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/noexcept_move_assign_container.h> 613#include <__memory/pointer_traits.h> 614#include <__memory/swap_allocator.h> 615#include <__memory_resource/polymorphic_allocator.h> 616#include <__ranges/access.h> 617#include <__ranges/concepts.h> 618#include <__ranges/container_compatible_range.h> 619#include <__ranges/from_range.h> 620#include <__ranges/size.h> 621#include <__string/char_traits.h> 622#include <__string/extern_template_lists.h> 623#include <__type_traits/conditional.h> 624#include <__type_traits/enable_if.h> 625#include <__type_traits/is_allocator.h> 626#include <__type_traits/is_array.h> 627#include <__type_traits/is_convertible.h> 628#include <__type_traits/is_nothrow_assignable.h> 629#include <__type_traits/is_nothrow_constructible.h> 630#include <__type_traits/is_same.h> 631#include <__type_traits/is_standard_layout.h> 632#include <__type_traits/is_trivial.h> 633#include <__type_traits/is_trivially_relocatable.h> 634#include <__type_traits/remove_cvref.h> 635#include <__type_traits/void_t.h> 636#include <__utility/auto_cast.h> 637#include <__utility/declval.h> 638#include <__utility/forward.h> 639#include <__utility/is_pointer_in_range.h> 640#include <__utility/move.h> 641#include <__utility/scope_guard.h> 642#include <__utility/swap.h> 643#include <__utility/unreachable.h> 644#include <climits> 645#include <cstdio> // EOF 646#include <cstring> 647#include <limits> 648#include <stdexcept> 649#include <string_view> 650#include <version> 651 652#if _LIBCPP_HAS_WIDE_CHARACTERS 653# include <cwchar> 654#endif 655 656// standard-mandated includes 657 658// [iterator.range] 659#include <__iterator/access.h> 660#include <__iterator/data.h> 661#include <__iterator/empty.h> 662#include <__iterator/reverse_access.h> 663#include <__iterator/size.h> 664 665// [string.syn] 666#include <compare> 667#include <initializer_list> 668 669#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 670# pragma GCC system_header 671#endif 672 673_LIBCPP_PUSH_MACROS 674#include <__undef_macros> 675 676#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 677# define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS __attribute__((__no_sanitize__("address"))) 678// This macro disables AddressSanitizer (ASan) instrumentation for a specific function, 679// allowing memory accesses that would normally trigger ASan errors to proceed without crashing. 680// This is useful for accessing parts of objects memory, which should not be accessed, 681// such as unused bytes in short strings, that should never be accessed 682// by other parts of the program. 683#else 684# define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 685#endif 686 687_LIBCPP_BEGIN_NAMESPACE_STD 688 689// basic_string 690 691template <class _CharT, class _Traits, class _Allocator> 692basic_string<_CharT, _Traits, _Allocator> _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 693operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const basic_string<_CharT, _Traits, _Allocator>& __y); 694 695template <class _CharT, class _Traits, class _Allocator> 696_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 697operator+(const _CharT* __x, const basic_string<_CharT, _Traits, _Allocator>& __y); 698 699template <class _CharT, class _Traits, class _Allocator> 700_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 701operator+(_CharT __x, const basic_string<_CharT, _Traits, _Allocator>& __y); 702 703template <class _CharT, class _Traits, class _Allocator> 704inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 705operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); 706 707template <class _CharT, class _Traits, class _Allocator> 708_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 709operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); 710 711#if _LIBCPP_STD_VER >= 26 712 713template <class _CharT, class _Traits, class _Allocator> 714_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 715operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 716 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs); 717 718template <class _CharT, class _Traits, class _Allocator> 719_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 720operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, type_identity_t<basic_string_view<_CharT, _Traits>> __rhs); 721 722template <class _CharT, class _Traits, class _Allocator> 723_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 724operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, 725 const basic_string<_CharT, _Traits, _Allocator>& __rhs); 726 727template <class _CharT, class _Traits, class _Allocator> 728_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 729operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs); 730 731#endif 732 733extern template _LIBCPP_EXPORTED_FROM_ABI string operator+ 734 <char, char_traits<char>, allocator<char> >(char const*, string const&); 735 736template <class _Iter> 737struct __string_is_trivial_iterator : public false_type {}; 738 739template <class _Tp> 740struct __string_is_trivial_iterator<_Tp*> : public is_arithmetic<_Tp> {}; 741 742template <class _Iter> 743struct __string_is_trivial_iterator<__wrap_iter<_Iter> > : public __string_is_trivial_iterator<_Iter> {}; 744 745template <class _CharT, class _Traits, class _Tp> 746struct __can_be_converted_to_string_view 747 : public _BoolConstant< is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && 748 !is_convertible<const _Tp&, const _CharT*>::value > {}; 749 750struct __uninitialized_size_tag {}; 751struct __init_with_sentinel_tag {}; 752 753template <size_t _PaddingSize> 754struct __padding { 755 char __padding_[_PaddingSize]; 756}; 757 758template <> 759struct __padding<0> {}; 760 761template <class _CharT, class _Traits, class _Allocator> 762class basic_string { 763private: 764 using __default_allocator_type = allocator<_CharT>; 765 766public: 767 typedef basic_string __self; 768 typedef basic_string_view<_CharT, _Traits> __self_view; 769 typedef _Traits traits_type; 770 typedef _CharT value_type; 771 typedef _Allocator allocator_type; 772 typedef allocator_traits<allocator_type> __alloc_traits; 773 typedef typename __alloc_traits::size_type size_type; 774 typedef typename __alloc_traits::difference_type difference_type; 775 typedef value_type& reference; 776 typedef const value_type& const_reference; 777 typedef typename __alloc_traits::pointer pointer; 778 typedef typename __alloc_traits::const_pointer const_pointer; 779 780 // A basic_string contains the following members which may be trivially relocatable: 781 // - pointer: is currently assumed to be trivially relocatable, but is still checked in case that changes 782 // - size_type: is always trivially relocatable, since it has to be an integral type 783 // - value_type: is always trivially relocatable, since it has to be trivial 784 // - unsigned char: is a fundamental type, so it's trivially relocatable 785 // - allocator_type: may or may not be trivially relocatable, so it's checked 786 // 787 // This string implementation doesn't contain any references into itself. It only contains a bit that says whether 788 // it is in small or large string mode, so the entire structure is trivially relocatable if its members are. 789#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 790 // When compiling with AddressSanitizer (ASan), basic_string cannot be trivially 791 // relocatable. Because the object's memory might be poisoned when its content 792 // is kept inside objects memory (short string optimization), instead of in allocated 793 // external memory. In such cases, the destructor is responsible for unpoisoning 794 // the memory to avoid triggering false positives. 795 // Therefore it's crucial to ensure the destructor is called. 796 using __trivially_relocatable = void; 797#else 798 using __trivially_relocatable = __conditional_t< 799 __libcpp_is_trivially_relocatable<allocator_type>::value && __libcpp_is_trivially_relocatable<pointer>::value, 800 basic_string, 801 void>; 802#endif 803 804#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 805 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pointer __asan_volatile_wrapper(pointer const& __ptr) const { 806 if (__libcpp_is_constant_evaluated()) 807 return __ptr; 808 809 pointer volatile __copy_ptr = __ptr; 810 811 return const_cast<pointer&>(__copy_ptr); 812 } 813 814 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_pointer 815 __asan_volatile_wrapper(const_pointer const& __ptr) const { 816 if (__libcpp_is_constant_evaluated()) 817 return __ptr; 818 819 const_pointer volatile __copy_ptr = __ptr; 820 821 return const_cast<const_pointer&>(__copy_ptr); 822 } 823# define _LIBCPP_ASAN_VOLATILE_WRAPPER(PTR) __asan_volatile_wrapper(PTR) 824#else 825# define _LIBCPP_ASAN_VOLATILE_WRAPPER(PTR) PTR 826#endif 827 828 static_assert(!is_array<value_type>::value, "Character type of basic_string must not be an array"); 829 static_assert(is_standard_layout<value_type>::value, "Character type of basic_string must be standard-layout"); 830 static_assert(is_trivial<value_type>::value, "Character type of basic_string must be trivial"); 831 static_assert(is_same<_CharT, typename traits_type::char_type>::value, 832 "traits_type::char_type must be the same type as CharT"); 833 static_assert(is_same<typename allocator_type::value_type, value_type>::value, 834 "Allocator::value_type must be same type as value_type"); 835 static_assert(__check_valid_allocator<allocator_type>::value, ""); 836 837#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 838 // Users might provide custom allocators, and prior to C++20 we have no existing way to detect whether the allocator's 839 // pointer type is contiguous (though it has to be by the Standard). Using the wrapper type ensures the iterator is 840 // considered contiguous. 841 typedef __bounded_iter<__wrap_iter<pointer> > iterator; 842 typedef __bounded_iter<__wrap_iter<const_pointer> > const_iterator; 843#else 844 typedef __wrap_iter<pointer> iterator; 845 typedef __wrap_iter<const_pointer> const_iterator; 846#endif 847 typedef std::reverse_iterator<iterator> reverse_iterator; 848 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 849 850private: 851 static_assert(CHAR_BIT == 8, "This implementation assumes that one byte contains 8 bits"); 852 853#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 854 855 struct __long { 856 pointer __data_; 857 size_type __size_; 858 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 859 size_type __is_long_ : 1; 860 }; 861 862 enum { __min_cap = (sizeof(__long) - 1) / sizeof(value_type) > 2 ? (sizeof(__long) - 1) / sizeof(value_type) : 2 }; 863 864 struct __short { 865 value_type __data_[__min_cap]; 866 _LIBCPP_NO_UNIQUE_ADDRESS __padding<sizeof(value_type) - 1> __padding_; 867 unsigned char __size_ : 7; 868 unsigned char __is_long_ : 1; 869 }; 870 871 // The __endian_factor is required because the field we use to store the size 872 // has one fewer bit than it would if it were not a bitfield. 873 // 874 // If the LSB is used to store the short-flag in the short string representation, 875 // we have to multiply the size by two when it is stored and divide it by two when 876 // it is loaded to make sure that we always store an even number. In the long string 877 // representation, we can ignore this because we can assume that we always allocate 878 // an even amount of value_types. 879 // 880 // If the MSB is used for the short-flag, the max_size() is numeric_limits<size_type>::max() / 2. 881 // This does not impact the short string representation, since we never need the MSB 882 // for representing the size of a short string anyway. 883 884# ifdef _LIBCPP_BIG_ENDIAN 885 static const size_type __endian_factor = 2; 886# else 887 static const size_type __endian_factor = 1; 888# endif 889 890#else // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 891 892# ifdef _LIBCPP_BIG_ENDIAN 893 static const size_type __endian_factor = 1; 894# else 895 static const size_type __endian_factor = 2; 896# endif 897 898 // Attribute 'packed' is used to keep the layout compatible with the 899 // previous definition that did not use bit fields. This is because on 900 // some platforms bit fields have a default size rather than the actual 901 // size used, e.g., it is 4 bytes on AIX. See D128285 for details. 902 struct __long { 903 struct _LIBCPP_PACKED { 904 size_type __is_long_ : 1; 905 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 906 }; 907 size_type __size_; 908 pointer __data_; 909 }; 910 911 enum { __min_cap = (sizeof(__long) - 1) / sizeof(value_type) > 2 ? (sizeof(__long) - 1) / sizeof(value_type) : 2 }; 912 913 struct __short { 914 struct _LIBCPP_PACKED { 915 unsigned char __is_long_ : 1; 916 unsigned char __size_ : 7; 917 }; 918 _LIBCPP_NO_UNIQUE_ADDRESS __padding<sizeof(value_type) - 1> __padding_; 919 value_type __data_[__min_cap]; 920 }; 921 922#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 923 924 static_assert(sizeof(__short) == (sizeof(value_type) * (__min_cap + 1)), "__short has an unexpected size."); 925 926 union __rep { 927 __short __s; 928 __long __l; 929 }; 930 931 _LIBCPP_COMPRESSED_PAIR(__rep, __rep_, allocator_type, __alloc_); 932 933 // annotate the string with its size() at scope exit. The string has to be in a valid state at that point. 934 struct __annotate_new_size { 935 basic_string& __str_; 936 937 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __annotate_new_size(basic_string& __str) : __str_(__str) {} 938 939 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void operator()() { __str_.__annotate_new(__str_.size()); } 940 }; 941 942 // Construct a string with the given allocator and enough storage to hold `__size` characters, but 943 // don't initialize the characters. The contents of the string, including the null terminator, must be 944 // initialized separately. 945 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string( 946 __uninitialized_size_tag, size_type __size, const allocator_type& __a) 947 : __alloc_(__a) { 948 if (__size > max_size()) 949 __throw_length_error(); 950 if (__fits_in_sso(__size)) { 951 __rep_ = __rep(); 952 __set_short_size(__size); 953 } else { 954 auto __capacity = __recommend(__size) + 1; 955 auto __allocation = __alloc_traits::allocate(__alloc_, __capacity); 956 __begin_lifetime(__allocation, __capacity); 957 __set_long_cap(__capacity); 958 __set_long_pointer(__allocation); 959 __set_long_size(__size); 960 } 961 __annotate_new(__size); 962 } 963 964 template <class _Iter, class _Sent> 965 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 966 basic_string(__init_with_sentinel_tag, _Iter __first, _Sent __last, const allocator_type& __a) 967 : __alloc_(__a) { 968 __init_with_sentinel(std::move(__first), std::move(__last)); 969 } 970 971 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator __make_iterator(pointer __p) { 972#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 973 // Bound the iterator according to the size (and not the capacity, unlike vector). 974 // 975 // By the Standard, string iterators are generally not guaranteed to stay valid when the container is modified, 976 // regardless of whether reallocation occurs. This allows us to check for out-of-bounds accesses using logical size, 977 // a stricter check, since correct code can never rely on being able to access newly-added elements via an existing 978 // iterator. 979 return std::__make_bounded_iter( 980 std::__wrap_iter<pointer>(__p), 981 std::__wrap_iter<pointer>(__get_pointer()), 982 std::__wrap_iter<pointer>(__get_pointer() + size())); 983#else 984 return iterator(__p); 985#endif // _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 986 } 987 988 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator __make_const_iterator(const_pointer __p) const { 989#ifdef _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 990 // Bound the iterator according to the size (and not the capacity, unlike vector). 991 return std::__make_bounded_iter( 992 std::__wrap_iter<const_pointer>(__p), 993 std::__wrap_iter<const_pointer>(__get_pointer()), 994 std::__wrap_iter<const_pointer>(__get_pointer() + size())); 995#else 996 return const_iterator(__p); 997#endif // _LIBCPP_ABI_BOUNDED_ITERATORS_IN_STRING 998 } 999 1000public: 1001 _LIBCPP_TEMPLATE_DATA_VIS static const size_type npos = -1; 1002 1003 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string() 1004 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value) 1005 : __rep_() { 1006 __annotate_new(0); 1007 } 1008 1009 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const allocator_type& __a) 1010#if _LIBCPP_STD_VER <= 14 1011 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value) 1012#else 1013 _NOEXCEPT 1014#endif 1015 : __rep_(), __alloc_(__a) { 1016 __annotate_new(0); 1017 } 1018 1019 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string(const basic_string& __str) 1020 : __alloc_(__alloc_traits::select_on_container_copy_construction(__str.__alloc_)) { 1021 if (!__str.__is_long()) { 1022 __rep_ = __str.__rep_; 1023 __annotate_new(__get_short_size()); 1024 } else 1025 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1026 } 1027 1028 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 1029 basic_string(const basic_string& __str, const allocator_type& __a) 1030 : __alloc_(__a) { 1031 if (!__str.__is_long()) { 1032 __rep_ = __str.__rep_; 1033 __annotate_new(__get_short_size()); 1034 } else 1035 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1036 } 1037 1038#ifndef _LIBCPP_CXX03_LANG 1039 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str) 1040# if _LIBCPP_STD_VER <= 14 1041 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value) 1042# else 1043 _NOEXCEPT 1044# endif 1045 // Turning off ASan instrumentation for variable initialization with _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 1046 // does not work consistently during initialization of __r_, so we instead unpoison __str's memory manually first. 1047 // __str's memory needs to be unpoisoned only in the case where it's a short string. 1048 : __rep_([](basic_string& __s) -> decltype(__s.__rep_)&& { 1049 if (!__s.__is_long()) 1050 __s.__annotate_delete(); 1051 return std::move(__s.__rep_); 1052 }(__str)), 1053 __alloc_(std::move(__str.__alloc_)) { 1054 __str.__rep_ = __rep(); 1055 __str.__annotate_new(0); 1056 if (!__is_long()) 1057 __annotate_new(size()); 1058 } 1059 1060 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str, const allocator_type& __a) 1061 : __alloc_(__a) { 1062 if (__str.__is_long() && __a != __str.__alloc_) // copy, not move 1063 __init(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1064 else { 1065 if (__libcpp_is_constant_evaluated()) 1066 __rep_ = __rep(); 1067 if (!__str.__is_long()) 1068 __str.__annotate_delete(); 1069 __rep_ = __str.__rep_; 1070 __str.__rep_ = __rep(); 1071 __str.__annotate_new(0); 1072 if (!