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 <__config> 522#include <__debug> 523#include <__functional_base> 524#include <__iterator/wrap_iter.h> 525#include <algorithm> 526#include <compare> 527#include <cstdio> // EOF 528#include <cstdlib> 529#include <cstring> 530#include <initializer_list> 531#include <iosfwd> 532#include <iterator> 533#include <memory> 534#include <stdexcept> 535#include <string_view> 536#include <type_traits> 537#include <utility> 538#include <version> 539 540#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 541# include <cwchar> 542#endif 543 544#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 545# include <cstdint> 546#endif 547 548#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 549#pragma GCC system_header 550#endif 551 552_LIBCPP_PUSH_MACROS 553#include <__undef_macros> 554 555 556_LIBCPP_BEGIN_NAMESPACE_STD 557 558// fpos 559 560template <class _StateT> 561class _LIBCPP_TEMPLATE_VIS fpos 562{ 563private: 564 _StateT __st_; 565 streamoff __off_; 566public: 567 _LIBCPP_INLINE_VISIBILITY fpos(streamoff __off = streamoff()) : __st_(), __off_(__off) {} 568 569 _LIBCPP_INLINE_VISIBILITY operator streamoff() const {return __off_;} 570 571 _LIBCPP_INLINE_VISIBILITY _StateT state() const {return __st_;} 572 _LIBCPP_INLINE_VISIBILITY void state(_StateT __st) {__st_ = __st;} 573 574 _LIBCPP_INLINE_VISIBILITY fpos& operator+=(streamoff __off) {__off_ += __off; return *this;} 575 _LIBCPP_INLINE_VISIBILITY fpos operator+ (streamoff __off) const {fpos __t(*this); __t += __off; return __t;} 576 _LIBCPP_INLINE_VISIBILITY fpos& operator-=(streamoff __off) {__off_ -= __off; return *this;} 577 _LIBCPP_INLINE_VISIBILITY fpos operator- (streamoff __off) const {fpos __t(*this); __t -= __off; return __t;} 578}; 579 580template <class _StateT> 581inline _LIBCPP_INLINE_VISIBILITY 582streamoff operator-(const fpos<_StateT>& __x, const fpos<_StateT>& __y) 583 {return streamoff(__x) - streamoff(__y);} 584 585template <class _StateT> 586inline _LIBCPP_INLINE_VISIBILITY 587bool operator==(const fpos<_StateT>& __x, const fpos<_StateT>& __y) 588 {return streamoff(__x) == streamoff(__y);} 589 590template <class _StateT> 591inline _LIBCPP_INLINE_VISIBILITY 592bool operator!=(const fpos<_StateT>& __x, const fpos<_StateT>& __y) 593 {return streamoff(__x) != streamoff(__y);} 594 595// basic_string 596 597template<class _CharT, class _Traits, class _Allocator> 598basic_string<_CharT, _Traits, _Allocator> 599operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, 600 const basic_string<_CharT, _Traits, _Allocator>& __y); 601 602template<class _CharT, class _Traits, class _Allocator> 603basic_string<_CharT, _Traits, _Allocator> 604operator+(const _CharT* __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 605 606template<class _CharT, class _Traits, class _Allocator> 607basic_string<_CharT, _Traits, _Allocator> 608operator+(_CharT __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 609 610template<class _CharT, class _Traits, class _Allocator> 611inline _LIBCPP_INLINE_VISIBILITY 612basic_string<_CharT, _Traits, _Allocator> 613operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); 614 615template<class _CharT, class _Traits, class _Allocator> 616basic_string<_CharT, _Traits, _Allocator> 617operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); 618 619_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS string operator+<char, char_traits<char>, allocator<char> >(char const*, string const&)) 620 621template <class _Iter> 622struct __string_is_trivial_iterator : public false_type {}; 623 624template <class _Tp> 625struct __string_is_trivial_iterator<_Tp*> 626 : public is_arithmetic<_Tp> {}; 627 628template <class _Iter> 629struct __string_is_trivial_iterator<__wrap_iter<_Iter> > 630 : public __string_is_trivial_iterator<_Iter> {}; 631 632template <class _CharT, class _Traits, class _Tp> 633struct __can_be_converted_to_string_view : public _BoolConstant< 634 is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && 635 !is_convertible<const _Tp&, const _CharT*>::value 636 > {}; 637 638#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 639 640template <class _CharT, size_t = sizeof(_CharT)> 641struct __padding 642{ 643 unsigned char __xx[sizeof(_CharT)-1]; 644}; 645 646template <class _CharT> 647struct __padding<_CharT, 1> 648{ 649}; 650 651#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 652 653#ifndef _LIBCPP_HAS_NO_CHAR8_T 654typedef basic_string<char8_t> u8string; 655#endif 656 657#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 658typedef basic_string<char16_t> u16string; 659typedef basic_string<char32_t> u32string; 660#endif 661 662template<class _CharT, class _Traits, class _Allocator> 663class 664 _LIBCPP_TEMPLATE_VIS 665#ifndef _LIBCPP_HAS_NO_CHAR8_T 666 _LIBCPP_PREFERRED_NAME(u8string) 667#endif 668#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 669 _LIBCPP_PREFERRED_NAME(u16string) 670 _LIBCPP_PREFERRED_NAME(u32string) 671#endif 672 basic_string 673{ 674public: 675 typedef basic_string __self; 676 typedef basic_string_view<_CharT, _Traits> __self_view; 677 typedef _Traits traits_type; 678 typedef _CharT value_type; 679 typedef _Allocator allocator_type; 680 typedef allocator_traits<allocator_type> __alloc_traits; 681 typedef typename __alloc_traits::size_type size_type; 682 typedef typename __alloc_traits::difference_type difference_type; 683 typedef value_type& reference; 684 typedef const value_type& const_reference; 685 typedef typename __alloc_traits::pointer pointer; 686 typedef typename __alloc_traits::const_pointer const_pointer; 687 688 static_assert((!is_array<value_type>::value), "Character type of basic_string must not be an array"); 689 static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string must be standard-layout"); 690 static_assert(( is_trivial<value_type>::value), "Character type of basic_string must be trivial"); 691 static_assert(( is_same<_CharT, typename traits_type::char_type>::value), 692 "traits_type::char_type must be the same type as CharT"); 693 static_assert(( is_same<typename allocator_type::value_type, value_type>::value), 694 "Allocator::value_type must be same type as value_type"); 695 696 typedef __wrap_iter<pointer> iterator; 697 typedef __wrap_iter<const_pointer> const_iterator; 698 typedef _VSTD::reverse_iterator<iterator> reverse_iterator; 699 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator; 700 701private: 702 703#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 704 705 struct __long 706 { 707 pointer __data_; 708 size_type __size_; 709 size_type __cap_; 710 }; 711 712#ifdef _LIBCPP_BIG_ENDIAN 713 static const size_type __short_mask = 0x01; 714 static const size_type __long_mask = 0x1ul; 715#else // _LIBCPP_BIG_ENDIAN 716 static const size_type __short_mask = 0x80; 717 static const size_type __long_mask = ~(size_type(~0) >> 1); 718#endif // _LIBCPP_BIG_ENDIAN 719 720 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 721 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 722 723 struct __short 724 { 725 value_type __data_[__min_cap]; 726 struct 727 : __padding<value_type> 728 { 729 unsigned char __size_; 730 }; 731 }; 732 733#else 734 735 struct __long 736 { 737 size_type __cap_; 738 size_type __size_; 739 pointer __data_; 740 }; 741 742#ifdef _LIBCPP_BIG_ENDIAN 743 static const size_type __short_mask = 0x80; 744 static const size_type __long_mask = ~(size_type(~0) >> 1); 745#else // _LIBCPP_BIG_ENDIAN 746 static const size_type __short_mask = 0x01; 747 static const size_type __long_mask = 0x1ul; 748#endif // _LIBCPP_BIG_ENDIAN 749 750 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 751 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 752 753 struct __short 754 { 755 union 756 { 757 unsigned char __size_; 758 value_type __lx; 759 }; 760 value_type __data_[__min_cap]; 761 }; 762 763#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 764 765 union __ulx{__long __lx; __short __lxx;}; 766 767 enum {__n_words = sizeof(__ulx) / sizeof(size_type)}; 768 769 struct __raw 770 { 771 size_type __words[__n_words]; 772 }; 773 774 struct __rep 775 { 776 union 777 { 778 __long __l; 779 __short __s; 780 __raw __r; 781 }; 782 }; 783 784 __compressed_pair<__rep, allocator_type> __r_; 785 786public: 787 _LIBCPP_TEMPLATE_DATA_VIS 788 static const size_type npos = -1; 789 790 _LIBCPP_INLINE_VISIBILITY basic_string() 791 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value); 792 793 _LIBCPP_INLINE_VISIBILITY explicit basic_string(const allocator_type& __a) 794#if _LIBCPP_STD_VER <= 14 795 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value); 796#else 797 _NOEXCEPT; 798#endif 799 800 basic_string(const basic_string& __str); 801 basic_string(const basic_string& __str, const allocator_type& __a); 802 803#ifndef _LIBCPP_CXX03_LANG 804 _LIBCPP_INLINE_VISIBILITY 805 basic_string(basic_string&& __str) 806#if _LIBCPP_STD_VER <= 14 807 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value); 808#else 809 _NOEXCEPT; 810#endif 811 812 _LIBCPP_INLINE_VISIBILITY 813 basic_string(basic_string&& __str, const allocator_type& __a); 814#endif // _LIBCPP_CXX03_LANG 815 816 template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> > 817 _LIBCPP_INLINE_VISIBILITY 818 basic_string(const _CharT* __s) : __r_(__default_init_tag(), __default_init_tag()) { 819 _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*) detected nullptr"); 820 __init(__s, traits_type::length(__s)); 821 _VSTD::__debug_db_insert_c(this); 822 } 823 824 template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> > 825 _LIBCPP_INLINE_VISIBILITY 826 basic_string(const _CharT* __s, const _Allocator& __a); 827 828#if _LIBCPP_STD_VER > 20 829 basic_string(nullptr_t) = delete; 830#endif 831 832 _LIBCPP_INLINE_VISIBILITY 833 basic_string(const _CharT* __s, size_type __n); 834 _LIBCPP_INLINE_VISIBILITY 835 basic_string(const _CharT* __s, size_type __n, const _Allocator& __a); 836 _LIBCPP_INLINE_VISIBILITY 837 basic_string(size_type __n, _CharT __c); 838 839 template <class = __enable_if_t<__is_allocator<_Allocator>::value, nullptr_t> > 840 _LIBCPP_INLINE_VISIBILITY 841 basic_string(size_type __n, _CharT __c, const _Allocator& __a); 842 843 basic_string(const basic_string& __str, size_type __pos, size_type __n, 844 const _Allocator& __a = _Allocator()); 845 _LIBCPP_INLINE_VISIBILITY 846 basic_string(const basic_string& __str, size_type __pos, 847 const _Allocator& __a = _Allocator()); 848 849 template<class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 850 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 851 basic_string(const _Tp& __t, size_type __pos, size_type __n, 852 const allocator_type& __a = allocator_type()); 853 854 template<class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 855 !