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 16namespace std 17{ 18 19template <class stateT> 20class fpos 21{ 22private: 23 stateT st; 24public: 25 fpos(streamoff = streamoff()); 26 27 operator streamoff() const; 28 29 stateT state() const; 30 void state(stateT); 31 32 fpos& operator+=(streamoff); 33 fpos operator+ (streamoff) const; 34 fpos& operator-=(streamoff); 35 fpos operator- (streamoff) const; 36}; 37 38template <class stateT> streamoff operator-(const fpos<stateT>& x, const fpos<stateT>& y); 39 40template <class stateT> bool operator==(const fpos<stateT>& x, const fpos<stateT>& y); 41template <class stateT> bool operator!=(const fpos<stateT>& x, const fpos<stateT>& y); 42 43template <class charT> 44struct char_traits 45{ 46 typedef charT char_type; 47 typedef ... int_type; 48 typedef streamoff off_type; 49 typedef streampos pos_type; 50 typedef mbstate_t state_type; 51 52 static void assign(char_type& c1, const char_type& c2) noexcept; 53 static constexpr bool eq(char_type c1, char_type c2) noexcept; 54 static constexpr bool lt(char_type c1, char_type c2) noexcept; 55 56 static int compare(const char_type* s1, const char_type* s2, size_t n); 57 static size_t length(const char_type* s); 58 static const char_type* find(const char_type* s, size_t n, const char_type& a); 59 static char_type* move(char_type* s1, const char_type* s2, size_t n); 60 static char_type* copy(char_type* s1, const char_type* s2, size_t n); 61 static char_type* assign(char_type* s, size_t n, char_type a); 62 63 static constexpr int_type not_eof(int_type c) noexcept; 64 static constexpr char_type to_char_type(int_type c) noexcept; 65 static constexpr int_type to_int_type(char_type c) noexcept; 66 static constexpr bool eq_int_type(int_type c1, int_type c2) noexcept; 67 static constexpr int_type eof() noexcept; 68}; 69 70template <> struct char_traits<char>; 71template <> struct char_traits<wchar_t>; 72template <> struct char_traits<char8_t>; // C++20 73template <> struct char_traits<char16_t>; 74template <> struct char_traits<char32_t>; 75 76template<class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> > 77class basic_string 78{ 79public: 80// types: 81 typedef traits traits_type; 82 typedef typename traits_type::char_type value_type; 83 typedef Allocator allocator_type; 84 typedef typename allocator_type::size_type size_type; 85 typedef typename allocator_type::difference_type difference_type; 86 typedef typename allocator_type::reference reference; 87 typedef typename allocator_type::const_reference const_reference; 88 typedef typename allocator_type::pointer pointer; 89 typedef typename allocator_type::const_pointer const_pointer; 90 typedef implementation-defined iterator; 91 typedef implementation-defined const_iterator; 92 typedef std::reverse_iterator<iterator> reverse_iterator; 93 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 94 95 static const size_type npos = -1; 96 97 basic_string() 98 noexcept(is_nothrow_default_constructible<allocator_type>::value); 99 explicit basic_string(const allocator_type& a); 100 basic_string(const basic_string& str); 101 basic_string(basic_string&& str) 102 noexcept(is_nothrow_move_constructible<allocator_type>::value); 103 basic_string(const basic_string& str, size_type pos, 104 const allocator_type& a = allocator_type()); 105 basic_string(const basic_string& str, size_type pos, size_type n, 106 const Allocator& a = Allocator()); 107 template<class T> 108 basic_string(const T& t, size_type pos, size_type n, const Allocator& a = Allocator()); // C++17 109 template <class T> 110 explicit basic_string(const T& t, const Allocator& a = Allocator()); // C++17 111 basic_string(const value_type* s, const allocator_type& a = allocator_type()); 112 basic_string(const value_type* s, size_type n, const allocator_type& a = allocator_type()); 113 basic_string(nullptr_t) = delete; // C++2b 114 basic_string(size_type n, value_type c, const allocator_type& a = allocator_type()); 115 template<class InputIterator> 116 basic_string(InputIterator begin, InputIterator end, 117 const allocator_type& a = allocator_type()); 118 basic_string(initializer_list<value_type>, const Allocator& = Allocator()); 119 basic_string(const basic_string&, const Allocator&); 120 basic_string(basic_string&&, const Allocator&); 121 122 ~basic_string(); 123 124 operator basic_string_view<charT, traits>() const noexcept; 125 126 basic_string& operator=(const basic_string& str); 127 template <class T> 128 basic_string& operator=(const T& t); // C++17 129 basic_string& operator=(basic_string&& str) 130 noexcept( 131 allocator_type::propagate_on_container_move_assignment::value || 132 allocator_type::is_always_equal::value ); // C++17 133 basic_string& operator=(const value_type* s); 134 basic_string& operator=(nullptr_t) = delete; // C++2b 135 basic_string& operator=(value_type c); 136 basic_string& operator=(initializer_list<value_type>); 137 138 iterator begin() noexcept; 139 const_iterator begin() const noexcept; 140 iterator end() noexcept; 141 const_iterator end() const noexcept; 142 143 reverse_iterator rbegin() noexcept; 144 const_reverse_iterator rbegin() const noexcept; 145 reverse_iterator rend() noexcept; 146 const_reverse_iterator rend() const noexcept; 147 148 const_iterator cbegin() const noexcept; 149 const_iterator cend() const noexcept; 150 const_reverse_iterator crbegin() const noexcept; 151 const_reverse_iterator crend() const noexcept; 152 153 size_type size() const noexcept; 154 size_type length() const noexcept; 155 size_type max_size() const noexcept; 156 size_type capacity() const noexcept; 157 158 void resize(size_type n, value_type c); 159 void resize(size_type n); 160 161 template<class Operation> 162 constexpr void resize_and_overwrite(size_type n, Operation op); // since C++23 163 164 void reserve(size_type res_arg); 165 void reserve(); // deprecated in C++20 166 void shrink_to_fit(); 167 void clear() noexcept; 168 bool empty() const noexcept; 169 170 const_reference operator[](size_type pos) const; 171 reference operator[](size_type pos); 172 173 const_reference at(size_type n) const; 174 reference at(size_type n); 175 176 basic_string& operator+=(const basic_string& str); 177 template <class T> 178 basic_string& operator+=(const T& t); // C++17 179 basic_string& operator+=(const value_type* s); 180 basic_string& operator+=(value_type c); 181 basic_string& operator+=(initializer_list<value_type>); 182 183 basic_string& append(const basic_string& str); 184 template <class T> 185 basic_string& append(const T& t); // C++17 186 basic_string& append(const basic_string& str, size_type pos, size_type n=npos); //C++14 187 template <class T> 188 basic_string& append(const T& t, size_type pos, size_type n=npos); // C++17 189 basic_string& append(const value_type* s, size_type n); 190 basic_string& append(const value_type* s); 191 basic_string& append(size_type n, value_type c); 192 template<class InputIterator> 193 basic_string& append(InputIterator first, InputIterator last); 194 basic_string& append(initializer_list<value_type>); 195 196 void push_back(value_type c); 197 void pop_back(); 198 reference front(); 199 const_reference front() const; 200 reference back(); 201 const_reference back() const; 202 203 basic_string& assign(const basic_string& str); 204 template <class T> 205 basic_string& assign(const T& t); // C++17 206 basic_string& assign(basic_string&& str); 207 basic_string& assign(const basic_string& str, size_type pos, size_type n=npos); // C++14 208 template <class T> 209 basic_string& assign(const T& t, size_type pos, size_type n=npos); // C++17 210 basic_string& assign(const value_type* s, size_type n); 211 basic_string& assign(const value_type* s); 212 basic_string& assign(size_type n, value_type c); 213 template<class InputIterator> 214 basic_string& assign(InputIterator first, InputIterator last); 215 basic_string& assign(initializer_list<value_type>); 216 217 basic_string& insert(size_type pos1, const basic_string& str); 218 template <class T> 219 basic_string& insert(size_type pos1, const T& t); 220 basic_string& insert(size_type pos1, const basic_string& str, 221 size_type pos2, size_type n); 222 template <class T> 223 basic_string& insert(size_type pos1, const T& t, size_type pos2, size_type n); // C++17 224 basic_string& insert(size_type pos, const value_type* s, size_type n=npos); //C++14 225 basic_string& insert(size_type pos, const value_type* s); 226 basic_string& insert(size_type pos, size_type n, value_type c); 227 iterator insert(const_iterator p, value_type c); 228 iterator insert(const_iterator p, size_type n, value_type c); 229 template<class InputIterator> 230 iterator insert(const_iterator p, InputIterator first, InputIterator last); 231 iterator insert(const_iterator p, initializer_list<value_type>); 232 233 basic_string& erase(size_type pos = 0, size_type n = npos); 234 iterator erase(const_iterator position); 235 iterator erase(const_iterator first, const_iterator last); 236 237 basic_string& replace(size_type pos1, size_type n1, const basic_string& str); 238 template <class T> 239 basic_string& replace(size_type pos1, size_type n1, const T& t); // C++17 240 basic_string& replace(size_type pos1, size_type n1, const basic_string& str, 241 size_type pos2, size_type n2=npos); // C++14 242 template <class T> 243 basic_string& replace(size_type pos1, size_type n1, const T& t, 244 size_type pos2, size_type n); // C++17 245 basic_string& replace(size_type pos, size_type n1, const value_type* s, size_type n2); 246 basic_string& replace(size_type pos, size_type n1, const value_type* s); 247 basic_string& replace(size_type pos, size_type n1, size_type n2, value_type c); 248 basic_string& replace(const_iterator i1, const_iterator i2, const basic_string& str); 249 template <class T> 250 basic_string& replace(const_iterator i1, const_iterator i2, const T& t); // C++17 251 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s, size_type n); 252 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s); 253 basic_string& replace(const_iterator i1, const_iterator i2, size_type n, value_type c); 254 template<class InputIterator> 255 basic_string& replace(const_iterator i1, const_iterator i2, InputIterator j1, InputIterator j2); 256 basic_string& replace(const_iterator i1, const_iterator i2, initializer_list<value_type>); 257 258 size_type copy(value_type* s, size_type n, size_type pos = 0) const; 259 basic_string substr(size_type pos = 0, size_type n = npos) const; 260 261 void swap(basic_string& str) 262 noexcept(allocator_traits<allocator_type>::propagate_on_container_swap::value || 263 allocator_traits<allocator_type>::is_always_equal::value); // C++17 264 265 const value_type* c_str() const noexcept; 266 const value_type* data() const noexcept; 267 value_type* data() noexcept; // C++17 268 269 allocator_type get_allocator() const noexcept; 270 271 size_type find(const basic_string& str, size_type pos = 0) const noexcept; 272 template <class T> 273 size_type find(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension 274 size_type find(const value_type* s, size_type pos, size_type n) const noexcept; 275 size_type find(const value_type* s, size_type pos = 0) const noexcept; 276 size_type find(value_type c, size_type pos = 0) const noexcept; 277 278 size_type rfind(const basic_string& str, size_type pos = npos) const noexcept; 279 template <class T> 280 size_type rfind(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension 281 size_type rfind(const value_type* s, size_type pos, size_type n) const noexcept; 282 size_type rfind(const value_type* s, size_type pos = npos) const noexcept; 283 size_type rfind(value_type c, size_type pos = npos) const noexcept; 284 285 size_type find_first_of(const basic_string& str, size_type pos = 0) const noexcept; 286 template <class T> 287 size_type find_first_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension 288 size_type find_first_of(const value_type* s, size_type pos, size_type n) const noexcept; 289 size_type find_first_of(const value_type* s, size_type pos = 0) const noexcept; 290 size_type find_first_of(value_type c, size_type pos = 0) const noexcept; 291 292 size_type find_last_of(const basic_string& str, size_type pos = npos) const noexcept; 293 template <class T> 294 size_type find_last_of(const T& t, size_type pos = npos) const noexcept noexcept; // C++17, noexcept as an extension 295 size_type find_last_of(const value_type* s, size_type pos, size_type n) const noexcept; 296 size_type find_last_of(const value_type* s, size_type pos = npos) const noexcept; 297 size_type find_last_of(value_type c, size_type pos = npos) const noexcept; 298 299 size_type find_first_not_of(const basic_string& str, size_type pos = 0) const noexcept; 300 template <class T> 301 size_type find_first_not_of(const T& t, size_type pos = 0) const noexcept; // C++17, noexcept as an extension 302 size_type find_first_not_of(const value_type* s, size_type pos, size_type n) const noexcept; 303 size_type find_first_not_of(const value_type* s, size_type pos = 0) const noexcept; 304 size_type find_first_not_of(value_type c, size_type pos = 0) const noexcept; 305 306 size_type find_last_not_of(const basic_string& str, size_type pos = npos) const noexcept; 307 template <class T> 308 size_type find_last_not_of(const T& t, size_type pos = npos) const noexcept; // C++17, noexcept as an extension 309 size_type find_last_not_of(const value_type* s, size_type pos, size_type n) const noexcept; 310 size_type find_last_not_of(const value_type* s, size_type pos = npos) const noexcept; 311 size_type find_last_not_of(value_type c, size_type pos = npos) const noexcept; 312 313 int compare(const basic_string& str) const noexcept; 314 template <class T> 315 int compare(const T& t) const noexcept; // C++17, noexcept as an extension 316 int compare(size_type pos1, size_type n1, const basic_string& str) const; 317 template <class T> 318 int compare(size_type pos1, size_type n1, const T& t) const; // C++17 319 int compare(size_type pos1, size_type n1, const basic_string& str, 320 size_type pos2, size_type n2=npos) const; // C++14 321 template <class T> 322 int compare(size_type pos1, size_type n1, const T& t, 323 size_type pos2, size_type n2=npos) const; // C++17 324 int compare(const value_type* s) const noexcept; 325 int compare(size_type pos1, size_type n1, const value_type* s) const; 326 int compare(size_type pos1, size_type n1, const value_type* s, size_type n2) const; 327 328 bool starts_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 329 bool starts_with(charT c) const noexcept; // C++20 330 bool starts_with(const charT* s) const; // C++20 331 bool ends_with(basic_string_view<charT, traits> sv) const noexcept; // C++20 332 bool ends_with(charT c) const noexcept; // C++20 333 bool ends_with(const charT* s) const; // C++20 334 335 constexpr bool contains(basic_string_view<charT, traits> sv) const noexcept; // C++2b 336 constexpr bool contains(charT c) const noexcept; // C++2b 337 constexpr bool contains(const charT* s) const; // C++2b 338 339 bool __invariants() const; 340}; 341 342template<class InputIterator, 343 class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 344basic_string(InputIterator, InputIterator, Allocator = Allocator()) 345 -> basic_string<typename iterator_traits<InputIterator>::value_type, 346 char_traits<typename iterator_traits<InputIterator>::value_type>, 347 Allocator>; // C++17 348 349template<class charT, class traits, class Allocator> 350basic_string<charT, traits, Allocator> 351operator+(const basic_string<charT, traits, Allocator>& lhs, 352 const basic_string<charT, traits, Allocator>& rhs); 353 354template<class charT, class traits, class Allocator> 355basic_string<charT, traits, Allocator> 356operator+(const charT* lhs , const basic_string<charT,traits,Allocator>&rhs); 357 358template<class charT, class traits, class Allocator> 359basic_string<charT, traits, Allocator> 360operator+(charT lhs, const basic_string<charT,traits,Allocator>& rhs); 361 362template<class charT, class traits, class Allocator> 363basic_string<charT, traits, Allocator> 364operator+(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs); 365 366template<class charT, class traits, class Allocator> 367basic_string<charT, traits, Allocator> 368operator+(const basic_string<charT, traits, Allocator>& lhs, charT rhs); 369 370template<class charT, class traits, class Allocator> 371bool operator==(const basic_string<charT, traits, Allocator>& lhs, 372 const basic_string<charT, traits, Allocator>& rhs) noexcept; 373 374template<class charT, class traits, class Allocator> 375bool operator==(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 376 377template<class charT, class traits, class Allocator> 378bool operator==(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs) noexcept; 379 380template<class charT, class traits, class Allocator> 381bool operator!=(const basic_string<charT,traits,Allocator>& lhs, 382 const basic_string<charT, traits, Allocator>& rhs) noexcept; 383 384template<class charT, class traits, class Allocator> 385bool operator!=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 386 387template<class charT, class traits, class Allocator> 388bool operator!