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> 411bool operator==(const basic_string<charT, traits, Allocator>& lhs, 412 const basic_string<charT, traits, Allocator>& rhs) noexcept; // constexpr since C++20 413 414template<class charT, class traits, class Allocator> 415bool operator==(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 416 417template<class charT, class traits, class Allocator> 418bool operator==(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs) noexcept; // constexpr since C++20 419 420template<class charT, class traits, class Allocator> 421bool operator!=(const basic_string<charT,traits,Allocator>& lhs, 422 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 423 424template<class charT, class traits, class Allocator> 425bool operator!=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 426 427template<class charT, class traits, class Allocator> 428bool operator!=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 429 430template<class charT, class traits, class Allocator> 431bool operator< (const basic_string<charT, traits, Allocator>& lhs, 432 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 433 434template<class charT, class traits, class Allocator> 435bool operator< (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 436 437template<class charT, class traits, class Allocator> 438bool operator< (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 439 440template<class charT, class traits, class Allocator> 441bool operator> (const basic_string<charT, traits, Allocator>& lhs, 442 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 443 444template<class charT, class traits, class Allocator> 445bool operator> (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 446 447template<class charT, class traits, class Allocator> 448bool operator> (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 449 450template<class charT, class traits, class Allocator> 451bool operator<=(const basic_string<charT, traits, Allocator>& lhs, 452 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 453 454template<class charT, class traits, class Allocator> 455bool operator<=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 456 457template<class charT, class traits, class Allocator> 458bool operator<=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 459 460template<class charT, class traits, class Allocator> 461bool operator>=(const basic_string<charT, traits, Allocator>& lhs, 462 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 463 464template<class charT, class traits, class Allocator> 465bool operator>=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 466 467template<class charT, class traits, class Allocator> 468bool operator>=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 469 470template<class charT, class traits, class Allocator> // since C++20 471constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, 472 const basic_string<charT, traits, Allocator>& rhs) noexcept; 473 474template<class charT, class traits, class Allocator> // since C++20 475constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, 476 const charT* rhs) noexcept; 477 478template<class charT, class traits, class Allocator> 479void swap(basic_string<charT, traits, Allocator>& lhs, 480 basic_string<charT, traits, Allocator>& rhs) 481 noexcept(noexcept(lhs.swap(rhs))); // constexpr since C++20 482 483template<class charT, class traits, class Allocator> 484basic_istream<charT, traits>& 485operator>>(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 486 487template<class charT, class traits, class Allocator> 488basic_ostream<charT, traits>& 489operator<<(basic_ostream<charT, traits>& os, const basic_string<charT, traits, Allocator>& str); 490 491template<class charT, class traits, class Allocator> 492basic_istream<charT, traits>& 493getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str, 494 charT delim); 495 496template<class charT, class traits, class Allocator> 497basic_istream<charT, traits>& 498getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 499 500template<class charT, class traits, class Allocator, class U> 501typename basic_string<charT, traits, Allocator>::size_type 502erase(basic_string<charT, traits, Allocator>& c, const U& value); // C++20 503template<class charT, class traits, class Allocator, class Predicate> 504typename basic_string<charT, traits, Allocator>::size_type 505erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred); // C++20 506 507typedef basic_string<char> string; 508typedef basic_string<wchar_t> wstring; 509typedef basic_string<char8_t> u8string; // C++20 510typedef basic_string<char16_t> u16string; 511typedef basic_string<char32_t> u32string; 512 513int stoi (const string& str, size_t* idx = nullptr, int base = 10); 514long stol (const string& str, size_t* idx = nullptr, int base = 10); 515unsigned long stoul (const string& str, size_t* idx = nullptr, int base = 10); 516long long stoll (const string& str, size_t* idx = nullptr, int base = 10); 517unsigned long long stoull(const string& str, size_t* idx = nullptr, int base = 10); 518 519float stof (const string& str, size_t* idx = nullptr); 520double stod (const string& str, size_t* idx = nullptr); 521long double stold(const string& str, size_t* idx = nullptr); 522 523string to_string(int val); 524string to_string(unsigned val); 525string to_string(long val); 526string to_string(unsigned long val); 527string to_string(long long val); 528string to_string(unsigned long long val); 529string to_string(float val); 530string to_string(double val); 531string to_string(long double val); 532 533int stoi (const wstring& str, size_t* idx = nullptr, int base = 10); 534long stol (const wstring& str, size_t* idx = nullptr, int base = 10); 535unsigned long stoul (const wstring& str, size_t* idx = nullptr, int base = 10); 536long long stoll (const wstring& str, size_t* idx = nullptr, int base = 10); 537unsigned long long stoull(const wstring& str, size_t* idx = nullptr, int base = 10); 538 539float stof (const wstring& str, size_t* idx = nullptr); 540double stod (const wstring& str, size_t* idx = nullptr); 541long double stold(const wstring& str, size_t* idx = nullptr); 542 543wstring to_wstring(int val); 544wstring to_wstring(unsigned val); 545wstring to_wstring(long val); 546wstring to_wstring(unsigned long val); 547wstring to_wstring(long long val); 548wstring to_wstring(unsigned long long val); 549wstring to_wstring(float val); 550wstring to_wstring(double val); 551wstring to_wstring(long double val); 552 553template <> struct hash<string>; 554template <> struct hash<u8string>; // C++20 555template <> struct hash<u16string>; 556template <> struct hash<u32string>; 557template <> struct hash<wstring>; 558 559basic_string<char> operator""s( const char *str, size_t len ); // C++14, constexpr since C++20 560basic_string<wchar_t> operator""s( const wchar_t *str, size_t len ); // C++14, constexpr since C++20 561constexpr basic_string<char8_t> operator""s( const char8_t *str, size_t len ); // C++20 562basic_string<char16_t> operator""s( const char16_t *str, size_t len ); // C++14, constexpr since C++20 563basic_string<char32_t> operator""s( const char32_t *str, size_t len ); // C++14, constexpr since C++20 564 565} // std 566 567*/ 568 569// clang-format on 570 571#include <__algorithm/max.h> 572#include <__algorithm/min.h> 573#include <__algorithm/remove.h> 574#include <__algorithm/remove_if.h> 575#include <__assert> // all public C++ headers provide the assertion handler 576#include <__config> 577#include <__format/enable_insertable.h> 578#include <__functional/hash.h> 579#include <__functional/unary_function.h> 580#include <__fwd/string.h> 581#include <__ios/fpos.h> 582#include <__iterator/distance.h> 583#include <__iterator/iterator_traits.h> 584#include <__iterator/reverse_iterator.h> 585#include <__iterator/wrap_iter.h> 586#include <__memory/addressof.h> 587#include <__memory/allocate_at_least.h> 588#include <__memory/allocator.h> 589#include <__memory/allocator_traits.h> 590#include <__memory/compressed_pair.h> 591#include <__memory/construct_at.h> 592#include <__memory/pointer_traits.h> 593#include <__memory/swap_allocator.h> 594#include <__memory_resource/polymorphic_allocator.h> 595#include <__ranges/access.h> 596#include <__ranges/concepts.h> 597#include <__ranges/container_compatible_range.h> 598#include <__ranges/from_range.h> 599#include <__ranges/size.h> 600#include <__string/char_traits.h> 601#include <__string/extern_template_lists.h> 602#include <__type_traits/is_allocator.h> 603#include <__type_traits/is_array.h> 604#include <__type_traits/is_convertible.h> 605#include <__type_traits/is_nothrow_default_constructible.h> 606#include <__type_traits/is_nothrow_move_assignable.h> 607#include <__type_traits/is_same.h> 608#include <__type_traits/is_standard_layout.h> 609#include <__type_traits/is_trivial.h> 610#include <__type_traits/noexcept_move_assign_container.h> 611#include <__type_traits/remove_cvref.h> 612#include <__type_traits/void_t.h> 613#include <__utility/auto_cast.h> 614#include <__utility/declval.h> 615#include <__utility/forward.h> 616#include <__utility/is_pointer_in_range.h> 617#include <__utility/move.h> 618#include <__utility/swap.h> 619#include <__utility/unreachable.h> 620#include <climits> 621#include <cstdio> // EOF 622#include <cstring> 623#include <limits> 624#include <stdexcept> 625#include <string_view> 626#include <version> 627 628#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 629# include <cwchar> 630#endif 631 632// standard-mandated includes 633 634// [iterator.range] 635#include <__iterator/access.h> 636#include <__iterator/data.h> 637#include <__iterator/empty.h> 638#include <__iterator/reverse_access.h> 639#include <__iterator/size.h> 640 641// [string.syn] 642#include <compare> 643#include <initializer_list> 644 645#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 646# pragma GCC system_header 647#endif 648 649_LIBCPP_PUSH_MACROS 650#include <__undef_macros> 651 652#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 653# define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS __attribute__((__no_sanitize__("address"))) 654// This macro disables AddressSanitizer (ASan) instrumentation for a specific function, 655// allowing memory accesses that would normally trigger ASan errors to proceed without crashing. 656// This is useful for accessing parts of objects memory, which should not be accessed, 657// such as unused bytes in short strings, that should never be accessed 658// by other parts of the program. 659#else 660# define _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 661#endif 662#define _LIBCPP_SHORT_STRING_ANNOTATIONS_ALLOWED false 663 664_LIBCPP_BEGIN_NAMESPACE_STD 665 666// basic_string 667 668template<class _CharT, class _Traits, class _Allocator> 669basic_string<_CharT, _Traits, _Allocator> 670_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 671operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, 672 const basic_string<_CharT, _Traits, _Allocator>& __y); 673 674template<class _CharT, class _Traits, class _Allocator> 675_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 676basic_string<_CharT, _Traits, _Allocator> 677operator+(const _CharT* __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 678 679template<class _CharT, class _Traits, class _Allocator> 680_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 681basic_string<_CharT, _Traits, _Allocator> 682operator+(_CharT __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 683 684template<class _CharT, class _Traits, class _Allocator> 685inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 686basic_string<_CharT, _Traits, _Allocator> 687operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); 688 689template<class _CharT, class _Traits, class _Allocator> 690_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 691basic_string<_CharT, _Traits, _Allocator> 692operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); 693 694extern template _LIBCPP_EXPORTED_FROM_ABI string operator+ 695 <char, char_traits<char>, allocator<char> >(char const*, string const&); 696 697template <class _Iter> 698struct __string_is_trivial_iterator : public false_type {}; 699 700template <class _Tp> 701struct __string_is_trivial_iterator<_Tp*> 702 : public is_arithmetic<_Tp> {}; 703 704template <class _Iter> 705struct __string_is_trivial_iterator<__wrap_iter<_Iter> > 706 : public __string_is_trivial_iterator<_Iter> {}; 707 708template <class _CharT, class _Traits, class _Tp> 709struct __can_be_converted_to_string_view : public _BoolConstant< 710 is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && 711 !is_convertible<const _Tp&, const _CharT*>::value 712 > {}; 713 714struct __uninitialized_size_tag {}; 715struct __init_with_sentinel_tag {}; 716 717template<class _CharT, class _Traits, class _Allocator> 718class basic_string 719{ 720private: 721 using __default_allocator_type = allocator<_CharT>; 722 723public: 724 typedef basic_string __self; 725 typedef basic_string_view<_CharT, _Traits> __self_view; 726 typedef _Traits traits_type; 727 typedef _CharT value_type; 728 typedef _Allocator allocator_type; 729 typedef allocator_traits<allocator_type> __alloc_traits; 730 typedef typename __alloc_traits::size_type size_type; 731 typedef typename __alloc_traits::difference_type difference_type; 732 typedef value_type& reference; 733 typedef const value_type& const_reference; 734 typedef typename __alloc_traits::pointer pointer; 735 typedef typename __alloc_traits::const_pointer const_pointer; 736 737 static_assert((!is_array<value_type>::value), "Character type of basic_string must not be an array"); 738 static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string must be standard-layout"); 739 static_assert(( is_trivial<value_type>::value), "Character type of basic_string must be trivial"); 740 static_assert(( is_same<_CharT, typename traits_type::char_type>::value), 741 "traits_type::char_type must be the same type as CharT"); 742 static_assert(( is_same<typename allocator_type::value_type, value_type>::value), 743 "Allocator::value_type must be same type as value_type"); 744 745 static_assert(is_same<allocator_type, __rebind_alloc<__alloc_traits, value_type> >::value, 746 "[allocator.requirements] states that rebinding an allocator to the same type should result in the " 747 "original allocator"); 748 749 // TODO: Implement iterator bounds checking without requiring the global database. 750 typedef __wrap_iter<pointer> iterator; 751 typedef __wrap_iter<const_pointer> const_iterator; 752 typedef std::reverse_iterator<iterator> reverse_iterator; 753 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 754 755private: 756 static_assert(CHAR_BIT == 8, "This implementation assumes that one byte contains 8 bits"); 757 758#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 759 760 struct __long 761 { 762 pointer __data_; 763 size_type __size_; 764 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 765 size_type __is_long_ : 1; 766 }; 767 768 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 769 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 770 771 struct __short 772 { 773 value_type __data_[__min_cap]; 774 unsigned char __padding_[sizeof(value_type) - 1]; 775 unsigned char __size_ : 7; 776 unsigned char __is_long_ : 1; 777 }; 778 779// The __endian_factor is required because the field we use to store the size 780// has one fewer bit than it would if it were not a bitfield. 781// 782// If the LSB is used to store the short-flag in the short string representation, 783// we have to multiply the size by two when it is stored and divide it by two when 784// it is loaded to make sure that we always store an even number. In the long string 785// representation, we can ignore this because we can assume that we always allocate 786// an even amount of value_types. 787// 788// If the MSB is used for the short-flag, the max_size() is numeric_limits<size_type>::max() / 2. 789// This does not impact the short string representation, since we never need the MSB 790// for representing the size of a short string anyway. 791 792#ifdef _LIBCPP_BIG_ENDIAN 793 static const size_type __endian_factor = 2; 794#else 795 static const size_type __endian_factor = 1; 796#endif 797 798#else // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 799 800#ifdef _LIBCPP_BIG_ENDIAN 801 static const size_type __endian_factor = 1; 802#else 803 static const size_type __endian_factor = 2; 804#endif 805 806 // Attribute 'packed' is used to keep the layout compatible with the 807 // previous definition that did not use bit fields. This is because on 808 // some platforms bit fields have a default size rather than the actual 809 // size used, e.g., it is 4 bytes on AIX. See D128285 for details. 810 struct __long 811 { 812 struct _LIBCPP_PACKED { 813 size_type __is_long_ : 1; 814 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 815 }; 816 size_type __size_; 817 pointer __data_; 818 }; 819 820 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 821 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 822 823 struct __short 824 { 825 struct _LIBCPP_PACKED { 826 unsigned char __is_long_ : 1; 827 unsigned char __size_ : 7; 828 }; 829 char __padding_[sizeof(value_type) - 1]; 830 value_type __data_[__min_cap]; 831 }; 832 833#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 834 835 static_assert(sizeof(__short) == (sizeof(value_type) * (__min_cap + 1)), "__short has an unexpected size."); 836 837 union __ulx{__long __lx; __short __lxx;}; 838 839 enum {__n_words = sizeof(__ulx) / sizeof(size_type)}; 840 841 struct __raw 842 { 843 size_type __words[__n_words]; 844 }; 845 846 struct __rep 847 { 848 union 849 { 850 __short __s; 851 __long __l; 852 __raw __r; 853 }; 854 }; 855 856 __compressed_pair<__rep, allocator_type> __r_; 857 858 // Construct a string with the given allocator and enough storage to hold `__size` characters, but 859 // don't initialize the characters. The contents of the string, including the null terminator, must be 860 // initialized separately. 861 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 862 explicit basic_string(__uninitialized_size_tag, size_type __size, const allocator_type& __a) 863 : __r_(__default_init_tag(), __a) { 864 if (__size > max_size()) 865 __throw_length_error(); 866 if (__fits_in_sso(__size)) { 867 __r_.first() = __rep(); 868 __set_short_size(__size); 869 } else { 870 auto __capacity = __recommend(__size) + 1; 871 auto __allocation = __alloc_traits::allocate(__alloc(), __capacity); 872 __begin_lifetime(__allocation, __capacity); 873 __set_long_cap(__capacity); 874 __set_long_pointer(__allocation); 875 __set_long_size(__size); 876 } 877 __annotate_new(__size); 878 } 879 880 template <class _Iter, class _Sent> 881 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 882 basic_string(__init_with_sentinel_tag, _Iter __first, _Sent __last, const allocator_type& __a) 883 : __r_(__default_init_tag(), __a) { 884 __init_with_sentinel(std::move(__first), std::move(__last)); 885 } 886 887 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator __make_iterator(pointer __p) { 888 return iterator(__p); 889 } 890 891 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator __make_const_iterator(const_pointer __p) const { 892 return const_iterator(__p); 893 } 894 895public: 896 _LIBCPP_TEMPLATE_DATA_VIS static const size_type npos = -1; 897 898 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string() 899 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value) 900 : __r_(__value_init_tag(), __default_init_tag()) { 901 __annotate_new(0); 902 } 903 904 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const allocator_type& __a) 905#if _LIBCPP_STD_VER <= 14 906 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value) 907#else 908 _NOEXCEPT 909#endif 910 : __r_(__value_init_tag(), __a) { 911 __annotate_new(0); 912 } 913 914 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string(const basic_string& __str) 915 : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) { 916 if (!__str.__is_long()) 917 { 918 __r_.first() = __str.