__is_long() && this != std::addressof(__str)) 1073 __annotate_new(size()); 1074 } 1075 } 1076#endif // _LIBCPP_CXX03_LANG 1077 1078 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 1079 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s) { 1080 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "basic_string(const char*) detected nullptr"); 1081 __init(__s, traits_type::length(__s)); 1082 } 1083 1084 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 1085 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, const _Allocator& __a) 1086 : __alloc_(__a) { 1087 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); 1088 __init(__s, traits_type::length(__s)); 1089 } 1090 1091#if _LIBCPP_STD_VER >= 23 1092 basic_string(nullptr_t) = delete; 1093#endif 1094 1095 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, size_type __n) { 1096 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); 1097 __init(__s, __n); 1098 } 1099 1100 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1101 basic_string(const _CharT* __s, size_type __n, const _Allocator& __a) 1102 : __alloc_(__a) { 1103 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "basic_string(const char*, n, allocator) detected nullptr"); 1104 __init(__s, __n); 1105 } 1106 1107 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c) { __init(__n, __c); } 1108 1109#if _LIBCPP_STD_VER >= 23 1110 _LIBCPP_HIDE_FROM_ABI constexpr basic_string( 1111 basic_string&& __str, size_type __pos, const _Allocator& __alloc = _Allocator()) 1112 : basic_string(std::move(__str), __pos, npos, __alloc) {} 1113 1114 _LIBCPP_HIDE_FROM_ABI constexpr basic_string( 1115 basic_string&& __str, size_type __pos, size_type __n, const _Allocator& __alloc = _Allocator()) 1116 : __alloc_(__alloc) { 1117 if (__pos > __str.size()) 1118 __throw_out_of_range(); 1119 1120 auto __len = std::min<size_type>(__n, __str.size() - __pos); 1121 if (__alloc_traits::is_always_equal::value || __alloc == __str.__alloc_) { 1122 __move_assign(std::move(__str), __pos, __len); 1123 } else { 1124 // Perform a copy because the allocators are not compatible. 1125 __init(__str.data() + __pos, __len); 1126 } 1127 } 1128#endif 1129 1130 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 1131 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c, const _Allocator& __a) 1132 : __alloc_(__a) { 1133 __init(__n, __c); 1134 } 1135 1136 _LIBCPP_CONSTEXPR_SINCE_CXX20 1137 basic_string(const basic_string& __str, size_type __pos, size_type __n, const _Allocator& __a = _Allocator()) 1138 : __alloc_(__a) { 1139 size_type __str_sz = __str.size(); 1140 if (__pos > __str_sz) 1141 __throw_out_of_range(); 1142 __init(__str.data() + __pos, std::min(__n, __str_sz - __pos)); 1143 } 1144 1145 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1146 basic_string(const basic_string& __str, size_type __pos, const _Allocator& __a = _Allocator()) 1147 : __alloc_(__a) { 1148 size_type __str_sz = __str.size(); 1149 if (__pos > __str_sz) 1150 __throw_out_of_range(); 1151 __init(__str.data() + __pos, __str_sz - __pos); 1152 } 1153 1154 template <class _Tp, 1155 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1156 !__is_same_uncvref<_Tp, basic_string>::value, 1157 int> = 0> 1158 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1159 basic_string(const _Tp& __t, size_type __pos, size_type __n, const allocator_type& __a = allocator_type()) 1160 : __alloc_(__a) { 1161 __self_view __sv0 = __t; 1162 __self_view __sv = __sv0.substr(__pos, __n); 1163 __init(__sv.data(), __sv.size()); 1164 } 1165 1166 template <class _Tp, 1167 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1168 !__is_same_uncvref<_Tp, basic_string>::value, 1169 int> = 0> 1170 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1171 _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const _Tp& __t) { 1172 __self_view __sv = __t; 1173 __init(__sv.data(), __sv.size()); 1174 } 1175 1176 template <class _Tp, 1177 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1178 !__is_same_uncvref<_Tp, basic_string>::value, 1179 int> = 0> 1180 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1181 _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const _Tp& __t, const allocator_type& __a) 1182 : __alloc_(__a) { 1183 __self_view __sv = __t; 1184 __init(__sv.data(), __sv.size()); 1185 } 1186 1187 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1188 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(_InputIterator __first, _InputIterator __last) { 1189 __init(__first, __last); 1190 } 1191 1192 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1193 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1194 basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a) 1195 : __alloc_(__a) { 1196 __init(__first, __last); 1197 } 1198 1199#if _LIBCPP_STD_VER >= 23 1200 template <_ContainerCompatibleRange<_CharT> _Range> 1201 _LIBCPP_HIDE_FROM_ABI constexpr basic_string( 1202 from_range_t, _Range&& __range, const allocator_type& __a = allocator_type()) 1203 : __alloc_(__a) { 1204 if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { 1205 __init_with_size(ranges::begin(__range), ranges::end(__range), ranges::distance(__range)); 1206 } else { 1207 __init_with_sentinel(ranges::begin(__range), ranges::end(__range)); 1208 } 1209 } 1210#endif 1211 1212#ifndef _LIBCPP_CXX03_LANG 1213 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il) { 1214 __init(__il.begin(), __il.end()); 1215 } 1216 1217 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il, const _Allocator& __a) 1218 : __alloc_(__a) { 1219 __init(__il.begin(), __il.end()); 1220 } 1221#endif // _LIBCPP_CXX03_LANG 1222 1223 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 ~basic_string() { 1224 __annotate_delete(); 1225 if (__is_long()) 1226 __alloc_traits::deallocate(__alloc_, __get_long_pointer(), __get_long_cap()); 1227 } 1228 1229 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 operator __self_view() const _NOEXCEPT { 1230 return __self_view(typename __self_view::__assume_valid(), data(), size()); 1231 } 1232 1233 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string& 1234 operator=(const basic_string& __str); 1235 1236 template <class _Tp, 1237 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1238 !__is_same_uncvref<_Tp, basic_string>::value, 1239 int> = 0> 1240 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const _Tp& __t) { 1241 __self_view __sv = __t; 1242 return assign(__sv); 1243 } 1244 1245#ifndef _LIBCPP_CXX03_LANG 1246 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1247 operator=(basic_string&& __str) noexcept(__noexcept_move_assign_container<_Allocator, __alloc_traits>::value) { 1248 __move_assign(__str, integral_constant<bool, __alloc_traits::propagate_on_container_move_assignment::value>()); 1249 return *this; 1250 } 1251 1252 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(initializer_list<value_type> __il) { 1253 return assign(__il.begin(), __il.size()); 1254 } 1255#endif 1256 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const value_type* __s) { 1257 return assign(__s); 1258 } 1259#if _LIBCPP_STD_VER >= 23 1260 basic_string& operator=(nullptr_t) = delete; 1261#endif 1262 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(value_type __c); 1263 1264 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator begin() _NOEXCEPT { 1265 return __make_iterator(__get_pointer()); 1266 } 1267 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator begin() const _NOEXCEPT { 1268 return __make_const_iterator(__get_pointer()); 1269 } 1270 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator end() _NOEXCEPT { 1271 return __make_iterator(__get_pointer() + size()); 1272 } 1273 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator end() const _NOEXCEPT { 1274 return __make_const_iterator(__get_pointer() + size()); 1275 } 1276 1277 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reverse_iterator rbegin() _NOEXCEPT { 1278 return reverse_iterator(end()); 1279 } 1280 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator rbegin() const _NOEXCEPT { 1281 return const_reverse_iterator(end()); 1282 } 1283 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reverse_iterator rend() _NOEXCEPT { 1284 return reverse_iterator(begin()); 1285 } 1286 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator rend() const _NOEXCEPT { 1287 return const_reverse_iterator(begin()); 1288 } 1289 1290 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator cbegin() const _NOEXCEPT { return begin(); } 1291 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator cend() const _NOEXCEPT { return end(); } 1292 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator crbegin() const _NOEXCEPT { 1293 return rbegin(); 1294 } 1295 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reverse_iterator crend() const _NOEXCEPT { return rend(); } 1296 1297 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type size() const _NOEXCEPT { 1298 return __is_long() ? __get_long_size() : __get_short_size(); 1299 } 1300 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type length() const _NOEXCEPT { return size(); } 1301 1302 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type max_size() const _NOEXCEPT { 1303 size_type __m = __alloc_traits::max_size(__alloc_); 1304 if (__m <= std::numeric_limits<size_type>::max() / 2) { 1305 return __m - __alignment; 1306 } else { 1307 bool __uses_lsb = __endian_factor == 2; 1308 return __uses_lsb ? __m - __alignment : (__m / 2) - __alignment; 1309 } 1310 } 1311 1312 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type capacity() const _NOEXCEPT { 1313 return (__is_long() ? __get_long_cap() : static_cast<size_type>(__min_cap)) - 1; 1314 } 1315 1316 _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n, value_type __c); 1317 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n) { resize(__n, value_type()); } 1318 1319 _LIBCPP_CONSTEXPR_SINCE_CXX20 void reserve(size_type __requested_capacity); 1320 1321#if _LIBCPP_STD_VER >= 23 1322 template <class _Op> 1323 _LIBCPP_HIDE_FROM_ABI constexpr void resize_and_overwrite(size_type __n, _Op __op) { 1324 __resize_default_init(__n); 1325 __erase_to_end(std::move(__op)(data(), _LIBCPP_AUTO_CAST(__n))); 1326 } 1327#endif 1328 1329 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __resize_default_init(size_type __n); 1330 1331#if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRING_RESERVE) 1332 _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_HIDE_FROM_ABI void reserve() _NOEXCEPT { shrink_to_fit(); } 1333#endif 1334 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void shrink_to_fit() _NOEXCEPT; 1335 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void clear() _NOEXCEPT; 1336 1337 [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool empty() const _NOEXCEPT { 1338 return size() == 0; 1339 } 1340 1341 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference operator[](size_type __pos) const _NOEXCEPT { 1342 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); 1343 if (__builtin_constant_p(__pos) && !__fits_in_sso(__pos)) { 1344 return *(__get_long_pointer() + __pos); 1345 } 1346 return *(data() + __pos); 1347 } 1348 1349 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator[](size_type __pos) _NOEXCEPT { 1350 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); 1351 if (__builtin_constant_p(__pos) && !__fits_in_sso(__pos)) { 1352 return *(__get_long_pointer() + __pos); 1353 } 1354 return *(__get_pointer() + __pos); 1355 } 1356 1357 _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference at(size_type __n) const; 1358 _LIBCPP_CONSTEXPR_SINCE_CXX20 reference at(size_type __n); 1359 1360 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const basic_string& __str) { 1361 return append(__str); 1362 } 1363 1364 template <class _Tp, 1365 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1366 !__is_same_uncvref<_Tp, basic_string >::value, 1367 int> = 0> 1368 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1369 operator+=(const _Tp& __t) { 1370 __self_view __sv = __t; 1371 return append(__sv); 1372 } 1373 1374 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const value_type* __s) { 1375 return append(__s); 1376 } 1377 1378 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(value_type __c) { 1379 push_back(__c); 1380 return *this; 1381 } 1382 1383#ifndef _LIBCPP_CXX03_LANG 1384 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(initializer_list<value_type> __il) { 1385 return append(__il); 1386 } 1387#endif // _LIBCPP_CXX03_LANG 1388 1389 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str) { 1390 return append(__str.data(), __str.size()); 1391 } 1392 1393 template <class _Tp, 1394 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1395 !__is_same_uncvref<_Tp, basic_string>::value, 1396 int> = 0> 1397 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1398 append(const _Tp& __t) { 1399 __self_view __sv = __t; 1400 return append(__sv.data(), __sv.size()); 1401 } 1402 1403 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str, size_type __pos, size_type __n = npos); 1404 1405 template <class _Tp, 1406 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1407 !__is_same_uncvref<_Tp, basic_string>::value, 1408 int> = 0> 1409 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1410 1411 basic_string& 1412 append(const _Tp& __t, size_type __pos, size_type __n = npos); 1413 1414 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s, size_type __n); 1415 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s); 1416 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(size_type __n, value_type __c); 1417 1418 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __append_default_init(size_type __n); 1419 1420 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1421 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1422 append(_InputIterator __first, _InputIterator __last) { 1423 const basic_string __temp(__first, __last, __alloc_); 1424 append(__temp.data(), __temp.size()); 1425 return *this; 1426 } 1427 1428 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1429 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1430 append(_ForwardIterator __first, _ForwardIterator __last); 1431 1432#if _LIBCPP_STD_VER >= 23 1433 template <_ContainerCompatibleRange<_CharT> _Range> 1434 _LIBCPP_HIDE_FROM_ABI constexpr basic_string& append_range(_Range&& __range) { 1435 insert_range(end(), std::forward<_Range>(__range)); 1436 return *this; 1437 } 1438#endif 1439 1440#ifndef _LIBCPP_CXX03_LANG 1441 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(initializer_list<value_type> __il) { 1442 return append(__il.begin(), __il.size()); 1443 } 1444#endif // _LIBCPP_CXX03_LANG 1445 1446 _LIBCPP_CONSTEXPR_SINCE_CXX20 void push_back(value_type __c); 1447 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void pop_back(); 1448 1449 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference front() _NOEXCEPT { 1450 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); 1451 return *__get_pointer(); 1452 } 1453 1454 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference front() const _NOEXCEPT { 1455 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); 1456 return *data(); 1457 } 1458 1459 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference back() _NOEXCEPT { 1460 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); 1461 return *(__get_pointer() + size() - 1); 1462 } 1463 1464 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference back() const _NOEXCEPT { 1465 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); 1466 return *(data() + size() - 1); 1467 } 1468 1469 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1470 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1471 assign(const _Tp& __t) { 1472 __self_view __sv = __t; 1473 return assign(__sv.data(), __sv.size()); 1474 } 1475 1476#if _LIBCPP_STD_VER >= 20 1477 _LIBCPP_HIDE_FROM_ABI constexpr void __move_assign(basic_string&& __str, size_type __pos, size_type __len) { 1478 // Pilfer the allocation from __str. 1479 _LIBCPP_ASSERT_INTERNAL(__alloc_ == __str.__alloc_, "__move_assign called with wrong allocator"); 1480 size_type __old_sz = __str.size(); 1481 if (!__str.__is_long()) 1482 __str.__annotate_delete(); 1483 __rep_ = __str.__rep_; 1484 __str.__rep_ = __rep(); 1485 __str.__annotate_new(0); 1486 1487 _Traits::move(data(), data() + __pos, __len); 1488 __set_size(__len); 1489 _Traits::assign(data()[__len], value_type()); 1490 1491 if (!__is_long()) { 1492 __annotate_new(__len); 1493 } else if (__old_sz > __len) { 1494 __annotate_shrink(__old_sz); 1495 } 1496 } 1497#endif 1498 1499 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const basic_string& __str) { 1500 return *this = __str; 1501 } 1502#ifndef _LIBCPP_CXX03_LANG 1503 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1504 assign(basic_string&& __str) noexcept(__noexcept_move_assign_container<_Allocator, __alloc_traits>::value) { 1505 *this = std::move(__str); 1506 return *this; 1507 } 1508#endif 1509 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n = npos); 1510 1511 template <class _Tp, 1512 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1513 !__is_same_uncvref<_Tp, basic_string>::value, 1514 int> = 0> 1515 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1516 assign(const _Tp& __t, size_type __pos, size_type __n = npos); 1517 1518 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s, size_type __n); 1519 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s); 1520 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(size_type __n, value_type __c); 1521 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1522 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1523 assign(_InputIterator __first, _InputIterator __last); 1524 1525 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1526 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1527 assign(_ForwardIterator __first, _ForwardIterator __last); 1528 1529#if _LIBCPP_STD_VER >= 23 1530 template <_ContainerCompatibleRange<_CharT> _Range> 1531 _LIBCPP_HIDE_FROM_ABI constexpr basic_string& assign_range(_Range&& __range) { 1532 if constexpr (__string_is_trivial_iterator<ranges::iterator_t<_Range>>::value && 1533 (ranges::forward_range<_Range> || ranges::sized_range<_Range>)) { 1534 size_type __n = static_cast<size_type>(ranges::distance(__range)); 1535 __assign_trivial(ranges::begin(__range), ranges::end(__range), __n); 1536 1537 } else { 1538 __assign_with_sentinel(ranges::begin(__range), ranges::end(__range)); 1539 } 1540 1541 return *this; 1542 } 1543#endif 1544 1545#ifndef _LIBCPP_CXX03_LANG 1546 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(initializer_list<value_type> __il) { 1547 return assign(__il.begin(), __il.size()); 1548 } 1549#endif // _LIBCPP_CXX03_LANG 1550 1551 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1552 insert(size_type __pos1, const basic_string& __str) { 1553 return insert(__pos1, __str.data(), __str.size()); 1554 } 1555 1556 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1557 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1558 insert(size_type __pos1, const _Tp& __t) { 1559 __self_view __sv = __t; 1560 return insert(__pos1, __sv.data(), __sv.size()); 1561 } 1562 1563 template <class _Tp, 1564 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1565 !