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1590 insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); 1591 1592#ifndef _LIBCPP_CXX03_LANG 1593 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1594 insert(const_iterator __pos, initializer_list<value_type> __il) { 1595 return insert(__pos, __il.begin(), __il.end()); 1596 } 1597#endif // _LIBCPP_CXX03_LANG 1598 1599 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& erase(size_type __pos = 0, size_type __n = npos); 1600 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator erase(const_iterator __pos); 1601 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator erase(const_iterator __first, const_iterator __last); 1602 1603 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1604 replace(size_type __pos1, size_type __n1, const basic_string& __str) { 1605 return replace(__pos1, __n1, __str.data(), __str.size()); 1606 } 1607 1608 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1609 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1610 replace(size_type __pos1, size_type __n1, const _Tp& __t) { 1611 __self_view __sv = __t; 1612 return replace(__pos1, __n1, __sv.data(), __sv.size()); 1613 } 1614 1615 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1616 replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2 = npos); 1617 1618 template <class _Tp, 1619 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1620 !__is_same_uncvref<_Tp, basic_string>::value, 1621 int> = 0> 1622 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1623 replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos); 1624 1625 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1626 replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); 1627 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); 1628 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); 1629 1630 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1631 replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) { 1632 return replace( 1633 static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __str.data(), __str.size()); 1634 } 1635 1636 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1637 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1638 replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { 1639 __self_view __sv = __t; 1640 return replace(__i1 - begin(), __i2 - __i1, __sv); 1641 } 1642 1643 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1644 replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) { 1645 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); 1646 } 1647 1648 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1649 replace(const_iterator __i1, const_iterator __i2, const value_type* __s) { 1650 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); 1651 } 1652 1653 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1654 replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) { 1655 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); 1656 } 1657 1658 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1659 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1660 replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); 1661 1662#if _LIBCPP_STD_VER >= 23 1663 template <_ContainerCompatibleRange<_CharT> _Range> 1664 _LIBCPP_HIDE_FROM_ABI constexpr basic_string& 1665 replace_with_range(const_iterator __i1, const_iterator __i2, _Range&& __range) { 1666 basic_string __temp(from_range, std::forward<_Range>(__range), __alloc()); 1667 return replace(__i1, __i2, __temp); 1668 } 1669#endif 1670 1671#ifndef _LIBCPP_CXX03_LANG 1672 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1673 replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) { 1674 return replace(__i1, __i2, __il.begin(), __il.end()); 1675 } 1676#endif // _LIBCPP_CXX03_LANG 1677 1678 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; 1679 1680#if _LIBCPP_STD_VER <= 20 1681 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string 1682 substr(size_type __pos = 0, size_type __n = npos) const { 1683 return basic_string(*this, __pos, __n); 1684 } 1685#else 1686 _LIBCPP_HIDE_FROM_ABI constexpr basic_string substr(size_type __pos = 0, size_type __n = npos) const& { 1687 return basic_string(*this, __pos, __n); 1688 } 1689 1690 _LIBCPP_HIDE_FROM_ABI constexpr basic_string substr(size_type __pos = 0, size_type __n = npos) && { 1691 return basic_string(std::move(*this), __pos, __n); 1692 } 1693#endif 1694 1695 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void swap(basic_string& __str) 1696#if _LIBCPP_STD_VER >= 14 1697 _NOEXCEPT; 1698#else 1699 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || __is_nothrow_swappable_v<allocator_type>); 1700#endif 1701 1702 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const value_type* c_str() const _NOEXCEPT { return data(); } 1703 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const value_type* data() const _NOEXCEPT { 1704 return std::__to_address(__get_pointer()); 1705 } 1706#if _LIBCPP_STD_VER >= 17 1707 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 value_type* data() _NOEXCEPT { 1708 return std::__to_address(__get_pointer()); 1709 } 1710#endif 1711 1712 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 allocator_type get_allocator() const _NOEXCEPT { 1713 return __alloc(); 1714 } 1715 1716 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1717 find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1718 1719 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1720 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1721 find(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1722 1723 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1724 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1725 find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1726 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1727 1728 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1729 rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1730 1731 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1732 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1733 rfind(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1734 1735 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1736 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1737 rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1738 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1739 1740 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1741 find_first_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1742 1743 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1744 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1745 find_first_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1746 1747 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1748 find_first_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1749 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1750 find_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1751 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1752 find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1753 1754 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1755 find_last_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1756 1757 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1758 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1759 find_last_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1760 1761 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1762 find_last_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1763 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1764 find_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1765 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1766 find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1767 1768 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1769 find_first_not_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1770 1771 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1772 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1773 find_first_not_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1774 1775 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1776 find_first_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1777 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1778 find_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1779 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1780 find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1781 1782 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1783 find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1784 1785 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1786 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1787 find_last_not_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1788 1789 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1790 find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1791 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1792 find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1793 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1794 find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1795 1796 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(const basic_string& __str) const _NOEXCEPT; 1797 1798 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1799 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1800 compare(const _Tp& __t) const _NOEXCEPT; 1801 1802 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1803 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1804 compare(size_type __pos1, size_type __n1, const _Tp& __t) const; 1805 1806 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1807 compare(size_type __pos1, size_type __n1, const basic_string& __str) const; 1808 _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1809 compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2 = npos) const; 1810 1811 template <class _Tp, 1812 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1813 !__is_same_uncvref<_Tp, basic_string>::value, 1814 int> = 0> 1815 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1816 compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos) const; 1817 1818 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(const value_type* __s) const _NOEXCEPT; 1819 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; 1820 _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1821 compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; 1822 1823#if _LIBCPP_STD_VER >= 20 1824 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(__self_view __sv) const noexcept { 1825 return __self_view(data(), size()).starts_with(__sv); 1826 } 1827 1828 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(value_type __c) const noexcept { 1829 return !empty() && _Traits::eq(front(), __c); 1830 } 1831 1832 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(const value_type* __s) const noexcept { 1833 return starts_with(__self_view(__s)); 1834 } 1835 1836 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(__self_view __sv) const noexcept { 1837 return __self_view(data(), size()).ends_with(__sv); 1838 } 1839 1840 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(value_type __c) const noexcept { 1841 return !empty() && _Traits::eq(back(), __c); 1842 } 1843 1844 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(const value_type* __s) const noexcept { 1845 return ends_with(__self_view(__s)); 1846 } 1847#endif 1848 1849#if _LIBCPP_STD_VER >= 23 1850 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(__self_view __sv) const noexcept { 1851 return __self_view(data(), size()).contains(__sv); 1852 } 1853 1854 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(value_type __c) const noexcept { 1855 return __self_view(data(), size()).contains(__c); 1856 } 1857 1858 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(const value_type* __s) const { 1859 return __self_view(data(), size()).contains(__s); 1860 } 1861#endif 1862 1863 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __invariants() const; 1864 1865 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __clear_and_shrink() _NOEXCEPT; 1866 1867private: 1868 template <class _Alloc> 1869 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool friend 1870 operator==(const basic_string<char, char_traits<char>, _Alloc>& __lhs, 1871 const basic_string<char, char_traits<char>, _Alloc>& __rhs) _NOEXCEPT; 1872 1873 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __shrink_or_extend(size_type __target_capacity); 1874 1875 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS bool 1876 __is_long() const _NOEXCEPT { 1877 if (__libcpp_is_constant_evaluated() && __builtin_constant_p(__r_.first().__l.__is_long_)) { 1878 return __r_.first().__l.__is_long_; 1879 } 1880 return __r_.first().__s.__is_long_; 1881 } 1882 1883 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __begin_lifetime(pointer __begin, size_type __n) { 1884#if _LIBCPP_STD_VER >= 20 1885 if (__libcpp_is_constant_evaluated()) { 1886 for (size_type __i = 0; __i != __n; ++__i) 1887 std::construct_at(std::addressof(__begin[__i])); 1888 } 1889#else 1890 (void)__begin; 1891 (void)__n; 1892#endif // _LIBCPP_STD_VER >= 20 1893 } 1894 1895 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) { return __sz < __min_cap; } 1896 1897 template <class _Iterator, class _Sentinel> 1898 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void 1899 __assign_trivial(_Iterator __first, _Sentinel __last, size_type __n); 1900 1901 template <class _Iterator, class _Sentinel> 1902 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __assign_with_sentinel(_Iterator __first, _Sentinel __last); 1903 1904 // Copy [__first, __last) into [__dest, __dest + (__last - __first)). Assumes that the ranges don't overlap. 