1// -*- C++ -*- 2//===--------------------------- string -----------------------------------===// 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>; 72 73template<class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> > 74class basic_string 75{ 76public: 77// types: 78 typedef traits traits_type; 79 typedef typename traits_type::char_type value_type; 80 typedef Allocator allocator_type; 81 typedef typename allocator_type::size_type size_type; 82 typedef typename allocator_type::difference_type difference_type; 83 typedef typename allocator_type::reference reference; 84 typedef typename allocator_type::const_reference const_reference; 85 typedef typename allocator_type::pointer pointer; 86 typedef typename allocator_type::const_pointer const_pointer; 87 typedef implementation-defined iterator; 88 typedef implementation-defined const_iterator; 89 typedef std::reverse_iterator<iterator> reverse_iterator; 90 typedef std::reverse_iterator<const_iterator> const_reverse_iterator; 91 92 static const size_type npos = -1; 93 94 basic_string() 95 noexcept(is_nothrow_default_constructible<allocator_type>::value); 96 explicit basic_string(const allocator_type& a); 97 basic_string(const basic_string& str); 98 basic_string(basic_string&& str) 99 noexcept(is_nothrow_move_constructible<allocator_type>::value); 100 basic_string(const basic_string& str, size_type pos, 101 const allocator_type& a = allocator_type()); 102 basic_string(const basic_string& str, size_type pos, size_type n, 103 const Allocator& a = Allocator()); 104 template<class T> 105 basic_string(const T& t, size_type pos, size_type n, const Allocator& a = Allocator()); // C++17 106 template <class T> 107 explicit basic_string(const T& t, const Allocator& a = Allocator()); // C++17 108 basic_string(const value_type* s, const allocator_type& a = allocator_type()); 109 basic_string(const value_type* s, size_type n, const allocator_type& a = allocator_type()); 110 basic_string(size_type n, value_type c, const allocator_type& a = allocator_type()); 111 template<class InputIterator> 112 basic_string(InputIterator begin, InputIterator end, 113 const allocator_type& a = allocator_type()); 114 basic_string(initializer_list<value_type>, const Allocator& = Allocator()); 115 basic_string(const basic_string&, const Allocator&); 116 basic_string(basic_string&&, const Allocator&); 117 118 ~basic_string(); 119 120 operator basic_string_view<charT, traits>() const noexcept; 121 122 basic_string& operator=(const basic_string& str); 123 template <class T> 124 basic_string& operator=(const T& t); // C++17 125 basic_string& operator=(basic_string&& str) 126 noexcept( 127 allocator_type::propagate_on_container_move_assignment::value || 128 allocator_type::is_always_equal::value ); // C++17 129 basic_string& operator=(const value_type* s); 130 basic_string& operator=(value_type c); 131 basic_string& operator=(initializer_list<value_type>); 132 133 iterator begin() noexcept; 134 const_iterator begin() const noexcept; 135 iterator end() noexcept; 136 const_iterator end() const noexcept; 137 138 reverse_iterator rbegin() noexcept; 139 const_reverse_iterator rbegin() const noexcept; 140 reverse_iterator rend() noexcept; 141 const_reverse_iterator rend() const noexcept; 142 143 const_iterator cbegin() const noexcept; 144 const_iterator cend() const noexcept; 145 const_reverse_iterator crbegin() const noexcept; 146 const_reverse_iterator crend() const noexcept; 147 148 size_type size() const noexcept; 149 size_type length() const noexcept; 150 size_type max_size() const noexcept; 151 size_type capacity() const noexcept; 152 153 void resize(size_type n, value_type c); 154 void resize(size_type n); 155 156 void reserve(size_type res_arg = 0); 157 void shrink_to_fit(); 158 void clear() noexcept; 159 bool empty() const noexcept; 160 161 const_reference operator[](size_type pos) const; 162 reference operator[](size_type pos); 163 164 const_reference at(size_type n) const; 165 reference at(size_type n); 166 167 basic_string& operator+=(const basic_string& str); 168 template <class T> 169 basic_string& operator+=(const T& t); // C++17 170 basic_string& operator+=(const value_type* s); 171 basic_string& operator+=(value_type c); 172 basic_string& operator+=(initializer_list<value_type>); 173 174 basic_string& append(const basic_string& str); 175 template <class T> 176 basic_string& append(const T& t); // C++17 177 basic_string& append(const basic_string& str, size_type pos, size_type n=npos); //C++14 178 template <class T> 179 basic_string& append(const T& t, size_type pos, size_type n=npos); // C++17 180 basic_string& append(const value_type* s, size_type n); 181 basic_string& append(const value_type* s); 182 basic_string& append(size_type n, value_type c); 183 template<class InputIterator> 184 basic_string& append(InputIterator first, InputIterator last); 185 basic_string& append(initializer_list<value_type>); 186 187 void push_back(value_type c); 188 void pop_back(); 189 reference front(); 190 const_reference front() const; 191 reference back(); 192 const_reference back() const; 193 194 basic_string& assign(const basic_string& str); 195 template <class T> 196 basic_string& assign(const T& t); // C++17 197 basic_string& assign(basic_string&& str); 198 basic_string& assign(const basic_string& str, size_type pos, size_type n=npos); // C++14 199 template <class T> 200 basic_string& assign(const T& t, size_type pos, size_type n=npos); // C++17 201 basic_string& assign(const value_type* s, size_type n); 202 basic_string& assign(const value_type* s); 203 basic_string& assign(size_type n, value_type c); 204 template<class InputIterator> 205 basic_string& assign(InputIterator first, InputIterator last); 206 basic_string& assign(initializer_list<value_type>); 207 208 basic_string& insert(size_type pos1, const basic_string& str); 209 template <class T> 210 basic_string& insert(size_type pos1, const T& t); 211 basic_string& insert(size_type pos1, const basic_string& str, 212 size_type pos2, size_type n); 213 template <class T> 214 basic_string& insert(size_type pos1, const T& t, size_type pos2, size_type n); // C++17 215 basic_string& insert(size_type pos, const value_type* s, size_type n=npos); //C++14 216 basic_string& insert(size_type pos, const value_type* s); 217 basic_string& insert(size_type pos, size_type n, value_type c); 218 iterator insert(const_iterator p, value_type c); 219 iterator insert(const_iterator p, size_type n, value_type c); 220 template<class InputIterator> 221 iterator insert(const_iterator p, InputIterator first, InputIterator last); 222 iterator insert(const_iterator p, initializer_list<value_type>); 223 224 basic_string& erase(size_type pos = 0, size_type n = npos); 225 iterator erase(const_iterator position); 226 iterator erase(const_iterator first, const_iterator last); 227 228 basic_string& replace(size_type pos1, size_type n1, const basic_string& str); 229 template <class T> 230 basic_string& replace(size_type pos1, size_type n1, const T& t); // C++17 231 basic_string& replace(size_type pos1, size_type n1, const basic_string& str, 232 size_type pos2, size_type n2=npos); // C++14 233 template <class T> 234 basic_string& replace(size_type pos1, size_type n1, const T& t, 235 size_type pos2, size_type n); // C++17 236 basic_string& replace(size_type pos, size_type n1, const value_type* s, size_type n2); 237 basic_string& replace(size_type pos, size_type n1, const value_type* s); 238 basic_string& replace(size_type pos, size_type n1, size_type n2, value_type c); 239 basic_string& replace(const_iterator i1, const_iterator i2, const basic_string& str); 240 template <class T> 241 basic_string& replace(const_iterator i1, const_iterator i2, const T& t); // C++17 242 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s, size_type n); 243 basic_string& replace(const_iterator i1, const_iterator i2, const value_type* s); 244 basic_string& replace(const_iterator i1, const_iterator i2, size_type n, value_type c); 245 template<class InputIterator> 246 basic_string& replace(const_iterator i1, const_iterator i2, InputIterator j1, InputIterator j2); 247 basic_string& replace(const_iterator i1, const_iterator i2, initializer_list<value_type>); 248 249 size_type copy(value_type* s, size_type n, size_type pos = 0) const; 250 basic_string substr(size_type pos = 0, size_type n = npos) const; 251 252 void swap(basic_string& str) 253 noexcept(allocator_traits<allocator_type>::propagate_on_container_swap::value || 254 allocator_traits<allocator_type>::is_always_equal::value); // C++17 255 256 const value_type* c_str() const noexcept; 257 const value_type* data() const noexcept; 258 value_type* data() noexcept; // C++17 259 260 allocator_type get_allocator() const noexcept; 261 262 size_type find(const basic_string& str, size_type pos = 0) const noexcept; 263 template <class T> 264 size_type find(const T& t, size_type pos = 0) const; // C++17 265 size_type find(const value_type* s, size_type pos, size_type n) const noexcept; 266 size_type find(const value_type* s, size_type pos = 0) const noexcept; 267 size_type find(value_type c, size_type pos = 0) const noexcept; 268 269 size_type rfind(const basic_string& str, size_type pos = npos) const noexcept; 270 template <class T> 271 size_type rfind(const T& t, size_type pos = npos) const; // C++17 272 size_type rfind(const value_type* s, size_type pos, size_type n) const noexcept; 273 size_type rfind(const value_type* s, size_type pos = npos) const noexcept; 274 size_type rfind(value_type c, size_type pos = npos) const noexcept; 275 276 size_type find_first_of(const basic_string& str, size_type pos = 0) const noexcept; 277 template <class T> 278 size_type find_first_of(const T& t, size_type pos = 0) const; // C++17 279 size_type find_first_of(const value_type* s, size_type pos, size_type n) const noexcept; 280 size_type find_first_of(const value_type* s, size_type pos = 0) const noexcept; 281 size_type find_first_of(value_type c, size_type pos = 0) const noexcept; 282 283 size_type find_last_of(const basic_string& str, size_type pos = npos) const noexcept; 284 template <class T> 285 size_type find_last_of(const T& t, size_type pos = npos) const noexcept; // C++17 286 size_type find_last_of(const value_type* s, size_type pos, size_type n) const noexcept; 287 size_type find_last_of(const value_type* s, size_type pos = npos) const noexcept; 288 size_type find_last_of(value_type c, size_type pos = npos) const noexcept; 289 290 size_type find_first_not_of(const basic_string& str, size_type pos = 0) const noexcept; 291 template <class T> 292 size_type find_first_not_of(const T& t, size_type pos = 0) const; // C++17 293 size_type find_first_not_of(const value_type* s, size_type pos, size_type n) const noexcept; 294 size_type find_first_not_of(const value_type* s, size_type pos = 0) const noexcept; 295 size_type find_first_not_of(value_type c, size_type pos = 0) const noexcept; 296 297 size_type find_last_not_of(const basic_string& str, size_type pos = npos) const noexcept; 298 template <class T> 299 size_type find_last_not_of(const T& t, size_type pos = npos) const; // C++17 300 size_type find_last_not_of(const value_type* s, size_type pos, size_type n) const noexcept; 301 size_type find_last_not_of(const value_type* s, size_type pos = npos) const noexcept; 302 size_type find_last_not_of(value_type c, size_type pos = npos) const noexcept; 303 304 int compare(const basic_string& str) const noexcept; 305 template <class T> 306 int compare(const T& t) const noexcept; // C++17 307 int compare(size_type pos1, size_type n1, const basic_string& str) const; 308 template <class T> 309 int compare(size_type pos1, size_type n1, const T& t) const; // C++17 310 int compare(size_type pos1, size_type n1, const basic_string& str, 311 size_type pos2, size_type n2=npos) const; // C++14 312 template <class T> 313 int compare(size_type pos1, size_type n1, const T& t, 314 size_type pos2, size_type n2=npos) const; // C++17 315 int compare(const value_type* s) const noexcept; 316 int compare(size_type pos1, size_type n1, const value_type* s) const; 317 int compare(size_type pos1, size_type n1, const value_type* s, size_type n2) const; 318 319 bool starts_with(basic_string_view<charT, traits> sv) const noexcept; // C++2a 320 bool starts_with(charT c) const noexcept; // C++2a 321 bool starts_with(const charT* s) const; // C++2a 322 bool ends_with(basic_string_view<charT, traits> sv) const noexcept; // C++2a 323 bool ends_with(charT c) const noexcept; // C++2a 324 bool ends_with(const charT* s) const; // C++2a 325 326 bool __invariants() const; 327}; 328 329template<class InputIterator, 330 class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 331basic_string(InputIterator, InputIterator, Allocator = Allocator()) 332 -> basic_string<typename iterator_traits<InputIterator>::value_type, 333 char_traits<typename iterator_traits<InputIterator>::value_type>, 334 Allocator>; // C++17 335 336template<class charT, class traits, class Allocator> 337basic_string<charT, traits, Allocator> 338operator+(const basic_string<charT, traits, Allocator>& lhs, 339 const basic_string<charT, traits, Allocator>& rhs); 340 341template<class charT, class traits, class Allocator> 342basic_string<charT, traits, Allocator> 343operator+(const charT* lhs , const basic_string<charT,traits,Allocator>&rhs); 344 345template<class charT, class traits, class Allocator> 346basic_string<charT, traits, Allocator> 347operator+(charT lhs, const basic_string<charT,traits,Allocator>& rhs); 348 349template<class charT, class traits, class Allocator> 350basic_string<charT, traits, Allocator> 351operator+(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs); 352 353template<class charT, class traits, class Allocator> 354basic_string<charT, traits, Allocator> 355operator+(const basic_string<charT, traits, Allocator>& lhs, charT rhs); 356 357template<class charT, class traits, class Allocator> 358bool operator==(const basic_string<charT, traits, Allocator>& lhs, 359 const basic_string<charT, traits, Allocator>& rhs) noexcept; 360 361template<class charT, class traits, class Allocator> 362bool operator==(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 363 364template<class charT, class traits, class Allocator> 365bool operator==(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs) noexcept; 366 367template<class charT, class traits, class Allocator> 368bool operator!=(const basic_string<charT,traits,Allocator>& lhs, 369 const basic_string<charT, traits, Allocator>& rhs) noexcept; 370 371template<class charT, class traits, class Allocator> 372bool operator!=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 373 374template<class charT, class traits, class Allocator> 375bool operator!=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 376 377template<class charT, class traits, class Allocator> 378bool operator< (const basic_string<charT, traits, Allocator>& lhs, 379 const basic_string<charT, traits, Allocator>& rhs) noexcept; 380 381template<class charT, class traits, class Allocator> 382bool operator< (const basic_string<charT, traits, Allocator>& lhs, const charT* 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, 389 const basic_string<charT, traits, Allocator>& rhs) noexcept; 390 391template<class charT, class traits, class Allocator> 392bool operator> (const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 393 394template<class charT, class traits, class Allocator> 395bool operator> (const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 396 397template<class charT, class traits, class Allocator> 398bool operator<=(const basic_string<charT, traits, Allocator>& lhs, 399 const basic_string<charT, traits, Allocator>& rhs) noexcept; 400 401template<class charT, class traits, class Allocator> 402bool operator<=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 403 404template<class charT, class traits, class Allocator> 405bool operator<=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 406 407template<class charT, class traits, class Allocator> 408bool operator>=(const basic_string<charT, traits, Allocator>& lhs, 409 const basic_string<charT, traits, Allocator>& rhs) noexcept; 410 411template<class charT, class traits, class Allocator> 412bool operator>=(const basic_string<charT, traits, Allocator>& lhs, const charT* rhs) noexcept; 413 414template<class charT, class traits, class Allocator> 415bool operator>=(const charT* lhs, const basic_string<charT, traits, Allocator>& rhs) noexcept; 416 417template<class charT, class traits, class Allocator> 418void swap(basic_string<charT, traits, Allocator>& lhs, 419 basic_string<charT, traits, Allocator>& rhs) 420 noexcept(noexcept(lhs.swap(rhs))); 421 422template<class charT, class traits, class Allocator> 423basic_istream<charT, traits>& 424operator>>(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 425 426template<class charT, class traits, class Allocator> 427basic_ostream<charT, traits>& 428operator<<(basic_ostream<charT, traits>& os, const basic_string<charT, traits, Allocator>& str); 429 430template<class charT, class traits, class Allocator> 431basic_istream<charT, traits>& 432getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str, 433 charT delim); 434 435template<class charT, class traits, class Allocator> 436basic_istream<charT, traits>& 437getline(basic_istream<charT, traits>& is, basic_string<charT, traits, Allocator>& str); 438 439template<class charT, class traits, class Allocator, class U> 440typename basic_string<charT, traits, Allocator>::size_type 441erase(basic_string<charT, traits, Allocator>& c, const