__is_same_uncvref<_Tp, basic_string>::value, 1566 int> = 0> 1567 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1568 insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n = npos); 1569 1570 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1571 insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n = npos); 1572 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); 1573 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s); 1574 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, size_type __n, value_type __c); 1575 _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator insert(const_iterator __pos, value_type __c); 1576 1577#if _LIBCPP_STD_VER >= 23 1578 template <_ContainerCompatibleRange<_CharT> _Range> 1579 _LIBCPP_HIDE_FROM_ABI constexpr iterator insert_range(const_iterator __position, _Range&& __range) { 1580 if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { 1581 auto __n = static_cast<size_type>(ranges::distance(__range)); 1582 return __insert_with_size(__position, ranges::begin(__range), ranges::end(__range), __n); 1583 1584 } else { 1585 basic_string __temp(from_range, std::forward<_Range>(__range), __alloc_); 1586 return insert(__position, __temp.data(), __temp.data() + __temp.size()); 1587 } 1588 } 1589#endif 1590 1591 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1592 insert(const_iterator __pos, size_type __n, value_type __c) { 1593 difference_type __p = __pos - begin(); 1594 insert(static_cast<size_type>(__p), __n, __c); 1595 return begin() + __p; 1596 } 1597 1598 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1599 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1600 insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); 1601 1602 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1603 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1604 insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); 1605 1606#ifndef _LIBCPP_CXX03_LANG 1607 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1608 insert(const_iterator __pos, initializer_list<value_type> __il) { 1609 return insert(__pos, __il.begin(), __il.end()); 1610 } 1611#endif // _LIBCPP_CXX03_LANG 1612 1613 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& erase(size_type __pos = 0, size_type __n = npos); 1614 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator erase(const_iterator __pos); 1615 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator erase(const_iterator __first, const_iterator __last); 1616 1617 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1618 replace(size_type __pos1, size_type __n1, const basic_string& __str) { 1619 return replace(__pos1, __n1, __str.data(), __str.size()); 1620 } 1621 1622 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1623 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1624 replace(size_type __pos1, size_type __n1, const _Tp& __t) { 1625 __self_view __sv = __t; 1626 return replace(__pos1, __n1, __sv.data(), __sv.size()); 1627 } 1628 1629 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1630 replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2 = npos); 1631 1632 template <class _Tp, 1633 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1634 !__is_same_uncvref<_Tp, basic_string>::value, 1635 int> = 0> 1636 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1637 replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos); 1638 1639 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1640 replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); 1641 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); 1642 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); 1643 1644 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1645 replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) { 1646 return replace( 1647 static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __str.data(), __str.size()); 1648 } 1649 1650 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1651 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1652 replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { 1653 __self_view __sv = __t; 1654 return replace(__i1 - begin(), __i2 - __i1, __sv); 1655 } 1656 1657 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1658 replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) { 1659 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); 1660 } 1661 1662 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1663 replace(const_iterator __i1, const_iterator __i2, const value_type* __s) { 1664 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); 1665 } 1666 1667 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1668 replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) { 1669 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); 1670 } 1671 1672 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1673 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1674 replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); 1675 1676#if _LIBCPP_STD_VER >= 23 1677 template <_ContainerCompatibleRange<_CharT> _Range> 1678 _LIBCPP_HIDE_FROM_ABI constexpr basic_string& 1679 replace_with_range(const_iterator __i1, const_iterator __i2, _Range&& __range) { 1680 basic_string __temp(from_range, std::forward<_Range>(__range), __alloc_); 1681 return replace(__i1, __i2, __temp); 1682 } 1683#endif 1684 1685#ifndef _LIBCPP_CXX03_LANG 1686 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1687 replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) { 1688 return replace(__i1, __i2, __il.begin(), __il.end()); 1689 } 1690#endif // _LIBCPP_CXX03_LANG 1691 1692 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; 1693 1694#if _LIBCPP_STD_VER <= 20 1695 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string 1696 substr(size_type __pos = 0, size_type __n = npos) const { 1697 return basic_string(*this, __pos, __n); 1698 } 1699#else 1700 _LIBCPP_HIDE_FROM_ABI constexpr basic_string substr(size_type __pos = 0, size_type __n = npos) const& { 1701 return basic_string(*this, __pos, __n); 1702 } 1703 1704 _LIBCPP_HIDE_FROM_ABI constexpr basic_string substr(size_type __pos = 0, size_type __n = npos) && { 1705 return basic_string(std::move(*this), __pos, __n); 1706 } 1707#endif 1708 1709 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void swap(basic_string& __str) 1710#if _LIBCPP_STD_VER >= 14 1711 _NOEXCEPT; 1712#else 1713 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || __is_nothrow_swappable_v<allocator_type>); 1714#endif 1715 1716 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const value_type* c_str() const _NOEXCEPT { return data(); } 1717 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const value_type* data() const _NOEXCEPT { 1718 return std::__to_address(__get_pointer()); 1719 } 1720#if _LIBCPP_STD_VER >= 17 1721 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 value_type* data() _NOEXCEPT { 1722 return std::__to_address(__get_pointer()); 1723 } 1724#endif 1725 1726 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 allocator_type get_allocator() const _NOEXCEPT { 1727 return __alloc_; 1728 } 1729 1730 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1731 find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1732 1733 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1734 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1735 find(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1736 1737 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1738 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1739 find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1740 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1741 1742 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1743 rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1744 1745 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1746 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1747 rfind(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1748 1749 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1750 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1751 rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1752 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1753 1754 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1755 find_first_of(const basic_string& __str, size_type __pos = 0) 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_first_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1760 1761 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1762 find_first_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_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1765 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1766 find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1767 1768 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1769 find_last_of(const basic_string& __str, size_type __pos = npos) 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_last_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1774 1775 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1776 find_last_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_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1779 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1780 find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1781 1782 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1783 find_first_not_of(const basic_string& __str, size_type __pos = 0) 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_first_not_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1788 1789 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1790 find_first_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_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1793 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1794 find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1795 1796 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1797 find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1798 1799 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1800 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1801 find_last_not_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1802 1803 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1804 find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1805 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1806 find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1807 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1808 find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1809 1810 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(const basic_string& __str) const _NOEXCEPT; 1811 1812 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1813 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1814 compare(const _Tp& __t) const _NOEXCEPT; 1815 1816 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1817 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1818 compare(size_type __pos1, size_type __n1, const _Tp& __t) const; 1819 1820 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1821 compare(size_type __pos1, size_type __n1, const basic_string& __str) const; 1822 _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1823 compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2 = npos) const; 1824 1825 template <class _Tp, 1826 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1827 !__is_same_uncvref<_Tp, basic_string>::value, 1828 int> = 0> 1829 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1830 compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos) const; 1831 1832 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(const value_type* __s) const _NOEXCEPT; 1833 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; 1834 _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1835 compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; 1836 1837#if _LIBCPP_STD_VER >= 20 1838 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(__self_view __sv) const noexcept { 1839 return __self_view(typename __self_view::__assume_valid(), data(), size()).starts_with(__sv); 1840 } 1841 1842 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(value_type __c) const noexcept { 1843 return !empty() && _Traits::eq(front(), __c); 1844 } 1845 1846 constexpr _LIBCPP_HIDE_FROM_ABI bool starts_with(const value_type* __s) const noexcept { 1847 return starts_with(__self_view(__s)); 1848 } 1849 1850 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(__self_view __sv) const noexcept { 1851 return __self_view(typename __self_view::__assume_valid(), data(), size()).ends_with(__sv); 1852 } 1853 1854 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(value_type __c) const noexcept { 1855 return !empty() && _Traits::eq(back(), __c); 1856 } 1857 1858 constexpr _LIBCPP_HIDE_FROM_ABI bool ends_with(const value_type* __s) const noexcept { 1859 return ends_with(__self_view(__s)); 1860 } 1861#endif 1862 1863#if _LIBCPP_STD_VER >= 23 1864 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(__self_view __sv) const noexcept { 1865 return __self_view(typename __self_view::__assume_valid(), data(), size()).contains(__sv); 1866 } 1867 1868 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(value_type __c) const noexcept { 1869 return __self_view(typename __self_view::__assume_valid(), data(), size()).contains(__c); 1870 } 1871 1872 constexpr _LIBCPP_HIDE_FROM_ABI bool contains(const value_type* __s) const { 1873 return __self_view(typename __self_view::__assume_valid(), data(), size()).contains(__s); 1874 } 1875#endif 1876 1877 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __invariants() const; 1878 1879 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __clear_and_shrink() _NOEXCEPT; 1880 1881private: 1882 template <class _Alloc> 1883 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool friend 1884 operator==(const basic_string<char, char_traits<char>, _Alloc>& __lhs, 1885 const basic_string<char, char_traits<char>, _Alloc>& __rhs) _NOEXCEPT; 1886 1887 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __shrink_or_extend(size_type __target_capacity); 1888 1889 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS bool 1890 __is_long() const _NOEXCEPT { 1891 if (__libcpp_is_constant_evaluated() && __builtin_constant_p(__rep_.__l.__is_long_)) { 1892 return __rep_.__l.__is_long_; 1893 } 1894 return __rep_.__s.__is_long_; 1895 } 1896 1897 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __begin_lifetime(pointer __begin, size_type __n) { 1898#if _LIBCPP_STD_VER >= 20 1899 if (__libcpp_is_constant_evaluated()) { 1900 for (size_type __i = 0; __i != __n; ++__i) 1901 std::construct_at(std::addressof(__begin[__i])); 1902 } 1903#else 1904 (void)__begin; 1905 (void)__n; 1906#endif // _LIBCPP_STD_VER >= 20 1907 } 1908 1909 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) { return __sz < __min_cap; } 1910 1911 template <class _Iterator, class _Sentinel> 1912 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void 1913 __assign_trivial(_Iterator __first, _Sentinel __last, size_type __n); 1914 1915 template <class _Iterator, class _Sentinel> 1916 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __assign_with_sentinel(_Iterator __first, _Sentinel __last); 1917 1918 // Copy [__first, __last) into [__dest, __dest + (__last - __first)). Assumes that the ranges don't overlap. 1919 template <class _ForwardIter, class _Sent> 1920 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 static value_type* 1921 __copy_non_overlapping_range(_ForwardIter __first, _Sent __last, value_type* __dest) { 1922#ifndef _LIBCPP_CXX03_LANG 1923 if constexpr (__libcpp_is_contiguous_iterator<_ForwardIter>::value && 1924 is_same<value_type, __iter_value_type<_ForwardIter>>::value && is_same<_ForwardIter, _Sent>::value) { 1925 _LIBCPP_ASSERT_INTERNAL( 1926 !std::__is_overlapping_range(std::__to_address(__first), std::__to_address(__last), __dest), 1927 "__copy_non_overlapping_range called with an overlapping range!"); 1928 traits_type::copy(__dest, std::__to_address(__first), __last - __first); 1929 return __dest + (__last - __first); 1930 } 1931#endif 1932 1933 for (; __first != __last; ++__first) 1934 traits_type::assign(*__dest++, *__first); 1935 return __dest; 1936 } 1937 1938 template <class _ForwardIterator, class _Sentinel> 1939 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 iterator 1940 __insert_from_safe_copy(size_type __n, size_type __ip, _ForwardIterator __first, _Sentinel __last) { 1941 size_type __sz = size(); 1942 size_type __cap = capacity(); 1943 value_type* __p; 1944 if (__cap - __sz >= __n) { 1945 __annotate_increase(__n); 1946 __p = std::__to_address(__get_pointer()); 1947 size_type __n_move = __sz - __ip; 1948 if (__n_move != 0) 1949 traits_type::move(__p + __ip + __n, __p + __ip, __n_move); 1950 } else { 1951 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); 1952 __p = std::__to_address(__get_long_pointer()); 1953 } 1954 __sz += __n; 1955 __set_size(__sz); 1956 traits_type::assign(__p[__sz], value_type()); 1957 __copy_non_overlapping_range(__first, __last, __p + __ip); 1958 1959 return begin() + __ip; 1960 } 1961 1962 template <class _Iterator, class _Sentinel> 1963 _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1964 __insert_with_size(const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n); 1965 1966 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS void 1967 __set_short_size(size_type __s) _NOEXCEPT { 1968 _LIBCPP_ASSERT_INTERNAL(__s < __min_cap, "__s should never be greater than or equal to the short string capacity"); 1969 __rep_.__s.__size_ = __s; 1970 __rep_.__s.__is_long_ = false; 1971 } 1972 1973 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS size_type 1974 __get_short_size() const _NOEXCEPT { 1975 _LIBCPP_ASSERT_INTERNAL(!__rep_.__s.__is_long_, "String has to be short when trying to get the short size"); 1976 return __rep_.__s.__size_; 1977 } 1978 1979 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_long_size(size_type __s) _NOEXCEPT { 1980 __rep_.__l.__size_ = __s; 1981 } 1982 1983 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __get_long_size() const _NOEXCEPT { 1984 _LIBCPP_ASSERT_INTERNAL(__rep_.__l.__is_long_, "String has to be long when trying to get the long size"); 1985 return __rep_.__l.__size_; 1986 } 1987 1988 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_size(size_type __s) _NOEXCEPT { 1989 if (__is_long()) 1990 __set_long_size(__s); 1991 else 1992 __set_short_size(__s); 1993 } 1994 1995 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_long_cap(size_type __s) _NOEXCEPT { 1996 _LIBCPP_ASSERT_INTERNAL(!__fits_in_sso(__s), "Long capacity should always be larger than the SSO"); 1997 __rep_.__l.__cap_ = __s / __endian_factor; 1998 __rep_.__l.__is_long_ = true; 1999 } 2000 2001 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __get_long_cap() const _NOEXCEPT { 2002 _LIBCPP_ASSERT_INTERNAL(__rep_.__l.__is_long_, "String has to be long when trying to get the long capacity"); 2003 return __rep_.__l.__cap_ * __endian_factor; 2004 } 2005 2006 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __set_long_pointer(pointer __p) _NOEXCEPT { 2007 __rep_.__l.__data_ = __p; 2008 } 2009 2010 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pointer __get_long_pointer() _NOEXCEPT { 2011 _LIBCPP_ASSERT_INTERNAL(__rep_.__l.__is_long_, "String has to be long when trying to get the long pointer"); 2012 return _LIBCPP_ASAN_VOLATILE_WRAPPER(__rep_.__l.__data_); 2013 } 2014 2015 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_pointer __get_long_pointer() const _NOEXCEPT { 2016 _LIBCPP_ASSERT_INTERNAL(__rep_.__l.__is_long_, "String has to be long when trying to get the long pointer"); 2017 return _LIBCPP_ASAN_VOLATILE_WRAPPER(__rep_.__l.__data_); 2018 } 2019 2020 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS pointer 2021 __get_short_pointer() _NOEXCEPT { 2022 return _LIBCPP_ASAN_VOLATILE_WRAPPER(pointer_traits<pointer>::pointer_to(__rep_.__s.__data_[0])); 2023 } 2024 2025 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS const_pointer 2026 __get_short_pointer() const _NOEXCEPT { 2027 return _LIBCPP_ASAN_VOLATILE_WRAPPER(pointer_traits<const_pointer>::pointer_to(__rep_.__s.