__is_same_uncvref<_Tp, basic_string>::value> > 856 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 857 explicit basic_string(const _Tp& __t); 858 859 template<class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 860 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 861 explicit basic_string(const _Tp& __t, const allocator_type& __a); 862 863 template<class _InputIterator, class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value> > 864 _LIBCPP_INLINE_VISIBILITY 865 basic_string(_InputIterator __first, _InputIterator __last); 866 template<class _InputIterator, class = __enable_if_t<__is_cpp17_input_iterator<_InputIterator>::value> > 867 _LIBCPP_INLINE_VISIBILITY 868 basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a); 869#ifndef _LIBCPP_CXX03_LANG 870 _LIBCPP_INLINE_VISIBILITY 871 basic_string(initializer_list<_CharT> __il); 872 _LIBCPP_INLINE_VISIBILITY 873 basic_string(initializer_list<_CharT> __il, const _Allocator& __a); 874#endif // _LIBCPP_CXX03_LANG 875 876 inline ~basic_string(); 877 878 _LIBCPP_INLINE_VISIBILITY 879 operator __self_view() const _NOEXCEPT { return __self_view(data(), size()); } 880 881 basic_string& operator=(const basic_string& __str); 882 883 template <class _Tp, class = __enable_if_t<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 884 basic_string& operator=(const _Tp& __t) 885 {__self_view __sv = __t; return assign(__sv);} 886 887#ifndef _LIBCPP_CXX03_LANG 888 _LIBCPP_INLINE_VISIBILITY 889 basic_string& operator=(basic_string&& __str) 890 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)); 891 _LIBCPP_INLINE_VISIBILITY 892 basic_string& operator=(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 893#endif 894 _LIBCPP_INLINE_VISIBILITY basic_string& operator=(const value_type* __s) {return assign(__s);} 895#if _LIBCPP_STD_VER > 20 896 basic_string& operator=(nullptr_t) = delete; 897#endif 898 basic_string& operator=(value_type __c); 899 900#if _LIBCPP_DEBUG_LEVEL == 2 901 _LIBCPP_INLINE_VISIBILITY 902 iterator begin() _NOEXCEPT 903 {return iterator(this, __get_pointer());} 904 _LIBCPP_INLINE_VISIBILITY 905 const_iterator begin() const _NOEXCEPT 906 {return const_iterator(this, __get_pointer());} 907 _LIBCPP_INLINE_VISIBILITY 908 iterator end() _NOEXCEPT 909 {return iterator(this, __get_pointer() + size());} 910 _LIBCPP_INLINE_VISIBILITY 911 const_iterator end() const _NOEXCEPT 912 {return const_iterator(this, __get_pointer() + size());} 913#else 914 _LIBCPP_INLINE_VISIBILITY 915 iterator begin() _NOEXCEPT 916 {return iterator(__get_pointer());} 917 _LIBCPP_INLINE_VISIBILITY 918 const_iterator begin() const _NOEXCEPT 919 {return const_iterator(__get_pointer());} 920 _LIBCPP_INLINE_VISIBILITY 921 iterator end() _NOEXCEPT 922 {return iterator(__get_pointer() + size());} 923 _LIBCPP_INLINE_VISIBILITY 924 const_iterator end() const _NOEXCEPT 925 {return const_iterator(__get_pointer() + size());} 926#endif // _LIBCPP_DEBUG_LEVEL == 2 927 _LIBCPP_INLINE_VISIBILITY 928 reverse_iterator rbegin() _NOEXCEPT 929 {return reverse_iterator(end());} 930 _LIBCPP_INLINE_VISIBILITY 931 const_reverse_iterator rbegin() const _NOEXCEPT 932 {return const_reverse_iterator(end());} 933 _LIBCPP_INLINE_VISIBILITY 934 reverse_iterator rend() _NOEXCEPT 935 {return reverse_iterator(begin());} 936 _LIBCPP_INLINE_VISIBILITY 937 const_reverse_iterator rend() const _NOEXCEPT 938 {return const_reverse_iterator(begin());} 939 940 _LIBCPP_INLINE_VISIBILITY 941 const_iterator cbegin() const _NOEXCEPT 942 {return begin();} 943 _LIBCPP_INLINE_VISIBILITY 944 const_iterator cend() const _NOEXCEPT 945 {return end();} 946 _LIBCPP_INLINE_VISIBILITY 947 const_reverse_iterator crbegin() const _NOEXCEPT 948 {return rbegin();} 949 _LIBCPP_INLINE_VISIBILITY 950 const_reverse_iterator crend() const _NOEXCEPT 951 {return rend();} 952 953 _LIBCPP_INLINE_VISIBILITY size_type size() const _NOEXCEPT 954 {return __is_long() ? __get_long_size() : __get_short_size();} 955 _LIBCPP_INLINE_VISIBILITY size_type length() const _NOEXCEPT {return size();} 956 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT; 957 _LIBCPP_INLINE_VISIBILITY size_type capacity() const _NOEXCEPT 958 {return (__is_long() ? __get_long_cap() 959 : static_cast<size_type>(__min_cap)) - 1;} 960 961 void resize(size_type __n, value_type __c); 962 _LIBCPP_INLINE_VISIBILITY void resize(size_type __n) {resize(__n, value_type());} 963 964 void reserve(size_type __requested_capacity); 965 966#if _LIBCPP_STD_VER > 20 967 template <class _Op> 968 _LIBCPP_HIDE_FROM_ABI constexpr 969 void resize_and_overwrite(size_type __n, _Op __op) { 970 __resize_default_init(__n); 971 __erase_to_end(_VSTD::move(__op)(data(), _LIBCPP_AUTO_CAST(__n))); 972 } 973#endif 974 975 _LIBCPP_INLINE_VISIBILITY void __resize_default_init(size_type __n); 976 977 _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_INLINE_VISIBILITY 978 void reserve() _NOEXCEPT {shrink_to_fit();} 979 _LIBCPP_INLINE_VISIBILITY 980 void shrink_to_fit() _NOEXCEPT; 981 _LIBCPP_INLINE_VISIBILITY 982 void clear() _NOEXCEPT; 983 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 984 bool empty() const _NOEXCEPT {return size() == 0;} 985 986 _LIBCPP_INLINE_VISIBILITY const_reference operator[](size_type __pos) const _NOEXCEPT; 987 _LIBCPP_INLINE_VISIBILITY reference operator[](size_type __pos) _NOEXCEPT; 988 989 const_reference at(size_type __n) const; 990 reference at(size_type __n); 991 992 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(const basic_string& __str) {return append(__str);} 993 994 template <class _Tp> 995 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 996 __enable_if_t 997 < 998 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 999 && !__is_same_uncvref<_Tp, basic_string >::value, 1000 basic_string& 1001 > 1002 operator+=(const _Tp& __t) {__self_view __sv = __t; return append(__sv);} 1003 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(const value_type* __s) {return append(__s);} 1004 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(value_type __c) {push_back(__c); return *this;} 1005#ifndef _LIBCPP_CXX03_LANG 1006 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(initializer_list<value_type> __il) {return append(__il);} 1007#endif // _LIBCPP_CXX03_LANG 1008 1009 _LIBCPP_INLINE_VISIBILITY 1010 basic_string& append(const basic_string& __str); 1011 1012 template <class _Tp> 1013 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1014 __enable_if_t< 1015 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 1016 && !__is_same_uncvref<_Tp, basic_string>::value, 1017 basic_string& 1018 > 1019 append(const _Tp& __t) { __self_view __sv = __t; return append(__sv.data(), __sv.size()); } 1020 basic_string& append(const basic_string& __str, size_type __pos, size_type __n=npos); 1021 1022 template <class _Tp> 1023 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1024 __enable_if_t 1025 < 1026 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 1027 && !__is_same_uncvref<_Tp, basic_string>::value, 1028 basic_string& 1029 > 1030 append(const _Tp& __t, size_type __pos, size_type __n=npos); 1031 basic_string& append(const value_type* __s, size_type __n); 1032 basic_string& append(const value_type* __s); 1033 basic_string& append(size_type __n, value_type __c); 1034 1035 _LIBCPP_INLINE_VISIBILITY 1036 void __append_default_init(size_type __n); 1037 1038 template<class _InputIterator> 1039 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1040 __enable_if_t 1041 < 1042 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 1043 basic_string& 1044 > 1045 _LIBCPP_INLINE_VISIBILITY 1046 append(_InputIterator __first, _InputIterator __last) { 1047 const basic_string __temp(__first, __last, __alloc()); 1048 append(__temp.data(), __temp.size()); 1049 return *this; 1050 } 1051 template<class _ForwardIterator> 1052 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1053 __enable_if_t 1054 < 1055 __is_cpp17_forward_iterator<_ForwardIterator>::value, 1056 basic_string& 1057 > 1058 _LIBCPP_INLINE_VISIBILITY 1059 append(_ForwardIterator __first, _ForwardIterator __last); 1060 1061#ifndef _LIBCPP_CXX03_LANG 1062 _LIBCPP_INLINE_VISIBILITY 1063 basic_string& append(initializer_list<value_type> __il) {return append(__il.begin(), __il.size());} 1064#endif // _LIBCPP_CXX03_LANG 1065 1066 void push_back(value_type __c); 1067 _LIBCPP_INLINE_VISIBILITY 1068 void pop_back(); 1069 _LIBCPP_INLINE_VISIBILITY reference front() _NOEXCEPT; 1070 _LIBCPP_INLINE_VISIBILITY const_reference front() const _NOEXCEPT; 1071 _LIBCPP_INLINE_VISIBILITY reference back() _NOEXCEPT; 1072 _LIBCPP_INLINE_VISIBILITY const_reference back() const _NOEXCEPT; 1073 1074 template <class _Tp> 1075 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1076 __enable_if_t 1077 < 1078 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1079 basic_string& 1080 > 1081 assign(const _Tp & __t) { __self_view __sv = __t; return assign(__sv.data(), __sv.size()); } 1082 _LIBCPP_INLINE_VISIBILITY 1083 basic_string& assign(const basic_string& __str) { return *this = __str; } 1084#ifndef _LIBCPP_CXX03_LANG 1085 _LIBCPP_INLINE_VISIBILITY 1086 basic_string& assign(basic_string&& __str) 1087 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) 1088 {*this = _VSTD::move(__str); return *this;} 1089#endif 1090 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n=npos); 1091 template <class _Tp> 1092 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1093 __enable_if_t 1094 < 1095 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 1096 && !__is_same_uncvref<_Tp, basic_string>::value, 1097 basic_string& 1098 > 1099 assign(const _Tp & __t, size_type __pos, size_type __n=npos); 1100 basic_string& assign(const value_type* __s, size_type __n); 1101 basic_string& assign(const value_type* __s); 1102 basic_string& assign(size_type __n, value_type __c); 1103 template<class _InputIterator> 1104 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1105 __enable_if_t 1106 < 1107 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 1108 basic_string& 1109 > 1110 assign(_InputIterator __first, _InputIterator __last); 1111 template<class _ForwardIterator> 1112 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1113 __enable_if_t 1114 < 1115 __is_cpp17_forward_iterator<_ForwardIterator>::value, 1116 basic_string& 1117 > 1118 assign(_ForwardIterator __first, _ForwardIterator __last); 1119#ifndef _LIBCPP_CXX03_LANG 1120 _LIBCPP_INLINE_VISIBILITY 1121 basic_string& assign(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 1122#endif // _LIBCPP_CXX03_LANG 1123 1124 _LIBCPP_INLINE_VISIBILITY 1125 basic_string& insert(size_type __pos1, const basic_string& __str); 1126 1127 template <class _Tp> 1128 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1129 __enable_if_t 1130 < 1131 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1132 basic_string& 1133 > 1134 insert(size_type __pos1, const _Tp& __t) 1135 { __self_view __sv = __t; return insert(__pos1, __sv.data(), __sv.size()); } 1136 1137 template <class _Tp> 1138 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1139 __enable_if_t 1140 < 1141 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1142 basic_string& 1143 > 1144 insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n=npos); 1145 basic_string& insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n=npos); 1146 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); 1147 basic_string& insert(size_type __pos, const value_type* __s); 1148 basic_string& insert(size_type __pos, size_type __n, value_type __c); 1149 iterator insert(const_iterator __pos, value_type __c); 1150 _LIBCPP_INLINE_VISIBILITY 1151 iterator insert(const_iterator __pos, size_type __n, value_type __c); 1152 template<class _InputIterator> 1153 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1154 __enable_if_t 1155 < 1156 __is_exactly_cpp17_input_iterator<_InputIterator>::value, 1157 iterator 1158 > 1159 insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); 1160 template<class _ForwardIterator> 1161 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1162 __enable_if_t 1163 < 1164 __is_cpp17_forward_iterator<_ForwardIterator>::value, 1165 