U& value); // C++20 442template<class charT, class traits, class Allocator, class Predicate> 443typename basic_string<charT, traits, Allocator>::size_type 444erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred); // C++20 445 446typedef basic_string<char> string; 447typedef basic_string<wchar_t> wstring; 448typedef basic_string<char16_t> u16string; 449typedef basic_string<char32_t> u32string; 450 451int stoi (const string& str, size_t* idx = 0, int base = 10); 452long stol (const string& str, size_t* idx = 0, int base = 10); 453unsigned long stoul (const string& str, size_t* idx = 0, int base = 10); 454long long stoll (const string& str, size_t* idx = 0, int base = 10); 455unsigned long long stoull(const string& str, size_t* idx = 0, int base = 10); 456 457float stof (const string& str, size_t* idx = 0); 458double stod (const string& str, size_t* idx = 0); 459long double stold(const string& str, size_t* idx = 0); 460 461string to_string(int val); 462string to_string(unsigned val); 463string to_string(long val); 464string to_string(unsigned long val); 465string to_string(long long val); 466string to_string(unsigned long long val); 467string to_string(float val); 468string to_string(double val); 469string to_string(long double val); 470 471int stoi (const wstring& str, size_t* idx = 0, int base = 10); 472long stol (const wstring& str, size_t* idx = 0, int base = 10); 473unsigned long stoul (const wstring& str, size_t* idx = 0, int base = 10); 474long long stoll (const wstring& str, size_t* idx = 0, int base = 10); 475unsigned long long stoull(const wstring& str, size_t* idx = 0, int base = 10); 476 477float stof (const wstring& str, size_t* idx = 0); 478double stod (const wstring& str, size_t* idx = 0); 479long double stold(const wstring& str, size_t* idx = 0); 480 481wstring to_wstring(int val); 482wstring to_wstring(unsigned val); 483wstring to_wstring(long val); 484wstring to_wstring(unsigned long val); 485wstring to_wstring(long long val); 486wstring to_wstring(unsigned long long val); 487wstring to_wstring(float val); 488wstring to_wstring(double val); 489wstring to_wstring(long double val); 490 491template <> struct hash<string>; 492template <> struct hash<u16string>; 493template <> struct hash<u32string>; 494template <> struct hash<wstring>; 495 496basic_string<char> operator "" s( const char *str, size_t len ); // C++14 497basic_string<wchar_t> operator "" s( const wchar_t *str, size_t len ); // C++14 498basic_string<char16_t> operator "" s( const char16_t *str, size_t len ); // C++14 499basic_string<char32_t> operator "" s( const char32_t *str, size_t len ); // C++14 500 501} // std 502 503*/ 504 505#include <__config> 506#include <string_view> 507#include <iosfwd> 508#include <cstring> 509#include <cstdio> // For EOF. 510#include <cwchar> 511#include <algorithm> 512#include <iterator> 513#include <utility> 514#include <memory> 515#include <stdexcept> 516#include <type_traits> 517#include <initializer_list> 518#include <__functional_base> 519#include <version> 520#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 521#include <cstdint> 522#endif 523 524#include <__debug> 525 526#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 527#pragma GCC system_header 528#endif 529 530_LIBCPP_PUSH_MACROS 531#include <__undef_macros> 532 533 534_LIBCPP_BEGIN_NAMESPACE_STD 535 536// fpos 537 538template <class _StateT> 539class _LIBCPP_TEMPLATE_VIS fpos 540{ 541private: 542 _StateT __st_; 543 streamoff __off_; 544public: 545 _LIBCPP_INLINE_VISIBILITY fpos(streamoff __off = streamoff()) : __st_(), __off_(__off) {} 546 547 _LIBCPP_INLINE_VISIBILITY operator streamoff() const {return __off_;} 548 549 _LIBCPP_INLINE_VISIBILITY _StateT state() const {return __st_;} 550 _LIBCPP_INLINE_VISIBILITY void state(_StateT __st) {__st_ = __st;} 551 552 _LIBCPP_INLINE_VISIBILITY fpos& operator+=(streamoff __off) {__off_ += __off; return *this;} 553 _LIBCPP_INLINE_VISIBILITY fpos operator+ (streamoff __off) const {fpos __t(*this); __t += __off; return __t;} 554 _LIBCPP_INLINE_VISIBILITY fpos& operator-=(streamoff __off) {__off_ -= __off; return *this;} 555 _LIBCPP_INLINE_VISIBILITY fpos operator- (streamoff __off) const {fpos __t(*this); __t -= __off; return __t;} 556}; 557 558template <class _StateT> 559inline _LIBCPP_INLINE_VISIBILITY 560streamoff operator-(const fpos<_StateT>& __x, const fpos<_StateT>& __y) 561 {return streamoff(__x) - streamoff(__y);} 562 563template <class _StateT> 564inline _LIBCPP_INLINE_VISIBILITY 565bool operator==(const fpos<_StateT>& __x, const fpos<_StateT>& __y) 566 {return streamoff(__x) == streamoff(__y);} 567 568template <class _StateT> 569inline _LIBCPP_INLINE_VISIBILITY 570bool operator!=(const fpos<_StateT>& __x, const fpos<_StateT>& __y) 571 {return streamoff(__x) != streamoff(__y);} 572 573// basic_string 574 575template<class _CharT, class _Traits, class _Allocator> 576basic_string<_CharT, _Traits, _Allocator> 577operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, 578 const basic_string<_CharT, _Traits, _Allocator>& __y); 579 580template<class _CharT, class _Traits, class _Allocator> 581basic_string<_CharT, _Traits, _Allocator> 582operator+(const _CharT* __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 583 584template<class _CharT, class _Traits, class _Allocator> 585basic_string<_CharT, _Traits, _Allocator> 586operator+(_CharT __x, const basic_string<_CharT,_Traits,_Allocator>& __y); 587 588template<class _CharT, class _Traits, class _Allocator> 589inline _LIBCPP_INLINE_VISIBILITY 590basic_string<_CharT, _Traits, _Allocator> 591operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, const _CharT* __y); 592 593template<class _CharT, class _Traits, class _Allocator> 594basic_string<_CharT, _Traits, _Allocator> 595operator+(const basic_string<_CharT, _Traits, _Allocator>& __x, _CharT __y); 596 597_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS string operator+<char, char_traits<char>, allocator<char> >(char const*, string const&)) 598 599template <bool> 600class _LIBCPP_TEMPLATE_VIS __basic_string_common 601{ 602protected: 603 _LIBCPP_NORETURN void __throw_length_error() const; 604 _LIBCPP_NORETURN void __throw_out_of_range() const; 605}; 606 607template <bool __b> 608void 609__basic_string_common<__b>::__throw_length_error() const 610{ 611 _VSTD::__throw_length_error("basic_string"); 612} 613 614template <bool __b> 615void 616__basic_string_common<__b>::__throw_out_of_range() const 617{ 618 _VSTD::__throw_out_of_range("basic_string"); 619} 620 621_LIBCPP_EXTERN_TEMPLATE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __basic_string_common<true>) 622 623#ifdef _LIBCPP_NO_EXCEPTIONS 624template <class _Iter> 625struct __libcpp_string_gets_noexcept_iterator_impl : public true_type {}; 626#elif defined(_LIBCPP_HAS_NO_NOEXCEPT) 627template <class _Iter> 628struct __libcpp_string_gets_noexcept_iterator_impl : public false_type {}; 629#else 630template <class _Iter, bool = __is_cpp17_forward_iterator<_Iter>::value> 631struct __libcpp_string_gets_noexcept_iterator_impl : public _LIBCPP_BOOL_CONSTANT(( 632 noexcept(++(declval<_Iter&>())) && 633 is_nothrow_assignable<_Iter&, _Iter>::value && 634 noexcept(declval<_Iter>() == declval<_Iter>()) && 635 noexcept(*declval<_Iter>()) 636)) {}; 637 638template <class _Iter> 639struct __libcpp_string_gets_noexcept_iterator_impl<_Iter, false> : public false_type {}; 640#endif 641 642 643template <class _Iter> 644struct __libcpp_string_gets_noexcept_iterator 645 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value || __libcpp_string_gets_noexcept_iterator_impl<_Iter>::value) {}; 646 647template <class _CharT, class _Traits, class _Tp> 648struct __can_be_converted_to_string_view : public _BoolConstant< 649 is_convertible<const _Tp&, basic_string_view<_CharT, _Traits> >::value && 650 !is_convertible<const _Tp&, const _CharT*>::value 651 > {}; 652 653#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 654 655template <class _CharT, size_t = sizeof(_CharT)> 656struct __padding 657{ 658 unsigned char __xx[sizeof(_CharT)-1]; 659}; 660 661template <class _CharT> 662struct __padding<_CharT, 1> 663{ 664}; 665 666#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 667 668template<class _CharT, class _Traits, class _Allocator> 669class _LIBCPP_TEMPLATE_VIS basic_string 670 : private __basic_string_common<true> 671{ 672public: 673 typedef basic_string __self; 674 typedef basic_string_view<_CharT, _Traits> __self_view; 675 typedef _Traits traits_type; 676 typedef _CharT value_type; 677 typedef _Allocator allocator_type; 678 typedef allocator_traits<allocator_type> __alloc_traits; 679 typedef typename __alloc_traits::size_type size_type; 680 typedef typename __alloc_traits::difference_type difference_type; 681 typedef value_type& reference; 682 typedef const value_type& const_reference; 683 typedef typename __alloc_traits::pointer pointer; 684 typedef typename __alloc_traits::const_pointer const_pointer; 685 686 static_assert((!is_array<value_type>::value), "Character type of basic_string must not be an array"); 687 static_assert(( is_standard_layout<value_type>::value), "Character type of basic_string must be standard-layout"); 688 static_assert(( is_trivial<value_type>::value), "Character type of basic_string must be trivial"); 689 static_assert(( is_same<_CharT, typename traits_type::char_type>::value), 690 "traits_type::char_type must be the same type as CharT"); 691 static_assert(( is_same<typename allocator_type::value_type, value_type>::value), 692 "Allocator::value_type must be same type as value_type"); 693 694 typedef __wrap_iter<pointer> iterator; 695 typedef __wrap_iter<const_pointer> const_iterator; 696 typedef _VSTD::reverse_iterator<iterator> reverse_iterator; 697 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator; 698 699private: 700 701#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 702 703 struct __long 704 { 705 pointer __data_; 706 size_type __size_; 707 size_type __cap_; 708 }; 709 710#ifdef _LIBCPP_BIG_ENDIAN 711 static const size_type __short_mask = 0x01; 712 static const size_type __long_mask = 0x1ul; 713#else // _LIBCPP_BIG_ENDIAN 714 static const size_type __short_mask = 0x80; 715 static const size_type __long_mask = ~(size_type(~0) >> 1); 716#endif // _LIBCPP_BIG_ENDIAN 717 718 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 719 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 720 721 struct __short 722 { 723 value_type __data_[__min_cap]; 724 struct 725 : __padding<value_type> 726 { 727 unsigned char __size_; 728 }; 729 }; 730 731#else 732 733 struct __long 734 { 735 size_type __cap_; 736 size_type __size_; 737 pointer __data_; 738 }; 739 740#ifdef _LIBCPP_BIG_ENDIAN 741 static const size_type __short_mask = 0x80; 742 static const size_type __long_mask = ~(size_type(~0) >> 1); 743#else // _LIBCPP_BIG_ENDIAN 744 static const size_type __short_mask = 0x01; 745 static const size_type __long_mask = 0x1ul; 746#endif // _LIBCPP_BIG_ENDIAN 747 748 enum {__min_cap = (sizeof(__long) - 1)/sizeof(value_type) > 2 ? 749 (sizeof(__long) - 1)/sizeof(value_type) : 2}; 750 751 struct __short 752 { 753 union 754 { 755 unsigned char __size_; 756 value_type __lx; 757 }; 758 value_type __data_[__min_cap]; 759 }; 760 761#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 762 763 union __ulx{__long __lx; __short __lxx;}; 764 765 enum {__n_words = sizeof(__ulx) / sizeof(size_type)}; 766 767 struct __raw 768 { 769 size_type __words[__n_words]; 770 }; 771 772 struct __rep 773 { 774 union 775 { 776 __long __l; 777 __short __s; 778 __raw __r; 779 }; 780 }; 781 782 __compressed_pair<__rep, allocator_type> __r_; 783 784public: 785 _LIBCPP_FUNC_VIS 786 static const size_type npos = -1; 787 788 _LIBCPP_INLINE_VISIBILITY basic_string() 789 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value); 790 791 _LIBCPP_INLINE_VISIBILITY explicit basic_string(const allocator_type& __a) 792#if _LIBCPP_STD_VER <= 14 793 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value); 794#else 795 _NOEXCEPT; 796#endif 797 798 basic_string(const basic_string& __str); 799 basic_string(const basic_string& __str, const allocator_type& __a); 800 801#ifndef _LIBCPP_CXX03_LANG 802 _LIBCPP_INLINE_VISIBILITY 803 basic_string(basic_string&& __str) 804#if _LIBCPP_STD_VER <= 14 805 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value); 806#else 807 _NOEXCEPT; 808#endif 809 810 _LIBCPP_INLINE_VISIBILITY 811 basic_string(basic_string&& __str, const allocator_type& __a); 812#endif // _LIBCPP_CXX03_LANG 813 814 template <class = _EnableIf<__is_allocator<_Allocator>::value, nullptr_t> > 815 _LIBCPP_INLINE_VISIBILITY 816 basic_string(const _CharT* __s) : __r_(__default_init_tag(), __default_init_tag()) { 817 _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*) detected nullptr"); 818 __init(__s, traits_type::length(__s)); 819# if _LIBCPP_DEBUG_LEVEL >= 2 820 __get_db()->__insert_c(this); 821# endif 822 } 823 824 template <class = _EnableIf<__is_allocator<_Allocator>::value, nullptr_t> > 825 _LIBCPP_INLINE_VISIBILITY 826 basic_string(const _CharT* __s, const _Allocator& __a); 827 828 _LIBCPP_INLINE_VISIBILITY 829 basic_string(const _CharT* __s, size_type __n); 830 _LIBCPP_INLINE_VISIBILITY 831 basic_string(const _CharT* __s, size_type __n, const _Allocator& __a); 832 _LIBCPP_INLINE_VISIBILITY 833 basic_string(size_type __n, _CharT __c); 834 835 template <class = _EnableIf<__is_allocator<_Allocator>::value, nullptr_t> > 836 _LIBCPP_INLINE_VISIBILITY 837 basic_string(size_type __n, _CharT __c, const _Allocator& __a); 838 839 basic_string(const basic_string& __str, size_type __pos, size_type __n, 840 const _Allocator& __a = _Allocator()); 841 _LIBCPP_INLINE_VISIBILITY 842 basic_string(const basic_string& __str, size_type __pos, 843 const _Allocator& __a = _Allocator()); 844 845 template<class _Tp, class = _EnableIf<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 846 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 847 basic_string(const _Tp& __t, size_type __pos, size_type __n, 848 const allocator_type& __a = allocator_type()); 849 850 template<class _Tp, class = _EnableIf<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && 851 !__is_same_uncvref<_Tp, basic_string>::value> > 852 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 853 explicit basic_string(const _Tp& __t); 854 855 template<class _Tp, class = _EnableIf<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 856 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 857 explicit basic_string(const _Tp& __t, const allocator_type& __a); 858 859 template<class _InputIterator, class = _EnableIf<__is_cpp17_input_iterator<_InputIterator>::value> > 860 _LIBCPP_INLINE_VISIBILITY 861 basic_string(_InputIterator __first, _InputIterator __last); 862 template<class _InputIterator, class = _EnableIf<__is_cpp17_input_iterator<_InputIterator>::value> > 863 _LIBCPP_INLINE_VISIBILITY 864 basic_string(_InputIterator __first, _InputIterator __last, const allocator_type& __a); 865#ifndef _LIBCPP_CXX03_LANG 866 _LIBCPP_INLINE_VISIBILITY 867 basic_string(initializer_list<_CharT> __il); 868 _LIBCPP_INLINE_VISIBILITY 869 basic_string(initializer_list<_CharT> __il, const _Allocator& __a); 870#endif // _LIBCPP_CXX03_LANG 871 872 inline ~basic_string(); 873 874 _LIBCPP_INLINE_VISIBILITY 875 operator __self_view() const _NOEXCEPT { return __self_view(data(), size()); } 876 877 basic_string& operator=(const basic_string& __str); 878 879 template <class _Tp, class = _EnableIf<__can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value> > 880 basic_string& operator=(const _Tp& __t) 881 {__self_view __sv = __t; return assign(__sv);} 882 883#ifndef _LIBCPP_CXX03_LANG 884 _LIBCPP_INLINE_VISIBILITY 885 basic_string& operator=(basic_string&& __str) 886 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)); 887 _LIBCPP_INLINE_VISIBILITY 888 basic_string& operator=(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 889#endif 890 _LIBCPP_INLINE_VISIBILITY basic_string& operator=(const value_type* __s) {return assign(__s);} 891 basic_string& operator=(value_type __c); 892 893#if _LIBCPP_DEBUG_LEVEL >= 2 894 _LIBCPP_INLINE_VISIBILITY 895 iterator begin() _NOEXCEPT 896 {return iterator(this, __get_pointer());} 897 _LIBCPP_INLINE_VISIBILITY 898 const_iterator begin() const _NOEXCEPT 899 {return const_iterator(this, __get_pointer());} 900 _LIBCPP_INLINE_VISIBILITY 901 iterator end() _NOEXCEPT 902 {return iterator(this, __get_pointer() + size());} 903 _LIBCPP_INLINE_VISIBILITY 904 const_iterator end() const _NOEXCEPT 905 {return const_iterator(this, __get_pointer() + size());} 906#else 907 _LIBCPP_INLINE_VISIBILITY 908 iterator begin() _NOEXCEPT 909 {return iterator(__get_pointer());} 910 _LIBCPP_INLINE_VISIBILITY 911 const_iterator begin() const _NOEXCEPT 912 {return const_iterator(__get_pointer());} 913 _LIBCPP_INLINE_VISIBILITY 914 iterator end() _NOEXCEPT 915 {return iterator(__get_pointer() + size());} 916 _LIBCPP_INLINE_VISIBILITY 917 const_iterator end() const _NOEXCEPT 918 {return const_iterator(__get_pointer() + size());} 919#endif // _LIBCPP_DEBUG_LEVEL >= 2 920 _LIBCPP_INLINE_VISIBILITY 921 reverse_iterator rbegin() _NOEXCEPT 922 {return reverse_iterator(end());} 923 _LIBCPP_INLINE_VISIBILITY 924 const_reverse_iterator rbegin() const _NOEXCEPT 925 {return const_reverse_iterator(end());} 926 _LIBCPP_INLINE_VISIBILITY 927 reverse_iterator rend() _NOEXCEPT 928 {return reverse_iterator(begin());} 929 _LIBCPP_INLINE_VISIBILITY 930 const_reverse_iterator rend() const _NOEXCEPT 931 {return const_reverse_iterator(begin());} 932 933 _LIBCPP_INLINE_VISIBILITY 934 const_iterator cbegin() const _NOEXCEPT 935 {return begin();} 936 _LIBCPP_INLINE_VISIBILITY 937 const_iterator cend() const _NOEXCEPT 938 {return end();} 939 _LIBCPP_INLINE_VISIBILITY 940 const_reverse_iterator crbegin() const _NOEXCEPT 941 {return rbegin();} 942 _LIBCPP_INLINE_VISIBILITY 943 const_reverse_iterator crend() const _NOEXCEPT 944 {return rend();} 945 946 _LIBCPP_INLINE_VISIBILITY size_type size() const _NOEXCEPT 947 {return __is_long() ? __get_long_size() : __get_short_size();} 948 _LIBCPP_INLINE_VISIBILITY size_type length() const _NOEXCEPT {return size();} 949 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT; 950 _LIBCPP_INLINE_VISIBILITY size_type capacity() const _NOEXCEPT 951 {return (__is_long() ? __get_long_cap() 952 : static_cast<size_type>(__min_cap)) - 1;} 953 954 void resize(size_type __n, value_type __c); 955 _LIBCPP_INLINE_VISIBILITY void resize(size_type __n) {resize(__n, value_type());} 956 957 void reserve(size_type __res_arg); 958 _LIBCPP_INLINE_VISIBILITY void __resize_default_init(size_type __n); 959 960 _LIBCPP_INLINE_VISIBILITY 961 void reserve() _NOEXCEPT {reserve(0);} 962 _LIBCPP_INLINE_VISIBILITY 963 void shrink_to_fit() _NOEXCEPT {reserve();} 964 _LIBCPP_INLINE_VISIBILITY 965 void clear() _NOEXCEPT; 966 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 967 bool empty() const _NOEXCEPT {return size() == 0;} 968 969 _LIBCPP_INLINE_VISIBILITY const_reference operator[](size_type __pos) const _NOEXCEPT; 970 _LIBCPP_INLINE_VISIBILITY reference operator[](size_type __pos) _NOEXCEPT; 971 972 const_reference at(size_type __n) const; 973 reference at(size_type __n); 974 975 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(const basic_string& __str) {return append(__str);} 976 977 template <class _Tp> 978 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 979 _EnableIf 980 < 981 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 982 && !