__r_.first(); 919 __annotate_new(__get_short_size()); 920 } 921 else 922 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 923 } 924 925 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string(const basic_string& __str, const allocator_type& __a) 926 : __r_(__default_init_tag(), __a) { 927 if (!__str.__is_long()) 928 { 929 __r_.first() = __str.__r_.first(); 930 __annotate_new(__get_short_size()); 931 } 932 else 933 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 934 } 935 936#ifndef _LIBCPP_CXX03_LANG 937 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 938 basic_string(basic_string&& __str) 939# if _LIBCPP_STD_VER <= 14 940 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value) 941# else 942 _NOEXCEPT 943# endif 944 // Turning off ASan instrumentation for variable initialization with _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 945 // does not work consistently during initialization of __r_, so we instead unpoison __str's memory manually first. 946 // __str's memory needs to be unpoisoned only in the case where it's a short string. 947 : __r_( ( (__str.__is_long() ? 0 : (__str.__annotate_delete(), 0)), std::move(__str.__r_)) ) { 948 __str.__r_.first() = __rep(); 949 __str.__annotate_new(0); 950 if(!__is_long()) 951 __annotate_new(size()); 952 } 953 954 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 955 basic_string(basic_string&& __str, const allocator_type& __a) 956 : __r_(__default_init_tag(), __a) { 957 if (__str.__is_long() && __a != __str.__alloc()) // copy, not move 958 __init(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 959 else { 960 if (__libcpp_is_constant_evaluated()) 961 __r_.first() = __rep(); 962 if (!__str.__is_long()) 963 __str.__annotate_delete(); 964 __r_.first() = __str.__r_.first(); 965 __str.__r_.first() = __rep(); 966 __str.__annotate_new(0); 967 if(!__is_long() && this != &__str) 968 __annotate_new(size()); 969 } 970 } 971#endif // _LIBCPP_CXX03_LANG 972 973 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 974 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s) 975 : __r_(__default_init_tag(), __default_init_tag()) { 976 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "basic_string(const char*) detected nullptr"); 977 __init(__s, traits_type::length(__s)); 978 } 979 980 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 981 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, const _Allocator& __a) 982 : __r_(__default_init_tag(), __a) { 983 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); 984 __init(__s, traits_type::length(__s)); 985 } 986 987#if _LIBCPP_STD_VER >= 23 988 basic_string(nullptr_t) = delete; 989#endif 990 991 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, size_type __n) 992 : __r_(__default_init_tag(), __default_init_tag()) { 993 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); 994 __init(__s, __n); 995 } 996 997 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 998 basic_string(const _CharT* __s, size_type __n, const _Allocator& __a) 999 : __r_(__default_init_tag(), __a) { 1000 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "basic_string(const char*, n, allocator) detected nullptr"); 1001 __init(__s, __n); 1002 } 1003 1004 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c) 1005 : __r_(__default_init_tag(), __default_init_tag()) { 1006 __init(__n, __c); 1007 } 1008 1009#if _LIBCPP_STD_VER >= 23 1010 _LIBCPP_HIDE_FROM_ABI constexpr 1011 basic_string(basic_string&& __str, size_type __pos, const _Allocator& __alloc = _Allocator()) 1012 : basic_string(std::move(__str), __pos, npos, __alloc) {} 1013 1014 _LIBCPP_HIDE_FROM_ABI constexpr 1015 basic_string(basic_string&& __str, size_type __pos, size_type __n, const _Allocator& __alloc = _Allocator()) 1016 : __r_(__default_init_tag(), __alloc) { 1017 if (__pos > __str.size()) 1018 __throw_out_of_range(); 1019 1020 auto __len = std::min<size_type>(__n, __str.size() - __pos); 1021 if (__alloc_traits::is_always_equal::value || __alloc == __str.__alloc()) { 1022 __move_assign(std::move(__str), __pos, __len); 1023 } else { 1024 // Perform a copy because the allocators are not compatible. 1025 __init(__str.data() + __pos, __len); 1026 } 1027 } 1028#endif 1029 1030 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 1031 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c, const _Allocator& __a) 1032 : __r_(__default_init_tag(), __a) { 1033 __init(__n, __c); 1034 } 1035 1036 _LIBCPP_CONSTEXPR_SINCE_CXX20 1037 basic_string(const basic_string& __str, size_type __pos, size_type __n, const _Allocator& __a = _Allocator()) 1038 : __r_(__default_init_tag(), __a) { 1039 size_type __str_sz = __str.size(); 1040 if (__pos > __str_sz) 1041 __throw_out_of_range(); 1042 __init(__str.data() + __pos, std::min(__n, __str_sz - __pos)); 1043 } 1044 1045 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1046 basic_string(const basic_string& __str, size_type __pos, const _Allocator& __a = _Allocator()) 1047 : __r_(__default_init_tag(), __a) { 1048 size_type __str_sz = __str.size(); 1049 if (__pos > __str_sz) 1050 __throw_out_of_range(); 1051 __init(__str.data() + __pos, __str_sz - __pos); 1052 } 1053 1054 template <class _Tp, 1055 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1056 !__is_same_uncvref<_Tp, basic_string>::value, 1057 int> = 0> 1058 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1059 basic_string(const _Tp& __t, size_type __pos, size_type __n, const allocator_type& __a = allocator_type()) 1060 : __r_(__default_init_tag(), __a) { 1061 __self_view __sv0 = __t; 1062 __self_view __sv = __sv0.substr(__pos, __n); 1063 __init(__sv.data(), __sv.size()); 1064 } 1065 1066 template <class _Tp, 1067 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1068 !__is_same_uncvref<_Tp, basic_string>::value, 1069 int> = 0> 1070 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const _Tp& __t) 1071 : __r_(__default_init_tag(), __default_init_tag()) { 1072 __self_view __sv = __t; 1073 __init(__sv.data(), __sv.size()); 1074 } 1075 1076 template <class _Tp, 1077 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1078 !__is_same_uncvref<_Tp, basic_string>::value, 1079 int> = 0> 1080 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string( 1081 const _Tp& __t, const allocator_type& __a) 1082 : __r_(__default_init_tag(), __a) { 1083 __self_view __sv = __t; 1084 __init(__sv.data(), __sv.size()); 1085 } 1086 1087 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1088 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(_InputIterator __first, _InputIterator __last) 1089 : __r_(__default_init_tag(), __default_init_tag()) { 1090 __init(__first, __last); 1091 } 1092 1093 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1094 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1095 basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a) 1096 : __r_(__default_init_tag(), __a) { 1097 __init(__first, __last); 1098 } 1099 1100#if _LIBCPP_STD_VER >= 23 1101 template <_ContainerCompatibleRange<_CharT> _Range> 1102 _LIBCPP_HIDE_FROM_ABI constexpr 1103 basic_string(from_range_t, _Range&& __range, const allocator_type& __a = allocator_type()) 1104 : __r_(__default_init_tag(), __a) { 1105 if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { 1106 __init_with_size(ranges::begin(__range), ranges::end(__range), ranges::distance(__range)); 1107 } else { 1108 __init_with_sentinel(ranges::begin(__range), ranges::end(__range)); 1109 } 1110 } 1111#endif 1112 1113#ifndef _LIBCPP_CXX03_LANG 1114 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il) 1115 : __r_(__default_init_tag(), __default_init_tag()) { 1116 __init(__il.begin(), __il.end()); 1117 } 1118 1119 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il, const _Allocator& __a) 1120 : __r_(__default_init_tag(), __a) { 1121 __init(__il.begin(), __il.end()); 1122 } 1123#endif // _LIBCPP_CXX03_LANG 1124 1125 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 ~basic_string() { 1126 __annotate_delete(); 1127 if (__is_long()) 1128 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 1129 } 1130 1131 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1132 operator __self_view() const _NOEXCEPT { return __self_view(data(), size()); } 1133 1134 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string& operator=(const basic_string& __str); 1135 1136 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1137 !__is_same_uncvref<_Tp, basic_string>::value, int> = 0> 1138 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const _Tp& __t) { 1139 __self_view __sv = __t; 1140 return assign(__sv); 1141 } 1142 1143#ifndef _LIBCPP_CXX03_LANG 1144 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1145 operator=(basic_string&& __str) _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) { 1146 __move_assign(__str, integral_constant<bool, __alloc_traits::propagate_on_container_move_assignment::value>()); 1147 return *this; 1148 } 1149 1150 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1151 basic_string& operator=(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 1152#endif 1153 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1154 basic_string& operator=(const value_type* __s) {return assign(__s);} 1155#if _LIBCPP_STD_VER >= 23 1156 basic_string& operator=(nullptr_t) = delete; 1157#endif 1158 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS basic_string& operator=(value_type __c); 1159 1160 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1161 iterator begin() _NOEXCEPT 1162 {return __make_iterator(__get_pointer());} 1163 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1164 const_iterator begin() const _NOEXCEPT 1165 {return __make_const_iterator(__get_pointer());} 1166 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1167 iterator end() _NOEXCEPT 1168 {return __make_iterator(__get_pointer() + size());} 1169 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1170 const_iterator end() const _NOEXCEPT 1171 {return __make_const_iterator(__get_pointer() + size());} 1172 1173 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1174 reverse_iterator rbegin() _NOEXCEPT 1175 {return reverse_iterator(end());} 1176 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1177 const_reverse_iterator rbegin() const _NOEXCEPT 1178 {return const_reverse_iterator(end());} 1179 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1180 reverse_iterator rend() _NOEXCEPT 1181 {return reverse_iterator(begin());} 1182 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1183 const_reverse_iterator rend() const _NOEXCEPT 1184 {return const_reverse_iterator(begin());} 1185 1186 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1187 const_iterator cbegin() const _NOEXCEPT 1188 {return begin();} 1189 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1190 const_iterator cend() const _NOEXCEPT 1191 {return end();} 1192 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1193 const_reverse_iterator crbegin() const _NOEXCEPT 1194 {return rbegin();} 1195 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1196 const_reverse_iterator crend() const _NOEXCEPT 1197 {return rend();} 1198 1199 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type size() const _NOEXCEPT 1200 {return __is_long() ? __get_long_size() : __get_short_size();} 1201 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type length() const _NOEXCEPT {return size();} 1202 1203 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type max_size() const _NOEXCEPT { 1204 size_type __m = __alloc_traits::max_size(__alloc()); 1205 if (__m <= std::numeric_limits<size_type>::max() / 2) { 1206 return __m - __alignment; 1207 } else { 1208 bool __uses_lsb = __endian_factor == 2; 1209 return __uses_lsb ? __m - __alignment : (__m / 2) - __alignment; 1210 } 1211 } 1212 1213 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type capacity() const _NOEXCEPT { 1214 return (__is_long() ? __get_long_cap() : static_cast<size_type>(__min_cap)) - 1; 1215 } 1216 1217 _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n, value_type __c); 1218 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n) { resize(__n, value_type()); } 1219 1220 _LIBCPP_CONSTEXPR_SINCE_CXX20 void reserve(size_type __requested_capacity); 1221 1222#if _LIBCPP_STD_VER >= 23 1223 template <class _Op> 1224 _LIBCPP_HIDE_FROM_ABI constexpr 1225 void resize_and_overwrite(size_type __n, _Op __op) { 1226 __resize_default_init(__n); 1227 __erase_to_end(std::move(__op)(data(), _LIBCPP_AUTO_CAST(__n))); 1228 } 1229#endif 1230 1231 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __resize_default_init(size_type __n); 1232 1233#if _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRING_RESERVE) 1234 _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_HIDE_FROM_ABI void reserve() _NOEXCEPT { shrink_to_fit(); } 1235#endif 1236 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void shrink_to_fit() _NOEXCEPT; 1237 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void clear() _NOEXCEPT; 1238 1239 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1240 bool empty() const _NOEXCEPT {return size() == 0;} 1241 1242 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference operator[](size_type __pos) const _NOEXCEPT { 1243 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); 1244 if (__builtin_constant_p(__pos) && !__fits_in_sso(__pos)) { 1245 return *(__get_long_pointer() + __pos); 1246 } 1247 return *(data() + __pos); 1248 } 1249 1250 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator[](size_type __pos) _NOEXCEPT { 1251 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(__pos <= size(), "string index out of bounds"); 1252 if (__builtin_constant_p(__pos) && !__fits_in_sso(__pos)) { 1253 return *(__get_long_pointer() + __pos); 1254 } 1255 return *(__get_pointer() + __pos); 1256 } 1257 1258 _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference at(size_type __n) const; 1259 _LIBCPP_CONSTEXPR_SINCE_CXX20 reference at(size_type __n); 1260 1261 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const basic_string& __str) { 1262 return append(__str); 1263 } 1264 1265 template <class _Tp, 1266 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1267 !__is_same_uncvref<_Tp, basic_string >::value, 1268 int> = 0> 1269 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1270 operator+=(const _Tp& __t) { 1271 __self_view __sv = __t; return append(__sv); 1272 } 1273 1274 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const value_type* __s) { 1275 return append(__s); 1276 } 1277 1278 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(value_type __c) { 1279 push_back(__c); 1280 return *this; 1281 } 1282 1283#ifndef _LIBCPP_CXX03_LANG 1284 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1285 basic_string& operator+=(initializer_list<value_type> __il) { return append(__il); } 1286#endif // _LIBCPP_CXX03_LANG 1287 1288 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str) { 1289 return append(__str.data(), __str.size()); 1290 } 1291 1292 template <class _Tp, 1293 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1294 !__is_same_uncvref<_Tp, basic_string>::value, 1295 int> = 0> 1296 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1297 append(const _Tp& __t) { 1298 __self_view __sv = __t; 1299 return append(__sv.data(), __sv.size()); 1300 } 1301 1302 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str, size_type __pos, size_type __n=npos); 1303 1304 template <class _Tp, 1305 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1306 !__is_same_uncvref<_Tp, basic_string>::value, 1307 int> = 0> 1308 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1309 1310 basic_string& 1311 append(const _Tp& __t, size_type __pos, size_type __n = npos); 1312 1313 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s, size_type __n); 1314 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s); 1315 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(size_type __n, value_type __c); 1316 1317 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1318 void __append_default_init(size_type __n); 1319 1320 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1321 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1322 append(_InputIterator __first, _InputIterator __last) { 1323 const basic_string __temp(__first, __last, __alloc()); 1324 append(__temp.data(), __temp.size()); 1325 return *this; 1326 } 1327 1328 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1329 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1330 append(_ForwardIterator __first, _ForwardIterator __last); 1331 1332#if _LIBCPP_STD_VER >= 23 1333 template <_ContainerCompatibleRange<_CharT> _Range> 1334 _LIBCPP_HIDE_FROM_ABI 1335 constexpr basic_string& append_range(_Range&& __range) { 1336 insert_range(end(), std::forward<_Range>(__range)); 1337 return *this; 1338 } 1339#endif 1340 1341#ifndef _LIBCPP_CXX03_LANG 1342 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1343 basic_string& append(initializer_list<value_type> __il) {return append(__il.begin(), __il.size());} 1344#endif // _LIBCPP_CXX03_LANG 1345 1346 _LIBCPP_CONSTEXPR_SINCE_CXX20 void push_back(value_type __c); 1347 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void pop_back(); 1348 1349 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference front() _NOEXCEPT { 1350 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); 1351 return *__get_pointer(); 1352 } 1353 1354 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference front() const _NOEXCEPT { 1355 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::front(): string is empty"); 1356 return *data(); 1357 } 1358 1359 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference back() _NOEXCEPT { 1360 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); 1361 return *(__get_pointer() + size() - 1); 1362 } 1363 1364 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference back() const _NOEXCEPT { 1365 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::back(): string is empty"); 1366 return *(data() + size() - 1); 1367 } 1368 1369 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1370 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1371 assign(const _Tp& __t) { 1372 __self_view __sv = __t; 1373 return assign(__sv.data(), __sv.size()); 1374 } 1375 1376#if _LIBCPP_STD_VER >= 20 1377 _LIBCPP_HIDE_FROM_ABI constexpr 1378 void __move_assign(basic_string&& __str, size_type __pos, size_type __len) { 1379 // Pilfer the allocation from __str. 1380 _LIBCPP_ASSERT_INTERNAL(__alloc() == __str.__alloc(), "__move_assign called with wrong allocator"); 1381 size_type __old_sz = __str.size(); 1382 if (!__str.__is_long()) 1383 __str.__annotate_delete(); 1384 __r_.first() = __str.__r_.first(); 1385 __str.__r_.first() = __rep(); 1386 __str.__annotate_new(0); 1387 1388 _Traits::move(data(), data() + __pos, __len); 1389 __set_size(__len); 1390 _Traits::assign(data()[__len], value_type()); 1391 1392 if (!__is_long()) { 1393 __annotate_new(__len); 1394 } else if(__old_sz > __len) { 1395 __annotate_shrink(__old_sz); 1396 } 1397 } 1398#endif 1399 1400 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1401 basic_string& assign(const basic_string& __str) { return *this = __str; } 1402#ifndef _LIBCPP_CXX03_LANG 1403 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1404 basic_string& assign(basic_string&& __str) 1405 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) 1406 {*this = std::move(__str); return *this;} 1407#endif 1408 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n=npos); 1409 1410 template <class _Tp, 1411 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1412 !