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/* 14 string synopsis 15 16#include <compare> 17#include <initializer_list> 18 19namespace std 20{ 21 22template <class stateT> 23class fpos 24{ 25private: 26 stateT st; 27public: 28 fpos(streamoff = streamoff()); 29 30 operator streamoff() const; 31 32 stateT state() const; 33 void state(stateT); 34 35 fpos& operator+=(streamoff); 36 fpos operator+ (streamoff) const; 37 fpos& operator-=(streamoff); 38 fpos operator- (streamoff) const; 39}; 40 41template <class stateT> streamoff operator-(const fpos<stateT>& x, const fpos<stateT>& y); 42 43template <class stateT> bool operator==(const fpos<stateT>& x, const fpos<stateT>& y); 44template <class stateT> bool operator!=(const fpos<stateT>& x, const fpos<stateT>& y); 45 46template <class charT> 47struct char_traits 48{ 49 using char_type = charT; 50 using int_type = ...; 51 using off_type = streamoff; 52 using pos_type = streampos; 53 using state_type = mbstate_t; 54 using comparison_category = strong_ordering; // Since C++20 only for the specializations 55 // char, wchar_t, char8_t, char16_t, and char32_t. 56 57 static void assign(char_type& c1, const char_type& c2) noexcept; 58 static constexpr bool eq(char_type c1, char_type c2) noexcept; 59 static constexpr bool lt(char_type c1, char_type c2) noexcept; 60 61 static int compare(const char_type* s1, const char_type* s2, size_t n); 62 static size_t length(const char_type* s); 63 static const char_type* find(const char_type* s, size_t n, const char_type& a); 64 static char_type* move(char_type* s1, const char_type* s2, size_t n); 65 static char_type* copy(char_type* s1, const char_type* s2, size_t n); 66 static char_type* assign(char_type* s, size_t n, char_type a); 67 68 static constexpr int_type not_eof(int_type c) noexcept; 69 static constexpr char_type to_char_type(int_type c) noexcept; 70 static constexpr int_type to_int_type(char_type c) noexcept; 71 static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept; 72 static constexpr int_type eof() noexcept; 73}; 74 75template <> struct char_traits<char>; 76template <> struct char_traits<wchar_t>; 77template <> struct char_traits<char8_t>; // C++20 78template <> struct char_traits<char16_t>; 79template <> struct char_traits<char32_t>; 80 81template<class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> > 82class basic_string 83{ 84public: 85// types: 86 typedef traits traits_type; 87 typedef typename traits_type::char_type value_type; 88 typedef Allocator allocator_type; 89 typedef typename allocator_type::size_type size_type; 90 typedef typename allocator_type::difference_type difference_type; 91 typedef typename allocator_type::reference reference; 92 typedef typename allocator_type::const_reference const_reference; 93 typedef typename allocator_type::pointer pointer; 94 typedef typename allocator_type::const_pointer const_pointer; 95 typedef implementation-defined iterator; 96 typedef implementation-defined const_iterator; 97 typedef std::reverse_iterator<iterator> reverse_iterator; 98 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 99 100 static const size_type npos = -1; 101 102 basic_string() 103 noexcept(is_nothrow_default_constructible<allocator_type>::value); // constexpr since C++20 104 explicit basic_string(const allocator_type& a); // constexpr since C++20 105 basic_string(const basic_string& str); // constexpr since C++20 106 basic_string(basic_string&& str) 107 noexcept(is_nothrow_move_constructible<allocator_type>::value); // constexpr since C++20 108 basic_string(const basic_string& str, size_type pos, 109 const allocator_type& a = allocator_type()); // constexpr since C++20 110 basic_string(const basic_string& str, size_type pos, size_type n, 111 const Allocator& a = Allocator()); // constexpr since C++20 112 constexpr basic_string( 113 basic_string&& str, size_type pos, const Allocator& a = Allocator()); // since C++23 114 constexpr basic_string( 115 basic_string&& str, size_type pos, size_type n, const Allocator& a = Allocator()); // since C++23 116 template<class T> 117 basic_string(const T& t, size_type pos, size_type n, const Allocator& a = Allocator()); // C++17, constexpr since C++20 118 template <class T> 119 explicit basic_string(const T& t, const Allocator& a = Allocator()); // C++17, constexpr since C++20 120 basic_string(const value_type* s, const allocator_type& a = allocator_type()); // constexpr since C++20 121 basic_string(const value_type* s, size_type n, const allocator_type& a = allocator_type()); // constexpr since C++20 122 basic_string(nullptr_t) = delete; // C++2b 123 basic_string(size_type n, value_type c, const allocator_type& a = allocator_type()); // constexpr since C++20 124 template<class InputIterator> 125 basic_string(InputIterator begin, InputIterator end, 126 const allocator_type& a = allocator_type()); // constexpr since C++20 127 basic_string(initializer_list<value_type>, const Allocator& = Allocator()); // constexpr since C++20 128 basic_string(const basic_string&, const Allocator&); // constexpr since C++20 129 basic_string(basic_string&&, const Allocator&); // constexpr since C++20 130 131 ~basic_string(); // constexpr since C++20 132 133 operator basic_string_view<charT, traits>() const noexcept; // constexpr since C++20 134 135 basic_string& operator=(const basic_string& str); // constexpr since C++20 136 template <class T> 137 basic_string& operator=(const T& t); // C++17, constexpr since C++20 138 basic_string& operator=(basic_string&& str) 139 noexcept( 140 allocator_type::propagate_on_container_move_assignment::value || 141 allocator_type::is_always_equal::value ); // C++17, constexpr since C++20 142 basic_string& operator=(const value_type* s); // constexpr since C++20 143 basic_string& operator=(nullptr_t) = delete; // C++2b 144 basic_string& operator=(value_type c); // constexpr since C++20 145 basic_string& operator=(initializer_list<value_type>); // constexpr since C++20 146 147 iterator begin() noexcept; // constexpr since C++20 148 const_iterator begin() const noexcept; // constexpr since C++20 149 iterator end() noexcept; // constexpr since C++20 150 const_iterator end() const noexcept; // constexpr since C++20 151 152 reverse_iterator rbegin() noexcept; // constexpr since C++20 153 const_reverse_iterator rbegin() const noexcept; // constexpr since C++20 154 reverse_iterator rend() noexcept; // constexpr since C++20 155 const_reverse_iterator rend() const noexcept; // constexpr since C++20 156 157 const_iterator cbegin() const noexcept; // constexpr since C++20 158 const_iterator cend() const noexcept; // constexpr since C++20 159 const_reverse_iterator crbegin() const noexcept; // constexpr since C++20 160 const_reverse_iterator crend() const noexcept; // constexpr since C++20 161 162 size_type size() const noexcept; // constexpr since C++20 163 size_type length() const noexcept; // constexpr since C++20 164 size_type max_size() const noexcept; // constexpr since C++20 165 size_type capacity() const noexcept; // constexpr since C++20 166 167 void resize(size_type n, value_type c); // constexpr since C++20 168 void resize(size_type n); // constexpr since C++20 169 170 template<class Operation> 171 constexpr void resize_and_overwrite(size_type n, Operation op); // since C++23 172 173 void reserve(size_type res_arg); // constexpr since C++20 174 void reserve(); // deprecated in C++20 175 void shrink_to_fit(); // constexpr since C++20 176 void clear() noexcept; // constexpr since C++20 177 bool empty() const noexcept; // constexpr since C++20 178 179 const_reference operator[](size_type pos) const; // constexpr since C++20 180 reference operator[](size_type pos); // constexpr since C++20 181 182 const_reference at(size_type n) const; // constexpr since C++20 183 reference at(size_type n); // constexpr since C++20 184 185 basic_string& operator+=(const basic_string& str); // constexpr since C++20 186 template <class T> 187 basic_string& operator+=(const T& t); // C++17, constexpr since C++20 188 basic_string& operator+=(const value_type* s); // constexpr since C++20 189 basic_string& operator+=(value_type c); // constexpr since C++20 190 basic_string& operator+=(initializer_list<value_type>); // constexpr since C++20 191 192 basic_string& append(const basic_string& str); // constexpr since C++20 193 template <class T> 194 basic_string& append(const T& t); // C++17, constexpr since C++20 195 basic_string& append(const basic_string& str, size_type pos, size_type n=npos); // C++14, constexpr since C++20 196 template <class T> 197 basic_string& append(const T& t, size_type pos, size_type n=npos); // C++17, constexpr since C++20 198 basic_string& append(const value_type* s, size_type n); // constexpr since C++20 199 basic_string& append(const value_type* s); // constexpr since C++20 200 basic_string& append(size_type n, value_type c); // constexpr since C++20 201 template<class InputIterator> 202 basic_string& append(InputIterator first, InputIterator last); // constexpr since C++20 203 basic_string& append(initializer_list<value_type>); // constexpr since C++20 204 205 void push_back(value_type c); // constexpr since C++20 206 void pop_back(); // constexpr since C++20 207 reference front(); // constexpr since C++20 208 const_reference front() const; // constexpr since C++20 209 reference back(); // constexpr since C++20 210 const_reference back() const; // constexpr since C++20 211 212 basic_string& assign(const basic_string& str); // constexpr since C++20 213 template <class T> 214 basic_string& assign(const T& t); // C++17, constexpr since C++20 215 basic_string& assign(basic_string&& str); // constexpr since C++20 216 basic_string& assign(const basic_string& str, size_type pos, size_type n=npos); // C++14, constexpr since C++20 217 template <class T> 218 basic_string& assign(const T& t, size_type pos, size_type n=npos); // C++17, constexpr since C++20 219 basic_string& assign(const value_type* s, size_type n); // constexpr since C++20 220 basic_string& assign(const value_type* s); // constexpr since C++20 221 basic_string& assign(size_type n, value_type c); // constexpr since C++20 222 template<class InputIterator> 223 basic_string& assign(InputIterator first, InputIterator last); // constexpr since C++20 224 basic_string& assign(initializer_list<value_type>); // constexpr since C++20 225 226 basic_string& insert(size_type pos1, const basic_string& str); // constexpr since C++20 227 template <class T> 228 basic_string& insert(size_type pos1, const T& t); // constexpr since C++20 229 basic_string& insert(size_type pos1, const basic_string& str, 230 size_type pos2, size_type n); // constexpr since C++20 231 template <class T> 232 basic_string& insert(size_type pos1, const T& t, size_type pos2, size_type n); // C++17, constexpr since C++20 233 basic_string& insert(size_type pos, const value_type* s, size_type n=npos); // C++14, constexpr since C++20 234 basic_string& insert(size_type pos, const value_type* s); // constexpr since C++20 235 basic_string& insert(size_type pos, size_type n, value_type c); // constexpr since C++20 236 iterator insert(const_iterator p, value_type c); // constexpr since C++20 237 iterator insert(const_iterator p, size_type n, value_type c); // constexpr since C++20 238 template<class InputIterator> 239 iterator insert(const_iterator p, InputIterator first, InputIterator last); // constexpr since C++20 240 iterator insert(const_iterator p, initializer_list<value_type>); // constexpr since C++20 241 242 basic_string& erase(size_type pos = 0, size_type n = npos); // constexpr since C++20 243 iterator erase(const_iterator position); // constexpr since C++20 244 iterator erase(const_iterator first, const_iterator last); // constexpr since C++20 245 246 basic_string& replace(size_type pos1, size_type n1, const basic_string& str); // constexpr since C++20 247 template <class T> 248 basic_string& replace(size_type pos1, size_type n1, const T& t); // C++17, constexpr since C++20 249 basic_string& replace(size_type pos1, size_type n1, const basic_string& str, 250 size_type pos2, size_type n2=npos); // C++14, constexpr since C++20 251 template <class T> 252 basic_string& replace(size_type pos1, size_type n1, const T& t, 253 size_type pos2, size_type n); // C++17, constexpr since C++20 254 basic_string& replace(size_type pos, size_type n1, const value_type* s, size_type n2); // constexpr since C++20 255 basic_string& replace(size_type pos, size_type n1, const value_type* s); // constexpr since C++20 256 basic_string& replace(size_type pos, size_type n1, size_type n2, value_type c); // constexpr since C++20 257 basic_string& replace(const_iterator i1, const_iterator i2, const basic_string& str); // constexpr since C++20 258 template <class T> 259 basic_string& replace(const_iterator i1, const_iterator i2, const T& t); // C++17, constexpr since C++20 260 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s, size_type n); // constexpr since C++20 261 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s); // constexpr since C++20 262 basic_string& replace(const_iterator i1, const_iterator i2, size_type n, value_type c); // constexpr since C++20 263 template<class InputIterator> 264 basic_string& replace(const_iterator i1, const_iterator i2, InputIterator j1, InputIterator j2); // constexpr since C++20 265 basic_string& replace(const_iterator i1, const_iterator i2, initializer_list<value_type>); // constexpr since C++20 266 267 size_type copy(value_type* s, size_type n, size_type pos = 0) const; // constexpr since C++20 268 basic_string substr(size_type pos = 0, size_type n = npos) const; // constexpr in C++20, removed in C++23 269 basic_string substr(size_type pos = 0, size_type n = npos) const&; // since C++23 270 constexpr basic_string substr(size_type pos = 0, size_type n = npos) &&; // since C++23 271 void swap(basic_string& str) 272 noexcept(allocator_traits<allocator_type>::propagate_on_container_swap::value || 273 allocator_traits<allocator_type>::is_always_equal::value); // C++17, constexpr since C++20 274 275 const value_type* c_str() const noexcept; // constexpr since C++20 276 const value_type* data() const noexcept; // constexpr since C++20 277 value_type* data() noexcept; // C++17, constexpr since C++20 278 279 allocator_type get_allocator() const noexcept; // constexpr since C++20 280 281 size_type find(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 282 template <class T> 283 size_type find(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 284 size_type find(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 285 size_type find(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 286 size_type find(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 287 288 size_type rfind(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 289 template <class T> 290 size_type rfind(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 291 size_type rfind(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 292 size_type rfind(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 293 size_type rfind(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 294 295 size_type find_first_of(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 296 template <class T> 297 size_type find_first_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 298 size_type find_first_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 299 size_type find_first_of(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 300 size_type find_first_of(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 301 302 size_type find_last_of(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 303 template <class T> 304 size_type find_last_of(const T& t, size_type pos = npos) const noexcept noexcept; // C++17, noexcept as an extension, constexpr since C++20 305 size_type find_last_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 306 size_type find_last_of(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 307 size_type find_last_of(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 308 309 size_type find_first_not_of(const basic_string& str, size_type pos = 0) const noexcept; // constexpr since C++20 310 template <class T> 311 size_type find_first_not_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 312 size_type find_first_not_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 313 size_type find_first_not_of(const value_type* s, size_type pos = 0) const noexcept; // constexpr since C++20 314 size_type find_first_not_of(value_type c, size_type pos = 0) const noexcept; // constexpr since C++20 315 316 size_type find_last_not_of(const basic_string& str, size_type pos = npos) const noexcept; // constexpr since C++20 317 template <class T> 318 size_type find_last_not_of(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 319 size_type find_last_not_of(const value_type* s, size_type pos, size_type n) const noexcept; // constexpr since C++20 320 size_type find_last_not_of(const value_type* s, size_type pos = npos) const noexcept; // constexpr since C++20 321 size_type find_last_not_of(value_type c, size_type pos = npos) const noexcept; // constexpr since C++20 322 323 int compare(const basic_string& str) const noexcept; // constexpr since C++20 324 template <class T> 325 int compare(const T& t) const noexcept; // C++17, noexcept as an extension, constexpr since C++20 326 int compare(size_type pos1, size_type n1, const basic_string& str) const; // constexpr since C++20 327 template <class T> 328 int compare(size_type pos1, size_type n1, const T& t) const; // C++17, constexpr since C++20 329 int compare(size_type pos1, size_type n1, const basic_string& str, 330 size_type pos2, size_type n2=npos) const; // C++14, constexpr since C++20 331 template <class T> 332 int compare(size_type pos1, size_type n1, const T& t, 333 size_type pos2, size_type n2=npos) const; // C++17, constexpr since C++20 334 int compare(const value_type* s) const noexcept; // constexpr since C++20 335 int compare(size_type pos1, size_type n1, const value_type* s) const; // constexpr since C++20 336 int compare(size_type pos1, size_type n1, const value_type* s, size_type n2) const; // constexpr since C++20 337 338 constexpr bool starts_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 339 constexpr bool starts_with(charT c) const noexcept; // C++20 340 constexpr bool starts_with(const charT* s) const; // C++20 341 constexpr bool ends_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 342 constexpr bool ends_with(charT c) const noexcept; // C++20 343 constexpr bool ends_with(const charT* s) const; // C++20 344 345 constexpr bool contains(basic_string_view<charT, traits> sv) const noexcept; // C++2b 346 constexpr bool contains(charT c) const noexcept; // C++2b 347 constexpr bool contains(const charT* s) const; // C++2b 348}; 349 350template<class InputIterator, 351 class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 352basic_string(InputIterator, InputIterator, Allocator = Allocator()) 353 -> basic_string<typename iterator_traits<InputIterator>::value_type, 354 char_traits<typename iterator_traits<InputIterator>::value_type>, 355 Allocator>; // C++17 356 357template<class charT, class traits, class Allocator> 358basic_string<charT, traits, Allocator> 359operator+(const basic_string<charT, traits, Allocator>& lhs, 360 const basic_string<charT, traits, Allocator>& rhs); // constexpr since C++20 361 362template<class charT, class traits, class Allocator> 363basic_string<charT, traits, Allocator> 364operator+(const charT* lhs , const basic_string<charT,traits,Allocator>&rhs); // constexpr since C++20 365 366template<class charT, class traits, class Allocator> 367basic_string<charT, traits, Allocator> 368operator+(charT lhs, const basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20 369 370template<class charT, class traits, class Allocator> 371basic_string<charT, traits, Allocator> 372operator+(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs); // constexpr since C++20 373 374template<class charT, class traits, class Allocator> 375basic_string<charT, traits, Allocator> 376operator+(const basic_string<charT, traits, Allocator>& lhs, charT rhs); // constexpr since C++20 377 378template<class charT, class traits, class Allocator> 379bool operator==(const basic_string<charT, traits, Allocator>& lhs, 380 const basic_string<charT, traits, Allocator>& rhs) noexcept; // constexpr since C++20 381 382template<class charT, class traits, class Allocator> 383bool operator==(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 384 385template<class charT, class traits, class Allocator> 386bool operator==(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs) noexcept; // constexpr since C++20 387 388template<class charT, class traits, class Allocator> 389bool operator!=(const basic_string<charT,traits,Allocator>& lhs, 390 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 391 392template<class charT, class traits, class Allocator> 393bool operator!=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 394 395template<class charT, class traits, class Allocator> 396bool operator!