__is_same_uncvref<_Tp, basic_string >::value, 983 basic_string& 984 > 985 operator+=(const _Tp& __t) {__self_view __sv = __t; return append(__sv);} 986 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(const value_type* __s) {return append(__s);} 987 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(value_type __c) {push_back(__c); return *this;} 988#ifndef _LIBCPP_CXX03_LANG 989 _LIBCPP_INLINE_VISIBILITY basic_string& operator+=(initializer_list<value_type> __il) {return append(__il);} 990#endif // _LIBCPP_CXX03_LANG 991 992 _LIBCPP_INLINE_VISIBILITY 993 basic_string& append(const basic_string& __str); 994 995 template <class _Tp> 996 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 997 _EnableIf< 998 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 999 && !__is_same_uncvref<_Tp, basic_string>::value, 1000 basic_string& 1001 > 1002 append(const _Tp& __t) { __self_view __sv = __t; return append(__sv.data(), __sv.size()); } 1003 basic_string& append(const basic_string& __str, size_type __pos, size_type __n=npos); 1004 1005 template <class _Tp> 1006 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1007 _EnableIf 1008 < 1009 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 1010 && !__is_same_uncvref<_Tp, basic_string>::value, 1011 basic_string& 1012 > 1013 append(const _Tp& __t, size_type __pos, size_type __n=npos); 1014 basic_string& append(const value_type* __s, size_type __n); 1015 basic_string& append(const value_type* __s); 1016 basic_string& append(size_type __n, value_type __c); 1017 1018 _LIBCPP_INLINE_VISIBILITY 1019 void __append_default_init(size_type __n); 1020 1021 template <class _ForwardIterator> 1022 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1023 basic_string& __append_forward_unsafe(_ForwardIterator, _ForwardIterator); 1024 template<class _InputIterator> 1025 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1026 _EnableIf 1027 < 1028 __is_exactly_cpp17_input_iterator<_InputIterator>::value 1029 || !__libcpp_string_gets_noexcept_iterator<_InputIterator>::value, 1030 basic_string& 1031 > 1032 _LIBCPP_INLINE_VISIBILITY 1033 append(_InputIterator __first, _InputIterator __last) { 1034 const basic_string __temp (__first, __last, __alloc()); 1035 append(__temp.data(), __temp.size()); 1036 return *this; 1037 } 1038 template<class _ForwardIterator> 1039 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1040 _EnableIf 1041 < 1042 __is_cpp17_forward_iterator<_ForwardIterator>::value 1043 && __libcpp_string_gets_noexcept_iterator<_ForwardIterator>::value, 1044 basic_string& 1045 > 1046 _LIBCPP_INLINE_VISIBILITY 1047 append(_ForwardIterator __first, _ForwardIterator __last) { 1048 return __append_forward_unsafe(__first, __last); 1049 } 1050 1051#ifndef _LIBCPP_CXX03_LANG 1052 _LIBCPP_INLINE_VISIBILITY 1053 basic_string& append(initializer_list<value_type> __il) {return append(__il.begin(), __il.size());} 1054#endif // _LIBCPP_CXX03_LANG 1055 1056 void push_back(value_type __c); 1057 _LIBCPP_INLINE_VISIBILITY 1058 void pop_back(); 1059 _LIBCPP_INLINE_VISIBILITY reference front() _NOEXCEPT; 1060 _LIBCPP_INLINE_VISIBILITY const_reference front() const _NOEXCEPT; 1061 _LIBCPP_INLINE_VISIBILITY reference back() _NOEXCEPT; 1062 _LIBCPP_INLINE_VISIBILITY const_reference back() const _NOEXCEPT; 1063 1064 template <class _Tp> 1065 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1066 _EnableIf 1067 < 1068 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1069 basic_string& 1070 > 1071 assign(const _Tp & __t) { __self_view __sv = __t; return assign(__sv.data(), __sv.size()); } 1072 _LIBCPP_INLINE_VISIBILITY 1073 basic_string& assign(const basic_string& __str) { return *this = __str; } 1074#ifndef _LIBCPP_CXX03_LANG 1075 _LIBCPP_INLINE_VISIBILITY 1076 basic_string& assign(basic_string&& __str) 1077 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) 1078 {*this = _VSTD::move(__str); return *this;} 1079#endif 1080 basic_string& assign(const basic_string& __str, size_type __pos, size_type __n=npos); 1081 template <class _Tp> 1082 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1083 _EnableIf 1084 < 1085 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 1086 && !__is_same_uncvref<_Tp, basic_string>::value, 1087 basic_string& 1088 > 1089 assign(const _Tp & __t, size_type __pos, size_type __n=npos); 1090 basic_string& assign(const value_type* __s, size_type __n); 1091 basic_string& assign(const value_type* __s); 1092 basic_string& assign(size_type __n, value_type __c); 1093 template<class _InputIterator> 1094 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1095 _EnableIf 1096 < 1097 __is_exactly_cpp17_input_iterator<_InputIterator>::value 1098 || !__libcpp_string_gets_noexcept_iterator<_InputIterator>::value, 1099 basic_string& 1100 > 1101 assign(_InputIterator __first, _InputIterator __last); 1102 template<class _ForwardIterator> 1103 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1104 _EnableIf 1105 < 1106 __is_cpp17_forward_iterator<_ForwardIterator>::value 1107 && __libcpp_string_gets_noexcept_iterator<_ForwardIterator>::value, 1108 basic_string& 1109 > 1110 assign(_ForwardIterator __first, _ForwardIterator __last); 1111#ifndef _LIBCPP_CXX03_LANG 1112 _LIBCPP_INLINE_VISIBILITY 1113 basic_string& assign(initializer_list<value_type> __il) {return assign(__il.begin(), __il.size());} 1114#endif // _LIBCPP_CXX03_LANG 1115 1116 _LIBCPP_INLINE_VISIBILITY 1117 basic_string& insert(size_type __pos1, const basic_string& __str); 1118 1119 template <class _Tp> 1120 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1121 _EnableIf 1122 < 1123 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1124 basic_string& 1125 > 1126 insert(size_type __pos1, const _Tp& __t) 1127 { __self_view __sv = __t; return insert(__pos1, __sv.data(), __sv.size()); } 1128 1129 template <class _Tp> 1130 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1131 _EnableIf 1132 < 1133 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1134 basic_string& 1135 > 1136 insert(size_type __pos1, const _Tp& __t, size_type __pos2, size_type __n=npos); 1137 basic_string& insert(size_type __pos1, const basic_string& __str, size_type __pos2, size_type __n=npos); 1138 basic_string& insert(size_type __pos, const value_type* __s, size_type __n); 1139 basic_string& insert(size_type __pos, const value_type* __s); 1140 basic_string& insert(size_type __pos, size_type __n, value_type __c); 1141 iterator insert(const_iterator __pos, value_type __c); 1142 _LIBCPP_INLINE_VISIBILITY 1143 iterator insert(const_iterator __pos, size_type __n, value_type __c); 1144 template<class _InputIterator> 1145 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1146 _EnableIf 1147 < 1148 __is_exactly_cpp17_input_iterator<_InputIterator>::value 1149 || !__libcpp_string_gets_noexcept_iterator<_InputIterator>::value, 1150 iterator 1151 > 1152 insert(const_iterator __pos, _InputIterator __first, _InputIterator __last); 1153 template<class _ForwardIterator> 1154 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1155 _EnableIf 1156 < 1157 __is_cpp17_forward_iterator<_ForwardIterator>::value 1158 && __libcpp_string_gets_noexcept_iterator<_ForwardIterator>::value, 1159 iterator 1160 > 1161 insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last); 1162#ifndef _LIBCPP_CXX03_LANG 1163 _LIBCPP_INLINE_VISIBILITY 1164 iterator insert(const_iterator __pos, initializer_list<value_type> __il) 1165 {return insert(__pos, __il.begin(), __il.end());} 1166#endif // _LIBCPP_CXX03_LANG 1167 1168 basic_string& erase(size_type __pos = 0, size_type __n = npos); 1169 _LIBCPP_INLINE_VISIBILITY 1170 iterator erase(const_iterator __pos); 1171 _LIBCPP_INLINE_VISIBILITY 1172 iterator erase(const_iterator __first, const_iterator __last); 1173 1174 _LIBCPP_INLINE_VISIBILITY 1175 basic_string& replace(size_type __pos1, size_type __n1, const basic_string& __str); 1176 1177 template <class _Tp> 1178 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1179 _EnableIf 1180 < 1181 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1182 basic_string& 1183 > 1184 replace(size_type __pos1, size_type __n1, const _Tp& __t) { __self_view __sv = __t; return replace(__pos1, __n1, __sv.data(), __sv.size()); } 1185 basic_string& replace(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2=npos); 1186 template <class _Tp> 1187 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1188 _EnableIf 1189 < 1190 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1191 basic_string& 1192 > 1193 replace(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2=npos); 1194 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2); 1195 basic_string& replace(size_type __pos, size_type __n1, const value_type* __s); 1196 basic_string& replace(size_type __pos, size_type __n1, size_type __n2, value_type __c); 1197 _LIBCPP_INLINE_VISIBILITY 1198 basic_string& replace(const_iterator __i1, const_iterator __i2, const basic_string& __str); 1199 1200 template <class _Tp> 1201 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1202 _EnableIf 1203 < 1204 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1205 basic_string& 1206 > 1207 replace(const_iterator __i1, const_iterator __i2, const _Tp& __t) { __self_view __sv = __t; return replace(__i1 - begin(), __i2 - __i1, __sv); } 1208 1209 _LIBCPP_INLINE_VISIBILITY 1210 basic_string& replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n); 1211 _LIBCPP_INLINE_VISIBILITY 1212 basic_string& replace(const_iterator __i1, const_iterator __i2, const value_type* __s); 1213 _LIBCPP_INLINE_VISIBILITY 1214 basic_string& replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c); 1215 template<class _InputIterator> 1216 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1217 _EnableIf 1218 < 1219 __is_cpp17_input_iterator<_InputIterator>::value, 1220 basic_string& 1221 > 1222 replace(const_iterator __i1, const_iterator __i2, _InputIterator __j1, _InputIterator __j2); 1223#ifndef _LIBCPP_CXX03_LANG 1224 _LIBCPP_INLINE_VISIBILITY 1225 basic_string& replace(const_iterator __i1, const_iterator __i2, initializer_list<value_type> __il) 1226 {return replace(__i1, __i2, __il.begin(), __il.end());} 1227#endif // _LIBCPP_CXX03_LANG 1228 1229 size_type copy(value_type* __s, size_type __n, size_type __pos = 0) const; 1230 _LIBCPP_INLINE_VISIBILITY 1231 basic_string substr(size_type __pos = 0, size_type __n = npos) const; 1232 1233 _LIBCPP_INLINE_VISIBILITY 1234 void swap(basic_string& __str) 1235#if _LIBCPP_STD_VER >= 14 1236 _NOEXCEPT; 1237#else 1238 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 1239 __is_nothrow_swappable<allocator_type>::value); 1240#endif 1241 1242 _LIBCPP_INLINE_VISIBILITY 1243 const value_type* c_str() const _NOEXCEPT {return data();} 1244 _LIBCPP_INLINE_VISIBILITY 1245 const value_type* data() const _NOEXCEPT {return _VSTD::__to_address(__get_pointer());} 1246#if _LIBCPP_STD_VER > 14 || defined(_LIBCPP_BUILDING_LIBRARY) 1247 _LIBCPP_INLINE_VISIBILITY 1248 value_type* data() _NOEXCEPT {return _VSTD::__to_address(__get_pointer());} 1249#endif 1250 1251 _LIBCPP_INLINE_VISIBILITY 1252 allocator_type get_allocator() const _NOEXCEPT {return __alloc();} 1253 1254 _LIBCPP_INLINE_VISIBILITY 1255 size_type find(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1256 1257 template <class _Tp> 1258 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1259 _EnableIf 1260 < 1261 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1262 size_type 1263 > 1264 find(const _Tp& __t, size_type __pos = 0) const; 1265 size_type find(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1266 _LIBCPP_INLINE_VISIBILITY 1267 size_type find(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1268 size_type find(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1269 1270 _LIBCPP_INLINE_VISIBILITY 1271 size_type rfind(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1272 1273 template <class _Tp> 1274 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1275 _EnableIf 1276 < 1277 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1278 size_type 1279 > 1280 rfind(const _Tp& __t, size_type __pos = npos) const; 1281 size_type rfind(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1282 _LIBCPP_INLINE_VISIBILITY 1283 size_type rfind(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1284 size_type rfind(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1285 1286 _LIBCPP_INLINE_VISIBILITY 1287 size_type find_first_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1288 1289 template <class _Tp> 1290 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1291 _EnableIf 1292 < 1293 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1294 size_type 1295 > 1296 find_first_of(const _Tp& __t, size_type __pos = 0) const; 1297 size_type find_first_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1298 _LIBCPP_INLINE_VISIBILITY 1299 size_type find_first_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1300 _LIBCPP_INLINE_VISIBILITY 1301 size_type find_first_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1302 1303 _LIBCPP_INLINE_VISIBILITY 1304 size_type find_last_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1305 1306 template <class _Tp> 1307 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1308 _EnableIf 1309 < 1310 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1311 size_type 1312 > 1313 find_last_of(const _Tp& __t, size_type __pos = npos) const; 1314 size_type find_last_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1315 _LIBCPP_INLINE_VISIBILITY 1316 size_type find_last_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1317 _LIBCPP_INLINE_VISIBILITY 1318 size_type find_last_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1319 1320 _LIBCPP_INLINE_VISIBILITY 1321 size_type find_first_not_of(const basic_string& __str, size_type __pos = 0) const _NOEXCEPT; 1322 1323 template <class _Tp> 1324 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1325 _EnableIf 1326 < 1327 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1328 size_type 1329 > 1330 find_first_not_of(const _Tp &__t, size_type __pos = 0) const; 1331 size_type find_first_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1332 _LIBCPP_INLINE_VISIBILITY 1333 size_type find_first_not_of(const value_type* __s, size_type __pos = 0) const _NOEXCEPT; 1334 _LIBCPP_INLINE_VISIBILITY 1335 size_type find_first_not_of(value_type __c, size_type __pos = 0) const _NOEXCEPT; 1336 1337 _LIBCPP_INLINE_VISIBILITY 1338 size_type find_last_not_of(const basic_string& __str, size_type __pos = npos) const _NOEXCEPT; 1339 1340 template <class _Tp> 1341 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1342 _EnableIf 1343 < 1344 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1345 size_type 1346 > 1347 find_last_not_of(const _Tp& __t, size_type __pos = npos) const; 1348 size_type find_last_not_of(const value_type* __s, size_type __pos, size_type __n) const _NOEXCEPT; 1349 _LIBCPP_INLINE_VISIBILITY 1350 size_type find_last_not_of(const value_type* __s, size_type __pos = npos) const _NOEXCEPT; 1351 _LIBCPP_INLINE_VISIBILITY 1352 size_type find_last_not_of(value_type __c, size_type __pos = npos) const _NOEXCEPT; 1353 1354 _LIBCPP_INLINE_VISIBILITY 1355 int compare(const basic_string& __str) const _NOEXCEPT; 1356 1357 template <class _Tp> 1358 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1359 _EnableIf 1360 < 1361 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1362 int 1363 > 1364 compare(const _Tp &__t) const; 1365 1366 template <class _Tp> 1367 _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 1368 _EnableIf 1369 < 1370 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 1371 int 1372 > 1373 compare(size_type __pos1, size_type __n1, const _Tp& __t) const; 1374 1375 _LIBCPP_INLINE_VISIBILITY 1376 int compare(size_type __pos1, size_type __n1, const basic_string& __str) const; 1377 int compare(size_type __pos1, size_type __n1, const basic_string& __str, size_type __pos2, size_type __n2=npos) const; 1378 1379 template <class _Tp> 1380 inline _LIBCPP_INLINE_VISIBILITY 1381 _EnableIf 1382 < 1383 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string>::value, 1384 int 1385 > 1386 compare(size_type __pos1, size_type __n1, const _Tp& __t, size_type __pos2, size_type __n2=npos) const; 1387 int compare(const value_type* __s) const _NOEXCEPT; 1388 int compare(size_type __pos1, size_type __n1, const value_type* __s) const; 1389 int compare(size_type __pos1, size_type __n1, const value_type* __s, size_type __n2) const; 1390 1391#if _LIBCPP_STD_VER > 17 1392 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1393 bool starts_with(__self_view __sv) const _NOEXCEPT 1394 { return __self_view(data(), size()).starts_with(__sv); } 1395 1396 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1397 bool starts_with(value_type __c) const _NOEXCEPT 1398 { return !empty() && _Traits::eq(front(), __c); } 1399 1400 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1401 bool starts_with(const value_type* __s) const _NOEXCEPT 1402 { return starts_with(__self_view(__s)); } 1403 1404 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1405 bool ends_with(__self_view __sv) const _NOEXCEPT 1406 { return __self_view(data(), size()).ends_with( __sv); } 1407 1408 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1409 bool ends_with(value_type __c) const _NOEXCEPT 1410 { return !empty() && _Traits::eq(back(), __c); } 1411 1412 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1413 bool ends_with(const value_type* __s) const _NOEXCEPT 1414 { return ends_with(__self_view(__s)); } 1415#endif 1416 1417 _LIBCPP_INLINE_VISIBILITY bool __invariants() const; 1418 1419 _LIBCPP_INLINE_VISIBILITY void __clear_and_shrink() _NOEXCEPT; 1420 1421 _LIBCPP_INLINE_VISIBILITY 1422 bool __is_long() const _NOEXCEPT 1423 {return bool(__r_.first().