=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 389 390template<class charT, class traits, class Allocator> 391bool operator< (const basic_string<charT, traits, Allocator>& lhs, 392 const basic_string<charT, traits, Allocator>& rhs) noexcept; 393 394template<class charT, class traits, class Allocator> 395bool operator< (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 396 397template<class charT, class traits, class Allocator> 398bool operator< (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 399 400template<class charT, class traits, class Allocator> 401bool operator> (const basic_string<charT, traits, Allocator>& lhs, 402 const basic_string<charT, traits, Allocator>& rhs) noexcept; 403 404template<class charT, class traits, class Allocator> 405bool operator> (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 406 407template<class charT, class traits, class Allocator> 408bool operator> (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 409 410template<class charT, class traits, class Allocator> 411bool operator<=(const basic_string<charT, traits, Allocator>& lhs, 412 const basic_string<charT, traits, Allocator>& rhs) noexcept; 413 414template<class charT, class traits, class Allocator> 415bool operator<=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 416 417template<class charT, class traits, class Allocator> 418bool operator<=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 419 420template<class charT, class traits, class Allocator> 421bool operator>=(const basic_string<charT, traits, Allocator>& lhs, 422 const basic_string<charT, traits, Allocator>& rhs) noexcept; 423 424template<class charT, class traits, class Allocator> 425bool operator>=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 426 427template<class charT, class traits, class Allocator> 428bool operator>=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 429 430template<class charT, class traits, class Allocator> 431void swap(basic_string<charT, traits, Allocator>& lhs, 432 basic_string<charT, traits, Allocator>& rhs) 433 noexcept(noexcept(lhs.swap(rhs))); 434 435template<class charT, class traits, class Allocator> 436basic_istream<charT, traits>& 437operator>>(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 438 439template<class charT, class traits, class Allocator> 440basic_ostream<charT, traits>& 441operator<<(basic_ostream<charT, traits>& os, const basic_string<charT, traits, Allocator>& str); 442 443template<class charT, class traits, class Allocator> 444basic_istream<charT, traits>& 445getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str, 446 charT delim); 447 448template<class charT, class traits, class Allocator> 449basic_istream<charT, traits>& 450getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 451 452template<class charT, class traits, class Allocator, class U> 453typename basic_string<charT, traits, Allocator>::size_type 454erase(basic_string<charT, traits, Allocator>& c, const U& value); // C++20 455template<class charT, class traits, class Allocator, class Predicate> 456typename basic_string<charT, traits, Allocator>::size_type 457erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred); // C++20 458 459typedef basic_string<char> string; 460typedef basic_string<wchar_t> wstring; 461typedef basic_string<char8_t> u8string; // C++20 462typedef basic_string<char16_t> u16string; 463typedef basic_string<char32_t> u32string; 464 465int stoi (const string& str, size_t* idx = nullptr, int base = 10); 466long stol (const string& str, size_t* idx = nullptr, int base = 10); 467unsigned long stoul (const string& str, size_t* idx = nullptr, int base = 10); 468long long stoll (const string& str, size_t* idx = nullptr, int base = 10); 469unsigned long long stoull(const string& str, size_t* idx = nullptr, int base = 10); 470 471float stof (const string& str, size_t* idx = nullptr); 472double stod (const string& str, size_t* idx = nullptr); 473long double stold(const string& str, size_t* idx = nullptr); 474 475string to_string(int val); 476string to_string(unsigned val); 477string to_string(long val); 478string to_string(unsigned long val); 479string to_string(long long val); 480string to_string(unsigned long long val); 481string to_string(float val); 482string to_string(double val); 483string to_string(long double val); 484 485int stoi (const wstring& str, size_t* idx = nullptr, int base = 10); 486long stol (const wstring& str, size_t* idx = nullptr, int base = 10); 487unsigned long stoul (const wstring& str, size_t* idx = nullptr, int base = 10); 488long long stoll (const wstring& str, size_t* idx = nullptr, int base = 10); 489unsigned long long stoull(const wstring& str, size_t* idx = nullptr, int base = 10); 490 491float stof (const wstring& str, size_t* idx = nullptr); 492double stod (const wstring& str, size_t* idx = nullptr); 493long double stold(const wstring& str, size_t* idx = nullptr); 494 495wstring to_wstring(int val); 496wstring to_wstring(unsigned val); 497wstring to_wstring(long val); 498wstring to_wstring(unsigned long val); 499wstring to_wstring(long long val); 500wstring to_wstring(unsigned long long val); 501wstring to_wstring(float val); 502wstring to_wstring(double val); 503wstring to_wstring(long double val); 504 505template <> struct hash<string>; 506template <> struct hash<u8string>; // C++20 507template <> struct hash<u16string>; 508template <> struct hash<u32string>; 509template <> struct hash<wstring>; 510 511basic_string<char> operator "" s( const char *str, size_t len ); // C++14 512basic_string<wchar_t> operator "" s( const wchar_t *str, size_t len ); // C++14 513basic_string<char8_t> operator "" s( const char8_t *str, size_t len ); // C++20 514basic_string<char16_t> operator "" s( const char16_t *str, size_t len ); // C++14 515basic_string<char32_t> operator "" s( const char32_t *str, size_t len ); // C++14 516 517} // std 518 519*/ 520 521#include <__algorithm/max.h> 522#include <__algorithm/min.h> 523#include <__algorithm/remove.h> 524#include <__algorithm/remove_if.h> 525#include <__assert> 526#include <__config> 527#include <__debug> 528#include <__ios/fpos.h> 529#include <__iterator/wrap_iter.h> 530#include <compare> 531#include <cstdio> // EOF 532#include <cstdlib> 533#include <cstring> 534#include <initializer_list> 535#include <iosfwd> 536#include <iterator> 537#include <memory> 538#include <stdexcept> 539#include <string_view> 540#include <type_traits> 541#include <utility> 542#include <version> 543 544// TODO: remove these headers 545#include <__functional/binary_function.h> 546#include <__functional/invoke.h> 547#include <__functional/operations.h> 548#include <__functional/reference_wrapper.h> 549#include <__functional/unary_function.h> 550#include <__functional/weak_result_type.h> 551#include <new> 552#include <typeinfo> 553 554#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 555# include <cwchar> 556#endif 557 558#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 559# include <cstdint> 560#endif 561 562#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 563# pragma GCC system_header 564#endif 565 566_LIBCPP_PUSH_MACROS 567#include <__undef_macros> 568 569 570_LIBCPP_BEGIN_NAMESPACE_STD 571 572// basic_string 573 574template<class _CharT, class _Traits, class _Allocator> 575basic_string<_CharT, _Traits, _Allocator> 576operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, 577 const basic_string<_CharT, _Traits, _Allocator>& __y); 578 579template<class _CharT, class _Traits, class _Allocator> 580basic_string<_CharT, _Traits, _Allocator> 581operator+(const _CharT* __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 582 583template<class _CharT, class _Traits, class _Allocator> 584basic_string<_CharT, _Traits, _Allocator> 585operator+(_CharT __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 586 587template<class _CharT, class _Traits, class _Allocator> 588inline _LIBCPP_INLINE_VISIBILITY 589basic_string<_CharT, _Traits, _Allocator> 590operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); 591 592template<class _CharT, class _Traits, class _Allocator> 593basic_string<_CharT, _Traits, _Allocator> 594operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); 595 596_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS string operator+<char, char_traits<char>, allocator<char> >(char const*, string const&)) 597 598template <class _Iter> 599struct __string_is_trivial_iterator : public false_type {}; 600 601template <class _Tp> 602struct __string_is_trivial_iterator<_Tp*> 603 : public is_arithmetic<_Tp> {}; 604 605template <class _Iter> 606struct __string_is_trivial_iterator<__wrap_iter<_Iter> > 607 : public __string_is_trivial_iterator<_Iter> {}; 608 609template <class _CharT, class _Traits, class _Tp> 610struct __can_be_converted_to_string_view : public _BoolConstant< 611 is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && 612 !is_convertible<const _Tp&, const _CharT*>::value 613 > {}; 614 615#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 616 617template <class _CharT, size_t = sizeof(_CharT)> 618struct __padding 619{ 620 unsigned char __xx[sizeof(_CharT)-1]; 621}; 622 623template <class _CharT> 624struct __padding<_CharT, 1> 625{ 626}; 627 628#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 629 630#ifndef _LIBCPP_HAS_NO_CHAR8_T 631typedef basic_string<char8_t> u8string; 632#endif 633 634#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 635typedef basic_string<char16_t> u16string; 636typedef basic_string<char32_t> u32string; 637#endif 638 639template<class _CharT, class _Traits, class _Allocator> 640class 641 _LIBCPP_TEMPLATE_VIS 642#ifndef _LIBCPP_HAS_NO_CHAR8_T 643 _LIBCPP_PREFERRED_NAME(u8string) 644#endif 645#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 646 _LIBCPP_PREFERRED_NAME(u16string) 647 _LIBCPP_PREFERRED_NAME(u32string) 648#endif 649 basic_string 650{ 651public: 652 typedef basic_string __self; 653 typedef basic_string_view<_CharT, _Traits> __self_view; 654 typedef _Traits traits_type; 655 typedef _CharT value_type; 656 typedef _Allocator allocator_type; 657 typedef allocator_traits<allocator_type> __alloc_traits; 658 typedef typename __alloc_traits::size_type size_type; 659 typedef typename __alloc_traits::difference_type difference_type; 660 typedef value_type& reference; 661 typedef const value_type& const_reference; 662 typedef typename __alloc_traits::pointer pointer; 663 typedef typename __alloc_traits::const_pointer const_pointer; 664 665 static_assert((!is_array<value_type>::value), "Character type of basic_string must not be an array"); 666 static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string must be standard-layout"); 667 static_assert(( is_trivial<value_type>::value), "Character type of basic_string must be trivial"); 668 static_assert(( is_same<_CharT, typename traits_type::char_type>::value), 669 "traits_type::char_type must be the same type as CharT"); 670 static_assert(( is_same<typename allocator_type::value_type, value_type>::value), 671 "Allocator::value_type must be same type as value_type"); 672 673 typedef __wrap_iter<pointer> iterator; 674 typedef __wrap_iter<const_pointer> const_iterator; 675 typedef _VSTD::reverse_iterator<iterator> reverse_iterator; 676 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator; 677 678private: 679 680#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 681 682 struct __long 683 { 684 pointer __data_; 685 size_type __size_; 686 size_type __cap_; 687 }; 688 689#ifdef _LIBCPP_BIG_ENDIAN 690 static const size_type __short_mask = 0x01; 691 static const size_type __long_mask = 0x1ul; 692#else // _LIBCPP_BIG_ENDIAN 693 static const size_type __short_mask = 0x80; 694 static const size_type __long_mask = ~(size_type(~0) >> 1); 695#endif // _LIBCPP_BIG_ENDIAN 696 697 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 698 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 699 700 struct __short 701 { 702 value_type __data_[__min_cap]; 703 struct 704 : __padding<value_type> 705 { 706 unsigned char __size_; 707 }; 708 }; 709 710#else 711 712 struct __long 713 { 714 size_type __cap_; 715 size_type __size_; 716 pointer __data_; 717 }; 718 719#ifdef _LIBCPP_BIG_ENDIAN 720 static const size_type __short_mask = 0x80; 721 static const size_type __long_mask = ~(size_type(~0) >> 1); 722#else // _LIBCPP_BIG_ENDIAN 723 static const size_type __short_mask = 0x01; 724 static const size_type __long_mask = 0x1ul; 725#endif // _LIBCPP_BIG_ENDIAN 726 727 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 728 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 729 730 struct __short 731 { 732 union 733 { 734 unsigned char __size_; 735 value_type __lx; 736 }; 737 value_type __data_[__min_cap]; 738 }; 739 740#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 741 742 union __ulx{__long __lx; __short __lxx;}; 743 744 enum {__n_words = sizeof(__ulx) / sizeof(size_type)}; 745 746 struct __raw 747 { 748 size_type __words[__n_words]; 749 }; 750 751 struct __rep 752 { 753 union 754 { 755 __long __l; 756 __short __s; 757 __raw __r; 758 }; 759 }; 760 761 __compressed_pair<__rep, allocator_type> __r_; 762 763public: 764 _LIBCPP_TEMPLATE_DATA_VIS 765 static const size_type npos = -1; 766 767 _LIBCPP_INLINE_VISIBILITY basic_string() 768 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value); 769 770 _LIBCPP_INLINE_VISIBILITY explicit basic_string(const allocator_type& __a) 771#if _LIBCPP_STD_VER <= 14 772 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value); 773#else 774 _NOEXCEPT; 775#endif 776 777 basic_string(const basic_string& __str); 778 basic_string(const basic_string& __str, const allocator_type& __a); 779 780#ifndef _LIBCPP_CXX03_LANG 781 _LIBCPP_INLINE_VISIBILITY 782 basic_string(basic_string&& __str) 783#if _LIBCPP_STD_VER <= 14 784 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value); 785#else 786 _NOEXCEPT; 787#endif 788 789 _LIBCPP_INLINE_VISIBILITY 790 basic_string(basic_string&& __str, const allocator_type& __a); 791#endif // _LIBCPP_CXX03_LANG 792 793 template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> > 794 _LIBCPP_INLINE_VISIBILITY 795 basic_string(const _CharT* __s) : __r_(__default_init_tag(), __default_init_tag()) { 796 _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*) detected nullptr"); 797 __init(__s, traits_type::length(__s)); 798 _VSTD::__debug_db_insert_c(this); 799 } 800 801 template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> > 802 _LIBCPP_INLINE_VISIBILITY 803 basic_string(const _CharT* __s, const _Allocator& __a); 804 805#if _LIBCPP_STD_VER > 20 806 basic_string(nullptr_t) = delete; 807#endif 808 809 _LIBCPP_INLINE_VISIBILITY 810 basic_string(const _CharT* __s, size_type __n); 811 _LIBCPP_INLINE_VISIBILITY 812 basic_string(const _CharT* __s, size_type __n, const _Allocator& __a); 813 _LIBCPP_INLINE_VISIBILITY 814 basic_string(size_type __n, _CharT __c); 815 816 template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> > 817 _LIBCPP_INLINE_VISIBILITY 818 basic_string(size_type __n, _CharT __c, const _Allocator& __a); 819 820 basic_string(const basic_string& __str, size_type __pos, size_type __n, 821 const _Allocator& __a = _Allocator()); 822 _LIBCPP_INLINE_VISIBILITY 823 basic_string(const basic_string& __str, size_type __pos, 824 const _Allocator& __a = _Allocator()); 825 826 template<class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 827 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 828 basic_string(const _Tp& __t, size_type __pos, size_type __n, 829 const allocator_type& __a = allocator_type()); 830 831 template<class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 832 !__is_same_uncvref<_Tp, basic_string>::value> > 833 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 834 explicit basic_string(const _Tp& __t); 835 836 template<class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 837 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 838 explicit basic_string(const _Tp& __t, const allocator_type& __a); 839 840 template<class _InputIterator, class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value> > 841 _LIBCPP_INLINE_VISIBILITY 842 basic_string(_InputIterator __first, _InputIterator __last); 843 template<class _InputIterator, class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value> > 844 _LIBCPP_INLINE_VISIBILITY 845 basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a); 846#ifndef _LIBCPP_CXX03_LANG 847 _LIBCPP_INLINE_VISIBILITY 848 basic_string(initializer_list<_CharT> __il); 849 _LIBCPP_INLINE_VISIBILITY 850 basic_string(initializer_list<_CharT> __il, const _Allocator& __a); 851#endif // _LIBCPP_CXX03_LANG 852 853 inline ~basic_string(); 854 855 _LIBCPP_INLINE_VISIBILITY 856 operator __self_view() const _NOEXCEPT { return __self_view(data(), size()); } 857 858 basic_string& operator=(const basic_string& __str); 859 860 template <class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 861 basic_string& operator=(const _Tp& __t) 862 {__self_view __sv = __t; return assign(__sv);} 863 864#ifndef _LIBCPP_CXX03_LANG 865 _LIBCPP_INLINE_VISIBILITY 866 basic_string& operator=(basic_string&& __str) 867 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)); 868 _LIBCPP_INLINE_VISIBILITY 869 basic_string& operator=(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 870#endif 871 _LIBCPP_INLINE_VISIBILITY basic_string& operator=(const value_type* __s) {return assign(__s);} 872#if _LIBCPP_STD_VER > 20 873 basic_string& operator=(nullptr_t) = delete; 874#endif 875 basic_string& operator=(value_type __c); 876 877#if _LIBCPP_DEBUG_LEVEL == 2 878 _LIBCPP_INLINE_VISIBILITY 879 iterator begin() _NOEXCEPT 880 {return iterator(this, __get_pointer());} 881 _LIBCPP_INLINE_VISIBILITY 882 const_iterator begin() const _NOEXCEPT 883 {return const_iterator(this, __get_pointer());} 884 _LIBCPP_INLINE_VISIBILITY 885 iterator end() _NOEXCEPT 886 {return iterator(this, __get_pointer() + size());} 887 _LIBCPP_INLINE_VISIBILITY 888 const_iterator end() const _NOEXCEPT 889 {return const_iterator(this, __get_pointer() + size());} 890#else 891 _LIBCPP_INLINE_VISIBILITY 892 iterator begin() _NOEXCEPT 893 {return iterator(__get_pointer());} 894 _LIBCPP_INLINE_VISIBILITY 895 const_iterator begin() const _NOEXCEPT 896 {return const_iterator(__get_pointer());} 897 _LIBCPP_INLINE_VISIBILITY 898 iterator end() _NOEXCEPT 899 {return iterator(__get_pointer() + size());} 900 _LIBCPP_INLINE_VISIBILITY 901 const_iterator end() const _NOEXCEPT 902 {return const_iterator(__get_pointer() + size());} 903#endif // _LIBCPP_DEBUG_LEVEL == 2 904 _LIBCPP_INLINE_VISIBILITY 905 reverse_iterator rbegin() _NOEXCEPT 906 {return reverse_iterator(end());} 907 _LIBCPP_INLINE_VISIBILITY 908 const_reverse_iterator rbegin() const _NOEXCEPT 909 {return const_reverse_iterator(end());} 910 _LIBCPP_INLINE_VISIBILITY 911 reverse_iterator rend() _NOEXCEPT 912 {return reverse_iterator(begin());} 913 _LIBCPP_INLINE_VISIBILITY 914 const_reverse_iterator rend() const _NOEXCEPT 915 {return const_reverse_iterator(begin());} 916 917 _LIBCPP_INLINE_VISIBILITY 918 const_iterator cbegin() const _NOEXCEPT 919 {return begin();} 920 _LIBCPP_INLINE_VISIBILITY 921 const_iterator cend() const _NOEXCEPT 922 {return end();} 923 _LIBCPP_INLINE_VISIBILITY 924 const_reverse_iterator crbegin() const _NOEXCEPT 925 {return rbegin();} 926 _LIBCPP_INLINE_VISIBILITY 927 const_reverse_iterator crend() const _NOEXCEPT 928 {return rend();} 929 930 _LIBCPP_INLINE_VISIBILITY size_type size() const _NOEXCEPT 931 {return __is_long() ? __get_long_size() : __get_short_size();} 932 _LIBCPP_INLINE_VISIBILITY size_type length() const _NOEXCEPT {return size();} 933 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT; 934 _LIBCPP_INLINE_VISIBILITY size_type capacity() const _NOEXCEPT 935 {return (__is_long() ? __get_long_cap() 936 : static_cast<size_type>(__min_cap)) - 1;} 937 938 void resize(size_type __n, value_type __c); 939 _LIBCPP_INLINE_VISIBILITY void resize(size_type __n) {resize(__n, value_type());} 940 941 void reserve(size_type __requested_capacity); 942 943#if _LIBCPP_STD_VER > 20 944 template <class _Op> 945 _LIBCPP_HIDE_FROM_ABI constexpr 946 void resize_and_overwrite(size_type __n, _Op __op) { 947 __resize_default_init(__n); 948 __erase_to_end(_VSTD::move(__op)(data(), _LIBCPP_AUTO_CAST(__n))); 949 } 950#endif 951 952 _LIBCPP_INLINE_VISIBILITY void __resize_default_init(size_type __n); 953 954 _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_INLINE_VISIBILITY 955 void reserve() _NOEXCEPT {shrink_to_fit();} 956 _LIBCPP_INLINE_VISIBILITY 957 void shrink_to_fit() _NOEXCEPT; 958 _LIBCPP_INLINE_VISIBILITY 959 void clear() _NOEXCEPT; 960 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 961 bool empty() const _NOEXCEPT {return size() == 0;} 962 963 _LIBCPP_INLINE_VISIBILITY const_reference operator[](size_type __pos) const _NOEXCEPT; 964 _LIBCPP_INLINE_VISIBILITY reference operator[](size_type __pos) _NOEXCEPT; 965 966 const_reference at(size_type __n) const; 967 reference at(size_type __n); 968 969 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(const basic_string& __str) {return append(__str);} 970 971 template <class _Tp> 972 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 973 __enable_if_t 974 < 975 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 976 && !__is_same_uncvref<_Tp, basic_string >::value, 977 basic_string& 978 > 979 operator+=(const _Tp& __t) {__self_view __sv = __t; return append(__sv);} 980 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(const value_type* __s) {return append(__s);} 981 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(value_type __c) {push_back(__c); return *this;} 982#ifndef _LIBCPP_CXX03_LANG 983 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(initializer_list<value_type> __il) {return append(__il);} 984#endif // _LIBCPP_CXX03_LANG 985 986 _LIBCPP_INLINE_VISIBILITY 987 basic_string& append(const basic_string& __str); 988 989 template <class _Tp> 990 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 991 __enable_if_t< 992 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 993 && !__is_same_uncvref<_Tp, basic_string>::value, 994 basic_string& 995 > 996 append(const _Tp& __t) { __self_view __sv = __t; return append(__sv.data(), __sv.size()); } 997 basic_string& append(const basic_string& __str, size_type __pos, size_type __n=npos); 998 999 template <class _Tp> 1000 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1001 __enable_if_t 1002 < 1003 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 1004 && !