__is_same_uncvref<_Tp, basic_string>::value, 1413 int> = 0> 1414 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1415 assign(const _Tp& __t, size_type __pos, size_type __n = npos); 1416 1417 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s, size_type __n); 1418 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s); 1419 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(size_type __n, value_type __c); 1420 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1421 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1422 assign(_InputIterator __first, _InputIterator __last); 1423 1424 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1425 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1426 assign(_ForwardIterator __first, _ForwardIterator __last); 1427 1428#if _LIBCPP_STD_VER >= 23 1429 template <_ContainerCompatibleRange<_CharT> _Range> 1430 _LIBCPP_HIDE_FROM_ABI 1431 constexpr basic_string& assign_range(_Range&& __range) { 1432 if constexpr (__string_is_trivial_iterator<ranges::iterator_t<_Range>>::value && 1433 (ranges::forward_range<_Range> || ranges::sized_range<_Range>)) { 1434 size_type __n = static_cast<size_type>(ranges::distance(__range)); 1435 __assign_trivial(ranges::begin(__range), ranges::end(__range), __n); 1436 1437 } else { 1438 __assign_with_sentinel(ranges::begin(__range), ranges::end(__range)); 1439 } 1440 1441 return *this; 1442 } 1443#endif 1444 1445#ifndef _LIBCPP_CXX03_LANG 1446 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1447 basic_string& assign(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 1448#endif // _LIBCPP_CXX03_LANG 1449 1450 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1451 insert(size_type __pos1, const basic_string& __str) { 1452 return insert(__pos1, __str.data(), __str.size()); 1453 } 1454 1455 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1456 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1457 insert(size_type __pos1, const _Tp& __t) { 1458 __self_view __sv = __t; 1459 return insert(__pos1, __sv.data(), __sv.size()); 1460 } 1461 1462 template <class _Tp, 1463 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1464 !__is_same_uncvref<_Tp, basic_string>::value, 1465 int> = 0> 1466 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1467 insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n = npos); 1468 1469 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1470 insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n = npos); 1471 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); 1472 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s); 1473 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, size_type __n, value_type __c); 1474 _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator insert(const_iterator __pos, value_type __c); 1475 1476#if _LIBCPP_STD_VER >= 23 1477 template <_ContainerCompatibleRange<_CharT> _Range> 1478 _LIBCPP_HIDE_FROM_ABI 1479 constexpr iterator insert_range(const_iterator __position, _Range&& __range) { 1480 if constexpr (ranges::forward_range<_Range> || ranges::sized_range<_Range>) { 1481 auto __n = static_cast<size_type>(ranges::distance(__range)); 1482 return __insert_with_size(__position, ranges::begin(__range), ranges::end(__range), __n); 1483 1484 } else { 1485 basic_string __temp(from_range, std::forward<_Range>(__range), __alloc()); 1486 return insert(__position, __temp.data(), __temp.data() + __temp.size()); 1487 } 1488 } 1489#endif 1490 1491 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1492 insert(const_iterator __pos, size_type __n, value_type __c) { 1493 difference_type __p = __pos - begin(); 1494 insert(static_cast<size_type>(__p), __n, __c); 1495 return begin() + __p; 1496 } 1497 1498 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1499 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1500 insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); 1501 1502 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 1503 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1504 insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); 1505 1506#ifndef _LIBCPP_CXX03_LANG 1507 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1508 iterator insert(const_iterator __pos, initializer_list<value_type> __il) 1509 {return insert(__pos, __il.begin(), __il.end());} 1510#endif // _LIBCPP_CXX03_LANG 1511 1512 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& erase(size_type __pos = 0, size_type __n = npos); 1513 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1514 iterator erase(const_iterator __pos); 1515 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1516 iterator erase(const_iterator __first, const_iterator __last); 1517 1518 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1519 replace(size_type __pos1, size_type __n1, const basic_string& __str) { 1520 return replace(__pos1, __n1, __str.data(), __str.size()); 1521 } 1522 1523 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1524 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1525 replace(size_type __pos1, size_type __n1, const _Tp& __t) { 1526 __self_view __sv = __t; 1527 return replace(__pos1, __n1, __sv.data(), __sv.size()); 1528 } 1529 1530 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1531 replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2 = npos); 1532 1533 template <class _Tp, 1534 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1535 !__is_same_uncvref<_Tp, basic_string>::value, 1536 int> = 0> 1537 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1538 replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos); 1539 1540 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1541 replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); 1542 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); 1543 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); 1544 1545 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1546 replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) { 1547 return replace( 1548 static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __str.data(), __str.size()); 1549 } 1550 1551 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1552 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1553 replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { 1554 __self_view __sv = __t; 1555 return replace(__i1 - begin(), __i2 - __i1, __sv); 1556 } 1557 1558 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1559 replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) { 1560 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); 1561 } 1562 1563 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1564 replace(const_iterator __i1, const_iterator __i2, const value_type* __s) { 1565 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); 1566 } 1567 1568 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1569 replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) { 1570 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); 1571 } 1572 1573 template <class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> = 0> 1574 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1575 replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); 1576 1577#if _LIBCPP_STD_VER >= 23 1578 template <_ContainerCompatibleRange<_CharT> _Range> 1579 _LIBCPP_HIDE_FROM_ABI 1580 constexpr basic_string& replace_with_range(const_iterator __i1, const_iterator __i2, _Range&& __range) { 1581 basic_string __temp(from_range, std::forward<_Range>(__range), __alloc()); 1582 return replace(__i1, __i2, __temp); 1583 } 1584#endif 1585 1586#ifndef _LIBCPP_CXX03_LANG 1587 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1588 basic_string& replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) 1589 {return replace(__i1, __i2, __il.begin(), __il.end());} 1590#endif // _LIBCPP_CXX03_LANG 1591 1592 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; 1593 1594#if _LIBCPP_STD_VER <= 20 1595 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1596 basic_string substr(size_type __pos = 0, size_type __n = npos) const { 1597 return basic_string(*this, __pos, __n); 1598 } 1599#else 1600 _LIBCPP_HIDE_FROM_ABI constexpr 1601 basic_string substr(size_type __pos = 0, size_type __n = npos) const& { 1602 return basic_string(*this, __pos, __n); 1603 } 1604 1605 _LIBCPP_HIDE_FROM_ABI constexpr 1606 basic_string substr(size_type __pos = 0, size_type __n = npos) && { 1607 return basic_string(std::move(*this), __pos, __n); 1608 } 1609#endif 1610 1611 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1612 void swap(basic_string& __str) 1613#if _LIBCPP_STD_VER >= 14 1614 _NOEXCEPT; 1615#else 1616 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 1617 __is_nothrow_swappable<allocator_type>::value); 1618#endif 1619 1620 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1621 const value_type* c_str() const _NOEXCEPT {return data();} 1622 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1623 const value_type* data() const _NOEXCEPT {return std::__to_address(__get_pointer());} 1624#if _LIBCPP_STD_VER >= 17 1625 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1626 value_type* data() _NOEXCEPT {return std::__to_address(__get_pointer());} 1627#endif 1628 1629 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1630 allocator_type get_allocator() const _NOEXCEPT {return __alloc();} 1631 1632 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1633 size_type find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1634 1635 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1636 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1637 find(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1638 1639 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1640 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1641 size_type find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1642 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1643 1644 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1645 size_type rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1646 1647 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1648 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1649 rfind(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1650 1651 _LIBCPP_CONSTEXPR_SINCE_CXX20 1652 size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1653 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1654 size_type rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1655 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1656 1657 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1658 size_type find_first_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1659 1660 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1661 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1662 find_first_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1663 1664 _LIBCPP_CONSTEXPR_SINCE_CXX20 1665 size_type find_first_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1666 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1667 size_type find_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1668 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1669 size_type find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1670 1671 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1672 size_type find_last_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1673 1674 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1675 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1676 find_last_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1677 1678 _LIBCPP_CONSTEXPR_SINCE_CXX20 1679 size_type find_last_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1680 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1681 size_type find_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1682 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1683 size_type find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1684 1685 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1686 size_type find_first_not_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1687 1688 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1689 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1690 find_first_not_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1691 1692 _LIBCPP_CONSTEXPR_SINCE_CXX20 1693 size_type find_first_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1694 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1695 size_type find_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1696 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1697 size_type find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1698 1699 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1700 size_type find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1701 1702 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1703 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1704 find_last_not_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1705 1706 _LIBCPP_CONSTEXPR_SINCE_CXX20 1707 size_type find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1708 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1709 size_type find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1710 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1711 size_type find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1712 1713 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1714 int compare(const basic_string& __str) const _NOEXCEPT; 1715 1716 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1717 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1718 compare(const _Tp& __t) const _NOEXCEPT; 1719 1720 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1721 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1722 compare(size_type __pos1, size_type __n1, const _Tp& __t) const; 1723 1724 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1725 int compare(size_type __pos1, size_type __n1, const basic_string& __str) const; 1726 _LIBCPP_CONSTEXPR_SINCE_CXX20 1727 int compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, 1728 size_type __n2 = npos) const; 1729 1730 template <class _Tp, 1731 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1732 !__is_same_uncvref<_Tp, basic_string>::value, 1733 int> = 0> 1734 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1735 compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos) const; 1736 1737 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(const value_type* __s) const _NOEXCEPT; 1738 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; 1739 _LIBCPP_CONSTEXPR_SINCE_CXX20 1740 int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; 1741 1742#if _LIBCPP_STD_VER >= 20 1743 constexpr _LIBCPP_HIDE_FROM_ABI 1744 bool starts_with(__self_view __sv) const noexcept 1745 { return __self_view(data(), size()).starts_with(__sv); } 1746 1747 constexpr _LIBCPP_HIDE_FROM_ABI 1748 bool starts_with(value_type __c) const noexcept 1749 { return !empty() && _Traits::eq(front(), __c); } 1750 1751 constexpr _LIBCPP_HIDE_FROM_ABI 1752 bool starts_with(const value_type* __s) const noexcept 1753 { return starts_with(__self_view(__s)); } 1754 1755 constexpr _LIBCPP_HIDE_FROM_ABI 1756 bool ends_with(__self_view __sv) const noexcept 1757 { return __self_view(data(), size()).ends_with( __sv); } 1758 1759 constexpr _LIBCPP_HIDE_FROM_ABI 1760 bool ends_with(value_type __c) const noexcept 1761 { return !empty() && _Traits::eq(back(), __c); } 1762 1763 constexpr _LIBCPP_HIDE_FROM_ABI 1764 bool ends_with(const value_type* __s) const noexcept 1765 { return ends_with(__self_view(__s)); } 1766#endif 1767 1768#if _LIBCPP_STD_VER >= 23 1769 constexpr _LIBCPP_HIDE_FROM_ABI 1770 bool contains(__self_view __sv) const noexcept 1771 { return __self_view(data(), size()).contains(__sv); } 1772 1773 constexpr _LIBCPP_HIDE_FROM_ABI 1774 bool contains(value_type __c) const noexcept 1775 { return __self_view(data(), size()).contains(__c); } 1776 1777 constexpr _LIBCPP_HIDE_FROM_ABI 1778 bool contains(const value_type* __s) const 1779 { return __self_view(data(), size()).contains(__s); } 1780#endif 1781 1782 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __invariants() const; 1783 1784 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __clear_and_shrink() _NOEXCEPT; 1785 1786private: 1787 template<class _Alloc> 1788 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1789 bool friend operator==(const basic_string<char, char_traits<char>, _Alloc>& __lhs, 1790 const basic_string<char, char_traits<char>, _Alloc>& __rhs) _NOEXCEPT; 1791 1792 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __shrink_or_extend(size_type __target_capacity); 1793 1794 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 1795 bool __is_long() const _NOEXCEPT { 1796 if (__libcpp_is_constant_evaluated() && __builtin_constant_p(__r_.first().__l.__is_long_)) { 1797 return __r_.first().__l.__is_long_; 1798 } 1799 return __r_.first().__s.__is_long_; 1800 } 1801 1802 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __begin_lifetime(pointer __begin, size_type __n) { 1803#if _LIBCPP_STD_VER >= 20 1804 if (__libcpp_is_constant_evaluated()) { 1805 for (size_type __i = 0; __i != __n; ++__i) 1806 std::construct_at(std::addressof(__begin[__i])); 1807 } 1808#else 1809 (void)__begin; 1810 (void)__n; 1811#endif // _LIBCPP_STD_VER >= 20 1812 } 1813 1814 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) { 1815 return __sz < __min_cap; 1816 } 1817 1818 template <class _Iterator, class _Sentinel> 1819 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 1820 void __assign_trivial(_Iterator __first, _Sentinel __last, size_type __n); 1821 1822 template <class _Iterator, class _Sentinel> 1823 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 1824 void __assign_with_sentinel(_Iterator __first, _Sentinel __last); 1825 1826 template <class _ForwardIterator, class _Sentinel> 1827 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1828 iterator __insert_from_safe_copy(size_type __n, size_type __ip, _ForwardIterator __first, _Sentinel __last) { 1829 size_type __sz = size(); 1830 size_type __cap = capacity(); 1831 value_type* __p; 1832 if (__cap - __sz >= __n) 1833 { 1834 __annotate_increase(__n); 1835 __p = std::__to_address(__get_pointer()); 1836 size_type __n_move = __sz - __ip; 1837 if (__n_move != 0) 1838 traits_type::move(__p + __ip + __n, __p + __ip, __n_move); 1839 } 1840 else 1841 { 1842 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); 1843 __p = std::__to_address(__get_long_pointer()); 1844 } 1845 __sz += __n; 1846 __set_size(__sz); 1847 traits_type::assign(__p[__sz], value_type()); 1848 for (__p += __ip; __first != __last; ++__p, ++__first) 1849 traits_type::assign(*__p, *__first); 1850 1851 return begin() + __ip; 1852 } 1853 1854 template<class _Iterator, class _Sentinel> 1855 _LIBCPP_CONSTEXPR_SINCE_CXX20 1856 iterator __insert_with_size(const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n); 1857 1858 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 allocator_type& __alloc() _NOEXCEPT { return __r_.second(); } 1859 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const allocator_type& __alloc() const _NOEXCEPT { return __r_.second(); } 1860 1861 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 1862 void __set_short_size(size_type __s) _NOEXCEPT { 1863 _LIBCPP_ASSERT_INTERNAL( 1864 __s < __min_cap, "__s should never be greater than or equal to the short string capacity"); 1865 __r_.first().__s.__size_ = __s; 1866 __r_.first().__s.__is_long_ = false; 1867 } 1868 1869 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 1870 size_type __get_short_size() const _NOEXCEPT { 1871 _LIBCPP_ASSERT_INTERNAL( 1872 !__r_.first().__s.__is_long_, "String has to be short when trying to get the short size"); 1873 return __r_.first().__s.__size_; 1874 } 1875 1876 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1877 void __set_long_size(size_type __s) _NOEXCEPT 1878 {__r_.first().__l.__size_ = __s;} 1879 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1880 size_type __get_long_size() const _NOEXCEPT 1881 {return __r_.first().__l.__size_;} 1882 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1883 void __set_size(size_type __s) _NOEXCEPT 1884 {if (__is_long()) __set_long_size(__s); else __set_short_size(__s);} 1885 1886 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1887 void __set_long_cap(size_type __s) _NOEXCEPT { 1888 __r_.first().__l.__cap_ = __s / __endian_factor; 1889 __r_.first().__l.__is_long_ = true; 1890 } 1891 1892 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1893 size_type __get_long_cap() const _NOEXCEPT { 1894 return __r_.first().__l.__cap_ * __endian_factor; 1895 } 1896 1897 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1898 void __set_long_pointer(pointer __p) _NOEXCEPT 1899 {__r_.first().__l.__data_ = __p;} 1900 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1901 pointer __get_long_pointer() _NOEXCEPT 1902 {return __r_.first().