__s.__size_ & __short_mask);} 1424 1425#if _LIBCPP_DEBUG_LEVEL >= 2 1426 1427 bool __dereferenceable(const const_iterator* __i) const; 1428 bool __decrementable(const const_iterator* __i) const; 1429 bool __addable(const const_iterator* __i, ptrdiff_t __n) const; 1430 bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const; 1431 1432#endif // _LIBCPP_DEBUG_LEVEL >= 2 1433 1434private: 1435 _LIBCPP_INLINE_VISIBILITY 1436 allocator_type& __alloc() _NOEXCEPT 1437 {return __r_.second();} 1438 _LIBCPP_INLINE_VISIBILITY 1439 const allocator_type& __alloc() const _NOEXCEPT 1440 {return __r_.second();} 1441 1442#ifdef _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 1443 1444 _LIBCPP_INLINE_VISIBILITY 1445 void __set_short_size(size_type __s) _NOEXCEPT 1446# ifdef _LIBCPP_BIG_ENDIAN 1447 {__r_.first().__s.__size_ = (unsigned char)(__s << 1);} 1448# else 1449 {__r_.first().__s.__size_ = (unsigned char)(__s);} 1450# endif 1451 1452 _LIBCPP_INLINE_VISIBILITY 1453 size_type __get_short_size() const _NOEXCEPT 1454# ifdef _LIBCPP_BIG_ENDIAN 1455 {return __r_.first().__s.__size_ >> 1;} 1456# else 1457 {return __r_.first().__s.__size_;} 1458# endif 1459 1460#else // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 1461 1462 _LIBCPP_INLINE_VISIBILITY 1463 void __set_short_size(size_type __s) _NOEXCEPT 1464# ifdef _LIBCPP_BIG_ENDIAN 1465 {__r_.first().__s.__size_ = (unsigned char)(__s);} 1466# else 1467 {__r_.first().__s.__size_ = (unsigned char)(__s << 1);} 1468# endif 1469 1470 _LIBCPP_INLINE_VISIBILITY 1471 size_type __get_short_size() const _NOEXCEPT 1472# ifdef _LIBCPP_BIG_ENDIAN 1473 {return __r_.first().__s.__size_;} 1474# else 1475 {return __r_.first().__s.__size_ >> 1;} 1476# endif 1477 1478#endif // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 1479 1480 _LIBCPP_INLINE_VISIBILITY 1481 void __set_long_size(size_type __s) _NOEXCEPT 1482 {__r_.first().__l.__size_ = __s;} 1483 _LIBCPP_INLINE_VISIBILITY 1484 size_type __get_long_size() const _NOEXCEPT 1485 {return __r_.first().__l.__size_;} 1486 _LIBCPP_INLINE_VISIBILITY 1487 void __set_size(size_type __s) _NOEXCEPT 1488 {if (__is_long()) __set_long_size(__s); else __set_short_size(__s);} 1489 1490 _LIBCPP_INLINE_VISIBILITY 1491 void __set_long_cap(size_type __s) _NOEXCEPT 1492 {__r_.first().__l.__cap_ = __long_mask | __s;} 1493 _LIBCPP_INLINE_VISIBILITY 1494 size_type __get_long_cap() const _NOEXCEPT 1495 {return __r_.first().__l.__cap_ & size_type(~__long_mask);} 1496 1497 _LIBCPP_INLINE_VISIBILITY 1498 void __set_long_pointer(pointer __p) _NOEXCEPT 1499 {__r_.first().__l.__data_ = __p;} 1500 _LIBCPP_INLINE_VISIBILITY 1501 pointer __get_long_pointer() _NOEXCEPT 1502 {return __r_.first().__l.__data_;} 1503 _LIBCPP_INLINE_VISIBILITY 1504 const_pointer __get_long_pointer() const _NOEXCEPT 1505 {return __r_.first().__l.__data_;} 1506 _LIBCPP_INLINE_VISIBILITY 1507 pointer __get_short_pointer() _NOEXCEPT 1508 {return pointer_traits<pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1509 _LIBCPP_INLINE_VISIBILITY 1510 const_pointer __get_short_pointer() const _NOEXCEPT 1511 {return pointer_traits<const_pointer>::pointer_to(__r_.first().__s.__data_[0]);} 1512 _LIBCPP_INLINE_VISIBILITY 1513 pointer __get_pointer() _NOEXCEPT 1514 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1515 _LIBCPP_INLINE_VISIBILITY 1516 const_pointer __get_pointer() const _NOEXCEPT 1517 {return __is_long() ? __get_long_pointer() : __get_short_pointer();} 1518 1519 _LIBCPP_INLINE_VISIBILITY 1520 void __zero() _NOEXCEPT 1521 { 1522 size_type (&__a)[__n_words] = __r_.first().__r.__words; 1523 for (unsigned __i = 0; __i < __n_words; ++__i) 1524 __a[__i] = 0; 1525 } 1526 1527 template <size_type __a> static 1528 _LIBCPP_INLINE_VISIBILITY 1529 size_type __align_it(size_type __s) _NOEXCEPT 1530 {return (__s + (__a-1)) & ~(__a-1);} 1531 enum {__alignment = 16}; 1532 static _LIBCPP_INLINE_VISIBILITY 1533 size_type __recommend(size_type __s) _NOEXCEPT 1534 { 1535 if (__s < __min_cap) return static_cast<size_type>(__min_cap) - 1; 1536 size_type __guess = __align_it<sizeof(value_type) < __alignment ? 1537 __alignment/sizeof(value_type) : 1 > (__s+1) - 1; 1538 if (__guess == __min_cap) ++__guess; 1539 return __guess; 1540 } 1541 1542 inline 1543 void __init(const value_type* __s, size_type __sz, size_type __reserve); 1544 inline 1545 void __init(const value_type* __s, size_type __sz); 1546 inline 1547 void __init(size_type __n, value_type __c); 1548 1549 // Slow path for the (inlined) copy constructor for 'long' strings. 1550 // Always externally instantiated and not inlined. 1551 // Requires that __s is zero terminated. 1552 // The main reason for this function to exist is because for unstable, we 1553 // want to allow inlining of the copy constructor. However, we don't want 1554 // to call the __init() functions as those are marked as inline which may 1555 // result in over-aggressive inlining by the compiler, where our aim is 1556 // to only inline the fast path code directly in the ctor. 1557 void __init_copy_ctor_external(const value_type* __s, size_type __sz); 1558 1559 template <class _InputIterator> 1560 inline 1561 _EnableIf 1562 < 1563 __is_exactly_cpp17_input_iterator<_InputIterator>::value 1564 > 1565 __init(_InputIterator __first, _InputIterator __last); 1566 1567 template <class _ForwardIterator> 1568 inline 1569 _EnableIf 1570 < 1571 __is_cpp17_forward_iterator<_ForwardIterator>::value 1572 > 1573 __init(_ForwardIterator __first, _ForwardIterator __last); 1574 1575 void __grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 1576 size_type __n_copy, size_type __n_del, size_type __n_add = 0); 1577 void __grow_by_and_replace(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 1578 size_type __n_copy, size_type __n_del, 1579 size_type __n_add, const value_type* __p_new_stuff); 1580 1581 // __assign_no_alias is invoked for assignment operations where we 1582 // have proof that the input does not alias the current instance. 1583 // For example, operator=(basic_string) performs a 'self' check. 1584 template <bool __is_short> 1585 basic_string& __assign_no_alias(const value_type* __s, size_type __n); 1586 1587 _LIBCPP_INLINE_VISIBILITY 1588 void __erase_to_end(size_type __pos); 1589 1590 // __erase_external_with_move is invoked for erase() invocations where 1591 // `n ~= npos`, likely requiring memory moves on the string data. 1592 void __erase_external_with_move(size_type __pos, size_type __n); 1593 1594 _LIBCPP_INLINE_VISIBILITY 1595 void __copy_assign_alloc(const basic_string& __str) 1596 {__copy_assign_alloc(__str, integral_constant<bool, 1597 __alloc_traits::propagate_on_container_copy_assignment::value>());} 1598 1599 _LIBCPP_INLINE_VISIBILITY 1600 void __copy_assign_alloc(const basic_string& __str, true_type) 1601 { 1602 if (__alloc() == __str.__alloc()) 1603 __alloc() = __str.__alloc(); 1604 else 1605 { 1606 if (!__str.__is_long()) 1607 { 1608 __clear_and_shrink(); 1609 __alloc() = __str.__alloc(); 1610 } 1611 else 1612 { 1613 allocator_type __a = __str.__alloc(); 1614 pointer __p = __alloc_traits::allocate(__a, __str.__get_long_cap()); 1615 __clear_and_shrink(); 1616 __alloc() = _VSTD::move(__a); 1617 __set_long_pointer(__p); 1618 __set_long_cap(__str.__get_long_cap()); 1619 __set_long_size(__str.size()); 1620 } 1621 } 1622 } 1623 1624 _LIBCPP_INLINE_VISIBILITY 1625 void __copy_assign_alloc(const basic_string&, false_type) _NOEXCEPT 1626 {} 1627 1628#ifndef _LIBCPP_CXX03_LANG 1629 _LIBCPP_INLINE_VISIBILITY 1630 void __move_assign(basic_string& __str, false_type) 1631 _NOEXCEPT_(__alloc_traits::is_always_equal::value); 1632 _LIBCPP_INLINE_VISIBILITY 1633 void __move_assign(basic_string& __str, true_type) 1634#if _LIBCPP_STD_VER > 14 1635 _NOEXCEPT; 1636#else 1637 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value); 1638#endif 1639#endif 1640 1641 _LIBCPP_INLINE_VISIBILITY 1642 void 1643 __move_assign_alloc(basic_string& __str) 1644 _NOEXCEPT_( 1645 !__alloc_traits::propagate_on_container_move_assignment::value || 1646 is_nothrow_move_assignable<allocator_type>::value) 1647 {__move_assign_alloc(__str, integral_constant<bool, 1648 __alloc_traits::propagate_on_container_move_assignment::value>());} 1649 1650 _LIBCPP_INLINE_VISIBILITY 1651 void __move_assign_alloc(basic_string& __c, true_type) 1652 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 1653 { 1654 __alloc() = _VSTD::move(__c.__alloc()); 1655 } 1656 1657 _LIBCPP_INLINE_VISIBILITY 1658 void __move_assign_alloc(basic_string&, false_type) 1659 _NOEXCEPT 1660 {} 1661 1662 _LIBCPP_INLINE_VISIBILITY void __invalidate_all_iterators(); 1663 _LIBCPP_INLINE_VISIBILITY void __invalidate_iterators_past(size_type); 1664 1665 friend basic_string operator+<>(const basic_string&, const basic_string&); 1666 friend basic_string operator+<>(const value_type*, const basic_string&); 1667 friend basic_string operator+<>(value_type, const basic_string&); 1668 friend basic_string operator+<>(const basic_string&, const value_type*); 1669 friend basic_string operator+<>(const basic_string&, value_type); 1670}; 1671 1672// These declarations must appear before any functions are implicitly used 1673// so that they have the correct visibility specifier. 1674#ifdef _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 1675_LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, char) 1676_LIBCPP_STRING_UNSTABLE_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, wchar_t) 1677#else 1678_LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, char) 1679_LIBCPP_STRING_V1_EXTERN_TEMPLATE_LIST(_LIBCPP_EXTERN_TEMPLATE, wchar_t) 1680#endif 1681 1682 1683#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 1684template<class _InputIterator, 1685 class _CharT = typename iterator_traits<_InputIterator>::value_type, 1686 class _Allocator = allocator<_CharT>, 1687 class = _EnableIf<__is_cpp17_input_iterator<_InputIterator>::value>, 1688 class = _EnableIf<__is_allocator<_Allocator>::value> 1689 > 1690basic_string(_InputIterator, _InputIterator, _Allocator = _Allocator()) 1691 -> basic_string<_CharT, char_traits<_CharT>, _Allocator>; 1692 1693template<class _CharT, 1694 class _Traits, 1695 class _Allocator = allocator<_CharT>, 1696 class = _EnableIf<__is_allocator<_Allocator>::value> 1697 > 1698explicit basic_string(basic_string_view<_CharT, _Traits>, const _Allocator& = _Allocator()) 1699 -> basic_string<_CharT, _Traits, _Allocator>; 1700 1701template<class _CharT, 1702 class _Traits, 1703 class _Allocator = allocator<_CharT>, 1704 class = _EnableIf<__is_allocator<_Allocator>::value>, 1705 class _Sz = typename allocator_traits<_Allocator>::size_type 1706 > 1707basic_string(basic_string_view<_CharT, _Traits>, _Sz, _Sz, const _Allocator& = _Allocator()) 1708 -> basic_string<_CharT, _Traits, _Allocator>; 1709#endif 1710 1711template <class _CharT, class _Traits, class _Allocator> 1712inline 1713void 1714basic_string<_CharT, _Traits, _Allocator>::__invalidate_all_iterators() 1715{ 1716#if _LIBCPP_DEBUG_LEVEL >= 2 1717 __get_db()->__invalidate_all(this); 1718#endif // _LIBCPP_DEBUG_LEVEL >= 2 1719} 1720 1721template <class _CharT, class _Traits, class _Allocator> 1722inline 1723void 1724basic_string<_CharT, _Traits, _Allocator>::__invalidate_iterators_past(size_type 1725#if _LIBCPP_DEBUG_LEVEL >= 2 1726 __pos 1727#endif 1728 ) 1729{ 1730#if _LIBCPP_DEBUG_LEVEL >= 2 1731 __c_node* __c = __get_db()->__find_c_and_lock(this); 1732 if (__c) 1733 { 1734 const_pointer __new_last = __get_pointer() + __pos; 1735 for (__i_node** __p = __c->end_; __p != __c->beg_; ) 1736 { 1737 --__p; 1738 const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_); 1739 if (__i->base() > __new_last) 1740 { 1741 (*__p)->__c_ = nullptr; 1742 if (--__c->end_ != __p) 1743 memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*)); 1744 } 1745 } 1746 __get_db()->unlock(); 1747 } 1748#endif // _LIBCPP_DEBUG_LEVEL >= 2 1749} 1750 1751template <class _CharT, class _Traits, class _Allocator> 1752inline 1753basic_string<_CharT, _Traits, _Allocator>::basic_string() 1754 _NOEXCEPT_(is_nothrow_default_constructible<allocator_type>::value) 1755 : __r_(__default_init_tag(), __default_init_tag()) 1756{ 1757#if _LIBCPP_DEBUG_LEVEL >= 2 1758 __get_db()->__insert_c(this); 1759#endif 1760 __zero(); 1761} 1762 1763template <class _CharT, class _Traits, class _Allocator> 1764inline 1765basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __a) 1766#if _LIBCPP_STD_VER <= 14 1767 _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value) 1768#else 1769 _NOEXCEPT 1770#endif 1771: __r_(__default_init_tag(), __a) 1772{ 1773#if _LIBCPP_DEBUG_LEVEL >= 2 1774 __get_db()->__insert_c(this); 1775#endif 1776 __zero(); 1777} 1778 1779template <class _CharT, class _Traits, class _Allocator> 1780void basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, 1781 size_type __sz, 1782 size_type __reserve) 1783{ 1784 if (__reserve > max_size()) 1785 this->__throw_length_error(); 1786 pointer __p; 1787 if (__reserve < __min_cap) 1788 { 1789 __set_short_size(__sz); 1790 __p = __get_short_pointer(); 1791 } 1792 else 1793 { 1794 size_type __cap = __recommend(__reserve); 1795 __p = __alloc_traits::allocate(__alloc(), __cap+1); 1796 __set_long_pointer(__p); 1797 __set_long_cap(__cap+1); 1798 __set_long_size(__sz); 1799 } 1800 traits_type::copy(_VSTD::__to_address(__p), __s, __sz); 1801 traits_type::assign(__p[__sz], value_type()); 1802} 1803 1804template <class _CharT, class _Traits, class _Allocator> 1805void 1806basic_string<_CharT, _Traits, _Allocator>::__init(const value_type* __s, size_type __sz) 1807{ 1808 if (__sz > max_size()) 1809 this->__throw_length_error(); 1810 pointer __p; 1811 if (__sz < __min_cap) 1812 { 1813 __set_short_size(__sz); 1814 __p = __get_short_pointer(); 1815 } 1816 else 1817 { 1818 size_type __cap = __recommend(__sz); 1819 __p = __alloc_traits::allocate(__alloc(), __cap+1); 1820 __set_long_pointer(__p); 1821 __set_long_cap(__cap+1); 1822 __set_long_size(__sz); 1823 } 1824 traits_type::copy(_VSTD::__to_address(__p), __s, __sz); 1825 traits_type::assign(__p[__sz], value_type()); 1826} 1827 1828template <class _CharT, class _Traits, class _Allocator> 1829template <class> 1830basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, const _Allocator& __a) 1831 : __r_(__default_init_tag(), __a) 1832{ 1833 _LIBCPP_ASSERT(__s != nullptr, "basic_string(const char*, allocator) detected nullptr"); 1834 __init(__s, traits_type::length(__s)); 1835#if _LIBCPP_DEBUG_LEVEL >= 2 1836 __get_db()->__insert_c(this); 1837#endif 1838} 1839 1840template <class _CharT, class _Traits, class _Allocator> 1841inline 1842basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, size_type __n) 1843 : __r_(__default_init_tag(), __default_init_tag()) 1844{ 1845 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n) detected nullptr"); 1846 __init(__s, __n); 1847#if _LIBCPP_DEBUG_LEVEL >= 2 1848 __get_db()->__insert_c(this); 1849#endif 1850} 1851 1852template <class _CharT, class _Traits, class _Allocator> 1853inline 1854basic_string<_CharT, _Traits, _Allocator>::basic_string(const _CharT* __s, size_type __n, const _Allocator& __a) 1855 : __r_(__default_init_tag(), __a) 1856{ 1857 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "basic_string(const char*, n, allocator) detected nullptr"); 1858 __init(__s, __n); 1859#if _LIBCPP_DEBUG_LEVEL >= 2 1860 __get_db()->__insert_c(this); 1861#endif 1862} 1863 1864template <class _CharT, class _Traits, class _Allocator> 1865basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __str) 1866 : __r_(__default_init_tag(), __alloc_traits::select_on_container_copy_construction(__str.