iterator 1166 > 1167 insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); 1168#ifndef _LIBCPP_CXX03_LANG 1169 _LIBCPP_INLINE_VISIBILITY 1170 iterator insert(const_iterator __pos, initializer_list<value_type> __il) 1171 {return insert(__pos, __il.begin(), __il.end());} 1172#endif // _LIBCPP_CXX03_LANG 1173 1174 basic_string& erase(size_type __pos = 0, size_type __n = npos); 1175 _LIBCPP_INLINE_VISIBILITY 1176 iterator erase(const_iterator __pos); 1177 _LIBCPP_INLINE_VISIBILITY 1178 iterator erase(const_iterator __first, const_iterator __last); 1179 1180 _LIBCPP_INLINE_VISIBILITY 1181 basic_string& replace(size_type __pos1, size_type __n1, 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(size_type __pos1, size_type __n1, const _Tp& __t) { __self_view __sv = __t; return replace(__pos1, __n1, __sv.data(), __sv.size()); } 1191 basic_string& replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2=npos); 1192 template <class _Tp> 1193 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1194 __enable_if_t 1195 < 1196 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1197 basic_string& 1198 > 1199 replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2=npos); 1200 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); 1201 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); 1202 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); 1203 _LIBCPP_INLINE_VISIBILITY 1204 basic_string& replace(const_iterator __i1, const_iterator __i2, const basic_string& __str); 1205 1206 template <class _Tp> 1207 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1208 __enable_if_t 1209 < 1210 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1211 basic_string& 1212 > 1213 replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { __self_view __sv = __t; return replace(__i1 - begin(), __i2 - __i1, __sv); } 1214 1215 _LIBCPP_INLINE_VISIBILITY 1216 basic_string& replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n); 1217 _LIBCPP_INLINE_VISIBILITY 1218 basic_string& replace(const_iterator __i1, const_iterator __i2, const value_type* __s); 1219 _LIBCPP_INLINE_VISIBILITY 1220 basic_string& replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c); 1221 template<class _InputIterator> 1222 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1223 __enable_if_t 1224 < 1225 __is_cpp17_input_iterator<_InputIterator>::value, 1226 basic_string& 1227 > 1228 replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); 1229#ifndef _LIBCPP_CXX03_LANG 1230 _LIBCPP_INLINE_VISIBILITY 1231 basic_string& replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) 1232 {return replace(__i1, __i2, __il.begin(), __il.end());} 1233#endif // _LIBCPP_CXX03_LANG 1234 1235 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; 1236 _LIBCPP_INLINE_VISIBILITY 1237 basic_string substr(size_type __pos = 0, size_type __n = npos) const; 1238 1239 _LIBCPP_INLINE_VISIBILITY 1240 void swap(basic_string& __str) 1241#if _LIBCPP_STD_VER >= 14 1242 _NOEXCEPT; 1243#else 1244 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 1245 __is_nothrow_swappable<allocator_type>::value); 1246#endif 1247 1248 _LIBCPP_INLINE_VISIBILITY 1249 const value_type* c_str() const _NOEXCEPT {return data();} 1250 _LIBCPP_INLINE_VISIBILITY 1251 const value_type* data() const _NOEXCEPT {return _VSTD::__to_address(__get_pointer());} 1252#if _LIBCPP_STD_VER > 14 || defined(_LIBCPP_BUILDING_LIBRARY) 1253 _LIBCPP_INLINE_VISIBILITY 1254 value_type* data() _NOEXCEPT {return _VSTD::__to_address(__get_pointer());} 1255#endif 1256 1257 _LIBCPP_INLINE_VISIBILITY 1258 allocator_type get_allocator() const _NOEXCEPT {return __alloc();} 1259 1260 _LIBCPP_INLINE_VISIBILITY 1261 size_type find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1262 1263 template <class _Tp> 1264 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1265 __enable_if_t 1266 < 1267 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1268 size_type 1269 > 1270 find(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1271 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1272 _LIBCPP_INLINE_VISIBILITY 1273 size_type find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1274 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1275 1276 _LIBCPP_INLINE_VISIBILITY 1277 size_type rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1278 1279 template <class _Tp> 1280 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1281 __enable_if_t 1282 < 1283 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1284 size_type 1285 > 1286 rfind(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1287 size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1288 _LIBCPP_INLINE_VISIBILITY 1289 size_type rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1290 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1291 1292 _LIBCPP_INLINE_VISIBILITY 1293 size_type find_first_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1294 1295 template <class _Tp> 1296 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1297 __enable_if_t 1298 < 1299 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1300 size_type 1301 > 1302 find_first_of(const _Tp& __t, size_type __pos = 0) const _NOEXCEPT; 1303 size_type find_first_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1304 _LIBCPP_INLINE_VISIBILITY 1305 size_type find_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1306 _LIBCPP_INLINE_VISIBILITY 1307 size_type find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1308 1309 _LIBCPP_INLINE_VISIBILITY 1310 size_type find_last_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1311 1312 template <class _Tp> 1313 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1314 __enable_if_t 1315 < 1316 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1317 size_type 1318 > 1319 find_last_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1320 size_type find_last_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1321 _LIBCPP_INLINE_VISIBILITY 1322 size_type find_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1323 _LIBCPP_INLINE_VISIBILITY 1324 size_type find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1325 1326 _LIBCPP_INLINE_VISIBILITY 1327 size_type find_first_not_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1328 1329 template <class _Tp> 1330 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1331 __enable_if_t 1332 < 1333 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1334 size_type 1335 > 1336 find_first_not_of(const _Tp &__t, size_type __pos = 0) const _NOEXCEPT; 1337 size_type find_first_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1338 _LIBCPP_INLINE_VISIBILITY 1339 size_type find_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1340 _LIBCPP_INLINE_VISIBILITY 1341 size_type find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1342 1343 _LIBCPP_INLINE_VISIBILITY 1344 size_type find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1345 1346 template <class _Tp> 1347 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1348 __enable_if_t 1349 < 1350 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1351 size_type 1352 > 1353 find_last_not_of(const _Tp& __t, size_type __pos = npos) const _NOEXCEPT; 1354 size_type find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1355 _LIBCPP_INLINE_VISIBILITY 1356 size_type find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1357 _LIBCPP_INLINE_VISIBILITY 1358 size_type find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1359 1360 _LIBCPP_INLINE_VISIBILITY 1361 int compare(const basic_string& __str) const _NOEXCEPT; 1362 1363 template <class _Tp> 1364 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1365 __enable_if_t 1366 < 1367 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1368 int 1369 > 1370 compare(const _Tp &__t) const _NOEXCEPT; 1371 1372 template <class _Tp> 1373 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1374 __enable_if_t 1375 < 1376 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1377 int 1378 > 1379 compare(size_type __pos1, size_type __n1, const _Tp& __t) const; 1380 1381 _LIBCPP_INLINE_VISIBILITY 1382 int compare(size_type __pos1, size_type __n1, const basic_string& __str) const; 1383 int compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2=npos) const; 1384 1385 template <class _Tp> 1386 inline _LIBCPP_INLINE_VISIBILITY 1387 __enable_if_t 1388 < 1389 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1390 int 1391 > 1392 compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2=npos) const; 1393 int compare(const value_type* __s) const _NOEXCEPT; 1394 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; 1395 int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; 1396 1397#if _LIBCPP_STD_VER > 17 1398 constexpr _LIBCPP_INLINE_VISIBILITY 1399 bool starts_with(__self_view __sv) const noexcept 1400 { return __self_view(data(), size()).starts_with(__sv); } 1401 1402 constexpr _LIBCPP_INLINE_VISIBILITY 1403 bool starts_with(value_type __c) const noexcept 1404 { return !empty() && _Traits::eq(front(), __c); } 1405 1406 constexpr _LIBCPP_INLINE_VISIBILITY 1407 bool starts_with(const value_type* __s) const noexcept 1408 { return starts_with(__self_view(__s)); } 1409 1410 constexpr _LIBCPP_INLINE_VISIBILITY 1411 bool ends_with(__self_view __sv) const noexcept 1412 { return __self_view(data(), size()).ends_with( __sv); } 1413 1414 constexpr _LIBCPP_INLINE_VISIBILITY 1415 bool ends_with(value_type __c) const noexcept 1416 { return !empty() && _Traits::eq(back(), __c); } 1417 1418 constexpr _LIBCPP_INLINE_VISIBILITY 1419 bool ends_with(const value_type* __s) const noexcept 1420 { return ends_with(__self_view(__s)); } 1421#endif 1422 1423#if _LIBCPP_STD_VER > 20 1424 constexpr _LIBCPP_INLINE_VISIBILITY 1425 bool contains(__self_view __sv) const noexcept 1426 { return __self_view(data(), size()).contains(__sv); } 1427 1428 constexpr _LIBCPP_INLINE_VISIBILITY 1429 bool contains(value_type __c) const noexcept 1430 { return __self_view(data(), size()).contains(__c); } 1431 1432 constexpr _LIBCPP_INLINE_VISIBILITY 1433 bool contains(const value_type* __s) const 1434 { return __self_view(data(), size()).contains(__s); } 1435#endif 1436 1437 _LIBCPP_INLINE_VISIBILITY bool __invariants() const; 1438 1439 _LIBCPP_INLINE_VISIBILITY void __clear_and_shrink() _NOEXCEPT; 1440 1441 _LIBCPP_INLINE_VISIBILITY void __shrink_or_extend(size_type __target_capacity); 1442 1443 _LIBCPP_INLINE_VISIBILITY 1444 bool __is_long() const _NOEXCEPT 1445 {return bool(__r_.first().__s.__size_ & __short_mask);} 1446 1447#if _LIBCPP_DEBUG_LEVEL == 2 1448 1449 bool __dereferenceable(const const_iterator* __i) const; 1450 bool __decrementable(const const_iterator* __i) const; 1451 bool __addable(const const_iterator* __i, ptrdiff_t __n) const; 1452 bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const; 1453 1454#endif // _LIBCPP_DEBUG_LEVEL == 2 1455 1456private: 1457 _LIBCPP_CONSTEXPR _LIBCPP_HIDE_FROM_ABI static bool __fits_in_sso(size_type __sz) { 1458 // SSO is disabled during constant evaluation because `__is_long` isn't constexpr friendly 1459 return !__libcpp_is_constant_evaluated() && (__sz < __min_cap); 1460 } 1461 1462 _LIBCPP_INLINE_VISIBILITY 1463 allocator_type& __alloc() _NOEXCEPT 1464 {return __r_.second();} 1465 _LIBCPP_INLINE_VISIBILITY 1466 const allocator_type& __alloc() const _NOEXCEPT 1467 {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" 2813 " referring to this string"); 2814 2815 size_type __ip = static_cast<size_type>(__pos - begin()); 2816 size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last)); 2817 if (__n) 2818 { 2819 if (__string_is_trivial_iterator<_ForwardIterator>::value && 2820 !