__data_[0])); 2028 } 2029 2030 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pointer __get_pointer() _NOEXCEPT { 2031 return __is_long() ? __get_long_pointer() : __get_short_pointer(); 2032 } 2033 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_pointer __get_pointer() const _NOEXCEPT { 2034 return __is_long() ? __get_long_pointer() : __get_short_pointer(); 2035 } 2036 2037 // The following functions are no-ops outside of AddressSanitizer mode. 2038 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2039 __annotate_contiguous_container(const void* __old_mid, const void* __new_mid) const { 2040 (void)__old_mid; 2041 (void)__new_mid; 2042#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 2043# if defined(__APPLE__) 2044 // TODO: remove after addressing issue #96099 (https://github.com/llvm/llvm-project/issues/96099) 2045 if (!__is_long()) 2046 return; 2047# endif 2048 std::__annotate_contiguous_container<_Allocator>(data(), data() + capacity() + 1, __old_mid, __new_mid); 2049#endif 2050 } 2051 2052 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_new(size_type __current_size) const _NOEXCEPT { 2053 (void)__current_size; 2054#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 2055 if (!__libcpp_is_constant_evaluated()) 2056 __annotate_contiguous_container(data() + capacity() + 1, data() + __current_size + 1); 2057#endif 2058 } 2059 2060 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_delete() const _NOEXCEPT { 2061#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 2062 if (!__libcpp_is_constant_evaluated()) 2063 __annotate_contiguous_container(data() + size() + 1, data() + capacity() + 1); 2064#endif 2065 } 2066 2067 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_increase(size_type __n) const _NOEXCEPT { 2068 (void)__n; 2069#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 2070 if (!__libcpp_is_constant_evaluated()) 2071 __annotate_contiguous_container(data() + size() + 1, data() + size() + 1 + __n); 2072#endif 2073 } 2074 2075 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_shrink(size_type __old_size) const _NOEXCEPT { 2076 (void)__old_size; 2077#if _LIBCPP_HAS_ASAN && _LIBCPP_INSTRUMENTED_WITH_ASAN 2078 if (!__libcpp_is_constant_evaluated()) 2079 __annotate_contiguous_container(data() + __old_size + 1, data() + size() + 1); 2080#endif 2081 } 2082 2083 template <size_type __a> 2084 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __align_it(size_type __s) _NOEXCEPT { 2085 return (__s + (__a - 1)) & ~(__a - 1); 2086 } 2087 enum { __alignment = 8 }; 2088 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type __recommend(size_type __s) _NOEXCEPT { 2089 if (__s < __min_cap) { 2090 return static_cast<size_type>(__min_cap) - 1; 2091 } 2092 const size_type __boundary = sizeof(value_type) < __alignment ? __alignment / sizeof(value_type) : __endian_factor; 2093 size_type __guess = __align_it<__boundary>(__s + 1) - 1; 2094 if (__guess == __min_cap) 2095 __guess += __endian_factor; 2096 2097 _LIBCPP_ASSERT_INTERNAL(__guess >= __s, "recommendation is below the requested size"); 2098 return __guess; 2099 } 2100 2101 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(const value_type* __s, size_type __sz, size_type __reserve); 2102 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(const value_type* __s, size_type __sz); 2103 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(size_type __n, value_type __c); 2104 2105 // Slow path for the (inlined) copy constructor for 'long' strings. 2106 // Always externally instantiated and not inlined. 2107 // Requires that __s is zero terminated. 2108 // The main reason for this function to exist is because for unstable, we 2109 // want to allow inlining of the copy constructor. However, we don't want 2110 // to call the __init() functions as those are marked as inline which may 2111 // result in over-aggressive inlining by the compiler, where our aim is 2112 // to only inline the fast path code directly in the ctor. 2113 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void __init_copy_ctor_external(const value_type* __s, size_type __sz); 2114 2115 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 2116 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_InputIterator __first, _InputIterator __last); 2117 2118 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 2119 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_ForwardIterator __first, _ForwardIterator __last); 2120 2121 template <class _InputIterator, class _Sentinel> 2122 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2123 __init_with_sentinel(_InputIterator __first, _Sentinel __last); 2124 template <class _InputIterator, class _Sentinel> 2125 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2126 __init_with_size(_InputIterator __first, _Sentinel __last, size_type __sz); 2127 2128 _LIBCPP_CONSTEXPR_SINCE_CXX20 2129#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 2130 _LIBCPP_HIDE_FROM_ABI 2131#endif 2132 _LIBCPP_DEPRECATED_("use __grow_by_without_replace") void __grow_by( 2133 size_type __old_cap, 2134 size_type __delta_cap, 2135 size_type __old_sz, 2136 size_type __n_copy, 2137 size_type __n_del, 2138 size_type __n_add = 0); 2139 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void __grow_by_without_replace( 2140 size_type __old_cap, 2141 size_type __delta_cap, 2142 size_type __old_sz, 2143 size_type __n_copy, 2144 size_type __n_del, 2145 size_type __n_add = 0); 2146 _LIBCPP_CONSTEXPR_SINCE_CXX20 void __grow_by_and_replace( 2147 size_type __old_cap, 2148 size_type __delta_cap, 2149 size_type __old_sz, 2150 size_type __n_copy, 2151 size_type __n_del, 2152 size_type __n_add, 2153 const value_type* __p_new_stuff); 2154 2155 // __assign_no_alias is invoked for assignment operations where we 2156 // have proof that the input does not alias the current instance. 2157 // For example, operator=(basic_string) performs a 'self' check. 2158 template <bool __is_short> 2159 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_no_alias(const value_type* __s, size_type __n); 2160 2161 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __erase_to_end(size_type __pos) { 2162 _LIBCPP_ASSERT_INTERNAL(__pos <= capacity(), "Trying to erase at position outside the strings capacity!"); 2163 __null_terminate_at(std::__to_address(__get_pointer()), __pos); 2164 } 2165 2166 // __erase_external_with_move is invoked for erase() invocations where 2167 // `n ~= npos`, likely requiring memory moves on the string data. 2168 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void __erase_external_with_move(size_type __pos, size_type __n); 2169 2170 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __copy_assign_alloc(const basic_string& __str) { 2171 __copy_assign_alloc( 2172 __str, integral_constant<bool, __alloc_traits::propagate_on_container_copy_assignment::value>()); 2173 } 2174 2175 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __copy_assign_alloc(const basic_string& __str, true_type) { 2176 if (__alloc_ == __str.__alloc_) 2177 __alloc_ = __str.__alloc_; 2178 else { 2179 if (!__str.__is_long()) { 2180 __clear_and_shrink(); 2181 __alloc_ = __str.__alloc_; 2182 } else { 2183 __annotate_delete(); 2184 auto __guard = std::__make_scope_guard(__annotate_new_size(*this)); 2185 allocator_type __a = __str.__alloc_; 2186 auto __allocation = std::__allocate_at_least(__a, __str.__get_long_cap()); 2187 __begin_lifetime(__allocation.ptr, __allocation.count); 2188 if (__is_long()) 2189 __alloc_traits::deallocate(__alloc_, __get_long_pointer(), __get_long_cap()); 2190 __alloc_ = std::move(__a); 2191 __set_long_pointer(__allocation.ptr); 2192 __set_long_cap(__allocation.count); 2193 __set_long_size(__str.size()); 2194 } 2195 } 2196 } 2197 2198 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2199 __copy_assign_alloc(const basic_string&, false_type) _NOEXCEPT {} 2200 2201#ifndef _LIBCPP_CXX03_LANG 2202 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2203 __move_assign(basic_string& __str, false_type) noexcept(__alloc_traits::is_always_equal::value); 2204 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS void 2205 __move_assign(basic_string& __str, true_type) 2206# if _LIBCPP_STD_VER >= 17 2207 noexcept; 2208# else 2209 noexcept(is_nothrow_move_assignable<allocator_type>::value); 2210# endif 2211#endif 2212 2213 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __move_assign_alloc(basic_string& __str) 2214 _NOEXCEPT_(!__alloc_traits::propagate_on_container_move_assignment::value || 2215 is_nothrow_move_assignable<allocator_type>::value) { 2216 __move_assign_alloc( 2217 __str, integral_constant<bool, __alloc_traits::propagate_on_container_move_assignment::value>()); 2218 } 2219 2220 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __move_assign_alloc(basic_string& __c, true_type) 2221 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) { 2222 __alloc_ = std::move(__c.__alloc_); 2223 } 2224 2225 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __move_assign_alloc(basic_string&, false_type) _NOEXCEPT {} 2226 2227 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_external(const value_type* __s); 2228 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_external(const value_type* __s, size_type __n); 2229 2230 // Assigns the value in __s, guaranteed to be __n < __min_cap in length. 2231 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_short(const value_type* __s, size_type __n) { 2232 size_type __old_size = size(); 2233 if (__n > __old_size) 2234 __annotate_increase(__n - __old_size); 2235 pointer __p = 2236 __is_long() ? (__set_long_size(__n), __get_long_pointer()) : (__set_short_size(__n), __get_short_pointer()); 2237 traits_type::move(std::__to_address(__p), __s, __n); 2238 traits_type::assign(__p[__n], value_type()); 2239 if (__old_size > __n) 2240 __annotate_shrink(__old_size); 2241 return *this; 2242 } 2243 2244 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 2245 __null_terminate_at(value_type* __p, size_type __newsz) { 2246 size_type __old_size = size(); 2247 if (__newsz > __old_size) 2248 __annotate_increase(__newsz - __old_size); 2249 __set_size(__newsz); 2250 traits_type::assign(__p[__newsz], value_type()); 2251 if (__old_size > __newsz) 2252 __annotate_shrink(__old_size); 2253 return *this; 2254 } 2255 2256 template <class _Tp> 2257 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __addr_in_range(const _Tp& __v) const { 2258 return std::__is_pointer_in_range(data(), data() + size() + 1, std::addressof(__v)); 2259 } 2260 2261 [[__noreturn__]] _LIBCPP_HIDE_FROM_ABI static void __throw_length_error() { 2262 std::__throw_length_error("basic_string"); 2263 } 2264 2265 [[__noreturn__]] _LIBCPP_HIDE_FROM_ABI static void __throw_out_of_range() { 2266 std::__throw_out_of_range("basic_string"); 2267 } 2268 2269 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const basic_string&, const basic_string&); 2270 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const value_type*, const basic_string&); 2271 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(value_type, const basic_string&); 2272 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const basic_string&, const value_type*); 2273 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+ <>(const basic_string&, value_type); 2274#if _LIBCPP_STD_VER >= 26 2275 friend constexpr basic_string operator+ <>(const basic_string&, type_identity_t<__self_view>); 2276 friend constexpr basic_string operator+ <>(type_identity_t<__self_view>, const basic_string&); 2277#endif 2278 2279 template <class _CharT2, class _Traits2, class _Allocator2> 2280 friend inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool 2281 operator==(const basic_string<_CharT2, _Traits2, _Allocator2>&, const _CharT2*) _NOEXCEPT; 2282}; 2283 2284// These declarations must appear before any functions are implicitly used 2285// so that they have the correct visibility specifier. 2286#define _LIBCPP_DECLARE(...) extern template __VA_ARGS__; 2287#ifdef _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 2288_LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 2289# if _LIBCPP_HAS_WIDE_CHARACTERS 2290_LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 2291# endif 2292#else 2293_LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 2294# if _LIBCPP_HAS_WIDE_CHARACTERS 2295_LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 2296# endif 2297#endif 2298#undef _LIBCPP_DECLARE 2299 2300#if _LIBCPP_STD_VER >= 17 2301template <class _InputIterator, 2302 class _CharT = __iter_value_type<_InputIterator>, 2303 class _Allocator = allocator<_CharT>, 2304 class = enable_if_t<__has_input_iterator_category<_InputIterator>::value>, 2305 class = enable_if_t<__is_allocator<_Allocator>::value> > 2306basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator()) 2307 -> basic_string<_CharT, char_traits<_CharT>, _Allocator>; 2308 2309template <class _CharT, 2310 class _Traits, 2311 class _Allocator = allocator<_CharT>, 2312 class = enable_if_t<__is_allocator<_Allocator>::value> > 2313explicit basic_string(basic_string_view<_CharT, _Traits>, 2314 const _Allocator& = _Allocator()) -> basic_string<_CharT, _Traits, _Allocator>; 2315 2316template <class _CharT, 2317 class _Traits, 2318 class _Allocator = allocator<_CharT>, 2319 class = enable_if_t<__is_allocator<_Allocator>::value>, 2320 class _Sz = typename allocator_traits<_Allocator>::size_type > 2321basic_string(basic_string_view<_CharT, _Traits>, _Sz, _Sz, const _Allocator& = _Allocator()) 2322 -> basic_string<_CharT, _Traits, _Allocator>; 2323#endif 2324 2325#if _LIBCPP_STD_VER >= 23 2326template <ranges::input_range _Range, 2327 class _Allocator = allocator<ranges::range_value_t<_Range>>, 2328 class = enable_if_t<__is_allocator<_Allocator>::value> > 2329basic_string(from_range_t, _Range&&, _Allocator = _Allocator()) 2330 -> basic_string<ranges::range_value_t<_Range>, char_traits<ranges::range_value_t<_Range>>, _Allocator>; 2331#endif 2332 2333template <class _CharT, class _Traits, class _Allocator> 2334_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2335basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz, size_type __reserve) { 2336 if (__libcpp_is_constant_evaluated()) 2337 __rep_ = __rep(); 2338 if (__reserve > max_size()) 2339 __throw_length_error(); 2340 pointer __p; 2341 if (__fits_in_sso(__reserve)) { 2342 __set_short_size(__sz); 2343 __p = __get_short_pointer(); 2344 } else { 2345 auto __allocation = std::__allocate_at_least(__alloc_, __recommend(__reserve) + 1); 2346 __p = __allocation.ptr; 2347 __begin_lifetime(__p, __allocation.count); 2348 __set_long_pointer(__p); 2349 __set_long_cap(__allocation.count); 2350 __set_long_size(__sz); 2351 } 2352 traits_type::copy(std::__to_address(__p), __s, __sz); 2353 traits_type::assign(__p[__sz], value_type()); 2354 __annotate_new(__sz); 2355} 2356 2357template <class _CharT, class _Traits, class _Allocator> 2358_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2359basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz) { 2360 if (__libcpp_is_constant_evaluated()) 2361 __rep_ = __rep(); 2362 if (__sz > max_size()) 2363 __throw_length_error(); 2364 pointer __p; 2365 if (__fits_in_sso(__sz)) { 2366 __set_short_size(__sz); 2367 __p = __get_short_pointer(); 2368 } else { 2369 auto __allocation = std::__allocate_at_least(__alloc_, __recommend(__sz) + 1); 2370 __p = __allocation.ptr; 2371 __begin_lifetime(__p, __allocation.count); 2372 __set_long_pointer(__p); 2373 __set_long_cap(__allocation.count); 2374 __set_long_size(__sz); 2375 } 2376 traits_type::copy(std::__to_address(__p), __s, __sz); 2377 traits_type::assign(__p[__sz], value_type()); 2378 __annotate_new(__sz); 2379} 2380 2381template <class _CharT, class _Traits, class _Allocator> 2382_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void 2383basic_string<_CharT, _Traits, _Allocator>::__init_copy_ctor_external(const value_type* __s, size_type __sz) { 2384 if (__libcpp_is_constant_evaluated()) 2385 __rep_ = __rep(); 2386 2387 pointer __p; 2388 if (__fits_in_sso(__sz)) { 2389 __p = __get_short_pointer(); 2390 __set_short_size(__sz); 2391 } else { 2392 if (__sz > max_size()) 2393 __throw_length_error(); 2394 auto __allocation = std::__allocate_at_least(__alloc_, __recommend(__sz) + 1); 2395 __p = __allocation.ptr; 2396 __begin_lifetime(__p, __allocation.count); 2397 __set_long_pointer(__p); 2398 __set_long_cap(__allocation.count); 2399 __set_long_size(__sz); 2400 } 2401 traits_type::copy(std::__to_address(__p), __s, __sz + 1); 2402 __annotate_new(__sz); 2403} 2404 2405template <class _CharT, class _Traits, class _Allocator> 2406_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__init(size_type __n, value_type __c) { 2407 if (__libcpp_is_constant_evaluated()) 2408 __rep_ = __rep(); 2409 2410 if (__n > max_size()) 2411 __throw_length_error(); 2412 pointer __p; 2413 if (__fits_in_sso(__n)) { 2414 __set_short_size(__n); 2415 __p = __get_short_pointer(); 2416 } else { 2417 auto __allocation = std::__allocate_at_least(__alloc_, __recommend(__n) + 1); 2418 __p = __allocation.ptr; 2419 __begin_lifetime(__p, __allocation.count); 2420 __set_long_pointer(__p); 2421 __set_long_cap(__allocation.count); 2422 __set_long_size(__n); 2423 } 2424 traits_type::assign(std::__to_address(__p), __n, __c); 2425 traits_type::assign(__p[__n], value_type()); 2426 __annotate_new(__n); 2427} 2428 2429template <class _CharT, class _Traits, class _Allocator> 2430template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 2431_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2432basic_string<_CharT, _Traits, _Allocator>::__init(_InputIterator __first, _InputIterator __last) { 2433 __init_with_sentinel(std::move(__first), std::move(__last)); 2434} 2435 2436template <class _CharT, class _Traits, class _Allocator> 2437template <class _InputIterator, class _Sentinel> 2438_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2439basic_string<_CharT, _Traits, _Allocator>::__init_with_sentinel(_InputIterator __first, _Sentinel __last) { 2440 __rep_ = __rep(); 2441 __annotate_new(0); 2442 2443#if _LIBCPP_HAS_EXCEPTIONS 2444 try { 2445#endif // _LIBCPP_HAS_EXCEPTIONS 2446 for (; __first != __last; ++__first) 2447 push_back(*__first); 2448#if _LIBCPP_HAS_EXCEPTIONS 2449 } catch (...) { 2450 __annotate_delete(); 2451 if (__is_long()) 2452 __alloc_traits::deallocate(__alloc_, __get_long_pointer(), __get_long_cap()); 2453 throw; 2454 } 2455#endif // _LIBCPP_HAS_EXCEPTIONS 2456} 2457 2458template <class _CharT, class _Traits, class _Allocator> 2459template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2460_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2461basic_string<_CharT, _Traits, _Allocator>::__init(_ForwardIterator __first, _ForwardIterator __last) { 2462 size_type __sz = static_cast<size_type>(std::distance(__first, __last)); 2463 __init_with_size(__first, __last, __sz); 2464} 2465 2466template <class _CharT, class _Traits, class _Allocator> 2467template <class _InputIterator, class _Sentinel> 2468_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2469basic_string<_CharT, _Traits, _Allocator>::__init_with_size(_InputIterator __first, _Sentinel __last, size_type __sz) { 2470 if (__libcpp_is_constant_evaluated()) 2471 __rep_ = __rep(); 2472 2473 if (__sz > max_size()) 2474 __throw_length_error(); 2475 2476 pointer __p; 2477 if (__fits_in_sso(__sz)) { 2478 __set_short_size(__sz); 2479 __p = __get_short_pointer(); 2480 2481 } else { 2482 auto __allocation = std::__allocate_at_least(__alloc_, __recommend(__sz) + 1); 2483 __p = __allocation.ptr; 2484 __begin_lifetime(__p, __allocation.count); 