__alloc())) 1867{ 1868 if (!__str.__is_long()) 1869 __r_.first().__r = __str.__r_.first().__r; 1870 else 1871 __init_copy_ctor_external(_VSTD::__to_address(__str.__get_long_pointer()), 1872 __str.__get_long_size()); 1873 1874#if _LIBCPP_DEBUG_LEVEL >= 2 1875 __get_db()->__insert_c(this); 1876#endif 1877} 1878 1879template <class _CharT, class _Traits, class _Allocator> 1880basic_string<_CharT, _Traits, _Allocator>::basic_string( 1881 const basic_string& __str, const allocator_type& __a) 1882 : __r_(__default_init_tag(), __a) 1883{ 1884 if (!__str.__is_long()) 1885 __r_.first().__r = __str.__r_.first().__r; 1886 else 1887 __init_copy_ctor_external(_VSTD::__to_address(__str.__get_long_pointer()), 1888 __str.__get_long_size()); 1889#if _LIBCPP_DEBUG_LEVEL >= 2 1890 __get_db()->__insert_c(this); 1891#endif 1892} 1893 1894template <class _CharT, class _Traits, class _Allocator> 1895void basic_string<_CharT, _Traits, _Allocator>::__init_copy_ctor_external( 1896 const value_type* __s, size_type __sz) { 1897 pointer __p; 1898 if (__sz < __min_cap) { 1899 __p = __get_short_pointer(); 1900 __set_short_size(__sz); 1901 } else { 1902 if (__sz > max_size()) 1903 this->__throw_length_error(); 1904 size_t __cap = __recommend(__sz); 1905 __p = __alloc_traits::allocate(__alloc(), __cap + 1); 1906 __set_long_pointer(__p); 1907 __set_long_cap(__cap + 1); 1908 __set_long_size(__sz); 1909 } 1910 traits_type::copy(_VSTD::__to_address(__p), __s, __sz + 1); 1911} 1912 1913#ifndef _LIBCPP_CXX03_LANG 1914 1915template <class _CharT, class _Traits, class _Allocator> 1916inline 1917basic_string<_CharT, _Traits, _Allocator>::basic_string(basic_string&& __str) 1918#if _LIBCPP_STD_VER <= 14 1919 _NOEXCEPT_(is_nothrow_move_constructible<allocator_type>::value) 1920#else 1921 _NOEXCEPT 1922#endif 1923 : __r_(_VSTD::move(__str.__r_)) 1924{ 1925 __str.__zero(); 1926#if _LIBCPP_DEBUG_LEVEL >= 2 1927 __get_db()->__insert_c(this); 1928 if (__is_long()) 1929 __get_db()->swap(this, &__str); 1930#endif 1931} 1932 1933template <class _CharT, class _Traits, class _Allocator> 1934inline 1935basic_string<_CharT, _Traits, _Allocator>::basic_string(basic_string&& __str, const allocator_type& __a) 1936 : __r_(__default_init_tag(), __a) 1937{ 1938 if (__str.__is_long() && __a != __str.__alloc()) // copy, not move 1939 __init(_VSTD::__to_address(__str.__get_long_pointer()), __str.__get_long_size()); 1940 else 1941 { 1942 __r_.first().__r = __str.__r_.first().__r; 1943 __str.__zero(); 1944 } 1945#if _LIBCPP_DEBUG_LEVEL >= 2 1946 __get_db()->__insert_c(this); 1947 if (__is_long()) 1948 __get_db()->swap(this, &__str); 1949#endif 1950} 1951 1952#endif // _LIBCPP_CXX03_LANG 1953 1954template <class _CharT, class _Traits, class _Allocator> 1955void 1956basic_string<_CharT, _Traits, _Allocator>::__init(size_type __n, value_type __c) 1957{ 1958 if (__n > max_size()) 1959 this->__throw_length_error(); 1960 pointer __p; 1961 if (__n < __min_cap) 1962 { 1963 __set_short_size(__n); 1964 __p = __get_short_pointer(); 1965 } 1966 else 1967 { 1968 size_type __cap = __recommend(__n); 1969 __p = __alloc_traits::allocate(__alloc(), __cap+1); 1970 __set_long_pointer(__p); 1971 __set_long_cap(__cap+1); 1972 __set_long_size(__n); 1973 } 1974 traits_type::assign(_VSTD::__to_address(__p), __n, __c); 1975 traits_type::assign(__p[__n], value_type()); 1976} 1977 1978template <class _CharT, class _Traits, class _Allocator> 1979inline 1980basic_string<_CharT, _Traits, _Allocator>::basic_string(size_type __n, _CharT __c) 1981 : __r_(__default_init_tag(), __default_init_tag()) 1982{ 1983 __init(__n, __c); 1984#if _LIBCPP_DEBUG_LEVEL >= 2 1985 __get_db()->__insert_c(this); 1986#endif 1987} 1988 1989template <class _CharT, class _Traits, class _Allocator> 1990template <class> 1991basic_string<_CharT, _Traits, _Allocator>::basic_string(size_type __n, _CharT __c, const _Allocator& __a) 1992 : __r_(__default_init_tag(), __a) 1993{ 1994 __init(__n, __c); 1995#if _LIBCPP_DEBUG_LEVEL >= 2 1996 __get_db()->__insert_c(this); 1997#endif 1998} 1999 2000template <class _CharT, class _Traits, class _Allocator> 2001basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __str, 2002 size_type __pos, size_type __n, 2003 const _Allocator& __a) 2004 : __r_(__default_init_tag(), __a) 2005{ 2006 size_type __str_sz = __str.size(); 2007 if (__pos > __str_sz) 2008 this->__throw_out_of_range(); 2009 __init(__str.data() + __pos, _VSTD::min(__n, __str_sz - __pos)); 2010#if _LIBCPP_DEBUG_LEVEL >= 2 2011 __get_db()->__insert_c(this); 2012#endif 2013} 2014 2015template <class _CharT, class _Traits, class _Allocator> 2016inline 2017basic_string<_CharT, _Traits, _Allocator>::basic_string(const basic_string& __str, size_type __pos, 2018 const _Allocator& __a) 2019 : __r_(__default_init_tag(), __a) 2020{ 2021 size_type __str_sz = __str.size(); 2022 if (__pos > __str_sz) 2023 this->__throw_out_of_range(); 2024 __init(__str.data() + __pos, __str_sz - __pos); 2025#if _LIBCPP_DEBUG_LEVEL >= 2 2026 __get_db()->__insert_c(this); 2027#endif 2028} 2029 2030template <class _CharT, class _Traits, class _Allocator> 2031template <class _Tp, class> 2032basic_string<_CharT, _Traits, _Allocator>::basic_string( 2033 const _Tp& __t, size_type __pos, size_type __n, const allocator_type& __a) 2034 : __r_(__default_init_tag(), __a) 2035{ 2036 __self_view __sv0 = __t; 2037 __self_view __sv = __sv0.substr(__pos, __n); 2038 __init(__sv.data(), __sv.size()); 2039#if _LIBCPP_DEBUG_LEVEL >= 2 2040 __get_db()->__insert_c(this); 2041#endif 2042} 2043 2044template <class _CharT, class _Traits, class _Allocator> 2045template <class _Tp, class> 2046basic_string<_CharT, _Traits, _Allocator>::basic_string(const _Tp & __t) 2047 : __r_(__default_init_tag(), __default_init_tag()) 2048{ 2049 __self_view __sv = __t; 2050 __init(__sv.data(), __sv.size()); 2051#if _LIBCPP_DEBUG_LEVEL >= 2 2052 __get_db()->__insert_c(this); 2053#endif 2054} 2055 2056template <class _CharT, class _Traits, class _Allocator> 2057template <class _Tp, class> 2058basic_string<_CharT, _Traits, _Allocator>::basic_string(const _Tp & __t, const _Allocator& __a) 2059 : __r_(__default_init_tag(), __a) 2060{ 2061 __self_view __sv = __t; 2062 __init(__sv.data(), __sv.size()); 2063#if _LIBCPP_DEBUG_LEVEL >= 2 2064 __get_db()->__insert_c(this); 2065#endif 2066} 2067 2068template <class _CharT, class _Traits, class _Allocator> 2069template <class _InputIterator> 2070_EnableIf 2071< 2072 __is_exactly_cpp17_input_iterator<_InputIterator>::value 2073> 2074basic_string<_CharT, _Traits, _Allocator>::__init(_InputIterator __first, _InputIterator __last) 2075{ 2076 __zero(); 2077#ifndef _LIBCPP_NO_EXCEPTIONS 2078 try 2079 { 2080#endif // _LIBCPP_NO_EXCEPTIONS 2081 for (; __first != __last; ++__first) 2082 push_back(*__first); 2083#ifndef _LIBCPP_NO_EXCEPTIONS 2084 } 2085 catch (...) 2086 { 2087 if (__is_long()) 2088 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2089 throw; 2090 } 2091#endif // _LIBCPP_NO_EXCEPTIONS 2092} 2093 2094template <class _CharT, class _Traits, class _Allocator> 2095template <class _ForwardIterator> 2096_EnableIf 2097< 2098 __is_cpp17_forward_iterator<_ForwardIterator>::value 2099> 2100basic_string<_CharT, _Traits, _Allocator>::__init(_ForwardIterator __first, _ForwardIterator __last) 2101{ 2102 size_type __sz = static_cast<size_type>(_VSTD::distance(__first, __last)); 2103 if (__sz > max_size()) 2104 this->__throw_length_error(); 2105 pointer __p; 2106 if (__sz < __min_cap) 2107 { 2108 __set_short_size(__sz); 2109 __p = __get_short_pointer(); 2110 } 2111 else 2112 { 2113 size_type __cap = __recommend(__sz); 2114 __p = __alloc_traits::allocate(__alloc(), __cap+1); 2115 __set_long_pointer(__p); 2116 __set_long_cap(__cap+1); 2117 __set_long_size(__sz); 2118 } 2119 for (; __first != __last; ++__first, (void) ++__p) 2120 traits_type::assign(*__p, *__first); 2121 traits_type::assign(*__p, value_type()); 2122} 2123 2124template <class _CharT, class _Traits, class _Allocator> 2125template<class _InputIterator, class> 2126inline 2127basic_string<_CharT, _Traits, _Allocator>::basic_string(_InputIterator __first, _InputIterator __last) 2128 : __r_(__default_init_tag(), __default_init_tag()) 2129{ 2130 __init(__first, __last); 2131#if _LIBCPP_DEBUG_LEVEL >= 2 2132 __get_db()->__insert_c(this); 2133#endif 2134} 2135 2136template <class _CharT, class _Traits, class _Allocator> 2137template<class _InputIterator, class> 2138inline 2139basic_string<_CharT, _Traits, _Allocator>::basic_string(_InputIterator __first, _InputIterator __last, 2140 const allocator_type& __a) 2141 : __r_(__default_init_tag(), __a) 2142{ 2143 __init(__first, __last); 2144#if _LIBCPP_DEBUG_LEVEL >= 2 2145 __get_db()->__insert_c(this); 2146#endif 2147} 2148 2149#ifndef _LIBCPP_CXX03_LANG 2150 2151template <class _CharT, class _Traits, class _Allocator> 2152inline 2153basic_string<_CharT, _Traits, _Allocator>::basic_string( 2154 initializer_list<_CharT> __il) 2155 : __r_(__default_init_tag(), __default_init_tag()) 2156{ 2157 __init(__il.begin(), __il.end()); 2158#if _LIBCPP_DEBUG_LEVEL >= 2 2159 __get_db()->__insert_c(this); 2160#endif 2161} 2162 2163template <class _CharT, class _Traits, class _Allocator> 2164inline 2165 2166basic_string<_CharT, _Traits, _Allocator>::basic_string( 2167 initializer_list<_CharT> __il, const _Allocator& __a) 2168 : __r_(__default_init_tag(), __a) 2169{ 2170 __init(__il.begin(), __il.end()); 2171#if _LIBCPP_DEBUG_LEVEL >= 2 2172 __get_db()->__insert_c(this); 2173#endif 2174} 2175 2176#endif // _LIBCPP_CXX03_LANG 2177 2178template <class _CharT, class _Traits, class _Allocator> 2179basic_string<_CharT, _Traits, _Allocator>::~basic_string() 2180{ 2181#if _LIBCPP_DEBUG_LEVEL >= 2 2182 __get_db()->__erase_c(this); 2183#endif 2184 if (__is_long()) 2185 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), __get_long_cap()); 2186} 2187 2188template <class _CharT, class _Traits, class _Allocator> 2189void 2190basic_string<_CharT, _Traits, _Allocator>::__grow_by_and_replace 2191 (size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2192 size_type __n_copy, size_type __n_del, size_type __n_add, const value_type* __p_new_stuff) 2193{ 2194 size_type __ms = max_size(); 2195 if (__delta_cap > __ms - __old_cap - 1) 2196 this->__throw_length_error(); 2197 pointer __old_p = __get_pointer(); 2198 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2199 __recommend(_VSTD::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2200 __ms - 1; 2201 pointer __p = __alloc_traits::allocate(__alloc(), __cap+1); 2202 __invalidate_all_iterators(); 2203 if (__n_copy != 0) 2204 traits_type::copy(_VSTD::__to_address(__p), 2205 _VSTD::__to_address(__old_p), __n_copy); 2206 if (__n_add != 0) 2207 traits_type::copy(_VSTD::__to_address(__p) + __n_copy, __p_new_stuff, __n_add); 2208 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2209 if (__sec_cp_sz != 0) 2210 traits_type::copy(_VSTD::__to_address(__p) + __n_copy + __n_add, 2211 _VSTD::__to_address(__old_p) + __n_copy + __n_del, __sec_cp_sz); 2212 if (__old_cap+1 != __min_cap) 2213 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1); 2214 __set_long_pointer(__p); 2215 __set_long_cap(__cap+1); 2216 __old_sz = __n_copy + __n_add + __sec_cp_sz; 2217 __set_long_size(__old_sz); 2218 traits_type::assign(__p[__old_sz], value_type()); 2219} 2220 2221template <class _CharT, class _Traits, class _Allocator> 2222void 2223basic_string<_CharT, _Traits, _Allocator>::__grow_by(size_type __old_cap, size_type __delta_cap, size_type __old_sz, 2224 size_type __n_copy, size_type __n_del, size_type __n_add) 2225{ 2226 size_type __ms = max_size(); 2227 if (__delta_cap > __ms - __old_cap) 2228 this->__throw_length_error(); 2229 pointer __old_p = __get_pointer(); 2230 size_type __cap = __old_cap < __ms / 2 - __alignment ? 2231 __recommend(_VSTD::max(__old_cap + __delta_cap, 2 * __old_cap)) : 2232 __ms - 1; 2233 pointer __p = __alloc_traits::allocate(__alloc(), __cap+1); 2234 __invalidate_all_iterators(); 2235 if (__n_copy != 0) 2236 traits_type::copy(_VSTD::__to_address(__p), 2237 _VSTD::__to_address(__old_p), __n_copy); 2238 size_type __sec_cp_sz = __old_sz - __n_del - __n_copy; 2239 if (__sec_cp_sz != 0) 2240 traits_type::copy(_VSTD::__to_address(__p) + __n_copy + __n_add, 2241 _VSTD::__to_address(__old_p) + __n_copy + __n_del, 2242 __sec_cp_sz); 2243 if (__old_cap+1 != __min_cap) 2244 __alloc_traits::deallocate(__alloc(), __old_p, __old_cap+1); 2245 __set_long_pointer(__p); 2246 __set_long_cap(__cap+1); 2247} 2248 2249// assign 2250 2251template <class _CharT, class _Traits, class _Allocator> 2252template <bool __is_short> 2253basic_string<_CharT, _Traits, _Allocator>& 2254basic_string<_CharT, _Traits, _Allocator>::__assign_no_alias( 2255 const value_type* __s, size_type __n) { 2256 size_type __cap = __is_short ? __min_cap : __get_long_cap(); 2257 if (__n < __cap) { 2258 pointer __p = __is_short ? __get_short_pointer() : __get_long_pointer(); 2259 __is_short ? __set_short_size(__n) : __set_long_size(__n); 2260 traits_type::copy(_VSTD::__to_address(__p), __s, __n); 2261 traits_type::assign(__p[__n], value_type()); 2262 __invalidate_iterators_past(__n); 2263 } else { 2264 size_type __sz = __is_short ? __get_short_size() : __get_long_size(); 2265 __grow_by_and_replace(__cap - 1, __n - __cap + 1, __sz, 0, __sz, __n, __s); 2266 } 2267 return *this; 2268} 2269 2270template <class _CharT, class _Traits, class _Allocator> 2271basic_string<_CharT, _Traits, _Allocator>& 2272basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s, size_type __n) 2273{ 2274 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::assign received nullptr"); 2275 size_type __cap = capacity(); 2276 if (__cap >= __n) 2277 { 2278 value_type* __p = _VSTD::__to_address(__get_pointer()); 2279 traits_type::move(__p, __s, __n); 2280 traits_type::assign(__p[__n], value_type()); 2281 __set_size(__n); 2282 __invalidate_iterators_past(__n); 2283 } 2284 else 2285 { 2286 size_type __sz = size(); 2287 __grow_by_and_replace(__cap, __n - __cap, __sz, 0, __sz, __n, __s); 2288 } 2289 return *this; 2290} 2291 2292template <class _CharT, class _Traits, class _Allocator> 2293basic_string<_CharT, _Traits, _Allocator>& 2294basic_string<_CharT, _Traits, _Allocator>::assign(size_type __n, value_type __c) 2295{ 2296 size_type __cap = capacity(); 2297 if (__cap < __n) 2298 { 2299 size_type __sz = size(); 2300 __grow_by(__cap, __n - __cap, __sz, 0, __sz); 2301 } 2302 else 2303 __invalidate_iterators_past(__n); 2304 value_type* __p = _VSTD::__to_address(__get_pointer()); 2305 traits_type::assign(__p, __n, __c); 2306 traits_type::assign(__p[__n], value_type()); 2307 __set_size(__n); 2308 return *this; 2309} 2310 2311template <class _CharT, class _Traits, class _Allocator> 2312basic_string<_CharT, _Traits, _Allocator>& 2313basic_string<_CharT, _Traits, _Allocator>::operator=(value_type __c) 2314{ 2315 pointer __p; 2316 if (__is_long()) 2317 { 2318 __p = __get_long_pointer(); 2319 __set_long_size(1); 2320 } 2321 else 2322 { 2323 __p = __get_short_pointer(); 2324 __set_short_size(1); 2325 } 2326 traits_type::assign(*__p, __c); 2327 traits_type::assign(*++__p, value_type()); 2328 __invalidate_iterators_past(1); 2329 return *this; 2330} 2331 2332template <class _CharT, class _Traits, class _Allocator> 2333basic_string<_CharT, _Traits, _Allocator>& 2334basic_string<_CharT, _Traits, _Allocator>::operator=(const basic_string& __str) 2335{ 2336 if (this != &__str) { 2337 __copy_assign_alloc(__str); 2338 if (!__is_long()) { 2339 if (!__str.__is_long()) { 2340 __r_.first().__r = __str.__r_.first().__r; 2341 } else { 2342 return __assign_no_alias<true>(__str.data(), __str.size()); 2343 } 2344 } else { 2345 return __assign_no_alias<false>(__str.data(), __str.size()); 2346 } 2347 } 2348 return *this; 2349} 2350 2351#ifndef _LIBCPP_CXX03_LANG 2352 2353template <class _CharT, class _Traits, class _Allocator> 2354inline 2355void 2356basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, false_type) 2357 _NOEXCEPT_(__alloc_traits::is_always_equal::value) 2358{ 2359 if (__alloc() != __str.__alloc()) 2360 assign(__str); 2361 else 2362 __move_assign(__str, true_type()); 2363} 2364 2365template <class _CharT, class _Traits, class _Allocator> 2366inline 2367void 2368basic_string<_CharT, _Traits, _Allocator>::__move_assign(basic_string& __str, true_type) 2369#if _LIBCPP_STD_VER > 14 2370 _NOEXCEPT 2371#else 2372 _NOEXCEPT_(is_nothrow_move_assignable<allocator_type>::value) 2373#endif 2374{ 2375 if (__is_long()) { 2376 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), 2377 __get_long_cap()); 2378#if _LIBCPP_STD_VER <= 14 2379 if (!is_nothrow_move_assignable<allocator_type>::value) { 2380 __set_short_size(0); 2381 traits_type::assign(__get_short_pointer()[0], value_type()); 2382 } 2383#endif 2384 } 2385 __move_assign_alloc(__str); 2386 __r_.first() = __str.__r_.first(); 2387 __str.__set_short_size(0); 2388 traits_type::assign(__str.__get_short_pointer()[0], value_type()); 2389} 2390 2391template <class _CharT, class _Traits, class _Allocator> 2392inline 2393basic_string<_CharT, _Traits, _Allocator>& 2394basic_string<_CharT, _Traits, _Allocator>::operator=(basic_string&& __str) 2395 _NOEXCEPT_((__noexcept_move_assign_container<_Allocator, __alloc_traits>::value)) 2396{ 2397 __move_assign(__str, integral_constant<bool, 2398 __alloc_traits::propagate_on_container_move_assignment::value>()); 2399 return *this; 2400} 2401 2402#endif 2403 2404template <class _CharT, class _Traits, class _Allocator> 2405template<class _InputIterator> 2406_EnableIf 2407< 2408 __is_exactly_cpp17_input_iterator <_InputIterator>::value 2409 || !