1905 template <class _ForwardIter, class _Sent> 1906 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 static value_type* 1907 __copy_non_overlapping_range(_ForwardIter __first, _Sent __last, value_type* __dest) { 1908#ifndef _LIBCPP_CXX03_LANG 1909 if constexpr (__libcpp_is_contiguous_iterator<_ForwardIter>::value && 1910 is_same<value_type, __iter_value_type<_ForwardIter>>::value && is_same<_ForwardIter, _Sent>::value) { 1911 traits_type::copy(__dest, std::__to_address(__first), __last - __first); 1912 return __dest + (__last - __first); 1913 } 1914#endif 1915 1916 for (; __first != __last; ++__first) 1917 traits_type::assign(*__dest++, *__first); 1918 return __dest; 1919 } 1920 1921 template <class _ForwardIterator, class _Sentinel> 1922 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 iterator 1923 __insert_from_safe_copy(size_type __n, size_type __ip, _ForwardIterator __first, _Sentinel __last) { 1924 size_type __sz = size(); 1925 size_type __cap = capacity(); 1926 value_type* __p; 1927 if (__cap - __sz >= __n) { 1928 __annotate_increase(__n); 1929 __p = std::__to_address(__get_pointer()); 1930 size_type __n_move = __sz - __ip; 1931 if (__n_move != 0) 1932 traits_type::move(__p + __ip + __n, __p + __ip, __n_move); 1933 } else { 1934 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); 1935 __p = std::__to_address(__get_long_pointer()); 1936 } 1937 __sz += __n; 1938 __set_size(__sz); 1939 traits_type::assign(__p[__sz], value_type()); 1940 __copy_non_overlapping_range(__first, __last, __p + __ip); 1941 1942 return begin() + __ip; 1943 } 1944 1945 template <class _Iterator, class _Sentinel> 1946 _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1947 __insert_with_size(const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n); 1948 1949 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 allocator_type& __alloc() _NOEXCEPT { return __r_.second(); } 1950 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const allocator_type& __alloc() const _NOEXCEPT { return __r_.second(); } 1951 1952 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS void 1953 __set_short_size(size_type __s) _NOEXCEPT { 1954 _LIBCPP_ASSERT_INTERNAL(__s < __min_cap, "__s should never be greater than or equal to the short string capacity"); 1955 __r_.first().__s.__size_ = __s; 1956 __r_.first().__s.__is_long_ = false; 1957 } 1958 1959 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS size_type 1960 __get_short_size() const _NOEXCEPT { 1961 _LIBCPP_ASSERT_INTERNAL(!__r_.first().__s.__is_long_, "String has to be short when trying to get the short size"); 1962 return __r_.first().__s.__size_; 1963 } 1964 1965 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_long_size(size_type __s) _NOEXCEPT { 1966 __r_.first().__l.__size_ = __s; 1967 } 1968 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __get_long_size() const _NOEXCEPT { 1969 return __r_.first().__l.__size_; 1970 } 1971 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_size(size_type __s) _NOEXCEPT { 1972 if (__is_long()) 1973 __set_long_size(__s); 1974 else 1975 __set_short_size(__s); 1976 } 1977 1978 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_long_cap(size_type __s) _NOEXCEPT { 1979 __r_.first().__l.__cap_ = __s / __endian_factor; 1980 __r_.first().__l.__is_long_ = true; 1981 } 1982 1983 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __get_long_cap() const _NOEXCEPT { 1984 return __r_.first().__l.__cap_ * __endian_factor; 1985 } 1986 1987 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_long_pointer(pointer __p) _NOEXCEPT { 1988 __r_.first().__l.__data_ = __p; 1989 } 1990 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pointer __get_long_pointer() _NOEXCEPT { 1991 return _LIBCPP_ASAN_VOLATILE_WRAPPER(__r_.first().__l.__data_); 1992 } 1993 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_pointer __get_long_pointer() const _NOEXCEPT { 1994 return _LIBCPP_ASAN_VOLATILE_WRAPPER(__r_.first().__l.__data_); 1995 } 1996 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS pointer 1997 __get_short_pointer() _NOEXCEPT { 1998 return _LIBCPP_ASAN_VOLATILE_WRAPPER(pointer_traits<pointer>::pointer_to(__r_.first().__s.__data_[0])); 1999 } 2000 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS const_pointer 2001 __get_short_pointer() const _NOEXCEPT { 2002 return _LIBCPP_ASAN_VOLATILE_WRAPPER(pointer_traits<const_pointer>::pointer_to(__r_.first().__s.__data_[0])); 2003 } 2004 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pointer __get_pointer() _NOEXCEPT { 2005 return __is_long() ? __get_long_pointer() : __get_short_pointer(); 2006 } 2007 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_pointer __get_pointer() const _NOEXCEPT { 2008 return __is_long() ? __get_long_pointer() : __get_short_pointer(); 2009 } 2010 2011 // The following functions are no-ops outside of AddressSanitizer mode. 2012 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2013 __annotate_contiguous_container(const void* __old_mid, const void* __new_mid) const { 2014 (void)__old_mid; 2015 (void)__new_mid; 2016#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 2017 #if defined(__APPLE__) 2018 // TODO: remove after addressing issue #96099 (https://github.com/llvm/llvm-project/issues/96099) 2019 if(!__is_long()) 2020 return; 2021 #endif 2022 std::__annotate_contiguous_container<_Allocator>(data(), data() + capacity() + 1, __old_mid, __new_mid); 2023#endif 2024 } 2025 2026 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_new(size_type __current_size) const _NOEXCEPT { 2027 (void)__current_size; 2028#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 2029 if (!__libcpp_is_constant_evaluated()) 2030 __annotate_contiguous_container(data() + capacity() + 1, data() + __current_size + 1); 2031#endif 2032 } 2033 2034 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_delete() const _NOEXCEPT { 2035#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 2036 if (!__libcpp_is_constant_evaluated()) 2037 __annotate_contiguous_container(data() + size() + 1, data() + capacity() + 1); 2038#endif 2039 } 2040 2041 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_increase(size_type __n) const _NOEXCEPT { 2042 (void)__n; 2043#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 2044 if (!__libcpp_is_constant_evaluated()) 2045 __annotate_contiguous_container(data() + size() + 1, data() + size() + 1 + __n); 2046#endif 2047 } 2048 2049 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_shrink(size_type __old_size) const _NOEXCEPT { 2050 (void)__old_size; 2051#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 2052 if (!__libcpp_is_constant_evaluated()) 2053 __annotate_contiguous_container(data() + __old_size + 1, data() + size() + 1); 2054#endif 2055 } 2056 2057 template <size_type __a> 2058 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __align_it(size_type __s) _NOEXCEPT { 2059 return (__s + (__a - 1)) & ~(__a - 1); 2060 } 2061 enum { __alignment = 8 }; 2062 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __recommend(size_type __s) _NOEXCEPT { 2063 if (__s < __min_cap) { 2064 return static_cast<size_type>(__min_cap) - 1; 2065 } 2066 const size_type __boundary = sizeof(value_type) < __alignment ? __alignment / sizeof(value_type) : __endian_factor; 2067 size_type __guess = __align_it<__boundary>(__s + 1) - 1; 2068 if (__guess == __min_cap) 2069 __guess += __endian_factor; 2070 return __guess; 2071 } 2072 2073 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(const value_type* __s, size_type __sz, size_type __reserve); 2074 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(const value_type* __s, size_type __sz); 2075 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(size_type __n, value_type __c); 2076 2077 // Slow path for the (inlined) copy constructor for 'long' strings. 2078 // Always externally instantiated and not inlined. 2079 // Requires that __s is zero terminated. 2080 // The main reason for this function to exist is because for unstable, we 2081 // want to allow inlining of the copy constructor. However, we don't want 2082 // to call the __init() functions as those are marked as inline which may 2083 // result in over-aggressive inlining by the compiler, where our aim is 2084 // to only inline the fast path code directly in the ctor. 2085 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void __init_copy_ctor_external(const value_type* __s, size_type __sz); 2086 2087 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 2088 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_InputIterator __first, _InputIterator __last); 2089 2090 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 2091 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_ForwardIterator __first, _ForwardIterator __last); 2092 2093 template <class _InputIterator, class _Sentinel> 2094 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2095 __init_with_sentinel(_InputIterator __first, _Sentinel __last); 2096 template <class _InputIterator, class _Sentinel> 2097 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2098 __init_with_size(_InputIterator __first, _Sentinel __last, size_type __sz); 2099 2100 _LIBCPP_CONSTEXPR_SINCE_CXX20 2101#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 2102 _LIBCPP_HIDE_FROM_ABI 2103#endif 2104 _LIBCPP_DEPRECATED_("use __grow_by_without_replace") void __grow_by( 2105 size_type __old_cap, 2106 size_type __delta_cap, 2107 size_type __old_sz, 2108 size_type __n_copy, 2109 size_type __n_del, 2110 size_type __n_add = 0); 2111 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __grow_by_without_replace( 2112 size_type __old_cap, 2113 size_type __delta_cap, 2114 size_type __old_sz, 2115 size_type __n_copy, 2116 size_type __n_del, 2117 size_type __n_add = 0); 2118 _LIBCPP_CONSTEXPR_SINCE_CXX20 void __grow_by_and_replace( 2119 size_type __old_cap, 2120 size_type __delta_cap, 2121 size_type __old_sz, 2122 size_type __n_copy, 2123 size_type __n_del, 2124 size_type __n_add, 2125 const value_type* __p_new_stuff); 2126 2127 // __assign_no_alias is invoked for assignment operations where we 2128 // have proof that the input does not alias the current instance. 2129 // For example, operator=(basic_string) performs a 'self' check. 2130 template <bool __is_short> 2131 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_no_alias(const value_type* __s, size_type __n); 2132 2133 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __erase_to_end(size_type __pos) { 2134 __null_terminate_at(std::__to_address(__get_pointer()), __pos); 2135 } 2136 2137 // __erase_external_with_move is invoked for erase() invocations where 2138 // `n ~= npos`, likely requiring memory moves on the string data. 2139 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void __erase_external_with_move(size_type __pos, size_type __n); 2140 2141 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __copy_assign_alloc(const basic_string& __str) { 2142 __copy_assign_alloc( 2143 __str, integral_constant<bool, __alloc_traits::propagate_on_container_copy_assignment::value>()); 2144 } 2145 2146 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __copy_assign_alloc(const basic_string& __str, true_type) { 2147 if (__alloc() == __str.__alloc()) 2148 __alloc() = __str.__alloc(); 2149 else { 2150 if (!__str.__is_long()) { 2151 __clear_and_shrink(); 2152 __alloc() = __str.__alloc(); 2153 } else { 2154 __annotate_delete(); 2155 allocator_type __a = __str.__alloc(); 2156 auto __allocation = std::__allocate_at_least(__a, __str.__get_long_cap()); 2157 __begin_lifetime(__allocation.ptr, __allocation.count); 2158 if (__is_long()) 2159 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2160 __alloc() = std::move(__a); 2161 __set_long_pointer(__allocation.ptr); 2162 __set_long_cap(__allocation.count); 2163 __set_long_size(__str.size()); 2164 __annotate_new(__get_long_size()); 2165 } 2166 } 2167 } 2168 2169 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2170 __copy_assign_alloc(const basic_string&, false_type) _NOEXCEPT {} 2171 2172#ifndef _LIBCPP_CXX03_LANG 2173 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2174 __move_assign(basic_string& __str, false_type) noexcept(__alloc_traits::is_always_equal::value); 2175 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS void 2176 __move_assign(basic_string& __str, true_type) 2177# if _LIBCPP_STD_VER >= 17 2178 noexcept; 2179# else 2180 noexcept(is_nothrow_move_assignable<allocator_type>::value); 2181# endif 2182#endif 2183 2184 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __move_assign_alloc(basic_string& __str) 2185 _NOEXCEPT_(!__alloc_traits::propagate_on_container_move_assignment::value || 2186 is_nothrow_move_assignable<allocator_type>::value) { 2187 __move_assign_alloc( 2188 __str, integral_constant<bool, __alloc_traits::propagate_on_container_move_assignment::value>()); 2189 } 2190 2191 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __move_assign_alloc(basic_string& __c, true_type) 2192 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) { 2193 __alloc() = std::move(__c.__alloc()); 2194 } 2195 2196 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __move_assign_alloc(basic_string&, false_type) _NOEXCEPT {} 2197 2198 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_external(const value_type* __s); 2199 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_external(const value_type* __s, size_type __n); 2200 2201 // Assigns the value in __s, guaranteed to be __n < __min_cap in length. 2202 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_short(const value_type* __s, size_type __n) { 2203 size_type __old_size = size(); 2204 if (__n > __old_size) 2205 __annotate_increase(__n - __old_size); 2206 pointer __p = 2207 __is_long() ? (__set_long_size(__n), __get_long_pointer()) : (__set_short_size(__n), __get_short_pointer()); 2208 traits_type::move(std::__to_address(__p), __s, __n); 2209 traits_type::assign(__p[__n], value_type()); 2210 if (__old_size > __n) 2211 __annotate_shrink(__old_size); 2212 return *this; 2213 } 2214 2215 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 2216 __null_terminate_at(value_type* __p, size_type __newsz) { 2217 size_type __old_size = size(); 2218 if (__newsz > __old_size) 2219 __annotate_increase(__newsz - __old_size); 2220 __set_size(__newsz); 2221 traits_type::assign(__p[__newsz], value_type()); 2222 if (__old_size > __newsz) 2223 __annotate_shrink(__old_size); 2224 return *this; 2225 } 2226 2227 template <class _Tp> 2228 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __addr_in_range(const _Tp& __v) const { 2229 return std::__is_pointer_in_range(data(), data() + size() + 1, std::addressof(__v)); 2230 } 2231 2232 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI void __throw_length_error() const { 2233 std::__throw_length_error("basic_string"); 2234 } 2235 2236 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI void __throw_out_of_range() const { 2237 std::__throw_out_of_range("basic_string"); 2238 } 2239 2240 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const basic_string&, const basic_string&); 2241 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const value_type*, const basic_string&); 2242 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(value_type, const basic_string&); 2243 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const basic_string&, const value_type*); 2244 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const basic_string&, value_type); 2245#if _LIBCPP_STD_VER >= 26 2246 friend constexpr basic_string operator+ <>(const basic_string&, type_identity_t<__self_view>); 2247 friend constexpr basic_string operator+ <>(type_identity_t<__self_view>, const basic_string&); 2248#endif 2249}; 2250 2251// These declarations must appear before any functions are implicitly used 2252// so that they have the correct visibility specifier. 