__is_same_uncvref<_Tp, basic_string>::value, 1005 basic_string& 1006 > 1007 append(const _Tp& __t, size_type __pos, size_type __n=npos); 1008 basic_string& append(const value_type* __s, size_type __n); 1009 basic_string& append(const value_type* __s); 1010 basic_string& append(size_type __n, value_type __c); 1011 1012 _LIBCPP_INLINE_VISIBILITY 1013 void __append_default_init(size_type __n); 1014 1015 template<class _InputIterator> 1016 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1017 __enable_if_t 1018 < 1019 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 1020 basic_string& 1021 > 1022 _LIBCPP_INLINE_VISIBILITY 1023 append(_InputIterator __first, _InputIterator __last) { 1024 const basic_string __temp(__first, __last, __alloc()); 1025 append(__temp.data(), __temp.size()); 1026 return *this; 1027 } 1028 template<class _ForwardIterator> 1029 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1030 __enable_if_t 1031 < 1032 __is_cpp17_forward_iterator<_ForwardIterator>::value, 1033 basic_string& 1034 > 1035 _LIBCPP_INLINE_VISIBILITY 1036 append(_ForwardIterator __first, _ForwardIterator __last); 1037 1038#ifndef _LIBCPP_CXX03_LANG 1039 _LIBCPP_INLINE_VISIBILITY 1040 basic_string& append(initializer_list<value_type> __il) {return append(__il.begin(), __il.size());} 1041#endif // _LIBCPP_CXX03_LANG 1042 1043 void push_back(value_type __c); 1044 _LIBCPP_INLINE_VISIBILITY 1045 void pop_back(); 1046 _LIBCPP_INLINE_VISIBILITY reference front() _NOEXCEPT; 1047 _LIBCPP_INLINE_VISIBILITY const_reference front() const _NOEXCEPT; 1048 _LIBCPP_INLINE_VISIBILITY reference back() _NOEXCEPT; 1049 _LIBCPP_INLINE_VISIBILITY const_reference back() const _NOEXCEPT; 1050 1051 template <class _Tp> 1052 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1053 __enable_if_t 1054 < 1055 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1056 basic_string& 1057 > 1058 assign(const _Tp & __t) { __self_view __sv = __t; return assign(__sv.data(), __sv.size()); } 1059 _LIBCPP_INLINE_VISIBILITY 1060 basic_string& assign(const basic_string& __str) { return *this = __str; } 1061#ifndef _LIBCPP_CXX03_LANG 1062 _LIBCPP_INLINE_VISIBILITY 1063 basic_string& assign(basic_string&& __str) 1064 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) 1065 {*this = _VSTD::move(__str); return *this;} 1066#endif 1067 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n=npos); 1068 template <class _Tp> 1069 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1070 __enable_if_t 1071 < 1072 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 1073 && !__is_same_uncvref<_Tp, basic_string>::value, 1074 basic_string& 1075 > 1076 assign(const _Tp & __t, size_type __pos, size_type __n=npos); 1077 basic_string& assign(const value_type* __s, size_type __n); 1078 basic_string& assign(const value_type* __s); 1079 basic_string& assign(size_type __n, value_type __c); 1080 template<class _InputIterator> 1081 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1082 __enable_if_t 1083 < 1084 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 1085 basic_string& 1086 > 1087 assign(_InputIterator __first, _InputIterator __last); 1088 template<class _ForwardIterator> 1089 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1090 __enable_if_t 1091 < 1092 __is_cpp17_forward_iterator<_ForwardIterator>::value, 1093 basic_string& 1094 > 1095 assign(_ForwardIterator __first, _ForwardIterator __last); 1096#ifndef _LIBCPP_CXX03_LANG 1097 _LIBCPP_INLINE_VISIBILITY 1098 basic_string& assign(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 1099#endif // _LIBCPP_CXX03_LANG 1100 1101 _LIBCPP_INLINE_VISIBILITY 1102 basic_string& insert(size_type __pos1, const basic_string& __str); 1103 1104 template <class _Tp> 1105 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1106 __enable_if_t 1107 < 1108 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1109 basic_string& 1110 > 1111 insert(size_type __pos1, const _Tp& __t) 1112 { __self_view __sv = __t; return insert(__pos1, __sv.data(), __sv.size()); } 1113 1114 template <class _Tp> 1115 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1116 __enable_if_t 1117 < 1118 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1119 basic_string& 1120 > 1121 insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n=npos); 1122 basic_string& insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n=npos); 1123 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); 1124 basic_string& insert(size_type __pos, const value_type* __s); 1125 basic_string& insert(size_type __pos, size_type __n, value_type __c); 1126 iterator insert(const_iterator __pos, value_type __c); 1127 _LIBCPP_INLINE_VISIBILITY 1128 iterator insert(const_iterator __pos, size_type __n, value_type __c); 1129 template<class _InputIterator> 1130 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1131 __enable_if_t 1132 < 1133 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 1134 iterator 1135 > 1136 insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); 1137 template<class _ForwardIterator> 1138 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1139 __enable_if_t 1140 < 1141 __is_cpp17_forward_iterator<_ForwardIterator>::value, 1142 iterator 1143 > 1144 insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); 1145#ifndef _LIBCPP_CXX03_LANG 1146 _LIBCPP_INLINE_VISIBILITY 1147 iterator insert(const_iterator __pos, initializer_list<value_type> __il) 1148 {return insert(__pos, __il.begin(), __il.end());} 1149#endif // _LIBCPP_CXX03_LANG 1150 1151 basic_string& erase(size_type __pos = 0, size_type __n = npos); 1152 _LIBCPP_INLINE_VISIBILITY 1153 iterator erase(const_iterator __pos); 1154 _LIBCPP_INLINE_VISIBILITY 1155 iterator erase(const_iterator __first, const_iterator __last); 1156 1157 _LIBCPP_INLINE_VISIBILITY 1158 basic_string& replace(size_type __pos1, size_type __n1, const basic_string& __str); 1159 1160 template <class _Tp> 1161 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1162 __enable_if_t 1163 < 1164 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1165 basic_string& 1166 > 1167 replace(size_type __pos1, size_type __n1, const _Tp& __t) { __self_view __sv = __t; return replace(__pos1, __n1, __sv.data(), __sv.size()); } 1168 basic_string& replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2=npos); 1169 template <class _Tp> 1170 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1171 __enable_if_t 1172 < 1173 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1174 basic_string& 1175 > 1176 replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2=npos); 1177 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); 1178 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); 1179 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); 1180 _LIBCPP_INLINE_VISIBILITY 1181 basic_string& replace(const_iterator __i1, const_iterator __i2, const basic_string& __str); 1182 1183 template <class _Tp> 1184 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1185 __enable_if_t 1186 < 1187 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1188 basic_string& 1189 > 1190 replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { __self_view __sv = __t; return replace(__i1 - begin(), __i2 - __i1, __sv); } 1191 1192 _LIBCPP_INLINE_VISIBILITY 1193 basic_string& replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n); 1194 _LIBCPP_INLINE_VISIBILITY 1195 basic_string& replace(const_iterator __i1, const_iterator __i2, const value_type* __s); 1196 _LIBCPP_INLINE_VISIBILITY 1197 basic_string& replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c); 1198 template<class _InputIterator> 1199 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1200 __enable_if_t 1201 < 1202 __is_cpp17_input_iterator<_InputIterator>::value, 1203 basic_string& 1204 > 1205 replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); 1206#ifndef _LIBCPP_CXX03_LANG 1207 _LIBCPP_INLINE_VISIBILITY 1208 basic_string& replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) 1209 {return replace(__i1, __i2, __il.begin(), __il.end());} 1210#endif // _LIBCPP_CXX03_LANG 1211 1212 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; 1213 _LIBCPP_INLINE_VISIBILITY 1214 basic_string substr(size_type __pos = 0, size_type __n = npos) const; 1215 1216 _LIBCPP_INLINE_VISIBILITY 1217 void swap(basic_string& __str) 1218#if _LIBCPP_STD_VER >= 14 1219 _NOEXCEPT; 1220#else 1221 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 1222 __is_nothrow_swappable<allocator_type>::value); 1223#endif 1224 1225 _LIBCPP_INLINE_VISIBILITY 1226 const value_type* c_str() const _NOEXCEPT {return data();} 1227 _LIBCPP_INLINE_VISIBILITY 1228 const value_type* data() const _NOEXCEPT {return _VSTD::__to_address(__get_pointer());} 1229#if _LIBCPP_STD_VER > 14 || defined(_LIBCPP_BUILDING_LIBRARY) 1230 _LIBCPP_INLINE_VISIBILITY 1231 value_type* data() _NOEXCEPT {return _VSTD::__to_address(__get_pointer());} 1232#endif 1233 1234 _LIBCPP_INLINE_VISIBILITY 1235 allocator_type get_allocator() const _NOEXCEPT {return __alloc();} 1236 1237 _LIBCPP_INLINE_VISIBILITY 1238 size_type find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1239 1240 template <class _Tp> 1241 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1242 __enable_if_t 1243 < 1244 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1245 size_type 1246 > 1247 find(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1248 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1249 _LIBCPP_INLINE_VISIBILITY 1250 size_type find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1251 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1252 1253 _LIBCPP_INLINE_VISIBILITY 1254 size_type rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1255 1256 template <class _Tp> 1257 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1258 __enable_if_t 1259 < 1260 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1261 size_type 1262 > 1263 rfind(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1264 size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1265 _LIBCPP_INLINE_VISIBILITY 1266 size_type rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1267 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1268 1269 _LIBCPP_INLINE_VISIBILITY 1270 size_type find_first_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1271 1272 template <class _Tp> 1273 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1274 __enable_if_t 1275 < 1276 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1277 size_type 1278 > 1279 find_first_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1280 size_type find_first_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1281 _LIBCPP_INLINE_VISIBILITY 1282 size_type find_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1283 _LIBCPP_INLINE_VISIBILITY 1284 size_type find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1285 1286 _LIBCPP_INLINE_VISIBILITY 1287 size_type find_last_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1288 1289 template <class _Tp> 1290 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1291 __enable_if_t 1292 < 1293 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1294 size_type 1295 > 1296 find_last_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1297 size_type find_last_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1298 _LIBCPP_INLINE_VISIBILITY 1299 size_type find_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1300 _LIBCPP_INLINE_VISIBILITY 1301 size_type find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1302 1303 _LIBCPP_INLINE_VISIBILITY 1304 size_type find_first_not_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1305 1306 template <class _Tp> 1307 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1308 __enable_if_t 1309 < 1310 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1311 size_type 1312 > 1313 find_first_not_of(const _Tp &__t, size_type __pos = 0) const _NOEXCEPT; 1314 size_type find_first_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1315 _LIBCPP_INLINE_VISIBILITY 1316 size_type find_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1317 _LIBCPP_INLINE_VISIBILITY 1318 size_type find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1319 1320 _LIBCPP_INLINE_VISIBILITY 1321 size_type find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1322 1323 template <class _Tp> 1324 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1325 __enable_if_t 1326 < 1327 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1328 size_type 1329 > 1330 find_last_not_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1331 size_type find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1332 _LIBCPP_INLINE_VISIBILITY 1333 size_type find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1334 _LIBCPP_INLINE_VISIBILITY 1335 size_type find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1336 1337 _LIBCPP_INLINE_VISIBILITY 1338 int compare(const basic_string& __str) const _NOEXCEPT; 1339 1340 template <class _Tp> 1341 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1342 __enable_if_t 1343 < 1344 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1345 int 1346 > 1347 compare(const _Tp &__t) const _NOEXCEPT; 1348 1349 template <class _Tp> 1350 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1351 __enable_if_t 1352 < 1353 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1354 int 1355 > 1356 compare(size_type __pos1, size_type __n1, const _Tp& __t) const; 1357 1358 _LIBCPP_INLINE_VISIBILITY 1359 int compare(size_type __pos1, size_type __n1, const basic_string& __str) const; 1360 int compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2=npos) const; 1361 1362 template <class _Tp> 1363 inline _LIBCPP_INLINE_VISIBILITY 1364 __enable_if_t 1365 < 1366 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1367 int 1368 > 1369 compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2=npos) const; 1370 int compare(const value_type* __s) const _NOEXCEPT; 1371 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; 1372 int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; 1373 1374#if _LIBCPP_STD_VER > 17 1375 constexpr _LIBCPP_INLINE_VISIBILITY 1376 bool starts_with(__self_view __sv) const noexcept 1377 { return __self_view(data(), size()).starts_with(__sv); } 1378 1379 constexpr _LIBCPP_INLINE_VISIBILITY 1380 bool starts_with(value_type __c) const noexcept 1381 { return !empty() && _Traits::eq(front(), __c); } 1382 1383 constexpr _LIBCPP_INLINE_VISIBILITY 1384 bool starts_with(const value_type* __s) const noexcept 1385 { return starts_with(__self_view(__s)); } 1386 1387 constexpr _LIBCPP_INLINE_VISIBILITY 1388 bool ends_with(__self_view __sv) const noexcept 1389 { return __self_view(data(), size()).ends_with( __sv); } 1390 1391 constexpr _LIBCPP_INLINE_VISIBILITY 1392 bool ends_with(value_type __c) const noexcept 1393 { return !empty() && _Traits::eq(back(), __c); } 1394 1395 constexpr _LIBCPP_INLINE_VISIBILITY 1396 bool ends_with(const value_type* __s) const noexcept 1397 { return ends_with(__self_view(__s)); } 1398#endif 1399 1400#if _LIBCPP_STD_VER > 20 1401 constexpr _LIBCPP_INLINE_VISIBILITY 1402 bool contains(__self_view __sv) const noexcept 1403 { return __self_view(data(), size()).contains(__sv); } 1404 1405 constexpr _LIBCPP_INLINE_VISIBILITY 1406 bool contains(value_type __c) const noexcept 1407 { return __self_view(data(), size()).contains(__c); } 1408 1409 constexpr _LIBCPP_INLINE_VISIBILITY 1410 bool contains(const value_type* __s) const 1411 { return __self_view(data(), size()).contains(__s); } 1412#endif 1413 1414 _LIBCPP_INLINE_VISIBILITY bool __invariants() const; 1415 1416 _LIBCPP_INLINE_VISIBILITY void __clear_and_shrink() _NOEXCEPT; 1417 1418 _LIBCPP_INLINE_VISIBILITY void __shrink_or_extend(size_type __target_capacity); 1419 1420 _LIBCPP_INLINE_VISIBILITY 1421 bool __is_long() const _NOEXCEPT 1422 {return bool(__r_.first().__s.__size_ & __short_mask);} 1423 1424#if _LIBCPP_DEBUG_LEVEL == 2 1425 1426 bool __dereferenceable(const const_iterator* __i) const; 1427 bool __decrementable(const const_iterator* __i) const; 1428 bool __addable(const const_iterator* __i, ptrdiff_t __n) const; 1429 bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const; 1430 1431#endif // _LIBCPP_DEBUG_LEVEL == 2 1432 1433private: 1434 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) { 1435 // SSO is disabled during constant evaluation because `__is_long` isn't constexpr friendly 1436 return !__libcpp_is_constant_evaluated() && (__sz < __min_cap); 1437 } 1438 1439 template <class _ForwardIterator> 1440 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 1441 iterator __insert_from_safe_copy(size_type __n, size_type __ip, _ForwardIterator __first, _ForwardIterator __last) { 1442 size_type __sz = size(); 1443 size_type __cap = capacity(); 1444 value_type* __p; 1445 if (__cap - __sz >= __n) 1446 { 1447 __p = std::__to_address(__get_pointer()); 1448 size_type __n_move = __sz - __ip; 1449 if (__n_move != 0) 1450 traits_type::move(__p + __ip + __n, __p + __ip, __n_move); 1451 } 1452 else 1453 { 1454 __grow_by(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); 1455 __p = std::__to_address(__get_long_pointer()); 1456 } 1457 __sz += __n; 1458 __set_size(__sz); 1459 traits_type::assign(__p[__sz], value_type()); 1460 for (__p += __ip; __first != __last; ++__p, ++__first) 1461 traits_type::assign(*__p, *__first); 1462 1463 return begin() + __ip; 1464 } 1465 1466 _LIBCPP_HIDE_FROM_ABI allocator_type& __alloc() _NOEXCEPT { return __r_.second(); } 1467 _LIBCPP_HIDE_FROM_ABI const allocator_type& __alloc() const _NOEXCEPT { return __r_.second(); } 1468 1469#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 1470 1471 _LIBCPP_INLINE_VISIBILITY 1472 void __set_short_size(size_type __s) _NOEXCEPT 1473# ifdef _LIBCPP_BIG_ENDIAN 1474 {__r_.first().__s.__size_ = (unsigned char)(__s << 1);} 1475# else 1476 {__r_.first().__s.__size_ = (unsigned char)(__s);} 1477# endif 1478 1479 _LIBCPP_INLINE_VISIBILITY 1480 size_type __get_short_size() const _NOEXCEPT 1481# ifdef _LIBCPP_BIG_ENDIAN 1482 {return __r_.first().__s.__size_ >> 1;} 1483# else 1484 {return __r_.first().__s.__size_;} 1485# endif 1486 1487#else // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 1488 1489 _LIBCPP_INLINE_VISIBILITY 1490 void __set_short_size(size_type __s) _NOEXCEPT 1491# ifdef _LIBCPP_BIG_ENDIAN 1492 {__r_.first().__s.__size_ = (unsigned char)(__s);} 1493# else 1494 {__r_.first().__s.__size_ = (unsigned char)(__s << 1);} 1495# endif 1496 1497 _LIBCPP_INLINE_VISIBILITY 1498 size_type __get_short_size() const _NOEXCEPT 1499# ifdef _LIBCPP_BIG_ENDIAN 1500 {return __r_.first().__s.__size_;} 1501# else 1502 {return __r_.first().__s.__size_ >> 1;} 1503# endif 1504 1505#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 1506 1507 _LIBCPP_INLINE_VISIBILITY 1508 void __set_long_size(size_type __s) _NOEXCEPT 1509 {__r_.first().__l.__size_ = __s;} 1510 _LIBCPP_INLINE_VISIBILITY 1511 size_type __get_long_size() const _NOEXCEPT 1512 {return __r_.first().__l.__size_;} 1513 _LIBCPP_INLINE_VISIBILITY 1514 void __set_size(size_type __s) _NOEXCEPT 1515 {if (__is_long()) __set_long_size(__s); else __set_short_size(__s);} 1516 1517 _LIBCPP_INLINE_VISIBILITY 1518 void __set_long_cap(size_type __s) _NOEXCEPT 1519 {__r_.first().__l.__cap_ = __long_mask | __s;} 1520 _LIBCPP_INLINE_VISIBILITY 1521 size_type __get_long_cap() const _NOEXCEPT 1522 {return __r_.first().__l.__cap_ & size_type(~__long_mask);} 1523 1524 _LIBCPP_INLINE_VISIBILITY 1525 void __set_long_pointer(pointer __p) _NOEXCEPT 1526 {__r_.first().__l.__data_ = __p;} 1527 _LIBCPP_INLINE_VISIBILITY 1528 pointer __get_long_pointer() _NOEXCEPT 1529 {return __r_.first().__l.__data_;} 1530 _LIBCPP_INLINE_VISIBILITY 1531 const_pointer __get_long_pointer() const _NOEXCEPT 1532 {return __r_.first().__l.