__libcpp_string_gets_noexcept_iterator<_InputIterator>::value, 2410 basic_string<_CharT, _Traits, _Allocator>& 2411> 2412basic_string<_CharT, _Traits, _Allocator>::assign(_InputIterator __first, _InputIterator __last) 2413{ 2414 const basic_string __temp(__first, __last, __alloc()); 2415 assign(__temp.data(), __temp.size()); 2416 return *this; 2417} 2418 2419template <class _CharT, class _Traits, class _Allocator> 2420template<class _ForwardIterator> 2421_EnableIf 2422< 2423 __is_cpp17_forward_iterator<_ForwardIterator>::value 2424 && __libcpp_string_gets_noexcept_iterator<_ForwardIterator>::value, 2425 basic_string<_CharT, _Traits, _Allocator>& 2426> 2427basic_string<_CharT, _Traits, _Allocator>::assign(_ForwardIterator __first, _ForwardIterator __last) 2428{ 2429 size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last)); 2430 size_type __cap = capacity(); 2431 if (__cap < __n) 2432 { 2433 size_type __sz = size(); 2434 __grow_by(__cap, __n - __cap, __sz, 0, __sz); 2435 } 2436 else 2437 __invalidate_iterators_past(__n); 2438 pointer __p = __get_pointer(); 2439 for (; __first != __last; ++__first, ++__p) 2440 traits_type::assign(*__p, *__first); 2441 traits_type::assign(*__p, value_type()); 2442 __set_size(__n); 2443 return *this; 2444} 2445 2446template <class _CharT, class _Traits, class _Allocator> 2447basic_string<_CharT, _Traits, _Allocator>& 2448basic_string<_CharT, _Traits, _Allocator>::assign(const basic_string& __str, size_type __pos, size_type __n) 2449{ 2450 size_type __sz = __str.size(); 2451 if (__pos > __sz) 2452 this->__throw_out_of_range(); 2453 return assign(__str.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2454} 2455 2456template <class _CharT, class _Traits, class _Allocator> 2457template <class _Tp> 2458_EnableIf 2459< 2460 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 2461 && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2462 basic_string<_CharT, _Traits, _Allocator>& 2463> 2464basic_string<_CharT, _Traits, _Allocator>::assign(const _Tp & __t, size_type __pos, size_type __n) 2465{ 2466 __self_view __sv = __t; 2467 size_type __sz = __sv.size(); 2468 if (__pos > __sz) 2469 this->__throw_out_of_range(); 2470 return assign(__sv.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2471} 2472 2473 2474template <class _CharT, class _Traits, class _Allocator> 2475basic_string<_CharT, _Traits, _Allocator>& 2476basic_string<_CharT, _Traits, _Allocator>::assign(const value_type* __s) 2477{ 2478 _LIBCPP_ASSERT(__s != nullptr, "string::assign received nullptr"); 2479 return assign(__s, traits_type::length(__s)); 2480} 2481 2482// append 2483 2484template <class _CharT, class _Traits, class _Allocator> 2485basic_string<_CharT, _Traits, _Allocator>& 2486basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s, size_type __n) 2487{ 2488 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::append received nullptr"); 2489 size_type __cap = capacity(); 2490 size_type __sz = size(); 2491 if (__cap - __sz >= __n) 2492 { 2493 if (__n) 2494 { 2495 value_type* __p = _VSTD::__to_address(__get_pointer()); 2496 traits_type::copy(__p + __sz, __s, __n); 2497 __sz += __n; 2498 __set_size(__sz); 2499 traits_type::assign(__p[__sz], value_type()); 2500 } 2501 } 2502 else 2503 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __sz, 0, __n, __s); 2504 return *this; 2505} 2506 2507template <class _CharT, class _Traits, class _Allocator> 2508basic_string<_CharT, _Traits, _Allocator>& 2509basic_string<_CharT, _Traits, _Allocator>::append(size_type __n, value_type __c) 2510{ 2511 if (__n) 2512 { 2513 size_type __cap = capacity(); 2514 size_type __sz = size(); 2515 if (__cap - __sz < __n) 2516 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2517 pointer __p = __get_pointer(); 2518 traits_type::assign(_VSTD::__to_address(__p) + __sz, __n, __c); 2519 __sz += __n; 2520 __set_size(__sz); 2521 traits_type::assign(__p[__sz], value_type()); 2522 } 2523 return *this; 2524} 2525 2526template <class _CharT, class _Traits, class _Allocator> 2527inline void 2528basic_string<_CharT, _Traits, _Allocator>::__append_default_init(size_type __n) 2529{ 2530 if (__n) 2531 { 2532 size_type __cap = capacity(); 2533 size_type __sz = size(); 2534 if (__cap - __sz < __n) 2535 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2536 pointer __p = __get_pointer(); 2537 __sz += __n; 2538 __set_size(__sz); 2539 traits_type::assign(__p[__sz], value_type()); 2540 } 2541} 2542 2543template <class _CharT, class _Traits, class _Allocator> 2544void 2545basic_string<_CharT, _Traits, _Allocator>::push_back(value_type __c) 2546{ 2547 bool __is_short = !__is_long(); 2548 size_type __cap; 2549 size_type __sz; 2550 if (__is_short) 2551 { 2552 __cap = __min_cap - 1; 2553 __sz = __get_short_size(); 2554 } 2555 else 2556 { 2557 __cap = __get_long_cap() - 1; 2558 __sz = __get_long_size(); 2559 } 2560 if (__sz == __cap) 2561 { 2562 __grow_by(__cap, 1, __sz, __sz, 0); 2563 __is_short = !__is_long(); 2564 } 2565 pointer __p; 2566 if (__is_short) 2567 { 2568 __p = __get_short_pointer() + __sz; 2569 __set_short_size(__sz+1); 2570 } 2571 else 2572 { 2573 __p = __get_long_pointer() + __sz; 2574 __set_long_size(__sz+1); 2575 } 2576 traits_type::assign(*__p, __c); 2577 traits_type::assign(*++__p, value_type()); 2578} 2579 2580template <class _Tp> 2581bool __ptr_in_range (const _Tp* __p, const _Tp* __first, const _Tp* __last) 2582{ 2583 return __first <= __p && __p < __last; 2584} 2585 2586template <class _Tp1, class _Tp2> 2587bool __ptr_in_range (const _Tp1*, const _Tp2*, const _Tp2*) 2588{ 2589 return false; 2590} 2591 2592template <class _CharT, class _Traits, class _Allocator> 2593template<class _ForwardIterator> 2594basic_string<_CharT, _Traits, _Allocator>& 2595basic_string<_CharT, _Traits, _Allocator>::__append_forward_unsafe( 2596 _ForwardIterator __first, _ForwardIterator __last) 2597{ 2598 static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value, 2599 "function requires a ForwardIterator"); 2600 size_type __sz = size(); 2601 size_type __cap = capacity(); 2602 size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last)); 2603 if (__n) 2604 { 2605 typedef typename iterator_traits<_ForwardIterator>::reference _CharRef; 2606 _CharRef __tmp_ref = *__first; 2607 if (__ptr_in_range(_VSTD::addressof(__tmp_ref), data(), data() + size())) 2608 { 2609 const basic_string __temp (__first, __last, __alloc()); 2610 append(__temp.data(), __temp.size()); 2611 } 2612 else 2613 { 2614 if (__cap - __sz < __n) 2615 __grow_by(__cap, __sz + __n - __cap, __sz, __sz, 0); 2616 pointer __p = __get_pointer() + __sz; 2617 for (; __first != __last; ++__p, ++__first) 2618 traits_type::assign(*__p, *__first); 2619 traits_type::assign(*__p, value_type()); 2620 __set_size(__sz + __n); 2621 } 2622 } 2623 return *this; 2624} 2625 2626template <class _CharT, class _Traits, class _Allocator> 2627inline 2628basic_string<_CharT, _Traits, _Allocator>& 2629basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str) 2630{ 2631 return append(__str.data(), __str.size()); 2632} 2633 2634template <class _CharT, class _Traits, class _Allocator> 2635basic_string<_CharT, _Traits, _Allocator>& 2636basic_string<_CharT, _Traits, _Allocator>::append(const basic_string& __str, size_type __pos, size_type __n) 2637{ 2638 size_type __sz = __str.size(); 2639 if (__pos > __sz) 2640 this->__throw_out_of_range(); 2641 return append(__str.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2642} 2643 2644template <class _CharT, class _Traits, class _Allocator> 2645template <class _Tp> 2646 _EnableIf 2647 < 2648 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2649 basic_string<_CharT, _Traits, _Allocator>& 2650 > 2651basic_string<_CharT, _Traits, _Allocator>::append(const _Tp & __t, size_type __pos, size_type __n) 2652{ 2653 __self_view __sv = __t; 2654 size_type __sz = __sv.size(); 2655 if (__pos > __sz) 2656 this->__throw_out_of_range(); 2657 return append(__sv.data() + __pos, _VSTD::min(__n, __sz - __pos)); 2658} 2659 2660template <class _CharT, class _Traits, class _Allocator> 2661basic_string<_CharT, _Traits, _Allocator>& 2662basic_string<_CharT, _Traits, _Allocator>::append(const value_type* __s) 2663{ 2664 _LIBCPP_ASSERT(__s != nullptr, "string::append received nullptr"); 2665 return append(__s, traits_type::length(__s)); 2666} 2667 2668// insert 2669 2670template <class _CharT, class _Traits, class _Allocator> 2671basic_string<_CharT, _Traits, _Allocator>& 2672basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s, size_type __n) 2673{ 2674 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::insert received nullptr"); 2675 size_type __sz = size(); 2676 if (__pos > __sz) 2677 this->__throw_out_of_range(); 2678 size_type __cap = capacity(); 2679 if (__cap - __sz >= __n) 2680 { 2681 if (__n) 2682 { 2683 value_type* __p = _VSTD::__to_address(__get_pointer()); 2684 size_type __n_move = __sz - __pos; 2685 if (__n_move != 0) 2686 { 2687 if (__p + __pos <= __s && __s < __p + __sz) 2688 __s += __n; 2689 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 2690 } 2691 traits_type::move(__p + __pos, __s, __n); 2692 __sz += __n; 2693 __set_size(__sz); 2694 traits_type::assign(__p[__sz], value_type()); 2695 } 2696 } 2697 else 2698 __grow_by_and_replace(__cap, __sz + __n - __cap, __sz, __pos, 0, __n, __s); 2699 return *this; 2700} 2701 2702template <class _CharT, class _Traits, class _Allocator> 2703basic_string<_CharT, _Traits, _Allocator>& 2704basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, size_type __n, value_type __c) 2705{ 2706 size_type __sz = size(); 2707 if (__pos > __sz) 2708 this->__throw_out_of_range(); 2709 if (__n) 2710 { 2711 size_type __cap = capacity(); 2712 value_type* __p; 2713 if (__cap - __sz >= __n) 2714 { 2715 __p = _VSTD::__to_address(__get_pointer()); 2716 size_type __n_move = __sz - __pos; 2717 if (__n_move != 0) 2718 traits_type::move(__p + __pos + __n, __p + __pos, __n_move); 2719 } 2720 else 2721 { 2722 __grow_by(__cap, __sz + __n - __cap, __sz, __pos, 0, __n); 2723 __p = _VSTD::__to_address(__get_long_pointer()); 2724 } 2725 traits_type::assign(__p + __pos, __n, __c); 2726 __sz += __n; 2727 __set_size(__sz); 2728 traits_type::assign(__p[__sz], value_type()); 2729 } 2730 return *this; 2731} 2732 2733template <class _CharT, class _Traits, class _Allocator> 2734template<class _InputIterator> 2735_EnableIf 2736< 2737 __is_exactly_cpp17_input_iterator<_InputIterator>::value 2738 || !__libcpp_string_gets_noexcept_iterator<_InputIterator>::value, 2739 typename basic_string<_CharT, _Traits, _Allocator>::iterator 2740> 2741basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _InputIterator __first, _InputIterator __last) 2742{ 2743#if _LIBCPP_DEBUG_LEVEL >= 2 2744 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2745 "string::insert(iterator, range) called with an iterator not" 2746 " referring to this string"); 2747#endif 2748 const basic_string __temp(__first, __last, __alloc()); 2749 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 2750} 2751 2752template <class _CharT, class _Traits, class _Allocator> 2753template<class _ForwardIterator> 2754_EnableIf 2755< 2756 __is_cpp17_forward_iterator<_ForwardIterator>::value 2757 && __libcpp_string_gets_noexcept_iterator<_ForwardIterator>::value, 2758 typename basic_string<_CharT, _Traits, _Allocator>::iterator 2759> 2760basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, _ForwardIterator __first, _ForwardIterator __last) 2761{ 2762#if _LIBCPP_DEBUG_LEVEL >= 2 2763 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2764 "string::insert(iterator, range) called with an iterator not" 2765 " referring to this string"); 2766#endif 2767 size_type __ip = static_cast<size_type>(__pos - begin()); 2768 size_type __n = static_cast<size_type>(_VSTD::distance(__first, __last)); 2769 if (__n) 2770 { 2771 typedef typename iterator_traits<_ForwardIterator>::reference _CharRef; 2772 _CharRef __tmp_char = *__first; 2773 if (__ptr_in_range(_VSTD::addressof(__tmp_char), data(), data() + size())) 2774 { 2775 const basic_string __temp(__first, __last, __alloc()); 2776 return insert(__pos, __temp.data(), __temp.data() + __temp.size()); 2777 } 2778 2779 size_type __sz = size(); 2780 size_type __cap = capacity(); 2781 value_type* __p; 2782 if (__cap - __sz >= __n) 2783 { 2784 __p = _VSTD::__to_address(__get_pointer()); 2785 size_type __n_move = __sz - __ip; 2786 if (__n_move != 0) 2787 traits_type::move(__p + __ip + __n, __p + __ip, __n_move); 2788 } 2789 else 2790 { 2791 __grow_by(__cap, __sz + __n - __cap, __sz, __ip, 0, __n); 2792 __p = _VSTD::__to_address(__get_long_pointer()); 2793 } 2794 __sz += __n; 2795 __set_size(__sz); 2796 traits_type::assign(__p[__sz], value_type()); 2797 for (__p += __ip; __first != __last; ++__p, ++__first) 2798 traits_type::assign(*__p, *__first); 2799 } 2800 return begin() + __ip; 2801} 2802 2803template <class _CharT, class _Traits, class _Allocator> 2804inline 2805basic_string<_CharT, _Traits, _Allocator>& 2806basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str) 2807{ 2808 return insert(__pos1, __str.data(), __str.size()); 2809} 2810 2811template <class _CharT, class _Traits, class _Allocator> 2812basic_string<_CharT, _Traits, _Allocator>& 2813basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const basic_string& __str, 2814 size_type __pos2, size_type __n) 2815{ 2816 size_type __str_sz = __str.size(); 2817 if (__pos2 > __str_sz) 2818 this->__throw_out_of_range(); 2819 return insert(__pos1, __str.data() + __pos2, _VSTD::min(__n, __str_sz - __pos2)); 2820} 2821 2822template <class _CharT, class _Traits, class _Allocator> 2823template <class _Tp> 2824_EnableIf 2825< 2826 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 2827 basic_string<_CharT, _Traits, _Allocator>& 2828> 2829basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos1, const _Tp& __t, 2830 size_type __pos2, size_type __n) 2831{ 2832 __self_view __sv = __t; 2833 size_type __str_sz = __sv.size(); 2834 if (__pos2 > __str_sz) 2835 this->__throw_out_of_range(); 2836 return insert(__pos1, __sv.data() + __pos2, _VSTD::min(__n, __str_sz - __pos2)); 2837} 2838 2839template <class _CharT, class _Traits, class _Allocator> 2840basic_string<_CharT, _Traits, _Allocator>& 2841basic_string<_CharT, _Traits, _Allocator>::insert(size_type __pos, const value_type* __s) 2842{ 2843 _LIBCPP_ASSERT(__s != nullptr, "string::insert received nullptr"); 2844 return insert(__pos, __s, traits_type::length(__s)); 2845} 2846 2847template <class _CharT, class _Traits, class _Allocator> 2848typename basic_string<_CharT, _Traits, _Allocator>::iterator 2849basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, value_type __c) 2850{ 2851 size_type __ip = static_cast<size_type>(__pos - begin()); 2852 size_type __sz = size(); 2853 size_type __cap = capacity(); 2854 value_type* __p; 2855 if (__cap == __sz) 2856 { 2857 __grow_by(__cap, 1, __sz, __ip, 0, 1); 2858 __p = _VSTD::__to_address(__get_long_pointer()); 2859 } 2860 else 2861 { 2862 __p = _VSTD::__to_address(__get_pointer()); 2863 size_type __n_move = __sz - __ip; 2864 if (__n_move != 0) 2865 traits_type::move(__p + __ip + 1, __p + __ip, __n_move); 2866 } 2867 traits_type::assign(__p[__ip], __c); 2868 traits_type::assign(__p[++__sz], value_type()); 2869 __set_size(__sz); 2870 return begin() + static_cast<difference_type>(__ip); 2871} 2872 2873template <class _CharT, class _Traits, class _Allocator> 2874inline 2875typename basic_string<_CharT, _Traits, _Allocator>::iterator 2876basic_string<_CharT, _Traits, _Allocator>::insert(const_iterator __pos, size_type __n, value_type __c) 2877{ 2878#if _LIBCPP_DEBUG_LEVEL >= 2 2879 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 2880 "string::insert(iterator, n, value) called with an iterator not" 2881 " referring to this string"); 2882#endif 2883 difference_type __p = __pos - begin(); 2884 insert(static_cast<size_type>(__p), __n, __c); 2885 return begin() + __p; 2886} 2887 2888// replace 2889 2890template <class _CharT, class _Traits, class _Allocator> 2891basic_string<_CharT, _Traits, _Allocator>& 2892basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s, size_type __n2) 2893 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 2894{ 2895 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::replace received nullptr"); 2896 size_type __sz = size(); 2897 if (__pos > __sz) 2898 this->__throw_out_of_range(); 2899 __n1 = _VSTD::min(__n1, __sz - __pos); 2900 size_type __cap = capacity(); 2901 if (__cap - __sz + __n1 >= __n2) 2902 { 2903 value_type* __p = _VSTD::__to_address(__get_pointer()); 2904 if (__n1 != __n2) 2905 { 2906 size_type __n_move = __sz - __pos - __n1; 2907 if (__n_move != 0) 2908 { 2909 if (__n1 > __n2) 2910 { 2911 traits_type::move(__p + __pos, __s, __n2); 2912 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2913 goto __finish; 2914 } 2915 if (__p + __pos < __s && __s < __p + __sz) 2916 { 2917 if (__p + __pos + __n1 <= __s) 2918 __s += __n2 - __n1; 2919 else // __p + __pos < __s < __p + __pos + __n1 2920 { 2921 traits_type::move(__p + __pos, __s, __n1); 2922 __pos += __n1; 2923 __s += __n2; 2924 __n2 -= __n1; 2925 __n1 = 0; 2926 } 2927 } 2928 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2929 } 2930 } 2931 traits_type::move(__p + __pos, __s, __n2); 2932__finish: 2933// __sz += __n2 - __n1; in this and the below function below can cause unsigned 2934// integer overflow, but this is a safe operation, so we disable the check. 