__l.__data_;} 1903 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1904 const_pointer __get_long_pointer() const _NOEXCEPT 1905 {return __r_.first().__l.__data_;} 1906 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1907 pointer __get_short_pointer() _NOEXCEPT 1908 {return pointer_traits<pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1909 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1910 const_pointer __get_short_pointer() const _NOEXCEPT 1911 {return pointer_traits<const_pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1912 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1913 pointer __get_pointer() _NOEXCEPT 1914 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1915 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1916 const_pointer __get_pointer() const _NOEXCEPT 1917 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1918 1919 // The following functions are no-ops outside of AddressSanitizer mode. 1920 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_contiguous_container(const void* __old_mid, const void* __new_mid) const { 1921 (void)__old_mid; 1922 (void)__new_mid; 1923#if !defined(_LIBCPP_HAS_NO_ASAN) && defined(_LIBCPP_INSTRUMENTED_WITH_ASAN) 1924 const void* __begin = data(); 1925 const void* __end = data() + capacity() + 1; 1926 if (!__libcpp_is_constant_evaluated() && __begin != nullptr && is_same<allocator_type, __default_allocator_type>::value) 1927 __sanitizer_annotate_contiguous_container(__begin, __end, __old_mid, __new_mid); 1928#endif 1929 } 1930 1931 // ASan: short string is poisoned if and only if this function returns true. 1932 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __asan_short_string_is_annotated() const _NOEXCEPT { 1933 return _LIBCPP_SHORT_STRING_ANNOTATIONS_ALLOWED && !__libcpp_is_constant_evaluated(); 1934 } 1935 1936 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_new(size_type __current_size) const _NOEXCEPT { 1937 if (!__libcpp_is_constant_evaluated() && (__asan_short_string_is_annotated() || __is_long())) 1938 __annotate_contiguous_container(data() + capacity() + 1, data() + __current_size + 1); 1939 } 1940 1941 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_delete() const _NOEXCEPT { 1942 if (!__libcpp_is_constant_evaluated() && (__asan_short_string_is_annotated() || __is_long())) 1943 __annotate_contiguous_container(data() + size() + 1, data() + capacity() + 1); 1944 } 1945 1946 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_increase(size_type __n) const _NOEXCEPT { 1947 if (!__libcpp_is_constant_evaluated() && (__asan_short_string_is_annotated() || __is_long())) 1948 __annotate_contiguous_container(data() + size() + 1, data() + size() + 1 + __n); 1949 } 1950 1951 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __annotate_shrink(size_type __old_size) const _NOEXCEPT { 1952 if (!__libcpp_is_constant_evaluated() && (__asan_short_string_is_annotated() || __is_long())) 1953 __annotate_contiguous_container(data() + __old_size + 1, data() + size() + 1); 1954 } 1955 1956 template <size_type __a> static 1957 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1958 size_type __align_it(size_type __s) _NOEXCEPT 1959 {return (__s + (__a-1)) & ~(__a-1);} 1960 enum { 1961 __alignment = 1962#ifdef _LIBCPP_ABI_STRING_8_BYTE_ALIGNMENT 1963 8 1964#else 1965 16 1966#endif 1967 }; 1968 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1969 size_type __recommend(size_type __s) _NOEXCEPT 1970 { 1971 if (__s < __min_cap) { 1972 return static_cast<size_type>(__min_cap) - 1; 1973 } 1974 size_type __guess = __align_it<sizeof(value_type) < __alignment ? 1975 __alignment/sizeof(value_type) : 1 > (__s+1) - 1; 1976 if (__guess == __min_cap) ++__guess; 1977 return __guess; 1978 } 1979 1980 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 1981 void __init(const value_type* __s, size_type __sz, size_type __reserve); 1982 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 1983 void __init(const value_type* __s, size_type __sz); 1984 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 1985 void __init(size_type __n, value_type __c); 1986 1987 // Slow path for the (inlined) copy constructor for 'long' strings. 1988 // Always externally instantiated and not inlined. 1989 // Requires that __s is zero terminated. 1990 // The main reason for this function to exist is because for unstable, we 1991 // want to allow inlining of the copy constructor. However, we don't want 1992 // to call the __init() functions as those are marked as inline which may 1993 // result in over-aggressive inlining by the compiler, where our aim is 1994 // to only inline the fast path code directly in the ctor. 1995 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void __init_copy_ctor_external(const value_type* __s, size_type __sz); 1996 1997 template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> = 0> 1998 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_InputIterator __first, _InputIterator __last); 1999 2000 template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> = 0> 2001 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_ForwardIterator __first, _ForwardIterator __last); 2002 2003 template <class _InputIterator, class _Sentinel> 2004 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2005 void __init_with_sentinel(_InputIterator __first, _Sentinel __last); 2006 template <class _InputIterator, class _Sentinel> 2007 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2008 void __init_with_size(_InputIterator __first, _Sentinel __last, size_type __sz); 2009 2010 _LIBCPP_CONSTEXPR_SINCE_CXX20 2011#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 2012 _LIBCPP_HIDE_FROM_ABI 2013#endif 2014 _LIBCPP_DEPRECATED_("use __grow_by_without_replace") 2015 void __grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2016 size_type __n_copy, size_type __n_del, size_type __n_add = 0); 2017 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 2018 void __grow_by_without_replace(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2019 size_type __n_copy, size_type __n_del, size_type __n_add = 0); 2020 _LIBCPP_CONSTEXPR_SINCE_CXX20 2021 void __grow_by_and_replace(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2022 size_type __n_copy, size_type __n_del, 2023 size_type __n_add, const value_type* __p_new_stuff); 2024 2025 // __assign_no_alias is invoked for assignment operations where we 2026 // have proof that the input does not alias the current instance. 2027 // For example, operator=(basic_string) performs a 'self' check. 2028 template <bool __is_short> 2029 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_no_alias(const value_type* __s, size_type __n); 2030 2031 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __erase_to_end(size_type __pos) { 2032 __null_terminate_at(std::__to_address(__get_pointer()), __pos); 2033 } 2034 2035 // __erase_external_with_move is invoked for erase() invocations where 2036 // `n ~= npos`, likely requiring memory moves on the string data. 2037 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE void __erase_external_with_move(size_type __pos, size_type __n); 2038 2039 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2040 void __copy_assign_alloc(const basic_string& __str) 2041 {__copy_assign_alloc(__str, integral_constant<bool, 2042 __alloc_traits::propagate_on_container_copy_assignment::value>());} 2043 2044 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2045 void __copy_assign_alloc(const basic_string& __str, true_type) 2046 { 2047 if (__alloc() == __str.__alloc()) 2048 __alloc() = __str.__alloc(); 2049 else 2050 { 2051 if (!__str.__is_long()) 2052 { 2053 __clear_and_shrink(); 2054 __alloc() = __str.__alloc(); 2055 } 2056 else 2057 { 2058 __annotate_delete(); 2059 allocator_type __a = __str.__alloc(); 2060 auto __allocation = std::__allocate_at_least(__a, __str.__get_long_cap()); 2061 __begin_lifetime(__allocation.ptr, __allocation.count); 2062 if (__is_long()) 2063 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2064 __alloc() = std::move(__a); 2065 __set_long_pointer(__allocation.ptr); 2066 __set_long_cap(__allocation.count); 2067 __set_long_size(__str.size()); 2068 __annotate_new(__get_long_size()); 2069 } 2070 } 2071 } 2072 2073 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2074 void __copy_assign_alloc(const basic_string&, false_type) _NOEXCEPT 2075 {} 2076 2077#ifndef _LIBCPP_CXX03_LANG 2078 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2079 void __move_assign(basic_string& __str, false_type) 2080 _NOEXCEPT_(__alloc_traits::is_always_equal::value); 2081 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 2082 void __move_assign(basic_string& __str, true_type) 2083#if _LIBCPP_STD_VER >= 17 2084 _NOEXCEPT; 2085#else 2086 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value); 2087#endif 2088#endif 2089 2090 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2091 void 2092 __move_assign_alloc(basic_string& __str) 2093 _NOEXCEPT_( 2094 !__alloc_traits::propagate_on_container_move_assignment::value || 2095 is_nothrow_move_assignable<allocator_type>::value) 2096 {__move_assign_alloc(__str, integral_constant<bool, 2097 __alloc_traits::propagate_on_container_move_assignment::value>());} 2098 2099 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2100 void __move_assign_alloc(basic_string& __c, true_type) 2101 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 2102 { 2103 __alloc() = std::move(__c.__alloc()); 2104 } 2105 2106 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2107 void __move_assign_alloc(basic_string&, false_type) 2108 _NOEXCEPT 2109 {} 2110 2111 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_external(const value_type* __s); 2112 _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE basic_string& __assign_external(const value_type* __s, size_type __n); 2113 2114 // Assigns the value in __s, guaranteed to be __n < __min_cap in length. 2115 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_short(const value_type* __s, size_type __n) { 2116 size_type __old_size = size(); 2117 if (__n > __old_size) 2118 __annotate_increase(__n - __old_size); 2119 pointer __p = __is_long() 2120 ? (__set_long_size(__n), __get_long_pointer()) 2121 : (__set_short_size(__n), __get_short_pointer()); 2122 traits_type::move(std::__to_address(__p), __s, __n); 2123 traits_type::assign(__p[__n], value_type()); 2124 if (__old_size > __n) 2125 __annotate_shrink(__old_size); 2126 return *this; 2127 } 2128 2129 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2130 basic_string& __null_terminate_at(value_type* __p, size_type __newsz) { 2131 size_type __old_size = size(); 2132 if (__newsz > __old_size) 2133 __annotate_increase(__newsz - __old_size); 2134 __set_size(__newsz); 2135 traits_type::assign(__p[__newsz], value_type()); 2136 if (__old_size > __newsz) 2137 __annotate_shrink(__old_size); 2138 return *this; 2139 } 2140 2141 template <class _Tp> 2142 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __addr_in_range(const _Tp& __v) const { 2143 return std::__is_pointer_in_range(data(), data() + size() + 1, std::addressof(__v)); 2144 } 2145 2146 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI 2147 void __throw_length_error() const { 2148 std::__throw_length_error("basic_string"); 2149 } 2150 2151 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI 2152 void __throw_out_of_range() const { 2153 std::__throw_out_of_range("basic_string"); 2154 } 2155 2156 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, const basic_string&); 2157 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const value_type*, const basic_string&); 2158 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(value_type, const basic_string&); 2159 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, const value_type*); 2160 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, value_type); 2161}; 2162 2163// These declarations must appear before any functions are implicitly used 2164// so that they have the correct visibility specifier. 2165#define _LIBCPP_DECLARE(...) extern template __VA_ARGS__; 2166#ifdef _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 2167 _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 2168# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 2169 _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 2170# endif 2171#else 2172 _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 2173# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 2174 _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 2175# endif 2176#endif 2177#undef _LIBCPP_DECLARE 2178 2179 2180#if _LIBCPP_STD_VER >= 17 2181template<class _InputIterator, 2182 class _CharT = __iter_value_type<_InputIterator>, 2183 class _Allocator = allocator<_CharT>, 2184 class = enable_if_t<__has_input_iterator_category<_InputIterator>::value>, 2185 class = enable_if_t<__is_allocator<_Allocator>::value> 2186 > 2187basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator()) 2188 -> basic_string<_CharT, char_traits<_CharT>, _Allocator>; 2189 2190template<class _CharT, 2191 class _Traits, 2192 class _Allocator = allocator<_CharT>, 2193 class = enable_if_t<__is_allocator<_Allocator>::value> 2194 > 2195explicit basic_string(basic_string_view<_CharT, _Traits>, const _Allocator& = _Allocator()) 2196 -> basic_string<_CharT, _Traits, _Allocator>; 2197 2198template<class _CharT, 2199 class _Traits, 2200 class _Allocator = allocator<_CharT>, 2201 class = enable_if_t<__is_allocator<_Allocator>::value>, 2202 class _Sz = typename allocator_traits<_Allocator>::size_type 2203 > 2204basic_string(basic_string_view<_CharT, _Traits>, _Sz, _Sz, const _Allocator& = _Allocator()) 2205 -> basic_string<_CharT, _Traits, _Allocator>; 2206#endif 2207 2208#if _LIBCPP_STD_VER >= 23 2209template <ranges::input_range _Range, 2210 class _Allocator = allocator<ranges::range_value_t<_Range>>, 2211 class = enable_if_t<__is_allocator<_Allocator>::value> 2212 > 2213basic_string(from_range_t, _Range&&, _Allocator = _Allocator()) 2214 -> basic_string<ranges::range_value_t<_Range>, char_traits<ranges::range_value_t<_Range>>, _Allocator>; 2215#endif 2216 2217template <class _CharT, class _Traits, class _Allocator> 2218_LIBCPP_CONSTEXPR_SINCE_CXX20 2219void basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, 2220 size_type __sz, 2221 size_type __reserve) 2222{ 2223 if (__libcpp_is_constant_evaluated()) 2224 __r_.first() = __rep(); 2225 if (__reserve > max_size()) 2226 __throw_length_error(); 2227 pointer __p; 2228 if (__fits_in_sso(__reserve)) 2229 { 2230 __set_short_size(__sz); 2231 __p = __get_short_pointer(); 2232 } 2233 else 2234 { 2235 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__reserve) + 1); 2236 __p = __allocation.ptr; 2237 __begin_lifetime(__p, __allocation.count); 2238 __set_long_pointer(__p); 2239 __set_long_cap(__allocation.count); 2240 __set_long_size(__sz); 2241 } 2242 traits_type::copy(std::__to_address(__p), __s, __sz); 2243 traits_type::assign(__p[__sz], value_type()); 2244 __annotate_new(__sz); 2245} 2246 2247template <class _CharT, class _Traits, class _Allocator> 2248_LIBCPP_CONSTEXPR_SINCE_CXX20 2249void 2250basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz) 2251{ 2252 if (__libcpp_is_constant_evaluated()) 2253 __r_.first() = __rep(); 2254 if (__sz > max_size()) 2255 __throw_length_error(); 2256 pointer __p; 2257 if (__fits_in_sso(__sz)) 2258 { 2259 __set_short_size(__sz); 2260 __p = __get_short_pointer(); 2261 } 2262 else 2263 { 2264 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2265 __p = __allocation.ptr; 2266 __begin_lifetime(__p, __allocation.count); 2267 __set_long_pointer(__p); 2268 __set_long_cap(__allocation.count); 2269 __set_long_size(__sz); 2270 } 2271 traits_type::copy(std::__to_address(__p), __s, __sz); 2272 traits_type::assign(__p[__sz], value_type()); 2273 __annotate_new(__sz); 2274} 2275 2276template <class _CharT, class _Traits, class _Allocator> 2277_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE 2278void basic_string<_CharT, _Traits, _Allocator>::__init_copy_ctor_external( 2279 const value_type* __s, size_type __sz) { 2280 if (__libcpp_is_constant_evaluated()) 2281 __r_.first() = __rep(); 2282 2283 pointer __p; 2284 if (__fits_in_sso(__sz)) { 2285 __p = __get_short_pointer(); 2286 __set_short_size(__sz); 2287 } else { 2288 if (__sz > max_size()) 2289 __throw_length_error(); 2290 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2291 __p = __allocation.ptr; 2292 __begin_lifetime(__p, __allocation.count); 2293 __set_long_pointer(__p); 2294 __set_long_cap(__allocation.count); 2295 __set_long_size(__sz); 2296 } 2297 traits_type::copy(std::__to_address(__p), __s, __sz + 1); 2298 __annotate_new(__sz); 2299} 2300 2301template <class _CharT, class _Traits, class _Allocator> 2302_LIBCPP_CONSTEXPR_SINCE_CXX20 2303void 2304basic_string<_CharT, _Traits, _Allocator>::__init(size_type __n, value_type __c) 2305{ 2306 if (__libcpp_is_constant_evaluated()) 2307 __r_.first() = __rep(); 2308 2309 if (__n > max_size()) 2310 __throw_length_error(); 2311 pointer __p; 2312 if (__fits_in_sso(__n)) 2313 { 2314 __set_short_size(__n); 2315 __p = __get_short_pointer(); 2316 } 2317 else 2318 { 2319 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__n) + 1); 2320 __p = __allocation.ptr; 2321 __begin_lifetime(__p, __allocation.count); 2322 __set_long_pointer(__p); 2323 __set_long_cap(__allocation.count); 2324 __set_long_size(__n); 2325 } 2326 traits_type::assign(std::__to_address(__p), __n, __c); 2327 traits_type::assign(__p[__n], value_type()); 2328 __annotate_new(__n); 2329} 2330 2331template <class _CharT, class _Traits, class _Allocator> 2332template <class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 2333_LIBCPP_CONSTEXPR_SINCE_CXX20 2334void basic_string<_CharT, _Traits, _Allocator>::__init(_InputIterator __first, _InputIterator __last) 2335{ 2336 __init_with_sentinel(std::move(__first), std::move(__last)); 2337} 2338 2339template <class _CharT, class _Traits, class _Allocator> 2340template <class _InputIterator, class _Sentinel> 2341_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2342void basic_string<_CharT, _Traits, _Allocator>::__init_with_sentinel(_InputIterator __first, _Sentinel __last) { 2343 __r_.first() = __rep(); 2344 __annotate_new(0); 2345 2346#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2347 try 2348 { 2349#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2350 for (; __first != __last; ++__first) 2351 push_back(*__first); 2352#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2353 } 2354 catch (...) 2355 { 2356 __annotate_delete(); 2357 if (__is_long()) 2358 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2359 throw; 2360 } 2361#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2362} 2363 2364template <class _CharT, class _Traits, class _Allocator> 2365template <class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2366_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2367basic_string<_CharT, _Traits, _Allocator>::__init(_ForwardIterator __first, _ForwardIterator __last) 2368{ 2369 size_type __sz = static_cast<size_type>(std::distance(__first, __last)); 2370 __init_with_size(__first, __last, __sz); 2371} 2372 2373template <class _CharT, class _Traits, class _Allocator> 2374template <class _InputIterator, class _Sentinel> 2375_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2376void basic_string<_CharT, _Traits, _Allocator>::__init_with_size( 2377 _InputIterator __first, _Sentinel __last, size_type __sz) { 2378 if (__libcpp_is_constant_evaluated()) 2379 __r_.first() = __rep(); 2380 2381 if (__sz > max_size()) 2382 __throw_length_error(); 2383 2384 pointer __p; 2385 if (__fits_in_sso(__sz)) 2386 { 2387 __set_short_size(__sz); 2388 __p = __get_short_pointer(); 2389 2390 } 2391 else 2392 { 2393 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2394 __p = __allocation.ptr; 2395 __begin_lifetime(__p, __allocation.count); 2396 __set_long_pointer(__p); 2397 __set_long_cap(__allocation.count); 2398 __set_long_size(__sz); 2399 } 2400 2401#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2402 try 2403 { 2404#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2405 for (; __first != __last; ++__first, (void) ++__p) 2406 traits_type::assign(*__p, *__first); 2407 traits_type::assign(*__p, value_type()); 2408#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2409 } 2410 catch (...) 