=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 397 398template<class charT, class traits, class Allocator> 399bool operator< (const basic_string<charT, traits, Allocator>& lhs, 400 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 401 402template<class charT, class traits, class Allocator> 403bool operator< (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 404 405template<class charT, class traits, class Allocator> 406bool operator< (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 407 408template<class charT, class traits, class Allocator> 409bool operator> (const basic_string<charT, traits, Allocator>& lhs, 410 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 411 412template<class charT, class traits, class Allocator> 413bool operator> (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 414 415template<class charT, class traits, class Allocator> 416bool operator> (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 417 418template<class charT, class traits, class Allocator> 419bool operator<=(const basic_string<charT, traits, Allocator>& lhs, 420 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 421 422template<class charT, class traits, class Allocator> 423bool operator<=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 424 425template<class charT, class traits, class Allocator> 426bool operator<=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 427 428template<class charT, class traits, class Allocator> 429bool operator>=(const basic_string<charT, traits, Allocator>& lhs, 430 const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 431 432template<class charT, class traits, class Allocator> 433bool operator>=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; // removed in C++20 434 435template<class charT, class traits, class Allocator> 436bool operator>=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; // removed in C++20 437 438template<class charT, class traits, class Allocator> // since C++20 439constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, 440 const basic_string<charT, traits, Allocator>& rhs) noexcept; 441 442template<class charT, class traits, class Allocator> // since C++20 443constexpr see below operator<=>(const basic_string<charT, traits, Allocator>& lhs, 444 const charT* rhs) noexcept; 445 446template<class charT, class traits, class Allocator> 447void swap(basic_string<charT, traits, Allocator>& lhs, 448 basic_string<charT, traits, Allocator>& rhs) 449 noexcept(noexcept(lhs.swap(rhs))); // constexpr since C++20 450 451template<class charT, class traits, class Allocator> 452basic_istream<charT, traits>& 453operator>>(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 454 455template<class charT, class traits, class Allocator> 456basic_ostream<charT, traits>& 457operator<<(basic_ostream<charT, traits>& os, const basic_string<charT, traits, Allocator>& str); 458 459template<class charT, class traits, class Allocator> 460basic_istream<charT, traits>& 461getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str, 462 charT delim); 463 464template<class charT, class traits, class Allocator> 465basic_istream<charT, traits>& 466getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 467 468template<class charT, class traits, class Allocator, class U> 469typename basic_string<charT, traits, Allocator>::size_type 470erase(basic_string<charT, traits, Allocator>& c, const U& value); // C++20 471template<class charT, class traits, class Allocator, class Predicate> 472typename basic_string<charT, traits, Allocator>::size_type 473erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred); // C++20 474 475typedef basic_string<char> string; 476typedef basic_string<wchar_t> wstring; 477typedef basic_string<char8_t> u8string; // C++20 478typedef basic_string<char16_t> u16string; 479typedef basic_string<char32_t> u32string; 480 481int stoi (const string& str, size_t* idx = nullptr, int base = 10); 482long stol (const string& str, size_t* idx = nullptr, int base = 10); 483unsigned long stoul (const string& str, size_t* idx = nullptr, int base = 10); 484long long stoll (const string& str, size_t* idx = nullptr, int base = 10); 485unsigned long long stoull(const string& str, size_t* idx = nullptr, int base = 10); 486 487float stof (const string& str, size_t* idx = nullptr); 488double stod (const string& str, size_t* idx = nullptr); 489long double stold(const string& str, size_t* idx = nullptr); 490 491string to_string(int val); 492string to_string(unsigned val); 493string to_string(long val); 494string to_string(unsigned long val); 495string to_string(long long val); 496string to_string(unsigned long long val); 497string to_string(float val); 498string to_string(double val); 499string to_string(long double val); 500 501int stoi (const wstring& str, size_t* idx = nullptr, int base = 10); 502long stol (const wstring& str, size_t* idx = nullptr, int base = 10); 503unsigned long stoul (const wstring& str, size_t* idx = nullptr, int base = 10); 504long long stoll (const wstring& str, size_t* idx = nullptr, int base = 10); 505unsigned long long stoull(const wstring& str, size_t* idx = nullptr, int base = 10); 506 507float stof (const wstring& str, size_t* idx = nullptr); 508double stod (const wstring& str, size_t* idx = nullptr); 509long double stold(const wstring& str, size_t* idx = nullptr); 510 511wstring to_wstring(int val); 512wstring to_wstring(unsigned val); 513wstring to_wstring(long val); 514wstring to_wstring(unsigned long val); 515wstring to_wstring(long long val); 516wstring to_wstring(unsigned long long val); 517wstring to_wstring(float val); 518wstring to_wstring(double val); 519wstring to_wstring(long double val); 520 521template <> struct hash<string>; 522template <> struct hash<u8string>; // C++20 523template <> struct hash<u16string>; 524template <> struct hash<u32string>; 525template <> struct hash<wstring>; 526 527basic_string<char> operator "" s( const char *str, size_t len ); // C++14, constexpr since C++20 528basic_string<wchar_t> operator "" s( const wchar_t *str, size_t len ); // C++14, constexpr since C++20 529constexpr basic_string<char8_t> operator "" s( const char8_t *str, size_t len ); // C++20 530basic_string<char16_t> operator "" s( const char16_t *str, size_t len ); // C++14, constexpr since C++20 531basic_string<char32_t> operator "" s( const char32_t *str, size_t len ); // C++14, constexpr since C++20 532 533} // std 534 535*/ 536 537#include <__algorithm/max.h> 538#include <__algorithm/min.h> 539#include <__algorithm/remove.h> 540#include <__algorithm/remove_if.h> 541#include <__assert> // all public C++ headers provide the assertion handler 542#include <__config> 543#include <__debug> 544#include <__format/enable_insertable.h> 545#include <__functional/hash.h> 546#include <__functional/unary_function.h> 547#include <__fwd/string.h> 548#include <__ios/fpos.h> 549#include <__iterator/distance.h> 550#include <__iterator/iterator_traits.h> 551#include <__iterator/reverse_iterator.h> 552#include <__iterator/wrap_iter.h> 553#include <__memory/addressof.h> 554#include <__memory/allocate_at_least.h> 555#include <__memory/allocator.h> 556#include <__memory/allocator_traits.h> 557#include <__memory/compressed_pair.h> 558#include <__memory/construct_at.h> 559#include <__memory/pointer_traits.h> 560#include <__memory/swap_allocator.h> 561#include <__memory_resource/polymorphic_allocator.h> 562#include <__string/char_traits.h> 563#include <__string/extern_template_lists.h> 564#include <__type_traits/is_allocator.h> 565#include <__type_traits/is_array.h> 566#include <__type_traits/is_convertible.h> 567#include <__type_traits/is_nothrow_default_constructible.h> 568#include <__type_traits/is_nothrow_move_assignable.h> 569#include <__type_traits/is_same.h> 570#include <__type_traits/is_standard_layout.h> 571#include <__type_traits/is_trivial.h> 572#include <__type_traits/noexcept_move_assign_container.h> 573#include <__type_traits/remove_cvref.h> 574#include <__utility/auto_cast.h> 575#include <__utility/move.h> 576#include <__utility/swap.h> 577#include <__utility/unreachable.h> 578#include <climits> 579#include <cstdint> 580#include <cstdio> // EOF 581#include <cstring> 582#include <limits> 583#include <stdexcept> 584#include <string_view> 585#include <version> 586 587#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 588# include <cwchar> 589#endif 590 591// standard-mandated includes 592 593// [iterator.range] 594#include <__iterator/access.h> 595#include <__iterator/data.h> 596#include <__iterator/empty.h> 597#include <__iterator/reverse_access.h> 598#include <__iterator/size.h> 599 600// [string.syn] 601#include <compare> 602#include <initializer_list> 603 604#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 605# pragma GCC system_header 606#endif 607 608_LIBCPP_PUSH_MACROS 609#include <__undef_macros> 610 611 612_LIBCPP_BEGIN_NAMESPACE_STD 613 614// basic_string 615 616template<class _CharT, class _Traits, class _Allocator> 617basic_string<_CharT, _Traits, _Allocator> 618_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 619operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, 620 const basic_string<_CharT, _Traits, _Allocator>& __y); 621 622template<class _CharT, class _Traits, class _Allocator> 623_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 624basic_string<_CharT, _Traits, _Allocator> 625operator+(const _CharT* __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 626 627template<class _CharT, class _Traits, class _Allocator> 628_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 629basic_string<_CharT, _Traits, _Allocator> 630operator+(_CharT __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 631 632template<class _CharT, class _Traits, class _Allocator> 633inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 634basic_string<_CharT, _Traits, _Allocator> 635operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); 636 637template<class _CharT, class _Traits, class _Allocator> 638_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 639basic_string<_CharT, _Traits, _Allocator> 640operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); 641 642extern template _LIBCPP_FUNC_VIS string operator+<char, char_traits<char>, allocator<char> >(char const*, string const&); 643 644template <class _Iter> 645struct __string_is_trivial_iterator : public false_type {}; 646 647template <class _Tp> 648struct __string_is_trivial_iterator<_Tp*> 649 : public is_arithmetic<_Tp> {}; 650 651template <class _Iter> 652struct __string_is_trivial_iterator<__wrap_iter<_Iter> > 653 : public __string_is_trivial_iterator<_Iter> {}; 654 655template <class _CharT, class _Traits, class _Tp> 656struct __can_be_converted_to_string_view : public _BoolConstant< 657 is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && 658 !is_convertible<const _Tp&, const _CharT*>::value 659 > {}; 660 661struct __uninitialized_size_tag {}; 662 663template<class _CharT, class _Traits, class _Allocator> 664class basic_string 665{ 666public: 667 typedef basic_string __self; 668 typedef basic_string_view<_CharT, _Traits> __self_view; 669 typedef _Traits traits_type; 670 typedef _CharT value_type; 671 typedef _Allocator allocator_type; 672 typedef allocator_traits<allocator_type> __alloc_traits; 673 typedef typename __alloc_traits::size_type size_type; 674 typedef typename __alloc_traits::difference_type difference_type; 675 typedef value_type& reference; 676 typedef const value_type& const_reference; 677 typedef typename __alloc_traits::pointer pointer; 678 typedef typename __alloc_traits::const_pointer const_pointer; 679 680 static_assert((!is_array<value_type>::value), "Character type of basic_string must not be an array"); 681 static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string must be standard-layout"); 682 static_assert(( is_trivial<value_type>::value), "Character type of basic_string must be trivial"); 683 static_assert(( is_same<_CharT, typename traits_type::char_type>::value), 684 "traits_type::char_type must be the same type as CharT"); 685 static_assert(( is_same<typename allocator_type::value_type, value_type>::value), 686 "Allocator::value_type must be same type as value_type"); 687 688 static_assert(is_same<allocator_type, __rebind_alloc<__alloc_traits, value_type> >::value, 689 "[allocator.requirements] states that rebinding an allocator to the same type should result in the " 690 "original allocator"); 691 692 // TODO: Implement iterator bounds checking without requiring the global database. 693 typedef __wrap_iter<pointer> iterator; 694 typedef __wrap_iter<const_pointer> const_iterator; 695 typedef std::reverse_iterator<iterator> reverse_iterator; 696 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 697 698private: 699 static_assert(CHAR_BIT == 8, "This implementation assumes that one byte contains 8 bits"); 700 701#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 702 703 struct __long 704 { 705 pointer __data_; 706 size_type __size_; 707 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 708 size_type __is_long_ : 1; 709 }; 710 711 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 712 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 713 714 struct __short 715 { 716 value_type __data_[__min_cap]; 717 unsigned char __padding_[sizeof(value_type) - 1]; 718 unsigned char __size_ : 7; 719 unsigned char __is_long_ : 1; 720 }; 721 722// The __endian_factor is required because the field we use to store the size 723// has one fewer bit than it would if it were not a bitfield. 724// 725// If the LSB is used to store the short-flag in the short string representation, 726// we have to multiply the size by two when it is stored and divide it by two when 727// it is loaded to make sure that we always store an even number. In the long string 728// representation, we can ignore this because we can assume that we always allocate 729// an even amount of value_types. 730// 731// If the MSB is used for the short-flag, the max_size() is numeric_limits<size_type>::max() / 2. 732// This does not impact the short string representation, since we never need the MSB 733// for representing the size of a short string anyway. 734 735#ifdef _LIBCPP_BIG_ENDIAN 736 static const size_type __endian_factor = 2; 737#else 738 static const size_type __endian_factor = 1; 739#endif 740 741#else // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 742 743#ifdef _LIBCPP_BIG_ENDIAN 744 static const size_type __endian_factor = 1; 745#else 746 static const size_type __endian_factor = 2; 747#endif 748 749 // Attribute 'packed' is used to keep the layout compatible with the 750 // previous definition that did not use bit fields. This is because on 751 // some platforms bit fields have a default size rather than the actual 752 // size used, e.g., it is 4 bytes on AIX. See D128285 for details. 753 struct __long 754 { 755 struct _LIBCPP_PACKED { 756 size_type __is_long_ : 1; 757 size_type __cap_ : sizeof(size_type) * CHAR_BIT - 1; 758 }; 759 size_type __size_; 760 pointer __data_; 761 }; 762 763 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 764 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 765 766 struct __short 767 { 768 struct _LIBCPP_PACKED { 769 unsigned char __is_long_ : 1; 770 unsigned char __size_ : 7; 771 }; 772 char __padding_[sizeof(value_type) - 1]; 773 value_type __data_[__min_cap]; 774 }; 775 776#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 777 778 static_assert(sizeof(__short) == (sizeof(value_type) * (__min_cap + 1)), "__short has an unexpected size."); 779 780 union __ulx{__long __lx; __short __lxx;}; 781 782 enum {__n_words = sizeof(__ulx) / sizeof(size_type)}; 783 784 struct __raw 785 { 786 size_type __words[__n_words]; 787 }; 788 789 struct __rep 790 { 791 union 792 { 793 __long __l; 794 __short __s; 795 __raw __r; 796 }; 797 }; 798 799 __compressed_pair<__rep, allocator_type> __r_; 800 801 // Construct a string with the given allocator and enough storage to hold `__size` characters, but 802 // don't initialize the characters. The contents of the string, including the null terminator, must be 803 // initialized separately. 804 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 805 explicit basic_string(__uninitialized_size_tag, size_type __size, const allocator_type& __a) 806 : __r_(__default_init_tag(), __a) { 807 if (__size > max_size()) 808 __throw_length_error(); 809 if (__fits_in_sso(__size)) { 810 __r_.first() = __rep(); 811 __set_short_size(__size); 812 } else { 813 auto __capacity = __recommend(__size) + 1; 814 auto __allocation = __alloc_traits::allocate(__alloc(), __capacity); 815 __begin_lifetime(__allocation, __capacity); 816 __set_long_cap(__capacity); 817 __set_long_pointer(__allocation); 818 __set_long_size(__size); 819 } 820 std::__debug_db_insert_c(this); 821 } 822 823 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator __make_iterator(pointer __p) { 824 return iterator(this, __p); 825 } 826 827 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_iterator __make_const_iterator(const_pointer __p) const { 828 return const_iterator(this, __p); 829 } 830 831public: 832 _LIBCPP_TEMPLATE_DATA_VIS static const size_type npos = -1; 833 834 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string() 835 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value) 836 : __r_(__default_init_tag(), __default_init_tag()) { 837 std::__debug_db_insert_c(this); 838 __default_init(); 839 } 840 841 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const allocator_type& __a) 842#if _LIBCPP_STD_VER <= 14 843 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value) 844#else 845 _NOEXCEPT 846#endif 847 : __r_(__default_init_tag(), __a) { 848 std::__debug_db_insert_c(this); 849 __default_init(); 850 } 851 852 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const basic_string& __str) 853 : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) { 854 if (!__str.__is_long()) 855 __r_.first() = __str.__r_.first(); 856 else 857 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 858 std::__debug_db_insert_c(this); 859 } 860 861 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const basic_string& __str, const allocator_type& __a) 862 : __r_(__default_init_tag(), __a) { 863 if (!__str.__is_long()) 864 __r_.first() = __str.__r_.first(); 865 else 866 __init_copy_ctor_external(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 867 std::__debug_db_insert_c(this); 868 } 869 870#ifndef _LIBCPP_CXX03_LANG 871 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str) 872# if _LIBCPP_STD_VER <= 14 873 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value) 874# else 875 _NOEXCEPT 876# endif 877 : __r_(std::move(__str.__r_)) { 878 __str.__default_init(); 879 std::__debug_db_insert_c(this); 880 if (__is_long()) 881 std::__debug_db_swap(this, &__str); 882 } 883 884 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(basic_string&& __str, const allocator_type& __a) 885 : __r_(__default_init_tag(), __a) { 886 if (__str.__is_long() && __a != __str.__alloc()) // copy, not move 887 __init(std::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 888 else { 889 if (__libcpp_is_constant_evaluated()) 890 __r_.first() = __rep(); 891 __r_.first() = __str.__r_.first(); 892 __str.__default_init(); 893 } 894 std::__debug_db_insert_c(this); 895 if (__is_long()) 896 std::__debug_db_swap(this, &__str); 897 } 898#endif // _LIBCPP_CXX03_LANG 899 900 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 901 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s) 902 : __r_(__default_init_tag(), __default_init_tag()) { 903 _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*) detected nullptr"); 904 __init(__s, traits_type::length(__s)); 905 std::__debug_db_insert_c(this); 906 } 907 908 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 909 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, const _Allocator& __a) 910 : __r_(__default_init_tag(), __a) { 911 _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); 912 __init(__s, traits_type::length(__s)); 913 std::__debug_db_insert_c(this); 914 } 915 916#if _LIBCPP_STD_VER >= 23 917 basic_string(nullptr_t) = delete; 918#endif 919 920 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(const _CharT* __s, size_type __n) 921 : __r_(__default_init_tag(), __default_init_tag()) { 922 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); 923 __init(__s, __n); 924 std::__debug_db_insert_c(this); 925 } 926 927 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 928 basic_string(const _CharT* __s, size_type __n, const _Allocator& __a) 929 : __r_(__default_init_tag(), __a) { 930 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n, allocator) detected nullptr"); 931 __init(__s, __n); 932 std::__debug_db_insert_c(this); 933 } 934 935 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c) 936 : __r_(__default_init_tag(), __default_init_tag()) { 937 __init(__n, __c); 938 std::__debug_db_insert_c(this); 939 } 940 941#if _LIBCPP_STD_VER >= 23 942 _LIBCPP_HIDE_FROM_ABI constexpr 943 basic_string(basic_string&& __str, size_type __pos, const _Allocator& __alloc = _Allocator()) 944 : basic_string(std::move(__str), __pos, npos, __alloc) {} 945 946 _LIBCPP_HIDE_FROM_ABI constexpr 947 basic_string(basic_string&& __str, size_type __pos, size_type __n, const _Allocator& __alloc = _Allocator()) 948 : __r_(__default_init_tag(), __alloc) { 949 if (__pos > __str.size()) 950 __throw_out_of_range(); 951 952 auto __len = std::min<size_type>(__n, __str.size() - __pos); 953 if (__alloc_traits::is_always_equal::value || __alloc == __str.__alloc()) { 954 __r_.first() = __str.__r_.first(); 955 __str.__default_init(); 956 957 _Traits::move(data(), data() + __pos, __len); 958 __set_size(__len); 959 _Traits::assign(data()[__len], value_type()); 960 } else { 961 // Perform a copy because the allocators are not compatible. 