__data_;} 1533 _LIBCPP_INLINE_VISIBILITY 1534 pointer __get_short_pointer() _NOEXCEPT 1535 {return pointer_traits<pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1536 _LIBCPP_INLINE_VISIBILITY 1537 const_pointer __get_short_pointer() const _NOEXCEPT 1538 {return pointer_traits<const_pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1539 _LIBCPP_INLINE_VISIBILITY 1540 pointer __get_pointer() _NOEXCEPT 1541 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1542 _LIBCPP_INLINE_VISIBILITY 1543 const_pointer __get_pointer() const _NOEXCEPT 1544 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1545 1546 _LIBCPP_INLINE_VISIBILITY 1547 void __zero() _NOEXCEPT 1548 { 1549 size_type (&__a)[__n_words] = __r_.first().__r.__words; 1550 for (unsigned __i = 0; __i < __n_words; ++__i) 1551 __a[__i] = 0; 1552 } 1553 1554 template <size_type __a> static 1555 _LIBCPP_INLINE_VISIBILITY 1556 size_type __align_it(size_type __s) _NOEXCEPT 1557 {return (__s + (__a-1)) & ~(__a-1);} 1558 enum {__alignment = 16}; 1559 static _LIBCPP_INLINE_VISIBILITY 1560 size_type __recommend(size_type __s) _NOEXCEPT 1561 { 1562 if (__s < __min_cap) return static_cast<size_type>(__min_cap) - 1; 1563 size_type __guess = __align_it<sizeof(value_type) < __alignment ? 1564 __alignment/sizeof(value_type) : 1 > (__s+1) - 1; 1565 if (__guess == __min_cap) ++__guess; 1566 return __guess; 1567 } 1568 1569 inline 1570 void __init(const value_type* __s, size_type __sz, size_type __reserve); 1571 inline 1572 void __init(const value_type* __s, size_type __sz); 1573 inline 1574 void __init(size_type __n, value_type __c); 1575 1576 // Slow path for the (inlined) copy constructor for 'long' strings. 1577 // Always externally instantiated and not inlined. 1578 // Requires that __s is zero terminated. 1579 // The main reason for this function to exist is because for unstable, we 1580 // want to allow inlining of the copy constructor. However, we don't want 1581 // to call the __init() functions as those are marked as inline which may 1582 // result in over-aggressive inlining by the compiler, where our aim is 1583 // to only inline the fast path code directly in the ctor. 1584 void __init_copy_ctor_external(const value_type* __s, size_type __sz); 1585 1586 template <class _InputIterator> 1587 inline 1588 __enable_if_t 1589 < 1590 __is_exactly_cpp17_input_iterator<_InputIterator>::value 1591 > 1592 __init(_InputIterator __first, _InputIterator __last); 1593 1594 template <class _ForwardIterator> 1595 inline 1596 __enable_if_t 1597 < 1598 __is_cpp17_forward_iterator<_ForwardIterator>::value 1599 > 1600 __init(_ForwardIterator __first, _ForwardIterator __last); 1601 1602 void __grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 1603 size_type __n_copy, size_type __n_del, size_type __n_add = 0); 1604 void __grow_by_and_replace(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 1605 size_type __n_copy, size_type __n_del, 1606 size_type __n_add, const value_type* __p_new_stuff); 1607 1608 // __assign_no_alias is invoked for assignment operations where we 1609 // have proof that the input does not alias the current instance. 1610 // For example, operator=(basic_string) performs a 'self' check. 1611 template <bool __is_short> 1612 basic_string& __assign_no_alias(const value_type* __s, size_type __n); 1613 1614 _LIBCPP_INLINE_VISIBILITY 1615 void __erase_to_end(size_type __pos); 1616 1617 // __erase_external_with_move is invoked for erase() invocations where 1618 // `n ~= npos`, likely requiring memory moves on the string data. 1619 void __erase_external_with_move(size_type __pos, size_type __n); 1620 1621 _LIBCPP_INLINE_VISIBILITY 1622 void __copy_assign_alloc(const basic_string& __str) 1623 {__copy_assign_alloc(__str, integral_constant<bool, 1624 __alloc_traits::propagate_on_container_copy_assignment::value>());} 1625 1626 _LIBCPP_INLINE_VISIBILITY 1627 void __copy_assign_alloc(const basic_string& __str, true_type) 1628 { 1629 if (__alloc() == __str.__alloc()) 1630 __alloc() = __str.__alloc(); 1631 else 1632 { 1633 if (!__str.__is_long()) 1634 { 1635 __clear_and_shrink(); 1636 __alloc() = __str.__alloc(); 1637 } 1638 else 1639 { 1640 allocator_type __a = __str.__alloc(); 1641 pointer __p = __alloc_traits::allocate(__a, __str.__get_long_cap()); 1642 __clear_and_shrink(); 1643 __alloc() = _VSTD::move(__a); 1644 __set_long_pointer(__p); 1645 __set_long_cap(__str.__get_long_cap()); 1646 __set_long_size(__str.size()); 1647 } 1648 } 1649 } 1650 1651 _LIBCPP_INLINE_VISIBILITY 1652 void __copy_assign_alloc(const basic_string&, false_type) _NOEXCEPT 1653 {} 1654 1655#ifndef _LIBCPP_CXX03_LANG 1656 _LIBCPP_INLINE_VISIBILITY 1657 void __move_assign(basic_string& __str, false_type) 1658 _NOEXCEPT_(__alloc_traits::is_always_equal::value); 1659 _LIBCPP_INLINE_VISIBILITY 1660 void __move_assign(basic_string& __str, true_type) 1661#if _LIBCPP_STD_VER > 14 1662 _NOEXCEPT; 1663#else 1664 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value); 1665#endif 1666#endif 1667 1668 _LIBCPP_INLINE_VISIBILITY 1669 void 1670 __move_assign_alloc(basic_string& __str) 1671 _NOEXCEPT_( 1672 !__alloc_traits::propagate_on_container_move_assignment::value || 1673 is_nothrow_move_assignable<allocator_type>::value) 1674 {__move_assign_alloc(__str, integral_constant<bool, 1675 __alloc_traits::propagate_on_container_move_assignment::value>());} 1676 1677 _LIBCPP_INLINE_VISIBILITY 1678 void __move_assign_alloc(basic_string& __c, true_type) 1679 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 1680 { 1681 __alloc() = _VSTD::move(__c.__alloc()); 1682 } 1683 1684 _LIBCPP_INLINE_VISIBILITY 1685 void __move_assign_alloc(basic_string&, false_type) 1686 _NOEXCEPT 1687 {} 1688 1689 basic_string& __assign_external(const value_type* __s); 1690 basic_string& __assign_external(const value_type* __s, size_type __n); 1691 1692 // Assigns the value in __s, guaranteed to be __n < __min_cap in length. 1693 inline basic_string& __assign_short(const value_type* __s, size_type __n) { 1694 pointer __p = __is_long() 1695 ? (__set_long_size(__n), __get_long_pointer()) 1696 : (__set_short_size(__n), __get_short_pointer()); 1697 traits_type::move(_VSTD::__to_address(__p), __s, __n); 1698 traits_type::assign(__p[__n], value_type()); 1699 return *this; 1700 } 1701 1702 _LIBCPP_HIDE_FROM_ABI basic_string& __null_terminate_at(value_type* __p, size_type __newsz) { 1703 __set_size(__newsz); 1704 __invalidate_iterators_past(__newsz); 1705 traits_type::assign(__p[__newsz], value_type()); 1706 return *this; 1707 } 1708 1709 _LIBCPP_INLINE_VISIBILITY void __invalidate_all_iterators(); 1710 _LIBCPP_INLINE_VISIBILITY void __invalidate_iterators_past(size_type); 1711 1712 template<class _Tp> 1713 _LIBCPP_INLINE_VISIBILITY 1714 bool __addr_in_range(_Tp&& __t) const { 1715 const volatile void *__p = _VSTD::addressof(__t); 1716 return data() <= __p && __p <= data() + size(); 1717 } 1718 1719 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI 1720 void __throw_length_error() const { 1721 _VSTD::__throw_length_error("basic_string"); 1722 } 1723 1724 _LIBCPP_NORETURN _LIBCPP_HIDE_FROM_ABI 1725 void __throw_out_of_range() const { 1726 _VSTD::__throw_out_of_range("basic_string"); 1727 } 1728 1729 friend basic_string operator+<>(const basic_string&, const basic_string&); 1730 friend basic_string operator+<>(const value_type*, const basic_string&); 1731 friend basic_string operator+<>(value_type, const basic_string&); 1732 friend basic_string operator+<>(const basic_string&, const value_type*); 1733 friend basic_string operator+<>(const basic_string&, value_type); 1734}; 1735 1736// These declarations must appear before any functions are implicitly used 1737// so that they have the correct visibility specifier. 1738#ifdef _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 1739 _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, char) 1740# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 1741 _LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, wchar_t) 1742# endif 1743#else 1744 _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, char) 1745# ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 1746 _LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, wchar_t) 1747# endif 1748#endif 1749 1750 1751#if _LIBCPP_STD_VER >= 17 1752template<class _InputIterator, 1753 class _CharT = __iter_value_type<_InputIterator>, 1754 class _Allocator = allocator<_CharT>, 1755 class = enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value>, 1756 class = enable_if_t<__is_allocator<_Allocator>::value> 1757 > 1758basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator()) 1759 -> basic_string<_CharT, char_traits<_CharT>, _Allocator>; 1760 1761template<class _CharT, 1762 class _Traits, 1763 class _Allocator = allocator<_CharT>, 1764 class = enable_if_t<__is_allocator<_Allocator>::value> 1765 > 1766explicit basic_string(basic_string_view<_CharT, _Traits>, const _Allocator& = _Allocator()) 1767 -> basic_string<_CharT, _Traits, _Allocator>; 1768 1769template<class _CharT, 1770 class _Traits, 1771 class _Allocator = allocator<_CharT>, 1772 class = enable_if_t<__is_allocator<_Allocator>::value>, 1773 class _Sz = typename allocator_traits<_Allocator>::size_type 1774 > 1775basic_string(basic_string_view<_CharT, _Traits>, _Sz, _Sz, const _Allocator& = _Allocator()) 1776 -> basic_string<_CharT, _Traits, _Allocator>; 1777#endif 1778 1779template <class _CharT, class _Traits, class _Allocator> 1780inline 1781void 1782basic_string<_CharT, _Traits, _Allocator>::__invalidate_all_iterators() 1783{ 1784#if _LIBCPP_DEBUG_LEVEL == 2 1785 if (!__libcpp_is_constant_evaluated()) 1786 __get_db()->__invalidate_all(this); 1787#endif 1788} 1789 1790template <class _CharT, class _Traits, class _Allocator> 1791inline 1792void 1793basic_string<_CharT, _Traits, _Allocator>::__invalidate_iterators_past(size_type __pos) 1794{ 1795#if _LIBCPP_DEBUG_LEVEL == 2 1796 if (!__libcpp_is_constant_evaluated()) { 1797 __c_node* __c = __get_db()->__find_c_and_lock(this); 1798 if (__c) 1799 { 1800 const_pointer __new_last = __get_pointer() + __pos; 1801 for (__i_node** __p = __c->end_; __p != __c->beg_; ) 1802 { 1803 --__p; 1804 const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_); 1805 if (__i->base() > __new_last) 1806 { 1807 (*__p)->__c_ = nullptr; 1808 if (--__c->end_ != __p) 1809 _VSTD::memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*)); 1810 } 1811 } 1812 __get_db()->unlock(); 1813 } 1814 } 1815#else 1816 (void)__pos; 1817#endif // _LIBCPP_DEBUG_LEVEL == 2 1818} 1819 1820template <class _CharT, class _Traits, class _Allocator> 1821inline 1822basic_string<_CharT, _Traits, _Allocator>::basic_string() 1823 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value) 1824 : __r_(__default_init_tag(), __default_init_tag()) 1825{ 1826 _VSTD::__debug_db_insert_c(this); 1827 __zero(); 1828} 1829 1830template <class _CharT, class _Traits, class _Allocator> 1831inline 1832basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __a) 1833#if _LIBCPP_STD_VER <= 14 1834 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value) 1835#else 1836 _NOEXCEPT 1837#endif 1838: __r_(__default_init_tag(), __a) 1839{ 1840 _VSTD::__debug_db_insert_c(this); 1841 __zero(); 1842} 1843 1844template <class _CharT, class _Traits, class _Allocator> 1845void basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, 1846 size_type __sz, 1847 size_type __reserve) 1848{ 1849 if (__reserve > max_size()) 1850 __throw_length_error(); 1851 pointer __p; 1852 if (__fits_in_sso(__reserve)) 1853 { 1854 __set_short_size(__sz); 1855 __p = __get_short_pointer(); 1856 } 1857 else 1858 { 1859 size_type __cap = __recommend(__reserve); 1860 __p = __alloc_traits::allocate(__alloc(), __cap+1); 1861 __set_long_pointer(__p); 1862 __set_long_cap(__cap+1); 1863 __set_long_size(__sz); 1864 } 1865 traits_type::copy(_VSTD::__to_address(__p), __s, __sz); 1866 traits_type::assign(__p[__sz], value_type()); 1867} 1868 1869template <class _CharT, class _Traits, class _Allocator> 1870void 1871basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz) 1872{ 1873 if (__sz > max_size()) 1874 __throw_length_error(); 1875 pointer __p; 1876 if (__fits_in_sso(__sz)) 1877 { 1878 __set_short_size(__sz); 1879 __p = __get_short_pointer(); 1880 } 1881 else 1882 { 1883 size_type __cap = __recommend(__sz); 1884 __p = __alloc_traits::allocate(__alloc(), __cap+1); 1885 __set_long_pointer(__p); 1886 __set_long_cap(__cap+1); 1887 __set_long_size(__sz); 1888 } 1889 traits_type::copy(_VSTD::__to_address(__p), __s, __sz); 1890 traits_type::assign(__p[__sz], value_type()); 1891} 1892 1893template <class _CharT, class _Traits, class _Allocator> 1894template <class> 1895basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, const _Allocator& __a) 1896 : __r_(__default_init_tag(), __a) 1897{ 1898 _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); 1899 __init(__s, traits_type::length(__s)); 1900 _VSTD::__debug_db_insert_c(this); 1901} 1902 1903template <class _CharT, class _Traits, class _Allocator> 1904inline 1905basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, size_type __n) 1906 : __r_(__default_init_tag(), __default_init_tag()) 1907{ 1908 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); 1909 __init(__s, __n); 1910 _VSTD::__debug_db_insert_c(this); 1911} 1912 1913template <class _CharT, class _Traits, class _Allocator> 1914inline 1915basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, size_type __n, const _Allocator& __a) 1916 : __r_(__default_init_tag(), __a) 1917{ 1918 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n, allocator) detected nullptr"); 1919 __init(__s, __n); 1920 _VSTD::__debug_db_insert_c(this); 1921} 1922 1923template <class _CharT, class _Traits, class _Allocator> 1924basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __str) 1925 : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) 1926{ 1927 if (!__str.__is_long()) 1928 __r_.first().__r = __str.__r_.first().__r; 1929 else 1930 __init_copy_ctor_external(_VSTD::__to_address(__str.__get_long_pointer()), 1931 __str.__get_long_size()); 1932 _VSTD::__debug_db_insert_c(this); 1933} 1934 1935template <class _CharT, class _Traits, class _Allocator> 1936basic_string<_CharT, _Traits, _Allocator>::basic_string( 1937 const basic_string& __str, const allocator_type& __a) 1938 : __r_(__default_init_tag(), __a) 1939{ 1940 if (!__str.__is_long()) 1941 __r_.first().__r = __str.__r_.first().__r; 1942 else 1943 __init_copy_ctor_external(_VSTD::__to_address(__str.__get_long_pointer()), 1944 __str.__get_long_size()); 1945 _VSTD::__debug_db_insert_c(this); 1946} 1947 1948template <class _CharT, class _Traits, class _Allocator> 1949void basic_string<_CharT, _Traits, _Allocator>::__init_copy_ctor_external( 1950 const value_type* __s, size_type __sz) { 1951 pointer __p; 1952 if (__fits_in_sso(__sz)) { 1953 __p = __get_short_pointer(); 1954 __set_short_size(__sz); 1955 } else { 1956 if (__sz > max_size()) 1957 __throw_length_error(); 1958 size_t __cap = __recommend(__sz); 1959 __p = __alloc_traits::allocate(__alloc(), __cap + 1); 1960 __set_long_pointer(__p); 1961 __set_long_cap(__cap + 1); 1962 __set_long_size(__sz); 1963 } 1964 traits_type::copy(_VSTD::__to_address(__p), __s, __sz + 1); 1965} 1966 1967#ifndef _LIBCPP_CXX03_LANG 1968 1969template <class _CharT, class _Traits, class _Allocator> 1970inline 1971basic_string<_CharT, _Traits, _Allocator>::basic_string(basic_string&& __str) 1972#if _LIBCPP_STD_VER <= 14 1973 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value) 1974#else 1975 _NOEXCEPT 1976#endif 1977 : __r_(_VSTD::move(__str.__r_)) 1978{ 1979 __str.__zero(); 1980 _VSTD::__debug_db_insert_c(this); 1981#if _LIBCPP_DEBUG_LEVEL == 2 1982 if (!__libcpp_is_constant_evaluated() && __is_long()) 1983 __get_db()->swap(this, &__str); 1984#endif 1985} 1986 1987template <class _CharT, class _Traits, class _Allocator> 1988inline 1989basic_string<_CharT, _Traits, _Allocator>::basic_string(basic_string&& __str, const allocator_type& __a) 1990 : __r_(__default_init_tag(), __a) 1991{ 1992 if (__str.__is_long() && __a != __str.__alloc()) // copy, not move 1993 __init(_VSTD::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1994 else 1995 { 1996 __r_.first().__r = __str.__r_.first().__r; 1997 __str.__zero(); 1998 } 1999 _VSTD::__debug_db_insert_c(this); 2000#if _LIBCPP_DEBUG_LEVEL == 2 2001 if (!__libcpp_is_constant_evaluated() && __is_long()) 2002 __get_db()->swap(this, &__str); 2003#endif 2004} 2005 2006#endif // _LIBCPP_CXX03_LANG 2007 2008template <class _CharT, class _Traits, class _Allocator> 2009void 2010basic_string<_CharT, _Traits, _Allocator>::__init(size_type __n, value_type __c) 2011{ 2012 if (__n > max_size()) 2013 __throw_length_error(); 2014 pointer __p; 2015 if (__fits_in_sso(__n)) 2016 { 2017 __set_short_size(__n); 2018 __p = __get_short_pointer(); 2019 } 2020 else 2021 { 2022 size_type __cap = __recommend(__n); 2023 __p = __alloc_traits::allocate(__alloc(), __cap+1); 2024 __set_long_pointer(__p); 2025 __set_long_cap(__cap+1); 2026 __set_long_size(__n); 2027 } 2028 traits_type::assign(_VSTD::__to_address(__p), __n, __c); 2029 traits_type::assign(__p[__n], value_type()); 2030} 2031 2032template <class _CharT, class _Traits, class _Allocator> 2033inline 2034basic_string<_CharT, _Traits, _Allocator>::basic_string(size_type __n, _CharT __c) 2035 : __r_(__default_init_tag(), __default_init_tag()) 2036{ 2037 __init(__n, __c); 2038 _VSTD::__debug_db_insert_c(this); 2039} 2040 2041template <class _CharT, class _Traits, class _Allocator> 2042template <class> 2043basic_string<_CharT, _Traits, _Allocator>::basic_string(size_type __n, _CharT __c, const _Allocator& __a) 2044 : __r_(__default_init_tag(), __a) 2045{ 2046 __init(__n, __c); 2047 _VSTD::__debug_db_insert_c(this); 2048} 2049 2050template <class _CharT, class _Traits, class _Allocator> 2051basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __str, 2052 size_type __pos, size_type __n, 2053 const _Allocator& __a) 2054 : __r_(__default_init_tag(), __a) 2055{ 2056 size_type __str_sz = __str.size(); 2057 if (__pos > __str_sz) 2058 __throw_out_of_range(); 2059 __init(__str.data() + __pos, _VSTD::min(__n, __str_sz - __pos)); 2060 _VSTD::__debug_db_insert_c(this); 2061} 2062 2063template <class _CharT, class _Traits, class _Allocator> 2064inline 2065basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __str, size_type __pos, 2066 const _Allocator& __a) 2067 : __r_(__default_init_tag(), __a) 2068{ 2069 size_type __str_sz = __str.size(); 2070 if (__pos > __str_sz) 2071 __throw_out_of_range(); 2072 __init(__str.data() + __pos, __str_sz - __pos); 2073 _VSTD::__debug_db_insert_c(this); 2074} 2075 2076template <class _CharT, class _Traits, class _Allocator> 2077template <class _Tp, class> 2078basic_string<_CharT, _Traits, _Allocator>::basic_string( 2079 const _Tp& __t, size_type __pos, size_type __n, const allocator_type& __a) 2080 : __r_(__default_init_tag(), __a) 2081{ 2082 __self_view __sv0 = __t; 2083 __self_view __sv = __sv0.substr(__pos, __n); 2084 __init(__sv.data(), __sv.size()); 2085 _VSTD::__debug_db_insert_c(this); 2086} 2087 2088template <class _CharT, class _Traits, class _Allocator> 2089template <class _Tp, class> 2090basic_string<_CharT, _Traits, _Allocator>::basic_string(const _Tp & __t) 2091 : __r_(__default_init_tag(), __default_init_tag()) 2092{ 2093 __self_view __sv = __t; 2094 __init(__sv.data(), __sv.size()); 2095 _VSTD::__debug_db_insert_c(this); 2096} 2097 2098template <class _CharT, class _Traits, class _Allocator> 2099template <class _Tp, class> 2100basic_string<_CharT, _Traits, _Allocator>::basic_string(const _Tp & __t, const _Allocator& __a) 2101 : __r_(__default_init_tag(), __a) 2102{ 2103 __self_view __sv = __t; 2104 __init(__sv.data(), __sv.size()); 2105 _VSTD::__debug_db_insert_c(this); 2106} 2107 2108template <class _CharT, class _Traits, class _Allocator> 2109template <class _InputIterator> 2110__enable_if_t 2111< 2112 __is_exactly_cpp17_input_iterator<_InputIterator>::value 2113> 2114basic_string<_CharT, _Traits, _Allocator>::__init(_InputIterator __first, _InputIterator __last) 2115{ 2116 __zero(); 2117#ifndef _LIBCPP_NO_EXCEPTIONS 2118 try 2119 { 2120#endif // _LIBCPP_NO_EXCEPTIONS 2121 for (; __first != __last; ++__first) 2122 push_back(*__first); 2123#ifndef _LIBCPP_NO_EXCEPTIONS 2124 } 2125 catch (...) 