2253#define _LIBCPP_DECLARE(...) extern template __VA_ARGS__; 2254#ifdef _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 2255_LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 2256# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 2257_LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 2258# endif 2259#else 2260_LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 2261# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 2262_LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 2263# endif 2264#endif 2265#undef _LIBCPP_DECLARE 2266 2267#if _LIBCPP_STD_VER >= 17 2268template <class _InputIterator, 2269 class _CharT = __iter_value_type<_InputIterator>, 2270 class _Allocator = allocator<_CharT>, 2271 class = enable_if_t<__has_input_iterator_category<_InputIterator>::value>, 2272 class = enable_if_t<__is_allocator<_Allocator>::value> > 2273basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator()) 2274 -> basic_string<_CharT, char_traits<_CharT>, _Allocator>; 2275 2276template <class _CharT, 2277 class _Traits, 2278 class _Allocator = allocator<_CharT>, 2279 class = enable_if_t<__is_allocator<_Allocator>::value> > 2280explicit basic_string(basic_string_view<_CharT, _Traits>, 2281 const _Allocator& = _Allocator()) -> basic_string<_CharT, _Traits, _Allocator>; 2282 2283template <class _CharT, 2284 class _Traits, 2285 class _Allocator = allocator<_CharT>, 2286 class = enable_if_t<__is_allocator<_Allocator>::value>, 2287 class _Sz = typename allocator_traits<_Allocator>::size_type > 2288basic_string(basic_string_view<_CharT, _Traits>, _Sz, _Sz, const _Allocator& = _Allocator()) 2289 -> basic_string<_CharT, _Traits, _Allocator>; 2290#endif 2291 2292#if _LIBCPP_STD_VER >= 23 2293template <ranges::input_range _Range, 2294 class _Allocator = allocator<ranges::range_value_t<_Range>>, 2295 class = enable_if_t<__is_allocator<_Allocator>::value> > 2296basic_string(from_range_t, _Range&&, _Allocator = _Allocator()) 2297 -> basic_string<ranges::range_value_t<_Range>, char_traits<ranges::range_value_t<_Range>>, _Allocator>; 2298#endif 2299 2300template <class _CharT, class _Traits, class _Allocator> 2301_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2302basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz, size_type __reserve) { 2303 if (__libcpp_is_constant_evaluated()) 2304 __r_.first() = __rep(); 2305 if (__reserve > max_size()) 2306 __throw_length_error(); 2307 pointer __p; 2308 if (__fits_in_sso(__reserve)) { 2309 __set_short_size(__sz); 2310 __p = __get_short_pointer(); 2311 } else { 2312 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__reserve) + 1); 2313 __p = __allocation.ptr; 2314 __begin_lifetime(__p, __allocation.count); 2315 __set_long_pointer(__p); 2316 __set_long_cap(__allocation.count); 2317 __set_long_size(__sz); 2318 } 2319 traits_type::copy(std::__to_address(__p), __s, __sz); 2320 traits_type::assign(__p[__sz], value_type()); 2321 __annotate_new(__sz); 2322} 2323 2324template <class _CharT, class _Traits, class _Allocator> 2325_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2326basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz) { 2327 if (__libcpp_is_constant_evaluated()) 2328 __r_.first() = __rep(); 2329 if (__sz > max_size()) 2330 __throw_length_error(); 2331 pointer __p; 2332 if (__fits_in_sso(__sz)) { 2333 __set_short_size(__sz); 2334 __p = __get_short_pointer(); 2335 } else { 2336 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2337 __p = __allocation.ptr; 2338 __begin_lifetime(__p, __allocation.count); 2339 __set_long_pointer(__p); 2340 __set_long_cap(__allocation.count); 2341 __set_long_size(__sz); 2342 } 2343 traits_type::copy(std::__to_address(__p), __s, __sz); 2344 traits_type::assign(__p[__sz], value_type()); 2345 __annotate_new(__sz); 2346} 2347 2348template <class _CharT, class _Traits, class _Allocator> 2349_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void 2350basic_string<_CharT, _Traits, _Allocator>::__init_copy_ctor_external(const value_type* __s, size_type __sz) { 2351 if (__libcpp_is_constant_evaluated()) 2352 __r_.first() = __rep(); 2353 2354 pointer __p; 2355 if (__fits_in_sso(__sz)) { 2356 __p = __get_short_pointer(); 2357 __set_short_size(__sz); 2358 } else { 2359 if (__sz > max_size()) 2360 __throw_length_error(); 2361 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2362 __p = __allocation.ptr; 2363 __begin_lifetime(__p, __allocation.count); 2364 __set_long_pointer(__p); 2365 __set_long_cap(__allocation.count); 2366 __set_long_size(__sz); 2367 } 2368 traits_type::copy(std::__to_address(__p), __s, __sz + 1); 2369 __annotate_new(__sz); 2370} 2371 2372template <class _CharT, class _Traits, class _Allocator> 2373_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__init(size_type __n, value_type __c) { 2374 if (__libcpp_is_constant_evaluated()) 2375 __r_.first() = __rep(); 2376 2377 if (__n > max_size()) 2378 __throw_length_error(); 2379 pointer __p; 2380 if (__fits_in_sso(__n)) { 2381 __set_short_size(__n); 2382 __p = __get_short_pointer(); 2383 } else { 2384 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__n) + 1); 2385 __p = __allocation.ptr; 2386 __begin_lifetime(__p, __allocation.count); 2387 __set_long_pointer(__p); 2388 __set_long_cap(__allocation.count); 2389 __set_long_size(__n); 2390 } 2391 traits_type::assign(std::__to_address(__p), __n, __c); 2392 traits_type::assign(__p[__n], value_type()); 2393 __annotate_new(__n); 2394} 2395 2396template <class _CharT, class _Traits, class _Allocator> 2397template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 2398_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2399basic_string<_CharT, _Traits, _Allocator>::__init(_InputIterator __first, _InputIterator __last) { 2400 __init_with_sentinel(std::move(__first), std::move(__last)); 2401} 2402 2403template <class _CharT, class _Traits, class _Allocator> 2404template <class _InputIterator, class _Sentinel> 2405_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2406basic_string<_CharT, _Traits, _Allocator>::__init_with_sentinel(_InputIterator __first, _Sentinel __last) { 2407 __r_.first() = __rep(); 2408 __annotate_new(0); 2409 2410#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2411 try { 2412#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2413 for (; __first != __last; ++__first) 2414 push_back(*__first); 2415#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2416 } catch (...) { 2417 __annotate_delete(); 2418 if (__is_long()) 2419 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2420 throw; 2421 } 2422#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2423} 2424 2425template <class _CharT, class _Traits, class _Allocator> 2426template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2427_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2428basic_string<_CharT, _Traits, _Allocator>::__init(_ForwardIterator __first, _ForwardIterator __last) { 2429 size_type __sz = static_cast<size_type>(std::distance(__first, __last)); 2430 __init_with_size(__first, __last, __sz); 2431} 2432 2433template <class _CharT, class _Traits, class _Allocator> 2434template <class _InputIterator, class _Sentinel> 2435_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2436basic_string<_CharT, _Traits, _Allocator>::__init_with_size(_InputIterator __first, _Sentinel __last, size_type __sz) { 2437 if (__libcpp_is_constant_evaluated()) 2438 __r_.first() = __rep(); 2439 2440 if (__sz > max_size()) 2441 __throw_length_error(); 2442 2443 pointer __p; 2444 if (__fits_in_sso(__sz)) { 2445 __set_short_size(__sz); 2446 __p = __get_short_pointer(); 2447 2448 } else { 2449 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2450 __p = __allocation.ptr; 2451 __begin_lifetime(__p, __allocation.count); 2452 __set_long_pointer(__p); 2453 __set_long_cap(__allocation.count); 2454 __set_long_size(__sz); 2455 } 2456 2457#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2458 try { 2459#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2460 auto __end = __copy_non_overlapping_range(__first, __last, std::__to_address(__p)); 2461 traits_type::assign(*__end, value_type()); 2462#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2463 } catch (...) { 2464 if (__is_long()) 2465 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2466 throw; 2467 } 2468#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2469 __annotate_new(__sz); 2470} 2471 2472template <class _CharT, class _Traits, class _Allocator> 2473_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace( 2474 size_type __old_cap, 2475 size_type __delta_cap, 2476 size_type __old_sz, 2477 size_type __n_copy, 2478 size_type __n_del, 2479 size_type __n_add, 2480 const value_type* __p_new_stuff) { 2481 size_type __ms = max_size(); 2482 if (__delta_cap > __ms - __old_cap - 1) 2483 __throw_length_error(); 2484 pointer __old_p = __get_pointer(); 2485 size_type __cap = 2486 __old_cap < __ms / 2 - __alignment ? __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : __ms - 1; 2487 __annotate_delete(); 2488 auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); 2489 pointer __p = __allocation.ptr; 2490 __begin_lifetime(__p, __allocation.count); 2491 if (__n_copy != 0) 2492 traits_type::copy(std::__to_address(__p), std::__to_address(__old_p), __n_copy); 2493 if (__n_add != 0) 2494 traits_type::copy(std::__to_address(__p) + __n_copy, __p_new_stuff, __n_add); 2495 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2496 if (__sec_cp_sz != 0) 2497 traits_type::copy( 2498 std::__to_address(__p) + __n_copy + __n_add, std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2499 if (__old_cap + 1 != __min_cap) 2500 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap + 1); 2501 __set_long_pointer(__p); 2502 __set_long_cap(__allocation.count); 2503 __old_sz = __n_copy + __n_add + __sec_cp_sz; 2504 __set_long_size(__old_sz); 2505 traits_type::assign(__p[__old_sz], value_type()); 2506 __annotate_new(__old_sz); 2507} 2508 2509// __grow_by is deprecated because it does not set the size. It may not update the size when the size is changed, and it 2510// may also not set the size at all when the string was short initially. This leads to unpredictable size value. It is 2511// not removed or changed to avoid breaking the ABI. 2512template <class _CharT, class _Traits, class _Allocator> 2513void _LIBCPP_CONSTEXPR_SINCE_CXX20 2514#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 2515_LIBCPP_HIDE_FROM_ABI 2516#endif 2517_LIBCPP_DEPRECATED_("use __grow_by_without_replace") basic_string<_CharT, _Traits, _Allocator>::__grow_by( 2518 size_type __old_cap, 2519 size_type __delta_cap, 2520 size_type __old_sz, 2521 size_type __n_copy, 2522 size_type __n_del, 2523 size_type __n_add) { 2524 size_type __ms = max_size(); 2525 if (__delta_cap > __ms - __old_cap) 2526 __throw_length_error(); 2527 pointer __old_p = __get_pointer(); 2528 size_type __cap = 2529 __old_cap < __ms / 2 - __alignment ? __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : __ms - 1; 2530 __annotate_delete(); 2531 auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); 2532 pointer __p = __allocation.ptr; 2533 __begin_lifetime(__p, __allocation.count); 2534 if (__n_copy != 0) 2535 traits_type::copy(std::__to_address(__p), std::__to_address(__old_p), __n_copy); 2536 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2537 if (__sec_cp_sz != 0) 2538 traits_type::copy( 2539 std::__to_address(__p) + __n_copy + __n_add, std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2540 if (__old_cap + 1 != __min_cap) 2541 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap + 1); 2542 __set_long_pointer(__p); 2543 __set_long_cap(__allocation.count); 2544} 2545 2546template <class _CharT, class _Traits, class _Allocator> 2547void _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 2548basic_string<_CharT, _Traits, _Allocator>::__grow_by_without_replace( 2549 size_type __old_cap, 2550 size_type __delta_cap, 2551 size_type __old_sz, 2552 size_type __n_copy, 2553 size_type __n_del, 2554 size_type __n_add) { 2555 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 2556 __grow_by(__old_cap, __delta_cap, __old_sz, __n_copy, __n_del, __n_add); 2557 _LIBCPP_SUPPRESS_DEPRECATED_POP 2558 __set_long_size(__old_sz - __n_del + __n_add); 2559 __annotate_new(__old_sz - __n_del + __n_add); 2560} 2561 2562// assign 2563 2564template <class _CharT, class _Traits, class _Allocator> 2565template <bool __is_short> 2566_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string<_CharT, _Traits, _Allocator>& 2567basic_string<_CharT, _Traits, _Allocator>::__assign_no_alias(const value_type* __s, size_type __n) { 2568 size_type __cap = __is_short ? static_cast<size_type>(__min_cap) : __get_long_cap(); 2569 if (__n < __cap) { 2570 size_type __old_size = __is_short ? __get_short_size() : __get_long_size(); 2571 if (__n > __old_size) 2572 __annotate_increase(__n - __old_size); 2573 pointer __p = __is_short ? __get_short_pointer() : __get_long_pointer(); 2574 __is_short ? __set_short_size(__n) : __set_long_size(__n); 2575 traits_type::copy(std::__to_address(__p), __s, __n); 2576 traits_type::assign(__p[__n], value_type()); 2577 if (__old_size > __n) 2578 __annotate_shrink(__old_size); 2579 } else { 2580 size_type __sz = __is_short ? __get_short_size() : __get_long_size(); 2581 __grow_by_and_replace(__cap - 1, __n - __cap + 1, __sz, 0, __sz, __n, __s); 2582 } 2583 return *this; 2584} 2585 2586template <class _CharT, class _Traits, class _Allocator> 2587_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string<_CharT, _Traits, _Allocator>& 2588basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s, size_type __n) { 2589 size_type __cap = capacity(); 2590 if (__cap >= __n) { 2591 