2935 __sz += __n2 - __n1; 2936 __set_size(__sz); 2937 __invalidate_iterators_past(__sz); 2938 traits_type::assign(__p[__sz], value_type()); 2939 } 2940 else 2941 __grow_by_and_replace(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2, __s); 2942 return *this; 2943} 2944 2945template <class _CharT, class _Traits, class _Allocator> 2946basic_string<_CharT, _Traits, _Allocator>& 2947basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, size_type __n2, value_type __c) 2948 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 2949{ 2950 size_type __sz = size(); 2951 if (__pos > __sz) 2952 this->__throw_out_of_range(); 2953 __n1 = _VSTD::min(__n1, __sz - __pos); 2954 size_type __cap = capacity(); 2955 value_type* __p; 2956 if (__cap - __sz + __n1 >= __n2) 2957 { 2958 __p = _VSTD::__to_address(__get_pointer()); 2959 if (__n1 != __n2) 2960 { 2961 size_type __n_move = __sz - __pos - __n1; 2962 if (__n_move != 0) 2963 traits_type::move(__p + __pos + __n2, __p + __pos + __n1, __n_move); 2964 } 2965 } 2966 else 2967 { 2968 __grow_by(__cap, __sz - __n1 + __n2 - __cap, __sz, __pos, __n1, __n2); 2969 __p = _VSTD::__to_address(__get_long_pointer()); 2970 } 2971 traits_type::assign(__p + __pos, __n2, __c); 2972 __sz += __n2 - __n1; 2973 __set_size(__sz); 2974 __invalidate_iterators_past(__sz); 2975 traits_type::assign(__p[__sz], value_type()); 2976 return *this; 2977} 2978 2979template <class _CharT, class _Traits, class _Allocator> 2980template<class _InputIterator> 2981_EnableIf 2982< 2983 __is_cpp17_input_iterator<_InputIterator>::value, 2984 basic_string<_CharT, _Traits, _Allocator>& 2985> 2986basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, 2987 _InputIterator __j1, _InputIterator __j2) 2988{ 2989 const basic_string __temp(__j1, __j2, __alloc()); 2990 return this->replace(__i1, __i2, __temp); 2991} 2992 2993template <class _CharT, class _Traits, class _Allocator> 2994inline 2995basic_string<_CharT, _Traits, _Allocator>& 2996basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str) 2997{ 2998 return replace(__pos1, __n1, __str.data(), __str.size()); 2999} 3000 3001template <class _CharT, class _Traits, class _Allocator> 3002basic_string<_CharT, _Traits, _Allocator>& 3003basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const basic_string& __str, 3004 size_type __pos2, size_type __n2) 3005{ 3006 size_type __str_sz = __str.size(); 3007 if (__pos2 > __str_sz) 3008 this->__throw_out_of_range(); 3009 return replace(__pos1, __n1, __str.data() + __pos2, _VSTD::min(__n2, __str_sz - __pos2)); 3010} 3011 3012template <class _CharT, class _Traits, class _Allocator> 3013template <class _Tp> 3014_EnableIf 3015< 3016 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3017 basic_string<_CharT, _Traits, _Allocator>& 3018> 3019basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos1, size_type __n1, const _Tp& __t, 3020 size_type __pos2, size_type __n2) 3021{ 3022 __self_view __sv = __t; 3023 size_type __str_sz = __sv.size(); 3024 if (__pos2 > __str_sz) 3025 this->__throw_out_of_range(); 3026 return replace(__pos1, __n1, __sv.data() + __pos2, _VSTD::min(__n2, __str_sz - __pos2)); 3027} 3028 3029template <class _CharT, class _Traits, class _Allocator> 3030basic_string<_CharT, _Traits, _Allocator>& 3031basic_string<_CharT, _Traits, _Allocator>::replace(size_type __pos, size_type __n1, const value_type* __s) 3032{ 3033 _LIBCPP_ASSERT(__s != nullptr, "string::replace received nullptr"); 3034 return replace(__pos, __n1, __s, traits_type::length(__s)); 3035} 3036 3037template <class _CharT, class _Traits, class _Allocator> 3038inline 3039basic_string<_CharT, _Traits, _Allocator>& 3040basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const basic_string& __str) 3041{ 3042 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), 3043 __str.data(), __str.size()); 3044} 3045 3046template <class _CharT, class _Traits, class _Allocator> 3047inline 3048basic_string<_CharT, _Traits, _Allocator>& 3049basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const value_type* __s, size_type __n) 3050{ 3051 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s, __n); 3052} 3053 3054template <class _CharT, class _Traits, class _Allocator> 3055inline 3056basic_string<_CharT, _Traits, _Allocator>& 3057basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, const value_type* __s) 3058{ 3059 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __s); 3060} 3061 3062template <class _CharT, class _Traits, class _Allocator> 3063inline 3064basic_string<_CharT, _Traits, _Allocator>& 3065basic_string<_CharT, _Traits, _Allocator>::replace(const_iterator __i1, const_iterator __i2, size_type __n, value_type __c) 3066{ 3067 return replace(static_cast<size_type>(__i1 - begin()), static_cast<size_type>(__i2 - __i1), __n, __c); 3068} 3069 3070// erase 3071 3072// 'externally instantiated' erase() implementation, called when __n != npos. 3073// Does not check __pos against size() 3074template <class _CharT, class _Traits, class _Allocator> 3075void 3076basic_string<_CharT, _Traits, _Allocator>::__erase_external_with_move( 3077 size_type __pos, size_type __n) 3078{ 3079 if (__n) 3080 { 3081 size_type __sz = size(); 3082 value_type* __p = _VSTD::__to_address(__get_pointer()); 3083 __n = _VSTD::min(__n, __sz - __pos); 3084 size_type __n_move = __sz - __pos - __n; 3085 if (__n_move != 0) 3086 traits_type::move(__p + __pos, __p + __pos + __n, __n_move); 3087 __sz -= __n; 3088 __set_size(__sz); 3089 __invalidate_iterators_past(__sz); 3090 traits_type::assign(__p[__sz], value_type()); 3091 } 3092} 3093 3094template <class _CharT, class _Traits, class _Allocator> 3095basic_string<_CharT, _Traits, _Allocator>& 3096basic_string<_CharT, _Traits, _Allocator>::erase(size_type __pos, 3097 size_type __n) { 3098 if (__pos > size()) this->__throw_out_of_range(); 3099 if (__n == npos) { 3100 __erase_to_end(__pos); 3101 } else { 3102 __erase_external_with_move(__pos, __n); 3103 } 3104 return *this; 3105} 3106 3107template <class _CharT, class _Traits, class _Allocator> 3108inline 3109typename basic_string<_CharT, _Traits, _Allocator>::iterator 3110basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __pos) 3111{ 3112#if _LIBCPP_DEBUG_LEVEL >= 2 3113 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__pos) == this, 3114 "string::erase(iterator) called with an iterator not" 3115 " referring to this string"); 3116#endif 3117 _LIBCPP_ASSERT(__pos != end(), 3118 "string::erase(iterator) called with a non-dereferenceable iterator"); 3119 iterator __b = begin(); 3120 size_type __r = static_cast<size_type>(__pos - __b); 3121 erase(__r, 1); 3122 return __b + static_cast<difference_type>(__r); 3123} 3124 3125template <class _CharT, class _Traits, class _Allocator> 3126inline 3127typename basic_string<_CharT, _Traits, _Allocator>::iterator 3128basic_string<_CharT, _Traits, _Allocator>::erase(const_iterator __first, const_iterator __last) 3129{ 3130#if _LIBCPP_DEBUG_LEVEL >= 2 3131 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__first) == this, 3132 "string::erase(iterator, iterator) called with an iterator not" 3133 " referring to this string"); 3134#endif 3135 _LIBCPP_ASSERT(__first <= __last, "string::erase(first, last) called with invalid range"); 3136 iterator __b = begin(); 3137 size_type __r = static_cast<size_type>(__first - __b); 3138 erase(__r, static_cast<size_type>(__last - __first)); 3139 return __b + static_cast<difference_type>(__r); 3140} 3141 3142template <class _CharT, class _Traits, class _Allocator> 3143inline 3144void 3145basic_string<_CharT, _Traits, _Allocator>::pop_back() 3146{ 3147 _LIBCPP_ASSERT(!empty(), "string::pop_back(): string is already empty"); 3148 size_type __sz; 3149 if (__is_long()) 3150 { 3151 __sz = __get_long_size() - 1; 3152 __set_long_size(__sz); 3153 traits_type::assign(*(__get_long_pointer() + __sz), value_type()); 3154 } 3155 else 3156 { 3157 __sz = __get_short_size() - 1; 3158 __set_short_size(__sz); 3159 traits_type::assign(*(__get_short_pointer() + __sz), value_type()); 3160 } 3161 __invalidate_iterators_past(__sz); 3162} 3163 3164template <class _CharT, class _Traits, class _Allocator> 3165inline 3166void 3167basic_string<_CharT, _Traits, _Allocator>::clear() _NOEXCEPT 3168{ 3169 __invalidate_all_iterators(); 3170 if (__is_long()) 3171 { 3172 traits_type::assign(*__get_long_pointer(), value_type()); 3173 __set_long_size(0); 3174 } 3175 else 3176 { 3177 traits_type::assign(*__get_short_pointer(), value_type()); 3178 __set_short_size(0); 3179 } 3180} 3181 3182template <class _CharT, class _Traits, class _Allocator> 3183inline 3184void 3185basic_string<_CharT, _Traits, _Allocator>::__erase_to_end(size_type __pos) 3186{ 3187 if (__is_long()) 3188 { 3189 traits_type::assign(*(__get_long_pointer() + __pos), value_type()); 3190 __set_long_size(__pos); 3191 } 3192 else 3193 { 3194 traits_type::assign(*(__get_short_pointer() + __pos), value_type()); 3195 __set_short_size(__pos); 3196 } 3197 __invalidate_iterators_past(__pos); 3198} 3199 3200template <class _CharT, class _Traits, class _Allocator> 3201void 3202basic_string<_CharT, _Traits, _Allocator>::resize(size_type __n, value_type __c) 3203{ 3204 size_type __sz = size(); 3205 if (__n > __sz) 3206 append(__n - __sz, __c); 3207 else 3208 __erase_to_end(__n); 3209} 3210 3211template <class _CharT, class _Traits, class _Allocator> 3212inline void 3213basic_string<_CharT, _Traits, _Allocator>::__resize_default_init(size_type __n) 3214{ 3215 size_type __sz = size(); 3216 if (__n > __sz) { 3217 __append_default_init(__n - __sz); 3218 } else 3219 __erase_to_end(__n); 3220} 3221 3222template <class _CharT, class _Traits, class _Allocator> 3223inline 3224typename basic_string<_CharT, _Traits, _Allocator>::size_type 3225basic_string<_CharT, _Traits, _Allocator>::max_size() const _NOEXCEPT 3226{ 3227 size_type __m = __alloc_traits::max_size(__alloc()); 3228#ifdef _LIBCPP_BIG_ENDIAN 3229 return (__m <= ~__long_mask ? __m : __m/2) - __alignment; 3230#else 3231 return __m - __alignment; 3232#endif 3233} 3234 3235template <class _CharT, class _Traits, class _Allocator> 3236void 3237basic_string<_CharT, _Traits, _Allocator>::reserve(size_type __res_arg) 3238{ 3239 if (__res_arg > max_size()) 3240 this->__throw_length_error(); 3241 size_type __cap = capacity(); 3242 size_type __sz = size(); 3243 __res_arg = _VSTD::max(__res_arg, __sz); 3244 __res_arg = __recommend(__res_arg); 3245 if (__res_arg != __cap) 3246 { 3247 pointer __new_data, __p; 3248 bool __was_long, __now_long; 3249 if (__res_arg == __min_cap - 1) 3250 { 3251 __was_long = true; 3252 __now_long = false; 3253 __new_data = __get_short_pointer(); 3254 __p = __get_long_pointer(); 3255 } 3256 else 3257 { 3258 if (__res_arg > __cap) 3259 __new_data = __alloc_traits::allocate(__alloc(), __res_arg+1); 3260 else 3261 { 3262 #ifndef _LIBCPP_NO_EXCEPTIONS 3263 try 3264 { 3265 #endif // _LIBCPP_NO_EXCEPTIONS 3266 __new_data = __alloc_traits::allocate(__alloc(), __res_arg+1); 3267 #ifndef _LIBCPP_NO_EXCEPTIONS 3268 } 3269 catch (...) 3270 { 3271 return; 3272 } 3273 #else // _LIBCPP_NO_EXCEPTIONS 3274 if (__new_data == nullptr) 3275 return; 3276 #endif // _LIBCPP_NO_EXCEPTIONS 3277 } 3278 __now_long = true; 3279 __was_long = __is_long(); 3280 __p = __get_pointer(); 3281 } 3282 traits_type::copy(_VSTD::__to_address(__new_data), 3283 _VSTD::__to_address(__p), size()+1); 3284 if (__was_long) 3285 __alloc_traits::deallocate(__alloc(), __p, __cap+1); 3286 if (__now_long) 3287 { 3288 __set_long_cap(__res_arg+1); 3289 __set_long_size(__sz); 3290 __set_long_pointer(__new_data); 3291 } 3292 else 3293 __set_short_size(__sz); 3294 __invalidate_all_iterators(); 3295 } 3296} 3297 3298template <class _CharT, class _Traits, class _Allocator> 3299inline 3300typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3301basic_string<_CharT, _Traits, _Allocator>::operator[](size_type __pos) const _NOEXCEPT 3302{ 3303 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 3304 return *(data() + __pos); 3305} 3306 3307template <class _CharT, class _Traits, class _Allocator> 3308inline 3309typename basic_string<_CharT, _Traits, _Allocator>::reference 3310basic_string<_CharT, _Traits, _Allocator>::operator[](size_type __pos) _NOEXCEPT 3311{ 3312 _LIBCPP_ASSERT(__pos <= size(), "string index out of bounds"); 3313 return *(__get_pointer() + __pos); 3314} 3315 3316template <class _CharT, class _Traits, class _Allocator> 3317typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3318basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) const 3319{ 3320 if (__n >= size()) 3321 this->__throw_out_of_range(); 3322 return (*this)[__n]; 3323} 3324 3325template <class _CharT, class _Traits, class _Allocator> 3326typename basic_string<_CharT, _Traits, _Allocator>::reference 3327basic_string<_CharT, _Traits, _Allocator>::at(size_type __n) 3328{ 3329 if (__n >= size()) 3330 this->__throw_out_of_range(); 3331 return (*this)[__n]; 3332} 3333 3334template <class _CharT, class _Traits, class _Allocator> 3335inline 3336typename basic_string<_CharT, _Traits, _Allocator>::reference 3337basic_string<_CharT, _Traits, _Allocator>::front() _NOEXCEPT 3338{ 3339 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 3340 return *__get_pointer(); 3341} 3342 3343template <class _CharT, class _Traits, class _Allocator> 3344inline 3345typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3346basic_string<_CharT, _Traits, _Allocator>::front() const _NOEXCEPT 3347{ 3348 _LIBCPP_ASSERT(!empty(), "string::front(): string is empty"); 3349 return *data(); 3350} 3351 3352template <class _CharT, class _Traits, class _Allocator> 3353inline 3354typename basic_string<_CharT, _Traits, _Allocator>::reference 3355basic_string<_CharT, _Traits, _Allocator>::back() _NOEXCEPT 3356{ 3357 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 3358 return *(__get_pointer() + size() - 1); 3359} 3360 3361template <class _CharT, class _Traits, class _Allocator> 3362inline 3363typename basic_string<_CharT, _Traits, _Allocator>::const_reference 3364basic_string<_CharT, _Traits, _Allocator>::back() const _NOEXCEPT 3365{ 3366 _LIBCPP_ASSERT(!empty(), "string::back(): string is empty"); 3367 return *(data() + size() - 1); 3368} 3369 3370template <class _CharT, class _Traits, class _Allocator> 3371typename basic_string<_CharT, _Traits, _Allocator>::size_type 3372basic_string<_CharT, _Traits, _Allocator>::copy(value_type* __s, size_type __n, size_type __pos) const 3373{ 3374 size_type __sz = size(); 3375 if (__pos > __sz) 3376 this->__throw_out_of_range(); 3377 size_type __rlen = _VSTD::min(__n, __sz - __pos); 3378 traits_type::copy(__s, data() + __pos, __rlen); 3379 return __rlen; 3380} 3381 3382template <class _CharT, class _Traits, class _Allocator> 3383inline 3384basic_string<_CharT, _Traits, _Allocator> 3385basic_string<_CharT, _Traits, _Allocator>::substr(size_type __pos, size_type __n) const 3386{ 3387 return basic_string(*this, __pos, __n, __alloc()); 3388} 3389 3390template <class _CharT, class _Traits, class _Allocator> 3391inline 3392void 3393basic_string<_CharT, _Traits, _Allocator>::swap(basic_string& __str) 3394#if _LIBCPP_STD_VER >= 14 3395 _NOEXCEPT 3396#else 3397 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value || 3398 __is_nothrow_swappable<allocator_type>::value) 3399#endif 3400{ 3401#if _LIBCPP_DEBUG_LEVEL >= 2 3402 if (!__is_long()) 3403 __get_db()->__invalidate_all(this); 3404 if (!__str.__is_long()) 3405 __get_db()->__invalidate_all(&__str); 3406 __get_db()->swap(this, &__str); 3407#endif 3408 _LIBCPP_ASSERT( 3409 __alloc_traits::propagate_on_container_swap::value || 3410 __alloc_traits::is_always_equal::value || 3411 __alloc() == __str.__alloc(), "swapping non-equal allocators"); 3412 _VSTD::swap(__r_.first(), __str.__r_.first()); 3413 __swap_allocator(__alloc(), __str.