2411 { 2412 if (__is_long()) 2413 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2414 throw; 2415 } 2416#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2417 __annotate_new(__sz); 2418} 2419 2420template <class _CharT, class _Traits, class _Allocator> 2421_LIBCPP_CONSTEXPR_SINCE_CXX20 2422void 2423basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace 2424 (size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2425 size_type __n_copy, size_type __n_del, size_type __n_add, const value_type* __p_new_stuff) 2426{ 2427 size_type __ms = max_size(); 2428 if (__delta_cap > __ms - __old_cap - 1) 2429 __throw_length_error(); 2430 pointer __old_p = __get_pointer(); 2431 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2432 __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2433 __ms - 1; 2434 __annotate_delete(); 2435 auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); 2436 pointer __p = __allocation.ptr; 2437 __begin_lifetime(__p, __allocation.count); 2438 if (__n_copy != 0) 2439 traits_type::copy(std::__to_address(__p), 2440 std::__to_address(__old_p), __n_copy); 2441 if (__n_add != 0) 2442 traits_type::copy(std::__to_address(__p) + __n_copy, __p_new_stuff, __n_add); 2443 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2444 if (__sec_cp_sz != 0) 2445 traits_type::copy(std::__to_address(__p) + __n_copy + __n_add, 2446 std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2447 if (__old_cap+1 != __min_cap) 2448 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1); 2449 __set_long_pointer(__p); 2450 __set_long_cap(__allocation.count); 2451 __old_sz = __n_copy + __n_add + __sec_cp_sz; 2452 __set_long_size(__old_sz); 2453 traits_type::assign(__p[__old_sz], value_type()); 2454 __annotate_new(__old_cap + __delta_cap); 2455} 2456 2457// __grow_by is deprecated because it does not set the size. It may not update the size when the size is changed, and it 2458// may also not set the size at all when the string was short initially. This leads to unpredictable size value. It is 2459// not removed or changed to avoid breaking the ABI. 2460template <class _CharT, class _Traits, class _Allocator> 2461void 2462_LIBCPP_CONSTEXPR_SINCE_CXX20 2463#if _LIBCPP_ABI_VERSION >= 2 // We want to use the function in the dylib in ABIv1 2464 _LIBCPP_HIDE_FROM_ABI 2465#endif 2466 _LIBCPP_DEPRECATED_("use __grow_by_without_replace") 2467basic_string<_CharT, _Traits, _Allocator>::__grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2468 size_type __n_copy, size_type __n_del, size_type __n_add) 2469{ 2470 size_type __ms = max_size(); 2471 if (__delta_cap > __ms - __old_cap) 2472 __throw_length_error(); 2473 pointer __old_p = __get_pointer(); 2474 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2475 __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2476 __ms - 1; 2477 __annotate_delete(); 2478 auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); 2479 pointer __p = __allocation.ptr; 2480 __begin_lifetime(__p, __allocation.count); 2481 if (__n_copy != 0) 2482 traits_type::copy(std::__to_address(__p), 2483 std::__to_address(__old_p), __n_copy); 2484 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2485 if (__sec_cp_sz != 0) 2486 traits_type::copy(std::__to_address(__p) + __n_copy + __n_add, 2487 std::__to_address(__old_p) + __n_copy + __n_del, 2488 __sec_cp_sz); 2489 if (__old_cap + 1 != __min_cap) 2490 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap + 1); 2491 __set_long_pointer(__p); 2492 __set_long_cap(__allocation.count); 2493} 2494 2495template <class _CharT, class _Traits, class _Allocator> 2496void _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 2497basic_string<_CharT, _Traits, _Allocator>::__grow_by_without_replace( 2498 size_type __old_cap, 2499 size_type __delta_cap, 2500 size_type __old_sz, 2501 size_type __n_copy, 2502 size_type __n_del, 2503 size_type __n_add) { 2504 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 2505 __grow_by(__old_cap, __delta_cap, __old_sz, __n_copy, __n_del, __n_add); 2506 _LIBCPP_SUPPRESS_DEPRECATED_POP 2507 __set_long_size(__old_sz - __n_del + __n_add); 2508 __annotate_new(__old_sz - __n_del + __n_add); 2509} 2510 2511// assign 2512 2513template <class _CharT, class _Traits, class _Allocator> 2514template <bool __is_short> 2515_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE 2516basic_string<_CharT, _Traits, _Allocator>& 2517basic_string<_CharT, _Traits, _Allocator>::__assign_no_alias( 2518 const value_type* __s, size_type __n) { 2519 size_type __cap = __is_short ? static_cast<size_type>(__min_cap) : __get_long_cap(); 2520 if (__n < __cap) { 2521 size_type __old_size = __is_short ? __get_short_size() : __get_long_size(); 2522 if (__n > __old_size) 2523 __annotate_increase(__n - __old_size); 2524 pointer __p = __is_short ? __get_short_pointer() : __get_long_pointer(); 2525 __is_short ? __set_short_size(__n) : __set_long_size(__n); 2526 traits_type::copy(std::__to_address(__p), __s, __n); 2527 traits_type::assign(__p[__n], value_type()); 2528 if (__old_size > __n) 2529 __annotate_shrink(__old_size); 2530 } else { 2531 size_type __sz = __is_short ? __get_short_size() : __get_long_size(); 2532 __grow_by_and_replace(__cap - 1, __n - __cap + 1, __sz, 0, __sz, __n, __s); 2533 } 2534 return *this; 2535} 2536 2537template <class _CharT, class _Traits, class _Allocator> 2538_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE 2539basic_string<_CharT, _Traits, _Allocator>& 2540basic_string<_CharT, _Traits, _Allocator>::__assign_external( 2541 const value_type* __s, size_type __n) { 2542 size_type __cap = capacity(); 2543 if (__cap >= __n) { 2544 size_type __old_size = size(); 2545 if (__n > __old_size) 2546 __annotate_increase(__n - __old_size); 2547 value_type* __p = std::__to_address(__get_pointer()); 2548 traits_type::move(__p, __s, __n); 2549 return __null_terminate_at(__p, __n); 2550 } else { 2551 size_type __sz = size(); 2552 __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); 2553 return *this; 2554 } 2555} 2556 2557template <class _CharT, class _Traits, class _Allocator> 2558_LIBCPP_CONSTEXPR_SINCE_CXX20 2559basic_string<_CharT, _Traits, _Allocator>& 2560basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s, size_type __n) 2561{ 2562 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::assign received nullptr"); 2563 return (__builtin_constant_p(__n) && __fits_in_sso(__n)) 2564 ? __assign_short(__s, __n) 2565 : __assign_external(__s, __n); 2566} 2567 2568template <class _CharT, class _Traits, class _Allocator> 2569_LIBCPP_CONSTEXPR_SINCE_CXX20 2570basic_string<_CharT, _Traits, _Allocator>& 2571basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) 2572{ 2573 size_type __cap = capacity(); 2574 size_type __old_size = size(); 2575 if (__cap < __n) 2576 { 2577 size_type __sz = size(); 2578 __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); 2579 __annotate_increase(__n); 2580 } 2581 else if(__n > __old_size) 2582 __annotate_increase(__n - __old_size); 2583 value_type* __p = std::__to_address(__get_pointer()); 2584 traits_type::assign(__p, __n, __c); 2585 return __null_terminate_at(__p, __n); 2586} 2587 2588template <class _CharT, class _Traits, class _Allocator> 2589_LIBCPP_CONSTEXPR_SINCE_CXX20 2590basic_string<_CharT, _Traits, _Allocator>& 2591basic_string<_CharT, _Traits, _Allocator>::operator=(value_type __c) 2592{ 2593 pointer __p; 2594 size_type __old_size = size(); 2595 if (__old_size == 0) 2596 __annotate_increase(1); 2597 if (__is_long()) { 2598 __p = __get_long_pointer(); 2599 __set_long_size(1); 2600 } else { 2601 __p = __get_short_pointer(); 2602 __set_short_size(1); 2603 } 2604 traits_type::assign(*__p, __c); 2605 traits_type::assign(*++__p, value_type()); 2606 if (__old_size > 1) 2607 __annotate_shrink(__old_size); 2608 return *this; 2609} 2610 2611template <class _CharT, class _Traits, class _Allocator> 2612_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 2613basic_string<_CharT, _Traits, _Allocator>& 2614basic_string<_CharT, _Traits, _Allocator>::operator=(const basic_string& __str) 2615{ 2616 if (this != std::addressof(__str)) { 2617 __copy_assign_alloc(__str); 2618 if (!__is_long()) { 2619 if (!__str.__is_long()) { 2620 size_type __old_size = __get_short_size(); 2621 if (__get_short_size() < __str.__get_short_size()) 2622 __annotate_increase(__str.__get_short_size() - __get_short_size()); 2623 __r_.first() = __str.__r_.first(); 2624 if (__old_size > __get_short_size()) 2625 __annotate_shrink(__old_size); 2626 } else { 2627 return __assign_no_alias<true>(__str.data(), __str.size()); 2628 } 2629 } else { 2630 return __assign_no_alias<false>(__str.data(), __str.size()); 2631 } 2632 } 2633 return *this; 2634} 2635 2636#ifndef _LIBCPP_CXX03_LANG 2637 2638template <class _CharT, class _Traits, class _Allocator> 2639inline _LIBCPP_CONSTEXPR_SINCE_CXX20 2640void 2641basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, false_type) 2642 _NOEXCEPT_(__alloc_traits::is_always_equal::value) 2643{ 2644 if (__alloc() != __str.__alloc()) 2645 assign(__str); 2646 else 2647 __move_assign(__str, true_type()); 2648} 2649 2650template <class _CharT, class _Traits, class _Allocator> 2651inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_STRING_INTERNAL_MEMORY_ACCESS 2652void 2653basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type) 2654#if _LIBCPP_STD_VER >= 17 2655 _NOEXCEPT 2656#else 2657 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 2658#endif 2659{ 2660 __annotate_delete(); 2661 if (__is_long()) { 2662 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), 2663 __get_long_cap()); 2664#if _LIBCPP_STD_VER <= 14 2665 if (!is_nothrow_move_assignable<allocator_type>::value) { 2666 __set_short_size(0); 2667 traits_type::assign(__get_short_pointer()[0], value_type()); 2668 __annotate_new(0); 2669 } 2670#endif 2671 } 2672 size_type __str_old_size = __str.size(); 2673 bool __str_was_short = !__str.__is_long(); 2674 2675 __move_assign_alloc(__str); 2676 __r_.first() = __str.__r_.first(); 2677 __str.__set_short_size(0); 2678 traits_type::assign(__str.__get_short_pointer()[0], value_type()); 2679 2680 if (__str_was_short && this != &__str) 2681 __str.__annotate_shrink(__str_old_size); 2682 else 2683 // ASan annotations: was long, so object memory is unpoisoned as new. 2684 // Or is same as *this, and __annotate_delete() was called. 2685 __str.__annotate_new(0); 2686 2687 // ASan annotations: Guard against `std::string s; s = std::move(s);` 2688 // You can find more here: https://en.cppreference.com/w/cpp/utility/move 2689 // Quote: "Unless otherwise specified, all standard library objects that have been moved 2690 // from are placed in a "valid but unspecified state", meaning the object's class 2691 // invariants hold (so functions without preconditions, such as the assignment operator, 2692 // can be safely used on the object after it was moved from):" 2693 // Quote: "v = std::move(v); // the value of v is unspecified" 2694 if (!__is_long() && &__str != this) 2695 // If it is long string, delete was never called on original __str's buffer. 2696 __annotate_new(__get_short_size()); 2697} 2698 2699#endif 2700 2701template <class _CharT, class _Traits, class _Allocator> 2702template<class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 2703_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2704basic_string<_CharT, _Traits, _Allocator>::assign(_InputIterator __first, _InputIterator __last) 2705{ 2706 __assign_with_sentinel(__first, __last); 2707 return *this; 2708} 2709 2710template <class _CharT, class _Traits, class _Allocator> 2711template <class _InputIterator, class _Sentinel> 2712_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 2713void 2714basic_string<_CharT, _Traits, _Allocator>::__assign_with_sentinel(_InputIterator __first, _Sentinel __last) { 2715 const basic_string __temp(__init_with_sentinel_tag(), std::move(__first), std::move(__last), __alloc()); 2716 assign(__temp.data(), __temp.size()); 2717} 2718 2719template <class _CharT, class _Traits, class _Allocator> 2720template<class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2721_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2722basic_string<_CharT, _Traits, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last) 2723{ 2724 if (__string_is_trivial_iterator<_ForwardIterator>::value) { 2725 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2726 __assign_trivial(__first, __last, __n); 2727 } else { 2728 __assign_with_sentinel(__first, __last); 2729 } 2730 2731 return *this; 2732} 2733 2734template <class _CharT, class _Traits, class _Allocator> 2735template <class _Iterator, class _Sentinel> 2736_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 2737void 2738basic_string<_CharT, _Traits, _Allocator>::__assign_trivial(_Iterator __first, _Sentinel __last, size_type __n) { 2739 _LIBCPP_ASSERT_INTERNAL( 2740 __string_is_trivial_iterator<_Iterator>::value, "The iterator type given to `__assign_trivial` must be trivial"); 2741 2742 size_type __old_size = size(); 2743 size_type __cap = capacity(); 2744 if (__cap < __n) { 2745 // Unlike `append` functions, if the input range points into the string itself, there is no case that the input 2746 // range could get invalidated by reallocation: 2747 // 1. If the input range is a subset of the string itself, its size cannot exceed the capacity of the string, 2748 // thus no reallocation would happen. 2749 // 2. In the exotic case where the input range is the byte representation of the string itself, the string 2750 // object itself stays valid even if reallocation happens. 2751 size_type __sz = size(); 2752 __grow_by_without_replace(__cap, __n - __cap, __sz, 0, __sz); 2753 __annotate_increase(__n); 2754 } 2755 else if (__n > __old_size) 2756 __annotate_increase(__n - __old_size); 2757 pointer __p = __get_pointer(); 2758 for (; __first != __last; ++__p, (void) ++__first) 2759 traits_type::assign(*__p, *__first); 2760 traits_type::assign(*__p, value_type()); 2761 __set_size(__n); 2762 if (__n < __old_size) 2763 __annotate_shrink(__old_size); 2764} 2765 2766template <class _CharT, class _Traits, class _Allocator> 2767_LIBCPP_CONSTEXPR_SINCE_CXX20 2768basic_string<_CharT, _Traits, _Allocator>& 2769basic_string<_CharT, _Traits, _Allocator>::assign(const basic_string& __str, size_type __pos, size_type __n) 2770{ 2771 size_type __sz = __str.size(); 2772 if (__pos > __sz) 2773 __throw_out_of_range(); 2774 return assign(__str.data() + __pos, std::min(__n, __sz - __pos)); 2775} 2776 2777template <class _CharT, class _Traits, class _Allocator> 2778template <class _Tp, 2779 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2780 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2781 int> > 2782_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2783basic_string<_CharT, _Traits, _Allocator>::assign(const _Tp& __t, size_type __pos, size_type __n) { 2784 __self_view __sv = __t; 2785 size_type __sz = __sv.size(); 2786 if (__pos > __sz) 2787 __throw_out_of_range(); 2788 return assign(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2789} 2790 2791template <class _CharT, class _Traits, class _Allocator> 2792_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE 2793basic_string<_CharT, _Traits, _Allocator>& 2794basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s) { 2795 return __assign_external(__s, traits_type::length(__s)); 2796} 2797 2798template <class _CharT, class _Traits, class _Allocator> 2799_LIBCPP_CONSTEXPR_SINCE_CXX20 2800basic_string<_CharT, _Traits, _Allocator>& 2801basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s) 2802{ 2803 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::assign received nullptr"); 2804 return __builtin_constant_p(*__s) 2805 ? (__fits_in_sso(traits_type::length(__s)) 2806 ? __assign_short(__s, traits_type::length(__s)) 2807 : __assign_external(__s, traits_type::length(__s))) 2808 : __assign_external(__s); 2809} 2810// append 2811 2812template <class _CharT, class _Traits, class _Allocator> 2813_LIBCPP_CONSTEXPR_SINCE_CXX20 2814basic_string<_CharT, _Traits, _Allocator>& 2815basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s, size_type __n) 2816{ 2817 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::append received nullptr"); 2818 size_type __cap = capacity(); 2819 size_type __sz = size(); 2820 if (__cap - __sz >= __n) 2821 { 2822 if (__n) 2823 { 2824 __annotate_increase(__n); 2825 value_type* __p = std::__to_address(__get_pointer()); 2826 traits_type::copy(__p + __sz, __s, __n); 2827 __sz += __n; 2828 __set_size(__sz); 2829 traits_type::assign(__p[__sz], value_type()); 2830 } 2831 } 2832 else 2833 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __sz, 0, __n, __s); 2834 return *this; 2835} 2836 2837template <class _CharT, class _Traits, class _Allocator> 2838_LIBCPP_CONSTEXPR_SINCE_CXX20 2839basic_string<_CharT, _Traits, _Allocator>& 2840basic_string<_CharT, _Traits, _Allocator>::append(size_type __n, value_type __c) 2841{ 2842 if (__n) 2843 { 2844 size_type __cap = capacity(); 2845 size_type __sz = size(); 2846 if (__cap - __sz < __n) 2847 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2848 __annotate_increase(__n); 2849 pointer __p = __get_pointer(); 2850 traits_type::assign(std::__to_address(__p) + __sz, __n, __c); 2851 __sz += __n; 2852 __set_size(__sz); 2853 traits_type::assign(__p[__sz], value_type()); 2854 } 2855 return *this; 2856} 2857 2858template <class _CharT, class _Traits, class _Allocator> 2859_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 2860basic_string<_CharT, _Traits, _Allocator>::__append_default_init(size_type __n) 2861{ 2862 if (__n) 2863 { 2864 size_type __cap = capacity(); 2865 size_type __sz = size(); 2866 if (__cap - __sz < __n) 2867 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2868 __annotate_increase(__n); 2869 pointer __p = __get_pointer(); 2870 __sz += __n; 2871 __set_size(__sz); 2872 traits_type::assign(__p[__sz], value_type()); 2873 } 2874} 2875 2876template <class _CharT, class _Traits, class _Allocator> 2877_LIBCPP_CONSTEXPR_SINCE_CXX20 2878void 2879basic_string<_CharT, _Traits, _Allocator>::push_back(value_type __c) 2880{ 2881 bool __is_short = !__is_long(); 2882 size_type __cap; 2883 size_type __sz; 2884 if (__is_short) 2885 { 2886 __cap = __min_cap - 1; 2887 __sz = __get_short_size(); 2888 } 2889 else 2890 { 2891 __cap = __get_long_cap() - 1; 2892 __sz = __get_long_size(); 2893 } 2894 if (__sz == __cap) 2895 { 2896 __grow_by_without_replace(__cap, 1, __sz, __sz, 0); 2897 __annotate_increase(1); 2898 __is_short = false; // the string is always long after __grow_by 2899 } else 2900 __annotate_increase(1); 2901 pointer __p = __get_pointer(); 2902 if (__is_short) 2903 { 2904 __p = __get_short_pointer() + __sz; 2905 __set_short_size(__sz+1); 2906 } 2907 else 2908 { 2909 __p = __get_long_pointer() + __sz; 2910 __set_long_size(__sz+1); 2911 } 2912 traits_type::assign(*__p, __c); 2913 traits_type::assign(*++__p, value_type()); 2914} 2915 2916template <class _CharT, class _Traits, class _Allocator> 2917template<class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 2918_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2919basic_string<_CharT, _Traits, _Allocator>::append( 2920 _ForwardIterator __first, _ForwardIterator __last) 2921{ 2922 size_type __sz = size(); 2923 size_type __cap = capacity(); 2924 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2925 if (__n) 2926 { 2927 if (__string_is_trivial_iterator<_ForwardIterator>::value && 2928 !