__addr_in_range(*__first)) 2821 { 2822 size_type __sz = size(); 2823 size_type __cap = capacity(); 2824 value_type* __p; 2825 if (__cap - __sz >= __n) 2826 { 2827 __p = _VSTD::__to_address(__get_pointer()); 2828 size_type __n_move = __sz - __ip; 2829 if (__n_move != 0) 2830 traits_type::move(__p + __ip + __n, __p + __ip, __n_move); 2831 } 2832 else 2833 { 2834 __grow_by(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); 2835 __p = _VSTD::__to_address(__get_long_pointer()); 2836 } 2837 __sz += __n; 2838 __set_size(__sz); 2839 traits_type::assign(__p[__sz], value_type()); 2840 for (__p += __ip; __first != __last; ++__p, (void) ++__first) 2841 traits_type::assign(*__p, *__first); 2842 } 2843 else 2844 { 2845 const basic_string __temp(__first, __last, __alloc()); 2846 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 2847 } 2848 } 2849 return begin() + __ip; 2850} 2851 2852template <class _CharT, class _Traits, class _Allocator> 2853inline 2854basic_string<_CharT, _Traits, _Allocator>& 2855basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str) 2856{ 2857 return insert(__pos1, __str.data(), __str.size()); 2858} 2859 2860template <class _CharT, class _Traits, class _Allocator> 2861basic_string<_CharT, _Traits, _Allocator>& 2862basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str, 2863 size_type __pos2, size_type __n) 2864{ 2865 size_type __str_sz = __str.size(); 2866 if (__pos2 > __str_sz) 2867 __throw_out_of_range(); 2868 return insert(__pos1, __str.data() + __pos2, _VSTD::min(__n, __str_sz - __pos2)); 2869} 2870 2871template <class _CharT, class _Traits, class _Allocator> 2872template <class _Tp> 2873__enable_if_t 2874< 2875 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2876 basic_string<_CharT, _Traits, _Allocator>& 2877> 2878basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const _Tp& __t, 2879 size_type __pos2, size_type __n) 2880{ 2881 __self_view __sv = __t; 2882 size_type __str_sz = __sv.size(); 2883 if (__pos2 > __str_sz) 2884 __throw_out_of_range(); 2885 return insert(__pos1, __sv.data() + __pos2, _VSTD::min(__n, __str_sz - __pos2)); 2886} 2887 2888template <class _CharT, class _Traits, class _Allocator> 2889basic_string<_CharT, _Traits, _Allocator>& 2890basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) 2891{ 2892 _LIBCPP_ASSERT(__s != nullptr, "string::insert received nullptr"); 2893 return insert(__pos, __s, traits_type::length(__s)); 2894} 2895 2896template <class _CharT, class _Traits, class _Allocator> 2897typename basic_string<_CharT, _Traits, _Allocator>::iterator 2898basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) 2899{ 2900 size_type __ip = static_cast<size_type>(__pos - begin()); 2901 size_type __sz = size(); 2902 size_type __cap = capacity(); 2903 value_type* __p; 2904 if (__cap == __sz) 2905 { 2906 __grow_by(__cap, 1, __sz, __ip, 0, 1); 2907 __p = _VSTD::__to_address(__get_long_pointer()); 2908 } 2909 else 2910 { 2911 __p = _VSTD::__to_address(__get_pointer()); 2912 size_type __n_move = __sz - __ip; 2913 if (__n_move != 0) 2914 traits_type::move(__p + __ip + 1, __p + __ip, __n_move); 2915 } 2916 traits_type::assign(__p[__ip], __c); 2917 traits_type::assign(__p[++__sz], value_type()); 2918 __set_size(__sz); 2919 return begin() + static_cast<difference_type>(__ip); 2920} 2921 2922template <class _CharT, class _Traits, class _Allocator> 2923inline 2924typename basic_string<_CharT, _Traits, _Allocator>::iterator 2925basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, size_type __n, value_type __c) 2926{ 2927 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2928 "string::insert(iterator, n, value) called with an iterator not" 2929 " referring to this string"); 2930 difference_type __p = __pos - begin(); 2931 insert(static_cast<size_type>(__p), __n, __c); 2932 return begin() + __p; 2933} 2934 2935// replace 2936 2937template <class _CharT, class _Traits, class _Allocator> 2938basic_string<_CharT, _Traits, _Allocator>& 2939basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2) 2940 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 2941{ 2942 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); 2943 size_type __sz = size(); 2944 if (__pos > __sz) 2945 __throw_out_of_range(); 2946 __n1 = _VSTD::min(__n1, __sz - __pos); 2947 size_type __cap = capacity(); 2948 if (__cap - __sz + __n1 >= __n2) 2949 { 2950 value_type* __p = _VSTD::__to_address(__get_pointer()); 2951 if (__n1 != __n2) 2952 { 2953 size_type __n_move = __sz - __pos - __n1; 2954 if (__n_move != 0) 2955 { 2956 if (__n1 > __n2) 2957 { 2958 traits_type::move(__p + __pos, __s, __n2); 2959 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2960 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 2961 } 2962 if (__p + __pos < __s && __s < __p + __sz) 2963 { 2964 if (__p + __pos + __n1 <= __s) 2965 __s += __n2 - __n1; 2966 else // __p + __pos < __s < __p + __pos + __n1 2967 { 2968 traits_type::move(__p + __pos, __s, __n1); 2969 __pos += __n1; 2970 __s += __n2; 2971 __n2 -= __n1; 2972 __n1 = 0; 2973 } 2974 } 2975 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2976 } 2977 } 2978 traits_type::move(__p + __pos, __s, __n2); 2979 return __null_terminate_at(__p, __sz + (__n2 - __n1)); 2980 } 2981 else 2982 __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); 2983 return *this; 2984} 2985 2986template <class _CharT, class _Traits, class _Allocator> 2987basic_string<_CharT, _Traits, _Allocator>& 2988basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) 2989{ 2990 size_type __sz = size(); 2991 if (__pos > __sz) 2992 __throw_out_of_range(); 2993 __n1 = _VSTD::min(__n1, __sz - __pos); 2994 size_type __cap = capacity(); 2995 value_type* __p; 2996 if (__cap - __sz + __n1 >= __n2) 2997 { 2998 __p = _VSTD::__to_address(__get_pointer()); 2999 if (__n1 != __n2) 3000 { 3001 size_type __n_move = __sz - __pos - __n1; 3002 if (__n_move != 0) 3003 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 3004 } 3005 } 3006 else 3007 { 3008 __grow_by(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); 3009 __p = _VSTD::__to_address(__get_long_pointer()); 3010 } 3011 traits_type::assign(__p + __pos, __n2, __c); 3012 return __null_terminate_at(__p, __sz - (__n1 - __n2)); 3013} 3014 3015template <class _CharT, class _Traits, class _Allocator> 3016template<class _InputIterator> 3017__enable_if_t 3018< 3019 __is_cpp17_input_iterator<_InputIterator>::value, 3020 basic_string<_CharT, _Traits, _Allocator>& 3021> 3022basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, 3023 _InputIterator __j1, _InputIterator __j2) 3024{ 3025 const basic_string __temp(__j1, __j2, __alloc()); 3026 return replace(__i1, __i2, __temp); 3027} 3028 3029template <class _CharT, class _Traits, class _Allocator> 3030inline 3031basic_string<_CharT, _Traits, _Allocator>& 3032basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str) 3033{ 3034 return replace(__pos1, __n1, __str.data(), __str.size()); 3035} 3036 3037template <class _CharT, class _Traits, class _Allocator> 3038basic_string<_CharT, _Traits, _Allocator>& 3039basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str, 3040 size_type __pos2, size_type __n2) 3041{ 3042 size_type __str_sz = __str.size(); 3043 if (__pos2 > __str_sz) 3044 __throw_out_of_range(); 3045 return replace(__pos1, __n1, __str.data() + __pos2, _VSTD::min(__n2, __str_sz - __pos2)); 3046} 3047 3048template <class _CharT, class _Traits, class _Allocator> 3049template <class _Tp> 3050__enable_if_t 3051< 3052 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3053 basic_string<_CharT, _Traits, _Allocator>& 3054> 3055basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const _Tp& __t, 3056 size_type __pos2, size_type __n2) 3057{ 3058 __self_view __sv = __t; 3059 size_type __str_sz = __sv.size(); 3060 if (__pos2 > __str_sz) 3061 __throw_out_of_range(); 3062 return replace(__pos1, __n1, __sv.data() + __pos2, _VSTD::min(__n2, __str_sz - __pos2)); 3063} 3064 3065template <class _CharT, class _Traits, class _Allocator> 3066basic_string<_CharT, _Traits, _Allocator>& 3067basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) 3068{ 3069 _LIBCPP_ASSERT(__s != nullptr, "string::replace received nullptr"); 3070 return replace(__pos, __n1, __s, traits_type::length(__s)); 3071} 3072 3073template <class _CharT, class _Traits, class _Allocator> 3074inline 3075basic_string<_CharT, _Traits, _Allocator>& 3076basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) 3077{ 3078 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), 3079 __str.data(), __str.size()); 3080} 3081 3082template <class _CharT, class _Traits, class _Allocator> 3083inline 3084basic_string<_CharT, _Traits, _Allocator>& 3085basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) 3086{ 3087 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); 3088} 3089 3090template <class _CharT, class _Traits, class _Allocator> 3091inline 3092basic_string<_CharT, _Traits, _Allocator>& 3093basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const value_type* __s) 3094{ 3095 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); 3096} 3097 3098template <class _CharT, class _Traits, class _Allocator> 3099inline 3100basic_string<_CharT, _Traits, _Allocator>& 3101basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) 3102{ 3103 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); 3104} 3105 3106// erase 3107 3108// 'externally instantiated' erase() implementation, called when __n != npos. 3109// Does not check __pos against size() 3110template <class _CharT, class _Traits, class _Allocator> 3111void 3112basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move( 3113 size_type __pos, size_type __n) 3114{ 3115 if (__n) 3116 { 3117 size_type __sz = size(); 3118 value_type* __p = _VSTD::__to_address(__get_pointer()); 3119 __n = _VSTD::min(__n, __sz - __pos); 3120 size_type __n_move = __sz - __pos - __n; 3121 if (__n_move != 0) 3122 traits_type::move(__p + __pos, __p + __pos + __n, __n_move); 3123 __null_terminate_at(__p, __sz - __n); 3124 } 3125} 3126 3127template <class _CharT, class _Traits, class _Allocator> 3128basic_string<_CharT, _Traits, _Allocator>& 3129basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, 3130 size_type __n) { 3131 if (__pos > size()) 3132 __throw_out_of_range(); 3133 if (__n == npos) { 3134 __erase_to_end(__pos); 3135 } else { 3136 __erase_external_with_move(__pos, __n); 3137 } 3138 return *this; 3139} 3140 3141template <class _CharT, class _Traits, class _Allocator> 3142inline 3143typename basic_string<_CharT, _Traits, _Allocator>::iterator 3144basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) 3145{ 3146 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 3147 "string::erase(iterator) called with an iterator not" 3148 " referring to this string"); 3149 3150 _LIBCPP_ASSERT(__pos != end(), "string::erase(iterator) called with a non-dereferenceable iterator"); 3151 iterator __b = begin(); 3152 size_type __r = static_cast<size_type>(__pos - __b); 3153 erase(__r, 1); 3154 return __b + static_cast<difference_type>(__r); 3155} 3156 3157template <class _CharT, class _Traits, class _Allocator> 3158inline 3159typename basic_string<_CharT, _Traits, _Allocator>::iterator 3160basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) 3161{ 3162 _LIBCPP_DEBUG_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this, 3163 "string::erase(iterator, iterator) called with an iterator not" 3164 " referring to this string"); 3165 3166 _LIBCPP_ASSERT(__first <= __last, "string::erase(first, last) called with invalid range"); 3167 iterator __b = begin(); 3168 size_type __r = static_cast<size_type>(__first - __b); 3169 erase(__r, static_cast<size_type>(__last - __first)); 3170 return __b + static_cast<difference_type>(__r); 3171} 3172 3173template <class _CharT, class _Traits, class _Allocator> 3174inline 3175void 3176basic_string<_CharT, _Traits, _Allocator>::pop_back() 3177{ 3178 _LIBCPP_ASSERT(!empty(), "string::pop_back(): string is already empty"); 3179 __erase_to_end(size() - 1); 3180} 3181 3182template <class _CharT, class _Traits, class _Allocator> 3183inline 3184void 3185basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT 3186{ 3187 __invalidate_all_iterators(); 3188 if (__is_long()) 3189 { 3190 traits_type::assign(*__get_long_pointer(), value_type()); 3191 __set_long_size(0); 3192 } 3193 else 3194 { 3195 traits_type::assign(*__get_short_pointer(), value_type()); 3196 __set_short_size(0); 3197 } 3198} 3199 3200template <class _CharT, class _Traits, class _Allocator> 3201inline 3202void 3203basic_string<_CharT, _Traits, _Allocator>::__erase_to_end(size_type __pos) 3204{ 3205 __null_terminate_at(_VSTD::__to_address(__get_pointer()), __pos); 3206} 3207 3208template <class _CharT, class _Traits, class _Allocator> 3209void 3210basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) 3211{ 3212 size_type __sz = size(); 3213 if (__n > __sz) 3214 append(__n - __sz, __c); 3215 else 3216 __erase_to_end(__n); 3217} 3218 3219template <class _CharT, class _Traits, class _Allocator> 3220inline void 3221basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) 3222{ 3223 size_type __sz = size(); 3224 if (__n > __sz) { 3225 __append_default_init(__n - __sz); 3226 } else 3227 __erase_to_end(__n); 3228} 3229 3230template <class _CharT, class _Traits, class _Allocator> 3231inline 3232typename basic_string<_CharT, _Traits, _Allocator>::size_type 3233basic_string<_CharT, _Traits, _Allocator>::max_size() const _NOEXCEPT 3234{ 3235 size_type __m = __alloc_traits::max_size(__alloc()); 3236#ifdef _LIBCPP_BIG_ENDIAN 3237 return (__m <= ~__long_mask ? __m : __m/2) - __alignment; 3238#else 3239 return __m - __alignment; 3240#endif 3241} 3242 3243template <class _CharT, class _Traits, class _Allocator> 3244void 3245basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __requested_capacity) 3246{ 3247 if (__requested_capacity > max_size()) 3248 __throw_length_error(); 3249 3250 // Make sure reserve(n) never shrinks. This is technically only required in C++20 3251 // and later (since P0966R1), however we provide consistent behavior in all Standard 3252 // modes because this function is instantiated in the shared library. 3253 if (__requested_capacity <= capacity()) 3254 return; 3255 3256 size_type __target_capacity = _VSTD::max(__requested_capacity, size()); 3257 __target_capacity = __recommend(__target_capacity); 3258 if (__target_capacity == capacity()) return; 3259 3260 __shrink_or_extend(__target_capacity); 3261} 3262 3263template <class _CharT, class _Traits, class _Allocator> 3264inline 3265void 3266basic_string<_CharT, _Traits, _Allocator>::shrink_to_fit() _NOEXCEPT 3267{ 3268 size_type __target_capacity = __recommend(size()); 3269 if (__target_capacity == capacity()) return; 3270 3271 __shrink_or_extend(__target_capacity); 3272} 3273 3274template <class _CharT, class _Traits, class _Allocator> 3275inline 3276void 3277basic_string<_CharT, _Traits, _Allocator>::__shrink_or_extend(size_type __target_capacity) 3278{ 3279 size_type __cap = capacity(); 3280 size_type __sz = size(); 3281 3282 pointer __new_data, __p; 3283 bool __was_long, __now_long; 3284 if (__target_capacity == __min_cap - 1) 3285 { 3286 __was_long = true; 3287 __now_long = false; 3288 __new_data = __get_short_pointer(); 3289 __p = __get_long_pointer(); 3290 } 3291 else 3292 { 3293 if (__target_capacity > __cap) 3294 __new_data = __alloc_traits::allocate(__alloc(), __target_capacity+1); 3295 else 3296 { 3297 #ifndef _LIBCPP_NO_EXCEPTIONS 3298 try 3299 { 3300 #endif // _LIBCPP_NO_EXCEPTIONS 3301 __new_data = __alloc_traits::allocate(__alloc(), __target_capacity+1); 3302 #ifndef _LIBCPP_NO_EXCEPTIONS 3303 } 3304 catch (...) 3305 { 3306 return; 3307 } 3308 #else // _LIBCPP_NO_EXCEPTIONS 3309 if (__new_data == nullptr) 3310 return; 3311 #endif // _LIBCPP_NO_EXCEPTIONS 3312 } 3313 __now_long = true; 3314 __was_long = __is_long(); 3315 __p = __get_pointer(); 3316 } 3317 traits_type::copy(_VSTD::__to_address(__new_data), 3318 _VSTD::__to_address(__p), size()+1); 3319 if (__was_long) 3320 __alloc_traits::deallocate(__alloc(), __p, __cap+1); 3321 if (__now_long) 3322 { 3323 __set_long_cap(__target_capacity+1); 3324 __set_long_size(__sz); 3325 __set_long_pointer(__new_data); 3326 } 3327 else 3328 __set_short_size(__sz); 3329 __invalidate_all_iterators(); 3330} 3331 3332template <class _CharT, class _Traits, class _Allocator> 3333inline 3334typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3335basic_string<_CharT, _Traits, _Allocator>::operator[](size_type __pos) const _NOEXCEPT 3336{ 3337 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 3338 return *(data() + __pos); 3339} 3340 3341template <class _CharT, class _Traits, class _Allocator> 3342inline 3343typename basic_string<_CharT, _Traits, _Allocator>::reference 3344basic_string<_CharT, _Traits, _Allocator>::operator[](size_type __pos) _NOEXCEPT 3345{ 3346 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 3347 return *(__get_pointer() + __pos); 3348} 3349 3350template <class _CharT, class _Traits, class _Allocator> 3351typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3352basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const 3353{ 3354 if (__n >= size()) 3355 __throw_out_of_range(); 3356 return (*this)[__n]; 3357} 3358 3359template <class _CharT, class _Traits, class _Allocator> 3360typename basic_string<_CharT, _Traits, _Allocator>::reference 3361basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) 3362{ 3363 if (__n >= size()) 3364 __throw_out_of_range(); 3365 return (*this)[__n]; 3366} 3367 3368template <class _CharT, class _Traits, class _Allocator> 3369inline 3370typename basic_string<_CharT, _Traits, _Allocator>::reference 3371basic_string<_CharT, _Traits, _Allocator>::front() _NOEXCEPT 3372{ 3373 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 3374 return *__get_pointer(); 3375} 3376 3377template <class _CharT, class _Traits, class _Allocator> 3378inline 3379typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3380basic_string<_CharT, _Traits, _Allocator>::front() const _NOEXCEPT 3381{ 3382 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 3383 return *data(); 3384} 3385 3386template <class _CharT, class _Traits, class _Allocator> 3387inline 3388typename basic_string<_CharT, _Traits, _Allocator>::reference 3389basic_string<_CharT, _Traits, _Allocator>::back() _NOEXCEPT 3390{ 3391 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 3392 return *(__get_pointer() + size() - 1); 3393} 3394 3395template <class _CharT, class _Traits, class _Allocator> 3396inline 3397typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3398basic_string<_CharT, _Traits, _Allocator>::back() const _NOEXCEPT 3399{ 3400 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 3401 return *(data() + size() - 1); 3402} 3403 3404template <class _CharT, class _Traits, class _Allocator> 3405typename basic_string<_CharT, _Traits, _Allocator>::size_type 3406basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const 3407{ 3408 size_type __sz = size(); 3409 if (__pos > __sz) 3410 __throw_out_of_range(); 3411 size_type __rlen = _VSTD::min(__n, __sz - __pos); 3412 traits_type::copy(__s, data() + __pos, __rlen); 3413 return __rlen; 3414} 3415 3416template <class _CharT, class _Traits, class _Allocator> 3417inline 3418basic_string<_CharT, _Traits, _Allocator> 3419basic_string<_CharT, _Traits, _Allocator>::substr(size_type __pos, size_type __n) const 3420{ 3421 return basic_string(*this, __pos, __n, __alloc()); 3422} 3423 3424template <class _CharT, class _Traits, class _Allocator> 3425inline 3426void 3427basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) 3428#if _LIBCPP_STD_VER >= 14 3429 _NOEXCEPT 3430#else 3431 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 3432 __is_nothrow_swappable<allocator_type>::value) 3433#endif 3434{ 3435#if _LIBCPP_DEBUG_LEVEL == 2 3436 if (!__libcpp_is_constant_evaluated()) { 3437 if (!__is_long()) 3438 __get_db()->__invalidate_all(this); 3439 if (!__str.__is_long()) 3440 __get_db()->__invalidate_all(&__str); 3441 __get_db()->swap(this, &__str); 3442 } 3443#endif 3444 _LIBCPP_ASSERT( 3445 __alloc_traits::propagate_on_container_swap::value || 3446 __alloc_traits::is_always_equal::value || 3447 __alloc() == __str.__alloc(), "swapping non-equal allocators"); 3448 _VSTD::swap(__r_.first(), __str.__r_.first()); 3449 _VSTD::__swap_allocator(__alloc(), __str.__alloc()); 3450} 3451 3452// find 3453 3454template <class _Traits> 3455struct _LIBCPP_HIDDEN __traits_eq 3456{ 3457 typedef typename _Traits::char_type char_type; 3458 _LIBCPP_INLINE_VISIBILITY 3459 bool operator()(const char_type& __x, const char_type& __y) _NOEXCEPT 3460 {return _Traits::eq(__x, __y);} 3461}; 3462 3463template<class _CharT, class _Traits, class _Allocator> 3464typename basic_string<_CharT, _Traits, _Allocator>::size_type 3465basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3466 size_type __pos, 3467 size_type __n) const _NOEXCEPT 3468{ 3469 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find(): received nullptr"); 3470 return __str_find<value_type, size_type, traits_type, npos> 3471 (data(), size(), __s, __pos, __n); 3472} 3473 3474template<class _CharT, class _Traits, class _Allocator> 3475inline 3476typename basic_string<_CharT, _Traits, _Allocator>::size_type 3477basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, 3478 size_type __pos) const _NOEXCEPT 3479{ 3480 return __str_find<value_type, size_type, traits_type, npos> 3481 (data(), size(), __str.data(), __pos, __str.size()); 3482} 3483 3484template<class _CharT, class _Traits, class _Allocator> 3485template <class _Tp> 3486__enable_if_t 3487< 3488 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3489 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3490> 3491basic_string<_CharT, _Traits, _Allocator>::find(const _Tp &__t, 3492 size_type __pos) const _NOEXCEPT 3493{ 3494 __self_view __sv = __t; 3495 return __str_find<value_type, size_type, traits_type, npos> 3496 (data(), size(), __sv.data(), __pos, __sv.size()); 3497} 3498 3499template<class _CharT, class _Traits, class _Allocator> 3500inline 3501typename basic_string<_CharT, _Traits, _Allocator>::size_type 3502basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3503 size_type __pos) const _NOEXCEPT 3504{ 3505 _LIBCPP_ASSERT(__s != nullptr, "string::find(): received nullptr"); 3506 return __str_find<value_type, size_type, traits_type, npos> 3507 (data(), size(), __s, __pos, traits_type::length(__s)); 3508} 3509 3510template<class _CharT, class _Traits, class _Allocator> 3511typename basic_string<_CharT, _Traits, _Allocator>::size_type 3512basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, 3513 size_type __pos) const _NOEXCEPT 3514{ 3515 return __str_find<value_type, size_type, traits_type, npos> 3516 (data(), size(), __c, __pos); 3517} 3518 3519// rfind 3520 3521template<class _CharT, class _Traits, class _Allocator> 3522typename basic_string<_CharT, _Traits, _Allocator>::size_type 3523basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3524 size_type __pos, 3525 size_type __n) const _NOEXCEPT 3526{ 3527 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); 3528 return __str_rfind<value_type, size_type, traits_type, npos> 3529 (data(), size(), __s, __pos, __n); 3530} 3531 3532template<class _CharT, class _Traits, class _Allocator> 3533inline 3534typename basic_string<_CharT, _Traits, _Allocator>::size_type 3535basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, 3536 size_type __pos) const _NOEXCEPT 3537{ 3538 return __str_rfind<value_type, size_type, traits_type, npos> 3539 (data(), size(), __str.data(), __pos, __str.size()); 3540} 3541 3542template<class _CharT, class _Traits, class _Allocator> 3543template <class _Tp> 3544__enable_if_t 3545< 3546 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3547 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3548> 3549basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, 3550 size_type __pos) const _NOEXCEPT 3551{ 3552 __self_view __sv = __t; 3553 return __str_rfind<value_type, size_type, traits_type, npos> 3554 (data(), size(), __sv.data(), __pos, __sv.size()); 3555} 3556 3557template<class _CharT, class _Traits, class _Allocator> 3558inline 3559typename basic_string<_CharT, _Traits, _Allocator>::size_type 3560basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3561 size_type __pos) const _NOEXCEPT 3562{ 3563 _LIBCPP_ASSERT(__s != nullptr, "string::rfind(): received nullptr"); 3564 return __str_rfind<value_type, size_type, traits_type, npos> 3565 (data(), size(), __s, __pos, traits_type::length(__s)); 3566} 3567 3568template<class _CharT, class _Traits, class _Allocator> 3569typename basic_string<_CharT, _Traits, _Allocator>::size_type 3570basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, 3571 size_type __pos) const _NOEXCEPT 3572{ 3573 return __str_rfind<value_type, size_type, traits_type, npos> 3574 (data(), size(), __c, __pos); 3575} 3576 3577// find_first_of 3578 3579template<class _CharT, class _Traits, class _Allocator> 3580typename basic_string<_CharT, _Traits, _Allocator>::size_type 3581basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3582 size_type __pos, 3583 size_type __n) const _NOEXCEPT 3584{ 3585 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); 3586 return __str_find_first_of<value_type, size_type, traits_type, npos> 3587 (data(), size(), __s, __pos, __n); 3588} 3589 3590template<class _CharT, class _Traits, class _Allocator> 3591inline 3592typename basic_string<_CharT, _Traits, _Allocator>::size_type 3593basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, 3594 size_type __pos) const _NOEXCEPT 3595{ 3596 return __str_find_first_of<value_type, size_type, traits_type, npos> 3597 (data(), size(), __str.data(), __pos, __str.size()); 3598} 3599 3600template<class _CharT, class _Traits, class _Allocator> 3601template <class _Tp> 3602__enable_if_t 3603< 3604 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3605 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3606> 3607basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, 3608 size_type __pos) const _NOEXCEPT 3609{ 3610 __self_view __sv = __t; 3611 return __str_find_first_of<value_type, size_type, traits_type, npos> 3612 (data(), size(), __sv.data(), __pos, __sv.size()); 3613} 3614 3615template<class _CharT, class _Traits, class _Allocator> 3616inline 3617typename basic_string<_CharT, _Traits, _Allocator>::size_type 3618basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3619 size_type __pos) const _NOEXCEPT 3620{ 3621 _LIBCPP_ASSERT(__s != nullptr, "string::find_first_of(): received nullptr"); 3622 return __str_find_first_of<value_type, size_type, traits_type, npos> 3623 (data(), size(), __s, __pos, traits_type::length(__s)); 3624} 3625 3626template<class _CharT, class _Traits, class _Allocator> 3627inline 3628typename basic_string<_CharT, _Traits, _Allocator>::size_type 3629basic_string<_CharT, _Traits, _Allocator>::find_first_of(value_type __c, 3630 size_type __pos) const _NOEXCEPT 3631{ 3632 return find(__c, __pos); 3633} 3634 3635// find_last_of 3636 3637template<class _CharT, class _Traits, class _Allocator> 3638typename basic_string<_CharT, _Traits, _Allocator>::size_type 3639basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3640 size_type __pos, 3641 size_type __n) const _NOEXCEPT 3642{ 3643 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); 3644 return __str_find_last_of<value_type, size_type, traits_type, npos> 3645 (data(), size(), __s, __pos, __n); 3646} 3647 3648template<class _CharT, class _Traits, class _Allocator> 3649inline 3650typename basic_string<_CharT, _Traits, _Allocator>::size_type 3651basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, 3652 size_type __pos) const _NOEXCEPT 3653{ 3654 return __str_find_last_of<value_type, size_type, traits_type, npos> 3655 (data(), size(), __str.data(), __pos, __str.size()); 3656} 3657 3658template<class _CharT, class _Traits, class _Allocator> 3659template <class _Tp> 3660__enable_if_t 3661< 3662 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3663 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3664> 3665basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, 3666 size_type __pos) const _NOEXCEPT 3667{ 3668 __self_view __sv = __t; 3669 return __str_find_last_of<value_type, size_type, traits_type, npos> 3670 (data(), size(), __sv.data(), __pos, __sv.size()); 3671} 3672 3673template<class _CharT, class _Traits, class _Allocator> 3674inline 3675typename basic_string<_CharT, _Traits, _Allocator>::size_type 3676basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3677 size_type __pos) const _NOEXCEPT 3678{ 3679 _LIBCPP_ASSERT(__s != nullptr, "string::find_last_of(): received nullptr"); 3680 return __str_find_last_of<value_type, size_type, traits_type, npos> 3681 (data(), size(), __s, __pos, traits_type::length(__s)); 3682} 3683 3684template<class _CharT, class _Traits, class _Allocator> 3685inline 3686typename basic_string<_CharT, _Traits, _Allocator>::size_type 3687basic_string<_CharT, _Traits, _Allocator>::find_last_of(value_type __c, 3688 size_type __pos) const _NOEXCEPT 3689{ 3690 return rfind(__c, __pos); 3691} 3692 3693// find_first_not_of 3694 3695template<class _CharT, class _Traits, class _Allocator> 3696typename basic_string<_CharT, _Traits, _Allocator>::size_type 3697basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3698 size_type __pos, 3699 size_type __n) const _NOEXCEPT 3700{ 3701 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); 3702 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3703 (data(), size(), __s, __pos, __n); 3704} 3705 3706template<class _CharT, class _Traits, class _Allocator> 3707inline 3708typename basic_string<_CharT, _Traits, _Allocator>::size_type 3709basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const basic_string& __str, 3710 size_type __pos) const _NOEXCEPT 3711{ 3712 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3713 (data(), size(), __str.data(), __pos, __str.size()); 3714} 3715 3716template<class _CharT, class _Traits, class _Allocator> 3717template <class _Tp> 3718__enable_if_t 3719< 3720 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3721 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3722> 3723basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, 3724 size_type __pos) const _NOEXCEPT 3725{ 3726 __self_view __sv = __t; 3727 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3728 (data(), size(), __sv.data(), __pos, __sv.size()); 3729} 3730 3731template<class _CharT, class _Traits, class _Allocator> 3732inline 3733typename basic_string<_CharT, _Traits, _Allocator>::size_type 3734basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3735 size_type __pos) const _NOEXCEPT 3736{ 3737 _LIBCPP_ASSERT(__s != nullptr, "string::find_first_not_of(): received nullptr"); 3738 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3739 (data(), size(), __s, __pos, traits_type::length(__s)); 3740} 3741 3742template<class _CharT, class _Traits, class _Allocator> 3743inline 3744typename basic_string<_CharT, _Traits, _Allocator>::size_type 3745basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(value_type __c, 3746 size_type __pos) const _NOEXCEPT 3747{ 3748 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3749 (data(), size(), __c, __pos); 3750} 3751 3752// find_last_not_of 3753 3754template<class _CharT, class _Traits, class _Allocator> 3755typename basic_string<_CharT, _Traits, _Allocator>::size_type 3756basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3757 size_type __pos, 3758 size_type __n) const _NOEXCEPT 3759{ 3760 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); 3761 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3762 (data(), size(), __s, __pos, __n); 3763} 3764 3765template<class _CharT, class _Traits, class _Allocator> 3766inline 3767typename basic_string<_CharT, _Traits, _Allocator>::size_type 3768basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const basic_string& __str, 3769 size_type __pos) const _NOEXCEPT 3770{ 3771 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3772 (data(), size(), __str.data(), __pos, __str.size()); 3773} 3774 3775template<class _CharT, class _Traits, class _Allocator> 3776template <class _Tp> 3777__enable_if_t 3778< 3779 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3780 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3781> 3782basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, 3783 size_type __pos) const _NOEXCEPT 3784{ 3785 __self_view __sv = __t; 3786 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3787 (data(), size(), __sv.data(), __pos, __sv.size()); 3788} 3789 3790template<class _CharT, class _Traits, class _Allocator> 3791inline 3792typename basic_string<_CharT, _Traits, _Allocator>::size_type 3793basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3794 size_type __pos) const _NOEXCEPT 3795{ 3796 _LIBCPP_ASSERT(__s != nullptr, "string::find_last_not_of(): received nullptr"); 3797 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3798 (data(), size(), __s, __pos, traits_type::length(__s)); 3799} 3800 3801template<class _CharT, class _Traits, class _Allocator> 3802inline 3803typename basic_string<_CharT, _Traits, _Allocator>::size_type 3804basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(value_type __c, 3805 size_type __pos) const _NOEXCEPT 3806{ 3807 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3808 (data(), size(), __c, __pos); 3809} 3810 3811// compare 3812 3813template <class _CharT, class _Traits, class _Allocator> 3814template <class _Tp> 3815__enable_if_t 3816< 3817 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3818 int 3819> 3820basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const _NOEXCEPT 3821{ 3822 __self_view __sv = __t; 3823 size_t __lhs_sz = size(); 3824 size_t __rhs_sz = __sv.size(); 3825 int __result = traits_type::compare(data(), __sv.data(), 3826 _VSTD::min(__lhs_sz, __rhs_sz)); 3827 if (__result != 0) 3828 return __result; 3829 if (__lhs_sz < __rhs_sz) 3830 return -1; 3831 if (__lhs_sz > __rhs_sz) 3832 return 1; 3833 return 0; 3834} 3835 3836template <class _CharT, class _Traits, class _Allocator> 3837inline 3838int 