962 __init(__str.data() + __pos, __len); 963 } 964 965 std::__debug_db_insert_c(this); 966 if (__is_long()) 967 std::__debug_db_swap(this, &__str); 968 } 969#endif 970 971 template <__enable_if_t<__is_allocator<_Allocator>::value, int> = 0> 972 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(size_type __n, _CharT __c, const _Allocator& __a) 973 : __r_(__default_init_tag(), __a) { 974 __init(__n, __c); 975 std::__debug_db_insert_c(this); 976 } 977 978 _LIBCPP_CONSTEXPR_SINCE_CXX20 979 basic_string(const basic_string& __str, size_type __pos, size_type __n, const _Allocator& __a = _Allocator()) 980 : __r_(__default_init_tag(), __a) { 981 size_type __str_sz = __str.size(); 982 if (__pos > __str_sz) 983 __throw_out_of_range(); 984 __init(__str.data() + __pos, std::min(__n, __str_sz - __pos)); 985 std::__debug_db_insert_c(this); 986 } 987 988 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 989 basic_string(const basic_string& __str, size_type __pos, const _Allocator& __a = _Allocator()) 990 : __r_(__default_init_tag(), __a) { 991 size_type __str_sz = __str.size(); 992 if (__pos > __str_sz) 993 __throw_out_of_range(); 994 __init(__str.data() + __pos, __str_sz - __pos); 995 std::__debug_db_insert_c(this); 996 } 997 998 template <class _Tp, 999 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1000 !__is_same_uncvref<_Tp, basic_string>::value, 1001 int> = 0> 1002 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1003 basic_string(const _Tp& __t, size_type __pos, size_type __n, const allocator_type& __a = allocator_type()) 1004 : __r_(__default_init_tag(), __a) { 1005 __self_view __sv0 = __t; 1006 __self_view __sv = __sv0.substr(__pos, __n); 1007 __init(__sv.data(), __sv.size()); 1008 std::__debug_db_insert_c(this); 1009 } 1010 1011 template <class _Tp, 1012 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1013 !__is_same_uncvref<_Tp, basic_string>::value, 1014 int> = 0> 1015 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string(const _Tp& __t) 1016 : __r_(__default_init_tag(), __default_init_tag()) { 1017 __self_view __sv = __t; 1018 __init(__sv.data(), __sv.size()); 1019 std::__debug_db_insert_c(this); 1020 } 1021 1022 template <class _Tp, 1023 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1024 !__is_same_uncvref<_Tp, basic_string>::value, 1025 int> = 0> 1026 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit basic_string( 1027 const _Tp& __t, const allocator_type& __a) 1028 : __r_(__default_init_tag(), __a) { 1029 __self_view __sv = __t; 1030 __init(__sv.data(), __sv.size()); 1031 std::__debug_db_insert_c(this); 1032 } 1033 1034 template <class _InputIterator, __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value, int> = 0> 1035 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(_InputIterator __first, _InputIterator __last) 1036 : __r_(__default_init_tag(), __default_init_tag()) { 1037 __init(__first, __last); 1038 std::__debug_db_insert_c(this); 1039 } 1040 1041 template <class _InputIterator, __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value, int> = 0> 1042 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1043 basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a) 1044 : __r_(__default_init_tag(), __a) { 1045 __init(__first, __last); 1046 std::__debug_db_insert_c(this); 1047 } 1048 1049#ifndef _LIBCPP_CXX03_LANG 1050 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il) 1051 : __r_(__default_init_tag(), __default_init_tag()) { 1052 __init(__il.begin(), __il.end()); 1053 std::__debug_db_insert_c(this); 1054 } 1055 1056 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string(initializer_list<_CharT> __il, const _Allocator& __a) 1057 : __r_(__default_init_tag(), __a) { 1058 __init(__il.begin(), __il.end()); 1059 std::__debug_db_insert_c(this); 1060 } 1061#endif // _LIBCPP_CXX03_LANG 1062 1063 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 ~basic_string() { 1064 std::__debug_db_erase_c(this); 1065 if (__is_long()) 1066 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 1067 } 1068 1069 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1070 operator __self_view() const _NOEXCEPT { return __self_view(data(), size()); } 1071 1072 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const basic_string& __str); 1073 1074 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1075 !__is_same_uncvref<_Tp, basic_string>::value, int> = 0> 1076 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(const _Tp& __t) { 1077 __self_view __sv = __t; 1078 return assign(__sv); 1079 } 1080 1081#ifndef _LIBCPP_CXX03_LANG 1082 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(basic_string&& __str) 1083 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) { 1084 __move_assign(__str, integral_constant<bool, __alloc_traits::propagate_on_container_move_assignment::value>()); 1085 return *this; 1086 } 1087 1088 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1089 basic_string& operator=(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 1090#endif 1091 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1092 basic_string& operator=(const value_type* __s) {return assign(__s);} 1093#if _LIBCPP_STD_VER >= 23 1094 basic_string& operator=(nullptr_t) = delete; 1095#endif 1096 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator=(value_type __c); 1097 1098 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1099 iterator begin() _NOEXCEPT 1100 {return __make_iterator(__get_pointer());} 1101 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1102 const_iterator begin() const _NOEXCEPT 1103 {return __make_const_iterator(__get_pointer());} 1104 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1105 iterator end() _NOEXCEPT 1106 {return __make_iterator(__get_pointer() + size());} 1107 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1108 const_iterator end() const _NOEXCEPT 1109 {return __make_const_iterator(__get_pointer() + size());} 1110 1111 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1112 reverse_iterator rbegin() _NOEXCEPT 1113 {return reverse_iterator(end());} 1114 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1115 const_reverse_iterator rbegin() const _NOEXCEPT 1116 {return const_reverse_iterator(end());} 1117 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1118 reverse_iterator rend() _NOEXCEPT 1119 {return reverse_iterator(begin());} 1120 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1121 const_reverse_iterator rend() const _NOEXCEPT 1122 {return const_reverse_iterator(begin());} 1123 1124 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1125 const_iterator cbegin() const _NOEXCEPT 1126 {return begin();} 1127 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1128 const_iterator cend() const _NOEXCEPT 1129 {return end();} 1130 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1131 const_reverse_iterator crbegin() const _NOEXCEPT 1132 {return rbegin();} 1133 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1134 const_reverse_iterator crend() const _NOEXCEPT 1135 {return rend();} 1136 1137 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type size() const _NOEXCEPT 1138 {return __is_long() ? __get_long_size() : __get_short_size();} 1139 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type length() const _NOEXCEPT {return size();} 1140 1141 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type max_size() const _NOEXCEPT { 1142 size_type __m = __alloc_traits::max_size(__alloc()); 1143 if (__m <= std::numeric_limits<size_type>::max() / 2) { 1144 return __m - __alignment; 1145 } else { 1146 bool __uses_lsb = __endian_factor == 2; 1147 return __uses_lsb ? __m - __alignment : (__m / 2) - __alignment; 1148 } 1149 } 1150 1151 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type capacity() const _NOEXCEPT { 1152 return (__is_long() ? __get_long_cap() : static_cast<size_type>(__min_cap)) - 1; 1153 } 1154 1155 _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n, value_type __c); 1156 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void resize(size_type __n) { resize(__n, value_type()); } 1157 1158 _LIBCPP_CONSTEXPR_SINCE_CXX20 void reserve(size_type __requested_capacity); 1159 1160#if _LIBCPP_STD_VER >= 23 1161 template <class _Op> 1162 _LIBCPP_HIDE_FROM_ABI constexpr 1163 void resize_and_overwrite(size_type __n, _Op __op) { 1164 __resize_default_init(__n); 1165 __erase_to_end(std::move(__op)(data(), _LIBCPP_AUTO_CAST(__n))); 1166 } 1167#endif 1168 1169 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __resize_default_init(size_type __n); 1170 1171 _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_HIDE_FROM_ABI void reserve() _NOEXCEPT { shrink_to_fit(); } 1172 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void shrink_to_fit() _NOEXCEPT; 1173 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void clear() _NOEXCEPT; 1174 1175 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1176 bool empty() const _NOEXCEPT {return size() == 0;} 1177 1178 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference operator[](size_type __pos) const _NOEXCEPT { 1179 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 1180 return *(data() + __pos); 1181 } 1182 1183 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference operator[](size_type __pos) _NOEXCEPT { 1184 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 1185 return *(__get_pointer() + __pos); 1186 } 1187 1188 _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference at(size_type __n) const; 1189 _LIBCPP_CONSTEXPR_SINCE_CXX20 reference at(size_type __n); 1190 1191 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const basic_string& __str) { 1192 return append(__str); 1193 } 1194 1195 template <class _Tp, 1196 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1197 !__is_same_uncvref<_Tp, basic_string >::value, 1198 int> = 0> 1199 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1200 operator+=(const _Tp& __t) { 1201 __self_view __sv = __t; return append(__sv); 1202 } 1203 1204 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(const value_type* __s) { 1205 return append(__s); 1206 } 1207 1208 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& operator+=(value_type __c) { 1209 push_back(__c); 1210 return *this; 1211 } 1212 1213#ifndef _LIBCPP_CXX03_LANG 1214 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1215 basic_string& operator+=(initializer_list<value_type> __il) { return append(__il); } 1216#endif // _LIBCPP_CXX03_LANG 1217 1218 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str) { 1219 return append(__str.data(), __str.size()); 1220 } 1221 1222 template <class _Tp, 1223 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1224 !__is_same_uncvref<_Tp, basic_string>::value, 1225 int> = 0> 1226 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1227 append(const _Tp& __t) { 1228 __self_view __sv = __t; 1229 return append(__sv.data(), __sv.size()); 1230 } 1231 1232 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const basic_string& __str, size_type __pos, size_type __n=npos); 1233 1234 template <class _Tp, 1235 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1236 !__is_same_uncvref<_Tp, basic_string>::value, 1237 int> = 0> 1238 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 1239 1240 basic_string& 1241 append(const _Tp& __t, size_type __pos, size_type __n = npos); 1242 1243 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s, size_type __n); 1244 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(const value_type* __s); 1245 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& append(size_type __n, value_type __c); 1246 1247 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1248 void __append_default_init(size_type __n); 1249 1250 template <class _InputIterator, __enable_if_t<__is_exactly_cpp17_input_iterator<_InputIterator>::value, int> = 0> 1251 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1252 append(_InputIterator __first, _InputIterator __last) { 1253 const basic_string __temp(__first, __last, __alloc()); 1254 append(__temp.data(), __temp.size()); 1255 return *this; 1256 } 1257 1258 template <class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> = 0> 1259 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1260 append(_ForwardIterator __first, _ForwardIterator __last); 1261 1262#ifndef _LIBCPP_CXX03_LANG 1263 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1264 basic_string& append(initializer_list<value_type> __il) {return append(__il.begin(), __il.size());} 1265#endif // _LIBCPP_CXX03_LANG 1266 1267 _LIBCPP_CONSTEXPR_SINCE_CXX20 void push_back(value_type __c); 1268 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void pop_back(); 1269 1270 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference front() _NOEXCEPT { 1271 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 1272 return *__get_pointer(); 1273 } 1274 1275 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference front() const _NOEXCEPT { 1276 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 1277 return *data(); 1278 } 1279 1280 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 reference back() _NOEXCEPT { 1281 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 1282 return *(__get_pointer() + size() - 1); 1283 } 1284 1285 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference back() const _NOEXCEPT { 1286 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 1287 return *(data() + size() - 1); 1288 } 1289 1290 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1291 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1292 assign(const _Tp& __t) { 1293 __self_view __sv = __t; 1294 return assign(__sv.data(), __sv.size()); 1295 } 1296 1297 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1298 basic_string& assign(const basic_string& __str) { return *this = __str; } 1299#ifndef _LIBCPP_CXX03_LANG 1300 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1301 basic_string& assign(basic_string&& __str) 1302 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) 1303 {*this = std::move(__str); return *this;} 1304#endif 1305 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n=npos); 1306 1307 template <class _Tp, 1308 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1309 !__is_same_uncvref<_Tp, basic_string>::value, 1310 int> = 0> 1311 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1312 assign(const _Tp& __t, size_type __pos, size_type __n = npos); 1313 1314 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s, size_type __n); 1315 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(const value_type* __s); 1316 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& assign(size_type __n, value_type __c); 1317 template <class _InputIterator, __enable_if_t<__is_exactly_cpp17_input_iterator<_InputIterator>::value, int> = 0> 1318 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1319 assign(_InputIterator __first, _InputIterator __last); 1320 1321 template <class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> = 0> 1322 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1323 assign(_ForwardIterator __first, _ForwardIterator __last); 1324 1325#ifndef _LIBCPP_CXX03_LANG 1326 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1327 basic_string& assign(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 1328#endif // _LIBCPP_CXX03_LANG 1329 1330 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1331 insert(size_type __pos1, const basic_string& __str) { 1332 return insert(__pos1, __str.data(), __str.size()); 1333 } 1334 1335 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1336 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1337 insert(size_type __pos1, const _Tp& __t) { 1338 __self_view __sv = __t; 1339 return insert(__pos1, __sv.data(), __sv.size()); 1340 } 1341 1342 template <class _Tp, 1343 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1344 !__is_same_uncvref<_Tp, basic_string>::value, 1345 int> = 0> 1346 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1347 insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n = npos); 1348 1349 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1350 insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n = npos); 1351 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); 1352 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, const value_type* __s); 1353 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& insert(size_type __pos, size_type __n, value_type __c); 1354 _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator insert(const_iterator __pos, value_type __c); 1355 1356 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1357 insert(const_iterator __pos, size_type __n, value_type __c) { 1358 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 1359 "string::insert(iterator, n, value) called with an iterator not referring to this string"); 1360 difference_type __p = __pos - begin(); 1361 insert(static_cast<size_type>(__p), __n, __c); 1362 return begin() + __p; 1363 } 1364 1365 template <class _InputIterator, __enable_if_t<__is_exactly_cpp17_input_iterator<_InputIterator>::value, int> = 0> 1366 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1367 insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); 1368 1369 template <class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> = 0> 1370 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 iterator 1371 insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); 1372 1373#ifndef _LIBCPP_CXX03_LANG 1374 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1375 iterator insert(const_iterator __pos, initializer_list<value_type> __il) 1376 {return insert(__pos, __il.begin(), __il.end());} 1377#endif // _LIBCPP_CXX03_LANG 1378 1379 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& erase(size_type __pos = 0, size_type __n = npos); 1380 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1381 iterator erase(const_iterator __pos); 1382 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1383 iterator erase(const_iterator __first, const_iterator __last); 1384 1385 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1386 replace(size_type __pos1, size_type __n1, const basic_string& __str) { 1387 return replace(__pos1, __n1, __str.data(), __str.size()); 1388 } 1389 1390 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1391 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1392 replace(size_type __pos1, size_type __n1, const _Tp& __t) { 1393 __self_view __sv = __t; 1394 return replace(__pos1, __n1, __sv.data(), __sv.size()); 1395 } 1396 1397 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1398 replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2 = npos); 1399 1400 template <class _Tp, 1401 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1402 !