__addr_in_range(*__first)) 2929 { 2930 if (__cap - __sz < __n) 2931 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __sz, 0); 2932 __annotate_increase(__n); 2933 pointer __p = __get_pointer() + __sz; 2934 for (; __first != __last; ++__p, (void) ++__first) 2935 traits_type::assign(*__p, *__first); 2936 traits_type::assign(*__p, value_type()); 2937 __set_size(__sz + __n); 2938 } 2939 else 2940 { 2941 const basic_string __temp(__first, __last, __alloc()); 2942 append(__temp.data(), __temp.size()); 2943 } 2944 } 2945 return *this; 2946} 2947 2948template <class _CharT, class _Traits, class _Allocator> 2949_LIBCPP_CONSTEXPR_SINCE_CXX20 2950basic_string<_CharT, _Traits, _Allocator>& 2951basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str, size_type __pos, size_type __n) 2952{ 2953 size_type __sz = __str.size(); 2954 if (__pos > __sz) 2955 __throw_out_of_range(); 2956 return append(__str.data() + __pos, std::min(__n, __sz - __pos)); 2957} 2958 2959template <class _CharT, class _Traits, class _Allocator> 2960template <class _Tp, 2961 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2962 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2963 int> > 2964_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2965basic_string<_CharT, _Traits, _Allocator>::append(const _Tp& __t, size_type __pos, size_type __n) { 2966 __self_view __sv = __t; 2967 size_type __sz = __sv.size(); 2968 if (__pos > __sz) 2969 __throw_out_of_range(); 2970 return append(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2971} 2972 2973template <class _CharT, class _Traits, class _Allocator> 2974_LIBCPP_CONSTEXPR_SINCE_CXX20 2975basic_string<_CharT, _Traits, _Allocator>& 2976basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s) 2977{ 2978 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::append received nullptr"); 2979 return append(__s, traits_type::length(__s)); 2980} 2981 2982// insert 2983 2984template <class _CharT, class _Traits, class _Allocator> 2985_LIBCPP_CONSTEXPR_SINCE_CXX20 2986basic_string<_CharT, _Traits, _Allocator>& 2987basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s, size_type __n) 2988{ 2989 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::insert received nullptr"); 2990 size_type __sz = size(); 2991 if (__pos > __sz) 2992 __throw_out_of_range(); 2993 size_type __cap = capacity(); 2994 if (__cap - __sz >= __n) 2995 { 2996 if (__n) 2997 { 2998 __annotate_increase(__n); 2999 value_type* __p = std::__to_address(__get_pointer()); 3000 size_type __n_move = __sz - __pos; 3001 if (__n_move != 0) 3002 { 3003 if (std::__is_pointer_in_range(__p + __pos, __p + __sz, __s)) 3004 __s += __n; 3005 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 3006 } 3007 traits_type::move(__p + __pos, __s, __n); 3008 __sz += __n; 3009 __set_size(__sz); 3010 traits_type::assign(__p[__sz], value_type()); 3011 } 3012 } 3013 else 3014 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); 3015 return *this; 3016} 3017 3018template <class _CharT, class _Traits, class _Allocator> 3019_LIBCPP_CONSTEXPR_SINCE_CXX20 3020basic_string<_CharT, _Traits, _Allocator>& 3021basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, size_type __n, value_type __c) 3022{ 3023 size_type __sz = size(); 3024 if (__pos > __sz) 3025 __throw_out_of_range(); 3026 if (__n) 3027 { 3028 size_type __cap = capacity(); 3029 value_type* __p; 3030 if (__cap - __sz >= __n) 3031 { 3032 __annotate_increase(__n); 3033 __p = std::__to_address(__get_pointer()); 3034 size_type __n_move = __sz - __pos; 3035 if (__n_move != 0) 3036 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 3037 } 3038 else 3039 { 3040 __grow_by_without_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n); 3041 __p = std::__to_address(__get_long_pointer()); 3042 } 3043 traits_type::assign(__p + __pos, __n, __c); 3044 __sz += __n; 3045 __set_size(__sz); 3046 traits_type::assign(__p[__sz], value_type()); 3047 } 3048 return *this; 3049} 3050 3051template <class _CharT, class _Traits, class _Allocator> 3052template<class _InputIterator, __enable_if_t<__has_exactly_input_iterator_category<_InputIterator>::value, int> > 3053_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3054basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) 3055{ 3056 const basic_string __temp(__first, __last, __alloc()); 3057 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 3058} 3059 3060template <class _CharT, class _Traits, class _Allocator> 3061template<class _ForwardIterator, __enable_if_t<__has_forward_iterator_category<_ForwardIterator>::value, int> > 3062_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 3063basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) 3064{ 3065 auto __n = static_cast<size_type>(std::distance(__first, __last)); 3066 return __insert_with_size(__pos, __first, __last, __n); 3067} 3068 3069template <class _CharT, class _Traits, class _Allocator> 3070template<class _Iterator, class _Sentinel> 3071_LIBCPP_CONSTEXPR_SINCE_CXX20 3072typename basic_string<_CharT, _Traits, _Allocator>::iterator 3073basic_string<_CharT, _Traits, _Allocator>::__insert_with_size( 3074 const_iterator __pos, _Iterator __first, _Sentinel __last, size_type __n) { 3075 size_type __ip = static_cast<size_type>(__pos - begin()); 3076 if (__n == 0) 3077 return begin() + __ip; 3078 3079 if (__string_is_trivial_iterator<_Iterator>::value && !__addr_in_range(*__first)) 3080 { 3081 return __insert_from_safe_copy(__n, __ip, __first, __last); 3082 } 3083 else 3084 { 3085 const basic_string __temp(__init_with_sentinel_tag(), __first, __last, __alloc()); 3086 return __insert_from_safe_copy(__n, __ip, __temp.begin(), __temp.end()); 3087 } 3088} 3089 3090template <class _CharT, class _Traits, class _Allocator> 3091_LIBCPP_CONSTEXPR_SINCE_CXX20 3092basic_string<_CharT, _Traits, _Allocator>& 3093basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str, 3094 size_type __pos2, size_type __n) 3095{ 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 3118basic_string<_CharT, _Traits, _Allocator>& 3119basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) 3120{ 3121 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::insert received nullptr"); 3122 return insert(__pos, __s, traits_type::length(__s)); 3123} 3124 3125template <class _CharT, class _Traits, class _Allocator> 3126_LIBCPP_CONSTEXPR_SINCE_CXX20 3127typename basic_string<_CharT, _Traits, _Allocator>::iterator 3128basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) 3129{ 3130 size_type __ip = static_cast<size_type>(__pos - begin()); 3131 size_type __sz = size(); 3132 size_type __cap = capacity(); 3133 value_type* __p; 3134 if (__cap == __sz) 3135 { 3136 __grow_by_without_replace(__cap, 1, __sz, __ip, 0, 1); 3137 __p = std::__to_address(__get_long_pointer()); 3138 } 3139 else 3140 { 3141 __annotate_increase(1); 3142 __p = std::__to_address(__get_pointer()); 3143 size_type __n_move = __sz - __ip; 3144 if (__n_move != 0) 3145 traits_type::move(__p + __ip + 1, __p + __ip, __n_move); 3146 } 3147 traits_type::assign(__p[__ip], __c); 3148 traits_type::assign(__p[++__sz], value_type()); 3149 __set_size(__sz); 3150 return begin() + static_cast<difference_type>(__ip); 3151} 3152 3153// replace 3154 3155template <class _CharT, class _Traits, class _Allocator> 3156_LIBCPP_CONSTEXPR_SINCE_CXX20 3157basic_string<_CharT, _Traits, _Allocator>& 3158basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2) 3159 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 3160{ 3161 _LIBCPP_ASSERT_NON_NULL(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); 3162 size_type __sz = size(); 3163 if (__pos > __sz) 3164 __throw_out_of_range(); 3165 __n1 = std::min(__n1, __sz - __pos); 3166 size_type __cap = capacity(); 3167 if (__cap - __sz + __n1 >= __n2) 3168 { 3169 value_type* __p = std::__to_address(__get_pointer()); 3170 if (__n1 != __n2) 3171 { 3172 if (__n2 > __n1) 3173 __annotate_increase(__n2 - __n1); 3174 size_type __n_move = __sz - __pos - __n1; 3175 if (__n_move != 0) 3176 { 3177 if (__n1 > __n2) 3178 { 3179 traits_type::move(__p + __pos, __s, __n2); 3180 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3181 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 3182 } 3183 if (std::__is_pointer_in_range(__p + __pos + 1, __p + __sz, __s)) 3184 { 3185 if (__p + __pos + __n1 <= __s) 3186 __s += __n2 - __n1; 3187 else // __p + __pos < __s < __p + __pos + __n1 3188 { 3189 traits_type::move(__p + __pos, __s, __n1); 3190 __pos += __n1; 3191 __s += __n2; 3192 __n2 -= __n1; 3193 __n1 = 0; 3194 } 3195 } 3196 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3197 } 3198 } 3199 traits_type::move(__p + __pos, __s, __n2); 3200 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 3201 } 3202 else 3203 __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); 3204 return *this; 3205} 3206 3207template <class _CharT, class _Traits, class _Allocator> 3208_LIBCPP_CONSTEXPR_SINCE_CXX20 3209basic_string<_CharT, _Traits, _Allocator>& 3210basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) 3211{ 3212 size_type __sz = size(); 3213 if (__pos > __sz) 3214 __throw_out_of_range(); 3215 __n1 = std::min(__n1, __sz - __pos); 3216 size_type __cap = capacity(); 3217 value_type* __p; 3218 if (__cap - __sz + __n1 >= __n2) { 3219 __p = std::__to_address(__get_pointer()); 3220 if (__n1 != __n2) { 3221 if (__n2 > __n1) 3222 __annotate_increase(__n2 - __n1); 3223 size_type __n_move = __sz - __pos - __n1; 3224 if (__n_move != 0) 3225 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3226 } 3227 } else { 3228 __grow_by_without_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); 3229 __p = std::__to_address(__get_long_pointer()); 3230 } 3231 traits_type::assign(__p + __pos, __n2, __c); 3232 return __null_terminate_at(__p, __sz - (__n1 - __n2)); 3233} 3234 3235template <class _CharT, class _Traits, class _Allocator> 3236template<class _InputIterator, __enable_if_t<__has_input_iterator_category<_InputIterator>::value, int> > 3237_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3238basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, 3239 _InputIterator __j1, _InputIterator __j2) 3240{ 3241 const basic_string __temp(__j1, __j2, __alloc()); 3242 return replace(__i1, __i2, __temp); 3243} 3244 3245template <class _CharT, class _Traits, class _Allocator> 3246_LIBCPP_CONSTEXPR_SINCE_CXX20 3247basic_string<_CharT, _Traits, _Allocator>& 3248basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str, 3249 size_type __pos2, size_type __n2) 3250{ 3251 size_type __str_sz = __str.size(); 3252 if (__pos2 > __str_sz) 3253 __throw_out_of_range(); 3254 return replace(__pos1, __n1, __str.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 3255} 3256 3257template <class _CharT, class _Traits, class _Allocator> 3258template <class _Tp, 3259 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3260 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3261 int> > 3262_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 3263basic_string<_CharT, _Traits, _Allocator>::replace( 3264 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) { 3265 __self_view __sv = __t; 3266 size_type __str_sz = __sv.size(); 3267 if (__pos2 > __str_sz) 3268 __throw_out_of_range(); 3269 return replace(__pos1, __n1, __sv.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 3270} 3271 3272template <class _CharT, class _Traits, class _Allocator> 3273_LIBCPP_CONSTEXPR_SINCE_CXX20 3274basic_string<_CharT, _Traits, _Allocator>& 3275basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) 3276{ 3277 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::replace received nullptr"); 3278 return replace(__pos, __n1, __s, traits_type::length(__s)); 3279} 3280 3281// erase 3282 3283// 'externally instantiated' erase() implementation, called when __n != npos. 3284// Does not check __pos against size() 3285template <class _CharT, class _Traits, class _Allocator> 3286_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_NOINLINE 3287void 3288basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move( 3289 size_type __pos, size_type __n) 3290{ 3291 if (__n) 3292 { 3293 size_type __sz = size(); 3294 value_type* __p = std::__to_address(__get_pointer()); 3295 __n = std::min(__n, __sz - __pos); 3296 size_type __n_move = __sz - __pos - __n; 3297 if (__n_move != 0) 3298 traits_type::move(__p + __pos, __p + __pos + __n, __n_move); 3299 __null_terminate_at(__p, __sz - __n); 3300 } 3301} 3302 3303template <class _CharT, class _Traits, class _Allocator> 3304_LIBCPP_CONSTEXPR_SINCE_CXX20 3305basic_string<_CharT, _Traits, _Allocator>& 3306basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, 3307 size_type __n) { 3308 if (__pos > size()) 3309 __throw_out_of_range(); 3310 if (__n == npos) { 3311 __erase_to_end(__pos); 3312 } else { 3313 __erase_external_with_move(__pos, __n); 3314 } 3315 return *this; 3316} 3317 3318template <class _CharT, class _Traits, class _Allocator> 3319inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3320typename basic_string<_CharT, _Traits, _Allocator>::iterator 3321basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) 3322{ 3323 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS( 3324 __pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); 3325 iterator __b = begin(); 3326 size_type __r = static_cast<size_type>(__pos - __b); 3327 erase(__r, 1); 3328 return __b + static_cast<difference_type>(__r); 3329} 3330 3331template <class _CharT, class _Traits, class _Allocator> 3332inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3333typename basic_string<_CharT, _Traits, _Allocator>::iterator 3334basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) 3335{ 3336 _LIBCPP_ASSERT_VALID_INPUT_RANGE(__first <= __last, "string::erase(first, last) called with invalid range"); 3337 iterator __b = begin(); 3338 size_type __r = static_cast<size_type>(__first - __b); 3339 erase(__r, static_cast<size_type>(__last - __first)); 3340 return __b + static_cast<difference_type>(__r); 3341} 3342 3343template <class _CharT, class _Traits, class _Allocator> 3344inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3345void 3346basic_string<_CharT, _Traits, _Allocator>::pop_back() 3347{ 3348 _LIBCPP_ASSERT_VALID_ELEMENT_ACCESS(!empty(), "string::pop_back(): string is already empty"); 3349 __erase_to_end(size() - 1); 3350} 3351 3352template <class _CharT, class _Traits, class _Allocator> 3353inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3354void 3355basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT 3356{ 3357 size_type __old_size = size(); 3358 if (__is_long()) 3359 { 3360 traits_type::assign(*__get_long_pointer(), value_type()); 3361 __set_long_size(0); 3362 } 3363 else 3364 { 3365 traits_type::assign(*__get_short_pointer(), value_type()); 3366 __set_short_size(0); 3367 } 3368 __annotate_shrink(__old_size); 3369} 3370 3371template <class _CharT, class _Traits, class _Allocator> 3372_LIBCPP_CONSTEXPR_SINCE_CXX20 3373void 3374basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) 3375{ 3376 size_type __sz = size(); 3377 if (__n > __sz) 3378 append(__n - __sz, __c); 3379 else 3380 __erase_to_end(__n); 3381} 3382 3383template <class _CharT, class _Traits, class _Allocator> 3384_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 3385basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) 3386{ 3387 size_type __sz = size(); 3388 if (__n > __sz) { 3389 __append_default_init(__n - __sz); 3390 } else 3391 __erase_to_end(__n); 3392} 3393 3394template <class _CharT, class _Traits, class _Allocator> 3395_LIBCPP_CONSTEXPR_SINCE_CXX20 3396void 3397basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacity) 3398{ 3399 if (__requested_capacity > max_size()) 3400 __throw_length_error(); 3401 3402 // Make sure reserve(n) never shrinks. This is technically only required in C++20 3403 // and later (since P0966R1), however we provide consistent behavior in all Standard 3404 // modes because this function is instantiated in the shared library. 3405 if (__requested_capacity <= capacity()) 3406 return; 3407 3408 size_type __target_capacity = std::max(__requested_capacity, size()); 3409 __target_capacity = __recommend(__target_capacity); 3410 if (__target_capacity == capacity()) return; 3411 3412 __shrink_or_extend(__target_capacity); 3413} 3414 3415template <class _CharT, class _Traits, class _Allocator> 3416inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3417void 3418basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT 3419{ 3420 size_type __target_capacity = __recommend(size()); 3421 if (__target_capacity == capacity()) return; 3422 3423 __shrink_or_extend(__target_capacity); 3424} 3425 3426template <class _CharT, class _Traits, class _Allocator> 3427inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3428void 3429basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) 3430{ 3431 __annotate_delete(); 3432 size_type __cap = capacity(); 3433 size_type __sz = size(); 3434 3435 pointer __new_data, __p; 3436 bool __was_long, __now_long; 3437 if (__fits_in_sso(__target_capacity)) 3438 { 3439 __was_long = true; 3440 __now_long = false; 3441 __new_data = __get_short_pointer(); 3442 __p = __get_long_pointer(); 3443 } 3444 else 3445 { 3446 if (__target_capacity > __cap) { 3447 auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); 3448 __new_data = __allocation.ptr; 3449 __target_capacity = __allocation.count - 1; 3450 } 3451 else 3452 { 3453 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS 3454 try 3455 { 3456 #endif // _LIBCPP_HAS_NO_EXCEPTIONS 3457 auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); 3458 __new_data = __allocation.ptr; 3459 __target_capacity = __allocation.count - 1; 3460 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS 3461 } 3462 catch (...) 3463 { 3464 return; 3465 } 3466 #else // _LIBCPP_HAS_NO_EXCEPTIONS 3467 if (__new_data == nullptr) 3468 return; 3469 #endif // _LIBCPP_HAS_NO_EXCEPTIONS 3470 } 3471 __begin_lifetime(__new_data, __target_capacity + 1); 3472 __now_long = true; 3473 __was_long = __is_long(); 3474 __p = __get_pointer(); 3475 } 3476 traits_type::copy(std::__to_address(__new_data), 3477 std::__to_address(__p), size()+1); 3478 if (__was_long) 3479 __alloc_traits::deallocate(__alloc(), __p, __cap+1); 3480 if (__now_long) 3481 { 3482 __set_long_cap(__target_capacity+1); 3483 __set_long_size(__sz); 3484 __set_long_pointer(__new_data); 3485 } 3486 else 3487 __set_short_size(__sz); 3488 __annotate_new(__sz); 3489} 3490 3491template <class _CharT, class _Traits, class _Allocator> 3492_LIBCPP_CONSTEXPR_SINCE_CXX20 3493typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3494basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const 3495{ 3496 if (__n >= size()) 3497 __throw_out_of_range(); 3498 return (*this)[__n]; 3499} 3500 3501template <class _CharT, class _Traits, class _Allocator> 3502_LIBCPP_CONSTEXPR_SINCE_CXX20 3503typename basic_string<_CharT, _Traits, _Allocator>::reference 3504basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) 3505{ 3506 if (__n >= size()) 3507 __throw_out_of_range(); 3508 return (*this)[__n]; 3509} 3510 3511template <class _CharT, class _Traits, class _Allocator> 3512_LIBCPP_CONSTEXPR_SINCE_CXX20 3513typename basic_string<_CharT, _Traits, _Allocator>::size_type 3514basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const 3515{ 3516 size_type __sz = size(); 3517 if (__pos > __sz) 3518 __throw_out_of_range(); 3519 size_type __rlen = std::min(__n, __sz - __pos); 3520 traits_type::copy(__s, data() + __pos, __rlen); 3521 return __rlen; 3522} 3523 3524template <class _CharT, class _Traits, class _Allocator> 3525inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3526void 3527basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) 3528#if _LIBCPP_STD_VER >= 14 3529 _NOEXCEPT 3530#else 3531 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 3532 __is_nothrow_swappable<allocator_type>::value) 3533#endif 3534{ 3535 _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( 3536 __alloc_traits::propagate_on_container_swap::value || 3537 __alloc_traits::is_always_equal::value || 3538 __alloc() == __str.__alloc(), "swapping non-equal allocators"); 3539 if (!__is_long()) 3540 __annotate_delete(); 3541 if (this != &__str && !__str.__is_long()) 3542 __str.__annotate_delete(); 3543 std::swap(__r_.first(), __str.__r_.first()); 3544 std::__swap_allocator(__alloc(), __str.__alloc()); 3545 if (!__is_long()) 3546 __annotate_new(__get_short_size()); 3547 if (this != &__str && !__str.__is_long()) 3548 __str.__annotate_new(__str.