size_type __old_size = size(); 2592 if (__n > __old_size) 2593 __annotate_increase(__n - __old_size); 2594 value_type* __p = std::__to_address(__get_pointer()); 2595 traits_type::move(__p, __s, __n); 2596 return __null_terminate_at(__p, __n); 2597 } else { 2598 size_type __sz = size(); 2599 __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); 2600 return *this; 2601 } 2602} 2603 2604template <class _CharT, class _Traits, class _Allocator> 2605_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2606basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s, size_type __n) { 2607 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::assign received nullptr"); 2608 return (__builtin_constant_p(__n) && __fits_in_sso(__n)) ? __assign_short(__s, __n) : __assign_external(__s, __n); 2609} 2610 2611template <class _CharT, class _Traits, class _Allocator> 2612_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2613basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) { 2614 size_type __cap = capacity(); 2615 size_type __old_size = size(); 2616 if (__cap < __n) { 2617 size_type __sz = size(); 2618 __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); 2619 __annotate_increase(__n); 2620 } else if (__n > __old_size) 2621 __annotate_increase(__n - __old_size); 2622 value_type* __p = std::__to_address(__get_pointer()); 2623 traits_type::assign(__p, __n, __c); 2624 return __null_terminate_at(__p, __n); 2625} 2626 2627template <class _CharT, class _Traits, class _Allocator> 2628_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2629basic_string<_CharT, _Traits, _Allocator>::operator=(value_type __c) { 2630 pointer __p; 2631 size_type __old_size = size(); 2632 if (__old_size == 0) 2633 __annotate_increase(1); 2634 if (__is_long()) { 2635 __p = __get_long_pointer(); 2636 __set_long_size(1); 2637 } else { 2638 __p = __get_short_pointer(); 2639 __set_short_size(1); 2640 } 2641 traits_type::assign(*__p, __c); 2642 traits_type::assign(*++__p, value_type()); 2643 if (__old_size > 1) 2644 __annotate_shrink(__old_size); 2645 return *this; 2646} 2647 2648template <class _CharT, class _Traits, class _Allocator> 2649_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string<_CharT, _Traits, _Allocator>& 2650basic_string<_CharT, _Traits, _Allocator>::operator=(const basic_string& __str) { 2651 if (this != std::addressof(__str)) { 2652 __copy_assign_alloc(__str); 2653 if (!__is_long()) { 2654 if (!__str.__is_long()) { 2655 size_type __old_size = __get_short_size(); 2656 if (__get_short_size() < __str.__get_short_size()) 2657 __annotate_increase(__str.__get_short_size() - __get_short_size()); 2658 __r_.first() = __str.__r_.first(); 2659 if (__old_size > __get_short_size()) 2660 __annotate_shrink(__old_size); 2661 } else { 2662 return __assign_no_alias<true>(__str.data(), __str.size()); 2663 } 2664 } else { 2665 return __assign_no_alias<false>(__str.data(), __str.size()); 2666 } 2667 } 2668 return *this; 2669} 2670 2671#ifndef _LIBCPP_CXX03_LANG 2672 2673template <class _CharT, class _Traits, class _Allocator> 2674inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__move_assign( 2675 basic_string& __str, false_type) noexcept(__alloc_traits::is_always_equal::value) { 2676 if (__alloc() != __str.__alloc()) 2677 assign(__str); 2678 else 2679 __move_assign(__str, true_type()); 2680} 2681 2682template <class _CharT, class _Traits, class _Allocator> 2683inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS void 2684basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type) 2685# if _LIBCPP_STD_VER >= 17 2686 noexcept 2687# else 2688 noexcept(is_nothrow_move_assignable<allocator_type>::value) 2689# endif 2690{ 2691 __annotate_delete(); 2692 if (__is_long()) { 2693 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2694# if _LIBCPP_STD_VER <= 14 2695 if (!is_nothrow_move_assignable<allocator_type>::value) { 2696 __set_short_size(0); 2697 traits_type::assign(__get_short_pointer()[0], value_type()); 2698 __annotate_new(0); 2699 } 2700# endif 2701 } 2702 size_type __str_old_size = __str.size(); 2703 bool __str_was_short = !__str.__is_long(); 2704 2705 __move_assign_alloc(__str); 2706 __r_.first() = __str.__r_.first(); 2707 __str.__set_short_size(0); 2708 traits_type::assign(__str.__get_short_pointer()[0], value_type()); 2709 2710 if (__str_was_short && this != &__str) 2711 __str.__annotate_shrink(__str_old_size); 2712 else 2713 // ASan annotations: was long, so object memory is unpoisoned as new. 2714 // Or is same as *this, and __annotate_delete() was called. 2715 __str.__annotate_new(0); 2716 2717 // ASan annotations: Guard against `std::string s; s = std::move(s);` 2718 // You can find more here: https://en.cppreference.com/w/cpp/utility/move 2719 // Quote: "Unless otherwise specified, all standard library objects that have been moved 2720 // from are placed in a "valid but unspecified state", meaning the object's class 2721 // invariants hold (so functions without preconditions, such as the assignment operator, 2722 // can be safely used on the object after it was moved from):" 2723 // Quote: "v = std::move(v); // the value of v is unspecified" 2724 if (!__is_long() && &__str != this) 2725 // If it is long string, delete was never called on original __str's buffer. 2726 __annotate_new(__get_short_size()); 2727} 2728 2729#endif 2730 2731template <class _CharT, class _Traits, class _Allocator> 2732template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 2733_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2734basic_string<_CharT, _Traits, _Allocator>::assign(_InputIterator __first, _InputIterator __last) { 2735 __assign_with_sentinel(__first, __last); 2736 return *this; 2737} 2738 2739template <class _CharT, class _Traits, class _Allocator> 2740template <class _InputIterator, class _Sentinel> 2741_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2742basic_string<_CharT, _Traits, _Allocator>::__assign_with_sentinel(_InputIterator __first, _Sentinel __last) { 2743 const basic_string __temp(__init_with_sentinel_tag(), std::move(__first), std::move(__last), __alloc()); 2744 assign(__temp.data(), __temp.size()); 2745} 2746 2747template <class _CharT, class _Traits, class _Allocator> 2748template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2749_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2750basic_string<_CharT, _Traits, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last) { 2751 if (__string_is_trivial_iterator<_ForwardIterator>::value) { 2752 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2753 __assign_trivial(__first, __last, __n); 2754 } else { 2755 __assign_with_sentinel(__first, __last); 2756 } 2757 2758 return *this; 2759} 2760 2761template <class _CharT, class _Traits, class _Allocator> 2762template <class _Iterator, class _Sentinel> 2763_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void 2764basic_string<_CharT, _Traits, _Allocator>::__assign_trivial(_Iterator __first, _Sentinel __last, size_type __n) { 2765 _LIBCPP_ASSERT_INTERNAL( 2766 __string_is_trivial_iterator<_Iterator>::value, "The iterator type given to `__assign_trivial` must be trivial"); 2767 2768 size_type __old_size = size(); 2769 size_type __cap = capacity(); 2770 if (__cap < __n) { 2771 // Unlike `append` functions, if the input range points into the string itself, there is no case that the input 2772 // range could get invalidated by reallocation: 2773 // 1. If the input range is a subset of the string itself, its size cannot exceed the capacity of the string, 2774 // thus no reallocation would happen. 2775 // 2. In the exotic case where the input range is the byte representation of the string itself, the string 2776 // object itself stays valid even if reallocation happens. 2777 size_type __sz = size(); 2778 __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); 2779 __annotate_increase(__n); 2780 } else if (__n > __old_size) 2781 __annotate_increase(__n - __old_size); 2782 pointer __p = __get_pointer(); 2783 for (; __first != __last; ++__p, (void)++__first) 2784 traits_type::assign(*__p, *__first); 2785 traits_type::assign(*__p, value_type()); 2786 __set_size(__n); 2787 if (__n < __old_size) 2788 __annotate_shrink(__old_size); 2789} 2790 2791template <class _CharT, class _Traits, class _Allocator> 2792_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2793basic_string<_CharT, _Traits, _Allocator>::assign(const basic_string& __str, size_type __pos, size_type __n) { 2794 size_type __sz = __str.size(); 2795 if (__pos > __sz) 2796 __throw_out_of_range(); 2797 return assign(__str.data() + __pos, std::min(__n, __sz - __pos)); 2798} 2799 2800template <class _CharT, class _Traits, class _Allocator> 2801template <class _Tp, 2802 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2803 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2804 int> > 2805_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2806basic_string<_CharT, _Traits, _Allocator>::assign(const _Tp& __t, size_type __pos, size_type __n) { 2807 __self_view __sv = __t; 2808 size_type __sz = __sv.size(); 2809 if (__pos > __sz) 2810 __throw_out_of_range(); 2811 return assign(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2812} 2813 2814template <class _CharT, class _Traits, class _Allocator> 2815_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string<_CharT, _Traits, _Allocator>& 2816basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s) { 2817 return __assign_external(__s, traits_type::length(__s)); 2818} 2819 2820template <class _CharT, class _Traits, class _Allocator> 2821_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2822basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s) { 2823 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::assign received nullptr"); 2824 return __builtin_constant_p(*__s) 2825 ? (__fits_in_sso(traits_type::length(__s)) ? __assign_short(__s, traits_type::length(__s)) 2826 : __assign_external(__s, traits_type::length(__s))) 2827 : __assign_external(__s); 2828} 2829// append 2830 2831template <class _CharT, class _Traits, class _Allocator> 2832_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2833basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s, size_type __n) { 2834 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::append received nullptr"); 2835 size_type __cap = capacity(); 2836 size_type __sz = size(); 2837 if (__cap - __sz >= __n) { 2838 if (__n) { 2839 __annotate_increase(__n); 2840 value_type* __p = std::__to_address(__get_pointer()); 2841 traits_type::copy(__p + __sz, __s, __n); 2842 __sz += __n; 2843 __set_size(__sz); 2844 traits_type::assign(__p[__sz], value_type()); 2845 } 2846 } else 2847 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __sz, 0, __n, __s); 2848 return *this; 2849} 2850 2851template <class _CharT, class _Traits, class _Allocator> 2852_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2853basic_string<_CharT, _Traits, _Allocator>::append(size_type __n, value_type __c) { 2854 if (__n) { 2855 size_type __cap = capacity(); 2856 size_type __sz = size(); 2857 if (__cap - __sz < __n) 2858 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2859 __annotate_increase(__n); 2860 pointer __p = __get_pointer(); 2861 traits_type::assign(std::__to_address(__p) + __sz, __n, __c); 2862 __sz += __n; 2863 __set_size(__sz); 2864 traits_type::assign(__p[__sz], value_type()); 2865 } 2866 return *this; 2867} 2868 2869template <class _CharT, class _Traits, class _Allocator> 2870_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 2871basic_string<_CharT, _Traits, _Allocator>::__append_default_init(size_type __n) { 2872 if (__n) { 2873 size_type __cap = capacity(); 2874 size_type __sz = size(); 2875 if (__cap - __sz < __n) 2876 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2877 __annotate_increase(__n); 2878 pointer __p = __get_pointer(); 2879 __sz += __n; 2880 __set_size(__sz); 2881 traits_type::assign(__p[__sz], value_type()); 2882 } 2883} 2884 2885template <class _CharT, class _Traits, class _Allocator> 2886_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::push_back(value_type __c) { 2887 bool __is_short = !__is_long(); 2888 size_type __cap; 2889 size_type __sz; 2890 if (__is_short) { 2891 __cap = __min_cap - 1; 2892 __sz = __get_short_size(); 2893 } else { 2894 __cap = __get_long_cap() - 1; 2895 __sz = __get_long_size(); 2896 } 2897 if (__sz == __cap) { 2898 __grow_by_without_replace(__cap, 1, __sz, __sz, 0); 2899 __annotate_increase(1); 2900 __is_short = false; // the string is always long after __grow_by 2901 } else 2902 __annotate_increase(1); 2903 pointer __p = __get_pointer(); 2904 if (__is_short) { 2905 __p = __get_short_pointer() + __sz; 2906 __set_short_size(__sz + 1); 2907 } else { 2908 __p = __get_long_pointer() + __sz; 2909 __set_long_size(__sz + 1); 2910 } 2911 traits_type::assign(*__p, __c); 2912 traits_type::assign(*++__p, value_type()); 2913} 2914 2915template <class _CharT, class _Traits, class _Allocator> 2916template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2917_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2918basic_string<_CharT, _Traits, _Allocator>::append(_ForwardIterator __first, _ForwardIterator __last) { 2919 size_type __sz = size(); 2920 size_type __cap = capacity(); 2921 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2922 if (__n) { 2923 if (__string_is_trivial_iterator<_ForwardIterator>::value && !