2126 { 2127 if (__is_long()) 2128 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2129 throw; 2130 } 2131#endif // _LIBCPP_NO_EXCEPTIONS 2132} 2133 2134template <class _CharT, class _Traits, class _Allocator> 2135template <class _ForwardIterator> 2136__enable_if_t 2137< 2138 __is_cpp17_forward_iterator<_ForwardIterator>::value 2139> 2140basic_string<_CharT, _Traits, _Allocator>::__init(_ForwardIterator __first, _ForwardIterator __last) 2141{ 2142 size_type __sz = static_cast<size_type>(_VSTD::distance(__first, __last)); 2143 if (__sz > max_size()) 2144 __throw_length_error(); 2145 pointer __p; 2146 if (__fits_in_sso(__sz)) 2147 { 2148 __set_short_size(__sz); 2149 __p = __get_short_pointer(); 2150 } 2151 else 2152 { 2153 size_type __cap = __recommend(__sz); 2154 __p = __alloc_traits::allocate(__alloc(), __cap+1); 2155 __set_long_pointer(__p); 2156 __set_long_cap(__cap+1); 2157 __set_long_size(__sz); 2158 } 2159 2160#ifndef _LIBCPP_NO_EXCEPTIONS 2161 try 2162 { 2163#endif // _LIBCPP_NO_EXCEPTIONS 2164 for (; __first != __last; ++__first, (void) ++__p) 2165 traits_type::assign(*__p, *__first); 2166 traits_type::assign(*__p, value_type()); 2167#ifndef _LIBCPP_NO_EXCEPTIONS 2168 } 2169 catch (...) 2170 { 2171 if (__is_long()) 2172 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2173 throw; 2174 } 2175#endif // _LIBCPP_NO_EXCEPTIONS 2176} 2177 2178template <class _CharT, class _Traits, class _Allocator> 2179template<class _InputIterator, class> 2180inline 2181basic_string<_CharT, _Traits, _Allocator>::basic_string(_InputIterator __first, _InputIterator __last) 2182 : __r_(__default_init_tag(), __default_init_tag()) 2183{ 2184 __init(__first, __last); 2185 _VSTD::__debug_db_insert_c(this); 2186} 2187 2188template <class _CharT, class _Traits, class _Allocator> 2189template<class _InputIterator, class> 2190inline 2191basic_string<_CharT, _Traits, _Allocator>::basic_string(_InputIterator __first, _InputIterator __last, 2192 const allocator_type& __a) 2193 : __r_(__default_init_tag(), __a) 2194{ 2195 __init(__first, __last); 2196 _VSTD::__debug_db_insert_c(this); 2197} 2198 2199#ifndef _LIBCPP_CXX03_LANG 2200 2201template <class _CharT, class _Traits, class _Allocator> 2202inline 2203basic_string<_CharT, _Traits, _Allocator>::basic_string( 2204 initializer_list<_CharT> __il) 2205 : __r_(__default_init_tag(), __default_init_tag()) 2206{ 2207 __init(__il.begin(), __il.end()); 2208 _VSTD::__debug_db_insert_c(this); 2209} 2210 2211template <class _CharT, class _Traits, class _Allocator> 2212inline 2213 2214basic_string<_CharT, _Traits, _Allocator>::basic_string( 2215 initializer_list<_CharT> __il, const _Allocator& __a) 2216 : __r_(__default_init_tag(), __a) 2217{ 2218 __init(__il.begin(), __il.end()); 2219 _VSTD::__debug_db_insert_c(this); 2220} 2221 2222#endif // _LIBCPP_CXX03_LANG 2223 2224template <class _CharT, class _Traits, class _Allocator> 2225basic_string<_CharT, _Traits, _Allocator>::~basic_string() 2226{ 2227#if _LIBCPP_DEBUG_LEVEL == 2 2228 if (!__libcpp_is_constant_evaluated()) 2229 __get_db()->__erase_c(this); 2230#endif 2231 if (__is_long()) 2232 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2233} 2234 2235template <class _CharT, class _Traits, class _Allocator> 2236void 2237basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace 2238 (size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2239 size_type __n_copy, size_type __n_del, size_type __n_add, const value_type* __p_new_stuff) 2240{ 2241 size_type __ms = max_size(); 2242 if (__delta_cap > __ms - __old_cap - 1) 2243 __throw_length_error(); 2244 pointer __old_p = __get_pointer(); 2245 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2246 __recommend(_VSTD::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2247 __ms - 1; 2248 pointer __p = __alloc_traits::allocate(__alloc(), __cap+1); 2249 __invalidate_all_iterators(); 2250 if (__n_copy != 0) 2251 traits_type::copy(_VSTD::__to_address(__p), 2252 _VSTD::__to_address(__old_p), __n_copy); 2253 if (__n_add != 0) 2254 traits_type::copy(_VSTD::__to_address(__p) + __n_copy, __p_new_stuff, __n_add); 2255 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2256 if (__sec_cp_sz != 0) 2257 traits_type::copy(_VSTD::__to_address(__p) + __n_copy + __n_add, 2258 _VSTD::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2259 if (__old_cap+1 != __min_cap) 2260 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1); 2261 __set_long_pointer(__p); 2262 __set_long_cap(__cap+1); 2263 __old_sz = __n_copy + __n_add + __sec_cp_sz; 2264 __set_long_size(__old_sz); 2265 traits_type::assign(__p[__old_sz], value_type()); 2266} 2267 2268template <class _CharT, class _Traits, class _Allocator> 2269void 2270basic_string<_CharT, _Traits, _Allocator>::__grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2271 size_type __n_copy, size_type __n_del, size_type __n_add) 2272{ 2273 size_type __ms = max_size(); 2274 if (__delta_cap > __ms - __old_cap) 2275 __throw_length_error(); 2276 pointer __old_p = __get_pointer(); 2277 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2278 __recommend(_VSTD::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2279 __ms - 1; 2280 pointer __p = __alloc_traits::allocate(__alloc(), __cap+1); 2281 __invalidate_all_iterators(); 2282 if (__n_copy != 0) 2283 traits_type::copy(_VSTD::__to_address(__p), 2284 _VSTD::__to_address(__old_p), __n_copy); 2285 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2286 if (__sec_cp_sz != 0) 2287 traits_type::copy(_VSTD::__to_address(__p) + __n_copy + __n_add, 2288 _VSTD::__to_address(__old_p) + __n_copy + __n_del, 2289 __sec_cp_sz); 2290 if (__old_cap+1 != __min_cap) 2291 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1); 2292 __set_long_pointer(__p); 2293 __set_long_cap(__cap+1); 2294} 2295 2296// assign 2297 2298template <class _CharT, class _Traits, class _Allocator> 2299template <bool __is_short> 2300basic_string<_CharT, _Traits, _Allocator>& 2301basic_string<_CharT, _Traits, _Allocator>::__assign_no_alias( 2302 const value_type* __s, size_type __n) { 2303 size_type __cap = __is_short ? __min_cap : __get_long_cap(); 2304 if (__n < __cap) { 2305 pointer __p = __is_short ? __get_short_pointer() : __get_long_pointer(); 2306 __is_short ? __set_short_size(__n) : __set_long_size(__n); 2307 traits_type::copy(_VSTD::__to_address(__p), __s, __n); 2308 traits_type::assign(__p[__n], value_type()); 2309 __invalidate_iterators_past(__n); 2310 } else { 2311 size_type __sz = __is_short ? __get_short_size() : __get_long_size(); 2312 __grow_by_and_replace(__cap - 1, __n - __cap + 1, __sz, 0, __sz, __n, __s); 2313 } 2314 return *this; 2315} 2316 2317template <class _CharT, class _Traits, class _Allocator> 2318basic_string<_CharT, _Traits, _Allocator>& 2319basic_string<_CharT, _Traits, _Allocator>::__assign_external( 2320 const value_type* __s, size_type __n) { 2321 size_type __cap = capacity(); 2322 if (__cap >= __n) { 2323 value_type* __p = _VSTD::__to_address(__get_pointer()); 2324 traits_type::move(__p, __s, __n); 2325 return __null_terminate_at(__p, __n); 2326 } else { 2327 size_type __sz = size(); 2328 __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); 2329 return *this; 2330 } 2331} 2332 2333template <class _CharT, class _Traits, class _Allocator> 2334basic_string<_CharT, _Traits, _Allocator>& 2335basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s, size_type __n) 2336{ 2337 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::assign received nullptr"); 2338 return (__builtin_constant_p(__n) && __fits_in_sso(__n)) 2339 ? __assign_short(__s, __n) 2340 : __assign_external(__s, __n); 2341} 2342 2343template <class _CharT, class _Traits, class _Allocator> 2344basic_string<_CharT, _Traits, _Allocator>& 2345basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) 2346{ 2347 size_type __cap = capacity(); 2348 if (__cap < __n) 2349 { 2350 size_type __sz = size(); 2351 __grow_by(__cap, __n - __cap, __sz, 0, __sz); 2352 } 2353 value_type* __p = _VSTD::__to_address(__get_pointer()); 2354 traits_type::assign(__p, __n, __c); 2355 return __null_terminate_at(__p, __n); 2356} 2357 2358template <class _CharT, class _Traits, class _Allocator> 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> 2380basic_string<_CharT, _Traits, _Allocator>& 2381basic_string<_CharT, _Traits, _Allocator>::operator=(const basic_string& __str) 2382{ 2383 if (this != &__str) { 2384 __copy_assign_alloc(__str); 2385 if (!__is_long()) { 2386 if (!__str.__is_long()) { 2387 __r_.first().__r = __str.__r_.first().__r; 2388 } else { 2389 return __assign_no_alias<true>(__str.data(), __str.size()); 2390 } 2391 } else { 2392 return __assign_no_alias<false>(__str.data(), __str.size()); 2393 } 2394 } 2395 return *this; 2396} 2397 2398#ifndef _LIBCPP_CXX03_LANG 2399 2400template <class _CharT, class _Traits, class _Allocator> 2401inline 2402void 2403basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, false_type) 2404 _NOEXCEPT_(__alloc_traits::is_always_equal::value) 2405{ 2406 if (__alloc() != __str.__alloc()) 2407 assign(__str); 2408 else 2409 __move_assign(__str, true_type()); 2410} 2411 2412template <class _CharT, class _Traits, class _Allocator> 2413inline 2414void 2415basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type) 2416#if _LIBCPP_STD_VER > 14 2417 _NOEXCEPT 2418#else 2419 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 2420#endif 2421{ 2422 if (__is_long()) { 2423 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), 2424 __get_long_cap()); 2425#if _LIBCPP_STD_VER <= 14 2426 if (!is_nothrow_move_assignable<allocator_type>::value) { 2427 __set_short_size(0); 2428 traits_type::assign(__get_short_pointer()[0], value_type()); 2429 } 2430#endif 2431 } 2432 __move_assign_alloc(__str); 2433 __r_.first() = __str.__r_.first(); 2434 __str.__set_short_size(0); 2435 traits_type::assign(__str.__get_short_pointer()[0], value_type()); 2436} 2437 2438template <class _CharT, class _Traits, class _Allocator> 2439inline 2440basic_string<_CharT, _Traits, _Allocator>& 2441basic_string<_CharT, _Traits, _Allocator>::operator=(basic_string&& __str) 2442 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) 2443{ 2444 __move_assign(__str, integral_constant<bool, 2445 __alloc_traits::propagate_on_container_move_assignment::value>()); 2446 return *this; 2447} 2448 2449#endif 2450 2451template <class _CharT, class _Traits, class _Allocator> 2452template<class _InputIterator> 2453__enable_if_t 2454< 2455 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 2456 basic_string<_CharT, _Traits, _Allocator>& 2457> 2458basic_string<_CharT, _Traits, _Allocator>::assign(_InputIterator __first, _InputIterator __last) 2459{ 2460 const basic_string __temp(__first, __last, __alloc()); 2461 assign(__temp.data(), __temp.size()); 2462 return *this; 2463} 2464 2465template <class _CharT, class _Traits, class _Allocator> 2466template<class _ForwardIterator> 2467__enable_if_t 2468< 2469 __is_cpp17_forward_iterator<_ForwardIterator>::value, 2470 basic_string<_CharT, _Traits, _Allocator>& 2471> 2472basic_string<_CharT, _Traits, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last) 2473{ 2474 size_type __cap = capacity(); 2475 size_type __n = __string_is_trivial_iterator<_ForwardIterator>::value ? 2476 static_cast<size_type>(_VSTD::distance(__first, __last)) : 0; 2477 2478 if (__string_is_trivial_iterator<_ForwardIterator>::value && 2479 (__cap >= __n || !__addr_in_range(*__first))) 2480 { 2481 if (__cap < __n) 2482 { 2483 size_type __sz = size(); 2484 __grow_by(__cap, __n - __cap, __sz, 0, __sz); 2485 } 2486 pointer __p = __get_pointer(); 2487 for (; __first != __last; ++__p, (void) ++__first) 2488 traits_type::assign(*__p, *__first); 2489 traits_type::assign(*__p, value_type()); 2490 __set_size(__n); 2491 __invalidate_iterators_past(__n); 2492 } 2493 else 2494 { 2495 const basic_string __temp(__first, __last, __alloc()); 2496 assign(__temp.data(), __temp.size()); 2497 } 2498 return *this; 2499} 2500 2501template <class _CharT, class _Traits, class _Allocator> 2502basic_string<_CharT, _Traits, _Allocator>& 2503basic_string<_CharT, _Traits, _Allocator>::assign(const basic_string& __str, size_type __pos, size_type __n) 2504{ 2505 size_type __sz = __str.size(); 2506 if (__pos > __sz) 2507 __throw_out_of_range(); 2508 return assign(__str.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2509} 2510 2511template <class _CharT, class _Traits, class _Allocator> 2512template <class _Tp> 2513__enable_if_t 2514< 2515 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 2516 && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2517 basic_string<_CharT, _Traits, _Allocator>& 2518> 2519basic_string<_CharT, _Traits, _Allocator>::assign(const _Tp & __t, size_type __pos, size_type __n) 2520{ 2521 __self_view __sv = __t; 2522 size_type __sz = __sv.size(); 2523 if (__pos > __sz) 2524 __throw_out_of_range(); 2525 return assign(__sv.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2526} 2527 2528 2529template <class _CharT, class _Traits, class _Allocator> 2530basic_string<_CharT, _Traits, _Allocator>& 2531basic_string<_CharT, _Traits, _Allocator>::__assign_external(const value_type* __s) { 2532 return __assign_external(__s, traits_type::length(__s)); 2533} 2534 2535template <class _CharT, class _Traits, class _Allocator> 2536basic_string<_CharT, _Traits, _Allocator>& 2537basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s) 2538{ 2539 _LIBCPP_ASSERT(__s != nullptr, "string::assign received nullptr"); 2540 return __builtin_constant_p(*__s) 2541 ? (__fits_in_sso(traits_type::length(__s)) 2542 ? __assign_short(__s, traits_type::length(__s)) 2543 : __assign_external(__s, traits_type::length(__s))) 2544 : __assign_external(__s); 2545} 2546// append 2547 2548template <class _CharT, class _Traits, class _Allocator> 2549basic_string<_CharT, _Traits, _Allocator>& 2550basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s, size_type __n) 2551{ 2552 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::append received nullptr"); 2553 size_type __cap = capacity(); 2554 size_type __sz = size(); 2555 if (__cap - __sz >= __n) 2556 { 2557 if (__n) 2558 { 2559 value_type* __p = _VSTD::__to_address(__get_pointer()); 2560 traits_type::copy(__p + __sz, __s, __n); 2561 __sz += __n; 2562 __set_size(__sz); 2563 traits_type::assign(__p[__sz], value_type()); 2564 } 2565 } 2566 else 2567 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __sz, 0, __n, __s); 2568 return *this; 2569} 2570 2571template <class _CharT, class _Traits, class _Allocator> 2572basic_string<_CharT, _Traits, _Allocator>& 2573basic_string<_CharT, _Traits, _Allocator>::append(size_type __n, value_type __c) 2574{ 2575 if (__n) 2576 { 2577 size_type __cap = capacity(); 2578 size_type __sz = size(); 2579 if (__cap - __sz < __n) 2580 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2581 pointer __p = __get_pointer(); 2582 traits_type::assign(_VSTD::__to_address(__p) + __sz, __n, __c); 2583 __sz += __n; 2584 __set_size(__sz); 2585 traits_type::assign(__p[__sz], value_type()); 2586 } 2587 return *this; 2588} 2589 2590template <class _CharT, class _Traits, class _Allocator> 2591inline void 2592basic_string<_CharT, _Traits, _Allocator>::__append_default_init(size_type __n) 2593{ 2594 if (__n) 2595 { 2596 size_type __cap = capacity(); 2597 size_type __sz = size(); 2598 if (__cap - __sz < __n) 2599 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2600 pointer __p = __get_pointer(); 2601 __sz += __n; 2602 __set_size(__sz); 2603 traits_type::assign(__p[__sz], value_type()); 2604 } 2605} 2606 2607template <class _CharT, class _Traits, class _Allocator> 2608void 2609basic_string<_CharT, _Traits, _Allocator>::push_back(value_type __c) 2610{ 2611 bool __is_short = !__is_long(); 2612 size_type __cap; 2613 size_type __sz; 2614 if (__is_short) 2615 { 2616 __cap = __min_cap - 1; 2617 __sz = __get_short_size(); 2618 } 2619 else 2620 { 2621 __cap = __get_long_cap() - 1; 2622 __sz = __get_long_size(); 2623 } 2624 if (__sz == __cap) 2625 { 2626 __grow_by(__cap, 1, __sz, __sz, 0); 2627 __is_short = false; // the string is always long after __grow_by 2628 } 2629 pointer __p; 2630 if (__is_short) 2631 { 2632 __p = __get_short_pointer() + __sz; 2633 __set_short_size(__sz+1); 2634 } 2635 else 2636 { 2637 __p = __get_long_pointer() + __sz; 2638 __set_long_size(__sz+1); 2639 } 2640 traits_type::assign(*__p, __c); 2641 traits_type::assign(*++__p, value_type()); 2642} 2643 2644template <class _CharT, class _Traits, class _Allocator> 2645template<class _ForwardIterator> 2646__enable_if_t 2647< 2648 __is_cpp17_forward_iterator<_ForwardIterator>::value, 2649 basic_string<_CharT, _Traits, _Allocator>& 2650> 2651basic_string<_CharT, _Traits, _Allocator>::append( 2652 _ForwardIterator __first, _ForwardIterator __last) 2653{ 2654 size_type __sz = size(); 2655 size_type __cap = capacity(); 2656 size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last)); 2657 if (__n) 2658 { 2659 if (__string_is_trivial_iterator<_ForwardIterator>::value && 2660 !__addr_in_range(*__first)) 2661 { 2662 if (__cap - __sz < __n) 2663 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2664 pointer __p = __get_pointer() + __sz; 2665 for (; __first != __last; ++__p, (void) ++__first) 2666 traits_type::assign(*__p, *__first); 2667 traits_type::assign(*__p, value_type()); 2668 __set_size(__sz + __n); 2669 } 2670 else 2671 { 2672 const basic_string __temp(__first, __last, __alloc()); 2673 append(__temp.data(), __temp.size()); 2674 } 2675 } 2676 return *this; 2677} 2678 2679template <class _CharT, class _Traits, class _Allocator> 2680inline 2681basic_string<_CharT, _Traits, _Allocator>& 2682basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str) 2683{ 2684 return append(__str.data(), __str.size()); 2685} 2686 2687template <class _CharT, class _Traits, class _Allocator> 2688basic_string<_CharT, _Traits, _Allocator>& 2689basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str, size_type __pos, size_type __n) 2690{ 2691 size_type __sz = __str.size(); 2692 if (__pos > __sz) 2693 __throw_out_of_range(); 2694 return append(__str.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2695} 2696 2697template <class _CharT, class _Traits, class _Allocator> 2698template <class _Tp> 2699 __enable_if_t 2700 < 2701 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2702 basic_string<_CharT, _Traits, _Allocator>& 2703 > 2704basic_string<_CharT, _Traits, _Allocator>::append(const _Tp & __t, size_type __pos, size_type __n) 2705{ 2706 __self_view __sv = __t; 2707 size_type __sz = __sv.size(); 2708 if (__pos > __sz) 2709 __throw_out_of_range(); 2710 return append(__sv.