__get_short_size()); 3549} 3550 3551// find 3552 3553template <class _Traits> 3554struct _LIBCPP_HIDDEN __traits_eq 3555{ 3556 typedef typename _Traits::char_type char_type; 3557 _LIBCPP_HIDE_FROM_ABI 3558 bool operator()(const char_type& __x, const char_type& __y) _NOEXCEPT 3559 {return _Traits::eq(__x, __y);} 3560}; 3561 3562template<class _CharT, class _Traits, class _Allocator> 3563_LIBCPP_CONSTEXPR_SINCE_CXX20 3564typename basic_string<_CharT, _Traits, _Allocator>::size_type 3565basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3566 size_type __pos, 3567 size_type __n) const _NOEXCEPT 3568{ 3569 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find(): received nullptr"); 3570 return std::__str_find<value_type, size_type, traits_type, npos> 3571 (data(), size(), __s, __pos, __n); 3572} 3573 3574template<class _CharT, class _Traits, class _Allocator> 3575inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3576typename basic_string<_CharT, _Traits, _Allocator>::size_type 3577basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, 3578 size_type __pos) const _NOEXCEPT 3579{ 3580 return std::__str_find<value_type, size_type, traits_type, npos> 3581 (data(), size(), __str.data(), __pos, __str.size()); 3582} 3583 3584template<class _CharT, class _Traits, class _Allocator> 3585template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3586_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3587basic_string<_CharT, _Traits, _Allocator>::find(const _Tp &__t, 3588 size_type __pos) const _NOEXCEPT 3589{ 3590 __self_view __sv = __t; 3591 return std::__str_find<value_type, size_type, traits_type, npos> 3592 (data(), size(), __sv.data(), __pos, __sv.size()); 3593} 3594 3595template<class _CharT, class _Traits, class _Allocator> 3596inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3597typename basic_string<_CharT, _Traits, _Allocator>::size_type 3598basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3599 size_type __pos) const _NOEXCEPT 3600{ 3601 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find(): received nullptr"); 3602 return std::__str_find<value_type, size_type, traits_type, npos> 3603 (data(), size(), __s, __pos, traits_type::length(__s)); 3604} 3605 3606template<class _CharT, class _Traits, class _Allocator> 3607_LIBCPP_CONSTEXPR_SINCE_CXX20 3608typename basic_string<_CharT, _Traits, _Allocator>::size_type 3609basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, 3610 size_type __pos) const _NOEXCEPT 3611{ 3612 return std::__str_find<value_type, size_type, traits_type, npos> 3613 (data(), size(), __c, __pos); 3614} 3615 3616// rfind 3617 3618template<class _CharT, class _Traits, class _Allocator> 3619_LIBCPP_CONSTEXPR_SINCE_CXX20 3620typename basic_string<_CharT, _Traits, _Allocator>::size_type 3621basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3622 size_type __pos, 3623 size_type __n) const _NOEXCEPT 3624{ 3625 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); 3626 return std::__str_rfind<value_type, size_type, traits_type, npos> 3627 (data(), size(), __s, __pos, __n); 3628} 3629 3630template<class _CharT, class _Traits, class _Allocator> 3631inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3632typename basic_string<_CharT, _Traits, _Allocator>::size_type 3633basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, 3634 size_type __pos) const _NOEXCEPT 3635{ 3636 return std::__str_rfind<value_type, size_type, traits_type, npos> 3637 (data(), size(), __str.data(), __pos, __str.size()); 3638} 3639 3640template<class _CharT, class _Traits, class _Allocator> 3641template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3642_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3643basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, 3644 size_type __pos) const _NOEXCEPT 3645{ 3646 __self_view __sv = __t; 3647 return std::__str_rfind<value_type, size_type, traits_type, npos> 3648 (data(), size(), __sv.data(), __pos, __sv.size()); 3649} 3650 3651template<class _CharT, class _Traits, class _Allocator> 3652inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3653typename basic_string<_CharT, _Traits, _Allocator>::size_type 3654basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3655 size_type __pos) const _NOEXCEPT 3656{ 3657 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::rfind(): received nullptr"); 3658 return std::__str_rfind<value_type, size_type, traits_type, npos> 3659 (data(), size(), __s, __pos, traits_type::length(__s)); 3660} 3661 3662template<class _CharT, class _Traits, class _Allocator> 3663_LIBCPP_CONSTEXPR_SINCE_CXX20 3664typename basic_string<_CharT, _Traits, _Allocator>::size_type 3665basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, 3666 size_type __pos) const _NOEXCEPT 3667{ 3668 return std::__str_rfind<value_type, size_type, traits_type, npos> 3669 (data(), size(), __c, __pos); 3670} 3671 3672// find_first_of 3673 3674template<class _CharT, class _Traits, class _Allocator> 3675_LIBCPP_CONSTEXPR_SINCE_CXX20 3676typename basic_string<_CharT, _Traits, _Allocator>::size_type 3677basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3678 size_type __pos, 3679 size_type __n) const _NOEXCEPT 3680{ 3681 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); 3682 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3683 (data(), size(), __s, __pos, __n); 3684} 3685 3686template<class _CharT, class _Traits, class _Allocator> 3687inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3688typename basic_string<_CharT, _Traits, _Allocator>::size_type 3689basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, 3690 size_type __pos) const _NOEXCEPT 3691{ 3692 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3693 (data(), size(), __str.data(), __pos, __str.size()); 3694} 3695 3696template<class _CharT, class _Traits, class _Allocator> 3697template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3698_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3699basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, 3700 size_type __pos) const _NOEXCEPT 3701{ 3702 __self_view __sv = __t; 3703 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3704 (data(), size(), __sv.data(), __pos, __sv.size()); 3705} 3706 3707template<class _CharT, class _Traits, class _Allocator> 3708inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3709typename basic_string<_CharT, _Traits, _Allocator>::size_type 3710basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3711 size_type __pos) const _NOEXCEPT 3712{ 3713 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_first_of(): received nullptr"); 3714 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3715 (data(), size(), __s, __pos, traits_type::length(__s)); 3716} 3717 3718template<class _CharT, class _Traits, class _Allocator> 3719inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3720typename basic_string<_CharT, _Traits, _Allocator>::size_type 3721basic_string<_CharT, _Traits, _Allocator>::find_first_of(value_type __c, 3722 size_type __pos) const _NOEXCEPT 3723{ 3724 return find(__c, __pos); 3725} 3726 3727// find_last_of 3728 3729template<class _CharT, class _Traits, class _Allocator> 3730inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3731typename basic_string<_CharT, _Traits, _Allocator>::size_type 3732basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3733 size_type __pos, 3734 size_type __n) const _NOEXCEPT 3735{ 3736 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); 3737 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3738 (data(), size(), __s, __pos, __n); 3739} 3740 3741template<class _CharT, class _Traits, class _Allocator> 3742inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3743typename basic_string<_CharT, _Traits, _Allocator>::size_type 3744basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, 3745 size_type __pos) const _NOEXCEPT 3746{ 3747 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3748 (data(), size(), __str.data(), __pos, __str.size()); 3749} 3750 3751template<class _CharT, class _Traits, class _Allocator> 3752template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3753_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3754basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, 3755 size_type __pos) const _NOEXCEPT 3756{ 3757 __self_view __sv = __t; 3758 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3759 (data(), size(), __sv.data(), __pos, __sv.size()); 3760} 3761 3762template<class _CharT, class _Traits, class _Allocator> 3763inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3764typename basic_string<_CharT, _Traits, _Allocator>::size_type 3765basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3766 size_type __pos) const _NOEXCEPT 3767{ 3768 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_last_of(): received nullptr"); 3769 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3770 (data(), size(), __s, __pos, traits_type::length(__s)); 3771} 3772 3773template<class _CharT, class _Traits, class _Allocator> 3774inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3775typename basic_string<_CharT, _Traits, _Allocator>::size_type 3776basic_string<_CharT, _Traits, _Allocator>::find_last_of(value_type __c, 3777 size_type __pos) const _NOEXCEPT 3778{ 3779 return rfind(__c, __pos); 3780} 3781 3782// find_first_not_of 3783 3784template<class _CharT, class _Traits, class _Allocator> 3785_LIBCPP_CONSTEXPR_SINCE_CXX20 3786typename basic_string<_CharT, _Traits, _Allocator>::size_type 3787basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3788 size_type __pos, 3789 size_type __n) const _NOEXCEPT 3790{ 3791 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); 3792 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3793 (data(), size(), __s, __pos, __n); 3794} 3795 3796template<class _CharT, class _Traits, class _Allocator> 3797inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3798typename basic_string<_CharT, _Traits, _Allocator>::size_type 3799basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const basic_string& __str, 3800 size_type __pos) const _NOEXCEPT 3801{ 3802 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3803 (data(), size(), __str.data(), __pos, __str.size()); 3804} 3805 3806template<class _CharT, class _Traits, class _Allocator> 3807template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3808_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3809basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, 3810 size_type __pos) const _NOEXCEPT 3811{ 3812 __self_view __sv = __t; 3813 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3814 (data(), size(), __sv.data(), __pos, __sv.size()); 3815} 3816 3817template<class _CharT, class _Traits, class _Allocator> 3818inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3819typename basic_string<_CharT, _Traits, _Allocator>::size_type 3820basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3821 size_type __pos) const _NOEXCEPT 3822{ 3823 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_first_not_of(): received nullptr"); 3824 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3825 (data(), size(), __s, __pos, traits_type::length(__s)); 3826} 3827 3828template<class _CharT, class _Traits, class _Allocator> 3829inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3830typename basic_string<_CharT, _Traits, _Allocator>::size_type 3831basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(value_type __c, 3832 size_type __pos) const _NOEXCEPT 3833{ 3834 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3835 (data(), size(), __c, __pos); 3836} 3837 3838// find_last_not_of 3839 3840template<class _CharT, class _Traits, class _Allocator> 3841_LIBCPP_CONSTEXPR_SINCE_CXX20 3842typename basic_string<_CharT, _Traits, _Allocator>::size_type 3843basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3844 size_type __pos, 3845 size_type __n) const _NOEXCEPT 3846{ 3847 _LIBCPP_ASSERT_NON_NULL(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); 3848 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3849 (data(), size(), __s, __pos, __n); 3850} 3851 3852template<class _CharT, class _Traits, class _Allocator> 3853inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3854typename basic_string<_CharT, _Traits, _Allocator>::size_type 3855basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const basic_string& __str, 3856 size_type __pos) const _NOEXCEPT 3857{ 3858 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3859 (data(), size(), __str.data(), __pos, __str.size()); 3860} 3861 3862template<class _CharT, class _Traits, class _Allocator> 3863template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3864_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3865basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, 3866 size_type __pos) const _NOEXCEPT 3867{ 3868 __self_view __sv = __t; 3869 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3870 (data(), size(), __sv.data(), __pos, __sv.size()); 3871} 3872 3873template<class _CharT, class _Traits, class _Allocator> 3874inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3875typename basic_string<_CharT, _Traits, _Allocator>::size_type 3876basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3877 size_type __pos) const _NOEXCEPT 3878{ 3879 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::find_last_not_of(): received nullptr"); 3880 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3881 (data(), size(), __s, __pos, traits_type::length(__s)); 3882} 3883 3884template<class _CharT, class _Traits, class _Allocator> 3885inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3886typename basic_string<_CharT, _Traits, _Allocator>::size_type 3887basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(value_type __c, 3888 size_type __pos) const _NOEXCEPT 3889{ 3890 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3891 (data(), size(), __c, __pos); 3892} 3893 3894// compare 3895 3896template <class _CharT, class _Traits, class _Allocator> 3897template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3898_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3899basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const _NOEXCEPT 3900{ 3901 __self_view __sv = __t; 3902 size_t __lhs_sz = size(); 3903 size_t __rhs_sz = __sv.size(); 3904 int __result = traits_type::compare(data(), __sv.data(), 3905 std::min(__lhs_sz, __rhs_sz)); 3906 if (__result != 0) 3907 return __result; 3908 if (__lhs_sz < __rhs_sz) 3909 return -1; 3910 if (__lhs_sz > __rhs_sz) 3911 return 1; 3912 return 0; 3913} 3914 3915template <class _CharT, class _Traits, class _Allocator> 3916inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3917int 3918basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT 3919{ 3920 return compare(__self_view(__str)); 3921} 3922 3923template <class _CharT, class _Traits, class _Allocator> 3924inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3925int 3926basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3927 size_type __n1, 3928 const value_type* __s, 3929 size_type __n2) const 3930{ 3931 _LIBCPP_ASSERT_NON_NULL(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); 3932 size_type __sz = size(); 3933 if (__pos1 > __sz || __n2 == npos) 3934 __throw_out_of_range(); 3935 size_type __rlen = std::min(__n1, __sz - __pos1); 3936 int __r = traits_type::compare(data() + __pos1, __s, std::min(__rlen, __n2)); 3937 if (__r == 0) 3938 { 3939 if (__rlen < __n2) 3940 __r = -1; 3941 else if (__rlen > __n2) 3942 __r = 1; 3943 } 3944 return __r; 3945} 3946 3947template <class _CharT, class _Traits, class _Allocator> 3948template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3949_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3950basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3951 size_type __n1, 3952 const _Tp& __t) const 3953{ 3954 __self_view __sv = __t; 3955 return compare(__pos1, __n1, __sv.data(), __sv.size()); 3956} 3957 3958template <class _CharT, class _Traits, class _Allocator> 3959inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3960int 3961basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3962 size_type __n1, 3963 const basic_string& __str) const 3964{ 3965 return compare(__pos1, __n1, __str.data(), __str.size()); 3966} 3967 3968template <class _CharT, class _Traits, class _Allocator> 3969template <class _Tp, 3970 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3971 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3972 int> > 3973_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3974 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) const { 3975 __self_view __sv = __t; 3976 return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 3977} 3978 3979template <class _CharT, class _Traits, class _Allocator> 3980_LIBCPP_CONSTEXPR_SINCE_CXX20 3981int 3982basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3983 size_type __n1, 3984 const basic_string& __str, 3985 size_type __pos2, 3986 size_type __n2) const 3987{ 3988 return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); 3989} 3990 3991template <class _CharT, class _Traits, class _Allocator> 3992_LIBCPP_CONSTEXPR_SINCE_CXX20 3993int 3994basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT 3995{ 3996 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::compare(): received nullptr"); 3997 return compare(0, npos, __s, traits_type::length(__s)); 3998} 3999 4000template <class _CharT, class _Traits, class _Allocator> 4001_LIBCPP_CONSTEXPR_SINCE_CXX20 4002int 4003basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 4004 size_type __n1, 4005 const value_type* __s) const 4006{ 4007 _LIBCPP_ASSERT_NON_NULL(__s != nullptr, "string::compare(): received nullptr"); 4008 return compare(__pos1, __n1, __s, traits_type::length(__s)); 4009} 4010 4011// __invariants 4012 4013template<class _CharT, class _Traits, class _Allocator> 4014inline _LIBCPP_CONSTEXPR_SINCE_CXX20 4015bool 4016basic_string<_CharT, _Traits, _Allocator>::__invariants() const 4017{ 4018 if (size() > capacity()) 4019 return false; 4020 if (capacity() < __min_cap - 1) 4021 return false; 4022 if (data() == nullptr) 4023 return false; 4024 if (!_Traits::eq(data()[size()], value_type())) 4025 return false; 4026 return true; 4027} 4028 4029// __clear_and_shrink 4030 4031template<class _CharT, class _Traits, class _Allocator> 4032inline _LIBCPP_CONSTEXPR_SINCE_CXX20 4033void 4034basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT 4035{ 4036 clear(); 4037 if (__is_long()) { 4038 __annotate_delete(); 4039 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1); 4040 __r_.first() = __rep(); 4041 } 4042} 4043 4044// operator== 4045 4046template<class _CharT, class _Traits, class _Allocator> 4047inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 4048bool 4049operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4050 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4051{ 4052#if _LIBCPP_STD_VER >= 20 4053 return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); 4054#else 4055 size_t __lhs_sz = __lhs.size(); 4056 return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), 4057 __rhs.data(), 4058 __lhs_sz) == 0; 4059#endif 4060} 4061 4062template<class _Allocator> 4063inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 4064bool 4065operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, 4066 const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT 4067{ 4068 size_t __lhs_sz = __lhs.size(); 4069 if (__lhs_sz != __rhs.size()) 4070 return false; 4071 const char* __lp = __lhs.data(); 4072 const char* __rp = __rhs.data(); 4073 if (__lhs.