__addr_in_range(*__first)) { 2924 if (__cap - __sz < __n) 2925 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2926 __annotate_increase(__n); 2927 auto __end = __copy_non_overlapping_range(__first, __last, std::__to_address(__get_pointer() + __sz)); 2928 traits_type::assign(*__end, value_type()); 2929 __set_size(__sz + __n); 2930 } else { 2931 const basic_string __temp(__first, __last, __alloc()); 2932 append(__temp.data(), __temp.size()); 2933 } 2934 } 2935 return *this; 2936} 2937 2938template <class _CharT, class _Traits, class _Allocator> 2939_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2940basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str, size_type __pos, size_type __n) { 2941 size_type __sz = __str.size(); 2942 if (__pos > __sz) 2943 __throw_out_of_range(); 2944 return append(__str.data() + __pos, std::min(__n, __sz - __pos)); 2945} 2946 2947template <class _CharT, class _Traits, class _Allocator> 2948template <class _Tp, 2949 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2950 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2951 int> > 2952_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2953basic_string<_CharT, _Traits, _Allocator>::append(const _Tp& __t, size_type __pos, size_type __n) { 2954 __self_view __sv = __t; 2955 size_type __sz = __sv.size(); 2956 if (__pos > __sz) 2957 __throw_out_of_range(); 2958 return append(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2959} 2960 2961template <class _CharT, class _Traits, class _Allocator> 2962_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2963basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s) { 2964 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::append received nullptr"); 2965 return append(__s, traits_type::length(__s)); 2966} 2967 2968// insert 2969 2970template <class _CharT, class _Traits, class _Allocator> 2971_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2972basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s, size_type __n) { 2973 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::insert received nullptr"); 2974 size_type __sz = size(); 2975 if (__pos > __sz) 2976 __throw_out_of_range(); 2977 size_type __cap = capacity(); 2978 if (__cap - __sz >= __n) { 2979 if (__n) { 2980 __annotate_increase(__n); 2981 value_type* __p = std::__to_address(__get_pointer()); 2982 size_type __n_move = __sz - __pos; 2983 if (__n_move != 0) { 2984 if (std::__is_pointer_in_range(__p + __pos, __p + __sz, __s)) 2985 __s += __n; 2986 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 2987 } 2988 traits_type::move(__p + __pos, __s, __n); 2989 __sz += __n; 2990 __set_size(__sz); 2991 traits_type::assign(__p[__sz], value_type()); 2992 } 2993 } else 2994 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); 2995 return *this; 2996} 2997 2998template <class _CharT, class _Traits, class _Allocator> 2999_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3000basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, size_type __n, value_type __c) { 3001 size_type __sz = size(); 3002 if (__pos > __sz) 3003 __throw_out_of_range(); 3004 if (__n) { 3005 size_type __cap = capacity(); 3006 value_type* __p; 3007 if (__cap - __sz >= __n) { 3008 __annotate_increase(__n); 3009 __p = std::__to_address(__get_pointer()); 3010 size_type __n_move = __sz - __pos; 3011 if (__n_move != 0) 3012 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 3013 } else { 3014 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n); 3015 __p = std::__to_address(__get_long_pointer()); 3016 } 3017 traits_type::assign(__p + __pos, __n, __c); 3018 __sz += __n; 3019 __set_size(__sz); 3020 traits_type::assign(__p[__sz], value_type()); 3021 } 3022 return *this; 3023} 3024 3025template <class _CharT, class _Traits, class _Allocator> 3026template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 3027_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3028basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) { 3029 const basic_string __temp(__first, __last, __alloc()); 3030 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 3031} 3032 3033template <class _CharT, class _Traits, class _Allocator> 3034template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 3035_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3036basic_string<_CharT, _Traits, _Allocator>::insert( 3037 const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) { 3038 auto __n = static_cast<size_type>(std::distance(__first, __last)); 3039 return __insert_with_size(__pos, __first, __last, __n); 3040} 3041 3042template <class _CharT, class _Traits, class _Allocator> 3043template <class _Iterator, class _Sentinel> 3044_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3045basic_string<_CharT, _Traits, _Allocator>::__insert_with_size( 3046 const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n) { 3047 size_type __ip = static_cast<size_type>(__pos - begin()); 3048 if (__n == 0) 3049 return begin() + __ip; 3050 3051 if (__string_is_trivial_iterator<_Iterator>::value && !__addr_in_range(*__first)) { 3052 return __insert_from_safe_copy(__n, __ip, __first, __last); 3053 } else { 3054 const basic_string __temp(__init_with_sentinel_tag(), __first, __last, __alloc()); 3055 return __insert_from_safe_copy(__n, __ip, __temp.begin(), __temp.end()); 3056 } 3057} 3058 3059template <class _CharT, class _Traits, class _Allocator> 3060_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3061basic_string<_CharT, _Traits, _Allocator>::insert( 3062 size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n) { 3063 size_type __str_sz = __str.size(); 3064 if (__pos2 > __str_sz) 3065 __throw_out_of_range(); 3066 return insert(__pos1, __str.data() + __pos2, std::min(__n, __str_sz - __pos2)); 3067} 3068 3069template <class _CharT, class _Traits, class _Allocator> 3070template <class _Tp, 3071 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3072 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3073 int> > 3074_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3075basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n) { 3076 __self_view __sv = __t; 3077 size_type __str_sz = __sv.size(); 3078 if (__pos2 > __str_sz) 3079 __throw_out_of_range(); 3080 return insert(__pos1, __sv.data() + __pos2, std::min(__n, __str_sz - __pos2)); 3081} 3082 3083template <class _CharT, class _Traits, class _Allocator> 3084_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3085basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) { 3086 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::insert received nullptr"); 3087 return insert(__pos, __s, traits_type::length(__s)); 3088} 3089 3090template <class _CharT, class _Traits, class _Allocator> 3091_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3092basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) { 3093 size_type __ip = static_cast<size_type>(__pos - begin()); 3094 size_type __sz = size(); 3095 size_type __cap = capacity(); 3096 value_type* __p; 3097 if (__cap == __sz) { 3098 __grow_by_without_replace(__cap, 1, __sz, __ip, 0, 1); 3099 __p = std::__to_address(__get_long_pointer()); 3100 } else { 3101 __annotate_increase(1); 3102 __p = std::__to_address(__get_pointer()); 3103 size_type __n_move = __sz - __ip; 3104 if (__n_move != 0) 3105 traits_type::move(__p + __ip + 1, __p + __ip, __n_move); 3106 } 3107 traits_type::assign(__p[__ip], __c); 3108 traits_type::assign(__p[++__sz], value_type()); 3109 __set_size(__sz); 3110 return begin() + static_cast<difference_type>(__ip); 3111} 3112 3113// replace 3114 3115template <class _CharT, class _Traits, class _Allocator> 3116_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3117basic_string<_CharT, _Traits, _Allocator>::replace( 3118 size_type __pos, size_type __n1, const value_type* __s, size_type __n2) 3119 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK { 3120 _LIBCPP_ASSERT_NON_NULL(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); 3121 size_type __sz = size(); 3122 if (__pos > __sz) 3123 __throw_out_of_range(); 3124 __n1 = std::min(__n1, __sz - __pos); 3125 size_type __cap = capacity(); 3126 if (__cap - __sz + __n1 >= __n2) { 3127 value_type* __p = std::__to_address(__get_pointer()); 3128 if (__n1 != __n2) { 3129 if (__n2 > __n1) 3130 __annotate_increase(__n2 - __n1); 3131 size_type __n_move = __sz - __pos - __n1; 3132 if (__n_move != 0) { 3133 if (__n1 > __n2) { 3134 traits_type::move(__p + __pos, __s, __n2); 3135 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3136 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 3137 } 3138 if (std::__is_pointer_in_range(__p + __pos + 1, __p + __sz, __s)) { 3139 if (__p + __pos + __n1 <= __s) 3140 __s += __n2 - __n1; 3141 else // __p + __pos < __s < __p + __pos + __n1 3142 { 3143 traits_type::move(__p + __pos, __s, __n1); 3144 __pos += __n1; 3145 __s += __n2; 3146 __n2 -= __n1; 3147 __n1 = 0; 3148 } 3149 } 3150 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3151 } 3152 } 3153 traits_type::move(__p + __pos, __s, __n2); 3154 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 3155 } else 3156 __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); 3157 return *this; 3158} 3159 3160template <class _CharT, class _Traits, class _Allocator> 3161_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3162basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) { 3163 size_type __sz = size(); 3164 if (__pos > __sz) 3165 __throw_out_of_range(); 3166 __n1 = std::min(__n1, __sz - __pos); 3167 size_type __cap = capacity(); 3168 value_type* __p; 3169 if (__cap - __sz + __n1 >= __n2) { 3170 __p = std::__to_address(__get_pointer()); 3171 if (__n1 != __n2) { 3172 if (__n2 > __n1) 3173 __annotate_increase(__n2 - __n1); 3174 size_type __n_move = __sz - __pos - __n1; 3175 if (__n_move != 0) 3176 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3177 } 3178 } else { 3179 __grow_by_without_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); 3180 __p = std::__to_address(__get_long_pointer()); 3181 } 3182 traits_type::assign(__p + __pos, __n2, __c); 3183 return __null_terminate_at(__p, __sz - (__n1 - __n2)); 3184} 3185 3186template <class _CharT, class _Traits, class _Allocator> 3187template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> > 3188_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3189basic_string<_CharT, _Traits, _Allocator>::replace( 3190 const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2) { 3191 const basic_string __temp(__j1, __j2, __alloc()); 3192 return replace(__i1, __i2, __temp); 3193} 3194 3195template <class _CharT, class _Traits, class _Allocator> 3196_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3197basic_string<_CharT, _Traits, _Allocator>::replace( 3198 size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2) { 3199 size_type __str_sz = __str.size(); 3200 if (__pos2 > __str_sz) 3201 __throw_out_of_range(); 3202 return replace(__pos1, __n1, __str.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 3203} 3204 3205template <class _CharT, class _Traits, class _Allocator> 3206template <class _Tp, 3207 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3208 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3209 int> > 3210_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3211basic_string<_CharT, _Traits, _Allocator>::replace( 3212 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) { 3213 __self_view __sv = __t; 3214 size_type __str_sz = __sv.size(); 3215 if (__pos2 > __str_sz) 3216 __throw_out_of_range(); 3217 return replace(__pos1, __n1, __sv.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 3218} 3219 3220template <class _CharT, class _Traits, class _Allocator> 3221_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3222basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) { 3223 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::replace received nullptr"); 3224 return replace(__pos, __n1, __s, traits_type::length(__s)); 3225} 3226 3227// erase 3228 3229// 'externally instantiated' erase() implementation, called when __n != npos. 3230// Does not check __pos against size() 3231template <class _CharT, class _Traits, class _Allocator> 3232_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void 3233basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move(size_type __pos, size_type __n) { 3234 if (__n) { 3235 size_type __sz = size(); 3236 value_type* __p = std::__to_address(__get_pointer()); 3237 __n = std::min(__n, __sz - __pos); 3238 size_type __n_move = __sz - __pos - __n; 3239 if (__n_move != 0) 3240 traits_type::move(__p + __pos, __p + __pos + __n, __n_move); 3241 __null_terminate_at(__p, __sz - __n); 3242 } 3243} 3244 3245template <class _CharT, class _Traits, class _Allocator> 3246_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3247basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, size_type __n) { 3248 if (__pos > size()) 3249 __throw_out_of_range(); 3250 if (__n == npos) { 3251 __erase_to_end(__pos); 3252 } else { 3253 __erase_external_with_move(__pos, __n); 3254 } 3255 return *this; 3256} 3257 3258template <class _CharT, class _Traits, class _Allocator> 3259inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3260basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) { 3261 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS( 3262 __pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); 3263 iterator __b = begin(); 3264 size_type __r = static_cast<size_type>(__pos - __b); 3265 erase(__r, 1); 3266 return __b + static_cast<difference_type>(__r); 3267} 3268 3269template <class _CharT, class _Traits, class _Allocator> 3270inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3271basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) { 3272 _LIBCPP_ASSERT_VALID_INPUT_RANGE(__first <= __last, "string::erase(first, last) called with invalid range"); 3273 iterator __b = begin(); 3274 size_type __r = static_cast<size_type>(__first - __b); 3275 erase(__r, static_cast<size_type>(__last - __first)); 3276 return __b + static_cast<difference_type>(__r); 3277} 3278 3279template <class _CharT, class _Traits, class _Allocator> 3280inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::pop_back() { 3281 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::pop_back(): string is already empty"); 3282 __erase_to_end(size() - 1); 3283} 3284 3285template <class _CharT, class _Traits, class _Allocator> 3286inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT { 3287 size_type __old_size = size(); 3288 if (__is_long()) { 3289 traits_type::assign(*__get_long_pointer(), value_type()); 3290 __set_long_size(0); 3291 } else { 3292 traits_type::assign(*__get_short_pointer(), value_type()); 3293 __set_short_size(0); 3294 } 3295 __annotate_shrink(__old_size); 3296} 3297 3298template <class _CharT, class _Traits, class _Allocator> 3299_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) { 3300 size_type __sz = size(); 3301 if (__n > __sz) 3302 append(__n - __sz, __c); 3303 else 3304 __erase_to_end(__n); 3305} 3306 3307template <class _CharT, class _Traits, class _Allocator> 3308_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 3309basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) { 3310 size_type __sz = size(); 3311 if (__n > __sz) { 3312 __append_default_init(__n - __sz); 3313 } else 3314 __erase_to_end(__n); 3315} 3316 3317template <class _CharT, class _Traits, class _Allocator> 3318_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacity) { 3319 if (__requested_capacity > max_size()) 3320 __throw_length_error(); 3321 3322 // Make sure reserve(n) never shrinks. This is technically only required in C++20 3323 // and later (since P0966R1), however we provide consistent behavior in all Standard 3324 // modes because this function is instantiated in the shared library. 