__is_same_uncvref<_Tp, basic_string>::value, 1403 int> = 0> 1404 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1405 replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos); 1406 1407 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1408 replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); 1409 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); 1410 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); 1411 1412 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1413 replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) { 1414 return replace( 1415 static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __str.data(), __str.size()); 1416 } 1417 1418 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1419 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1420 replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { 1421 __self_view __sv = __t; 1422 return replace(__i1 - begin(), __i2 - __i1, __sv); 1423 } 1424 1425 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1426 replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) { 1427 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); 1428 } 1429 1430 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1431 replace(const_iterator __i1, const_iterator __i2, const value_type* __s) { 1432 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); 1433 } 1434 1435 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1436 replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) { 1437 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); 1438 } 1439 1440 template <class _InputIterator, __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value, int> = 0> 1441 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& 1442 replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); 1443 1444#ifndef _LIBCPP_CXX03_LANG 1445 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1446 basic_string& replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) 1447 {return replace(__i1, __i2, __il.begin(), __il.end());} 1448#endif // _LIBCPP_CXX03_LANG 1449 1450 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; 1451 1452#if _LIBCPP_STD_VER <= 20 1453 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1454 basic_string substr(size_type __pos = 0, size_type __n = npos) const { 1455 return basic_string(*this, __pos, __n); 1456 } 1457#else 1458 _LIBCPP_HIDE_FROM_ABI constexpr 1459 basic_string substr(size_type __pos = 0, size_type __n = npos) const& { 1460 return basic_string(*this, __pos, __n); 1461 } 1462 1463 _LIBCPP_HIDE_FROM_ABI constexpr 1464 basic_string substr(size_type __pos = 0, size_type __n = npos) && { 1465 return basic_string(std::move(*this), __pos, __n); 1466 } 1467#endif 1468 1469 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1470 void swap(basic_string& __str) 1471#if _LIBCPP_STD_VER >= 14 1472 _NOEXCEPT; 1473#else 1474 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 1475 __is_nothrow_swappable<allocator_type>::value); 1476#endif 1477 1478 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1479 const value_type* c_str() const _NOEXCEPT {return data();} 1480 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1481 const value_type* data() const _NOEXCEPT {return std::__to_address(__get_pointer());} 1482#if _LIBCPP_STD_VER >= 17 || defined(_LIBCPP_BUILDING_LIBRARY) 1483 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1484 value_type* data() _NOEXCEPT {return std::__to_address(__get_pointer());} 1485#endif 1486 1487 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1488 allocator_type get_allocator() const _NOEXCEPT {return __alloc();} 1489 1490 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1491 size_type find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1492 1493 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1494 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1495 find(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1496 1497 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1498 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1499 size_type find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1500 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1501 1502 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1503 size_type rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1504 1505 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1506 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1507 rfind(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1508 1509 _LIBCPP_CONSTEXPR_SINCE_CXX20 1510 size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1511 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1512 size_type rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1513 _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1514 1515 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1516 size_type find_first_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1517 1518 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1519 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1520 find_first_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1521 1522 _LIBCPP_CONSTEXPR_SINCE_CXX20 1523 size_type find_first_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1524 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1525 size_type find_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1526 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1527 size_type find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1528 1529 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1530 size_type find_last_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1531 1532 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1533 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1534 find_last_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1535 1536 _LIBCPP_CONSTEXPR_SINCE_CXX20 1537 size_type find_last_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1538 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1539 size_type find_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1540 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1541 size_type find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1542 1543 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1544 size_type find_first_not_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1545 1546 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1547 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1548 find_first_not_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1549 1550 _LIBCPP_CONSTEXPR_SINCE_CXX20 1551 size_type find_first_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1552 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1553 size_type find_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1554 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1555 size_type find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1556 1557 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1558 size_type find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1559 1560 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1561 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 size_type 1562 find_last_not_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1563 1564 _LIBCPP_CONSTEXPR_SINCE_CXX20 1565 size_type find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1566 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1567 size_type find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1568 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1569 size_type find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1570 1571 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1572 int compare(const basic_string& __str) const _NOEXCEPT; 1573 1574 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1575 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1576 compare(const _Tp& __t) const _NOEXCEPT; 1577 1578 template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> = 0> 1579 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1580 compare(size_type __pos1, size_type __n1, const _Tp& __t) const; 1581 1582 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1583 int compare(size_type __pos1, size_type __n1, const basic_string& __str) const; 1584 _LIBCPP_CONSTEXPR_SINCE_CXX20 1585 int compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, 1586 size_type __n2 = npos) const; 1587 1588 template <class _Tp, 1589 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 1590 !__is_same_uncvref<_Tp, basic_string>::value, 1591 int> = 0> 1592 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 int 1593 compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2 = npos) const; 1594 1595 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(const value_type* __s) const _NOEXCEPT; 1596 _LIBCPP_CONSTEXPR_SINCE_CXX20 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; 1597 _LIBCPP_CONSTEXPR_SINCE_CXX20 1598 int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; 1599 1600#if _LIBCPP_STD_VER >= 20 1601 constexpr _LIBCPP_HIDE_FROM_ABI 1602 bool starts_with(__self_view __sv) const noexcept 1603 { return __self_view(data(), size()).starts_with(__sv); } 1604 1605 constexpr _LIBCPP_HIDE_FROM_ABI 1606 bool starts_with(value_type __c) const noexcept 1607 { return !empty() && _Traits::eq(front(), __c); } 1608 1609 constexpr _LIBCPP_HIDE_FROM_ABI 1610 bool starts_with(const value_type* __s) const noexcept 1611 { return starts_with(__self_view(__s)); } 1612 1613 constexpr _LIBCPP_HIDE_FROM_ABI 1614 bool ends_with(__self_view __sv) const noexcept 1615 { return __self_view(data(), size()).ends_with( __sv); } 1616 1617 constexpr _LIBCPP_HIDE_FROM_ABI 1618 bool ends_with(value_type __c) const noexcept 1619 { return !empty() && _Traits::eq(back(), __c); } 1620 1621 constexpr _LIBCPP_HIDE_FROM_ABI 1622 bool ends_with(const value_type* __s) const noexcept 1623 { return ends_with(__self_view(__s)); } 1624#endif 1625 1626#if _LIBCPP_STD_VER >= 23 1627 constexpr _LIBCPP_HIDE_FROM_ABI 1628 bool contains(__self_view __sv) const noexcept 1629 { return __self_view(data(), size()).contains(__sv); } 1630 1631 constexpr _LIBCPP_HIDE_FROM_ABI 1632 bool contains(value_type __c) const noexcept 1633 { return __self_view(data(), size()).contains(__c); } 1634 1635 constexpr _LIBCPP_HIDE_FROM_ABI 1636 bool contains(const value_type* __s) const 1637 { return __self_view(data(), size()).contains(__s); } 1638#endif 1639 1640 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool __invariants() const; 1641 1642 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __clear_and_shrink() _NOEXCEPT; 1643 1644#ifdef _LIBCPP_ENABLE_DEBUG_MODE 1645 1646 bool __dereferenceable(const const_iterator* __i) const; 1647 bool __decrementable(const const_iterator* __i) const; 1648 bool __addable(const const_iterator* __i, ptrdiff_t __n) const; 1649 bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const; 1650 1651#endif // _LIBCPP_ENABLE_DEBUG_MODE 1652 1653private: 1654 template<class _Alloc> 1655 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1656 bool friend operator==(const basic_string<char, char_traits<char>, _Alloc>& __lhs, 1657 const basic_string<char, char_traits<char>, _Alloc>& __rhs) _NOEXCEPT; 1658 1659 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __shrink_or_extend(size_type __target_capacity); 1660 1661 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1662 bool __is_long() const _NOEXCEPT { 1663 if (__libcpp_is_constant_evaluated()) 1664 return true; 1665 return __r_.first().__s.__is_long_; 1666 } 1667 1668 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __begin_lifetime(pointer __begin, size_type __n) { 1669#if _LIBCPP_STD_VER >= 20 1670 if (__libcpp_is_constant_evaluated()) { 1671 for (size_type __i = 0; __i != __n; ++__i) 1672 std::construct_at(std::addressof(__begin[__i])); 1673 } 1674#else 1675 (void)__begin; 1676 (void)__n; 1677#endif // _LIBCPP_STD_VER >= 20 1678 } 1679 1680 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __default_init() { 1681 __r_.first() = __rep(); 1682 if (__libcpp_is_constant_evaluated()) { 1683 size_type __sz = __recommend(0) + 1; 1684 pointer __ptr = __alloc_traits::allocate(__alloc(), __sz); 1685 __begin_lifetime(__ptr, __sz); 1686 __set_long_pointer(__ptr); 1687 __set_long_cap(__sz); 1688 __set_long_size(0); 1689 } 1690 } 1691 1692 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __deallocate_constexpr() { 1693 if (__libcpp_is_constant_evaluated() && __get_pointer() != nullptr) 1694 __alloc_traits::deallocate(__alloc(), __get_pointer(), __get_long_cap()); 1695 } 1696 1697 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) { 1698 // SSO is disabled during constant evaluation because `__is_long` isn't constexpr friendly 1699 return !__libcpp_is_constant_evaluated() && (__sz < __min_cap); 1700 } 1701 1702 template <class _ForwardIterator> 1703 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1704 iterator __insert_from_safe_copy(size_type __n, size_type __ip, _ForwardIterator __first, _ForwardIterator __last) { 1705 size_type __sz = size(); 1706 size_type __cap = capacity(); 1707 value_type* __p; 1708 if (__cap - __sz >= __n) 1709 { 1710 __p = std::__to_address(__get_pointer()); 1711 size_type __n_move = __sz - __ip; 1712 if (__n_move != 0) 1713 traits_type::move(__p + __ip + __n, __p + __ip, __n_move); 1714 } 1715 else 1716 { 1717 __grow_by(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); 1718 __p = std::__to_address(__get_long_pointer()); 1719 } 1720 __sz += __n; 1721 __set_size(__sz); 1722 traits_type::assign(__p[__sz], value_type()); 1723 for (__p += __ip; __first != __last; ++__p, ++__first) 1724 traits_type::assign(*__p, *__first); 1725 1726 return begin() + __ip; 1727 } 1728 1729 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 allocator_type& __alloc() _NOEXCEPT { return __r_.second(); } 1730 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR const allocator_type& __alloc() const _NOEXCEPT { return __r_.second(); } 1731 1732 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1733 void __set_short_size(size_type __s) _NOEXCEPT { 1734 _LIBCPP_ASSERT(__s < __min_cap, "__s should never be greater than or equal to the short string capacity"); 1735 __r_.first().__s.__size_ = __s; 1736 __r_.first().__s.__is_long_ = false; 1737 } 1738 1739 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1740 size_type __get_short_size() const _NOEXCEPT { 1741 _LIBCPP_ASSERT(!__r_.first().__s.__is_long_, "String has to be short when trying to get the short size"); 1742 return __r_.first().__s.__size_; 1743 } 1744 1745 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1746 void __set_long_size(size_type __s) _NOEXCEPT 1747 {__r_.first().__l.__size_ = __s;} 1748 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1749 size_type __get_long_size() const _NOEXCEPT 1750 {return __r_.first().__l.__size_;} 1751 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1752 void __set_size(size_type __s) _NOEXCEPT 1753 {if (__is_long()) __set_long_size(__s); else __set_short_size(__s);} 1754 1755 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1756 void __set_long_cap(size_type __s) _NOEXCEPT { 1757 __r_.first().__l.__cap_ = __s / __endian_factor; 1758 __r_.first().__l.__is_long_ = true; 1759 } 1760 1761 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1762 size_type __get_long_cap() const _NOEXCEPT { 1763 return __r_.first().__l.__cap_ * __endian_factor; 1764 } 1765 1766 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1767 void __set_long_pointer(pointer __p) _NOEXCEPT 1768 {__r_.first().__l.__data_ = __p;} 1769 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1770 pointer __get_long_pointer() _NOEXCEPT 1771 {return __r_.first().__l.__data_;} 1772 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1773 const_pointer __get_long_pointer() const _NOEXCEPT 1774 {return __r_.first().__l.__data_;} 1775 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1776 pointer __get_short_pointer() _NOEXCEPT 1777 {return pointer_traits<pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1778 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1779 const_pointer __get_short_pointer() const _NOEXCEPT 1780 {return pointer_traits<const_pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1781 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1782 pointer __get_pointer() _NOEXCEPT 1783 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1784 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1785 const_pointer __get_pointer() const _NOEXCEPT 1786 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1787 1788 template <size_type __a> static 1789 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1790 size_type __align_it(size_type __s) _NOEXCEPT 1791 {return (__s + (__a-1)) & ~(__a-1);} 1792 enum {__alignment = 16}; 1793 static _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1794 size_type __recommend(size_type __s) _NOEXCEPT 1795 { 1796 if (__s < __min_cap) { 1797 if (__libcpp_is_constant_evaluated()) 1798 return static_cast<size_type>(__min_cap); 1799 else 1800 return static_cast<size_type>(__min_cap) - 1; 1801 } 1802 size_type __guess = __align_it<sizeof(value_type) < __alignment ? 1803 __alignment/sizeof(value_type) : 1 > (__s+1) - 1; 1804 if (__guess == __min_cap) ++__guess; 1805 return __guess; 1806 } 1807 1808 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 1809 void __init(const value_type* __s, size_type __sz, size_type __reserve); 1810 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 1811 void __init(const value_type* __s, size_type __sz); 1812 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 1813 void __init(size_type __n, value_type __c); 1814 1815 // Slow path for the (inlined) copy constructor for 'long' strings. 1816 // Always externally instantiated and not inlined. 1817 // Requires that __s is zero terminated. 1818 // The main reason for this function to exist is because for unstable, we 1819 // want to allow inlining of the copy constructor. However, we don't want 1820 // to call the __init() functions as those are marked as inline which may 1821 // result in over-aggressive inlining by the compiler, where our aim is 1822 // to only inline the fast path code directly in the ctor. 1823 _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init_copy_ctor_external(const value_type* __s, size_type __sz); 1824 1825 template <class _InputIterator, __enable_if_t<__is_exactly_cpp17_input_iterator<_InputIterator>::value, int> = 0> 1826 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_InputIterator __first, _InputIterator __last); 1827 1828 template <class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> = 0> 1829 inline _LIBCPP_CONSTEXPR_SINCE_CXX20 void __init(_ForwardIterator __first, _ForwardIterator __last); 1830 1831 _LIBCPP_CONSTEXPR_SINCE_CXX20 1832 void __grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 1833 size_type __n_copy, size_type __n_del, size_type __n_add = 0); 1834 _LIBCPP_CONSTEXPR_SINCE_CXX20 1835 void __grow_by_and_replace(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 1836 size_type __n_copy, size_type __n_del, 1837 size_type __n_add, const value_type* __p_new_stuff); 1838 1839 // __assign_no_alias is invoked for assignment operations where we 1840 // have proof that the input does not alias the current instance. 1841 // For example, operator=(basic_string) performs a 'self' check. 1842 template <bool __is_short> 1843 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_no_alias(const value_type* __s, size_type __n); 1844 1845 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __erase_to_end(size_type __pos) { 1846 __null_terminate_at(std::__to_address(__get_pointer()), __pos); 1847 } 1848 1849 // __erase_external_with_move is invoked for erase() invocations where 1850 // `n ~= npos`, likely requiring memory moves on the string data. 1851 _LIBCPP_CONSTEXPR_SINCE_CXX20 void __erase_external_with_move(size_type __pos, size_type __n); 1852 1853 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1854 void __copy_assign_alloc(const basic_string& __str) 1855 {__copy_assign_alloc(__str, integral_constant<bool, 1856 __alloc_traits::propagate_on_container_copy_assignment::value>());} 1857 1858 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1859 void __copy_assign_alloc(const basic_string& __str, true_type) 1860 { 1861 if (__alloc() == __str.__alloc()) 1862 __alloc() = __str.__alloc(); 1863 else 1864 { 1865 if (!__str.__is_long()) 1866 { 1867 __clear_and_shrink(); 1868 __alloc() = __str.__alloc(); 1869 } 1870 else 1871 { 1872 allocator_type __a = __str.__alloc(); 1873 auto __allocation = std::__allocate_at_least(__a, __str.__get_long_cap()); 1874 __begin_lifetime(__allocation.ptr, __allocation.count); 1875 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 1876 __alloc() = std::move(__a); 1877 __set_long_pointer(__allocation.ptr); 1878 __set_long_cap(__allocation.count); 1879 __set_long_size(__str.size()); 1880 } 1881 } 1882 } 1883 1884 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1885 void __copy_assign_alloc(const basic_string&, false_type) _NOEXCEPT 1886 {} 1887 1888#ifndef _LIBCPP_CXX03_LANG 1889 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1890 void __move_assign(basic_string& __str, false_type) 1891 _NOEXCEPT_(__alloc_traits::is_always_equal::value); 1892 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1893 void __move_assign(basic_string& __str, true_type) 1894#if _LIBCPP_STD_VER >= 17 1895 _NOEXCEPT; 1896#else 1897 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value); 1898#endif 1899#endif 1900 1901 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1902 void 1903 __move_assign_alloc(basic_string& __str) 1904 _NOEXCEPT_( 1905 !__alloc_traits::propagate_on_container_move_assignment::value || 1906 is_nothrow_move_assignable<allocator_type>::value) 1907 {__move_assign_alloc(__str, integral_constant<bool, 1908 __alloc_traits::propagate_on_container_move_assignment::value>());} 1909 1910 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1911 void __move_assign_alloc(basic_string& __c, true_type) 1912 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 1913 { 1914 __alloc() = std::move(__c.__alloc()); 1915 } 1916 1917 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1918 void __move_assign_alloc(basic_string&, false_type) 1919 _NOEXCEPT 1920 {} 1921 1922 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_external(const value_type* __s); 1923 _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string& __assign_external(const value_type* __s, size_type __n); 1924 1925 // Assigns the value in __s, guaranteed to be __n < __min_cap in length. 1926 inline basic_string& __assign_short(const value_type* __s, size_type __n) { 1927 pointer __p = __is_long() 1928 ? (__set_long_size(__n), __get_long_pointer()) 1929 : (__set_short_size(__n), __get_short_pointer()); 1930 traits_type::move(std::__to_address(__p), __s, __n); 1931 traits_type::assign(__p[__n], value_type()); 1932 return *this; 1933 } 1934 1935 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1936 basic_string& __null_terminate_at(value_type* __p, size_type __newsz) { 1937 __set_size(__newsz); 1938 __invalidate_iterators_past(__newsz); 1939 traits_type::assign(__p[__newsz], value_type()); 1940 return *this; 1941 } 1942 1943 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void __invalidate_iterators_past(size_type); 1944 1945 template<class _Tp> 1946 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1947 bool __addr_in_range(_Tp&& __t) const { 1948 // assume that the ranges overlap, because we can't check during constant evaluation 1949 if (__libcpp_is_constant_evaluated()) 1950 return true; 1951 const volatile void *__p = std::addressof(__t); 1952 return data() <= __p && __p <= data() + size(); 1953 } 1954 1955 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI 1956 void __throw_length_error() const { 1957 std::__throw_length_error("basic_string"); 1958 } 1959 1960 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI 1961 void __throw_out_of_range() const { 1962 std::__throw_out_of_range("basic_string"); 1963 } 1964 1965 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, const basic_string&); 1966 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const value_type*, const basic_string&); 1967 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(value_type, const basic_string&); 1968 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, const value_type*); 1969 friend _LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string operator+<>(const basic_string&, value_type); 1970}; 1971 1972// These declarations must appear before any functions are implicitly used 1973// so that they have the correct visibility specifier. 