__is_long()) 4074 return char_traits<char>::compare(__lp, __rp, __lhs_sz) == 0; 4075 for (; __lhs_sz != 0; --__lhs_sz, ++__lp, ++__rp) 4076 if (*__lp != *__rp) 4077 return false; 4078 return true; 4079} 4080 4081#if _LIBCPP_STD_VER <= 17 4082template<class _CharT, class _Traits, class _Allocator> 4083inline _LIBCPP_HIDE_FROM_ABI 4084bool 4085operator==(const _CharT* __lhs, 4086 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4087{ 4088 typedef basic_string<_CharT, _Traits, _Allocator> _String; 4089 _LIBCPP_ASSERT_NON_NULL(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); 4090 size_t __lhs_len = _Traits::length(__lhs); 4091 if (__lhs_len != __rhs.size()) return false; 4092 return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; 4093} 4094#endif // _LIBCPP_STD_VER <= 17 4095 4096template<class _CharT, class _Traits, class _Allocator> 4097inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 4098bool 4099operator==(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 4100 const _CharT* __rhs) _NOEXCEPT 4101{ 4102#if _LIBCPP_STD_VER >= 20 4103 return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); 4104#else 4105 typedef basic_string<_CharT, _Traits, _Allocator> _String; 4106 _LIBCPP_ASSERT_NON_NULL(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); 4107 size_t __rhs_len = _Traits::length(__rhs); 4108 if (__rhs_len != __lhs.size()) return false; 4109 return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; 4110#endif 4111} 4112 4113#if _LIBCPP_STD_VER >= 20 4114 4115template <class _CharT, class _Traits, class _Allocator> 4116_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>( 4117 const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4118 const basic_string<_CharT, _Traits, _Allocator>& __rhs) noexcept { 4119 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 4120} 4121 4122template <class _CharT, class _Traits, class _Allocator> 4123_LIBCPP_HIDE_FROM_ABI constexpr auto 4124operator<=>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) { 4125 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 4126} 4127 4128#else // _LIBCPP_STD_VER >= 20 4129 4130template<class _CharT, class _Traits, class _Allocator> 4131inline _LIBCPP_HIDE_FROM_ABI 4132bool 4133operator!=(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 4134 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4135{ 4136 return !(__lhs == __rhs); 4137} 4138 4139template<class _CharT, class _Traits, class _Allocator> 4140inline _LIBCPP_HIDE_FROM_ABI 4141bool 4142operator!=(const _CharT* __lhs, 4143 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4144{ 4145 return !(__lhs == __rhs); 4146} 4147 4148template<class _CharT, class _Traits, class _Allocator> 4149inline _LIBCPP_HIDE_FROM_ABI 4150bool 4151operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4152 const _CharT* __rhs) _NOEXCEPT 4153{ 4154 return !(__lhs == __rhs); 4155} 4156 4157// operator< 4158 4159template<class _CharT, class _Traits, class _Allocator> 4160inline _LIBCPP_HIDE_FROM_ABI 4161bool 4162operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4163 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4164{ 4165 return __lhs.compare(__rhs) < 0; 4166} 4167 4168template<class _CharT, class _Traits, class _Allocator> 4169inline _LIBCPP_HIDE_FROM_ABI 4170bool 4171operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4172 const _CharT* __rhs) _NOEXCEPT 4173{ 4174 return __lhs.compare(__rhs) < 0; 4175} 4176 4177template<class _CharT, class _Traits, class _Allocator> 4178inline _LIBCPP_HIDE_FROM_ABI 4179bool 4180operator< (const _CharT* __lhs, 4181 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4182{ 4183 return __rhs.compare(__lhs) > 0; 4184} 4185 4186// operator> 4187 4188template<class _CharT, class _Traits, class _Allocator> 4189inline _LIBCPP_HIDE_FROM_ABI 4190bool 4191operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4192 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4193{ 4194 return __rhs < __lhs; 4195} 4196 4197template<class _CharT, class _Traits, class _Allocator> 4198inline _LIBCPP_HIDE_FROM_ABI 4199bool 4200operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4201 const _CharT* __rhs) _NOEXCEPT 4202{ 4203 return __rhs < __lhs; 4204} 4205 4206template<class _CharT, class _Traits, class _Allocator> 4207inline _LIBCPP_HIDE_FROM_ABI 4208bool 4209operator> (const _CharT* __lhs, 4210 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4211{ 4212 return __rhs < __lhs; 4213} 4214 4215// operator<= 4216 4217template<class _CharT, class _Traits, class _Allocator> 4218inline _LIBCPP_HIDE_FROM_ABI 4219bool 4220operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4221 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4222{ 4223 return !(__rhs < __lhs); 4224} 4225 4226template<class _CharT, class _Traits, class _Allocator> 4227inline _LIBCPP_HIDE_FROM_ABI 4228bool 4229operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4230 const _CharT* __rhs) _NOEXCEPT 4231{ 4232 return !(__rhs < __lhs); 4233} 4234 4235template<class _CharT, class _Traits, class _Allocator> 4236inline _LIBCPP_HIDE_FROM_ABI 4237bool 4238operator<=(const _CharT* __lhs, 4239 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4240{ 4241 return !(__rhs < __lhs); 4242} 4243 4244// operator>= 4245 4246template<class _CharT, class _Traits, class _Allocator> 4247inline _LIBCPP_HIDE_FROM_ABI 4248bool 4249operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4250 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4251{ 4252 return !(__lhs < __rhs); 4253} 4254 4255template<class _CharT, class _Traits, class _Allocator> 4256inline _LIBCPP_HIDE_FROM_ABI 4257bool 4258operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4259 const _CharT* __rhs) _NOEXCEPT 4260{ 4261 return !(__lhs < __rhs); 4262} 4263 4264template<class _CharT, class _Traits, class _Allocator> 4265inline _LIBCPP_HIDE_FROM_ABI 4266bool 4267operator>=(const _CharT* __lhs, 4268 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4269{ 4270 return !(__lhs < __rhs); 4271} 4272#endif // _LIBCPP_STD_VER >= 20 4273 4274// operator + 4275 4276template<class _CharT, class _Traits, class _Allocator> 4277_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4278basic_string<_CharT, _Traits, _Allocator> 4279operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4280 const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4281{ 4282 using _String = basic_string<_CharT, _Traits, _Allocator>; 4283 auto __lhs_sz = __lhs.size(); 4284 auto __rhs_sz = __rhs.size(); 4285 _String __r(__uninitialized_size_tag(), 4286 __lhs_sz + __rhs_sz, 4287 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4288 auto __ptr = std::__to_address(__r.__get_pointer()); 4289 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4290 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4291 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4292 return __r; 4293} 4294 4295template<class _CharT, class _Traits, class _Allocator> 4296_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 4297basic_string<_CharT, _Traits, _Allocator> 4298operator+(const _CharT* __lhs , const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4299{ 4300 using _String = basic_string<_CharT, _Traits, _Allocator>; 4301 auto __lhs_sz = _Traits::length(__lhs); 4302 auto __rhs_sz = __rhs.size(); 4303 _String __r(__uninitialized_size_tag(), 4304 __lhs_sz + __rhs_sz, 4305 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4306 auto __ptr = std::__to_address(__r.__get_pointer()); 4307 _Traits::copy(__ptr, __lhs, __lhs_sz); 4308 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4309 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4310 return __r; 4311} 4312 4313template<class _CharT, class _Traits, class _Allocator> 4314_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4315basic_string<_CharT, _Traits, _Allocator> 4316operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4317{ 4318 using _String = basic_string<_CharT, _Traits, _Allocator>; 4319 typename _String::size_type __rhs_sz = __rhs.size(); 4320 _String __r(__uninitialized_size_tag(), 4321 __rhs_sz + 1, 4322 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4323 auto __ptr = std::__to_address(__r.__get_pointer()); 4324 _Traits::assign(__ptr, 1, __lhs); 4325 _Traits::copy(__ptr + 1, __rhs.data(), __rhs_sz); 4326 _Traits::assign(__ptr + 1 + __rhs_sz, 1, _CharT()); 4327 return __r; 4328} 4329 4330template<class _CharT, class _Traits, class _Allocator> 4331inline _LIBCPP_CONSTEXPR_SINCE_CXX20 4332basic_string<_CharT, _Traits, _Allocator> 4333operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) 4334{ 4335 using _String = basic_string<_CharT, _Traits, _Allocator>; 4336 typename _String::size_type __lhs_sz = __lhs.size(); 4337 typename _String::size_type __rhs_sz = _Traits::length(__rhs); 4338 _String __r(__uninitialized_size_tag(), 4339 __lhs_sz + __rhs_sz, 4340 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4341 auto __ptr = std::__to_address(__r.__get_pointer()); 4342 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4343 _Traits::copy(__ptr + __lhs_sz, __rhs, __rhs_sz); 4344 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4345 return __r; 4346} 4347 4348template<class _CharT, class _Traits, class _Allocator> 4349_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4350basic_string<_CharT, _Traits, _Allocator> 4351operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) 4352{ 4353 using _String = basic_string<_CharT, _Traits, _Allocator>; 4354 typename _String::size_type __lhs_sz = __lhs.size(); 4355 _String __r(__uninitialized_size_tag(), 4356 __lhs_sz + 1, 4357 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4358 auto __ptr = std::__to_address(__r.__get_pointer()); 4359 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4360 _Traits::assign(__ptr + __lhs_sz, 1, __rhs); 4361 _Traits::assign(__ptr + 1 + __lhs_sz, 1, _CharT()); 4362 return __r; 4363} 4364 4365#ifndef _LIBCPP_CXX03_LANG 4366 4367template<class _CharT, class _Traits, class _Allocator> 4368inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4369basic_string<_CharT, _Traits, _Allocator> 4370operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4371{ 4372 return std::move(__lhs.append(__rhs)); 4373} 4374 4375template<class _CharT, class _Traits, class _Allocator> 4376inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4377basic_string<_CharT, _Traits, _Allocator> 4378operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4379{ 4380 return std::move(__rhs.insert(0, __lhs)); 4381} 4382 4383template<class _CharT, class _Traits, class _Allocator> 4384inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4385basic_string<_CharT, _Traits, _Allocator> 4386operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4387{ 4388 return std::move(__lhs.append(__rhs)); 4389} 4390 4391template<class _CharT, class _Traits, class _Allocator> 4392inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4393basic_string<_CharT, _Traits, _Allocator> 4394operator+(const _CharT* __lhs , basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4395{ 4396 return std::move(__rhs.insert(0, __lhs)); 4397} 4398 4399template<class _CharT, class _Traits, class _Allocator> 4400inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4401basic_string<_CharT, _Traits, _Allocator> 4402operator+(_CharT __lhs, basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4403{ 4404 __rhs.insert(__rhs.begin(), __lhs); 4405 return std::move(__rhs); 4406} 4407 4408template<class _CharT, class _Traits, class _Allocator> 4409inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4410basic_string<_CharT, _Traits, _Allocator> 4411operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) 4412{ 4413 return std::move(__lhs.append(__rhs)); 4414} 4415 4416template<class _CharT, class _Traits, class _Allocator> 4417inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4418basic_string<_CharT, _Traits, _Allocator> 4419operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) 4420{ 4421 __lhs.push_back(__rhs); 4422 return std::move(__lhs); 4423} 4424 4425#endif // _LIBCPP_CXX03_LANG 4426 4427// swap 4428 4429template<class _CharT, class _Traits, class _Allocator> 4430inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4431void 4432swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, 4433 basic_string<_CharT, _Traits, _Allocator>& __rhs) 4434 _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) 4435{ 4436 __lhs.swap(__rhs); 4437} 4438 4439_LIBCPP_EXPORTED_FROM_ABI int stoi (const string& __str, size_t* __idx = nullptr, int __base = 10); 4440_LIBCPP_EXPORTED_FROM_ABI long stol (const string& __str, size_t* __idx = nullptr, int __base = 10); 4441_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul (const string& __str, size_t* __idx = nullptr, int __base = 10); 4442_LIBCPP_EXPORTED_FROM_ABI long long stoll (const string& __str, size_t* __idx = nullptr, int __base = 10); 4443_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const string& __str, size_t* __idx = nullptr, int __base = 10); 4444 4445_LIBCPP_EXPORTED_FROM_ABI float stof (const string& __str, size_t* __idx = nullptr); 4446_LIBCPP_EXPORTED_FROM_ABI double stod (const string& __str, size_t* __idx = nullptr); 4447_LIBCPP_EXPORTED_FROM_ABI long double stold(const string& __str, size_t* __idx = nullptr); 4448 4449_LIBCPP_EXPORTED_FROM_ABI string to_string(int __val); 4450_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned __val); 4451_LIBCPP_EXPORTED_FROM_ABI string to_string(long __val); 4452_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long __val); 4453_LIBCPP_EXPORTED_FROM_ABI string to_string(long long __val); 4454_LIBCPP_EXPORTED_FROM_ABI string to_string(unsigned long long __val); 4455_LIBCPP_EXPORTED_FROM_ABI string to_string(float __val); 4456_LIBCPP_EXPORTED_FROM_ABI string to_string(double __val); 4457_LIBCPP_EXPORTED_FROM_ABI string to_string(long double __val); 4458 4459#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4460_LIBCPP_EXPORTED_FROM_ABI int stoi (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4461_LIBCPP_EXPORTED_FROM_ABI long stol (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4462_LIBCPP_EXPORTED_FROM_ABI unsigned long stoul (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4463_LIBCPP_EXPORTED_FROM_ABI long long stoll (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4464_LIBCPP_EXPORTED_FROM_ABI unsigned long long stoull(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4465 4466_LIBCPP_EXPORTED_FROM_ABI float stof (const wstring& __str, size_t* __idx = nullptr); 4467_LIBCPP_EXPORTED_FROM_ABI double stod (const wstring& __str, size_t* __idx = nullptr); 4468_LIBCPP_EXPORTED_FROM_ABI long double stold(const wstring& __str, size_t* __idx = nullptr); 4469 4470_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(int __val); 4471_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned __val); 4472_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long __val); 4473_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long __val); 4474_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long long __val); 4475_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(unsigned long long __val); 4476_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(float __val); 4477_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(double __val); 4478_LIBCPP_EXPORTED_FROM_ABI wstring to_wstring(long double __val); 4479#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS 4480 4481template<class _CharT, class _Traits, class _Allocator> 4482_LIBCPP_TEMPLATE_DATA_VIS 4483const typename basic_string<_CharT, _Traits, _Allocator>::size_type 4484 basic_string<_CharT, _Traits, _Allocator>::npos; 4485 4486template <class _CharT, class _Allocator> 4487struct __string_hash : public __unary_function<basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> { 4488 _LIBCPP_HIDE_FROM_ABI size_t 4489 operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT { 4490 return std::__do_string_hash(__val.data(), __val.data() + __val.size()); 4491 } 4492}; 4493 4494template <class _Allocator> 4495struct hash<basic_string<char, char_traits<char>, _Allocator> > : __string_hash<char, _Allocator> {}; 4496 4497#ifndef _LIBCPP_HAS_NO_CHAR8_T 4498template <class _Allocator> 4499struct hash<basic_string<char8_t, char_traits<char8_t>, _Allocator> > : __string_hash<char8_t, _Allocator> {}; 4500#endif 4501 4502template <class _Allocator> 4503struct hash<basic_string<char16_t, char_traits<char16_t>, _Allocator> > : __string_hash<char16_t, _Allocator> {}; 4504 4505template <class _Allocator> 4506struct hash<basic_string<char32_t, char_traits<char32_t>, _Allocator> > : __string_hash<char32_t, _Allocator> {}; 4507 4508#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4509template <class _Allocator> 4510struct hash<basic_string<wchar_t, char_traits<wchar_t>, _Allocator> > : __string_hash<wchar_t, _Allocator> {}; 4511#endif 4512 4513template<class _CharT, class _Traits, class _Allocator> 4514_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>& 4515operator<<(basic_ostream<_CharT, _Traits>& __os, 4516 const basic_string<_CharT, _Traits, _Allocator>& __str); 4517 4518template<class _CharT, class _Traits, class _Allocator> 4519_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4520operator>>(basic_istream<_CharT, _Traits>& __is, 4521 basic_string<_CharT, _Traits, _Allocator>& __str); 4522 4523template<class _CharT, class _Traits, class _Allocator> 4524_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4525getline(basic_istream<_CharT, _Traits>& __is, 4526 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4527 4528template<class _CharT, class _Traits, class _Allocator> 4529inline _LIBCPP_HIDE_FROM_ABI 4530basic_istream<_CharT, _Traits>& 4531getline(basic_istream<_CharT, _Traits>& __is, 4532 basic_string<_CharT, _Traits, _Allocator>& __str); 4533 4534template<class _CharT, class _Traits, class _Allocator> 4535inline _LIBCPP_HIDE_FROM_ABI 4536basic_istream<_CharT, _Traits>& 4537getline(basic_istream<_CharT, _Traits>&& __is, 4538 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4539 4540template<class _CharT, class _Traits, class _Allocator> 4541inline _LIBCPP_HIDE_FROM_ABI 4542basic_istream<_CharT, _Traits>& 4543getline(basic_istream<_CharT, _Traits>&& __is, 4544 basic_string<_CharT, _Traits, _Allocator>& __str); 4545 4546#if _LIBCPP_STD_VER >= 20 4547template <class _CharT, class _Traits, class _Allocator, class _Up> 4548inline _LIBCPP_HIDE_FROM_ABI 4549 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4550 erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { 4551 auto __old_size = __str.size(); 4552 __str.erase(std::remove(__str.begin(), __str.end(), __v), __str.end()); 4553 return __old_size - __str.size(); 4554} 4555 4556template <class _CharT, class _Traits, class _Allocator, class _Predicate> 4557inline _LIBCPP_HIDE_FROM_ABI 4558 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4559 erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, 4560 _Predicate __pred) { 4561 auto __old_size = __str.size(); 4562 __str.erase(std::remove_if(__str.begin(), __str.end(), __pred), 4563 __str.end()); 4564 return __old_size - __str.size(); 4565} 4566#endif 4567 4568#if _LIBCPP_STD_VER >= 14 4569// Literal suffixes for basic_string [basic.string.literals] 4570inline namespace literals 4571{ 4572 inline namespace string_literals 4573 { 4574 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4575 basic_string<char> operator""s( const char *__str, size_t __len ) 4576 { 4577 return basic_string<char> (__str, __len); 4578 } 4579 4580#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4581 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4582 basic_string<wchar_t> operator""s( const wchar_t *__str, size_t __len ) 4583 { 4584 return basic_string<wchar_t> (__str, __len); 4585 } 4586#endif 4587 4588#ifndef _LIBCPP_HAS_NO_CHAR8_T 4589 inline _LIBCPP_HIDE_FROM_ABI constexpr 4590 basic_string<char8_t> operator""s(const char8_t *__str, size_t __len) 4591 { 4592 return basic_string<char8_t> (__str, __len); 4593 } 4594#endif 4595 4596 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4597 basic_string<char16_t> operator""s( const char16_t *__str, size_t __len ) 4598 { 4599 return basic_string<char16_t> (__str, __len); 4600 } 4601 4602 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4603 basic_string<char32_t> operator""s( const char32_t *__str, size_t __len ) 4604 { 4605 return basic_string<char32_t> (__str, __len); 4606 } 4607 } // namespace string_literals 4608} // namespace literals 4609 4610#if _LIBCPP_STD_VER >= 20 4611template <> 4612inline constexpr bool __format::__enable_insertable<std::basic_string<char>> = true; 4613#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4614template <> 4615inline constexpr bool __format::__enable_insertable<std::basic_string<wchar_t>> = true; 4616#endif 4617#endif 4618 4619#endif 4620 4621_LIBCPP_END_NAMESPACE_STD 4622 4623_LIBCPP_POP_MACROS 4624 4625#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 4626# include <algorithm> 4627# include <concepts> 4628# include <cstdlib> 4629# include <iterator> 4630# include <new> 4631# include <type_traits> 4632# include <typeinfo> 4633# include <utility> 4634#endif 4635 4636#endif // _LIBCPP_STRING 4637