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2711} 2712 2713template <class _CharT, class _Traits, class _Allocator> 2714basic_string<_CharT, _Traits, _Allocator>& 2715basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s) 2716{ 2717 _LIBCPP_ASSERT(__s != nullptr, "string::append received nullptr"); 2718 return append(__s, traits_type::length(__s)); 2719} 2720 2721// insert 2722 2723template <class _CharT, class _Traits, class _Allocator> 2724basic_string<_CharT, _Traits, _Allocator>& 2725basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s, size_type __n) 2726{ 2727 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::insert received nullptr"); 2728 size_type __sz = size(); 2729 if (__pos > __sz) 2730 __throw_out_of_range(); 2731 size_type __cap = capacity(); 2732 if (__cap - __sz >= __n) 2733 { 2734 if (__n) 2735 { 2736 value_type* __p = _VSTD::__to_address(__get_pointer()); 2737 size_type __n_move = __sz - __pos; 2738 if (__n_move != 0) 2739 { 2740 if (__p + __pos <= __s && __s < __p + __sz) 2741 __s += __n; 2742 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 2743 } 2744 traits_type::move(__p + __pos, __s, __n); 2745 __sz += __n; 2746 __set_size(__sz); 2747 traits_type::assign(__p[__sz], value_type()); 2748 } 2749 } 2750 else 2751 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); 2752 return *this; 2753} 2754 2755template <class _CharT, class _Traits, class _Allocator> 2756basic_string<_CharT, _Traits, _Allocator>& 2757basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, size_type __n, value_type __c) 2758{ 2759 size_type __sz = size(); 2760 if (__pos > __sz) 2761 __throw_out_of_range(); 2762 if (__n) 2763 { 2764 size_type __cap = capacity(); 2765 value_type* __p; 2766 if (__cap - __sz >= __n) 2767 { 2768 __p = _VSTD::__to_address(__get_pointer()); 2769 size_type __n_move = __sz - __pos; 2770 if (__n_move != 0) 2771 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 2772 } 2773 else 2774 { 2775 __grow_by(__cap, __sz + __n - __cap, __sz, __pos, 0, __n); 2776 __p = _VSTD::__to_address(__get_long_pointer()); 2777 } 2778 traits_type::assign(__p + __pos, __n, __c); 2779 __sz += __n; 2780 __set_size(__sz); 2781 traits_type::assign(__p[__sz], value_type()); 2782 } 2783 return *this; 2784} 2785 2786template <class _CharT, class _Traits, class _Allocator> 2787template<class _InputIterator> 2788__enable_if_t 2789< 2790 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 2791 typename basic_string<_CharT, _Traits, _Allocator>::iterator 2792> 2793basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) 2794{ 2795 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2796 "string::insert(iterator, range) called with an iterator not" 2797 " referring to this string"); 2798 const basic_string __temp(__first, __last, __alloc()); 2799 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 2800} 2801 2802template <class _CharT, class _Traits, class _Allocator> 2803template<class _ForwardIterator> 2804__enable_if_t 2805< 2806 __is_cpp17_forward_iterator<_ForwardIterator>::value, 2807 typename basic_string<_CharT, _Traits, _Allocator>::iterator 2808> 2809basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) 2810{ 2811 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2812 "string::insert(iterator, range) called with an iterator not referring to this string"); 2813 2814 size_type __ip = static_cast<size_type>(__pos - begin()); 2815 size_type __n = static_cast<size_type>(std::distance(__first, __last)); 2816 if (__n == 0) 2817 return begin() + __ip; 2818 2819 if (__string_is_trivial_iterator<_ForwardIterator>::value && !__addr_in_range(*__first)) 2820 { 2821 return __insert_from_safe_copy(__n, __ip, __first, __last); 2822 } 2823 else 2824 { 2825 const basic_string __temp(__first, __last, __alloc()); 2826 return __insert_from_safe_copy(__n, __ip, __temp.begin(), __temp.end()); 2827 } 2828} 2829 2830template <class _CharT, class _Traits, class _Allocator> 2831inline 2832basic_string<_CharT, _Traits, _Allocator>& 2833basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str) 2834{ 2835 return insert(__pos1, __str.data(), __str.size()); 2836} 2837 2838template <class _CharT, class _Traits, class _Allocator> 2839basic_string<_CharT, _Traits, _Allocator>& 2840basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str, 2841 size_type __pos2, size_type __n) 2842{ 2843 size_type __str_sz = __str.size(); 2844 if (__pos2 > __str_sz) 2845 __throw_out_of_range(); 2846 return insert(__pos1, __str.data() + __pos2, _VSTD::min(__n, __str_sz - __pos2)); 2847} 2848 2849template <class _CharT, class _Traits, class _Allocator> 2850template <class _Tp> 2851__enable_if_t 2852< 2853 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2854 basic_string<_CharT, _Traits, _Allocator>& 2855> 2856basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const _Tp& __t, 2857 size_type __pos2, size_type __n) 2858{ 2859 __self_view __sv = __t; 2860 size_type __str_sz = __sv.size(); 2861 if (__pos2 > __str_sz) 2862 __throw_out_of_range(); 2863 return insert(__pos1, __sv.data() + __pos2, _VSTD::min(__n, __str_sz - __pos2)); 2864} 2865 2866template <class _CharT, class _Traits, class _Allocator> 2867basic_string<_CharT, _Traits, _Allocator>& 2868basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) 2869{ 2870 _LIBCPP_ASSERT(__s != nullptr, "string::insert received nullptr"); 2871 return insert(__pos, __s, traits_type::length(__s)); 2872} 2873 2874template <class _CharT, class _Traits, class _Allocator> 2875typename basic_string<_CharT, _Traits, _Allocator>::iterator 2876basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) 2877{ 2878 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2879 "string::insert(iterator, character) called with an iterator not" 2880 " referring to this string"); 2881 2882 size_type __ip = static_cast<size_type>(__pos - begin()); 2883 size_type __sz = size(); 2884 size_type __cap = capacity(); 2885 value_type* __p; 2886 if (__cap == __sz) 2887 { 2888 __grow_by(__cap, 1, __sz, __ip, 0, 1); 2889 __p = _VSTD::__to_address(__get_long_pointer()); 2890 } 2891 else 2892 { 2893 __p = _VSTD::__to_address(__get_pointer()); 2894 size_type __n_move = __sz - __ip; 2895 if (__n_move != 0) 2896 traits_type::move(__p + __ip + 1, __p + __ip, __n_move); 2897 } 2898 traits_type::assign(__p[__ip], __c); 2899 traits_type::assign(__p[++__sz], value_type()); 2900 __set_size(__sz); 2901 return begin() + static_cast<difference_type>(__ip); 2902} 2903 2904template <class _CharT, class _Traits, class _Allocator> 2905inline 2906typename basic_string<_CharT, _Traits, _Allocator>::iterator 2907basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, size_type __n, value_type __c) 2908{ 2909 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2910 "string::insert(iterator, n, value) called with an iterator not" 2911 " referring to this string"); 2912 difference_type __p = __pos - begin(); 2913 insert(static_cast<size_type>(__p), __n, __c); 2914 return begin() + __p; 2915} 2916 2917// replace 2918 2919template <class _CharT, class _Traits, class _Allocator> 2920basic_string<_CharT, _Traits, _Allocator>& 2921basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2) 2922 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 2923{ 2924 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); 2925 size_type __sz = size(); 2926 if (__pos > __sz) 2927 __throw_out_of_range(); 2928 __n1 = _VSTD::min(__n1, __sz - __pos); 2929 size_type __cap = capacity(); 2930 if (__cap - __sz + __n1 >= __n2) 2931 { 2932 value_type* __p = _VSTD::__to_address(__get_pointer()); 2933 if (__n1 != __n2) 2934 { 2935 size_type __n_move = __sz - __pos - __n1; 2936 if (__n_move != 0) 2937 { 2938 if (__n1 > __n2) 2939 { 2940 traits_type::move(__p + __pos, __s, __n2); 2941 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2942 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 2943 } 2944 if (__p + __pos < __s && __s < __p + __sz) 2945 { 2946 if (__p + __pos + __n1 <= __s) 2947 __s += __n2 - __n1; 2948 else // __p + __pos < __s < __p + __pos + __n1 2949 { 2950 traits_type::move(__p + __pos, __s, __n1); 2951 __pos += __n1; 2952 __s += __n2; 2953 __n2 -= __n1; 2954 __n1 = 0; 2955 } 2956 } 2957 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2958 } 2959 } 2960 traits_type::move(__p + __pos, __s, __n2); 2961 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 2962 } 2963 else 2964 __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); 2965 return *this; 2966} 2967 2968template <class _CharT, class _Traits, class _Allocator> 2969basic_string<_CharT, _Traits, _Allocator>& 2970basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) 2971{ 2972 size_type __sz = size(); 2973 if (__pos > __sz) 2974 __throw_out_of_range(); 2975 __n1 = _VSTD::min(__n1, __sz - __pos); 2976 size_type __cap = capacity(); 2977 value_type* __p; 2978 if (__cap - __sz + __n1 >= __n2) 2979 { 2980 __p = _VSTD::__to_address(__get_pointer()); 2981 if (__n1 != __n2) 2982 { 2983 size_type __n_move = __sz - __pos - __n1; 2984 if (__n_move != 0) 2985 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2986 } 2987 } 2988 else 2989 { 2990 __grow_by(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); 2991 __p = _VSTD::__to_address(__get_long_pointer()); 2992 } 2993 traits_type::assign(__p + __pos, __n2, __c); 2994 return __null_terminate_at(__p, __sz - (__n1 - __n2)); 2995} 2996 2997template <class _CharT, class _Traits, class _Allocator> 2998template<class _InputIterator> 2999__enable_if_t 3000< 3001 __is_cpp17_input_iterator<_InputIterator>::value, 3002 basic_string<_CharT, _Traits, _Allocator>& 3003> 3004basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, 3005 _InputIterator __j1, _InputIterator __j2) 3006{ 3007 const basic_string __temp(__j1, __j2, __alloc()); 3008 return replace(__i1, __i2, __temp); 3009} 3010 3011template <class _CharT, class _Traits, class _Allocator> 3012inline 3013basic_string<_CharT, _Traits, _Allocator>& 3014basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str) 3015{ 3016 return replace(__pos1, __n1, __str.data(), __str.size()); 3017} 3018 3019template <class _CharT, class _Traits, class _Allocator> 3020basic_string<_CharT, _Traits, _Allocator>& 3021basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str, 3022 size_type __pos2, size_type __n2) 3023{ 3024 size_type __str_sz = __str.size(); 3025 if (__pos2 > __str_sz) 3026 __throw_out_of_range(); 3027 return replace(__pos1, __n1, __str.data() + __pos2, _VSTD::min(__n2, __str_sz - __pos2)); 3028} 3029 3030template <class _CharT, class _Traits, class _Allocator> 3031template <class _Tp> 3032__enable_if_t 3033< 3034 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3035 basic_string<_CharT, _Traits, _Allocator>& 3036> 3037basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const _Tp& __t, 3038 size_type __pos2, size_type __n2) 3039{ 3040 __self_view __sv = __t; 3041 size_type __str_sz = __sv.size(); 3042 if (__pos2 > __str_sz) 3043 __throw_out_of_range(); 3044 return replace(__pos1, __n1, __sv.data() + __pos2, _VSTD::min(__n2, __str_sz - __pos2)); 3045} 3046 3047template <class _CharT, class _Traits, class _Allocator> 3048basic_string<_CharT, _Traits, _Allocator>& 3049basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) 3050{ 3051 _LIBCPP_ASSERT(__s != nullptr, "string::replace received nullptr"); 3052 return replace(__pos, __n1, __s, traits_type::length(__s)); 3053} 3054 3055template <class _CharT, class _Traits, class _Allocator> 3056inline 3057basic_string<_CharT, _Traits, _Allocator>& 3058basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) 3059{ 3060 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), 3061 __str.data(), __str.size()); 3062} 3063 3064template <class _CharT, class _Traits, class _Allocator> 3065inline 3066basic_string<_CharT, _Traits, _Allocator>& 3067basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) 3068{ 3069 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); 3070} 3071 3072template <class _CharT, class _Traits, class _Allocator> 3073inline 3074basic_string<_CharT, _Traits, _Allocator>& 3075basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const value_type* __s) 3076{ 3077 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); 3078} 3079 3080template <class _CharT, class _Traits, class _Allocator> 3081inline 3082basic_string<_CharT, _Traits, _Allocator>& 3083basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) 3084{ 3085 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); 3086} 3087 3088// erase 3089 3090// 'externally instantiated' erase() implementation, called when __n != npos. 3091// Does not check __pos against size() 3092template <class _CharT, class _Traits, class _Allocator> 3093void 3094basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move( 3095 size_type __pos, size_type __n) 3096{ 3097 if (__n) 3098 { 3099 size_type __sz = size(); 3100 value_type* __p = _VSTD::__to_address(__get_pointer()); 3101 __n = _VSTD::min(__n, __sz - __pos); 3102 size_type __n_move = __sz - __pos - __n; 3103 if (__n_move != 0) 3104 traits_type::move(__p + __pos, __p + __pos + __n, __n_move); 3105 __null_terminate_at(__p, __sz - __n); 3106 } 3107} 3108 3109template <class _CharT, class _Traits, class _Allocator> 3110basic_string<_CharT, _Traits, _Allocator>& 3111basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, 3112 size_type __n) { 3113 if (__pos > size()) 3114 __throw_out_of_range(); 3115 if (__n == npos) { 3116 __erase_to_end(__pos); 3117 } else { 3118 __erase_external_with_move(__pos, __n); 3119 } 3120 return *this; 3121} 3122 3123template <class _CharT, class _Traits, class _Allocator> 3124inline 3125typename basic_string<_CharT, _Traits, _Allocator>::iterator 3126basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) 3127{ 3128 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 3129 "string::erase(iterator) called with an iterator not" 3130 " referring to this string"); 3131 3132 _LIBCPP_ASSERT(__pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); 3133 iterator __b = begin(); 3134 size_type __r = static_cast<size_type>(__pos - __b); 3135 erase(__r, 1); 3136 return __b + static_cast<difference_type>(__r); 3137} 3138 3139template <class _CharT, class _Traits, class _Allocator> 3140inline 3141typename basic_string<_CharT, _Traits, _Allocator>::iterator 3142basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) 3143{ 3144 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this, 3145 "string::erase(iterator, iterator) called with an iterator not" 3146 " referring to this string"); 3147 3148 _LIBCPP_ASSERT(__first <= __last, "string::erase(first, last) called with invalid range"); 3149 iterator __b = begin(); 3150 size_type __r = static_cast<size_type>(__first - __b); 3151 erase(__r, static_cast<size_type>(__last - __first)); 3152 return __b + static_cast<difference_type>(__r); 3153} 3154 3155template <class _CharT, class _Traits, class _Allocator> 3156inline 3157void 3158basic_string<_CharT, _Traits, _Allocator>::pop_back() 3159{ 3160 _LIBCPP_ASSERT(!empty(), "string::pop_back(): string is already empty"); 3161 __erase_to_end(size() - 1); 3162} 3163 3164template <class _CharT, class _Traits, class _Allocator> 3165inline 3166void 3167basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT 3168{ 3169 __invalidate_all_iterators(); 3170 if (__is_long()) 3171 { 3172 traits_type::assign(*__get_long_pointer(), value_type()); 3173 __set_long_size(0); 3174 } 3175 else 3176 { 3177 traits_type::assign(*__get_short_pointer(), value_type()); 3178 __set_short_size(0); 3179 } 3180} 3181 3182template <class _CharT, class _Traits, class _Allocator> 3183inline 3184void 3185basic_string<_CharT, _Traits, _Allocator>::__erase_to_end(size_type __pos) 3186{ 3187 __null_terminate_at(_VSTD::__to_address(__get_pointer()), __pos); 3188} 3189 3190template <class _CharT, class _Traits, class _Allocator> 3191void 3192basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) 3193{ 3194 size_type __sz = size(); 3195 if (__n > __sz) 3196 append(__n - __sz, __c); 3197 else 3198 __erase_to_end(__n); 3199} 3200 3201template <class _CharT, class _Traits, class _Allocator> 3202inline void 3203basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) 3204{ 3205 size_type __sz = size(); 3206 if (__n > __sz) { 3207 __append_default_init(__n - __sz); 3208 } else 3209 __erase_to_end(__n); 3210} 3211 3212template <class _CharT, class _Traits, class _Allocator> 3213inline 3214typename basic_string<_CharT, _Traits, _Allocator>::size_type 3215basic_string<_CharT, _Traits, _Allocator>::max_size() const _NOEXCEPT 3216{ 3217 size_type __m = __alloc_traits::max_size(__alloc()); 3218#ifdef _LIBCPP_BIG_ENDIAN 3219 return (__m <= ~__long_mask ? __m : __m/2) - __alignment; 3220#else 3221 return __m - __alignment; 3222#endif 3223} 3224 3225template <class _CharT, class _Traits, class _Allocator> 3226void 3227basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacity) 3228{ 3229 if (__requested_capacity > max_size()) 3230 __throw_length_error(); 3231 3232 // Make sure reserve(n) never shrinks. This is technically only required in C++20 3233 // and later (since P0966R1), however we provide consistent behavior in all Standard 3234 // modes because this function is instantiated in the shared library. 3235 if (__requested_capacity <= capacity()) 3236 return; 3237 3238 size_type __target_capacity = _VSTD::max(__requested_capacity, size()); 3239 __target_capacity = __recommend(__target_capacity); 3240 if (__target_capacity == capacity()) return; 3241 3242 __shrink_or_extend(__target_capacity); 3243} 3244 3245template <class _CharT, class _Traits, class _Allocator> 3246inline 3247void 3248basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT 3249{ 3250 size_type __target_capacity = __recommend(size()); 3251 if (__target_capacity == capacity()) return; 3252 3253 __shrink_or_extend(__target_capacity); 3254} 3255 3256template <class _CharT, class _Traits, class _Allocator> 3257inline 3258void 3259basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) 3260{ 3261 size_type __cap = capacity(); 3262 size_type __sz = size(); 3263 3264 pointer __new_data, __p; 3265 bool __was_long, __now_long; 3266 if (__target_capacity == __min_cap - 1) 3267 { 3268 __was_long = true; 3269 __now_long = false; 3270 __new_data = __get_short_pointer(); 3271 __p = __get_long_pointer(); 3272 } 3273 else 3274 { 3275 if (__target_capacity > __cap) 3276 __new_data = __alloc_traits::allocate(__alloc(), __target_capacity+1); 3277 else 3278 { 3279 #ifndef _LIBCPP_NO_EXCEPTIONS 3280 try 3281 { 3282 #endif // _LIBCPP_NO_EXCEPTIONS 3283 __new_data = __alloc_traits::allocate(__alloc(), __target_capacity+1); 3284 #ifndef _LIBCPP_NO_EXCEPTIONS 3285 } 3286 catch (...) 