2485 __set_long_pointer(__p); 2486 __set_long_cap(__allocation.count); 2487 __set_long_size(__sz); 2488 } 2489 2490#if _LIBCPP_HAS_EXCEPTIONS 2491 try { 2492#endif // _LIBCPP_HAS_EXCEPTIONS 2493 auto __end = __copy_non_overlapping_range(__first, __last, std::__to_address(__p)); 2494 traits_type::assign(*__end, value_type()); 2495#if _LIBCPP_HAS_EXCEPTIONS 2496 } catch (...) { 2497 if (__is_long()) 2498 __alloc_traits::deallocate(__alloc_, __get_long_pointer(), __get_long_cap()); 2499 throw; 2500 } 2501#endif // _LIBCPP_HAS_EXCEPTIONS 2502 __annotate_new(__sz); 2503} 2504 2505template <class _CharT, class _Traits, class _Allocator> 2506_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace( 2507 size_type __old_cap, 2508 size_type __delta_cap, 2509 size_type __old_sz, 2510 size_type __n_copy, 2511 size_type __n_del, 2512 size_type __n_add, 2513 const value_type* __p_new_stuff) { 2514 size_type __ms = max_size(); 2515 if (__delta_cap > __ms - __old_cap - 1) 2516 __throw_length_error(); 2517 pointer __old_p = __get_pointer(); 2518 size_type __cap = 2519 __old_cap < __ms / 2 - __alignment ? __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : __ms - 1; 2520 __annotate_delete(); 2521 auto __guard = std::__make_scope_guard(__annotate_new_size(*this)); 2522 auto __allocation = std::__allocate_at_least(__alloc_, __cap + 1); 2523 pointer __p = __allocation.ptr; 2524 __begin_lifetime(__p, __allocation.count); 2525 if (__n_copy != 0) 2526 traits_type::copy(std::__to_address(__p), std::__to_address(__old_p), __n_copy); 2527 if (__n_add != 0) 2528 traits_type::copy(std::__to_address(__p) + __n_copy, __p_new_stuff, __n_add); 2529 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2530 if (__sec_cp_sz != 0) 2531 traits_type::copy( 2532 std::__to_address(__p) + __n_copy + __n_add, std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2533 if (__old_cap + 1 != __min_cap) 2534 __alloc_traits::deallocate(__alloc_, __old_p, __old_cap + 1); 2535 __set_long_pointer(__p); 2536 __set_long_cap(__allocation.count); 2537 __old_sz = __n_copy + __n_add + __sec_cp_sz; 2538 __set_long_size(__old_sz); 2539 traits_type::assign(__p[__old_sz], value_type()); 2540} 2541 2542// __grow_by is deprecated because it does not set the size. It may not update the size when the size is changed, and it 2543// may also not set the size at all when the string was short initially. This leads to unpredictable size value. It is 2544// not removed or changed to avoid breaking the ABI. 2545template <class _CharT, class _Traits, class _Allocator> 2546void _LIBCPP_CONSTEXPR_SINCE_CXX20 2547#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 2548_LIBCPP_HIDE_FROM_ABI 2549#endif 2550_LIBCPP_DEPRECATED_("use __grow_by_without_replace") basic_string<_CharT, _Traits, _Allocator>::__grow_by( 2551 size_type __old_cap, 2552 size_type __delta_cap, 2553 size_type __old_sz, 2554 size_type __n_copy, 2555 size_type __n_del, 2556 size_type __n_add) { 2557 size_type __ms = max_size(); 2558 if (__delta_cap > __ms - __old_cap) 2559 __throw_length_error(); 2560 pointer __old_p = __get_pointer(); 2561 size_type __cap = 2562 __old_cap < __ms / 2 - __alignment ? __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : __ms - 1; 2563 auto __allocation = std::__allocate_at_least(__alloc_, __cap + 1); 2564 pointer __p = __allocation.ptr; 2565 __begin_lifetime(__p, __allocation.count); 2566 if (__n_copy != 0) 2567 traits_type::copy(std::__to_address(__p), std::__to_address(__old_p), __n_copy); 2568 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2569 if (__sec_cp_sz != 0) 2570 traits_type::copy( 2571 std::__to_address(__p) + __n_copy + __n_add, std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2572 if (__old_cap + 1 != __min_cap) 2573 __alloc_traits::deallocate(__alloc_, __old_p, __old_cap + 1); 2574 __set_long_pointer(__p); 2575 __set_long_cap(__allocation.count); 2576} 2577 2578template <class _CharT, class _Traits, class _Allocator> 2579void _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 2580basic_string<_CharT, _Traits, _Allocator>::__grow_by_without_replace( 2581 size_type __old_cap, 2582 size_type __delta_cap, 2583 size_type __old_sz, 2584 size_type __n_copy, 2585 size_type __n_del, 2586 size_type __n_add) { 2587 __annotate_delete(); 2588 auto __guard = std::__make_scope_guard(__annotate_new_size(*this)); 2589 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 2590 __grow_by(__old_cap, __delta_cap, __old_sz, __n_copy, __n_del, __n_add); 2591 _LIBCPP_SUPPRESS_DEPRECATED_POP 2592 __set_long_size(__old_sz - __n_del + __n_add); 2593} 2594 2595// assign 2596 2597template <class _CharT, class _Traits, class _Allocator> 2598template <bool __is_short> 2599_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string<_CharT, _Traits, _Allocator>& 2600basic_string<_CharT, _Traits, _Allocator>::__assign_no_alias(const value_type* __s, size_type __n) { 2601 size_type __cap = __is_short ? static_cast<size_type>(__min_cap) : __get_long_cap(); 2602 if (__n < __cap) { 2603 size_type __old_size = __is_short ? __get_short_size() : __get_long_size(); 2604 if (__n > __old_size) 2605 __annotate_increase(__n - __old_size); 2606 pointer __p = __is_short ? __get_short_pointer() : __get_long_pointer(); 2607 __is_short ? __set_short_size(__n) : __set_long_size(__n); 2608 traits_type::copy(std::__to_address(__p), __s, __n); 2609 traits_type::assign(__p[__n], value_type()); 2610 if (__old_size > __n) 2611 __annotate_shrink(__old_size); 2612 } else { 2613 size_type __sz = __is_short ? __get_short_size() : __get_long_size(); 2614 __grow_by_and_replace(__cap - 1, __n - __cap + 1, __sz, 0, __sz, __n, __s); 2615 } 2616 return *this; 2617} 2618 2619template <class _CharT, class _Traits, class _Allocator> 2620_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string<_CharT, _Traits, _Allocator>& 2621basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s, size_type __n) { 2622 size_type __cap = capacity(); 2623 if (__cap >= __n) { 2624 size_type __old_size = size(); 2625 if (__n > __old_size) 2626 __annotate_increase(__n - __old_size); 2627 value_type* __p = std::__to_address(__get_pointer()); 2628 traits_type::move(__p, __s, __n); 2629 return __null_terminate_at(__p, __n); 2630 } else { 2631 size_type __sz = size(); 2632 __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); 2633 return *this; 2634 } 2635} 2636 2637template <class _CharT, class _Traits, class _Allocator> 2638_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2639basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s, size_type __n) { 2640 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::assign received nullptr"); 2641 return (__builtin_constant_p(__n) && __fits_in_sso(__n)) ? __assign_short(__s, __n) : __assign_external(__s, __n); 2642} 2643 2644template <class _CharT, class _Traits, class _Allocator> 2645_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2646basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) { 2647 size_type __cap = capacity(); 2648 size_type __old_size = size(); 2649 if (__cap < __n) { 2650 size_type __sz = size(); 2651 __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); 2652 __annotate_increase(__n); 2653 } else if (__n > __old_size) 2654 __annotate_increase(__n - __old_size); 2655 value_type* __p = std::__to_address(__get_pointer()); 2656 traits_type::assign(__p, __n, __c); 2657 return __null_terminate_at(__p, __n); 2658} 2659 2660template <class _CharT, class _Traits, class _Allocator> 2661_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2662basic_string<_CharT, _Traits, _Allocator>::operator=(value_type __c) { 2663 pointer __p; 2664 size_type __old_size = size(); 2665 if (__old_size == 0) 2666 __annotate_increase(1); 2667 if (__is_long()) { 2668 __p = __get_long_pointer(); 2669 __set_long_size(1); 2670 } else { 2671 __p = __get_short_pointer(); 2672 __set_short_size(1); 2673 } 2674 traits_type::assign(*__p, __c); 2675 traits_type::assign(*++__p, value_type()); 2676 if (__old_size > 1) 2677 __annotate_shrink(__old_size); 2678 return *this; 2679} 2680 2681template <class _CharT, class _Traits, class _Allocator> 2682_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string<_CharT, _Traits, _Allocator>& 2683basic_string<_CharT, _Traits, _Allocator>::operator=(const basic_string& __str) { 2684 if (this != std::addressof(__str)) { 2685 __copy_assign_alloc(__str); 2686 if (!__is_long()) { 2687 if (!__str.__is_long()) { 2688 size_type __old_size = __get_short_size(); 2689 if (__get_short_size() < __str.__get_short_size()) 2690 __annotate_increase(__str.__get_short_size() - __get_short_size()); 2691 __rep_ = __str.__rep_; 2692 if (__old_size > __get_short_size()) 2693 __annotate_shrink(__old_size); 2694 } else { 2695 return __assign_no_alias<true>(__str.data(), __str.size()); 2696 } 2697 } else { 2698 return __assign_no_alias<false>(__str.data(), __str.size()); 2699 } 2700 } 2701 return *this; 2702} 2703 2704#ifndef _LIBCPP_CXX03_LANG 2705 2706template <class _CharT, class _Traits, class _Allocator> 2707inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__move_assign( 2708 basic_string& __str, false_type) noexcept(__alloc_traits::is_always_equal::value) { 2709 if (__alloc_ != __str.__alloc_) 2710 assign(__str); 2711 else 2712 __move_assign(__str, true_type()); 2713} 2714 2715template <class _CharT, class _Traits, class _Allocator> 2716inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS void 2717basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type) 2718# if _LIBCPP_STD_VER >= 17 2719 noexcept 2720# else 2721 noexcept(is_nothrow_move_assignable<allocator_type>::value) 2722# endif 2723{ 2724 __annotate_delete(); 2725 if (__is_long()) { 2726 __alloc_traits::deallocate(__alloc_, __get_long_pointer(), __get_long_cap()); 2727# if _LIBCPP_STD_VER <= 14 2728 if (!is_nothrow_move_assignable<allocator_type>::value) { 2729 __set_short_size(0); 2730 traits_type::assign(__get_short_pointer()[0], value_type()); 2731 __annotate_new(0); 2732 } 2733# endif 2734 } 2735 size_type __str_old_size = __str.size(); 2736 bool __str_was_short = !__str.__is_long(); 2737 2738 __move_assign_alloc(__str); 2739 __rep_ = __str.__rep_; 2740 __str.__set_short_size(0); 2741 traits_type::assign(__str.__get_short_pointer()[0], value_type()); 2742 2743 if (__str_was_short && this != std::addressof(__str)) 2744 __str.__annotate_shrink(__str_old_size); 2745 else 2746 // ASan annotations: was long, so object memory is unpoisoned as new. 2747 // Or is same as *this, and __annotate_delete() was called. 2748 __str.__annotate_new(0); 2749 2750 // ASan annotations: Guard against `std::string s; s = std::move(s);` 2751 // You can find more here: https://en.cppreference.com/w/cpp/utility/move 2752 // Quote: "Unless otherwise specified, all standard library objects that have been moved 2753 // from are placed in a "valid but unspecified state", meaning the object's class 2754 // invariants hold (so functions without preconditions, such as the assignment operator, 2755 // can be safely used on the object after it was moved from):" 2756 // Quote: "v = std::move(v); // the value of v is unspecified" 2757 if (!__is_long() && std::addressof(__str) != this) 2758 // If it is long string, delete was never called on original __str's buffer. 2759 __annotate_new(__get_short_size()); 2760} 2761 2762#endif 2763 2764template <class _CharT, class _Traits, class _Allocator> 2765template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 2766_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2767basic_string<_CharT, _Traits, _Allocator>::assign(_InputIterator __first, _InputIterator __last) { 2768 __assign_with_sentinel(__first, __last); 2769 return *this; 2770} 2771 2772template <class _CharT, class _Traits, class _Allocator> 2773template <class _InputIterator, class _Sentinel> 2774_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 2775basic_string<_CharT, _Traits, _Allocator>::__assign_with_sentinel(_InputIterator __first, _Sentinel __last) { 2776 const basic_string __temp(__init_with_sentinel_tag(), std::move(__first), std::move(__last), __alloc_); 2777 assign(__temp.data(), __temp.size()); 2778} 2779 2780template <class _CharT, class _Traits, class _Allocator> 2781template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2782_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2783basic_string<_CharT, _Traits, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last) { 2784 if (__string_is_trivial_iterator<_ForwardIterator>::value) { 2785 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2786 __assign_trivial(__first, __last, __n); 2787 } else { 2788 __assign_with_sentinel(__first, __last); 2789 } 2790 2791 return *this; 2792} 2793 2794template <class _CharT, class _Traits, class _Allocator> 2795template <class _Iterator, class _Sentinel> 2796_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI void 2797basic_string<_CharT, _Traits, _Allocator>::__assign_trivial(_Iterator __first, _Sentinel __last, size_type __n) { 2798 _LIBCPP_ASSERT_INTERNAL( 2799 __string_is_trivial_iterator<_Iterator>::value, "The iterator type given to `__assign_trivial` must be trivial"); 2800 2801 size_type __old_size = size(); 2802 size_type __cap = capacity(); 2803 if (__cap < __n) { 2804 // Unlike `append` functions, if the input range points into the string itself, there is no case that the input 2805 // range could get invalidated by reallocation: 2806 // 1. If the input range is a subset of the string itself, its size cannot exceed the capacity of the string, 2807 // thus no reallocation would happen. 2808 // 2. In the exotic case where the input range is the byte representation of the string itself, the string 2809 // object itself stays valid even if reallocation happens. 2810 size_type __sz = size(); 2811 __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); 2812 __annotate_increase(__n); 2813 } else if (__n > __old_size) 2814 __annotate_increase(__n - __old_size); 2815 pointer __p = __get_pointer(); 2816 for (; __first != __last; ++__p, (void)++__first) 2817 traits_type::assign(*__p, *__first); 2818 traits_type::assign(*__p, value_type()); 2819 __set_size(__n); 2820 if (__n < __old_size) 2821 __annotate_shrink(__old_size); 2822} 2823 2824template <class _CharT, class _Traits, class _Allocator> 2825_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2826basic_string<_CharT, _Traits, _Allocator>::assign(const basic_string& __str, size_type __pos, size_type __n) { 2827 size_type __sz = __str.size(); 2828 if (__pos > __sz) 2829 __throw_out_of_range(); 2830 return assign(__str.data() + __pos, std::min(__n, __sz - __pos)); 2831} 2832 2833template <class _CharT, class _Traits, class _Allocator> 2834template <class _Tp, 2835 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2836 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2837 int> > 2838_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2839basic_string<_CharT, _Traits, _Allocator>::assign(const _Tp& __t, size_type __pos, size_type __n) { 2840 __self_view __sv = __t; 2841 size_type __sz = __sv.size(); 2842 if (__pos > __sz) 2843 __throw_out_of_range(); 2844 return assign(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2845} 2846 2847template <class _CharT, class _Traits, class _Allocator> 2848_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string<_CharT, _Traits, _Allocator>& 2849basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s) { 2850 return __assign_external(__s, traits_type::length(__s)); 2851} 2852 2853template <class _CharT, class _Traits, class _Allocator> 2854_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2855basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s) { 2856 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::assign received nullptr"); 2857 return __builtin_constant_p(*__s) 2858 ? (__fits_in_sso(traits_type::length(__s)) ? __assign_short(__s, traits_type::length(__s)) 2859 : __assign_external(__s, traits_type::length(__s))) 2860 : __assign_external(__s); 2861} 2862// append 2863 2864template <class _CharT, class _Traits, class _Allocator> 2865_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2866basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s, size_type __n) { 2867 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::append received nullptr"); 2868 size_type __cap = capacity(); 2869 size_type __sz = size(); 2870 if (__cap - __sz >= __n) { 2871 if (__n) { 2872 __annotate_increase(__n); 2873 value_type* __p = std::__to_address(__get_pointer()); 2874 traits_type::copy(__p + __sz, __s, __n); 2875 __sz += __n; 2876 __set_size(__sz); 2877 traits_type::assign(__p[__sz], value_type()); 2878 } 2879 } else 2880 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __sz, 0, __n, __s); 2881 return *this; 2882} 2883 2884template <class _CharT, class _Traits, class _Allocator> 2885_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2886basic_string<_CharT, _Traits, _Allocator>::append(size_type __n, value_type __c) { 2887 if (__n) { 2888 size_type __cap = capacity(); 2889 size_type __sz = size(); 2890 if (__cap - __sz < __n) 2891 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2892 __annotate_increase(__n); 2893 pointer __p = __get_pointer(); 2894 traits_type::assign(std::__to_address(__p) + __sz, __n, __c); 2895 __sz += __n; 2896 __set_size(__sz); 2897 traits_type::assign(__p[__sz], value_type()); 2898 } 2899 return *this; 2900} 2901 2902template <class _CharT, class _Traits, class _Allocator> 2903_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 2904basic_string<_CharT, _Traits, _Allocator>::__append_default_init(size_type __n) { 2905 if (__n) { 2906 size_type __cap = capacity(); 2907 size_type __sz = size(); 2908 if (__cap - __sz < __n) 2909 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2910 __annotate_increase(__n); 2911 pointer __p = __get_pointer(); 2912 __sz += __n; 2913 __set_size(__sz); 2914 traits_type::assign(__p[__sz], value_type()); 2915 } 2916} 2917 2918template <class _CharT, class _Traits, class _Allocator> 2919_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::push_back(value_type __c) { 2920 bool __is_short = !__is_long(); 2921 size_type __cap; 2922 size_type __sz; 2923 if (__is_short) { 2924 __cap = __min_cap - 1; 2925 __sz = __get_short_size(); 2926 } else { 2927 __cap = __get_long_cap() - 1; 2928 __sz = __get_long_size(); 2929 } 2930 if (__sz == __cap) { 2931 __grow_by_without_replace(__cap, 1, __sz, __sz, 0); 2932 __annotate_increase(1); 2933 __is_short = false; // the string is always long after __grow_by 2934 } else 2935 __annotate_increase(1); 2936 pointer __p = __get_pointer(); 2937 if (__is_short) { 2938 __p = __get_short_pointer() + __sz; 2939 __set_short_size(__sz + 1); 2940 } else { 2941 __p = __get_long_pointer() + __sz; 2942 __set_long_size(__sz + 1); 2943 } 2944 traits_type::assign(*__p, __c); 2945 traits_type::assign(*++__p, value_type()); 2946} 2947 2948template <class _CharT, class _Traits, class _Allocator> 2949template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2950_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2951basic_string<_CharT, _Traits, _Allocator>::append(_ForwardIterator __first, _ForwardIterator __last) { 2952 size_type __sz = size(); 2953 size_type __cap = capacity(); 2954 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2955 if (__n) { 2956 if (__string_is_trivial_iterator<_ForwardIterator>::value && !