3839basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT 3840{ 3841 return compare(__self_view(__str)); 3842} 3843 3844template <class _CharT, class _Traits, class _Allocator> 3845int 3846basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3847 size_type __n1, 3848 const value_type* __s, 3849 size_type __n2) const 3850{ 3851 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); 3852 size_type __sz = size(); 3853 if (__pos1 > __sz || __n2 == npos) 3854 __throw_out_of_range(); 3855 size_type __rlen = _VSTD::min(__n1, __sz - __pos1); 3856 int __r = traits_type::compare(data() + __pos1, __s, _VSTD::min(__rlen, __n2)); 3857 if (__r == 0) 3858 { 3859 if (__rlen < __n2) 3860 __r = -1; 3861 else if (__rlen > __n2) 3862 __r = 1; 3863 } 3864 return __r; 3865} 3866 3867template <class _CharT, class _Traits, class _Allocator> 3868template <class _Tp> 3869__enable_if_t 3870< 3871 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3872 int 3873> 3874basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3875 size_type __n1, 3876 const _Tp& __t) const 3877{ 3878 __self_view __sv = __t; 3879 return compare(__pos1, __n1, __sv.data(), __sv.size()); 3880} 3881 3882template <class _CharT, class _Traits, class _Allocator> 3883inline 3884int 3885basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3886 size_type __n1, 3887 const basic_string& __str) const 3888{ 3889 return compare(__pos1, __n1, __str.data(), __str.size()); 3890} 3891 3892template <class _CharT, class _Traits, class _Allocator> 3893template <class _Tp> 3894__enable_if_t 3895< 3896 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 3897 && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3898 int 3899> 3900basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3901 size_type __n1, 3902 const _Tp& __t, 3903 size_type __pos2, 3904 size_type __n2) const 3905{ 3906 __self_view __sv = __t; 3907 return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 3908} 3909 3910template <class _CharT, class _Traits, class _Allocator> 3911int 3912basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3913 size_type __n1, 3914 const basic_string& __str, 3915 size_type __pos2, 3916 size_type __n2) const 3917{ 3918 return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); 3919} 3920 3921template <class _CharT, class _Traits, class _Allocator> 3922int 3923basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT 3924{ 3925 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3926 return compare(0, npos, __s, traits_type::length(__s)); 3927} 3928 3929template <class _CharT, class _Traits, class _Allocator> 3930int 3931basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3932 size_type __n1, 3933 const value_type* __s) const 3934{ 3935 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3936 return compare(__pos1, __n1, __s, traits_type::length(__s)); 3937} 3938 3939// __invariants 3940 3941template<class _CharT, class _Traits, class _Allocator> 3942inline 3943bool 3944basic_string<_CharT, _Traits, _Allocator>::__invariants() const 3945{ 3946 if (size() > capacity()) 3947 return false; 3948 if (capacity() < __min_cap - 1) 3949 return false; 3950 if (data() == nullptr) 3951 return false; 3952 if (data()[size()] != value_type()) 3953 return false; 3954 return true; 3955} 3956 3957// __clear_and_shrink 3958 3959template<class _CharT, class _Traits, class _Allocator> 3960inline 3961void 3962basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT 3963{ 3964 clear(); 3965 if(__is_long()) 3966 { 3967 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1); 3968 __set_long_cap(0); 3969 __set_short_size(0); 3970 traits_type::assign(*__get_short_pointer(), value_type()); 3971 } 3972} 3973 3974// operator== 3975 3976template<class _CharT, class _Traits, class _Allocator> 3977inline _LIBCPP_INLINE_VISIBILITY 3978bool 3979operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3980 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3981{ 3982 size_t __lhs_sz = __lhs.size(); 3983 return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), 3984 __rhs.data(), 3985 __lhs_sz) == 0; 3986} 3987 3988template<class _Allocator> 3989inline _LIBCPP_INLINE_VISIBILITY 3990bool 3991operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, 3992 const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT 3993{ 3994 size_t __lhs_sz = __lhs.size(); 3995 if (__lhs_sz != __rhs.size()) 3996 return false; 3997 const char* __lp = __lhs.data(); 3998 const char* __rp = __rhs.data(); 3999 if (__lhs.__is_long()) 4000 return char_traits<char>::compare(__lp, __rp, __lhs_sz) == 0; 4001 for (; __lhs_sz != 0; --__lhs_sz, ++__lp, ++__rp) 4002 if (*__lp != *__rp) 4003 return false; 4004 return true; 4005} 4006 4007template<class _CharT, class _Traits, class _Allocator> 4008inline _LIBCPP_INLINE_VISIBILITY 4009bool 4010operator==(const _CharT* __lhs, 4011 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4012{ 4013 typedef basic_string<_CharT, _Traits, _Allocator> _String; 4014 _LIBCPP_ASSERT(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); 4015 size_t __lhs_len = _Traits::length(__lhs); 4016 if (__lhs_len != __rhs.size()) return false; 4017 return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; 4018} 4019 4020template<class _CharT, class _Traits, class _Allocator> 4021inline _LIBCPP_INLINE_VISIBILITY 4022bool 4023operator==(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 4024 const _CharT* __rhs) _NOEXCEPT 4025{ 4026 typedef basic_string<_CharT, _Traits, _Allocator> _String; 4027 _LIBCPP_ASSERT(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); 4028 size_t __rhs_len = _Traits::length(__rhs); 4029 if (__rhs_len != __lhs.size()) return false; 4030 return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; 4031} 4032 4033template<class _CharT, class _Traits, class _Allocator> 4034inline _LIBCPP_INLINE_VISIBILITY 4035bool 4036operator!=(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 4037 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4038{ 4039 return !(__lhs == __rhs); 4040} 4041 4042template<class _CharT, class _Traits, class _Allocator> 4043inline _LIBCPP_INLINE_VISIBILITY 4044bool 4045operator!=(const _CharT* __lhs, 4046 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4047{ 4048 return !(__lhs == __rhs); 4049} 4050 4051template<class _CharT, class _Traits, class _Allocator> 4052inline _LIBCPP_INLINE_VISIBILITY 4053bool 4054operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4055 const _CharT* __rhs) _NOEXCEPT 4056{ 4057 return !(__lhs == __rhs); 4058} 4059 4060// operator< 4061 4062template<class _CharT, class _Traits, class _Allocator> 4063inline _LIBCPP_INLINE_VISIBILITY 4064bool 4065operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4066 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4067{ 4068 return __lhs.compare(__rhs) < 0; 4069} 4070 4071template<class _CharT, class _Traits, class _Allocator> 4072inline _LIBCPP_INLINE_VISIBILITY 4073bool 4074operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4075 const _CharT* __rhs) _NOEXCEPT 4076{ 4077 return __lhs.compare(__rhs) < 0; 4078} 4079 4080template<class _CharT, class _Traits, class _Allocator> 4081inline _LIBCPP_INLINE_VISIBILITY 4082bool 4083operator< (const _CharT* __lhs, 4084 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4085{ 4086 return __rhs.compare(__lhs) > 0; 4087} 4088 4089// operator> 4090 4091template<class _CharT, class _Traits, class _Allocator> 4092inline _LIBCPP_INLINE_VISIBILITY 4093bool 4094operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4095 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4096{ 4097 return __rhs < __lhs; 4098} 4099 4100template<class _CharT, class _Traits, class _Allocator> 4101inline _LIBCPP_INLINE_VISIBILITY 4102bool 4103operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4104 const _CharT* __rhs) _NOEXCEPT 4105{ 4106 return __rhs < __lhs; 4107} 4108 4109template<class _CharT, class _Traits, class _Allocator> 4110inline _LIBCPP_INLINE_VISIBILITY 4111bool 4112operator> (const _CharT* __lhs, 4113 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4114{ 4115 return __rhs < __lhs; 4116} 4117 4118// operator<= 4119 4120template<class _CharT, class _Traits, class _Allocator> 4121inline _LIBCPP_INLINE_VISIBILITY 4122bool 4123operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4124 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4125{ 4126 return !(__rhs < __lhs); 4127} 4128 4129template<class _CharT, class _Traits, class _Allocator> 4130inline _LIBCPP_INLINE_VISIBILITY 4131bool 4132operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4133 const _CharT* __rhs) _NOEXCEPT 4134{ 4135 return !(__rhs < __lhs); 4136} 4137 4138template<class _CharT, class _Traits, class _Allocator> 4139inline _LIBCPP_INLINE_VISIBILITY 4140bool 4141operator<=(const _CharT* __lhs, 4142 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4143{ 4144 return !(__rhs < __lhs); 4145} 4146 4147// operator>= 4148 4149template<class _CharT, class _Traits, class _Allocator> 4150inline _LIBCPP_INLINE_VISIBILITY 4151bool 4152operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4153 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4154{ 4155 return !(__lhs < __rhs); 4156} 4157 4158template<class _CharT, class _Traits, class _Allocator> 4159inline _LIBCPP_INLINE_VISIBILITY 4160bool 4161operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4162 const _CharT* __rhs) _NOEXCEPT 4163{ 4164 return !(__lhs < __rhs); 4165} 4166 4167template<class _CharT, class _Traits, class _Allocator> 4168inline _LIBCPP_INLINE_VISIBILITY 4169bool 4170operator>=(const _CharT* __lhs, 4171 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4172{ 4173 return !(__lhs < __rhs); 4174} 4175 4176// operator + 4177 4178template<class _CharT, class _Traits, class _Allocator> 4179basic_string<_CharT, _Traits, _Allocator> 4180operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4181 const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4182{ 4183 basic_string<_CharT, _Traits, _Allocator> __r(__lhs.get_allocator()); 4184 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = __lhs.size(); 4185 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = __rhs.size(); 4186 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + __rhs_sz); 4187 __r.append(__rhs.data(), __rhs_sz); 4188 return __r; 4189} 4190 4191template<class _CharT, class _Traits, class _Allocator> 4192basic_string<_CharT, _Traits, _Allocator> 4193operator+(const _CharT* __lhs , const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4194{ 4195 basic_string<_CharT, _Traits, _Allocator> __r(__rhs.get_allocator()); 4196 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = _Traits::length(__lhs); 4197 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = __rhs.size(); 4198 __r.__init(__lhs, __lhs_sz, __lhs_sz + __rhs_sz); 4199 __r.append(__rhs.data(), __rhs_sz); 4200 return __r; 4201} 4202 4203template<class _CharT, class _Traits, class _Allocator> 4204basic_string<_CharT, _Traits, _Allocator> 4205operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4206{ 4207 basic_string<_CharT, _Traits, _Allocator> __r(__rhs.get_allocator()); 4208 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = __rhs.size(); 4209 __r.