3287 { 3288 return; 3289 } 3290 #else // _LIBCPP_NO_EXCEPTIONS 3291 if (__new_data == nullptr) 3292 return; 3293 #endif // _LIBCPP_NO_EXCEPTIONS 3294 } 3295 __now_long = true; 3296 __was_long = __is_long(); 3297 __p = __get_pointer(); 3298 } 3299 traits_type::copy(_VSTD::__to_address(__new_data), 3300 _VSTD::__to_address(__p), size()+1); 3301 if (__was_long) 3302 __alloc_traits::deallocate(__alloc(), __p, __cap+1); 3303 if (__now_long) 3304 { 3305 __set_long_cap(__target_capacity+1); 3306 __set_long_size(__sz); 3307 __set_long_pointer(__new_data); 3308 } 3309 else 3310 __set_short_size(__sz); 3311 __invalidate_all_iterators(); 3312} 3313 3314template <class _CharT, class _Traits, class _Allocator> 3315inline 3316typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3317basic_string<_CharT, _Traits, _Allocator>::operator[](size_type __pos) const _NOEXCEPT 3318{ 3319 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 3320 return *(data() + __pos); 3321} 3322 3323template <class _CharT, class _Traits, class _Allocator> 3324inline 3325typename basic_string<_CharT, _Traits, _Allocator>::reference 3326basic_string<_CharT, _Traits, _Allocator>::operator[](size_type __pos) _NOEXCEPT 3327{ 3328 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 3329 return *(__get_pointer() + __pos); 3330} 3331 3332template <class _CharT, class _Traits, class _Allocator> 3333typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3334basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const 3335{ 3336 if (__n >= size()) 3337 __throw_out_of_range(); 3338 return (*this)[__n]; 3339} 3340 3341template <class _CharT, class _Traits, class _Allocator> 3342typename basic_string<_CharT, _Traits, _Allocator>::reference 3343basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) 3344{ 3345 if (__n >= size()) 3346 __throw_out_of_range(); 3347 return (*this)[__n]; 3348} 3349 3350template <class _CharT, class _Traits, class _Allocator> 3351inline 3352typename basic_string<_CharT, _Traits, _Allocator>::reference 3353basic_string<_CharT, _Traits, _Allocator>::front() _NOEXCEPT 3354{ 3355 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 3356 return *__get_pointer(); 3357} 3358 3359template <class _CharT, class _Traits, class _Allocator> 3360inline 3361typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3362basic_string<_CharT, _Traits, _Allocator>::front() const _NOEXCEPT 3363{ 3364 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 3365 return *data(); 3366} 3367 3368template <class _CharT, class _Traits, class _Allocator> 3369inline 3370typename basic_string<_CharT, _Traits, _Allocator>::reference 3371basic_string<_CharT, _Traits, _Allocator>::back() _NOEXCEPT 3372{ 3373 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 3374 return *(__get_pointer() + size() - 1); 3375} 3376 3377template <class _CharT, class _Traits, class _Allocator> 3378inline 3379typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3380basic_string<_CharT, _Traits, _Allocator>::back() const _NOEXCEPT 3381{ 3382 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 3383 return *(data() + size() - 1); 3384} 3385 3386template <class _CharT, class _Traits, class _Allocator> 3387typename basic_string<_CharT, _Traits, _Allocator>::size_type 3388basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const 3389{ 3390 size_type __sz = size(); 3391 if (__pos > __sz) 3392 __throw_out_of_range(); 3393 size_type __rlen = _VSTD::min(__n, __sz - __pos); 3394 traits_type::copy(__s, data() + __pos, __rlen); 3395 return __rlen; 3396} 3397 3398template <class _CharT, class _Traits, class _Allocator> 3399inline 3400basic_string<_CharT, _Traits, _Allocator> 3401basic_string<_CharT, _Traits, _Allocator>::substr(size_type __pos, size_type __n) const 3402{ 3403 return basic_string(*this, __pos, __n, __alloc()); 3404} 3405 3406template <class _CharT, class _Traits, class _Allocator> 3407inline 3408void 3409basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) 3410#if _LIBCPP_STD_VER >= 14 3411 _NOEXCEPT 3412#else 3413 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 3414 __is_nothrow_swappable<allocator_type>::value) 3415#endif 3416{ 3417#if _LIBCPP_DEBUG_LEVEL == 2 3418 if (!__libcpp_is_constant_evaluated()) { 3419 if (!__is_long()) 3420 __get_db()->__invalidate_all(this); 3421 if (!__str.__is_long()) 3422 __get_db()->__invalidate_all(&__str); 3423 __get_db()->swap(this, &__str); 3424 } 3425#endif 3426 _LIBCPP_ASSERT( 3427 __alloc_traits::propagate_on_container_swap::value || 3428 __alloc_traits::is_always_equal::value || 3429 __alloc() == __str.__alloc(), "swapping non-equal allocators"); 3430 _VSTD::swap(__r_.first(), __str.__r_.first()); 3431 _VSTD::__swap_allocator(__alloc(), __str.__alloc()); 3432} 3433 3434// find 3435 3436template <class _Traits> 3437struct _LIBCPP_HIDDEN __traits_eq 3438{ 3439 typedef typename _Traits::char_type char_type; 3440 _LIBCPP_INLINE_VISIBILITY 3441 bool operator()(const char_type& __x, const char_type& __y) _NOEXCEPT 3442 {return _Traits::eq(__x, __y);} 3443}; 3444 3445template<class _CharT, class _Traits, class _Allocator> 3446typename basic_string<_CharT, _Traits, _Allocator>::size_type 3447basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3448 size_type __pos, 3449 size_type __n) const _NOEXCEPT 3450{ 3451 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find(): received nullptr"); 3452 return __str_find<value_type, size_type, traits_type, npos> 3453 (data(), size(), __s, __pos, __n); 3454} 3455 3456template<class _CharT, class _Traits, class _Allocator> 3457inline 3458typename basic_string<_CharT, _Traits, _Allocator>::size_type 3459basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, 3460 size_type __pos) const _NOEXCEPT 3461{ 3462 return __str_find<value_type, size_type, traits_type, npos> 3463 (data(), size(), __str.data(), __pos, __str.size()); 3464} 3465 3466template<class _CharT, class _Traits, class _Allocator> 3467template <class _Tp> 3468__enable_if_t 3469< 3470 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3471 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3472> 3473basic_string<_CharT, _Traits, _Allocator>::find(const _Tp &__t, 3474 size_type __pos) const _NOEXCEPT 3475{ 3476 __self_view __sv = __t; 3477 return __str_find<value_type, size_type, traits_type, npos> 3478 (data(), size(), __sv.data(), __pos, __sv.size()); 3479} 3480 3481template<class _CharT, class _Traits, class _Allocator> 3482inline 3483typename basic_string<_CharT, _Traits, _Allocator>::size_type 3484basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3485 size_type __pos) const _NOEXCEPT 3486{ 3487 _LIBCPP_ASSERT(__s != nullptr, "string::find(): received nullptr"); 3488 return __str_find<value_type, size_type, traits_type, npos> 3489 (data(), size(), __s, __pos, traits_type::length(__s)); 3490} 3491 3492template<class _CharT, class _Traits, class _Allocator> 3493typename basic_string<_CharT, _Traits, _Allocator>::size_type 3494basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, 3495 size_type __pos) const _NOEXCEPT 3496{ 3497 return __str_find<value_type, size_type, traits_type, npos> 3498 (data(), size(), __c, __pos); 3499} 3500 3501// rfind 3502 3503template<class _CharT, class _Traits, class _Allocator> 3504typename basic_string<_CharT, _Traits, _Allocator>::size_type 3505basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3506 size_type __pos, 3507 size_type __n) const _NOEXCEPT 3508{ 3509 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); 3510 return __str_rfind<value_type, size_type, traits_type, npos> 3511 (data(), size(), __s, __pos, __n); 3512} 3513 3514template<class _CharT, class _Traits, class _Allocator> 3515inline 3516typename basic_string<_CharT, _Traits, _Allocator>::size_type 3517basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, 3518 size_type __pos) const _NOEXCEPT 3519{ 3520 return __str_rfind<value_type, size_type, traits_type, npos> 3521 (data(), size(), __str.data(), __pos, __str.size()); 3522} 3523 3524template<class _CharT, class _Traits, class _Allocator> 3525template <class _Tp> 3526__enable_if_t 3527< 3528 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3529 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3530> 3531basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, 3532 size_type __pos) const _NOEXCEPT 3533{ 3534 __self_view __sv = __t; 3535 return __str_rfind<value_type, size_type, traits_type, npos> 3536 (data(), size(), __sv.data(), __pos, __sv.size()); 3537} 3538 3539template<class _CharT, class _Traits, class _Allocator> 3540inline 3541typename basic_string<_CharT, _Traits, _Allocator>::size_type 3542basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3543 size_type __pos) const _NOEXCEPT 3544{ 3545 _LIBCPP_ASSERT(__s != nullptr, "string::rfind(): received nullptr"); 3546 return __str_rfind<value_type, size_type, traits_type, npos> 3547 (data(), size(), __s, __pos, traits_type::length(__s)); 3548} 3549 3550template<class _CharT, class _Traits, class _Allocator> 3551typename basic_string<_CharT, _Traits, _Allocator>::size_type 3552basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, 3553 size_type __pos) const _NOEXCEPT 3554{ 3555 return __str_rfind<value_type, size_type, traits_type, npos> 3556 (data(), size(), __c, __pos); 3557} 3558 3559// find_first_of 3560 3561template<class _CharT, class _Traits, class _Allocator> 3562typename basic_string<_CharT, _Traits, _Allocator>::size_type 3563basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3564 size_type __pos, 3565 size_type __n) const _NOEXCEPT 3566{ 3567 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); 3568 return __str_find_first_of<value_type, size_type, traits_type, npos> 3569 (data(), size(), __s, __pos, __n); 3570} 3571 3572template<class _CharT, class _Traits, class _Allocator> 3573inline 3574typename basic_string<_CharT, _Traits, _Allocator>::size_type 3575basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, 3576 size_type __pos) const _NOEXCEPT 3577{ 3578 return __str_find_first_of<value_type, size_type, traits_type, npos> 3579 (data(), size(), __str.data(), __pos, __str.size()); 3580} 3581 3582template<class _CharT, class _Traits, class _Allocator> 3583template <class _Tp> 3584__enable_if_t 3585< 3586 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3587 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3588> 3589basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, 3590 size_type __pos) const _NOEXCEPT 3591{ 3592 __self_view __sv = __t; 3593 return __str_find_first_of<value_type, size_type, traits_type, npos> 3594 (data(), size(), __sv.data(), __pos, __sv.size()); 3595} 3596 3597template<class _CharT, class _Traits, class _Allocator> 3598inline 3599typename basic_string<_CharT, _Traits, _Allocator>::size_type 3600basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3601 size_type __pos) const _NOEXCEPT 3602{ 3603 _LIBCPP_ASSERT(__s != nullptr, "string::find_first_of(): received nullptr"); 3604 return __str_find_first_of<value_type, size_type, traits_type, npos> 3605 (data(), size(), __s, __pos, traits_type::length(__s)); 3606} 3607 3608template<class _CharT, class _Traits, class _Allocator> 3609inline 3610typename basic_string<_CharT, _Traits, _Allocator>::size_type 3611basic_string<_CharT, _Traits, _Allocator>::find_first_of(value_type __c, 3612 size_type __pos) const _NOEXCEPT 3613{ 3614 return find(__c, __pos); 3615} 3616 3617// find_last_of 3618 3619template<class _CharT, class _Traits, class _Allocator> 3620typename basic_string<_CharT, _Traits, _Allocator>::size_type 3621basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3622 size_type __pos, 3623 size_type __n) const _NOEXCEPT 3624{ 3625 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); 3626 return __str_find_last_of<value_type, size_type, traits_type, npos> 3627 (data(), size(), __s, __pos, __n); 3628} 3629 3630template<class _CharT, class _Traits, class _Allocator> 3631inline 3632typename basic_string<_CharT, _Traits, _Allocator>::size_type 3633basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, 3634 size_type __pos) const _NOEXCEPT 3635{ 3636 return __str_find_last_of<value_type, size_type, traits_type, npos> 3637 (data(), size(), __str.data(), __pos, __str.size()); 3638} 3639 3640template<class _CharT, class _Traits, class _Allocator> 3641template <class _Tp> 3642__enable_if_t 3643< 3644 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3645 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3646> 3647basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, 3648 size_type __pos) const _NOEXCEPT 3649{ 3650 __self_view __sv = __t; 3651 return __str_find_last_of<value_type, size_type, traits_type, npos> 3652 (data(), size(), __sv.data(), __pos, __sv.size()); 3653} 3654 3655template<class _CharT, class _Traits, class _Allocator> 3656inline 3657typename basic_string<_CharT, _Traits, _Allocator>::size_type 3658basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3659 size_type __pos) const _NOEXCEPT 3660{ 3661 _LIBCPP_ASSERT(__s != nullptr, "string::find_last_of(): received nullptr"); 3662 return __str_find_last_of<value_type, size_type, traits_type, npos> 3663 (data(), size(), __s, __pos, traits_type::length(__s)); 3664} 3665 3666template<class _CharT, class _Traits, class _Allocator> 3667inline 3668typename basic_string<_CharT, _Traits, _Allocator>::size_type 3669basic_string<_CharT, _Traits, _Allocator>::find_last_of(value_type __c, 3670 size_type __pos) const _NOEXCEPT 3671{ 3672 return rfind(__c, __pos); 3673} 3674 3675// find_first_not_of 3676 3677template<class _CharT, class _Traits, class _Allocator> 3678typename basic_string<_CharT, _Traits, _Allocator>::size_type 3679basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3680 size_type __pos, 3681 size_type __n) const _NOEXCEPT 3682{ 3683 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); 3684 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3685 (data(), size(), __s, __pos, __n); 3686} 3687 3688template<class _CharT, class _Traits, class _Allocator> 3689inline 3690typename basic_string<_CharT, _Traits, _Allocator>::size_type 3691basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const basic_string& __str, 3692 size_type __pos) const _NOEXCEPT 3693{ 3694 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3695 (data(), size(), __str.data(), __pos, __str.size()); 3696} 3697 3698template<class _CharT, class _Traits, class _Allocator> 3699template <class _Tp> 3700__enable_if_t 3701< 3702 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3703 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3704> 3705basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, 3706 size_type __pos) const _NOEXCEPT 3707{ 3708 __self_view __sv = __t; 3709 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3710 (data(), size(), __sv.data(), __pos, __sv.size()); 3711} 3712 3713template<class _CharT, class _Traits, class _Allocator> 3714inline 3715typename basic_string<_CharT, _Traits, _Allocator>::size_type 3716basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3717 size_type __pos) const _NOEXCEPT 3718{ 3719 _LIBCPP_ASSERT(__s != nullptr, "string::find_first_not_of(): received nullptr"); 3720 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3721 (data(), size(), __s, __pos, traits_type::length(__s)); 3722} 3723 3724template<class _CharT, class _Traits, class _Allocator> 3725inline 3726typename basic_string<_CharT, _Traits, _Allocator>::size_type 3727basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(value_type __c, 3728 size_type __pos) const _NOEXCEPT 3729{ 3730 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3731 (data(), size(), __c, __pos); 3732} 3733 3734// find_last_not_of 3735 3736template<class _CharT, class _Traits, class _Allocator> 3737typename basic_string<_CharT, _Traits, _Allocator>::size_type 3738basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3739 size_type __pos, 3740 size_type __n) const _NOEXCEPT 3741{ 3742 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); 3743 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3744 (data(), size(), __s, __pos, __n); 3745} 3746 3747template<class _CharT, class _Traits, class _Allocator> 3748inline 3749typename basic_string<_CharT, _Traits, _Allocator>::size_type 3750basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const basic_string& __str, 3751 size_type __pos) const _NOEXCEPT 3752{ 3753 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3754 (data(), size(), __str.data(), __pos, __str.size()); 3755} 3756 3757template<class _CharT, class _Traits, class _Allocator> 3758template <class _Tp> 3759__enable_if_t 3760< 3761 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3762 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3763> 3764basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, 3765 size_type __pos) const _NOEXCEPT 3766{ 3767 __self_view __sv = __t; 3768 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3769 (data(), size(), __sv.data(), __pos, __sv.size()); 3770} 3771 3772template<class _CharT, class _Traits, class _Allocator> 3773inline 3774typename basic_string<_CharT, _Traits, _Allocator>::size_type 3775basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3776 size_type __pos) const _NOEXCEPT 3777{ 3778 _LIBCPP_ASSERT(__s != nullptr, "string::find_last_not_of(): received nullptr"); 3779 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3780 (data(), size(), __s, __pos, traits_type::length(__s)); 3781} 3782 3783template<class _CharT, class _Traits, class _Allocator> 3784inline 3785typename basic_string<_CharT, _Traits, _Allocator>::size_type 3786basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(value_type __c, 3787 size_type __pos) const _NOEXCEPT 3788{ 3789 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3790 (data(), size(), __c, __pos); 3791} 3792 3793// compare 3794 3795template <class _CharT, class _Traits, class _Allocator> 3796template <class _Tp> 3797__enable_if_t 3798< 3799 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3800 int 3801> 3802basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const _NOEXCEPT 3803{ 3804 __self_view __sv = __t; 3805 size_t __lhs_sz = size(); 3806 size_t __rhs_sz = __sv.size(); 3807 int __result = traits_type::compare(data(), __sv.data(), 3808 _VSTD::min(__lhs_sz, __rhs_sz)); 3809 if (__result != 0) 3810 return __result; 3811 if (__lhs_sz < __rhs_sz) 3812 return -1; 3813 if (__lhs_sz > __rhs_sz) 3814 return 1; 3815 return 0; 3816} 3817 3818template <class _CharT, class _Traits, class _Allocator> 3819inline 3820int 3821basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT 3822{ 3823 return compare(__self_view(__str)); 3824} 3825 3826template <class _CharT, class _Traits, class _Allocator> 3827int 3828basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3829 size_type __n1, 3830 const value_type* __s, 3831 size_type __n2) const 3832{ 3833 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); 3834 size_type __sz = size(); 3835 if (__pos1 > __sz || __n2 == npos) 3836 __throw_out_of_range(); 3837 size_type __rlen = _VSTD::min(__n1, __sz - __pos1); 3838 int __r = traits_type::compare(data() + __pos1, __s, _VSTD::min(__rlen, __n2)); 3839 if (__r == 0) 3840 { 3841 if (__rlen < __n2) 3842 __r = -1; 3843 else if (__rlen > __n2) 3844 __r = 1; 3845 } 3846 return __r; 3847} 3848 3849template <class _CharT, class _Traits, class _Allocator> 3850template <class _Tp> 3851__enable_if_t 3852< 3853 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3854 int 3855> 3856basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3857 size_type __n1, 3858 const _Tp& __t) const 3859{ 3860 __self_view __sv = __t; 3861 return compare(__pos1, __n1, __sv.data(), __sv.size()); 3862} 3863 3864template <class _CharT, class _Traits, class _Allocator> 3865inline 3866int 3867basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3868 size_type __n1, 3869 const basic_string& __str) const 3870{ 3871 return compare(__pos1, __n1, __str.data(), __str.size()); 3872} 3873 3874template <class _CharT, class _Traits, class _Allocator> 3875template <class _Tp> 3876__enable_if_t 3877< 3878 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 3879 && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3880 int 3881> 3882basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3883 size_type __n1, 3884 const _Tp& __t, 3885 size_type __pos2, 3886 size_type __n2) const 3887{ 3888 __self_view __sv = __t; 3889 return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 3890} 3891 3892template <class _CharT, class _Traits, class _Allocator> 3893int 3894basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3895 size_type __n1, 3896 const basic_string& __str, 3897 size_type __pos2, 3898 size_type __n2) const 3899{ 3900 return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); 3901} 3902 3903template <class _CharT, class _Traits, class _Allocator> 3904int 3905basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT 3906{ 3907 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3908 return compare(0, npos, __s, traits_type::length(__s)); 3909} 3910 3911template <class _CharT, class _Traits, class _Allocator> 3912int 3913basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3914 size_type __n1, 3915 const value_type* __s) const 3916{ 3917 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3918 return compare(__pos1, __n1, __s, traits_type::length(__s)); 3919} 3920 3921// __invariants 3922 3923template<class _CharT, class _Traits, class _Allocator> 3924inline 3925bool 3926basic_string<_CharT, _Traits, _Allocator>::__invariants() const 3927{ 3928 if (size() > capacity()) 3929 return false; 3930 if (capacity() < __min_cap - 1) 3931 return false; 3932 if (data() == nullptr) 3933 return false; 3934 if (data()[size()] != value_type()) 3935 return false; 3936 return true; 3937} 3938 3939// __clear_and_shrink 3940 3941template<class _CharT, class _Traits, class _Allocator> 3942inline 3943void 3944basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT 3945{ 3946 clear(); 3947 if(__is_long()) 3948 { 3949 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1); 3950 __set_long_cap(0); 3951 __set_short_size(0); 3952 traits_type::assign(*__get_short_pointer(), value_type()); 3953 } 3954} 3955 3956// operator== 3957 3958template<class _CharT, class _Traits, class _Allocator> 3959inline _LIBCPP_INLINE_VISIBILITY 3960bool 3961operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3962 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3963{ 3964 size_t __lhs_sz = __lhs.size(); 3965 return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), 3966 __rhs.data(), 3967 __lhs_sz) == 0; 3968} 3969 3970template<class _Allocator> 3971inline _LIBCPP_INLINE_VISIBILITY 3972bool 3973operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, 3974 const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT 3975{ 3976 size_t __lhs_sz = __lhs.size(); 3977 if (__lhs_sz != __rhs.size()) 3978 return false; 3979 const char* __lp = __lhs.data(); 3980 const char* __rp = __rhs.data(); 3981 if (__lhs.