__addr_in_range(*__first)) { 2957 if (__cap - __sz < __n) 2958 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2959 __annotate_increase(__n); 2960 auto __end = __copy_non_overlapping_range(__first, __last, std::__to_address(__get_pointer() + __sz)); 2961 traits_type::assign(*__end, value_type()); 2962 __set_size(__sz + __n); 2963 } else { 2964 const basic_string __temp(__first, __last, __alloc_); 2965 append(__temp.data(), __temp.size()); 2966 } 2967 } 2968 return *this; 2969} 2970 2971template <class _CharT, class _Traits, class _Allocator> 2972_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2973basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str, size_type __pos, size_type __n) { 2974 size_type __sz = __str.size(); 2975 if (__pos > __sz) 2976 __throw_out_of_range(); 2977 return append(__str.data() + __pos, std::min(__n, __sz - __pos)); 2978} 2979 2980template <class _CharT, class _Traits, class _Allocator> 2981template <class _Tp, 2982 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2983 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2984 int> > 2985_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2986basic_string<_CharT, _Traits, _Allocator>::append(const _Tp& __t, size_type __pos, size_type __n) { 2987 __self_view __sv = __t; 2988 size_type __sz = __sv.size(); 2989 if (__pos > __sz) 2990 __throw_out_of_range(); 2991 return append(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2992} 2993 2994template <class _CharT, class _Traits, class _Allocator> 2995_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2996basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s) { 2997 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::append received nullptr"); 2998 return append(__s, traits_type::length(__s)); 2999} 3000 3001// insert 3002 3003template <class _CharT, class _Traits, class _Allocator> 3004_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3005basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s, size_type __n) { 3006 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::insert received nullptr"); 3007 size_type __sz = size(); 3008 if (__pos > __sz) 3009 __throw_out_of_range(); 3010 size_type __cap = capacity(); 3011 if (__cap - __sz >= __n) { 3012 if (__n) { 3013 __annotate_increase(__n); 3014 value_type* __p = std::__to_address(__get_pointer()); 3015 size_type __n_move = __sz - __pos; 3016 if (__n_move != 0) { 3017 if (std::__is_pointer_in_range(__p + __pos, __p + __sz, __s)) 3018 __s += __n; 3019 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 3020 } 3021 traits_type::move(__p + __pos, __s, __n); 3022 __sz += __n; 3023 __set_size(__sz); 3024 traits_type::assign(__p[__sz], value_type()); 3025 } 3026 } else 3027 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); 3028 return *this; 3029} 3030 3031template <class _CharT, class _Traits, class _Allocator> 3032_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3033basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, size_type __n, value_type __c) { 3034 size_type __sz = size(); 3035 if (__pos > __sz) 3036 __throw_out_of_range(); 3037 if (__n) { 3038 size_type __cap = capacity(); 3039 value_type* __p; 3040 if (__cap - __sz >= __n) { 3041 __annotate_increase(__n); 3042 __p = std::__to_address(__get_pointer()); 3043 size_type __n_move = __sz - __pos; 3044 if (__n_move != 0) 3045 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 3046 } else { 3047 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n); 3048 __p = std::__to_address(__get_long_pointer()); 3049 } 3050 traits_type::assign(__p + __pos, __n, __c); 3051 __sz += __n; 3052 __set_size(__sz); 3053 traits_type::assign(__p[__sz], value_type()); 3054 } 3055 return *this; 3056} 3057 3058template <class _CharT, class _Traits, class _Allocator> 3059template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 3060_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3061basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) { 3062 const basic_string __temp(__first, __last, __alloc_); 3063 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 3064} 3065 3066template <class _CharT, class _Traits, class _Allocator> 3067template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 3068_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3069basic_string<_CharT, _Traits, _Allocator>::insert( 3070 const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) { 3071 auto __n = static_cast<size_type>(std::distance(__first, __last)); 3072 return __insert_with_size(__pos, __first, __last, __n); 3073} 3074 3075template <class _CharT, class _Traits, class _Allocator> 3076template <class _Iterator, class _Sentinel> 3077_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3078basic_string<_CharT, _Traits, _Allocator>::__insert_with_size( 3079 const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n) { 3080 size_type __ip = static_cast<size_type>(__pos - begin()); 3081 if (__n == 0) 3082 return begin() + __ip; 3083 3084 if (__string_is_trivial_iterator<_Iterator>::value && !__addr_in_range(*__first)) { 3085 return __insert_from_safe_copy(__n, __ip, __first, __last); 3086 } else { 3087 const basic_string __temp(__init_with_sentinel_tag(), __first, __last, __alloc_); 3088 return __insert_from_safe_copy(__n, __ip, __temp.begin(), __temp.end()); 3089 } 3090} 3091 3092template <class _CharT, class _Traits, class _Allocator> 3093_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3094basic_string<_CharT, _Traits, _Allocator>::insert( 3095 size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n) { 3096 size_type __str_sz = __str.size(); 3097 if (__pos2 > __str_sz) 3098 __throw_out_of_range(); 3099 return insert(__pos1, __str.data() + __pos2, std::min(__n, __str_sz - __pos2)); 3100} 3101 3102template <class _CharT, class _Traits, class _Allocator> 3103template <class _Tp, 3104 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3105 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3106 int> > 3107_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3108basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n) { 3109 __self_view __sv = __t; 3110 size_type __str_sz = __sv.size(); 3111 if (__pos2 > __str_sz) 3112 __throw_out_of_range(); 3113 return insert(__pos1, __sv.data() + __pos2, std::min(__n, __str_sz - __pos2)); 3114} 3115 3116template <class _CharT, class _Traits, class _Allocator> 3117_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3118basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) { 3119 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::insert received nullptr"); 3120 return insert(__pos, __s, traits_type::length(__s)); 3121} 3122 3123template <class _CharT, class _Traits, class _Allocator> 3124_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3125basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) { 3126 size_type __ip = static_cast<size_type>(__pos - begin()); 3127 size_type __sz = size(); 3128 size_type __cap = capacity(); 3129 value_type* __p; 3130 if (__cap == __sz) { 3131 __grow_by_without_replace(__cap, 1, __sz, __ip, 0, 1); 3132 __p = std::__to_address(__get_long_pointer()); 3133 } else { 3134 __annotate_increase(1); 3135 __p = std::__to_address(__get_pointer()); 3136 size_type __n_move = __sz - __ip; 3137 if (__n_move != 0) 3138 traits_type::move(__p + __ip + 1, __p + __ip, __n_move); 3139 } 3140 traits_type::assign(__p[__ip], __c); 3141 traits_type::assign(__p[++__sz], value_type()); 3142 __set_size(__sz); 3143 return begin() + static_cast<difference_type>(__ip); 3144} 3145 3146// replace 3147 3148template <class _CharT, class _Traits, class _Allocator> 3149_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3150basic_string<_CharT, _Traits, _Allocator>::replace( 3151 size_type __pos, size_type __n1, const value_type* __s, size_type __n2) 3152 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK { 3153 _LIBCPP_ASSERT_NON_NULL(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); 3154 size_type __sz = size(); 3155 if (__pos > __sz) 3156 __throw_out_of_range(); 3157 __n1 = std::min(__n1, __sz - __pos); 3158 size_type __cap = capacity(); 3159 if (__cap - __sz + __n1 >= __n2) { 3160 value_type* __p = std::__to_address(__get_pointer()); 3161 if (__n1 != __n2) { 3162 if (__n2 > __n1) 3163 __annotate_increase(__n2 - __n1); 3164 size_type __n_move = __sz - __pos - __n1; 3165 if (__n_move != 0) { 3166 if (__n1 > __n2) { 3167 traits_type::move(__p + __pos, __s, __n2); 3168 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3169 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 3170 } 3171 if (std::__is_pointer_in_range(__p + __pos + 1, __p + __sz, __s)) { 3172 if (__p + __pos + __n1 <= __s) 3173 __s += __n2 - __n1; 3174 else // __p + __pos < __s < __p + __pos + __n1 3175 { 3176 traits_type::move(__p + __pos, __s, __n1); 3177 __pos += __n1; 3178 __s += __n2; 3179 __n2 -= __n1; 3180 __n1 = 0; 3181 } 3182 } 3183 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3184 } 3185 } 3186 traits_type::move(__p + __pos, __s, __n2); 3187 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 3188 } else 3189 __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); 3190 return *this; 3191} 3192 3193template <class _CharT, class _Traits, class _Allocator> 3194_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3195basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) { 3196 size_type __sz = size(); 3197 if (__pos > __sz) 3198 __throw_out_of_range(); 3199 __n1 = std::min(__n1, __sz - __pos); 3200 size_type __cap = capacity(); 3201 value_type* __p; 3202 if (__cap - __sz + __n1 >= __n2) { 3203 __p = std::__to_address(__get_pointer()); 3204 if (__n1 != __n2) { 3205 if (__n2 > __n1) 3206 __annotate_increase(__n2 - __n1); 3207 size_type __n_move = __sz - __pos - __n1; 3208 if (__n_move != 0) 3209 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3210 } 3211 } else { 3212 __grow_by_without_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); 3213 __p = std::__to_address(__get_long_pointer()); 3214 } 3215 traits_type::assign(__p + __pos, __n2, __c); 3216 return __null_terminate_at(__p, __sz - (__n1 - __n2)); 3217} 3218 3219template <class _CharT, class _Traits, class _Allocator> 3220template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> > 3221_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3222basic_string<_CharT, _Traits, _Allocator>::replace( 3223 const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2) { 3224 const basic_string __temp(__j1, __j2, __alloc_); 3225 return replace(__i1, __i2, __temp); 3226} 3227 3228template <class _CharT, class _Traits, class _Allocator> 3229_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3230basic_string<_CharT, _Traits, _Allocator>::replace( 3231 size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2) { 3232 size_type __str_sz = __str.size(); 3233 if (__pos2 > __str_sz) 3234 __throw_out_of_range(); 3235 return replace(__pos1, __n1, __str.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 3236} 3237 3238template <class _CharT, class _Traits, class _Allocator> 3239template <class _Tp, 3240 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3241 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3242 int> > 3243_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3244basic_string<_CharT, _Traits, _Allocator>::replace( 3245 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) { 3246 __self_view __sv = __t; 3247 size_type __str_sz = __sv.size(); 3248 if (__pos2 > __str_sz) 3249 __throw_out_of_range(); 3250 return replace(__pos1, __n1, __sv.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 3251} 3252 3253template <class _CharT, class _Traits, class _Allocator> 3254_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3255basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) { 3256 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::replace received nullptr"); 3257 return replace(__pos, __n1, __s, traits_type::length(__s)); 3258} 3259 3260// erase 3261 3262// 'externally instantiated' erase() implementation, called when __n != npos. 3263// Does not check __pos against size() 3264template <class _CharT, class _Traits, class _Allocator> 3265_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void 3266basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move(size_type __pos, size_type __n) { 3267 if (__n) { 3268 size_type __sz = size(); 3269 value_type* __p = std::__to_address(__get_pointer()); 3270 __n = std::min(__n, __sz - __pos); 3271 size_type __n_move = __sz - __pos - __n; 3272 if (__n_move != 0) 3273 traits_type::move(__p + __pos, __p + __pos + __n, __n_move); 3274 __null_terminate_at(__p, __sz - __n); 3275 } 3276} 3277 3278template <class _CharT, class _Traits, class _Allocator> 3279_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3280basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, size_type __n) { 3281 if (__pos > size()) 3282 __throw_out_of_range(); 3283 if (__n == npos) { 3284 __erase_to_end(__pos); 3285 } else { 3286 __erase_external_with_move(__pos, __n); 3287 } 3288 return *this; 3289} 3290 3291template <class _CharT, class _Traits, class _Allocator> 3292inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3293basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) { 3294 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS( 3295 __pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); 3296 iterator __b = begin(); 3297 size_type __r = static_cast<size_type>(__pos - __b); 3298 erase(__r, 1); 3299 return __b + static_cast<difference_type>(__r); 3300} 3301 3302template <class _CharT, class _Traits, class _Allocator> 3303inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3304basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) { 3305 _LIBCPP_ASSERT_VALID_INPUT_RANGE(__first <= __last, "string::erase(first, last) called with invalid range"); 3306 iterator __b = begin(); 3307 size_type __r = static_cast<size_type>(__first - __b); 3308 erase(__r, static_cast<size_type>(__last - __first)); 3309 return __b + static_cast<difference_type>(__r); 3310} 3311 3312template <class _CharT, class _Traits, class _Allocator> 3313inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::pop_back() { 3314 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::pop_back(): string is already empty"); 3315 __erase_to_end(size() - 1); 3316} 3317 3318template <class _CharT, class _Traits, class _Allocator> 3319inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT { 3320 size_type __old_size = size(); 3321 if (__is_long()) { 3322 traits_type::assign(*__get_long_pointer(), value_type()); 3323 __set_long_size(0); 3324 } else { 3325 traits_type::assign(*__get_short_pointer(), value_type()); 3326 __set_short_size(0); 3327 } 3328 __annotate_shrink(__old_size); 3329} 3330 3331template <class _CharT, class _Traits, class _Allocator> 3332_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) { 3333 size_type __sz = size(); 3334 if (__n > __sz) 3335 append(__n - __sz, __c); 3336 else 3337 __erase_to_end(__n); 3338} 3339 3340template <class _CharT, class _Traits, class _Allocator> 3341_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 3342basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) { 3343 size_type __sz = size(); 3344 if (__n > __sz) { 3345 __append_default_init(__n - __sz); 3346 } else 3347 __erase_to_end(__n); 3348} 3349 3350template <class _CharT, class _Traits, class _Allocator> 3351_LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacity) { 3352 if (__requested_capacity > max_size()) 3353 __throw_length_error(); 3354 3355 // Make sure reserve(n) never shrinks. This is technically only required in C++20 3356 // and later (since P0966R1), however we provide consistent behavior in all Standard 3357 // modes because this function is instantiated in the shared library. 3358 if (__requested_capacity <= capacity()) 3359 return; 3360 3361 __shrink_or_extend(__recommend(__requested_capacity)); 3362} 3363 3364template <class _CharT, class _Traits, class _Allocator> 3365inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT { 3366 size_type __target_capacity = __recommend(size()); 3367 if (__target_capacity == capacity()) 3368 return; 3369 3370 __shrink_or_extend(__target_capacity); 3371} 3372 3373template <class _CharT, class _Traits, class _Allocator> 3374inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void 3375basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) { 3376 __annotate_delete(); 3377 auto __guard = std::__make_scope_guard(__annotate_new_size(*this)); 3378 size_type __cap = capacity(); 3379 size_type __sz = size(); 3380 3381 pointer __new_data, __p; 3382 bool __was_long, __now_long; 3383 if (__fits_in_sso(__target_capacity)) { 3384 __was_long = true; 3385 __now_long = false; 3386 __new_data = __get_short_pointer(); 3387 __p = __get_long_pointer(); 3388 } else { 3389 if (__target_capacity > __cap) { 3390 // Extend 3391 // - called from reserve should propagate the exception thrown. 3392 auto __allocation = std::__allocate_at_least(__alloc_, __target_capacity + 1); 3393 __new_data = __allocation.ptr; 3394 __target_capacity = __allocation.count - 1; 3395 } else { 3396 // Shrink 3397 // - called from shrink_to_fit should not throw. 3398 // - called from reserve may throw but is not required to. 3399#if _LIBCPP_HAS_EXCEPTIONS 3400 try { 3401#endif // _LIBCPP_HAS_EXCEPTIONS 3402 auto __allocation = std::__allocate_at_least(__alloc_, __target_capacity + 1); 3403 3404 // The Standard mandates shrink_to_fit() does not increase the capacity. 3405 // With equal capacity keep the existing buffer. This avoids extra work 3406 // due to swapping the elements. 3407 if (__allocation.count - 1 > capacity()) { 3408 __alloc_traits::deallocate(__alloc_, __allocation.ptr, __allocation.count); 3409 return; 3410 } 3411 __new_data = __allocation.ptr; 3412 __target_capacity = __allocation.count - 1; 3413#if _LIBCPP_HAS_EXCEPTIONS 3414 } catch (...) { 3415 return; 3416 } 3417#endif // _LIBCPP_HAS_EXCEPTIONS 3418 } 3419 __begin_lifetime(__new_data, __target_capacity + 1); 3420 __now_long = true; 3421 __was_long = __is_long(); 3422 __p = __get_pointer(); 3423 } 3424 traits_type::copy(std::__to_address(__new_data), std::__to_address(__p), size() + 1); 3425 if (__was_long) 3426 __alloc_traits::deallocate(__alloc_, __p, __cap + 1); 3427 if (__now_long) { 3428 __set_long_cap(__target_capacity + 1); 3429 __set_long_size(__sz); 3430 __set_long_pointer(__new_data); 3431 } else 3432 __set_short_size(__sz); 3433} 3434 3435template <class _CharT, class _Traits, class _Allocator> 3436_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3437basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const { 3438 if (__n >= size()) 3439 __throw_out_of_range(); 3440 return (*this)[__n]; 3441} 3442 3443template <class _CharT, class _Traits, class _Allocator> 3444_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::reference 3445basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) { 3446 if (__n >= size()) 3447 __throw_out_of_range(); 3448 return (*this)[__n]; 3449} 3450 3451template <class _CharT, class _Traits, class _Allocator> 3452_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3453basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const { 3454 size_type __sz = size(); 3455 if (__pos > __sz) 3456 __throw_out_of_range(); 3457 size_type __rlen = std::min(__n, __sz - __pos); 3458 traits_type::copy(__s, data() + __pos, __rlen); 3459 return __rlen; 3460} 3461 3462template <class _CharT, class _Traits, class _Allocator> 3463inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) 3464#if _LIBCPP_STD_VER >= 14 3465 _NOEXCEPT 3466#else 3467 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || __is_nothrow_swappable_v<allocator_type>) 3468#endif 3469{ 3470 _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( 3471 __alloc_traits::propagate_on_container_swap::value || __alloc_traits::is_always_equal::value || 3472 __alloc_ == __str.