3325 if (__requested_capacity <= capacity()) 3326 return; 3327 3328 size_type __target_capacity = std::max(__requested_capacity, size()); 3329 __target_capacity = __recommend(__target_capacity); 3330 if (__target_capacity == capacity()) 3331 return; 3332 3333 __shrink_or_extend(__target_capacity); 3334} 3335 3336template <class _CharT, class _Traits, class _Allocator> 3337inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT { 3338 size_type __target_capacity = __recommend(size()); 3339 if (__target_capacity == capacity()) 3340 return; 3341 3342 __shrink_or_extend(__target_capacity); 3343} 3344 3345template <class _CharT, class _Traits, class _Allocator> 3346inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void 3347basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) { 3348 __annotate_delete(); 3349 size_type __cap = capacity(); 3350 size_type __sz = size(); 3351 3352 pointer __new_data, __p; 3353 bool __was_long, __now_long; 3354 if (__fits_in_sso(__target_capacity)) { 3355 __was_long = true; 3356 __now_long = false; 3357 __new_data = __get_short_pointer(); 3358 __p = __get_long_pointer(); 3359 } else { 3360 if (__target_capacity > __cap) { 3361 // Extend 3362 // - called from reserve should propagate the exception thrown. 3363 auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); 3364 __new_data = __allocation.ptr; 3365 __target_capacity = __allocation.count - 1; 3366 } else { 3367 // Shrink 3368 // - called from shrink_to_fit should not throw. 3369 // - called from reserve may throw but is not required to. 3370#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 3371 try { 3372#endif // _LIBCPP_HAS_NO_EXCEPTIONS 3373 auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); 3374 3375 // The Standard mandates shrink_to_fit() does not increase the capacity. 3376 // With equal capacity keep the existing buffer. This avoids extra work 3377 // due to swapping the elements. 3378 if (__allocation.count - 1 > __target_capacity) { 3379 __alloc_traits::deallocate(__alloc(), __allocation.ptr, __allocation.count); 3380 __annotate_new(__sz); // Undoes the __annotate_delete() 3381 return; 3382 } 3383 __new_data = __allocation.ptr; 3384 __target_capacity = __allocation.count - 1; 3385#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 3386 } catch (...) { 3387 return; 3388 } 3389#endif // _LIBCPP_HAS_NO_EXCEPTIONS 3390 } 3391 __begin_lifetime(__new_data, __target_capacity + 1); 3392 __now_long = true; 3393 __was_long = __is_long(); 3394 __p = __get_pointer(); 3395 } 3396 traits_type::copy(std::__to_address(__new_data), std::__to_address(__p), size() + 1); 3397 if (__was_long) 3398 __alloc_traits::deallocate(__alloc(), __p, __cap + 1); 3399 if (__now_long) { 3400 __set_long_cap(__target_capacity + 1); 3401 __set_long_size(__sz); 3402 __set_long_pointer(__new_data); 3403 } else 3404 __set_short_size(__sz); 3405 __annotate_new(__sz); 3406} 3407 3408template <class _CharT, class _Traits, class _Allocator> 3409_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3410basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const { 3411 if (__n >= size()) 3412 __throw_out_of_range(); 3413 return (*this)[__n]; 3414} 3415 3416template <class _CharT, class _Traits, class _Allocator> 3417_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::reference 3418basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) { 3419 if (__n >= size()) 3420 __throw_out_of_range(); 3421 return (*this)[__n]; 3422} 3423 3424template <class _CharT, class _Traits, class _Allocator> 3425_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3426basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const { 3427 size_type __sz = size(); 3428 if (__pos > __sz) 3429 __throw_out_of_range(); 3430 size_type __rlen = std::min(__n, __sz - __pos); 3431 traits_type::copy(__s, data() + __pos, __rlen); 3432 return __rlen; 3433} 3434 3435template <class _CharT, class _Traits, class _Allocator> 3436inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) 3437#if _LIBCPP_STD_VER >= 14 3438 _NOEXCEPT 3439#else 3440 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || __is_nothrow_swappable_v<allocator_type>) 3441#endif 3442{ 3443 _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( 3444 __alloc_traits::propagate_on_container_swap::value || __alloc_traits::is_always_equal::value || 3445 __alloc() == __str.__alloc(), 3446 "swapping non-equal allocators"); 3447 if (!__is_long()) 3448 __annotate_delete(); 3449 if (this != &__str && !__str.__is_long()) 3450 __str.__annotate_delete(); 3451 std::swap(__r_.first(), __str.__r_.first()); 3452 std::__swap_allocator(__alloc(), __str.__alloc()); 3453 if (!__is_long()) 3454 __annotate_new(__get_short_size()); 3455 if (this != &__str && !__str.__is_long()) 3456 __str.__annotate_new(__str.__get_short_size()); 3457} 3458 3459// find 3460 3461template <class _Traits> 3462struct _LIBCPP_HIDDEN __traits_eq { 3463 typedef typename _Traits::char_type char_type; 3464 _LIBCPP_HIDE_FROM_ABI bool operator()(const char_type& __x, const char_type& __y) _NOEXCEPT { 3465 return _Traits::eq(__x, __y); 3466 } 3467}; 3468 3469template <class _CharT, class _Traits, class _Allocator> 3470_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3471basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3472 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find(): received nullptr"); 3473 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3474} 3475 3476template <class _CharT, class _Traits, class _Allocator> 3477inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3478basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3479 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __str.data(), __pos, __str.size()); 3480} 3481 3482template <class _CharT, class _Traits, class _Allocator> 3483template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3484_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3485basic_string<_CharT, _Traits, _Allocator>::find(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3486 __self_view __sv = __t; 3487 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __sv.data(), __pos, __sv.size()); 3488} 3489 3490template <class _CharT, class _Traits, class _Allocator> 3491inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3492basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, size_type __pos) const _NOEXCEPT { 3493 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find(): received nullptr"); 3494 return std::__str_find<value_type, size_type, traits_type, npos>( 3495 data(), size(), __s, __pos, traits_type::length(__s)); 3496} 3497 3498template <class _CharT, class _Traits, class _Allocator> 3499_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3500basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, size_type __pos) const _NOEXCEPT { 3501 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3502} 3503 3504// rfind 3505 3506template <class _CharT, class _Traits, class _Allocator> 3507_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3508basic_string<_CharT, _Traits, _Allocator>::rfind( 3509 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3510 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); 3511 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3512} 3513 3514template <class _CharT, class _Traits, class _Allocator> 3515inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3516basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3517 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __str.data(), __pos, __str.size()); 3518} 3519 3520template <class _CharT, class _Traits, class _Allocator> 3521template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3522_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3523basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3524 __self_view __sv = __t; 3525 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __sv.data(), __pos, __sv.size()); 3526} 3527 3528template <class _CharT, class _Traits, class _Allocator> 3529inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3530basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, size_type __pos) const _NOEXCEPT { 3531 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::rfind(): received nullptr"); 3532 return std::__str_rfind<value_type, size_type, traits_type, npos>( 3533 data(), size(), __s, __pos, traits_type::length(__s)); 3534} 3535 3536template <class _CharT, class _Traits, class _Allocator> 3537_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3538basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, size_type __pos) const _NOEXCEPT { 3539 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3540} 3541 3542// find_first_of 3543 3544template <class _CharT, class _Traits, class _Allocator> 3545_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3546basic_string<_CharT, _Traits, _Allocator>::find_first_of( 3547 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3548 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); 3549 return std::__str_find_first_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3550} 3551 3552template <class _CharT, class _Traits, class _Allocator> 3553inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3554basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3555 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 3556 data(), size(), __str.data(), __pos, __str.size()); 3557} 3558 3559template <class _CharT, class _Traits, class _Allocator> 3560template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3561_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3562basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3563 __self_view __sv = __t; 3564 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 3565 data(), size(), __sv.data(), __pos, __sv.size()); 3566} 3567 3568template <class _CharT, class _Traits, class _Allocator> 3569inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3570basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3571 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_first_of(): received nullptr"); 3572 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 3573 data(), size(), __s, __pos, traits_type::length(__s)); 3574} 3575 3576template <class _CharT, class _Traits, class _Allocator> 3577inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3578basic_string<_CharT, _Traits, _Allocator>::find_first_of(value_type __c, size_type __pos) const _NOEXCEPT { 3579 return find(__c, __pos); 3580} 3581 3582// find_last_of 3583 3584template <class _CharT, class _Traits, class _Allocator> 3585inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3586basic_string<_CharT, _Traits, _Allocator>::find_last_of( 3587 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3588 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); 3589 return std::__str_find_last_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3590} 3591 3592template <class _CharT, class _Traits, class _Allocator> 3593inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3594basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3595 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 3596 data(), size(), __str.data(), __pos, __str.size()); 3597} 3598 3599template <class _CharT, class _Traits, class _Allocator> 3600template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3601_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3602basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3603 __self_view __sv = __t; 3604 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 3605 data(), size(), __sv.data(), __pos, __sv.size()); 3606} 3607 3608template <class _CharT, class _Traits, class _Allocator> 3609inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3610basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3611 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_last_of(): received nullptr"); 3612 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 3613 data(), size(), __s, __pos, traits_type::length(__s)); 3614} 3615 3616template <class _CharT, class _Traits, class _Allocator> 3617inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3618basic_string<_CharT, _Traits, _Allocator>::find_last_of(value_type __c, size_type __pos) const _NOEXCEPT { 3619 return rfind(__c, __pos); 3620} 3621 3622// find_first_not_of 3623 3624template <class _CharT, class _Traits, class _Allocator> 3625_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3626basic_string<_CharT, _Traits, _Allocator>::find_first_not_of( 3627 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3628 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); 3629 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3630} 3631 3632template <class _CharT, class _Traits, class _Allocator> 3633inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3634basic_string<_CharT, _Traits, _Allocator>::find_first_not_of( 3635 const basic_string& __str, size_type __pos) const _NOEXCEPT { 3636 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 3637 data(), size(), __str.data(), __pos, __str.size()); 3638} 3639 3640template <class _CharT, class _Traits, class _Allocator> 3641template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3642_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3643basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3644 __self_view __sv = __t; 3645 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 3646 data(), size(), __sv.data(), __pos, __sv.size()); 3647} 3648 3649template <class _CharT, class _Traits, class _Allocator> 3650inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3651basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3652 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_first_not_of(): received nullptr"); 3653 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 3654 data(), size(), __s, __pos, traits_type::length(__s)); 3655} 3656 3657template <class _CharT, class _Traits, class _Allocator> 3658inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3659basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(value_type __c, size_type __pos) const _NOEXCEPT { 3660 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3661} 3662 3663// find_last_not_of 3664 3665template <class _CharT, class _Traits, class _Allocator> 