__is_long()) 3982 return char_traits<char>::compare(__lp, __rp, __lhs_sz) == 0; 3983 for (; __lhs_sz != 0; --__lhs_sz, ++__lp, ++__rp) 3984 if (*__lp != *__rp) 3985 return false; 3986 return true; 3987} 3988 3989template<class _CharT, class _Traits, class _Allocator> 3990inline _LIBCPP_INLINE_VISIBILITY 3991bool 3992operator==(const _CharT* __lhs, 3993 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3994{ 3995 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3996 _LIBCPP_ASSERT(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); 3997 size_t __lhs_len = _Traits::length(__lhs); 3998 if (__lhs_len != __rhs.size()) return false; 3999 return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; 4000} 4001 4002template<class _CharT, class _Traits, class _Allocator> 4003inline _LIBCPP_INLINE_VISIBILITY 4004bool 4005operator==(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 4006 const _CharT* __rhs) _NOEXCEPT 4007{ 4008 typedef basic_string<_CharT, _Traits, _Allocator> _String; 4009 _LIBCPP_ASSERT(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); 4010 size_t __rhs_len = _Traits::length(__rhs); 4011 if (__rhs_len != __lhs.size()) return false; 4012 return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; 4013} 4014 4015template<class _CharT, class _Traits, class _Allocator> 4016inline _LIBCPP_INLINE_VISIBILITY 4017bool 4018operator!=(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 4019 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4020{ 4021 return !(__lhs == __rhs); 4022} 4023 4024template<class _CharT, class _Traits, class _Allocator> 4025inline _LIBCPP_INLINE_VISIBILITY 4026bool 4027operator!=(const _CharT* __lhs, 4028 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4029{ 4030 return !(__lhs == __rhs); 4031} 4032 4033template<class _CharT, class _Traits, class _Allocator> 4034inline _LIBCPP_INLINE_VISIBILITY 4035bool 4036operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4037 const _CharT* __rhs) _NOEXCEPT 4038{ 4039 return !(__lhs == __rhs); 4040} 4041 4042// operator< 4043 4044template<class _CharT, class _Traits, class _Allocator> 4045inline _LIBCPP_INLINE_VISIBILITY 4046bool 4047operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4048 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4049{ 4050 return __lhs.compare(__rhs) < 0; 4051} 4052 4053template<class _CharT, class _Traits, class _Allocator> 4054inline _LIBCPP_INLINE_VISIBILITY 4055bool 4056operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4057 const _CharT* __rhs) _NOEXCEPT 4058{ 4059 return __lhs.compare(__rhs) < 0; 4060} 4061 4062template<class _CharT, class _Traits, class _Allocator> 4063inline _LIBCPP_INLINE_VISIBILITY 4064bool 4065operator< (const _CharT* __lhs, 4066 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4067{ 4068 return __rhs.compare(__lhs) > 0; 4069} 4070 4071// operator> 4072 4073template<class _CharT, class _Traits, class _Allocator> 4074inline _LIBCPP_INLINE_VISIBILITY 4075bool 4076operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4077 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4078{ 4079 return __rhs < __lhs; 4080} 4081 4082template<class _CharT, class _Traits, class _Allocator> 4083inline _LIBCPP_INLINE_VISIBILITY 4084bool 4085operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4086 const _CharT* __rhs) _NOEXCEPT 4087{ 4088 return __rhs < __lhs; 4089} 4090 4091template<class _CharT, class _Traits, class _Allocator> 4092inline _LIBCPP_INLINE_VISIBILITY 4093bool 4094operator> (const _CharT* __lhs, 4095 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4096{ 4097 return __rhs < __lhs; 4098} 4099 4100// operator<= 4101 4102template<class _CharT, class _Traits, class _Allocator> 4103inline _LIBCPP_INLINE_VISIBILITY 4104bool 4105operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4106 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4107{ 4108 return !(__rhs < __lhs); 4109} 4110 4111template<class _CharT, class _Traits, class _Allocator> 4112inline _LIBCPP_INLINE_VISIBILITY 4113bool 4114operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4115 const _CharT* __rhs) _NOEXCEPT 4116{ 4117 return !(__rhs < __lhs); 4118} 4119 4120template<class _CharT, class _Traits, class _Allocator> 4121inline _LIBCPP_INLINE_VISIBILITY 4122bool 4123operator<=(const _CharT* __lhs, 4124 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4125{ 4126 return !(__rhs < __lhs); 4127} 4128 4129// operator>= 4130 4131template<class _CharT, class _Traits, class _Allocator> 4132inline _LIBCPP_INLINE_VISIBILITY 4133bool 4134operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4135 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4136{ 4137 return !(__lhs < __rhs); 4138} 4139 4140template<class _CharT, class _Traits, class _Allocator> 4141inline _LIBCPP_INLINE_VISIBILITY 4142bool 4143operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4144 const _CharT* __rhs) _NOEXCEPT 4145{ 4146 return !(__lhs < __rhs); 4147} 4148 4149template<class _CharT, class _Traits, class _Allocator> 4150inline _LIBCPP_INLINE_VISIBILITY 4151bool 4152operator>=(const _CharT* __lhs, 4153 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4154{ 4155 return !(__lhs < __rhs); 4156} 4157 4158// operator + 4159 4160template<class _CharT, class _Traits, class _Allocator> 4161basic_string<_CharT, _Traits, _Allocator> 4162operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4163 const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4164{ 4165 using _String = basic_string<_CharT, _Traits, _Allocator>; 4166 _String __r(_String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4167 typename _String::size_type __lhs_sz = __lhs.size(); 4168 typename _String::size_type __rhs_sz = __rhs.size(); 4169 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + __rhs_sz); 4170 __r.append(__rhs.data(), __rhs_sz); 4171 return __r; 4172} 4173 4174template<class _CharT, class _Traits, class _Allocator> 4175basic_string<_CharT, _Traits, _Allocator> 4176operator+(const _CharT* __lhs , const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4177{ 4178 using _String = basic_string<_CharT, _Traits, _Allocator>; 4179 _String __r(_String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4180 typename _String::size_type __lhs_sz = _Traits::length(__lhs); 4181 typename _String::size_type __rhs_sz = __rhs.size(); 4182 __r.__init(__lhs, __lhs_sz, __lhs_sz + __rhs_sz); 4183 __r.append(__rhs.data(), __rhs_sz); 4184 return __r; 4185} 4186 4187template<class _CharT, class _Traits, class _Allocator> 4188basic_string<_CharT, _Traits, _Allocator> 4189operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4190{ 4191 using _String = basic_string<_CharT, _Traits, _Allocator>; 4192 _String __r(_String::__alloc_traits::select_on_container_copy_construction(__rhs.get_allocator())); 4193 typename _String::size_type __rhs_sz = __rhs.size(); 4194 __r.__init(&__lhs, 1, 1 + __rhs_sz); 4195 __r.append(__rhs.data(), __rhs_sz); 4196 return __r; 4197} 4198 4199template<class _CharT, class _Traits, class _Allocator> 4200inline 4201basic_string<_CharT, _Traits, _Allocator> 4202operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) 4203{ 4204 using _String = basic_string<_CharT, _Traits, _Allocator>; 4205 _String __r(_String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4206 typename _String::size_type __lhs_sz = __lhs.size(); 4207 typename _String::size_type __rhs_sz = _Traits::length(__rhs); 4208 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + __rhs_sz); 4209 __r.append(__rhs, __rhs_sz); 4210 return __r; 4211} 4212 4213template<class _CharT, class _Traits, class _Allocator> 4214basic_string<_CharT, _Traits, _Allocator> 4215operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) 4216{ 4217 using _String = basic_string<_CharT, _Traits, _Allocator>; 4218 _String __r(_String::__alloc_traits::select_on_container_copy_construction(__lhs.get_allocator())); 4219 typename _String::size_type __lhs_sz = __lhs.size(); 4220 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + 1); 4221 __r.push_back(__rhs); 4222 return __r; 4223} 4224 4225#ifndef _LIBCPP_CXX03_LANG 4226 4227template<class _CharT, class _Traits, class _Allocator> 4228inline _LIBCPP_INLINE_VISIBILITY 4229basic_string<_CharT, _Traits, _Allocator> 4230operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4231{ 4232 return _VSTD::move(__lhs.append(__rhs)); 4233} 4234 4235template<class _CharT, class _Traits, class _Allocator> 4236inline _LIBCPP_INLINE_VISIBILITY 4237basic_string<_CharT, _Traits, _Allocator> 4238operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4239{ 4240 return _VSTD::move(__rhs.insert(0, __lhs)); 4241} 4242 4243template<class _CharT, class _Traits, class _Allocator> 4244inline _LIBCPP_INLINE_VISIBILITY 4245basic_string<_CharT, _Traits, _Allocator> 4246operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4247{ 4248 return _VSTD::move(__lhs.append(__rhs)); 4249} 4250 4251template<class _CharT, class _Traits, class _Allocator> 4252inline _LIBCPP_INLINE_VISIBILITY 4253basic_string<_CharT, _Traits, _Allocator> 4254operator+(const _CharT* __lhs , basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4255{ 4256 return _VSTD::move(__rhs.insert(0, __lhs)); 4257} 4258 4259template<class _CharT, class _Traits, class _Allocator> 4260inline _LIBCPP_INLINE_VISIBILITY 4261basic_string<_CharT, _Traits, _Allocator> 4262operator+(_CharT __lhs, basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4263{ 4264 __rhs.insert(__rhs.begin(), __lhs); 4265 return _VSTD::move(__rhs); 4266} 4267 4268template<class _CharT, class _Traits, class _Allocator> 4269inline _LIBCPP_INLINE_VISIBILITY 4270basic_string<_CharT, _Traits, _Allocator> 4271operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) 4272{ 4273 return _VSTD::move(__lhs.append(__rhs)); 4274} 4275 4276template<class _CharT, class _Traits, class _Allocator> 4277inline _LIBCPP_INLINE_VISIBILITY 4278basic_string<_CharT, _Traits, _Allocator> 4279operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) 4280{ 4281 __lhs.push_back(__rhs); 4282 return _VSTD::move(__lhs); 4283} 4284 4285#endif // _LIBCPP_CXX03_LANG 4286 4287// swap 4288 4289template<class _CharT, class _Traits, class _Allocator> 4290inline _LIBCPP_INLINE_VISIBILITY 4291void 4292swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, 4293 basic_string<_CharT, _Traits, _Allocator>& __rhs) 4294 _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) 4295{ 4296 __lhs.swap(__rhs); 4297} 4298 4299_LIBCPP_FUNC_VIS int stoi (const string& __str, size_t* __idx = nullptr, int __base = 10); 4300_LIBCPP_FUNC_VIS long stol (const string& __str, size_t* __idx = nullptr, int __base = 10); 4301_LIBCPP_FUNC_VIS unsigned long stoul (const string& __str, size_t* __idx = nullptr, int __base = 10); 4302_LIBCPP_FUNC_VIS long long stoll (const string& __str, size_t* __idx = nullptr, int __base = 10); 4303_LIBCPP_FUNC_VIS unsigned long long stoull(const string& __str, size_t* __idx = nullptr, int __base = 10); 4304 4305_LIBCPP_FUNC_VIS float stof (const string& __str, size_t* __idx = nullptr); 4306_LIBCPP_FUNC_VIS double stod (const string& __str, size_t* __idx = nullptr); 4307_LIBCPP_FUNC_VIS long double stold(const string& __str, size_t* __idx = nullptr); 4308 4309_LIBCPP_FUNC_VIS string to_string(int __val); 4310_LIBCPP_FUNC_VIS string to_string(unsigned __val); 4311_LIBCPP_FUNC_VIS string to_string(long __val); 4312_LIBCPP_FUNC_VIS string to_string(unsigned long __val); 4313_LIBCPP_FUNC_VIS string to_string(long long __val); 4314_LIBCPP_FUNC_VIS string to_string(unsigned long long __val); 4315_LIBCPP_FUNC_VIS string to_string(float __val); 4316_LIBCPP_FUNC_VIS string to_string(double __val); 4317_LIBCPP_FUNC_VIS string to_string(long double __val); 4318 4319#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4320_LIBCPP_FUNC_VIS int stoi (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4321_LIBCPP_FUNC_VIS long stol (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4322_LIBCPP_FUNC_VIS unsigned long stoul (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4323_LIBCPP_FUNC_VIS long long stoll (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4324_LIBCPP_FUNC_VIS unsigned long long stoull(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4325 4326_LIBCPP_FUNC_VIS float stof (const wstring& __str, size_t* __idx = nullptr); 4327_LIBCPP_FUNC_VIS double stod (const wstring& __str, size_t* __idx = nullptr); 4328_LIBCPP_FUNC_VIS long double stold(const wstring& __str, size_t* __idx = nullptr); 4329 4330_LIBCPP_FUNC_VIS wstring to_wstring(int __val); 4331_LIBCPP_FUNC_VIS wstring to_wstring(unsigned __val); 4332_LIBCPP_FUNC_VIS wstring to_wstring(long __val); 4333_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long __val); 4334_LIBCPP_FUNC_VIS wstring to_wstring(long long __val); 4335_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long long __val); 4336_LIBCPP_FUNC_VIS wstring to_wstring(float __val); 4337_LIBCPP_FUNC_VIS wstring to_wstring(double __val); 4338_LIBCPP_FUNC_VIS wstring to_wstring(long double __val); 4339#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS 4340 4341template<class _CharT, class _Traits, class _Allocator> 4342_LIBCPP_TEMPLATE_DATA_VIS 4343const typename basic_string<_CharT, _Traits, _Allocator>::size_type 4344 basic_string<_CharT, _Traits, _Allocator>::npos; 4345 4346template <class _CharT, class _Allocator> 4347struct _LIBCPP_TEMPLATE_VIS 4348 hash<basic_string<_CharT, char_traits<_CharT>, _Allocator> > 4349 : public unary_function< 4350 basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> 4351{ 4352 size_t 4353 operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT 4354 { return __do_string_hash(__val.data(), __val.data() + __val.size()); } 4355}; 4356 4357 4358template<class _CharT, class _Traits, class _Allocator> 4359basic_ostream<_CharT, _Traits>& 4360operator<<(basic_ostream<_CharT, _Traits>& __os, 4361 const basic_string<_CharT, _Traits, _Allocator>& __str); 4362 4363template<class _CharT, class _Traits, class _Allocator> 4364basic_istream<_CharT, _Traits>& 4365operator>>(basic_istream<_CharT, _Traits>& __is, 4366 basic_string<_CharT, _Traits, _Allocator>& __str); 4367 4368template<class _CharT, class _Traits, class _Allocator> 4369basic_istream<_CharT, _Traits>& 4370getline(basic_istream<_CharT, _Traits>& __is, 4371 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4372 4373template<class _CharT, class _Traits, class _Allocator> 4374inline _LIBCPP_INLINE_VISIBILITY 4375basic_istream<_CharT, _Traits>& 4376getline(basic_istream<_CharT, _Traits>& __is, 4377 basic_string<_CharT, _Traits, _Allocator>& __str); 4378 4379template<class _CharT, class _Traits, class _Allocator> 4380inline _LIBCPP_INLINE_VISIBILITY 4381basic_istream<_CharT, _Traits>& 4382getline(basic_istream<_CharT, _Traits>&& __is, 4383 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4384 4385template<class _CharT, class _Traits, class _Allocator> 4386inline _LIBCPP_INLINE_VISIBILITY 4387basic_istream<_CharT, _Traits>& 4388getline(basic_istream<_CharT, _Traits>&& __is, 4389 basic_string<_CharT, _Traits, _Allocator>& __str); 4390 4391#if _LIBCPP_STD_VER > 17 4392template <class _CharT, class _Traits, class _Allocator, class _Up> 4393inline _LIBCPP_INLINE_VISIBILITY 4394 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4395 erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { 4396 auto __old_size = __str.size(); 4397 __str.erase(_VSTD::remove(__str.begin(), __str.end(), __v), __str.end()); 4398 return __old_size - __str.size(); 4399} 4400 4401template <class _CharT, class _Traits, class _Allocator, class _Predicate> 4402inline _LIBCPP_INLINE_VISIBILITY 4403 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4404 erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, 4405 _Predicate __pred) { 4406 auto __old_size = __str.size(); 4407 __str.erase(_VSTD::remove_if(__str.begin(), __str.end(), __pred), 4408 __str.end()); 4409 return __old_size - __str.size(); 4410} 4411#endif 4412 4413#if _LIBCPP_DEBUG_LEVEL == 2 4414 4415template<class _CharT, class _Traits, class _Allocator> 4416bool 4417basic_string<_CharT, _Traits, _Allocator>::__dereferenceable(const const_iterator* __i) const 4418{ 4419 return data() <= _VSTD::__to_address(__i->base()) && 4420 _VSTD::__to_address(__i->base()) < data() + size(); 4421} 4422 4423template<class _CharT, class _Traits, class _Allocator> 4424bool 4425basic_string<_CharT, _Traits, _Allocator>::__decrementable(const const_iterator* __i) const 4426{ 4427 return data() < _VSTD::__to_address(__i->base()) && 4428 _VSTD::__to_address(__i->base()) <= data() + size(); 4429} 4430 4431template<class _CharT, class _Traits, class _Allocator> 4432bool 4433basic_string<_CharT, _Traits, _Allocator>::__addable(const const_iterator* __i, ptrdiff_t __n) const 4434{ 4435 const value_type* __p = _VSTD::__to_address(__i->base()) + __n; 4436 return data() <= __p && __p <= data() + size(); 4437} 4438 4439template<class _CharT, class _Traits, class _Allocator> 4440bool 4441basic_string<_CharT, _Traits, _Allocator>::__subscriptable(const const_iterator* __i, ptrdiff_t __n) const 4442{ 4443 const value_type* __p = _VSTD::__to_address(__i->base()) + __n; 4444 return data() <= __p && __p < data() + size(); 4445} 4446 4447#endif // _LIBCPP_DEBUG_LEVEL == 2 4448 4449#if _LIBCPP_STD_VER > 11 4450// Literal suffixes for basic_string [basic.string.literals] 4451inline namespace literals 4452{ 4453 inline namespace string_literals 4454 { 4455 inline _LIBCPP_INLINE_VISIBILITY 4456 basic_string<char> operator "" s( const char *__str, size_t __len ) 4457 { 4458 return basic_string<char> (__str, __len); 4459 } 4460 4461#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4462 inline _LIBCPP_INLINE_VISIBILITY 4463 basic_string<wchar_t> operator "" s( const wchar_t *__str, size_t __len ) 4464 { 4465 return basic_string<wchar_t> (__str, __len); 4466 } 4467#endif 4468 4469#ifndef _LIBCPP_HAS_NO_CHAR8_T 4470 inline _LIBCPP_INLINE_VISIBILITY 4471 basic_string<char8_t> operator "" s(const char8_t *__str, size_t __len) _NOEXCEPT 4472 { 4473 return basic_string<char8_t> (__str, __len); 4474 } 4475#endif 4476 4477 inline _LIBCPP_INLINE_VISIBILITY 4478 basic_string<char16_t> operator "" s( const char16_t *__str, size_t __len ) 4479 { 4480 return basic_string<char16_t> (__str, __len); 4481 } 4482 4483 inline _LIBCPP_INLINE_VISIBILITY 4484 basic_string<char32_t> operator "" s( const char32_t *__str, size_t __len ) 4485 { 4486 return basic_string<char32_t> (__str, __len); 4487 } 4488 } // namespace string_literals 4489} // namespace literals 4490#endif 4491 4492_LIBCPP_END_NAMESPACE_STD 4493 4494_LIBCPP_POP_MACROS 4495 4496#endif // _LIBCPP_STRING 4497