__alloc_, 3473 "swapping non-equal allocators"); 3474 if (!__is_long()) 3475 __annotate_delete(); 3476 if (this != std::addressof(__str) && !__str.__is_long()) 3477 __str.__annotate_delete(); 3478 std::swap(__rep_, __str.__rep_); 3479 std::__swap_allocator(__alloc_, __str.__alloc_); 3480 if (!__is_long()) 3481 __annotate_new(__get_short_size()); 3482 if (this != std::addressof(__str) && !__str.__is_long()) 3483 __str.__annotate_new(__str.__get_short_size()); 3484} 3485 3486// find 3487 3488template <class _CharT, class _Traits, class _Allocator> 3489_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3490basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3491 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find(): received nullptr"); 3492 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3493} 3494 3495template <class _CharT, class _Traits, class _Allocator> 3496inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3497basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3498 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __str.data(), __pos, __str.size()); 3499} 3500 3501template <class _CharT, class _Traits, class _Allocator> 3502template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3503_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3504basic_string<_CharT, _Traits, _Allocator>::find(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3505 __self_view __sv = __t; 3506 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __sv.data(), __pos, __sv.size()); 3507} 3508 3509template <class _CharT, class _Traits, class _Allocator> 3510inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3511basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, size_type __pos) const _NOEXCEPT { 3512 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find(): received nullptr"); 3513 return std::__str_find<value_type, size_type, traits_type, npos>( 3514 data(), size(), __s, __pos, traits_type::length(__s)); 3515} 3516 3517template <class _CharT, class _Traits, class _Allocator> 3518_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3519basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, size_type __pos) const _NOEXCEPT { 3520 return std::__str_find<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3521} 3522 3523// rfind 3524 3525template <class _CharT, class _Traits, class _Allocator> 3526_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3527basic_string<_CharT, _Traits, _Allocator>::rfind( 3528 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3529 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); 3530 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3531} 3532 3533template <class _CharT, class _Traits, class _Allocator> 3534inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3535basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3536 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __str.data(), __pos, __str.size()); 3537} 3538 3539template <class _CharT, class _Traits, class _Allocator> 3540template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3541_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3542basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3543 __self_view __sv = __t; 3544 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __sv.data(), __pos, __sv.size()); 3545} 3546 3547template <class _CharT, class _Traits, class _Allocator> 3548inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3549basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, size_type __pos) const _NOEXCEPT { 3550 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::rfind(): received nullptr"); 3551 return std::__str_rfind<value_type, size_type, traits_type, npos>( 3552 data(), size(), __s, __pos, traits_type::length(__s)); 3553} 3554 3555template <class _CharT, class _Traits, class _Allocator> 3556_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3557basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, size_type __pos) const _NOEXCEPT { 3558 return std::__str_rfind<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3559} 3560 3561// find_first_of 3562 3563template <class _CharT, class _Traits, class _Allocator> 3564_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3565basic_string<_CharT, _Traits, _Allocator>::find_first_of( 3566 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3567 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); 3568 return std::__str_find_first_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3569} 3570 3571template <class _CharT, class _Traits, class _Allocator> 3572inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3573basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3574 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 3575 data(), size(), __str.data(), __pos, __str.size()); 3576} 3577 3578template <class _CharT, class _Traits, class _Allocator> 3579template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3580_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3581basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3582 __self_view __sv = __t; 3583 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 3584 data(), size(), __sv.data(), __pos, __sv.size()); 3585} 3586 3587template <class _CharT, class _Traits, class _Allocator> 3588inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3589basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3590 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_first_of(): received nullptr"); 3591 return std::__str_find_first_of<value_type, size_type, traits_type, npos>( 3592 data(), size(), __s, __pos, traits_type::length(__s)); 3593} 3594 3595template <class _CharT, class _Traits, class _Allocator> 3596inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3597basic_string<_CharT, _Traits, _Allocator>::find_first_of(value_type __c, size_type __pos) const _NOEXCEPT { 3598 return find(__c, __pos); 3599} 3600 3601// find_last_of 3602 3603template <class _CharT, class _Traits, class _Allocator> 3604inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3605basic_string<_CharT, _Traits, _Allocator>::find_last_of( 3606 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3607 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); 3608 return std::__str_find_last_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3609} 3610 3611template <class _CharT, class _Traits, class _Allocator> 3612inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3613basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, size_type __pos) const _NOEXCEPT { 3614 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 3615 data(), size(), __str.data(), __pos, __str.size()); 3616} 3617 3618template <class _CharT, class _Traits, class _Allocator> 3619template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3620_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3621basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3622 __self_view __sv = __t; 3623 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 3624 data(), size(), __sv.data(), __pos, __sv.size()); 3625} 3626 3627template <class _CharT, class _Traits, class _Allocator> 3628inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3629basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3630 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_last_of(): received nullptr"); 3631 return std::__str_find_last_of<value_type, size_type, traits_type, npos>( 3632 data(), size(), __s, __pos, traits_type::length(__s)); 3633} 3634 3635template <class _CharT, class _Traits, class _Allocator> 3636inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3637basic_string<_CharT, _Traits, _Allocator>::find_last_of(value_type __c, size_type __pos) const _NOEXCEPT { 3638 return rfind(__c, __pos); 3639} 3640 3641// find_first_not_of 3642 3643template <class _CharT, class _Traits, class _Allocator> 3644_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3645basic_string<_CharT, _Traits, _Allocator>::find_first_not_of( 3646 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3647 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); 3648 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3649} 3650 3651template <class _CharT, class _Traits, class _Allocator> 3652inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3653basic_string<_CharT, _Traits, _Allocator>::find_first_not_of( 3654 const basic_string& __str, size_type __pos) const _NOEXCEPT { 3655 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 3656 data(), size(), __str.data(), __pos, __str.size()); 3657} 3658 3659template <class _CharT, class _Traits, class _Allocator> 3660template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3661_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3662basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3663 __self_view __sv = __t; 3664 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 3665 data(), size(), __sv.data(), __pos, __sv.size()); 3666} 3667 3668template <class _CharT, class _Traits, class _Allocator> 3669inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3670basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3671 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_first_not_of(): received nullptr"); 3672 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>( 3673 data(), size(), __s, __pos, traits_type::length(__s)); 3674} 3675 3676template <class _CharT, class _Traits, class _Allocator> 3677inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3678basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(value_type __c, size_type __pos) const _NOEXCEPT { 3679 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3680} 3681 3682// find_last_not_of 3683 3684template <class _CharT, class _Traits, class _Allocator> 3685_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3686basic_string<_CharT, _Traits, _Allocator>::find_last_not_of( 3687 const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT { 3688 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); 3689 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>(data(), size(), __s, __pos, __n); 3690} 3691 3692template <class _CharT, class _Traits, class _Allocator> 3693inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3694basic_string<_CharT, _Traits, _Allocator>::find_last_not_of( 3695 const basic_string& __str, size_type __pos) const _NOEXCEPT { 3696 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 3697 data(), size(), __str.data(), __pos, __str.size()); 3698} 3699 3700template <class _CharT, class _Traits, class _Allocator> 3701template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3702_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3703basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, size_type __pos) const _NOEXCEPT { 3704 __self_view __sv = __t; 3705 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 3706 data(), size(), __sv.data(), __pos, __sv.size()); 3707} 3708 3709template <class _CharT, class _Traits, class _Allocator> 3710inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3711basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, size_type __pos) const _NOEXCEPT { 3712 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_last_not_of(): received nullptr"); 3713 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>( 3714 data(), size(), __s, __pos, traits_type::length(__s)); 3715} 3716 3717template <class _CharT, class _Traits, class _Allocator> 3718inline _LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3719basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(value_type __c, size_type __pos) const _NOEXCEPT { 3720 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos>(data(), size(), __c, __pos); 3721} 3722 3723// compare 3724 3725template <class _CharT, class _Traits, class _Allocator> 3726template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3727_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const _NOEXCEPT { 3728 __self_view __sv = __t; 3729 size_t __lhs_sz = size(); 3730 size_t __rhs_sz = __sv.size(); 3731 int __result = traits_type::compare(data(), __sv.data(), std::min(__lhs_sz, __rhs_sz)); 3732 if (__result != 0) 3733 return __result; 3734 if (__lhs_sz < __rhs_sz) 3735 return -1; 3736 if (__lhs_sz > __rhs_sz) 3737 return 1; 3738 return 0; 3739} 3740 3741template <class _CharT, class _Traits, class _Allocator> 3742inline _LIBCPP_CONSTEXPR_SINCE_CXX20 int 3743basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT { 3744 return compare(__self_view(__str)); 3745} 3746 3747template <class _CharT, class _Traits, class _Allocator> 3748inline _LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3749 size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const { 3750 _LIBCPP_ASSERT_NON_NULL(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); 3751 size_type __sz = size(); 3752 if (__pos1 > __sz || __n2 == npos) 3753 __throw_out_of_range(); 3754 size_type __rlen = std::min(__n1, __sz - __pos1); 3755 int __r = traits_type::compare(data() + __pos1, __s, std::min(__rlen, __n2)); 3756 if (__r == 0) { 3757 if (__rlen < __n2) 3758 __r = -1; 3759 else if (__rlen > __n2) 3760 __r = 1; 3761 } 3762 return __r; 3763} 3764 3765template <class _CharT, class _Traits, class _Allocator> 3766template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3767_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3768basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, size_type __n1, const _Tp& __t) const { 3769 __self_view __sv = __t; 3770 return compare(__pos1, __n1, __sv.data(), __sv.size()); 3771} 3772 3773template <class _CharT, class _Traits, class _Allocator> 3774inline _LIBCPP_CONSTEXPR_SINCE_CXX20 int 3775basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, size_type __n1, const basic_string& __str) const { 3776 return compare(__pos1, __n1, __str.data(), __str.size()); 3777} 3778 3779template <class _CharT, class _Traits, class _Allocator> 3780template <class _Tp, 3781 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3782 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3783 int> > 3784_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3785 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) const { 3786 __self_view __sv = __t; 3787 return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 3788} 3789 3790template <class _CharT, class _Traits, class _Allocator> 3791_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3792 size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2) const { 3793 return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); 3794} 3795 3796template <class _CharT, class _Traits, class _Allocator> 3797_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3798basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT { 3799 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::compare(): received nullptr"); 3800 return compare(0, npos, __s, traits_type::length(__s)); 3801} 3802 3803template <class _CharT, class _Traits, class _Allocator> 3804_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3805basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, size_type __n1, const value_type* __s) const { 3806 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::compare(): received nullptr"); 3807 return compare(__pos1, __n1, __s, traits_type::length(__s)); 3808} 3809 3810// __invariants 3811 3812template <class _CharT, class _Traits, class _Allocator> 3813inline _LIBCPP_CONSTEXPR_SINCE_CXX20 bool basic_string<_CharT, _Traits, _Allocator>::__invariants() const { 3814 if (size() > capacity()) 3815 return false; 3816 if (capacity() < __min_cap - 1) 3817 return false; 3818 if (data() == nullptr) 3819 return false; 3820 if (!_Traits::eq(data()[size()], value_type())) 3821 return false; 3822 return true; 3823} 3824 3825// __clear_and_shrink 3826 3827template <class _CharT, class _Traits, class _Allocator> 3828inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT { 3829 clear(); 3830 if (__is_long()) { 3831 __annotate_delete(); 3832 __alloc_traits::deallocate(__alloc_, __get_long_pointer(), capacity() + 1); 3833 __rep_ = __rep(); 3834 } 3835} 3836 3837// operator== 3838 3839template <class _CharT, class _Traits, class _Allocator> 3840inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool 3841operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3842 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3843#if _LIBCPP_STD_VER >= 20 3844 return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); 3845#else 3846 size_t __lhs_sz = __lhs.size(); 3847 return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), __rhs.data(), __lhs_sz) == 0; 3848#endif 3849} 3850 3851template <class _Allocator> 3852inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool 3853operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, 3854 const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT { 3855 size_t __sz = __lhs.size(); 3856 if (__sz != __rhs.size()) 3857 return false; 3858 return char_traits<char>::compare(__lhs.data(), __rhs.data(), __sz) == 0; 3859} 3860 3861#if _LIBCPP_STD_VER <= 17 3862template <class _CharT, class _Traits, class _Allocator> 3863inline _LIBCPP_HIDE_FROM_ABI bool 3864operator==(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3865 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3866 _LIBCPP_ASSERT_NON_NULL(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); 3867 size_t __lhs_len = _Traits::length(__lhs); 3868 if (__lhs_len != __rhs.size()) 3869 return false; 3870 return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; 3871} 3872#endif // _LIBCPP_STD_VER <= 17 3873 3874template <class _CharT, class _Traits, class _Allocator> 3875inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI bool 3876operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3877 _LIBCPP_ASSERT_NON_NULL(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); 3878 3879 using _String = basic_string<_CharT, _Traits, _Allocator>; 3880 3881 size_t __rhs_len = _Traits::length(__rhs); 3882 if (__builtin_constant_p(__rhs_len) && !_String::__fits_in_sso(__rhs_len)) { 3883 if (!__lhs.__is_long()) 3884 return false; 3885 } 3886 if (__rhs_len != __lhs.size()) 3887 return false; 3888 return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; 3889} 3890 3891#if _LIBCPP_STD_VER >= 20 3892 3893template <class _CharT, class _Traits, class _Allocator> 3894_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3895 const basic_string<_CharT, _Traits, _Allocator>& __rhs) noexcept { 3896 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 3897} 3898 3899template <class _CharT, class _Traits, class _Allocator> 3900_LIBCPP_HIDE_FROM_ABI constexpr auto 3901operator<=>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) { 3902 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 3903} 3904 3905#else // _LIBCPP_STD_VER >= 20 3906 3907template <class _CharT, class _Traits, class _Allocator> 3908inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3909 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3910 return !(__lhs == __rhs); 3911} 3912 3913template <class _CharT, class _Traits, class _Allocator> 3914inline _LIBCPP_HIDE_FROM_ABI bool 3915operator!=(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3916 return !(__lhs == __rhs); 3917} 3918 3919template <class _CharT, class _Traits, class _Allocator> 3920inline _LIBCPP_HIDE_FROM_ABI bool 3921operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3922 return !