3666_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3667basic_string<_CharT, _Traits, _Allocator>::find_last_not_of( 3668 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3669 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); 3670 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3671} 3672 3673template <class _CharT, class _Traits, class _Allocator> 3674inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3675basic_string<_CharT, _Traits, _Allocator>::find_last_not_of( 3676 const basic_string& __str, size_type __pos) const _NOEXCEPT { 3677 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 3678 data(), size(), __str.data(), __pos, __str.size()); 3679} 3680 3681template <class _CharT, class _Traits, class _Allocator> 3682template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3683_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3684basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3685 __self_view __sv = __t; 3686 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 3687 data(), size(), __sv.data(), __pos, __sv.size()); 3688} 3689 3690template <class _CharT, class _Traits, class _Allocator> 3691inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3692basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3693 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_last_not_of(): received nullptr"); 3694 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 3695 data(), size(), __s, __pos, traits_type::length(__s)); 3696} 3697 3698template <class _CharT, class _Traits, class _Allocator> 3699inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3700basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(value_type __c, size_type __pos) const _NOEXCEPT { 3701 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3702} 3703 3704// compare 3705 3706template <class _CharT, class _Traits, class _Allocator> 3707template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3708_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const _NOEXCEPT { 3709 __self_view __sv = __t; 3710 size_t __lhs_sz = size(); 3711 size_t __rhs_sz = __sv.size(); 3712 int __result = traits_type::compare(data(), __sv.data(), std::min(__lhs_sz, __rhs_sz)); 3713 if (__result != 0) 3714 return __result; 3715 if (__lhs_sz < __rhs_sz) 3716 return -1; 3717 if (__lhs_sz > __rhs_sz) 3718 return 1; 3719 return 0; 3720} 3721 3722template <class _CharT, class _Traits, class _Allocator> 3723inline _LIBCPP_CONSTEXPR_SINCE_CXX20 int 3724basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT { 3725 return compare(__self_view(__str)); 3726} 3727 3728template <class _CharT, class _Traits, class _Allocator> 3729inline _LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3730 size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const { 3731 _LIBCPP_ASSERT_NON_NULL(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); 3732 size_type __sz = size(); 3733 if (__pos1 > __sz || __n2 == npos) 3734 __throw_out_of_range(); 3735 size_type __rlen = std::min(__n1, __sz - __pos1); 3736 int __r = traits_type::compare(data() + __pos1, __s, std::min(__rlen, __n2)); 3737 if (__r == 0) { 3738 if (__rlen < __n2) 3739 __r = -1; 3740 else if (__rlen > __n2) 3741 __r = 1; 3742 } 3743 return __r; 3744} 3745 3746template <class _CharT, class _Traits, class _Allocator> 3747template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3748_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3749basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, size_type __n1, const _Tp& __t) const { 3750 __self_view __sv = __t; 3751 return compare(__pos1, __n1, __sv.data(), __sv.size()); 3752} 3753 3754template <class _CharT, class _Traits, class _Allocator> 3755inline _LIBCPP_CONSTEXPR_SINCE_CXX20 int 3756basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, size_type __n1, const basic_string& __str) const { 3757 return compare(__pos1, __n1, __str.data(), __str.size()); 3758} 3759 3760template <class _CharT, class _Traits, class _Allocator> 3761template <class _Tp, 3762 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3763 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3764 int> > 3765_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3766 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) const { 3767 __self_view __sv = __t; 3768 return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 3769} 3770 3771template <class _CharT, class _Traits, class _Allocator> 3772_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3773 size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2) const { 3774 return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); 3775} 3776 3777template <class _CharT, class _Traits, class _Allocator> 3778_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3779basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT { 3780 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::compare(): received nullptr"); 3781 return compare(0, npos, __s, traits_type::length(__s)); 3782} 3783 3784template <class _CharT, class _Traits, class _Allocator> 3785_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3786basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, size_type __n1, const value_type* __s) const { 3787 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::compare(): received nullptr"); 3788 return compare(__pos1, __n1, __s, traits_type::length(__s)); 3789} 3790 3791// __invariants 3792 3793template <class _CharT, class _Traits, class _Allocator> 3794inline _LIBCPP_CONSTEXPR_SINCE_CXX20 bool basic_string<_CharT, _Traits, _Allocator>::__invariants() const { 3795 if (size() > capacity()) 3796 return false; 3797 if (capacity() < __min_cap - 1) 3798 return false; 3799 if (data() == nullptr) 3800 return false; 3801 if (!_Traits::eq(data()[size()], value_type())) 3802 return false; 3803 return true; 3804} 3805 3806// __clear_and_shrink 3807 3808template <class _CharT, class _Traits, class _Allocator> 3809inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT { 3810 clear(); 3811 if (__is_long()) { 3812 __annotate_delete(); 3813 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1); 3814 __r_.first() = __rep(); 3815 } 3816} 3817 3818// operator== 3819 3820template <class _CharT, class _Traits, class _Allocator> 3821inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool 3822operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3823 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3824#if _LIBCPP_STD_VER >= 20 3825 return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); 3826#else 3827 size_t __lhs_sz = __lhs.size(); 3828 return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), __rhs.data(), __lhs_sz) == 0; 3829#endif 3830} 3831 3832template <class _Allocator> 3833inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool 3834operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, 3835 const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT { 3836 size_t __sz = __lhs.size(); 3837 if (__sz != __rhs.size()) 3838 return false; 3839 return char_traits<char>::compare(__lhs.data(), __rhs.data(), __sz) == 0; 3840} 3841 3842#if _LIBCPP_STD_VER <= 17 3843template <class _CharT, class _Traits, class _Allocator> 3844inline _LIBCPP_HIDE_FROM_ABI bool 3845operator==(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3846 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3847 _LIBCPP_ASSERT_NON_NULL(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); 3848 size_t __lhs_len = _Traits::length(__lhs); 3849 if (__lhs_len != __rhs.size()) 3850 return false; 3851 return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; 3852} 3853#endif // _LIBCPP_STD_VER <= 17 3854 3855template <class _CharT, class _Traits, class _Allocator> 3856inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool 3857operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3858#if _LIBCPP_STD_VER >= 20 3859 return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); 3860#else 3861 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3862 _LIBCPP_ASSERT_NON_NULL(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); 3863 size_t __rhs_len = _Traits::length(__rhs); 3864 if (__rhs_len != __lhs.size()) 3865 return false; 3866 return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; 3867#endif 3868} 3869 3870#if _LIBCPP_STD_VER >= 20 3871 3872template <class _CharT, class _Traits, class _Allocator> 3873_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3874 const basic_string<_CharT, _Traits, _Allocator>& __rhs) noexcept { 3875 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 3876} 3877 3878template <class _CharT, class _Traits, class _Allocator> 3879_LIBCPP_HIDE_FROM_ABI constexpr auto 3880operator<=>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) { 3881 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 3882} 3883 3884#else // _LIBCPP_STD_VER >= 20 3885 3886template <class _CharT, class _Traits, class _Allocator> 3887inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3888 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3889 return !(__lhs == __rhs); 3890} 3891 3892template <class _CharT, class _Traits, class _Allocator> 3893inline _LIBCPP_HIDE_FROM_ABI bool 3894operator!=(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3895 return !(__lhs == __rhs); 3896} 3897 3898template <class _CharT, class _Traits, class _Allocator> 3899inline _LIBCPP_HIDE_FROM_ABI bool 3900operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3901 return !(__lhs == __rhs); 3902} 3903 3904// operator< 3905 3906template <class _CharT, class _Traits, class _Allocator> 3907inline _LIBCPP_HIDE_FROM_ABI bool operator<(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3908 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3909 return __lhs.compare(__rhs) < 0; 3910} 3911 3912template <class _CharT, class _Traits, class _Allocator> 3913inline _LIBCPP_HIDE_FROM_ABI bool 3914operator<(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3915 return __lhs.compare(__rhs) < 0; 3916} 3917 3918template <class _CharT, class _Traits, class _Allocator> 3919inline _LIBCPP_HIDE_FROM_ABI bool 3920operator<(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3921 return __rhs.compare(__lhs) > 0; 3922} 3923 3924// operator> 3925 3926template <class _CharT, class _Traits, class _Allocator> 3927inline _LIBCPP_HIDE_FROM_ABI bool operator>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3928 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3929 return __rhs < __lhs; 3930} 3931 3932template <class _CharT, class _Traits, class _Allocator> 3933inline _LIBCPP_HIDE_FROM_ABI bool 3934operator>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3935 return __rhs < __lhs; 3936} 3937 3938template <class _CharT, class _Traits, class _Allocator> 3939inline _LIBCPP_HIDE_FROM_ABI bool 3940operator>(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3941 return __rhs < __lhs; 3942} 3943 3944// operator<= 3945 3946template <class _CharT, class _Traits, class _Allocator> 3947inline _LIBCPP_HIDE_FROM_ABI bool operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3948 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3949 return !(__rhs < __lhs); 3950} 3951 3952template <class _CharT, class _Traits, class _Allocator> 3953inline _LIBCPP_HIDE_FROM_ABI bool 3954operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3955 return !(__rhs < __lhs); 3956} 3957 3958template <class _CharT, class _Traits, class _Allocator> 3959inline _LIBCPP_HIDE_FROM_ABI bool 3960operator<=(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3961 return !(__rhs < __lhs); 3962} 3963 3964// operator>= 3965 3966template <class _CharT, class _Traits, class _Allocator> 3967inline _LIBCPP_HIDE_FROM_ABI bool operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3968 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3969 return !(__lhs < __rhs); 3970} 3971 3972template <class _CharT, class _Traits, class _Allocator> 3973inline _LIBCPP_HIDE_FROM_ABI bool 3974operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3975 return !(__lhs < __rhs); 3976} 3977 3978template <class _CharT, class _Traits, class _Allocator> 3979inline _LIBCPP_HIDE_FROM_ABI bool 3980operator>=(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3981 return !(__lhs < __rhs); 3982} 3983#endif // _LIBCPP_STD_VER >= 20 3984 3985// operator + 3986 3987template <class _CharT, class _Traits, class _Allocator> 3988_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 3989operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3990 const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 3991 using _String = basic_string<_CharT, _Traits, _Allocator>; 3992 auto __lhs_sz = __lhs.size(); 3993 auto __rhs_sz = __rhs.size(); 3994 _String __r(__uninitialized_size_tag(), 3995 __lhs_sz + __rhs_sz, 3996 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 3997 auto __ptr = std::__to_address(__r.__get_pointer()); 3998 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 3999 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4000 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4001 return __r; 4002} 4003 4004template <class _CharT, class _Traits, class _Allocator> 4005_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4006operator+(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4007 using _String = basic_string<_CharT, _Traits, _Allocator>; 4008 auto __lhs_sz = _Traits::length(__lhs); 4009 auto __rhs_sz = __rhs.size(); 4010 _String __r(__uninitialized_size_tag(), 4011 __lhs_sz + __rhs_sz, 4012 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4013 auto __ptr = std::__to_address(__r.__get_pointer()); 4014 _Traits::copy(__ptr, __lhs, __lhs_sz); 4015 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4016 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4017 return __r; 4018} 4019 4020template <class _CharT, class _Traits, class _Allocator> 4021_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4022operator+(_CharT __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4023 using _String = basic_string<_CharT, _Traits, _Allocator>; 4024 typename _String::size_type __rhs_sz = __rhs.size(); 4025 _String __r(__uninitialized_size_tag(), 4026 __rhs_sz + 1, 4027 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4028 auto __ptr = std::__to_address(__r.