1974#define _LIBCPP_DECLARE(...) extern template __VA_ARGS__; 1975#ifdef _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 1976 _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 1977# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 1978 _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 1979# endif 1980#else 1981 _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, char) 1982# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 1983 _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_DECLARE, wchar_t) 1984# endif 1985#endif 1986#undef _LIBCPP_DECLARE 1987 1988 1989#if _LIBCPP_STD_VER >= 17 1990template<class _InputIterator, 1991 class _CharT = __iter_value_type<_InputIterator>, 1992 class _Allocator = allocator<_CharT>, 1993 class = enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>, 1994 class = enable_if_t<__is_allocator<_Allocator>::value> 1995 > 1996basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator()) 1997 -> basic_string<_CharT, char_traits<_CharT>, _Allocator>; 1998 1999template<class _CharT, 2000 class _Traits, 2001 class _Allocator = allocator<_CharT>, 2002 class = enable_if_t<__is_allocator<_Allocator>::value> 2003 > 2004explicit basic_string(basic_string_view<_CharT, _Traits>, const _Allocator& = _Allocator()) 2005 -> basic_string<_CharT, _Traits, _Allocator>; 2006 2007template<class _CharT, 2008 class _Traits, 2009 class _Allocator = allocator<_CharT>, 2010 class = enable_if_t<__is_allocator<_Allocator>::value>, 2011 class _Sz = typename allocator_traits<_Allocator>::size_type 2012 > 2013basic_string(basic_string_view<_CharT, _Traits>, _Sz, _Sz, const _Allocator& = _Allocator()) 2014 -> basic_string<_CharT, _Traits, _Allocator>; 2015#endif 2016 2017template <class _CharT, class _Traits, class _Allocator> 2018inline _LIBCPP_CONSTEXPR_SINCE_CXX20 2019void 2020basic_string<_CharT, _Traits, _Allocator>::__invalidate_iterators_past(size_type __pos) 2021{ 2022#ifdef _LIBCPP_ENABLE_DEBUG_MODE 2023 if (!__libcpp_is_constant_evaluated()) { 2024 __c_node* __c = __get_db()->__find_c_and_lock(this); 2025 if (__c) 2026 { 2027 const_pointer __new_last = __get_pointer() + __pos; 2028 for (__i_node** __p = __c->end_; __p != __c->beg_; ) 2029 { 2030 --__p; 2031 const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_); 2032 if (__i->base() > __new_last) 2033 { 2034 (*__p)->__c_ = nullptr; 2035 if (--__c->end_ != __p) 2036 std::memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*)); 2037 } 2038 } 2039 __get_db()->unlock(); 2040 } 2041 } 2042#else 2043 (void)__pos; 2044#endif // _LIBCPP_ENABLE_DEBUG_MODE 2045} 2046 2047template <class _CharT, class _Traits, class _Allocator> 2048_LIBCPP_CONSTEXPR_SINCE_CXX20 2049void basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, 2050 size_type __sz, 2051 size_type __reserve) 2052{ 2053 if (__libcpp_is_constant_evaluated()) 2054 __r_.first() = __rep(); 2055 if (__reserve > max_size()) 2056 __throw_length_error(); 2057 pointer __p; 2058 if (__fits_in_sso(__reserve)) 2059 { 2060 __set_short_size(__sz); 2061 __p = __get_short_pointer(); 2062 } 2063 else 2064 { 2065 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__reserve) + 1); 2066 __p = __allocation.ptr; 2067 __begin_lifetime(__p, __allocation.count); 2068 __set_long_pointer(__p); 2069 __set_long_cap(__allocation.count); 2070 __set_long_size(__sz); 2071 } 2072 traits_type::copy(std::__to_address(__p), __s, __sz); 2073 traits_type::assign(__p[__sz], value_type()); 2074} 2075 2076template <class _CharT, class _Traits, class _Allocator> 2077_LIBCPP_CONSTEXPR_SINCE_CXX20 2078void 2079basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz) 2080{ 2081 if (__libcpp_is_constant_evaluated()) 2082 __r_.first() = __rep(); 2083 if (__sz > max_size()) 2084 __throw_length_error(); 2085 pointer __p; 2086 if (__fits_in_sso(__sz)) 2087 { 2088 __set_short_size(__sz); 2089 __p = __get_short_pointer(); 2090 } 2091 else 2092 { 2093 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2094 __p = __allocation.ptr; 2095 __begin_lifetime(__p, __allocation.count); 2096 __set_long_pointer(__p); 2097 __set_long_cap(__allocation.count); 2098 __set_long_size(__sz); 2099 } 2100 traits_type::copy(std::__to_address(__p), __s, __sz); 2101 traits_type::assign(__p[__sz], value_type()); 2102} 2103 2104template <class _CharT, class _Traits, class _Allocator> 2105_LIBCPP_CONSTEXPR_SINCE_CXX20 2106void basic_string<_CharT, _Traits, _Allocator>::__init_copy_ctor_external( 2107 const value_type* __s, size_type __sz) { 2108 if (__libcpp_is_constant_evaluated()) 2109 __r_.first() = __rep(); 2110 2111 pointer __p; 2112 if (__fits_in_sso(__sz)) { 2113 __p = __get_short_pointer(); 2114 __set_short_size(__sz); 2115 } else { 2116 if (__sz > max_size()) 2117 __throw_length_error(); 2118 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2119 __p = __allocation.ptr; 2120 __begin_lifetime(__p, __allocation.count); 2121 __set_long_pointer(__p); 2122 __set_long_cap(__allocation.count); 2123 __set_long_size(__sz); 2124 } 2125 traits_type::copy(std::__to_address(__p), __s, __sz + 1); 2126} 2127 2128template <class _CharT, class _Traits, class _Allocator> 2129_LIBCPP_CONSTEXPR_SINCE_CXX20 2130void 2131basic_string<_CharT, _Traits, _Allocator>::__init(size_type __n, value_type __c) 2132{ 2133 if (__libcpp_is_constant_evaluated()) 2134 __r_.first() = __rep(); 2135 2136 if (__n > max_size()) 2137 __throw_length_error(); 2138 pointer __p; 2139 if (__fits_in_sso(__n)) 2140 { 2141 __set_short_size(__n); 2142 __p = __get_short_pointer(); 2143 } 2144 else 2145 { 2146 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__n) + 1); 2147 __p = __allocation.ptr; 2148 __begin_lifetime(__p, __allocation.count); 2149 __set_long_pointer(__p); 2150 __set_long_cap(__allocation.count); 2151 __set_long_size(__n); 2152 } 2153 traits_type::assign(std::__to_address(__p), __n, __c); 2154 traits_type::assign(__p[__n], value_type()); 2155} 2156 2157template <class _CharT, class _Traits, class _Allocator> 2158template <class _InputIterator, __enable_if_t<__is_exactly_cpp17_input_iterator<_InputIterator>::value, int> > 2159_LIBCPP_CONSTEXPR_SINCE_CXX20 2160void basic_string<_CharT, _Traits, _Allocator>::__init(_InputIterator __first, _InputIterator __last) 2161{ 2162 __default_init(); 2163#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2164 try 2165 { 2166#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2167 for (; __first != __last; ++__first) 2168 push_back(*__first); 2169#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2170 } 2171 catch (...) 2172 { 2173 if (__is_long()) 2174 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2175 throw; 2176 } 2177#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2178} 2179 2180template <class _CharT, class _Traits, class _Allocator> 2181template <class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> > 2182_LIBCPP_CONSTEXPR_SINCE_CXX20 void 2183basic_string<_CharT, _Traits, _Allocator>::__init(_ForwardIterator __first, _ForwardIterator __last) 2184{ 2185 if (__libcpp_is_constant_evaluated()) 2186 __r_.first() = __rep(); 2187 size_type __sz = static_cast<size_type>(std::distance(__first, __last)); 2188 if (__sz > max_size()) 2189 __throw_length_error(); 2190 pointer __p; 2191 if (__fits_in_sso(__sz)) 2192 { 2193 __set_short_size(__sz); 2194 __p = __get_short_pointer(); 2195 } 2196 else 2197 { 2198 auto __allocation = std::__allocate_at_least(__alloc(), __recommend(__sz) + 1); 2199 __p = __allocation.ptr; 2200 __begin_lifetime(__p, __allocation.count); 2201 __set_long_pointer(__p); 2202 __set_long_cap(__allocation.count); 2203 __set_long_size(__sz); 2204 } 2205 2206#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2207 try 2208 { 2209#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2210 for (; __first != __last; ++__first, (void) ++__p) 2211 traits_type::assign(*__p, *__first); 2212 traits_type::assign(*__p, value_type()); 2213#ifndef _LIBCPP_HAS_NO_EXCEPTIONS 2214 } 2215 catch (...) 2216 { 2217 if (__is_long()) 2218 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2219 throw; 2220 } 2221#endif // _LIBCPP_HAS_NO_EXCEPTIONS 2222} 2223 2224template <class _CharT, class _Traits, class _Allocator> 2225_LIBCPP_CONSTEXPR_SINCE_CXX20 2226void 2227basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace 2228 (size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2229 size_type __n_copy, size_type __n_del, size_type __n_add, const value_type* __p_new_stuff) 2230{ 2231 size_type __ms = max_size(); 2232 if (__delta_cap > __ms - __old_cap - 1) 2233 __throw_length_error(); 2234 pointer __old_p = __get_pointer(); 2235 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2236 __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2237 __ms - 1; 2238 auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); 2239 pointer __p = __allocation.ptr; 2240 __begin_lifetime(__p, __allocation.count); 2241 std::__debug_db_invalidate_all(this); 2242 if (__n_copy != 0) 2243 traits_type::copy(std::__to_address(__p), 2244 std::__to_address(__old_p), __n_copy); 2245 if (__n_add != 0) 2246 traits_type::copy(std::__to_address(__p) + __n_copy, __p_new_stuff, __n_add); 2247 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2248 if (__sec_cp_sz != 0) 2249 traits_type::copy(std::__to_address(__p) + __n_copy + __n_add, 2250 std::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2251 if (__old_cap+1 != __min_cap || __libcpp_is_constant_evaluated()) 2252 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1); 2253 __set_long_pointer(__p); 2254 __set_long_cap(__allocation.count); 2255 __old_sz = __n_copy + __n_add + __sec_cp_sz; 2256 __set_long_size(__old_sz); 2257 traits_type::assign(__p[__old_sz], value_type()); 2258} 2259 2260template <class _CharT, class _Traits, class _Allocator> 2261void 2262_LIBCPP_CONSTEXPR_SINCE_CXX20 2263basic_string<_CharT, _Traits, _Allocator>::__grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2264 size_type __n_copy, size_type __n_del, size_type __n_add) 2265{ 2266 size_type __ms = max_size(); 2267 if (__delta_cap > __ms - __old_cap) 2268 __throw_length_error(); 2269 pointer __old_p = __get_pointer(); 2270 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2271 __recommend(std::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2272 __ms - 1; 2273 auto __allocation = std::__allocate_at_least(__alloc(), __cap + 1); 2274 pointer __p = __allocation.ptr; 2275 __begin_lifetime(__p, __allocation.count); 2276 std::__debug_db_invalidate_all(this); 2277 if (__n_copy != 0) 2278 traits_type::copy(std::__to_address(__p), 2279 std::__to_address(__old_p), __n_copy); 2280 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2281 if (__sec_cp_sz != 0) 2282 traits_type::copy(std::__to_address(__p) + __n_copy + __n_add, 2283 std::__to_address(__old_p) + __n_copy + __n_del, 2284 __sec_cp_sz); 2285 if (__libcpp_is_constant_evaluated() || __old_cap + 1 != __min_cap) 2286 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap + 1); 2287 __set_long_pointer(__p); 2288 __set_long_cap(__allocation.count); 2289} 2290 2291// assign 2292 2293template <class _CharT, class _Traits, class _Allocator> 2294template <bool __is_short> 2295_LIBCPP_CONSTEXPR_SINCE_CXX20 2296basic_string<_CharT, _Traits, _Allocator>& 2297basic_string<_CharT, _Traits, _Allocator>::__assign_no_alias( 2298 const value_type* __s, size_type __n) { 2299 size_type __cap = __is_short ? static_cast<size_type>(__min_cap) : __get_long_cap(); 2300 if (__n < __cap) { 2301 pointer __p = __is_short ? __get_short_pointer() : __get_long_pointer(); 2302 __is_short ? __set_short_size(__n) : __set_long_size(__n); 2303 traits_type::copy(std::__to_address(__p), __s, __n); 2304 traits_type::assign(__p[__n], value_type()); 2305 __invalidate_iterators_past(__n); 2306 } else { 2307 size_type __sz = __is_short ? __get_short_size() : __get_long_size(); 2308 __grow_by_and_replace(__cap - 1, __n - __cap + 1, __sz, 0, __sz, __n, __s); 2309 } 2310 return *this; 2311} 2312 2313template <class _CharT, class _Traits, class _Allocator> 2314_LIBCPP_CONSTEXPR_SINCE_CXX20 2315basic_string<_CharT, _Traits, _Allocator>& 2316basic_string<_CharT, _Traits, _Allocator>::__assign_external( 2317 const value_type* __s, size_type __n) { 2318 size_type __cap = capacity(); 2319 if (__cap >= __n) { 2320 value_type* __p = std::__to_address(__get_pointer()); 2321 traits_type::move(__p, __s, __n); 2322 return __null_terminate_at(__p, __n); 2323 } else { 2324 size_type __sz = size(); 2325 __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); 2326 return *this; 2327 } 2328} 2329 2330template <class _CharT, class _Traits, class _Allocator> 2331_LIBCPP_CONSTEXPR_SINCE_CXX20 2332basic_string<_CharT, _Traits, _Allocator>& 2333basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s, size_type __n) 2334{ 2335 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::assign received nullptr"); 2336 return (__builtin_constant_p(__n) && __fits_in_sso(__n)) 2337 ? __assign_short(__s, __n) 2338 : __assign_external(__s, __n); 2339} 2340 2341template <class _CharT, class _Traits, class _Allocator> 2342_LIBCPP_CONSTEXPR_SINCE_CXX20 2343basic_string<_CharT, _Traits, _Allocator>& 2344basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) 2345{ 2346 size_type __cap = capacity(); 2347 if (__cap < __n) 2348 { 2349 size_type __sz = size(); 2350 __grow_by(__cap, __n - __cap, __sz, 0, __sz); 2351 } 2352 value_type* __p = std::__to_address(__get_pointer()); 2353 traits_type::assign(__p, __n, __c); 2354 return __null_terminate_at(__p, __n); 2355} 2356 2357template <class _CharT, class _Traits, class _Allocator> 2358_LIBCPP_CONSTEXPR_SINCE_CXX20 2359basic_string<_CharT, _Traits, _Allocator>& 2360basic_string<_CharT, _Traits, _Allocator>::operator=(value_type __c) 2361{ 2362 pointer __p; 2363 if (__is_long()) 2364 { 2365 __p = __get_long_pointer(); 2366 __set_long_size(1); 2367 } 2368 else 2369 { 2370 __p = __get_short_pointer(); 2371 __set_short_size(1); 2372 } 2373 traits_type::assign(*__p, __c); 2374 traits_type::assign(*++__p, value_type()); 2375 __invalidate_iterators_past(1); 2376 return *this; 2377} 2378 2379template <class _CharT, class _Traits, class _Allocator> 2380_LIBCPP_CONSTEXPR_SINCE_CXX20 2381basic_string<_CharT, _Traits, _Allocator>& 2382basic_string<_CharT, _Traits, _Allocator>::operator=(const basic_string& __str) 2383{ 2384 if (this != std::addressof(__str)) { 2385 __copy_assign_alloc(__str); 2386 if (!__is_long()) { 2387 if (!__str.__is_long()) { 2388 __r_.first() = __str.__r_.first(); 2389 } else { 2390 return __assign_no_alias<true>(__str.data(), __str.size()); 2391 } 2392 } else { 2393 return __assign_no_alias<false>(__str.data(), __str.size()); 2394 } 2395 } 2396 return *this; 2397} 2398 2399#ifndef _LIBCPP_CXX03_LANG 2400 2401template <class _CharT, class _Traits, class _Allocator> 2402inline _LIBCPP_CONSTEXPR_SINCE_CXX20 2403void 2404basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, false_type) 2405 _NOEXCEPT_(__alloc_traits::is_always_equal::value) 2406{ 2407 if (__alloc() != __str.__alloc()) 2408 assign(__str); 2409 else 2410 __move_assign(__str, true_type()); 2411} 2412 2413template <class _CharT, class _Traits, class _Allocator> 2414inline _LIBCPP_CONSTEXPR_SINCE_CXX20 2415void 2416basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type) 2417#if _LIBCPP_STD_VER >= 17 2418 _NOEXCEPT 2419#else 2420 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 2421#endif 2422{ 2423 if (__is_long()) { 2424 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), 2425 __get_long_cap()); 2426#if _LIBCPP_STD_VER <= 14 2427 if (!is_nothrow_move_assignable<allocator_type>::value) { 2428 __set_short_size(0); 2429 traits_type::assign(__get_short_pointer()[0], value_type()); 2430 } 2431#endif 2432 } 2433 __move_assign_alloc(__str); 2434 __r_.first() = __str.__r_.first(); 2435 if (__libcpp_is_constant_evaluated()) { 2436 __str.__default_init(); 2437 } else { 2438 __str.__set_short_size(0); 2439 traits_type::assign(__str.__get_short_pointer()[0], value_type()); 2440 } 2441} 2442 2443#endif 2444 2445template <class _CharT, class _Traits, class _Allocator> 2446template<class _InputIterator, __enable_if_t<__is_exactly_cpp17_input_iterator<_InputIterator>::value, int> > 2447_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2448basic_string<_CharT, _Traits, _Allocator>::assign(_InputIterator __first, _InputIterator __last) 2449{ 2450 const basic_string __temp(__first, __last, __alloc()); 2451 assign(__temp.data(), __temp.size()); 2452 return *this; 2453} 2454 2455template <class _CharT, class _Traits, class _Allocator> 2456template<class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> > 2457_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2458basic_string<_CharT, _Traits, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last) 2459{ 2460 size_type __cap = capacity(); 2461 size_type __n = __string_is_trivial_iterator<_ForwardIterator>::value ? 2462 static_cast<size_type>(std::distance(__first, __last)) : 0; 2463 2464 if (__string_is_trivial_iterator<_ForwardIterator>::value && 2465 (__cap >= __n || !__addr_in_range(*__first))) 2466 { 2467 if (__cap < __n) 2468 { 2469 size_type __sz = size(); 2470 __grow_by(__cap, __n - __cap, __sz, 0, __sz); 2471 } 2472 pointer __p = __get_pointer(); 2473 for (; __first != __last; ++__p, (void) ++__first) 2474 traits_type::assign(*__p, *__first); 2475 traits_type::assign(*__p, value_type()); 2476 __set_size(__n); 2477 __invalidate_iterators_past(__n); 2478 } 2479 else 2480 { 2481 const basic_string __temp(__first, __last, __alloc()); 2482 assign(__temp.data(), __temp.size()); 2483 } 2484 return *this; 2485} 2486 2487template <class _CharT, class _Traits, class _Allocator> 2488_LIBCPP_CONSTEXPR_SINCE_CXX20 2489basic_string<_CharT, _Traits, _Allocator>& 2490basic_string<_CharT, _Traits, _Allocator>::assign(const basic_string& __str, size_type __pos, size_type __n) 2491{ 2492 size_type __sz = __str.size(); 2493 if (__pos > __sz) 2494 __throw_out_of_range(); 2495 return assign(__str.data() + __pos, std::min(__n, __sz - __pos)); 2496} 2497 2498template <class _CharT, class _Traits, class _Allocator> 2499template <class _Tp, 2500 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2501 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2502 int> > 2503_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2504basic_string<_CharT, _Traits, _Allocator>::assign(const _Tp& __t, size_type __pos, size_type __n) { 2505 __self_view __sv = __t; 2506 size_type __sz = __sv.size(); 2507 if (__pos > __sz) 2508 __throw_out_of_range(); 2509 return assign(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2510} 2511 2512template <class _CharT, class _Traits, class _Allocator> 2513_LIBCPP_CONSTEXPR_SINCE_CXX20 2514basic_string<_CharT, _Traits, _Allocator>& 2515basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s) { 2516 return __assign_external(__s, traits_type::length(__s)); 2517} 2518 2519template <class _CharT, class _Traits, class _Allocator> 2520_LIBCPP_CONSTEXPR_SINCE_CXX20 2521basic_string<_CharT, _Traits, _Allocator>& 2522basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s) 2523{ 2524 _LIBCPP_ASSERT(__s != nullptr, "string::assign received nullptr"); 2525 return __builtin_constant_p(*__s) 2526 ? (__fits_in_sso(traits_type::length(__s)) 2527 ? __assign_short(__s, traits_type::length(__s)) 2528 : __assign_external(__s, traits_type::length(__s))) 2529 : __assign_external(__s); 2530} 2531// append 2532 2533template <class _CharT, class _Traits, class _Allocator> 2534_LIBCPP_CONSTEXPR_SINCE_CXX20 2535basic_string<_CharT, _Traits, _Allocator>& 2536basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s, size_type __n) 2537{ 2538 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::append received nullptr"); 2539 size_type __cap = capacity(); 2540 size_type __sz = size(); 2541 if (__cap - __sz >= __n) 2542 { 2543 if (__n) 2544 { 2545 value_type* __p = std::__to_address(__get_pointer()); 2546 traits_type::copy(__p + __sz, __s, __n); 2547 __sz += __n; 2548 __set_size(__sz); 2549 traits_type::assign(__p[__sz], value_type()); 2550 } 2551 } 2552 else 2553 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __sz, 0, __n, __s); 2554 return *this; 2555} 2556 2557template <class _CharT, class _Traits, class _Allocator> 2558_LIBCPP_CONSTEXPR_SINCE_CXX20 2559basic_string<_CharT, _Traits, _Allocator>& 2560basic_string<_CharT, _Traits, _Allocator>::append(size_type __n, value_type __c) 2561{ 2562 if (__n) 2563 { 2564 size_type __cap = capacity(); 2565 size_type __sz = size(); 2566 if (__cap - __sz < __n) 2567 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2568 pointer __p = __get_pointer(); 2569 traits_type::assign(std::__to_address(__p) + __sz, __n, __c); 2570 __sz += __n; 2571 __set_size(__sz); 2572 traits_type::assign(__p[__sz], value_type()); 2573 } 2574 return *this; 2575} 2576 2577template <class _CharT, class _Traits, class _Allocator> 2578_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 2579basic_string<_CharT, _Traits, _Allocator>::__append_default_init(size_type __n) 2580{ 2581 if (__n) 2582 { 2583 size_type __cap = capacity(); 2584 size_type __sz = size(); 2585 if (__cap - __sz < __n) 2586 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2587 pointer __p = __get_pointer(); 2588 __sz += __n; 2589 __set_size(__sz); 2590 traits_type::assign(__p[__sz], value_type()); 2591 } 2592} 2593 2594template <class _CharT, class _Traits, class _Allocator> 2595_LIBCPP_CONSTEXPR_SINCE_CXX20 2596void 2597basic_string<_CharT, _Traits, _Allocator>::push_back(value_type __c) 2598{ 2599 bool __is_short = !