__init(&__lhs, 1, 1 + __rhs_sz); 4210 __r.append(__rhs.data(), __rhs_sz); 4211 return __r; 4212} 4213 4214template<class _CharT, class _Traits, class _Allocator> 4215inline 4216basic_string<_CharT, _Traits, _Allocator> 4217operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) 4218{ 4219 basic_string<_CharT, _Traits, _Allocator> __r(__lhs.get_allocator()); 4220 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = __lhs.size(); 4221 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = _Traits::length(__rhs); 4222 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + __rhs_sz); 4223 __r.append(__rhs, __rhs_sz); 4224 return __r; 4225} 4226 4227template<class _CharT, class _Traits, class _Allocator> 4228basic_string<_CharT, _Traits, _Allocator> 4229operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) 4230{ 4231 basic_string<_CharT, _Traits, _Allocator> __r(__lhs.get_allocator()); 4232 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = __lhs.size(); 4233 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + 1); 4234 __r.push_back(__rhs); 4235 return __r; 4236} 4237 4238#ifndef _LIBCPP_CXX03_LANG 4239 4240template<class _CharT, class _Traits, class _Allocator> 4241inline _LIBCPP_INLINE_VISIBILITY 4242basic_string<_CharT, _Traits, _Allocator> 4243operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4244{ 4245 return _VSTD::move(__lhs.append(__rhs)); 4246} 4247 4248template<class _CharT, class _Traits, class _Allocator> 4249inline _LIBCPP_INLINE_VISIBILITY 4250basic_string<_CharT, _Traits, _Allocator> 4251operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4252{ 4253 return _VSTD::move(__rhs.insert(0, __lhs)); 4254} 4255 4256template<class _CharT, class _Traits, class _Allocator> 4257inline _LIBCPP_INLINE_VISIBILITY 4258basic_string<_CharT, _Traits, _Allocator> 4259operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4260{ 4261 return _VSTD::move(__lhs.append(__rhs)); 4262} 4263 4264template<class _CharT, class _Traits, class _Allocator> 4265inline _LIBCPP_INLINE_VISIBILITY 4266basic_string<_CharT, _Traits, _Allocator> 4267operator+(const _CharT* __lhs , basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4268{ 4269 return _VSTD::move(__rhs.insert(0, __lhs)); 4270} 4271 4272template<class _CharT, class _Traits, class _Allocator> 4273inline _LIBCPP_INLINE_VISIBILITY 4274basic_string<_CharT, _Traits, _Allocator> 4275operator+(_CharT __lhs, basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4276{ 4277 __rhs.insert(__rhs.begin(), __lhs); 4278 return _VSTD::move(__rhs); 4279} 4280 4281template<class _CharT, class _Traits, class _Allocator> 4282inline _LIBCPP_INLINE_VISIBILITY 4283basic_string<_CharT, _Traits, _Allocator> 4284operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) 4285{ 4286 return _VSTD::move(__lhs.append(__rhs)); 4287} 4288 4289template<class _CharT, class _Traits, class _Allocator> 4290inline _LIBCPP_INLINE_VISIBILITY 4291basic_string<_CharT, _Traits, _Allocator> 4292operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) 4293{ 4294 __lhs.push_back(__rhs); 4295 return _VSTD::move(__lhs); 4296} 4297 4298#endif // _LIBCPP_CXX03_LANG 4299 4300// swap 4301 4302template<class _CharT, class _Traits, class _Allocator> 4303inline _LIBCPP_INLINE_VISIBILITY 4304void 4305swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, 4306 basic_string<_CharT, _Traits, _Allocator>& __rhs) 4307 _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) 4308{ 4309 __lhs.swap(__rhs); 4310} 4311 4312_LIBCPP_FUNC_VIS int stoi (const string& __str, size_t* __idx = nullptr, int __base = 10); 4313_LIBCPP_FUNC_VIS long stol (const string& __str, size_t* __idx = nullptr, int __base = 10); 4314_LIBCPP_FUNC_VIS unsigned long stoul (const string& __str, size_t* __idx = nullptr, int __base = 10); 4315_LIBCPP_FUNC_VIS long long stoll (const string& __str, size_t* __idx = nullptr, int __base = 10); 4316_LIBCPP_FUNC_VIS unsigned long long stoull(const string& __str, size_t* __idx = nullptr, int __base = 10); 4317 4318_LIBCPP_FUNC_VIS float stof (const string& __str, size_t* __idx = nullptr); 4319_LIBCPP_FUNC_VIS double stod (const string& __str, size_t* __idx = nullptr); 4320_LIBCPP_FUNC_VIS long double stold(const string& __str, size_t* __idx = nullptr); 4321 4322_LIBCPP_FUNC_VIS string to_string(int __val); 4323_LIBCPP_FUNC_VIS string to_string(unsigned __val); 4324_LIBCPP_FUNC_VIS string to_string(long __val); 4325_LIBCPP_FUNC_VIS string to_string(unsigned long __val); 4326_LIBCPP_FUNC_VIS string to_string(long long __val); 4327_LIBCPP_FUNC_VIS string to_string(unsigned long long __val); 4328_LIBCPP_FUNC_VIS string to_string(float __val); 4329_LIBCPP_FUNC_VIS string to_string(double __val); 4330_LIBCPP_FUNC_VIS string to_string(long double __val); 4331 4332#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4333_LIBCPP_FUNC_VIS int stoi (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4334_LIBCPP_FUNC_VIS long stol (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4335_LIBCPP_FUNC_VIS unsigned long stoul (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4336_LIBCPP_FUNC_VIS long long stoll (const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4337_LIBCPP_FUNC_VIS unsigned long long stoull(const wstring& __str, size_t* __idx = nullptr, int __base = 10); 4338 4339_LIBCPP_FUNC_VIS float stof (const wstring& __str, size_t* __idx = nullptr); 4340_LIBCPP_FUNC_VIS double stod (const wstring& __str, size_t* __idx = nullptr); 4341_LIBCPP_FUNC_VIS long double stold(const wstring& __str, size_t* __idx = nullptr); 4342 4343_LIBCPP_FUNC_VIS wstring to_wstring(int __val); 4344_LIBCPP_FUNC_VIS wstring to_wstring(unsigned __val); 4345_LIBCPP_FUNC_VIS wstring to_wstring(long __val); 4346_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long __val); 4347_LIBCPP_FUNC_VIS wstring to_wstring(long long __val); 4348_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long long __val); 4349_LIBCPP_FUNC_VIS wstring to_wstring(float __val); 4350_LIBCPP_FUNC_VIS wstring to_wstring(double __val); 4351_LIBCPP_FUNC_VIS wstring to_wstring(long double __val); 4352#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS 4353 4354template<class _CharT, class _Traits, class _Allocator> 4355_LIBCPP_TEMPLATE_DATA_VIS 4356const typename basic_string<_CharT, _Traits, _Allocator>::size_type 4357 basic_string<_CharT, _Traits, _Allocator>::npos; 4358 4359template <class _CharT, class _Allocator> 4360struct _LIBCPP_TEMPLATE_VIS 4361 hash<basic_string<_CharT, char_traits<_CharT>, _Allocator> > 4362 : public unary_function< 4363 basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> 4364{ 4365 size_t 4366 operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT 4367 { return __do_string_hash(__val.data(), __val.data() + __val.size()); } 4368}; 4369 4370 4371template<class _CharT, class _Traits, class _Allocator> 4372basic_ostream<_CharT, _Traits>& 4373operator<<(basic_ostream<_CharT, _Traits>& __os, 4374 const basic_string<_CharT, _Traits, _Allocator>& __str); 4375 4376template<class _CharT, class _Traits, class _Allocator> 4377basic_istream<_CharT, _Traits>& 4378operator>>(basic_istream<_CharT, _Traits>& __is, 4379 basic_string<_CharT, _Traits, _Allocator>& __str); 4380 4381template<class _CharT, class _Traits, class _Allocator> 4382basic_istream<_CharT, _Traits>& 4383getline(basic_istream<_CharT, _Traits>& __is, 4384 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4385 4386template<class _CharT, class _Traits, class _Allocator> 4387inline _LIBCPP_INLINE_VISIBILITY 4388basic_istream<_CharT, _Traits>& 4389getline(basic_istream<_CharT, _Traits>& __is, 4390 basic_string<_CharT, _Traits, _Allocator>& __str); 4391 4392template<class _CharT, class _Traits, class _Allocator> 4393inline _LIBCPP_INLINE_VISIBILITY 4394basic_istream<_CharT, _Traits>& 4395getline(basic_istream<_CharT, _Traits>&& __is, 4396 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4397 4398template<class _CharT, class _Traits, class _Allocator> 4399inline _LIBCPP_INLINE_VISIBILITY 4400basic_istream<_CharT, _Traits>& 4401getline(basic_istream<_CharT, _Traits>&& __is, 4402 basic_string<_CharT, _Traits, _Allocator>& __str); 4403 4404#if _LIBCPP_STD_VER > 17 4405template <class _CharT, class _Traits, class _Allocator, class _Up> 4406inline _LIBCPP_INLINE_VISIBILITY 4407 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4408 erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { 4409 auto __old_size = __str.size(); 4410 __str.erase(_VSTD::remove(__str.begin(), __str.end(), __v), __str.end()); 4411 return __old_size - __str.size(); 4412} 4413 4414template <class _CharT, class _Traits, class _Allocator, class _Predicate> 4415inline _LIBCPP_INLINE_VISIBILITY 4416 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4417 erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, 4418 _Predicate __pred) { 4419 auto __old_size = __str.size(); 4420 __str.erase(_VSTD::remove_if(__str.begin(), __str.end(), __pred), 4421 __str.end()); 4422 return __old_size - __str.size(); 4423} 4424#endif 4425 4426#if _LIBCPP_DEBUG_LEVEL == 2 4427 4428template<class _CharT, class _Traits, class _Allocator> 4429bool 4430basic_string<_CharT, _Traits, _Allocator>::__dereferenceable(const const_iterator* __i) const 4431{ 4432 return data() <= _VSTD::__to_address(__i->base()) && 4433 _VSTD::__to_address(__i->base()) < data() + size(); 4434} 4435 4436template<class _CharT, class _Traits, class _Allocator> 4437bool 4438basic_string<_CharT, _Traits, _Allocator>::__decrementable(const const_iterator* __i) const 4439{ 4440 return data() < _VSTD::__to_address(__i->base()) && 4441 _VSTD::__to_address(__i->base()) <= data() + size(); 4442} 4443 4444template<class _CharT, class _Traits, class _Allocator> 4445bool 4446basic_string<_CharT, _Traits, _Allocator>::__addable(const const_iterator* __i, ptrdiff_t __n) const 4447{ 4448 const value_type* __p = _VSTD::__to_address(__i->base()) + __n; 4449 return data() <= __p && __p <= data() + size(); 4450} 4451 4452template<class _CharT, class _Traits, class _Allocator> 4453bool 4454basic_string<_CharT, _Traits, _Allocator>::__subscriptable(const const_iterator* __i, ptrdiff_t __n) const 4455{ 4456 const value_type* __p = _VSTD::__to_address(__i->base()) + __n; 4457 return data() <= __p && __p < data() + size(); 4458} 4459 4460#endif // _LIBCPP_DEBUG_LEVEL == 2 4461 4462#if _LIBCPP_STD_VER > 11 4463// Literal suffixes for basic_string [basic.string.literals] 4464inline namespace literals 4465{ 4466 inline namespace string_literals 4467 { 4468 inline _LIBCPP_INLINE_VISIBILITY 4469 basic_string<char> operator "" s( const char *__str, size_t __len ) 4470 { 4471 return basic_string<char> (__str, __len); 4472 } 4473 4474#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 4475 inline _LIBCPP_INLINE_VISIBILITY 4476 basic_string<wchar_t> operator "" s( const wchar_t *__str, size_t __len ) 4477 { 4478 return basic_string<wchar_t> (__str, __len); 4479 } 4480#endif 4481 4482#ifndef _LIBCPP_HAS_NO_CHAR8_T 4483 inline _LIBCPP_INLINE_VISIBILITY 4484 basic_string<char8_t> operator "" s(const char8_t *__str, size_t __len) _NOEXCEPT 4485 { 4486 return basic_string<char8_t> (__str, __len); 4487 } 4488#endif 4489 4490 inline _LIBCPP_INLINE_VISIBILITY 4491 basic_string<char16_t> operator "" s( const char16_t *__str, size_t __len ) 4492 { 4493 return basic_string<char16_t> (__str, __len); 4494 } 4495 4496 inline _LIBCPP_INLINE_VISIBILITY 4497 basic_string<char32_t> operator "" s( const char32_t *__str, size_t __len ) 4498 { 4499 return basic_string<char32_t> (__str, __len); 4500 } 4501 } // namespace string_literals 4502} // namespace literals 4503#endif 4504 4505_LIBCPP_END_NAMESPACE_STD 4506 4507_LIBCPP_POP_MACROS 4508 4509#endif // _LIBCPP_STRING 4510