__get_pointer()); 4029 _Traits::assign(__ptr, 1, __lhs); 4030 _Traits::copy(__ptr + 1, __rhs.data(), __rhs_sz); 4031 _Traits::assign(__ptr + 1 + __rhs_sz, 1, _CharT()); 4032 return __r; 4033} 4034 4035template <class _CharT, class _Traits, class _Allocator> 4036inline _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4037operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) { 4038 using _String = basic_string<_CharT, _Traits, _Allocator>; 4039 typename _String::size_type __lhs_sz = __lhs.size(); 4040 typename _String::size_type __rhs_sz = _Traits::length(__rhs); 4041 _String __r(__uninitialized_size_tag(), 4042 __lhs_sz + __rhs_sz, 4043 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4044 auto __ptr = std::__to_address(__r.__get_pointer()); 4045 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4046 _Traits::copy(__ptr + __lhs_sz, __rhs, __rhs_sz); 4047 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4048 return __r; 4049} 4050 4051template <class _CharT, class _Traits, class _Allocator> 4052_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4053operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) { 4054 using _String = basic_string<_CharT, _Traits, _Allocator>; 4055 typename _String::size_type __lhs_sz = __lhs.size(); 4056 _String __r(__uninitialized_size_tag(), 4057 __lhs_sz + 1, 4058 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4059 auto __ptr = std::__to_address(__r.__get_pointer()); 4060 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4061 _Traits::assign(__ptr + __lhs_sz, 1, __rhs); 4062 _Traits::assign(__ptr + 1 + __lhs_sz, 1, _CharT()); 4063 return __r; 4064} 4065 4066#ifndef _LIBCPP_CXX03_LANG 4067 4068template <class _CharT, class _Traits, class _Allocator> 4069inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4070operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4071 return std::move(__lhs.append(__rhs)); 4072} 4073 4074template <class _CharT, class _Traits, class _Allocator> 4075inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4076operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4077 return std::move(__rhs.insert(0, __lhs)); 4078} 4079 4080template <class _CharT, class _Traits, class _Allocator> 4081inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4082operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4083 return std::move(__lhs.append(__rhs)); 4084} 4085 4086template <class _CharT, class _Traits, class _Allocator> 4087inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4088operator+(const _CharT* __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4089 return std::move(__rhs.insert(0, __lhs)); 4090} 4091 4092template <class _CharT, class _Traits, class _Allocator> 4093inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4094operator+(_CharT __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4095 __rhs.insert(__rhs.begin(), __lhs); 4096 return std::move(__rhs); 4097} 4098 4099template <class _CharT, class _Traits, class _Allocator> 4100inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4101operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) { 4102 return std::move(__lhs.append(__rhs)); 4103} 4104 4105template <class _CharT, class _Traits, class _Allocator> 4106inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4107operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) { 4108 __lhs.push_back(__rhs); 4109 return std::move(__lhs); 4110} 4111 4112#endif // _LIBCPP_CXX03_LANG 4113 4114#if _LIBCPP_STD_VER >= 26 4115 4116template <class _CharT, class _Traits, class _Allocator> 4117_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4118operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4119 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) { 4120 using _String = basic_string<_CharT, _Traits, _Allocator>; 4121 typename _String::size_type __lhs_sz = __lhs.size(); 4122 typename _String::size_type __rhs_sz = __rhs.size(); 4123 _String __r(__uninitialized_size_tag(), 4124 __lhs_sz + __rhs_sz, 4125 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4126 auto __ptr = std::__to_address(__r.__get_pointer()); 4127 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4128 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4129 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4130 return __r; 4131} 4132 4133template <class _CharT, class _Traits, class _Allocator> 4134_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4135operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, 4136 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) { 4137 __lhs.append(__rhs); 4138 return std::move(__lhs); 4139} 4140 4141template <class _CharT, class _Traits, class _Allocator> 4142_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4143operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, 4144 const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4145 using _String = basic_string<_CharT, _Traits, _Allocator>; 4146 typename _String::size_type __lhs_sz = __lhs.size(); 4147 typename _String::size_type __rhs_sz = __rhs.size(); 4148 _String __r(__uninitialized_size_tag(), 4149 __lhs_sz + __rhs_sz, 4150 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4151 auto __ptr = std::__to_address(__r.__get_pointer()); 4152 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4153 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4154 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4155 return __r; 4156} 4157 4158template <class _CharT, class _Traits, class _Allocator> 4159_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4160operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, 4161 basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4162 __rhs.insert(0, __lhs); 4163 return std::move(__rhs); 4164} 4165 4166#endif // _LIBCPP_STD_VER >= 26 4167 4168// swap 4169 4170template <class _CharT, class _Traits, class _Allocator> 4171inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 4172swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>& __rhs) 4173 _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) { 4174 __lhs.swap(__rhs); 4175} 4176 4177_LIBCPP_EXPORTED_FROM_ABI int stoi(const string& __str, size_t* __idx = nullptr, int __base = 10); 4178_LIBCPP_EXPORTED_FROM_ABI long stol(const string& __str, size_t* __idx = nullptr, int __base = 10); 4179_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul(const string& __str, size_t* __idx = nullptr, int __base = 10); 4180_LIBCPP_EXPORTED_FROM_ABI long long stoll(const string& __str, size_t* __idx = nullptr, int __base = 10); 4181_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const string& __str, size_t* __idx = nullptr, int __base = 10); 4182 4183_LIBCPP_EXPORTED_FROM_ABI float stof(const string& __str, size_t* __idx = nullptr); 4184_LIBCPP_EXPORTED_FROM_ABI double stod(const string& __str, size_t* __idx = nullptr); 4185_LIBCPP_EXPORTED_FROM_ABI long double stold(const string& __str, size_t* __idx = nullptr); 4186 4187_LIBCPP_EXPORTED_FROM_ABI string to_string(int __val); 4188_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned __val); 4189_LIBCPP_EXPORTED_FROM_ABI string to_string(long __val); 4190_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long __val); 4191_LIBCPP_EXPORTED_FROM_ABI string to_string(long long __val); 4192_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long long __val); 4193_LIBCPP_EXPORTED_FROM_ABI string to_string(float __val); 4194_LIBCPP_EXPORTED_FROM_ABI string to_string(double __val); 4195_LIBCPP_EXPORTED_FROM_ABI string to_string(long double __val); 4196 4197#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4198_LIBCPP_EXPORTED_FROM_ABI int stoi(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4199_LIBCPP_EXPORTED_FROM_ABI long stol(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4200_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4201_LIBCPP_EXPORTED_FROM_ABI long long stoll(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4202_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4203 4204_LIBCPP_EXPORTED_FROM_ABI float stof(const wstring& __str, size_t* __idx = nullptr); 4205_LIBCPP_EXPORTED_FROM_ABI double stod(const wstring& __str, size_t* __idx = nullptr); 4206_LIBCPP_EXPORTED_FROM_ABI long double stold(const wstring& __str, size_t* __idx = nullptr); 4207 4208_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(int __val); 4209_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned __val); 4210_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long __val); 4211_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long __val); 4212_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long long __val); 4213_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long long __val); 4214_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(float __val); 4215_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(double __val); 4216_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long double __val); 4217#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS 4218 4219template <class _CharT, class _Traits, class _Allocator> 4220_LIBCPP_TEMPLATE_DATA_VIS const typename basic_string<_CharT, _Traits, _Allocator>::size_type 4221 basic_string<_CharT, _Traits, _Allocator>::npos; 4222 4223template <class _CharT, class _Allocator> 4224struct __string_hash : public __unary_function<basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> { 4225 _LIBCPP_HIDE_FROM_ABI size_t 4226 operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT { 4227 return std::__do_string_hash(__val.data(), __val.data() + __val.size()); 4228 } 4229}; 4230 4231template <class _Allocator> 4232struct hash<basic_string<char, char_traits<char>, _Allocator> > : __string_hash<char, _Allocator> {}; 4233 4234#ifndef _LIBCPP_HAS_NO_CHAR8_T 4235template <class _Allocator> 4236struct hash<basic_string<char8_t, char_traits<char8_t>, _Allocator> > : __string_hash<char8_t, _Allocator> {}; 4237#endif 4238 4239template <class _Allocator> 4240struct hash<basic_string<char16_t, char_traits<char16_t>, _Allocator> > : __string_hash<char16_t, _Allocator> {}; 4241 4242template <class _Allocator> 4243struct hash<basic_string<char32_t, char_traits<char32_t>, _Allocator> > : __string_hash<char32_t, _Allocator> {}; 4244 4245#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4246template <class _Allocator> 4247struct hash<basic_string<wchar_t, char_traits<wchar_t>, _Allocator> > : __string_hash<wchar_t, _Allocator> {}; 4248#endif 4249 4250template <class _CharT, class _Traits, class _Allocator> 4251_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>& 4252operator<<(basic_ostream<_CharT, _Traits>& __os, const basic_string<_CharT, _Traits, _Allocator>& __str); 4253 4254template <class _CharT, class _Traits, class _Allocator> 4255_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4256operator>>(basic_istream<_CharT, _Traits>& __is, basic_string<_CharT, _Traits, _Allocator>& __str); 4257 4258template <class _CharT, class _Traits, class _Allocator> 4259_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4260getline(basic_istream<_CharT, _Traits>& __is, basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4261 4262template <class _CharT, class _Traits, class _Allocator> 4263inline _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4264getline(basic_istream<_CharT, _Traits>& __is, basic_string<_CharT, _Traits, _Allocator>& __str); 4265 4266template <class _CharT, class _Traits, class _Allocator> 4267inline _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4268getline(basic_istream<_CharT, _Traits>&& __is, basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4269 4270template <class _CharT, class _Traits, class _Allocator> 4271inline _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4272getline(basic_istream<_CharT, _Traits>&& __is, basic_string<_CharT, _Traits, _Allocator>& __str); 4273 4274#if _LIBCPP_STD_VER >= 20 4275template <class _CharT, class _Traits, class _Allocator, class _Up> 4276inline _LIBCPP_HIDE_FROM_ABI typename basic_string<_CharT, _Traits, _Allocator>::size_type 4277erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { 4278 auto __old_size = __str.size(); 4279 __str.erase(std::remove(__str.begin(), __str.end(), __v), __str.end()); 4280 return __old_size - __str.size(); 4281} 4282 4283template <class _CharT, class _Traits, class _Allocator, class _Predicate> 4284inline _LIBCPP_HIDE_FROM_ABI typename basic_string<_CharT, _Traits, _Allocator>::size_type 4285erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, _Predicate __pred) { 4286 auto __old_size = __str.size(); 4287 __str.erase(std::remove_if(__str.begin(), __str.end(), __pred), __str.end()); 4288 return __old_size - __str.size(); 4289} 4290#endif 4291 4292#if _LIBCPP_STD_VER >= 14 4293// Literal suffixes for basic_string [basic.string.literals] 4294inline namespace literals { 4295inline namespace string_literals { 4296inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<char> 4297operator""s(const char* __str, size_t __len) { 4298 return basic_string<char>(__str, __len); 4299} 4300 4301# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4302inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<wchar_t> 4303operator""s(const wchar_t* __str, size_t __len) { 4304 return basic_string<wchar_t>(__str, __len); 4305} 4306# endif 4307 4308# ifndef _LIBCPP_HAS_NO_CHAR8_T 4309inline _LIBCPP_HIDE_FROM_ABI constexpr basic_string<char8_t> operator""s(const char8_t* __str, size_t __len) { 4310 return basic_string<char8_t>(__str, __len); 4311} 4312# endif 4313 4314inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<char16_t> 4315operator""s(const char16_t* __str, size_t __len) { 4316 return basic_string<char16_t>(__str, __len); 4317} 4318 4319inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<char32_t> 4320operator""s(const char32_t* __str, size_t __len) { 4321 return basic_string<char32_t>(__str, __len); 4322} 4323} // namespace string_literals 4324} // namespace literals 4325 4326# if _LIBCPP_STD_VER >= 20 4327template <> 4328inline constexpr bool __format::__enable_insertable<std::basic_string<char>> = true; 4329# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4330template <> 4331inline constexpr bool __format::__enable_insertable<std::basic_string<wchar_t>> = true; 4332# endif 4333# endif 4334 4335#endif 4336 4337_LIBCPP_END_NAMESPACE_STD 4338 4339_LIBCPP_POP_MACROS 4340 4341#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 4342# include <algorithm> 4343# include <concepts> 4344# include <cstdlib> 4345# include <iterator> 4346# include <new> 4347# include <type_traits> 4348# include <typeinfo> 4349# include <utility> 4350#endif 4351 4352#endif // _LIBCPP_STRING 4353