__is_long(); 2600 size_type __cap; 2601 size_type __sz; 2602 if (__is_short) 2603 { 2604 __cap = __min_cap - 1; 2605 __sz = __get_short_size(); 2606 } 2607 else 2608 { 2609 __cap = __get_long_cap() - 1; 2610 __sz = __get_long_size(); 2611 } 2612 if (__sz == __cap) 2613 { 2614 __grow_by(__cap, 1, __sz, __sz, 0); 2615 __is_short = false; // the string is always long after __grow_by 2616 } 2617 pointer __p = __get_pointer(); 2618 if (__is_short) 2619 { 2620 __p = __get_short_pointer() + __sz; 2621 __set_short_size(__sz+1); 2622 } 2623 else 2624 { 2625 __p = __get_long_pointer() + __sz; 2626 __set_long_size(__sz+1); 2627 } 2628 traits_type::assign(*__p, __c); 2629 traits_type::assign(*++__p, value_type()); 2630} 2631 2632template <class _CharT, class _Traits, class _Allocator> 2633template<class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> > 2634_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2635basic_string<_CharT, _Traits, _Allocator>::append( 2636 _ForwardIterator __first, _ForwardIterator __last) 2637{ 2638 size_type __sz = size(); 2639 size_type __cap = capacity(); 2640 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2641 if (__n) 2642 { 2643 if (__string_is_trivial_iterator<_ForwardIterator>::value && 2644 !__addr_in_range(*__first)) 2645 { 2646 if (__cap - __sz < __n) 2647 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2648 pointer __p = __get_pointer() + __sz; 2649 for (; __first != __last; ++__p, (void) ++__first) 2650 traits_type::assign(*__p, *__first); 2651 traits_type::assign(*__p, value_type()); 2652 __set_size(__sz + __n); 2653 } 2654 else 2655 { 2656 const basic_string __temp(__first, __last, __alloc()); 2657 append(__temp.data(), __temp.size()); 2658 } 2659 } 2660 return *this; 2661} 2662 2663template <class _CharT, class _Traits, class _Allocator> 2664_LIBCPP_CONSTEXPR_SINCE_CXX20 2665basic_string<_CharT, _Traits, _Allocator>& 2666basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str, size_type __pos, size_type __n) 2667{ 2668 size_type __sz = __str.size(); 2669 if (__pos > __sz) 2670 __throw_out_of_range(); 2671 return append(__str.data() + __pos, std::min(__n, __sz - __pos)); 2672} 2673 2674template <class _CharT, class _Traits, class _Allocator> 2675template <class _Tp, 2676 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2677 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2678 int> > 2679_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2680basic_string<_CharT, _Traits, _Allocator>::append(const _Tp& __t, size_type __pos, size_type __n) { 2681 __self_view __sv = __t; 2682 size_type __sz = __sv.size(); 2683 if (__pos > __sz) 2684 __throw_out_of_range(); 2685 return append(__sv.data() + __pos, std::min(__n, __sz - __pos)); 2686} 2687 2688template <class _CharT, class _Traits, class _Allocator> 2689_LIBCPP_CONSTEXPR_SINCE_CXX20 2690basic_string<_CharT, _Traits, _Allocator>& 2691basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s) 2692{ 2693 _LIBCPP_ASSERT(__s != nullptr, "string::append received nullptr"); 2694 return append(__s, traits_type::length(__s)); 2695} 2696 2697// insert 2698 2699template <class _CharT, class _Traits, class _Allocator> 2700_LIBCPP_CONSTEXPR_SINCE_CXX20 2701basic_string<_CharT, _Traits, _Allocator>& 2702basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s, size_type __n) 2703{ 2704 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::insert received nullptr"); 2705 size_type __sz = size(); 2706 if (__pos > __sz) 2707 __throw_out_of_range(); 2708 size_type __cap = capacity(); 2709 if (__libcpp_is_constant_evaluated()) { 2710 if (__cap - __sz >= __n) 2711 __grow_by_and_replace(__cap, 0, __sz, __pos, 0, __n, __s); 2712 else 2713 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); 2714 return *this; 2715 } 2716 if (__cap - __sz >= __n) 2717 { 2718 if (__n) 2719 { 2720 value_type* __p = std::__to_address(__get_pointer()); 2721 size_type __n_move = __sz - __pos; 2722 if (__n_move != 0) 2723 { 2724 if (__p + __pos <= __s && __s < __p + __sz) 2725 __s += __n; 2726 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 2727 } 2728 traits_type::move(__p + __pos, __s, __n); 2729 __sz += __n; 2730 __set_size(__sz); 2731 traits_type::assign(__p[__sz], value_type()); 2732 } 2733 } 2734 else 2735 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); 2736 return *this; 2737} 2738 2739template <class _CharT, class _Traits, class _Allocator> 2740_LIBCPP_CONSTEXPR_SINCE_CXX20 2741basic_string<_CharT, _Traits, _Allocator>& 2742basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, size_type __n, value_type __c) 2743{ 2744 size_type __sz = size(); 2745 if (__pos > __sz) 2746 __throw_out_of_range(); 2747 if (__n) 2748 { 2749 size_type __cap = capacity(); 2750 value_type* __p; 2751 if (__cap - __sz >= __n) 2752 { 2753 __p = std::__to_address(__get_pointer()); 2754 size_type __n_move = __sz - __pos; 2755 if (__n_move != 0) 2756 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 2757 } 2758 else 2759 { 2760 __grow_by(__cap, __sz + __n - __cap, __sz, __pos, 0, __n); 2761 __p = std::__to_address(__get_long_pointer()); 2762 } 2763 traits_type::assign(__p + __pos, __n, __c); 2764 __sz += __n; 2765 __set_size(__sz); 2766 traits_type::assign(__p[__sz], value_type()); 2767 } 2768 return *this; 2769} 2770 2771template <class _CharT, class _Traits, class _Allocator> 2772template<class _InputIterator, __enable_if_t<__is_exactly_cpp17_input_iterator<_InputIterator>::value, int> > 2773_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 2774basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) 2775{ 2776 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2777 "string::insert(iterator, range) called with an iterator not" 2778 " referring to this string"); 2779 const basic_string __temp(__first, __last, __alloc()); 2780 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 2781} 2782 2783template <class _CharT, class _Traits, class _Allocator> 2784template<class _ForwardIterator, __enable_if_t<__is_cpp17_forward_iterator<_ForwardIterator>::value, int> > 2785_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::iterator 2786basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) 2787{ 2788 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2789 "string::insert(iterator, range) called with an iterator not referring to this string"); 2790 2791 size_type __ip = static_cast<size_type>(__pos - begin()); 2792 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2793 if (__n == 0) 2794 return begin() + __ip; 2795 2796 if (__string_is_trivial_iterator<_ForwardIterator>::value && !__addr_in_range(*__first)) 2797 { 2798 return __insert_from_safe_copy(__n, __ip, __first, __last); 2799 } 2800 else 2801 { 2802 const basic_string __temp(__first, __last, __alloc()); 2803 return __insert_from_safe_copy(__n, __ip, __temp.begin(), __temp.end()); 2804 } 2805} 2806 2807template <class _CharT, class _Traits, class _Allocator> 2808_LIBCPP_CONSTEXPR_SINCE_CXX20 2809basic_string<_CharT, _Traits, _Allocator>& 2810basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str, 2811 size_type __pos2, size_type __n) 2812{ 2813 size_type __str_sz = __str.size(); 2814 if (__pos2 > __str_sz) 2815 __throw_out_of_range(); 2816 return insert(__pos1, __str.data() + __pos2, std::min(__n, __str_sz - __pos2)); 2817} 2818 2819template <class _CharT, class _Traits, class _Allocator> 2820template <class _Tp, 2821 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2822 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2823 int> > 2824_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2825basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n) { 2826 __self_view __sv = __t; 2827 size_type __str_sz = __sv.size(); 2828 if (__pos2 > __str_sz) 2829 __throw_out_of_range(); 2830 return insert(__pos1, __sv.data() + __pos2, std::min(__n, __str_sz - __pos2)); 2831} 2832 2833template <class _CharT, class _Traits, class _Allocator> 2834_LIBCPP_CONSTEXPR_SINCE_CXX20 2835basic_string<_CharT, _Traits, _Allocator>& 2836basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) 2837{ 2838 _LIBCPP_ASSERT(__s != nullptr, "string::insert received nullptr"); 2839 return insert(__pos, __s, traits_type::length(__s)); 2840} 2841 2842template <class _CharT, class _Traits, class _Allocator> 2843_LIBCPP_CONSTEXPR_SINCE_CXX20 2844typename basic_string<_CharT, _Traits, _Allocator>::iterator 2845basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) 2846{ 2847 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2848 "string::insert(iterator, character) called with an iterator not" 2849 " referring to this string"); 2850 2851 size_type __ip = static_cast<size_type>(__pos - begin()); 2852 size_type __sz = size(); 2853 size_type __cap = capacity(); 2854 value_type* __p; 2855 if (__cap == __sz) 2856 { 2857 __grow_by(__cap, 1, __sz, __ip, 0, 1); 2858 __p = std::__to_address(__get_long_pointer()); 2859 } 2860 else 2861 { 2862 __p = std::__to_address(__get_pointer()); 2863 size_type __n_move = __sz - __ip; 2864 if (__n_move != 0) 2865 traits_type::move(__p + __ip + 1, __p + __ip, __n_move); 2866 } 2867 traits_type::assign(__p[__ip], __c); 2868 traits_type::assign(__p[++__sz], value_type()); 2869 __set_size(__sz); 2870 return begin() + static_cast<difference_type>(__ip); 2871} 2872 2873// replace 2874 2875template <class _CharT, class _Traits, class _Allocator> 2876_LIBCPP_CONSTEXPR_SINCE_CXX20 2877basic_string<_CharT, _Traits, _Allocator>& 2878basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2) 2879 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 2880{ 2881 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); 2882 size_type __sz = size(); 2883 if (__pos > __sz) 2884 __throw_out_of_range(); 2885 __n1 = std::min(__n1, __sz - __pos); 2886 size_type __cap = capacity(); 2887 if (__cap - __sz + __n1 >= __n2) 2888 { 2889 if (__libcpp_is_constant_evaluated()) { 2890 __grow_by_and_replace(__cap, 0, __sz, __pos, __n1, __n2, __s); 2891 return *this; 2892 } 2893 value_type* __p = std::__to_address(__get_pointer()); 2894 if (__n1 != __n2) 2895 { 2896 size_type __n_move = __sz - __pos - __n1; 2897 if (__n_move != 0) 2898 { 2899 if (__n1 > __n2) 2900 { 2901 traits_type::move(__p + __pos, __s, __n2); 2902 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2903 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 2904 } 2905 if (__p + __pos < __s && __s < __p + __sz) 2906 { 2907 if (__p + __pos + __n1 <= __s) 2908 __s += __n2 - __n1; 2909 else // __p + __pos < __s < __p + __pos + __n1 2910 { 2911 traits_type::move(__p + __pos, __s, __n1); 2912 __pos += __n1; 2913 __s += __n2; 2914 __n2 -= __n1; 2915 __n1 = 0; 2916 } 2917 } 2918 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2919 } 2920 } 2921 traits_type::move(__p + __pos, __s, __n2); 2922 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 2923 } 2924 else 2925 __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); 2926 return *this; 2927} 2928 2929template <class _CharT, class _Traits, class _Allocator> 2930_LIBCPP_CONSTEXPR_SINCE_CXX20 2931basic_string<_CharT, _Traits, _Allocator>& 2932basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) 2933{ 2934 size_type __sz = size(); 2935 if (__pos > __sz) 2936 __throw_out_of_range(); 2937 __n1 = std::min(__n1, __sz - __pos); 2938 size_type __cap = capacity(); 2939 value_type* __p; 2940 if (__cap - __sz + __n1 >= __n2) 2941 { 2942 __p = std::__to_address(__get_pointer()); 2943 if (__n1 != __n2) 2944 { 2945 size_type __n_move = __sz - __pos - __n1; 2946 if (__n_move != 0) 2947 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2948 } 2949 } 2950 else 2951 { 2952 __grow_by(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); 2953 __p = std::__to_address(__get_long_pointer()); 2954 } 2955 traits_type::assign(__p + __pos, __n2, __c); 2956 return __null_terminate_at(__p, __sz - (__n1 - __n2)); 2957} 2958 2959template <class _CharT, class _Traits, class _Allocator> 2960template<class _InputIterator, __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value, int> > 2961_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2962basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, 2963 _InputIterator __j1, _InputIterator __j2) 2964{ 2965 const basic_string __temp(__j1, __j2, __alloc()); 2966 return replace(__i1, __i2, __temp); 2967} 2968 2969template <class _CharT, class _Traits, class _Allocator> 2970_LIBCPP_CONSTEXPR_SINCE_CXX20 2971basic_string<_CharT, _Traits, _Allocator>& 2972basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str, 2973 size_type __pos2, size_type __n2) 2974{ 2975 size_type __str_sz = __str.size(); 2976 if (__pos2 > __str_sz) 2977 __throw_out_of_range(); 2978 return replace(__pos1, __n1, __str.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 2979} 2980 2981template <class _CharT, class _Traits, class _Allocator> 2982template <class _Tp, 2983 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 2984 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2985 int> > 2986_LIBCPP_CONSTEXPR_SINCE_CXX20 basic_string<_CharT, _Traits, _Allocator>& 2987basic_string<_CharT, _Traits, _Allocator>::replace( 2988 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) { 2989 __self_view __sv = __t; 2990 size_type __str_sz = __sv.size(); 2991 if (__pos2 > __str_sz) 2992 __throw_out_of_range(); 2993 return replace(__pos1, __n1, __sv.data() + __pos2, std::min(__n2, __str_sz - __pos2)); 2994} 2995 2996template <class _CharT, class _Traits, class _Allocator> 2997_LIBCPP_CONSTEXPR_SINCE_CXX20 2998basic_string<_CharT, _Traits, _Allocator>& 2999basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) 3000{ 3001 _LIBCPP_ASSERT(__s != nullptr, "string::replace received nullptr"); 3002 return replace(__pos, __n1, __s, traits_type::length(__s)); 3003} 3004 3005// erase 3006 3007// 'externally instantiated' erase() implementation, called when __n != npos. 3008// Does not check __pos against size() 3009template <class _CharT, class _Traits, class _Allocator> 3010_LIBCPP_CONSTEXPR_SINCE_CXX20 3011void 3012basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move( 3013 size_type __pos, size_type __n) 3014{ 3015 if (__n) 3016 { 3017 size_type __sz = size(); 3018 value_type* __p = std::__to_address(__get_pointer()); 3019 __n = std::min(__n, __sz - __pos); 3020 size_type __n_move = __sz - __pos - __n; 3021 if (__n_move != 0) 3022 traits_type::move(__p + __pos, __p + __pos + __n, __n_move); 3023 __null_terminate_at(__p, __sz - __n); 3024 } 3025} 3026 3027template <class _CharT, class _Traits, class _Allocator> 3028_LIBCPP_CONSTEXPR_SINCE_CXX20 3029basic_string<_CharT, _Traits, _Allocator>& 3030basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, 3031 size_type __n) { 3032 if (__pos > size()) 3033 __throw_out_of_range(); 3034 if (__n == npos) { 3035 __erase_to_end(__pos); 3036 } else { 3037 __erase_external_with_move(__pos, __n); 3038 } 3039 return *this; 3040} 3041 3042template <class _CharT, class _Traits, class _Allocator> 3043inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3044typename basic_string<_CharT, _Traits, _Allocator>::iterator 3045basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) 3046{ 3047 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 3048 "string::erase(iterator) called with an iterator not" 3049 " referring to this string"); 3050 3051 _LIBCPP_ASSERT(__pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); 3052 iterator __b = begin(); 3053 size_type __r = static_cast<size_type>(__pos - __b); 3054 erase(__r, 1); 3055 return __b + static_cast<difference_type>(__r); 3056} 3057 3058template <class _CharT, class _Traits, class _Allocator> 3059inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3060typename basic_string<_CharT, _Traits, _Allocator>::iterator 3061basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) 3062{ 3063 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this, 3064 "string::erase(iterator, iterator) called with an iterator not" 3065 " referring to this string"); 3066 3067 _LIBCPP_ASSERT(__first <= __last, "string::erase(first, last) called with invalid range"); 3068 iterator __b = begin(); 3069 size_type __r = static_cast<size_type>(__first - __b); 3070 erase(__r, static_cast<size_type>(__last - __first)); 3071 return __b + static_cast<difference_type>(__r); 3072} 3073 3074template <class _CharT, class _Traits, class _Allocator> 3075inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3076void 3077basic_string<_CharT, _Traits, _Allocator>::pop_back() 3078{ 3079 _LIBCPP_ASSERT(!empty(), "string::pop_back(): string is already empty"); 3080 __erase_to_end(size() - 1); 3081} 3082 3083template <class _CharT, class _Traits, class _Allocator> 3084inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3085void 3086basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT 3087{ 3088 std::__debug_db_invalidate_all(this); 3089 if (__is_long()) 3090 { 3091 traits_type::assign(*__get_long_pointer(), value_type()); 3092 __set_long_size(0); 3093 } 3094 else 3095 { 3096 traits_type::assign(*__get_short_pointer(), value_type()); 3097 __set_short_size(0); 3098 } 3099} 3100 3101template <class _CharT, class _Traits, class _Allocator> 3102_LIBCPP_CONSTEXPR_SINCE_CXX20 3103void 3104basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) 3105{ 3106 size_type __sz = size(); 3107 if (__n > __sz) 3108 append(__n - __sz, __c); 3109 else 3110 __erase_to_end(__n); 3111} 3112 3113template <class _CharT, class _Traits, class _Allocator> 3114_LIBCPP_CONSTEXPR_SINCE_CXX20 inline void 3115basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) 3116{ 3117 size_type __sz = size(); 3118 if (__n > __sz) { 3119 __append_default_init(__n - __sz); 3120 } else 3121 __erase_to_end(__n); 3122} 3123 3124template <class _CharT, class _Traits, class _Allocator> 3125_LIBCPP_CONSTEXPR_SINCE_CXX20 3126void 3127basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacity) 3128{ 3129 if (__requested_capacity > max_size()) 3130 __throw_length_error(); 3131 3132 // Make sure reserve(n) never shrinks. This is technically only required in C++20 3133 // and later (since P0966R1), however we provide consistent behavior in all Standard 3134 // modes because this function is instantiated in the shared library. 3135 if (__requested_capacity <= capacity()) 3136 return; 3137 3138 size_type __target_capacity = std::max(__requested_capacity, size()); 3139 __target_capacity = __recommend(__target_capacity); 3140 if (__target_capacity == capacity()) return; 3141 3142 __shrink_or_extend(__target_capacity); 3143} 3144 3145template <class _CharT, class _Traits, class _Allocator> 3146inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3147void 3148basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT 3149{ 3150 size_type __target_capacity = __recommend(size()); 3151 if (__target_capacity == capacity()) return; 3152 3153 __shrink_or_extend(__target_capacity); 3154} 3155 3156template <class _CharT, class _Traits, class _Allocator> 3157inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3158void 3159basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) 3160{ 3161 size_type __cap = capacity(); 3162 size_type __sz = size(); 3163 3164 pointer __new_data, __p; 3165 bool __was_long, __now_long; 3166 if (__fits_in_sso(__target_capacity)) 3167 { 3168 __was_long = true; 3169 __now_long = false; 3170 __new_data = __get_short_pointer(); 3171 __p = __get_long_pointer(); 3172 } 3173 else 3174 { 3175 if (__target_capacity > __cap) { 3176 auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); 3177 __new_data = __allocation.ptr; 3178 __target_capacity = __allocation.count - 1; 3179 } 3180 else 3181 { 3182 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS 3183 try 3184 { 3185 #endif // _LIBCPP_HAS_NO_EXCEPTIONS 3186 auto __allocation = std::__allocate_at_least(__alloc(), __target_capacity + 1); 3187 __new_data = __allocation.ptr; 3188 __target_capacity = __allocation.count - 1; 3189 #ifndef _LIBCPP_HAS_NO_EXCEPTIONS 3190 } 3191 catch (...) 3192 { 3193 return; 3194 } 3195 #else // _LIBCPP_HAS_NO_EXCEPTIONS 3196 if (__new_data == nullptr) 3197 return; 3198 #endif // _LIBCPP_HAS_NO_EXCEPTIONS 3199 } 3200 __begin_lifetime(__new_data, __target_capacity + 1); 3201 __now_long = true; 3202 __was_long = __is_long(); 3203 __p = __get_pointer(); 3204 } 3205 traits_type::copy(std::__to_address(__new_data), 3206 std::__to_address(__p), size()+1); 3207 if (__was_long) 3208 __alloc_traits::deallocate(__alloc(), __p, __cap+1); 3209 if (__now_long) 3210 { 3211 __set_long_cap(__target_capacity+1); 3212 __set_long_size(__sz); 3213 __set_long_pointer(__new_data); 3214 } 3215 else 3216 __set_short_size(__sz); 3217 std::__debug_db_invalidate_all(this); 3218} 3219 3220template <class _CharT, class _Traits, class _Allocator> 3221_LIBCPP_CONSTEXPR_SINCE_CXX20 3222typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3223basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const 3224{ 3225 if (__n >= size()) 3226 __throw_out_of_range(); 3227 return (*this)[__n]; 3228} 3229 3230template <class _CharT, class _Traits, class _Allocator> 3231_LIBCPP_CONSTEXPR_SINCE_CXX20 3232typename basic_string<_CharT, _Traits, _Allocator>::reference 3233basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) 3234{ 3235 if (__n >= size()) 3236 __throw_out_of_range(); 3237 return (*this)[__n]; 3238} 3239 3240template <class _CharT, class _Traits, class _Allocator> 3241_LIBCPP_CONSTEXPR_SINCE_CXX20 3242typename basic_string<_CharT, _Traits, _Allocator>::size_type 3243basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const 3244{ 3245 size_type __sz = size(); 3246 if (__pos > __sz) 3247 __throw_out_of_range(); 3248 size_type __rlen = std::min(__n, __sz - __pos); 3249 traits_type::copy(__s, data() + __pos, __rlen); 3250 return __rlen; 3251} 3252 3253template <class _CharT, class _Traits, class _Allocator> 3254inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3255void 3256basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) 3257#if _LIBCPP_STD_VER >= 14 3258 _NOEXCEPT 3259#else 3260 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 3261 __is_nothrow_swappable<allocator_type>::value) 3262#endif 3263{ 3264 if (!