(__lhs == __rhs); 3923} 3924 3925// operator< 3926 3927template <class _CharT, class _Traits, class _Allocator> 3928inline _LIBCPP_HIDE_FROM_ABI bool operator<(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3929 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3930 return __lhs.compare(__rhs) < 0; 3931} 3932 3933template <class _CharT, class _Traits, class _Allocator> 3934inline _LIBCPP_HIDE_FROM_ABI bool 3935operator<(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3936 return __lhs.compare(__rhs) < 0; 3937} 3938 3939template <class _CharT, class _Traits, class _Allocator> 3940inline _LIBCPP_HIDE_FROM_ABI bool 3941operator<(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3942 return __rhs.compare(__lhs) > 0; 3943} 3944 3945// operator> 3946 3947template <class _CharT, class _Traits, class _Allocator> 3948inline _LIBCPP_HIDE_FROM_ABI bool operator>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3949 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3950 return __rhs < __lhs; 3951} 3952 3953template <class _CharT, class _Traits, class _Allocator> 3954inline _LIBCPP_HIDE_FROM_ABI bool 3955operator>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3956 return __rhs < __lhs; 3957} 3958 3959template <class _CharT, class _Traits, class _Allocator> 3960inline _LIBCPP_HIDE_FROM_ABI bool 3961operator>(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3962 return __rhs < __lhs; 3963} 3964 3965// operator<= 3966 3967template <class _CharT, class _Traits, class _Allocator> 3968inline _LIBCPP_HIDE_FROM_ABI bool operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3969 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3970 return !(__rhs < __lhs); 3971} 3972 3973template <class _CharT, class _Traits, class _Allocator> 3974inline _LIBCPP_HIDE_FROM_ABI bool 3975operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3976 return !(__rhs < __lhs); 3977} 3978 3979template <class _CharT, class _Traits, class _Allocator> 3980inline _LIBCPP_HIDE_FROM_ABI bool 3981operator<=(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3982 return !(__rhs < __lhs); 3983} 3984 3985// operator>= 3986 3987template <class _CharT, class _Traits, class _Allocator> 3988inline _LIBCPP_HIDE_FROM_ABI bool operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3989 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 3990 return !(__lhs < __rhs); 3991} 3992 3993template <class _CharT, class _Traits, class _Allocator> 3994inline _LIBCPP_HIDE_FROM_ABI bool 3995operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) _NOEXCEPT { 3996 return !(__lhs < __rhs); 3997} 3998 3999template <class _CharT, class _Traits, class _Allocator> 4000inline _LIBCPP_HIDE_FROM_ABI bool 4001operator>=(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT { 4002 return !(__lhs < __rhs); 4003} 4004#endif // _LIBCPP_STD_VER >= 20 4005 4006// operator + 4007 4008template <class _CharT, class _Traits, class _Allocator> 4009_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4010operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4011 const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4012 using _String = basic_string<_CharT, _Traits, _Allocator>; 4013 auto __lhs_sz = __lhs.size(); 4014 auto __rhs_sz = __rhs.size(); 4015 _String __r(__uninitialized_size_tag(), 4016 __lhs_sz + __rhs_sz, 4017 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4018 auto __ptr = std::__to_address(__r.__get_pointer()); 4019 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4020 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4021 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4022 return __r; 4023} 4024 4025template <class _CharT, class _Traits, class _Allocator> 4026_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4027operator+(const _CharT* __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4028 using _String = basic_string<_CharT, _Traits, _Allocator>; 4029 auto __lhs_sz = _Traits::length(__lhs); 4030 auto __rhs_sz = __rhs.size(); 4031 _String __r(__uninitialized_size_tag(), 4032 __lhs_sz + __rhs_sz, 4033 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4034 auto __ptr = std::__to_address(__r.__get_pointer()); 4035 _Traits::copy(__ptr, __lhs, __lhs_sz); 4036 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4037 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4038 return __r; 4039} 4040 4041template <class _CharT, class _Traits, class _Allocator> 4042_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4043operator+(_CharT __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4044 using _String = basic_string<_CharT, _Traits, _Allocator>; 4045 typename _String::size_type __rhs_sz = __rhs.size(); 4046 _String __r(__uninitialized_size_tag(), 4047 __rhs_sz + 1, 4048 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4049 auto __ptr = std::__to_address(__r.__get_pointer()); 4050 _Traits::assign(__ptr, 1, __lhs); 4051 _Traits::copy(__ptr + 1, __rhs.data(), __rhs_sz); 4052 _Traits::assign(__ptr + 1 + __rhs_sz, 1, _CharT()); 4053 return __r; 4054} 4055 4056template <class _CharT, class _Traits, class _Allocator> 4057inline _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4058operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) { 4059 using _String = basic_string<_CharT, _Traits, _Allocator>; 4060 typename _String::size_type __lhs_sz = __lhs.size(); 4061 typename _String::size_type __rhs_sz = _Traits::length(__rhs); 4062 _String __r(__uninitialized_size_tag(), 4063 __lhs_sz + __rhs_sz, 4064 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4065 auto __ptr = std::__to_address(__r.__get_pointer()); 4066 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4067 _Traits::copy(__ptr + __lhs_sz, __rhs, __rhs_sz); 4068 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4069 return __r; 4070} 4071 4072template <class _CharT, class _Traits, class _Allocator> 4073_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4074operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) { 4075 using _String = basic_string<_CharT, _Traits, _Allocator>; 4076 typename _String::size_type __lhs_sz = __lhs.size(); 4077 _String __r(__uninitialized_size_tag(), 4078 __lhs_sz + 1, 4079 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4080 auto __ptr = std::__to_address(__r.__get_pointer()); 4081 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4082 _Traits::assign(__ptr + __lhs_sz, 1, __rhs); 4083 _Traits::assign(__ptr + 1 + __lhs_sz, 1, _CharT()); 4084 return __r; 4085} 4086 4087#ifndef _LIBCPP_CXX03_LANG 4088 4089template <class _CharT, class _Traits, class _Allocator> 4090inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4091operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4092 return std::move(__lhs.append(__rhs)); 4093} 4094 4095template <class _CharT, class _Traits, class _Allocator> 4096inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4097operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4098 return std::move(__rhs.insert(0, __lhs)); 4099} 4100 4101template <class _CharT, class _Traits, class _Allocator> 4102inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4103operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4104 return std::move(__lhs.append(__rhs)); 4105} 4106 4107template <class _CharT, class _Traits, class _Allocator> 4108inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4109operator+(const _CharT* __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4110 return std::move(__rhs.insert(0, __lhs)); 4111} 4112 4113template <class _CharT, class _Traits, class _Allocator> 4114inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4115operator+(_CharT __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4116 __rhs.insert(__rhs.begin(), __lhs); 4117 return std::move(__rhs); 4118} 4119 4120template <class _CharT, class _Traits, class _Allocator> 4121inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4122operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) { 4123 return std::move(__lhs.append(__rhs)); 4124} 4125 4126template <class _CharT, class _Traits, class _Allocator> 4127inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator> 4128operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) { 4129 __lhs.push_back(__rhs); 4130 return std::move(__lhs); 4131} 4132 4133#endif // _LIBCPP_CXX03_LANG 4134 4135#if _LIBCPP_STD_VER >= 26 4136 4137template <class _CharT, class _Traits, class _Allocator> 4138_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4139operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4140 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) { 4141 using _String = basic_string<_CharT, _Traits, _Allocator>; 4142 typename _String::size_type __lhs_sz = __lhs.size(); 4143 typename _String::size_type __rhs_sz = __rhs.size(); 4144 _String __r(__uninitialized_size_tag(), 4145 __lhs_sz + __rhs_sz, 4146 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4147 auto __ptr = std::__to_address(__r.__get_pointer()); 4148 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4149 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4150 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4151 return __r; 4152} 4153 4154template <class _CharT, class _Traits, class _Allocator> 4155_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4156operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, 4157 type_identity_t<basic_string_view<_CharT, _Traits>> __rhs) { 4158 __lhs.append(__rhs); 4159 return std::move(__lhs); 4160} 4161 4162template <class _CharT, class _Traits, class _Allocator> 4163_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4164operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, 4165 const basic_string<_CharT, _Traits, _Allocator>& __rhs) { 4166 using _String = basic_string<_CharT, _Traits, _Allocator>; 4167 typename _String::size_type __lhs_sz = __lhs.size(); 4168 typename _String::size_type __rhs_sz = __rhs.size(); 4169 _String __r(__uninitialized_size_tag(), 4170 __lhs_sz + __rhs_sz, 4171 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4172 auto __ptr = std::__to_address(__r.__get_pointer()); 4173 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4174 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4175 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4176 return __r; 4177} 4178 4179template <class _CharT, class _Traits, class _Allocator> 4180_LIBCPP_HIDE_FROM_ABI constexpr basic_string<_CharT, _Traits, _Allocator> 4181operator+(type_identity_t<basic_string_view<_CharT, _Traits>> __lhs, 4182 basic_string<_CharT, _Traits, _Allocator>&& __rhs) { 4183 __rhs.insert(0, __lhs); 4184 return std::move(__rhs); 4185} 4186 4187#endif // _LIBCPP_STD_VER >= 26 4188 4189// swap 4190 4191template <class _CharT, class _Traits, class _Allocator> 4192inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void 4193swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>& __rhs) 4194 _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) { 4195 __lhs.swap(__rhs); 4196} 4197 4198_LIBCPP_EXPORTED_FROM_ABI int stoi(const string& __str, size_t* __idx = nullptr, int __base = 10); 4199_LIBCPP_EXPORTED_FROM_ABI long stol(const string& __str, size_t* __idx = nullptr, int __base = 10); 4200_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul(const string& __str, size_t* __idx = nullptr, int __base = 10); 4201_LIBCPP_EXPORTED_FROM_ABI long long stoll(const string& __str, size_t* __idx = nullptr, int __base = 10); 4202_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const string& __str, size_t* __idx = nullptr, int __base = 10); 4203 4204_LIBCPP_EXPORTED_FROM_ABI float stof(const string& __str, size_t* __idx = nullptr); 4205_LIBCPP_EXPORTED_FROM_ABI double stod(const string& __str, size_t* __idx = nullptr); 4206_LIBCPP_EXPORTED_FROM_ABI long double stold(const string& __str, size_t* __idx = nullptr); 4207 4208_LIBCPP_EXPORTED_FROM_ABI string to_string(int __val); 4209_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned __val); 4210_LIBCPP_EXPORTED_FROM_ABI string to_string(long __val); 4211_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long __val); 4212_LIBCPP_EXPORTED_FROM_ABI string to_string(long long __val); 4213_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long long __val); 4214_LIBCPP_EXPORTED_FROM_ABI string to_string(float __val); 4215_LIBCPP_EXPORTED_FROM_ABI string to_string(double __val); 4216_LIBCPP_EXPORTED_FROM_ABI string to_string(long double __val); 4217 4218#if _LIBCPP_HAS_WIDE_CHARACTERS 4219_LIBCPP_EXPORTED_FROM_ABI int stoi(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4220_LIBCPP_EXPORTED_FROM_ABI long stol(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4221_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4222_LIBCPP_EXPORTED_FROM_ABI long long stoll(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4223_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4224 4225_LIBCPP_EXPORTED_FROM_ABI float stof(const wstring& __str, size_t* __idx = nullptr); 4226_LIBCPP_EXPORTED_FROM_ABI double stod(const wstring& __str, size_t* __idx = nullptr); 4227_LIBCPP_EXPORTED_FROM_ABI long double stold(const wstring& __str, size_t* __idx = nullptr); 4228 4229_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(int __val); 4230_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned __val); 4231_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long __val); 4232_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long __val); 4233_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long long __val); 4234_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long long __val); 4235_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(float __val); 4236_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(double __val); 4237_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long double __val); 4238#endif // _LIBCPP_HAS_WIDE_CHARACTERS 4239 4240template <class _CharT, class _Traits, class _Allocator> 4241_LIBCPP_TEMPLATE_DATA_VIS const typename basic_string<_CharT, _Traits, _Allocator>::size_type 4242 basic_string<_CharT, _Traits, _Allocator>::npos; 4243 4244template <class _CharT, class _Allocator> 4245struct __string_hash : public __unary_function<basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> { 4246 _LIBCPP_HIDE_FROM_ABI size_t 4247 operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT { 4248 return std::__do_string_hash(__val.data(), __val.data() + __val.size()); 4249 } 4250}; 4251 4252template <class _Allocator> 4253struct hash<basic_string<char, char_traits<char>, _Allocator> > : __string_hash<char, _Allocator> {}; 4254 4255#if _LIBCPP_HAS_CHAR8_T 4256template <class _Allocator> 4257struct hash<basic_string<char8_t, char_traits<char8_t>, _Allocator> > : __string_hash<char8_t, _Allocator> {}; 4258#endif 4259 4260template <class _Allocator> 4261struct hash<basic_string<char16_t, char_traits<char16_t>, _Allocator> > : __string_hash<char16_t, _Allocator> {}; 4262 4263template <class _Allocator> 4264struct hash<basic_string<char32_t, char_traits<char32_t>, _Allocator> > : __string_hash<char32_t, _Allocator> {}; 4265 4266#if _LIBCPP_HAS_WIDE_CHARACTERS 4267template <class _Allocator> 4268struct hash<basic_string<wchar_t, char_traits<wchar_t>, _Allocator> > : __string_hash<wchar_t, _Allocator> {}; 4269#endif 4270 4271template <class _CharT, class _Traits, class _Allocator> 4272_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>& 4273operator<<(basic_ostream<_CharT, _Traits>& __os, const basic_string<_CharT, _Traits, _Allocator>& __str); 4274 4275template <class _CharT, class _Traits, class _Allocator> 4276_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4277operator>>(basic_istream<_CharT, _Traits>& __is, basic_string<_CharT, _Traits, _Allocator>& __str); 4278 4279template <class _CharT, class _Traits, class _Allocator> 4280_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4281getline(basic_istream<_CharT, _Traits>& __is, basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4282 4283template <class _CharT, class _Traits, class _Allocator> 4284inline _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4285getline(basic_istream<_CharT, _Traits>& __is, basic_string<_CharT, _Traits, _Allocator>& __str); 4286 4287template <class _CharT, class _Traits, class _Allocator> 4288inline _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4289getline(basic_istream<_CharT, _Traits>&& __is, basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4290 4291template <class _CharT, class _Traits, class _Allocator> 4292inline _LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4293getline(basic_istream<_CharT, _Traits>&& __is, basic_string<_CharT, _Traits, _Allocator>& __str); 4294 4295#if _LIBCPP_STD_VER >= 20 4296template <class _CharT, class _Traits, class _Allocator, class _Up> 4297inline _LIBCPP_HIDE_FROM_ABI typename basic_string<_CharT, _Traits, _Allocator>::size_type 4298erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { 4299 auto __old_size = __str.size(); 4300 __str.erase(std::remove(__str.begin(), __str.end(), __v), __str.end()); 4301 return __old_size - __str.size(); 4302} 4303 4304template <class _CharT, class _Traits, class _Allocator, class _Predicate> 4305inline _LIBCPP_HIDE_FROM_ABI typename basic_string<_CharT, _Traits, _Allocator>::size_type 4306erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, _Predicate __pred) { 4307 auto __old_size = __str.size(); 4308 __str.erase(std::remove_if(__str.begin(), __str.end(), __pred), __str.end()); 4309 return __old_size - __str.size(); 4310} 4311#endif 4312 4313#if _LIBCPP_STD_VER >= 14 4314// Literal suffixes for basic_string [basic.string.literals] 4315inline namespace literals { 4316inline namespace string_literals { 4317inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<char> 4318operator""s(const char* __str, size_t __len) { 4319 return basic_string<char>(__str, __len); 4320} 4321 4322# if _LIBCPP_HAS_WIDE_CHARACTERS 4323inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<wchar_t> 4324operator""s(const wchar_t* __str, size_t __len) { 4325 return basic_string<wchar_t>(__str, __len); 4326} 4327# endif 4328 4329# if _LIBCPP_HAS_CHAR8_T 4330inline _LIBCPP_HIDE_FROM_ABI constexpr basic_string<char8_t> operator""s(const char8_t* __str, size_t __len) { 4331 return basic_string<char8_t>(__str, __len); 4332} 4333# endif 4334 4335inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<char16_t> 4336operator""s(const char16_t* __str, size_t __len) { 4337 return basic_string<char16_t>(__str, __len); 4338} 4339 4340inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<char32_t> 4341operator""s(const char32_t* __str, size_t __len) { 4342 return basic_string<char32_t>(__str, __len); 4343} 4344} // namespace string_literals 4345} // namespace literals 4346 4347# if _LIBCPP_STD_VER >= 20 4348template <> 4349inline constexpr bool __format::__enable_insertable<std::basic_string<char>> = true; 4350# if _LIBCPP_HAS_WIDE_CHARACTERS 4351template <> 4352inline constexpr bool __format::__enable_insertable<std::basic_string<wchar_t>> = true; 4353# endif 4354# endif 4355 4356#endif 4357 4358_LIBCPP_END_NAMESPACE_STD 4359 4360_LIBCPP_POP_MACROS 4361 4362#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 4363# include <algorithm> 4364# include <concepts> 4365# include <cstdlib> 4366# include <iterator> 4367# include <new> 4368# include <type_traits> 4369# include <typeinfo> 4370# include <utility> 4371#endif 4372 4373#endif // _LIBCPP_STRING 4374