__is_long()) 3265 std::__debug_db_invalidate_all(this); 3266 if (!__str.__is_long()) 3267 std::__debug_db_invalidate_all(&__str); 3268 std::__debug_db_swap(this, &__str); 3269 3270 _LIBCPP_ASSERT( 3271 __alloc_traits::propagate_on_container_swap::value || 3272 __alloc_traits::is_always_equal::value || 3273 __alloc() == __str.__alloc(), "swapping non-equal allocators"); 3274 std::swap(__r_.first(), __str.__r_.first()); 3275 std::__swap_allocator(__alloc(), __str.__alloc()); 3276} 3277 3278// find 3279 3280template <class _Traits> 3281struct _LIBCPP_HIDDEN __traits_eq 3282{ 3283 typedef typename _Traits::char_type char_type; 3284 _LIBCPP_HIDE_FROM_ABI 3285 bool operator()(const char_type& __x, const char_type& __y) _NOEXCEPT 3286 {return _Traits::eq(__x, __y);} 3287}; 3288 3289template<class _CharT, class _Traits, class _Allocator> 3290_LIBCPP_CONSTEXPR_SINCE_CXX20 3291typename basic_string<_CharT, _Traits, _Allocator>::size_type 3292basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3293 size_type __pos, 3294 size_type __n) const _NOEXCEPT 3295{ 3296 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find(): received nullptr"); 3297 return std::__str_find<value_type, size_type, traits_type, npos> 3298 (data(), size(), __s, __pos, __n); 3299} 3300 3301template<class _CharT, class _Traits, class _Allocator> 3302inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3303typename basic_string<_CharT, _Traits, _Allocator>::size_type 3304basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, 3305 size_type __pos) const _NOEXCEPT 3306{ 3307 return std::__str_find<value_type, size_type, traits_type, npos> 3308 (data(), size(), __str.data(), __pos, __str.size()); 3309} 3310 3311template<class _CharT, class _Traits, class _Allocator> 3312template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3313_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3314basic_string<_CharT, _Traits, _Allocator>::find(const _Tp &__t, 3315 size_type __pos) const _NOEXCEPT 3316{ 3317 __self_view __sv = __t; 3318 return std::__str_find<value_type, size_type, traits_type, npos> 3319 (data(), size(), __sv.data(), __pos, __sv.size()); 3320} 3321 3322template<class _CharT, class _Traits, class _Allocator> 3323inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3324typename basic_string<_CharT, _Traits, _Allocator>::size_type 3325basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3326 size_type __pos) const _NOEXCEPT 3327{ 3328 _LIBCPP_ASSERT(__s != nullptr, "string::find(): received nullptr"); 3329 return std::__str_find<value_type, size_type, traits_type, npos> 3330 (data(), size(), __s, __pos, traits_type::length(__s)); 3331} 3332 3333template<class _CharT, class _Traits, class _Allocator> 3334_LIBCPP_CONSTEXPR_SINCE_CXX20 3335typename basic_string<_CharT, _Traits, _Allocator>::size_type 3336basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, 3337 size_type __pos) const _NOEXCEPT 3338{ 3339 return std::__str_find<value_type, size_type, traits_type, npos> 3340 (data(), size(), __c, __pos); 3341} 3342 3343// rfind 3344 3345template<class _CharT, class _Traits, class _Allocator> 3346_LIBCPP_CONSTEXPR_SINCE_CXX20 3347typename basic_string<_CharT, _Traits, _Allocator>::size_type 3348basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3349 size_type __pos, 3350 size_type __n) const _NOEXCEPT 3351{ 3352 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); 3353 return std::__str_rfind<value_type, size_type, traits_type, npos> 3354 (data(), size(), __s, __pos, __n); 3355} 3356 3357template<class _CharT, class _Traits, class _Allocator> 3358inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3359typename basic_string<_CharT, _Traits, _Allocator>::size_type 3360basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, 3361 size_type __pos) const _NOEXCEPT 3362{ 3363 return std::__str_rfind<value_type, size_type, traits_type, npos> 3364 (data(), size(), __str.data(), __pos, __str.size()); 3365} 3366 3367template<class _CharT, class _Traits, class _Allocator> 3368template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3369_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3370basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, 3371 size_type __pos) const _NOEXCEPT 3372{ 3373 __self_view __sv = __t; 3374 return std::__str_rfind<value_type, size_type, traits_type, npos> 3375 (data(), size(), __sv.data(), __pos, __sv.size()); 3376} 3377 3378template<class _CharT, class _Traits, class _Allocator> 3379inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3380typename basic_string<_CharT, _Traits, _Allocator>::size_type 3381basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3382 size_type __pos) const _NOEXCEPT 3383{ 3384 _LIBCPP_ASSERT(__s != nullptr, "string::rfind(): received nullptr"); 3385 return std::__str_rfind<value_type, size_type, traits_type, npos> 3386 (data(), size(), __s, __pos, traits_type::length(__s)); 3387} 3388 3389template<class _CharT, class _Traits, class _Allocator> 3390_LIBCPP_CONSTEXPR_SINCE_CXX20 3391typename basic_string<_CharT, _Traits, _Allocator>::size_type 3392basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, 3393 size_type __pos) const _NOEXCEPT 3394{ 3395 return std::__str_rfind<value_type, size_type, traits_type, npos> 3396 (data(), size(), __c, __pos); 3397} 3398 3399// find_first_of 3400 3401template<class _CharT, class _Traits, class _Allocator> 3402_LIBCPP_CONSTEXPR_SINCE_CXX20 3403typename basic_string<_CharT, _Traits, _Allocator>::size_type 3404basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3405 size_type __pos, 3406 size_type __n) const _NOEXCEPT 3407{ 3408 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); 3409 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3410 (data(), size(), __s, __pos, __n); 3411} 3412 3413template<class _CharT, class _Traits, class _Allocator> 3414inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3415typename basic_string<_CharT, _Traits, _Allocator>::size_type 3416basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, 3417 size_type __pos) const _NOEXCEPT 3418{ 3419 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3420 (data(), size(), __str.data(), __pos, __str.size()); 3421} 3422 3423template<class _CharT, class _Traits, class _Allocator> 3424template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3425_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3426basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, 3427 size_type __pos) const _NOEXCEPT 3428{ 3429 __self_view __sv = __t; 3430 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3431 (data(), size(), __sv.data(), __pos, __sv.size()); 3432} 3433 3434template<class _CharT, class _Traits, class _Allocator> 3435inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3436typename basic_string<_CharT, _Traits, _Allocator>::size_type 3437basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3438 size_type __pos) const _NOEXCEPT 3439{ 3440 _LIBCPP_ASSERT(__s != nullptr, "string::find_first_of(): received nullptr"); 3441 return std::__str_find_first_of<value_type, size_type, traits_type, npos> 3442 (data(), size(), __s, __pos, traits_type::length(__s)); 3443} 3444 3445template<class _CharT, class _Traits, class _Allocator> 3446inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3447typename basic_string<_CharT, _Traits, _Allocator>::size_type 3448basic_string<_CharT, _Traits, _Allocator>::find_first_of(value_type __c, 3449 size_type __pos) const _NOEXCEPT 3450{ 3451 return find(__c, __pos); 3452} 3453 3454// find_last_of 3455 3456template<class _CharT, class _Traits, class _Allocator> 3457inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3458typename basic_string<_CharT, _Traits, _Allocator>::size_type 3459basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3460 size_type __pos, 3461 size_type __n) const _NOEXCEPT 3462{ 3463 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); 3464 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3465 (data(), size(), __s, __pos, __n); 3466} 3467 3468template<class _CharT, class _Traits, class _Allocator> 3469inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3470typename basic_string<_CharT, _Traits, _Allocator>::size_type 3471basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, 3472 size_type __pos) const _NOEXCEPT 3473{ 3474 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3475 (data(), size(), __str.data(), __pos, __str.size()); 3476} 3477 3478template<class _CharT, class _Traits, class _Allocator> 3479template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3480_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3481basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, 3482 size_type __pos) const _NOEXCEPT 3483{ 3484 __self_view __sv = __t; 3485 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3486 (data(), size(), __sv.data(), __pos, __sv.size()); 3487} 3488 3489template<class _CharT, class _Traits, class _Allocator> 3490inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3491typename basic_string<_CharT, _Traits, _Allocator>::size_type 3492basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3493 size_type __pos) const _NOEXCEPT 3494{ 3495 _LIBCPP_ASSERT(__s != nullptr, "string::find_last_of(): received nullptr"); 3496 return std::__str_find_last_of<value_type, size_type, traits_type, npos> 3497 (data(), size(), __s, __pos, traits_type::length(__s)); 3498} 3499 3500template<class _CharT, class _Traits, class _Allocator> 3501inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3502typename basic_string<_CharT, _Traits, _Allocator>::size_type 3503basic_string<_CharT, _Traits, _Allocator>::find_last_of(value_type __c, 3504 size_type __pos) const _NOEXCEPT 3505{ 3506 return rfind(__c, __pos); 3507} 3508 3509// find_first_not_of 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>::find_first_not_of(const value_type* __s, 3515 size_type __pos, 3516 size_type __n) const _NOEXCEPT 3517{ 3518 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); 3519 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3520 (data(), size(), __s, __pos, __n); 3521} 3522 3523template<class _CharT, class _Traits, class _Allocator> 3524inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3525typename basic_string<_CharT, _Traits, _Allocator>::size_type 3526basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const basic_string& __str, 3527 size_type __pos) const _NOEXCEPT 3528{ 3529 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3530 (data(), size(), __str.data(), __pos, __str.size()); 3531} 3532 3533template<class _CharT, class _Traits, class _Allocator> 3534template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3535_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3536basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, 3537 size_type __pos) const _NOEXCEPT 3538{ 3539 __self_view __sv = __t; 3540 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3541 (data(), size(), __sv.data(), __pos, __sv.size()); 3542} 3543 3544template<class _CharT, class _Traits, class _Allocator> 3545inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3546typename basic_string<_CharT, _Traits, _Allocator>::size_type 3547basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3548 size_type __pos) const _NOEXCEPT 3549{ 3550 _LIBCPP_ASSERT(__s != nullptr, "string::find_first_not_of(): received nullptr"); 3551 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3552 (data(), size(), __s, __pos, traits_type::length(__s)); 3553} 3554 3555template<class _CharT, class _Traits, class _Allocator> 3556inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3557typename basic_string<_CharT, _Traits, _Allocator>::size_type 3558basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(value_type __c, 3559 size_type __pos) const _NOEXCEPT 3560{ 3561 return std::__str_find_first_not_of<value_type, size_type, traits_type, npos> 3562 (data(), size(), __c, __pos); 3563} 3564 3565// find_last_not_of 3566 3567template<class _CharT, class _Traits, class _Allocator> 3568_LIBCPP_CONSTEXPR_SINCE_CXX20 3569typename basic_string<_CharT, _Traits, _Allocator>::size_type 3570basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3571 size_type __pos, 3572 size_type __n) const _NOEXCEPT 3573{ 3574 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); 3575 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3576 (data(), size(), __s, __pos, __n); 3577} 3578 3579template<class _CharT, class _Traits, class _Allocator> 3580inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3581typename basic_string<_CharT, _Traits, _Allocator>::size_type 3582basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const basic_string& __str, 3583 size_type __pos) const _NOEXCEPT 3584{ 3585 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3586 (data(), size(), __str.data(), __pos, __str.size()); 3587} 3588 3589template<class _CharT, class _Traits, class _Allocator> 3590template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3591_LIBCPP_CONSTEXPR_SINCE_CXX20 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3592basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, 3593 size_type __pos) const _NOEXCEPT 3594{ 3595 __self_view __sv = __t; 3596 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3597 (data(), size(), __sv.data(), __pos, __sv.size()); 3598} 3599 3600template<class _CharT, class _Traits, class _Allocator> 3601inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3602typename basic_string<_CharT, _Traits, _Allocator>::size_type 3603basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3604 size_type __pos) const _NOEXCEPT 3605{ 3606 _LIBCPP_ASSERT(__s != nullptr, "string::find_last_not_of(): received nullptr"); 3607 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3608 (data(), size(), __s, __pos, traits_type::length(__s)); 3609} 3610 3611template<class _CharT, class _Traits, class _Allocator> 3612inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3613typename basic_string<_CharT, _Traits, _Allocator>::size_type 3614basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(value_type __c, 3615 size_type __pos) const _NOEXCEPT 3616{ 3617 return std::__str_find_last_not_of<value_type, size_type, traits_type, npos> 3618 (data(), size(), __c, __pos); 3619} 3620 3621// compare 3622 3623template <class _CharT, class _Traits, class _Allocator> 3624template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3625_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3626basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const _NOEXCEPT 3627{ 3628 __self_view __sv = __t; 3629 size_t __lhs_sz = size(); 3630 size_t __rhs_sz = __sv.size(); 3631 int __result = traits_type::compare(data(), __sv.data(), 3632 std::min(__lhs_sz, __rhs_sz)); 3633 if (__result != 0) 3634 return __result; 3635 if (__lhs_sz < __rhs_sz) 3636 return -1; 3637 if (__lhs_sz > __rhs_sz) 3638 return 1; 3639 return 0; 3640} 3641 3642template <class _CharT, class _Traits, class _Allocator> 3643inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3644int 3645basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT 3646{ 3647 return compare(__self_view(__str)); 3648} 3649 3650template <class _CharT, class _Traits, class _Allocator> 3651inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3652int 3653basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3654 size_type __n1, 3655 const value_type* __s, 3656 size_type __n2) const 3657{ 3658 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); 3659 size_type __sz = size(); 3660 if (__pos1 > __sz || __n2 == npos) 3661 __throw_out_of_range(); 3662 size_type __rlen = std::min(__n1, __sz - __pos1); 3663 int __r = traits_type::compare(data() + __pos1, __s, std::min(__rlen, __n2)); 3664 if (__r == 0) 3665 { 3666 if (__rlen < __n2) 3667 __r = -1; 3668 else if (__rlen > __n2) 3669 __r = 1; 3670 } 3671 return __r; 3672} 3673 3674template <class _CharT, class _Traits, class _Allocator> 3675template <class _Tp, __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, int> > 3676_LIBCPP_CONSTEXPR_SINCE_CXX20 int 3677basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3678 size_type __n1, 3679 const _Tp& __t) const 3680{ 3681 __self_view __sv = __t; 3682 return compare(__pos1, __n1, __sv.data(), __sv.size()); 3683} 3684 3685template <class _CharT, class _Traits, class _Allocator> 3686inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3687int 3688basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3689 size_type __n1, 3690 const basic_string& __str) const 3691{ 3692 return compare(__pos1, __n1, __str.data(), __str.size()); 3693} 3694 3695template <class _CharT, class _Traits, class _Allocator> 3696template <class _Tp, 3697 __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 3698 !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3699 int> > 3700_LIBCPP_CONSTEXPR_SINCE_CXX20 int basic_string<_CharT, _Traits, _Allocator>::compare( 3701 size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2) const { 3702 __self_view __sv = __t; 3703 return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 3704} 3705 3706template <class _CharT, class _Traits, class _Allocator> 3707_LIBCPP_CONSTEXPR_SINCE_CXX20 3708int 3709basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3710 size_type __n1, 3711 const basic_string& __str, 3712 size_type __pos2, 3713 size_type __n2) const 3714{ 3715 return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); 3716} 3717 3718template <class _CharT, class _Traits, class _Allocator> 3719_LIBCPP_CONSTEXPR_SINCE_CXX20 3720int 3721basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT 3722{ 3723 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3724 return compare(0, npos, __s, traits_type::length(__s)); 3725} 3726 3727template <class _CharT, class _Traits, class _Allocator> 3728_LIBCPP_CONSTEXPR_SINCE_CXX20 3729int 3730basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3731 size_type __n1, 3732 const value_type* __s) const 3733{ 3734 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3735 return compare(__pos1, __n1, __s, traits_type::length(__s)); 3736} 3737 3738// __invariants 3739 3740template<class _CharT, class _Traits, class _Allocator> 3741inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3742bool 3743basic_string<_CharT, _Traits, _Allocator>::__invariants() const 3744{ 3745 if (size() > capacity()) 3746 return false; 3747 if (capacity() < __min_cap - 1) 3748 return false; 3749 if (data() == nullptr) 3750 return false; 3751 if (!_Traits::eq(data()[size()], value_type())) 3752 return false; 3753 return true; 3754} 3755 3756// __clear_and_shrink 3757 3758template<class _CharT, class _Traits, class _Allocator> 3759inline _LIBCPP_CONSTEXPR_SINCE_CXX20 3760void 3761basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT 3762{ 3763 clear(); 3764 if(__is_long()) 3765 { 3766 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1); 3767 __default_init(); 3768 } 3769} 3770 3771// operator== 3772 3773template<class _CharT, class _Traits, class _Allocator> 3774inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 3775bool 3776operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3777 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3778{ 3779#if _LIBCPP_STD_VER >= 20 3780 return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); 3781#else 3782 size_t __lhs_sz = __lhs.size(); 3783 return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), 3784 __rhs.data(), 3785 __lhs_sz) == 0; 3786#endif 3787} 3788 3789template<class _Allocator> 3790inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 3791bool 3792operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, 3793 const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT 3794{ 3795 size_t __lhs_sz = __lhs.size(); 3796 if (__lhs_sz != __rhs.size()) 3797 return false; 3798 const char* __lp = __lhs.data(); 3799 const char* __rp = __rhs.data(); 3800 if (__lhs.__is_long()) 3801 return char_traits<char>::compare(__lp, __rp, __lhs_sz) == 0; 3802 for (; __lhs_sz != 0; --__lhs_sz, ++__lp, ++__rp) 3803 if (*__lp != *__rp) 3804 return false; 3805 return true; 3806} 3807 3808#if _LIBCPP_STD_VER <= 17 3809template<class _CharT, class _Traits, class _Allocator> 3810inline _LIBCPP_HIDE_FROM_ABI 3811bool 3812operator==(const _CharT* __lhs, 3813 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3814{ 3815 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3816 _LIBCPP_ASSERT(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); 3817 size_t __lhs_len = _Traits::length(__lhs); 3818 if (__lhs_len != __rhs.size()) return false; 3819 return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; 3820} 3821#endif // _LIBCPP_STD_VER <= 17 3822 3823template<class _CharT, class _Traits, class _Allocator> 3824inline _LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI 3825bool 3826operator==(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 3827 const _CharT* __rhs) _NOEXCEPT 3828{ 3829#if _LIBCPP_STD_VER >= 20 3830 return basic_string_view<_CharT, _Traits>(__lhs) == basic_string_view<_CharT, _Traits>(__rhs); 3831#else 3832 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3833 _LIBCPP_ASSERT(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); 3834 size_t __rhs_len = _Traits::length(__rhs); 3835 if (__rhs_len != __lhs.size()) return false; 3836 return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; 3837#endif 3838} 3839 3840#if _LIBCPP_STD_VER >= 20 3841 3842template <class _CharT, class _Traits, class _Allocator> 3843_LIBCPP_HIDE_FROM_ABI constexpr auto operator<=>( 3844 const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3845 const basic_string<_CharT, _Traits, _Allocator>& __rhs) noexcept { 3846 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 3847} 3848 3849template <class _CharT, class _Traits, class _Allocator> 3850_LIBCPP_HIDE_FROM_ABI constexpr auto 3851operator<=>(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) { 3852 return basic_string_view<_CharT, _Traits>(__lhs) <=> basic_string_view<_CharT, _Traits>(__rhs); 3853} 3854 3855#else // _LIBCPP_STD_VER >= 20 3856 3857template<class _CharT, class _Traits, class _Allocator> 3858inline _LIBCPP_HIDE_FROM_ABI 3859bool 3860operator!=(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 3861 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3862{ 3863 return !(__lhs == __rhs); 3864} 3865 3866template<class _CharT, class _Traits, class _Allocator> 3867inline _LIBCPP_HIDE_FROM_ABI 3868bool 3869operator!=(const _CharT* __lhs, 3870 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3871{ 3872 return !(__lhs == __rhs); 3873} 3874 3875template<class _CharT, class _Traits, class _Allocator> 3876inline _LIBCPP_HIDE_FROM_ABI 3877bool 3878operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3879 const _CharT* __rhs) _NOEXCEPT 3880{ 3881 return !(__lhs == __rhs); 3882} 3883 3884// operator< 3885 3886template<class _CharT, class _Traits, class _Allocator> 3887inline _LIBCPP_HIDE_FROM_ABI 3888bool 3889operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3890 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3891{ 3892 return __lhs.compare(__rhs) < 0; 3893} 3894 3895template<class _CharT, class _Traits, class _Allocator> 3896inline _LIBCPP_HIDE_FROM_ABI 3897bool 3898operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3899 const _CharT* __rhs) _NOEXCEPT 3900{ 3901 return __lhs.compare(__rhs) < 0; 3902} 3903 3904template<class _CharT, class _Traits, class _Allocator> 3905inline _LIBCPP_HIDE_FROM_ABI 3906bool 3907operator< (const _CharT* __lhs, 3908 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3909{ 3910 return __rhs.compare(__lhs) > 0; 3911} 3912 3913// operator> 3914 3915template<class _CharT, class _Traits, class _Allocator> 3916inline _LIBCPP_HIDE_FROM_ABI 3917bool 3918operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3919 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3920{ 3921 return __rhs < __lhs; 3922} 3923 3924template<class _CharT, class _Traits, class _Allocator> 3925inline _LIBCPP_HIDE_FROM_ABI 3926bool 3927operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3928 const _CharT* __rhs) _NOEXCEPT 3929{ 3930 return __rhs < __lhs; 3931} 3932 3933template<class _CharT, class _Traits, class _Allocator> 3934inline _LIBCPP_HIDE_FROM_ABI 3935bool 3936operator> (const _CharT* __lhs, 3937 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3938{ 3939 return __rhs < __lhs; 3940} 3941 3942// operator<= 3943 3944template<class _CharT, class _Traits, class _Allocator> 3945inline _LIBCPP_HIDE_FROM_ABI 3946bool 3947operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3948 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3949{ 3950 return !(__rhs < __lhs); 3951} 3952 3953template<class _CharT, class _Traits, class _Allocator> 3954inline _LIBCPP_HIDE_FROM_ABI 3955bool 3956operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3957 const _CharT* __rhs) _NOEXCEPT 3958{ 3959 return !(__rhs < __lhs); 3960} 3961 3962template<class _CharT, class _Traits, class _Allocator> 3963inline _LIBCPP_HIDE_FROM_ABI 3964bool 3965operator<=(const _CharT* __lhs, 3966 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3967{ 3968 return !(__rhs < __lhs); 3969} 3970 3971// operator>= 3972 3973template<class _CharT, class _Traits, class _Allocator> 3974inline _LIBCPP_HIDE_FROM_ABI 3975bool 3976operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3977 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3978{ 3979 return !(__lhs < __rhs); 3980} 3981 3982template<class _CharT, class _Traits, class _Allocator> 3983inline _LIBCPP_HIDE_FROM_ABI 3984bool 3985operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3986 const _CharT* __rhs) _NOEXCEPT 3987{ 3988 return !(__lhs < __rhs); 3989} 3990 3991template<class _CharT, class _Traits, class _Allocator> 3992inline _LIBCPP_HIDE_FROM_ABI 3993bool 3994operator>=(const _CharT* __lhs, 3995 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3996{ 3997 return !(__lhs < __rhs); 3998} 3999#endif // _LIBCPP_STD_VER >= 20 4000 4001// operator + 4002 4003template<class _CharT, class _Traits, class _Allocator> 4004_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4005basic_string<_CharT, _Traits, _Allocator> 4006operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4007 const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4008{ 4009 using _String = basic_string<_CharT, _Traits, _Allocator>; 4010 auto __lhs_sz = __lhs.size(); 4011 auto __rhs_sz = __rhs.size(); 4012 _String __r(__uninitialized_size_tag(), 4013 __lhs_sz + __rhs_sz, 4014 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4015 auto __ptr = std::__to_address(__r.__get_pointer()); 4016 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4017 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4018 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4019 return __r; 4020} 4021 4022template<class _CharT, class _Traits, class _Allocator> 4023_LIBCPP_HIDDEN _LIBCPP_CONSTEXPR_SINCE_CXX20 4024basic_string<_CharT, _Traits, _Allocator> 4025operator+(const _CharT* __lhs , const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4026{ 4027 using _String = basic_string<_CharT, _Traits, _Allocator>; 4028 auto __lhs_sz = _Traits::length(__lhs); 4029 auto __rhs_sz = __rhs.size(); 4030 _String __r(__uninitialized_size_tag(), 4031 __lhs_sz + __rhs_sz, 4032 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4033 auto __ptr = std::__to_address(__r.__get_pointer()); 4034 _Traits::copy(__ptr, __lhs, __lhs_sz); 4035 _Traits::copy(__ptr + __lhs_sz, __rhs.data(), __rhs_sz); 4036 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4037 return __r; 4038} 4039 4040template<class _CharT, class _Traits, class _Allocator> 4041_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4042basic_string<_CharT, _Traits, _Allocator> 4043operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4044{ 4045 using _String = basic_string<_CharT, _Traits, _Allocator>; 4046 typename _String::size_type __rhs_sz = __rhs.size(); 4047 _String __r(__uninitialized_size_tag(), 4048 __rhs_sz + 1, 4049 _String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4050 auto __ptr = std::__to_address(__r.__get_pointer()); 4051 _Traits::assign(__ptr, 1, __lhs); 4052 _Traits::copy(__ptr + 1, __rhs.data(), __rhs_sz); 4053 _Traits::assign(__ptr + 1 + __rhs_sz, 1, _CharT()); 4054 return __r; 4055} 4056 4057template<class _CharT, class _Traits, class _Allocator> 4058inline _LIBCPP_CONSTEXPR_SINCE_CXX20 4059basic_string<_CharT, _Traits, _Allocator> 4060operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) 4061{ 4062 using _String = basic_string<_CharT, _Traits, _Allocator>; 4063 typename _String::size_type __lhs_sz = __lhs.size(); 4064 typename _String::size_type __rhs_sz = _Traits::length(__rhs); 4065 _String __r(__uninitialized_size_tag(), 4066 __lhs_sz + __rhs_sz, 4067 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4068 auto __ptr = std::__to_address(__r.__get_pointer()); 4069 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4070 _Traits::copy(__ptr + __lhs_sz, __rhs, __rhs_sz); 4071 _Traits::assign(__ptr + __lhs_sz + __rhs_sz, 1, _CharT()); 4072 return __r; 4073} 4074 4075template<class _CharT, class _Traits, class _Allocator> 4076_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4077basic_string<_CharT, _Traits, _Allocator> 4078operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) 4079{ 4080 using _String = basic_string<_CharT, _Traits, _Allocator>; 4081 typename _String::size_type __lhs_sz = __lhs.size(); 4082 _String __r(__uninitialized_size_tag(), 4083 __lhs_sz + 1, 4084 _String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4085 auto __ptr = std::__to_address(__r.__get_pointer()); 4086 _Traits::copy(__ptr, __lhs.data(), __lhs_sz); 4087 _Traits::assign(__ptr + __lhs_sz, 1, __rhs); 4088 _Traits::assign(__ptr + 1 + __lhs_sz, 1, _CharT()); 4089 return __r; 4090} 4091 4092#ifndef _LIBCPP_CXX03_LANG 4093 4094template<class _CharT, class _Traits, class _Allocator> 4095inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4096basic_string<_CharT, _Traits, _Allocator> 4097operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4098{ 4099 return std::move(__lhs.append(__rhs)); 4100} 4101 4102template<class _CharT, class _Traits, class _Allocator> 4103inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4104basic_string<_CharT, _Traits, _Allocator> 4105operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4106{ 4107 return std::move(__rhs.insert(0, __lhs)); 4108} 4109 4110template<class _CharT, class _Traits, class _Allocator> 4111inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4112basic_string<_CharT, _Traits, _Allocator> 4113operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4114{ 4115 return std::move(__lhs.append(__rhs)); 4116} 4117 4118template<class _CharT, class _Traits, class _Allocator> 4119inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4120basic_string<_CharT, _Traits, _Allocator> 4121operator+(const _CharT* __lhs , basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4122{ 4123 return std::move(__rhs.insert(0, __lhs)); 4124} 4125 4126template<class _CharT, class _Traits, class _Allocator> 4127inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4128basic_string<_CharT, _Traits, _Allocator> 4129operator+(_CharT __lhs, basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4130{ 4131 __rhs.insert(__rhs.begin(), __lhs); 4132 return std::move(__rhs); 4133} 4134 4135template<class _CharT, class _Traits, class _Allocator> 4136inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4137basic_string<_CharT, _Traits, _Allocator> 4138operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) 4139{ 4140 return std::move(__lhs.append(__rhs)); 4141} 4142 4143template<class _CharT, class _Traits, class _Allocator> 4144inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4145basic_string<_CharT, _Traits, _Allocator> 4146operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) 4147{ 4148 __lhs.push_back(__rhs); 4149 return std::move(__lhs); 4150} 4151 4152#endif // _LIBCPP_CXX03_LANG 4153 4154// swap 4155 4156template<class _CharT, class _Traits, class _Allocator> 4157inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4158void 4159swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, 4160 basic_string<_CharT, _Traits, _Allocator>& __rhs) 4161 _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) 4162{ 4163 __lhs.swap(__rhs); 4164} 4165 4166_LIBCPP_FUNC_VIS int stoi (const string& __str, size_t* __idx = nullptr, int __base = 10); 4167_LIBCPP_FUNC_VIS long stol (const string& __str, size_t* __idx = nullptr, int __base = 10); 4168_LIBCPP_FUNC_VIS unsigned long stoul (const string& __str, size_t* __idx = nullptr, int __base = 10); 4169_LIBCPP_FUNC_VIS long long stoll (const string& __str, size_t* __idx = nullptr, int __base = 10); 4170_LIBCPP_FUNC_VIS unsigned long long stoull(const string& __str, size_t* __idx = nullptr, int __base = 10); 4171 4172_LIBCPP_FUNC_VIS float stof (const string& __str, size_t* __idx = nullptr); 4173_LIBCPP_FUNC_VIS double stod (const string& __str, size_t* __idx = nullptr); 4174_LIBCPP_FUNC_VIS long double stold(const string& __str, size_t* __idx = nullptr); 4175 4176_LIBCPP_FUNC_VIS string to_string(int __val); 4177_LIBCPP_FUNC_VIS string to_string(unsigned __val); 4178_LIBCPP_FUNC_VIS string to_string(long __val); 4179_LIBCPP_FUNC_VIS string to_string(unsigned long __val); 4180_LIBCPP_FUNC_VIS string to_string(long long __val); 4181_LIBCPP_FUNC_VIS string to_string(unsigned long long __val); 4182_LIBCPP_FUNC_VIS string to_string(float __val); 4183_LIBCPP_FUNC_VIS string to_string(double __val); 4184_LIBCPP_FUNC_VIS string to_string(long double __val); 4185 4186#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4187_LIBCPP_FUNC_VIS int stoi (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4188_LIBCPP_FUNC_VIS long stol (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4189_LIBCPP_FUNC_VIS unsigned long stoul (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4190_LIBCPP_FUNC_VIS long long stoll (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4191_LIBCPP_FUNC_VIS unsigned long long stoull(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4192 4193_LIBCPP_FUNC_VIS float stof (const wstring& __str, size_t* __idx = nullptr); 4194_LIBCPP_FUNC_VIS double stod (const wstring& __str, size_t* __idx = nullptr); 4195_LIBCPP_FUNC_VIS long double stold(const wstring& __str, size_t* __idx = nullptr); 4196 4197_LIBCPP_FUNC_VIS wstring to_wstring(int __val); 4198_LIBCPP_FUNC_VIS wstring to_wstring(unsigned __val); 4199_LIBCPP_FUNC_VIS wstring to_wstring(long __val); 4200_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long __val); 4201_LIBCPP_FUNC_VIS wstring to_wstring(long long __val); 4202_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long long __val); 4203_LIBCPP_FUNC_VIS wstring to_wstring(float __val); 4204_LIBCPP_FUNC_VIS wstring to_wstring(double __val); 4205_LIBCPP_FUNC_VIS wstring to_wstring(long double __val); 4206#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS 4207 4208template<class _CharT, class _Traits, class _Allocator> 4209_LIBCPP_TEMPLATE_DATA_VIS 4210const typename basic_string<_CharT, _Traits, _Allocator>::size_type 4211 basic_string<_CharT, _Traits, _Allocator>::npos; 4212 4213template <class _CharT, class _Allocator> 4214struct __string_hash : public __unary_function<basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> { 4215 _LIBCPP_HIDE_FROM_ABI size_t 4216 operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT { 4217 return std::__do_string_hash(__val.data(), __val.data() + __val.size()); 4218 } 4219}; 4220 4221template <class _Allocator> 4222struct hash<basic_string<char, char_traits<char>, _Allocator> > : __string_hash<char, _Allocator> {}; 4223 4224#ifndef _LIBCPP_HAS_NO_CHAR8_T 4225template <class _Allocator> 4226struct hash<basic_string<char8_t, char_traits<char8_t>, _Allocator> > : __string_hash<char8_t, _Allocator> {}; 4227#endif 4228 4229template <class _Allocator> 4230struct hash<basic_string<char16_t, char_traits<char16_t>, _Allocator> > : __string_hash<char16_t, _Allocator> {}; 4231 4232template <class _Allocator> 4233struct hash<basic_string<char32_t, char_traits<char32_t>, _Allocator> > : __string_hash<char32_t, _Allocator> {}; 4234 4235#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4236template <class _Allocator> 4237struct hash<basic_string<wchar_t, char_traits<wchar_t>, _Allocator> > : __string_hash<wchar_t, _Allocator> {}; 4238#endif 4239 4240template<class _CharT, class _Traits, class _Allocator> 4241_LIBCPP_HIDE_FROM_ABI basic_ostream<_CharT, _Traits>& 4242operator<<(basic_ostream<_CharT, _Traits>& __os, 4243 const basic_string<_CharT, _Traits, _Allocator>& __str); 4244 4245template<class _CharT, class _Traits, class _Allocator> 4246_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4247operator>>(basic_istream<_CharT, _Traits>& __is, 4248 basic_string<_CharT, _Traits, _Allocator>& __str); 4249 4250template<class _CharT, class _Traits, class _Allocator> 4251_LIBCPP_HIDE_FROM_ABI basic_istream<_CharT, _Traits>& 4252getline(basic_istream<_CharT, _Traits>& __is, 4253 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4254 4255template<class _CharT, class _Traits, class _Allocator> 4256inline _LIBCPP_HIDE_FROM_ABI 4257basic_istream<_CharT, _Traits>& 4258getline(basic_istream<_CharT, _Traits>& __is, 4259 basic_string<_CharT, _Traits, _Allocator>& __str); 4260 4261template<class _CharT, class _Traits, class _Allocator> 4262inline _LIBCPP_HIDE_FROM_ABI 4263basic_istream<_CharT, _Traits>& 4264getline(basic_istream<_CharT, _Traits>&& __is, 4265 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4266 4267template<class _CharT, class _Traits, class _Allocator> 4268inline _LIBCPP_HIDE_FROM_ABI 4269basic_istream<_CharT, _Traits>& 4270getline(basic_istream<_CharT, _Traits>&& __is, 4271 basic_string<_CharT, _Traits, _Allocator>& __str); 4272 4273#if _LIBCPP_STD_VER >= 20 4274template <class _CharT, class _Traits, class _Allocator, class _Up> 4275inline _LIBCPP_HIDE_FROM_ABI 4276 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4277 erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { 4278 auto __old_size = __str.size(); 4279 __str.erase(std::remove(__str.begin(), __str.end(), __v), __str.end()); 4280 return __old_size - __str.size(); 4281} 4282 4283template <class _CharT, class _Traits, class _Allocator, class _Predicate> 4284inline _LIBCPP_HIDE_FROM_ABI 4285 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4286 erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, 4287 _Predicate __pred) { 4288 auto __old_size = __str.size(); 4289 __str.erase(std::remove_if(__str.begin(), __str.end(), __pred), 4290 __str.end()); 4291 return __old_size - __str.size(); 4292} 4293#endif 4294 4295#ifdef _LIBCPP_ENABLE_DEBUG_MODE 4296 4297template<class _CharT, class _Traits, class _Allocator> 4298bool 4299basic_string<_CharT, _Traits, _Allocator>::__dereferenceable(const const_iterator* __i) const 4300{ 4301 return data() <= std::__to_address(__i->base()) && 4302 std::__to_address(__i->base()) < data() + size(); 4303} 4304 4305template<class _CharT, class _Traits, class _Allocator> 4306bool 4307basic_string<_CharT, _Traits, _Allocator>::__decrementable(const const_iterator* __i) const 4308{ 4309 return data() < std::__to_address(__i->base()) && 4310 std::__to_address(__i->base()) <= data() + size(); 4311} 4312 4313template<class _CharT, class _Traits, class _Allocator> 4314bool 4315basic_string<_CharT, _Traits, _Allocator>::__addable(const const_iterator* __i, ptrdiff_t __n) const 4316{ 4317 const value_type* __p = std::__to_address(__i->base()) + __n; 4318 return data() <= __p && __p <= data() + size(); 4319} 4320 4321template<class _CharT, class _Traits, class _Allocator> 4322bool 4323basic_string<_CharT, _Traits, _Allocator>::__subscriptable(const const_iterator* __i, ptrdiff_t __n) const 4324{ 4325 const value_type* __p = std::__to_address(__i->base()) + __n; 4326 return data() <= __p && __p < data() + size(); 4327} 4328 4329#endif // _LIBCPP_ENABLE_DEBUG_MODE 4330 4331#if _LIBCPP_STD_VER >= 14 4332// Literal suffixes for basic_string [basic.string.literals] 4333inline namespace literals 4334{ 4335 inline namespace string_literals 4336 { 4337 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4338 basic_string<char> operator "" s( const char *__str, size_t __len ) 4339 { 4340 return basic_string<char> (__str, __len); 4341 } 4342 4343#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4344 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4345 basic_string<wchar_t> operator "" s( const wchar_t *__str, size_t __len ) 4346 { 4347 return basic_string<wchar_t> (__str, __len); 4348 } 4349#endif 4350 4351#ifndef _LIBCPP_HAS_NO_CHAR8_T 4352 inline _LIBCPP_HIDE_FROM_ABI constexpr 4353 basic_string<char8_t> operator "" s(const char8_t *__str, size_t __len) 4354 { 4355 return basic_string<char8_t> (__str, __len); 4356 } 4357#endif 4358 4359 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4360 basic_string<char16_t> operator "" s( const char16_t *__str, size_t __len ) 4361 { 4362 return basic_string<char16_t> (__str, __len); 4363 } 4364 4365 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 4366 basic_string<char32_t> operator "" s( const char32_t *__str, size_t __len ) 4367 { 4368 return basic_string<char32_t> (__str, __len); 4369 } 4370 } // namespace string_literals 4371} // namespace literals 4372 4373#if _LIBCPP_STD_VER >= 20 4374template <> 4375inline constexpr bool __format::__enable_insertable<std::basic_string<char>> = true; 4376#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4377template <> 4378inline constexpr bool __format::__enable_insertable<std::basic_string<wchar_t>> = true; 4379#endif 4380#endif 4381 4382#endif 4383 4384_LIBCPP_END_NAMESPACE_STD 4385 4386_LIBCPP_POP_MACROS 4387 4388#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 4389# include <algorithm> 4390# include <concepts> 4391# include <cstdlib> 4392# include <functional> 4393# include <iterator> 4394# include <new> 4395# include <type_traits> 4396# include <typeinfo> 4397# include <utility> 4398# include <vector> 4399#endif 4400 4401#endif // _LIBCPP_STRING 4402