__alloc()); 3414} 3415 3416// find 3417 3418template <class _Traits> 3419struct _LIBCPP_HIDDEN __traits_eq 3420{ 3421 typedef typename _Traits::char_type char_type; 3422 _LIBCPP_INLINE_VISIBILITY 3423 bool operator()(const char_type& __x, const char_type& __y) _NOEXCEPT 3424 {return _Traits::eq(__x, __y);} 3425}; 3426 3427template<class _CharT, class _Traits, class _Allocator> 3428typename basic_string<_CharT, _Traits, _Allocator>::size_type 3429basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3430 size_type __pos, 3431 size_type __n) const _NOEXCEPT 3432{ 3433 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find(): received nullptr"); 3434 return __str_find<value_type, size_type, traits_type, npos> 3435 (data(), size(), __s, __pos, __n); 3436} 3437 3438template<class _CharT, class _Traits, class _Allocator> 3439inline 3440typename basic_string<_CharT, _Traits, _Allocator>::size_type 3441basic_string<_CharT, _Traits, _Allocator>::find(const basic_string& __str, 3442 size_type __pos) const _NOEXCEPT 3443{ 3444 return __str_find<value_type, size_type, traits_type, npos> 3445 (data(), size(), __str.data(), __pos, __str.size()); 3446} 3447 3448template<class _CharT, class _Traits, class _Allocator> 3449template <class _Tp> 3450_EnableIf 3451< 3452 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3453 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3454> 3455basic_string<_CharT, _Traits, _Allocator>::find(const _Tp &__t, 3456 size_type __pos) const 3457{ 3458 __self_view __sv = __t; 3459 return __str_find<value_type, size_type, traits_type, npos> 3460 (data(), size(), __sv.data(), __pos, __sv.size()); 3461} 3462 3463template<class _CharT, class _Traits, class _Allocator> 3464inline 3465typename basic_string<_CharT, _Traits, _Allocator>::size_type 3466basic_string<_CharT, _Traits, _Allocator>::find(const value_type* __s, 3467 size_type __pos) const _NOEXCEPT 3468{ 3469 _LIBCPP_ASSERT(__s != nullptr, "string::find(): received nullptr"); 3470 return __str_find<value_type, size_type, traits_type, npos> 3471 (data(), size(), __s, __pos, traits_type::length(__s)); 3472} 3473 3474template<class _CharT, class _Traits, class _Allocator> 3475typename basic_string<_CharT, _Traits, _Allocator>::size_type 3476basic_string<_CharT, _Traits, _Allocator>::find(value_type __c, 3477 size_type __pos) const _NOEXCEPT 3478{ 3479 return __str_find<value_type, size_type, traits_type, npos> 3480 (data(), size(), __c, __pos); 3481} 3482 3483// rfind 3484 3485template<class _CharT, class _Traits, class _Allocator> 3486typename basic_string<_CharT, _Traits, _Allocator>::size_type 3487basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3488 size_type __pos, 3489 size_type __n) const _NOEXCEPT 3490{ 3491 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::rfind(): received nullptr"); 3492 return __str_rfind<value_type, size_type, traits_type, npos> 3493 (data(), size(), __s, __pos, __n); 3494} 3495 3496template<class _CharT, class _Traits, class _Allocator> 3497inline 3498typename basic_string<_CharT, _Traits, _Allocator>::size_type 3499basic_string<_CharT, _Traits, _Allocator>::rfind(const basic_string& __str, 3500 size_type __pos) const _NOEXCEPT 3501{ 3502 return __str_rfind<value_type, size_type, traits_type, npos> 3503 (data(), size(), __str.data(), __pos, __str.size()); 3504} 3505 3506template<class _CharT, class _Traits, class _Allocator> 3507template <class _Tp> 3508_EnableIf 3509< 3510 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3511 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3512> 3513basic_string<_CharT, _Traits, _Allocator>::rfind(const _Tp& __t, 3514 size_type __pos) const 3515{ 3516 __self_view __sv = __t; 3517 return __str_rfind<value_type, size_type, traits_type, npos> 3518 (data(), size(), __sv.data(), __pos, __sv.size()); 3519} 3520 3521template<class _CharT, class _Traits, class _Allocator> 3522inline 3523typename basic_string<_CharT, _Traits, _Allocator>::size_type 3524basic_string<_CharT, _Traits, _Allocator>::rfind(const value_type* __s, 3525 size_type __pos) const _NOEXCEPT 3526{ 3527 _LIBCPP_ASSERT(__s != nullptr, "string::rfind(): received nullptr"); 3528 return __str_rfind<value_type, size_type, traits_type, npos> 3529 (data(), size(), __s, __pos, traits_type::length(__s)); 3530} 3531 3532template<class _CharT, class _Traits, class _Allocator> 3533typename basic_string<_CharT, _Traits, _Allocator>::size_type 3534basic_string<_CharT, _Traits, _Allocator>::rfind(value_type __c, 3535 size_type __pos) const _NOEXCEPT 3536{ 3537 return __str_rfind<value_type, size_type, traits_type, npos> 3538 (data(), size(), __c, __pos); 3539} 3540 3541// find_first_of 3542 3543template<class _CharT, class _Traits, class _Allocator> 3544typename basic_string<_CharT, _Traits, _Allocator>::size_type 3545basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3546 size_type __pos, 3547 size_type __n) const _NOEXCEPT 3548{ 3549 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_of(): received nullptr"); 3550 return __str_find_first_of<value_type, size_type, traits_type, npos> 3551 (data(), size(), __s, __pos, __n); 3552} 3553 3554template<class _CharT, class _Traits, class _Allocator> 3555inline 3556typename basic_string<_CharT, _Traits, _Allocator>::size_type 3557basic_string<_CharT, _Traits, _Allocator>::find_first_of(const basic_string& __str, 3558 size_type __pos) const _NOEXCEPT 3559{ 3560 return __str_find_first_of<value_type, size_type, traits_type, npos> 3561 (data(), size(), __str.data(), __pos, __str.size()); 3562} 3563 3564template<class _CharT, class _Traits, class _Allocator> 3565template <class _Tp> 3566_EnableIf 3567< 3568 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3569 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3570> 3571basic_string<_CharT, _Traits, _Allocator>::find_first_of(const _Tp& __t, 3572 size_type __pos) const 3573{ 3574 __self_view __sv = __t; 3575 return __str_find_first_of<value_type, size_type, traits_type, npos> 3576 (data(), size(), __sv.data(), __pos, __sv.size()); 3577} 3578 3579template<class _CharT, class _Traits, class _Allocator> 3580inline 3581typename basic_string<_CharT, _Traits, _Allocator>::size_type 3582basic_string<_CharT, _Traits, _Allocator>::find_first_of(const value_type* __s, 3583 size_type __pos) const _NOEXCEPT 3584{ 3585 _LIBCPP_ASSERT(__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, traits_type::length(__s)); 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(value_type __c, 3594 size_type __pos) const _NOEXCEPT 3595{ 3596 return find(__c, __pos); 3597} 3598 3599// find_last_of 3600 3601template<class _CharT, class _Traits, class _Allocator> 3602typename basic_string<_CharT, _Traits, _Allocator>::size_type 3603basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3604 size_type __pos, 3605 size_type __n) const _NOEXCEPT 3606{ 3607 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_of(): received nullptr"); 3608 return __str_find_last_of<value_type, size_type, traits_type, npos> 3609 (data(), size(), __s, __pos, __n); 3610} 3611 3612template<class _CharT, class _Traits, class _Allocator> 3613inline 3614typename basic_string<_CharT, _Traits, _Allocator>::size_type 3615basic_string<_CharT, _Traits, _Allocator>::find_last_of(const basic_string& __str, 3616 size_type __pos) const _NOEXCEPT 3617{ 3618 return __str_find_last_of<value_type, size_type, traits_type, npos> 3619 (data(), size(), __str.data(), __pos, __str.size()); 3620} 3621 3622template<class _CharT, class _Traits, class _Allocator> 3623template <class _Tp> 3624_EnableIf 3625< 3626 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3627 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3628> 3629basic_string<_CharT, _Traits, _Allocator>::find_last_of(const _Tp& __t, 3630 size_type __pos) const 3631{ 3632 __self_view __sv = __t; 3633 return __str_find_last_of<value_type, size_type, traits_type, npos> 3634 (data(), size(), __sv.data(), __pos, __sv.size()); 3635} 3636 3637template<class _CharT, class _Traits, class _Allocator> 3638inline 3639typename basic_string<_CharT, _Traits, _Allocator>::size_type 3640basic_string<_CharT, _Traits, _Allocator>::find_last_of(const value_type* __s, 3641 size_type __pos) const _NOEXCEPT 3642{ 3643 _LIBCPP_ASSERT(__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, traits_type::length(__s)); 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(value_type __c, 3652 size_type __pos) const _NOEXCEPT 3653{ 3654 return rfind(__c, __pos); 3655} 3656 3657// find_first_not_of 3658 3659template<class _CharT, class _Traits, class _Allocator> 3660typename basic_string<_CharT, _Traits, _Allocator>::size_type 3661basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3662 size_type __pos, 3663 size_type __n) const _NOEXCEPT 3664{ 3665 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_first_not_of(): received nullptr"); 3666 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3667 (data(), size(), __s, __pos, __n); 3668} 3669 3670template<class _CharT, class _Traits, class _Allocator> 3671inline 3672typename basic_string<_CharT, _Traits, _Allocator>::size_type 3673basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const basic_string& __str, 3674 size_type __pos) const _NOEXCEPT 3675{ 3676 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3677 (data(), size(), __str.data(), __pos, __str.size()); 3678} 3679 3680template<class _CharT, class _Traits, class _Allocator> 3681template <class _Tp> 3682_EnableIf 3683< 3684 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3685 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3686> 3687basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const _Tp& __t, 3688 size_type __pos) const 3689{ 3690 __self_view __sv = __t; 3691 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3692 (data(), size(), __sv.data(), __pos, __sv.size()); 3693} 3694 3695template<class _CharT, class _Traits, class _Allocator> 3696inline 3697typename basic_string<_CharT, _Traits, _Allocator>::size_type 3698basic_string<_CharT, _Traits, _Allocator>::find_first_not_of(const value_type* __s, 3699 size_type __pos) const _NOEXCEPT 3700{ 3701 _LIBCPP_ASSERT(__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, traits_type::length(__s)); 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(value_type __c, 3710 size_type __pos) const _NOEXCEPT 3711{ 3712 return __str_find_first_not_of<value_type, size_type, traits_type, npos> 3713 (data(), size(), __c, __pos); 3714} 3715 3716// find_last_not_of 3717 3718template<class _CharT, class _Traits, class _Allocator> 3719typename basic_string<_CharT, _Traits, _Allocator>::size_type 3720basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3721 size_type __pos, 3722 size_type __n) const _NOEXCEPT 3723{ 3724 _LIBCPP_ASSERT(__n == 0 || __s != nullptr, "string::find_last_not_of(): received nullptr"); 3725 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3726 (data(), size(), __s, __pos, __n); 3727} 3728 3729template<class _CharT, class _Traits, class _Allocator> 3730inline 3731typename basic_string<_CharT, _Traits, _Allocator>::size_type 3732basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const basic_string& __str, 3733 size_type __pos) const _NOEXCEPT 3734{ 3735 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3736 (data(), size(), __str.data(), __pos, __str.size()); 3737} 3738 3739template<class _CharT, class _Traits, class _Allocator> 3740template <class _Tp> 3741_EnableIf 3742< 3743 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3744 typename basic_string<_CharT, _Traits, _Allocator>::size_type 3745> 3746basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const _Tp& __t, 3747 size_type __pos) const 3748{ 3749 __self_view __sv = __t; 3750 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3751 (data(), size(), __sv.data(), __pos, __sv.size()); 3752} 3753 3754template<class _CharT, class _Traits, class _Allocator> 3755inline 3756typename basic_string<_CharT, _Traits, _Allocator>::size_type 3757basic_string<_CharT, _Traits, _Allocator>::find_last_not_of(const value_type* __s, 3758 size_type __pos) const _NOEXCEPT 3759{ 3760 _LIBCPP_ASSERT(__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, traits_type::length(__s)); 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(value_type __c, 3769 size_type __pos) const _NOEXCEPT 3770{ 3771 return __str_find_last_not_of<value_type, size_type, traits_type, npos> 3772 (data(), size(), __c, __pos); 3773} 3774 3775// compare 3776 3777template <class _CharT, class _Traits, class _Allocator> 3778template <class _Tp> 3779_EnableIf 3780< 3781 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3782 int 3783> 3784basic_string<_CharT, _Traits, _Allocator>::compare(const _Tp& __t) const 3785{ 3786 __self_view __sv = __t; 3787 size_t __lhs_sz = size(); 3788 size_t __rhs_sz = __sv.size(); 3789 int __result = traits_type::compare(data(), __sv.data(), 3790 _VSTD::min(__lhs_sz, __rhs_sz)); 3791 if (__result != 0) 3792 return __result; 3793 if (__lhs_sz < __rhs_sz) 3794 return -1; 3795 if (__lhs_sz > __rhs_sz) 3796 return 1; 3797 return 0; 3798} 3799 3800template <class _CharT, class _Traits, class _Allocator> 3801inline 3802int 3803basic_string<_CharT, _Traits, _Allocator>::compare(const basic_string& __str) const _NOEXCEPT 3804{ 3805 return compare(__self_view(__str)); 3806} 3807 3808template <class _CharT, class _Traits, class _Allocator> 3809int 3810basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3811 size_type __n1, 3812 const value_type* __s, 3813 size_type __n2) const 3814{ 3815 _LIBCPP_ASSERT(__n2 == 0 || __s != nullptr, "string::compare(): received nullptr"); 3816 size_type __sz = size(); 3817 if (__pos1 > __sz || __n2 == npos) 3818 this->__throw_out_of_range(); 3819 size_type __rlen = _VSTD::min(__n1, __sz - __pos1); 3820 int __r = traits_type::compare(data() + __pos1, __s, _VSTD::min(__rlen, __n2)); 3821 if (__r == 0) 3822 { 3823 if (__rlen < __n2) 3824 __r = -1; 3825 else if (__rlen > __n2) 3826 __r = 1; 3827 } 3828 return __r; 3829} 3830 3831template <class _CharT, class _Traits, class _Allocator> 3832template <class _Tp> 3833_EnableIf 3834< 3835 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value, 3836 int 3837> 3838basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3839 size_type __n1, 3840 const _Tp& __t) const 3841{ 3842 __self_view __sv = __t; 3843 return compare(__pos1, __n1, __sv.data(), __sv.size()); 3844} 3845 3846template <class _CharT, class _Traits, class _Allocator> 3847inline 3848int 3849basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3850 size_type __n1, 3851 const basic_string& __str) const 3852{ 3853 return compare(__pos1, __n1, __str.data(), __str.size()); 3854} 3855 3856template <class _CharT, class _Traits, class _Allocator> 3857template <class _Tp> 3858_EnableIf 3859< 3860 __can_be_converted_to_string_view<_CharT, _Traits, _Tp>::value 3861 && !__is_same_uncvref<_Tp, basic_string<_CharT, _Traits, _Allocator> >::value, 3862 int 3863> 3864basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3865 size_type __n1, 3866 const _Tp& __t, 3867 size_type __pos2, 3868 size_type __n2) const 3869{ 3870 __self_view __sv = __t; 3871 return __self_view(*this).substr(__pos1, __n1).compare(__sv.substr(__pos2, __n2)); 3872} 3873 3874template <class _CharT, class _Traits, class _Allocator> 3875int 3876basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3877 size_type __n1, 3878 const basic_string& __str, 3879 size_type __pos2, 3880 size_type __n2) const 3881{ 3882 return compare(__pos1, __n1, __self_view(__str), __pos2, __n2); 3883} 3884 3885template <class _CharT, class _Traits, class _Allocator> 3886int 3887basic_string<_CharT, _Traits, _Allocator>::compare(const value_type* __s) const _NOEXCEPT 3888{ 3889 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3890 return compare(0, npos, __s, traits_type::length(__s)); 3891} 3892 3893template <class _CharT, class _Traits, class _Allocator> 3894int 3895basic_string<_CharT, _Traits, _Allocator>::compare(size_type __pos1, 3896 size_type __n1, 3897 const value_type* __s) const 3898{ 3899 _LIBCPP_ASSERT(__s != nullptr, "string::compare(): received nullptr"); 3900 return compare(__pos1, __n1, __s, traits_type::length(__s)); 3901} 3902 3903// __invariants 3904 3905template<class _CharT, class _Traits, class _Allocator> 3906inline 3907bool 3908basic_string<_CharT, _Traits, _Allocator>::__invariants() const 3909{ 3910 if (size() > capacity()) 3911 return false; 3912 if (capacity() < __min_cap - 1) 3913 return false; 3914 if (data() == 0) 3915 return false; 3916 if (data()[size()] != value_type(0)) 3917 return false; 3918 return true; 3919} 3920 3921// __clear_and_shrink 3922 3923template<class _CharT, class _Traits, class _Allocator> 3924inline 3925void 3926basic_string<_CharT, _Traits, _Allocator>::__clear_and_shrink() _NOEXCEPT 3927{ 3928 clear(); 3929 if(__is_long()) 3930 { 3931 __alloc_traits::deallocate(__alloc(), __get_long_pointer(), capacity() + 1); 3932 __set_long_cap(0); 3933 __set_short_size(0); 3934 } 3935} 3936 3937// operator== 3938 3939template<class _CharT, class _Traits, class _Allocator> 3940inline _LIBCPP_INLINE_VISIBILITY 3941bool 3942operator==(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 3943 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3944{ 3945 size_t __lhs_sz = __lhs.size(); 3946 return __lhs_sz == __rhs.size() && _Traits::compare(__lhs.data(), 3947 __rhs.data(), 3948 __lhs_sz) == 0; 3949} 3950 3951template<class _Allocator> 3952inline _LIBCPP_INLINE_VISIBILITY 3953bool 3954operator==(const basic_string<char, char_traits<char>, _Allocator>& __lhs, 3955 const basic_string<char, char_traits<char>, _Allocator>& __rhs) _NOEXCEPT 3956{ 3957 size_t __lhs_sz = __lhs.size(); 3958 if (__lhs_sz != __rhs.size()) 3959 return false; 3960 const char* __lp = __lhs.data(); 3961 const char* __rp = __rhs.data(); 3962 if (__lhs.__is_long()) 3963 return char_traits<char>::compare(__lp, __rp, __lhs_sz) == 0; 3964 for (; __lhs_sz != 0; --__lhs_sz, ++__lp, ++__rp) 3965 if (*__lp != *__rp) 3966 return false; 3967 return true; 3968} 3969 3970template<class _CharT, class _Traits, class _Allocator> 3971inline _LIBCPP_INLINE_VISIBILITY 3972bool 3973operator==(const _CharT* __lhs, 3974 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 3975{ 3976 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3977 _LIBCPP_ASSERT(__lhs != nullptr, "operator==(char*, basic_string): received nullptr"); 3978 size_t __lhs_len = _Traits::length(__lhs); 3979 if (__lhs_len != __rhs.size()) return false; 3980 return __rhs.compare(0, _String::npos, __lhs, __lhs_len) == 0; 3981} 3982 3983template<class _CharT, class _Traits, class _Allocator> 3984inline _LIBCPP_INLINE_VISIBILITY 3985bool 3986operator==(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 3987 const _CharT* __rhs) _NOEXCEPT 3988{ 3989 typedef basic_string<_CharT, _Traits, _Allocator> _String; 3990 _LIBCPP_ASSERT(__rhs != nullptr, "operator==(basic_string, char*): received nullptr"); 3991 size_t __rhs_len = _Traits::length(__rhs); 3992 if (__rhs_len != __lhs.size()) return false; 3993 return __lhs.compare(0, _String::npos, __rhs, __rhs_len) == 0; 3994} 3995 3996template<class _CharT, class _Traits, class _Allocator> 3997inline _LIBCPP_INLINE_VISIBILITY 3998bool 3999operator!=(const basic_string<_CharT,_Traits,_Allocator>& __lhs, 4000 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4001{ 4002 return !(__lhs == __rhs); 4003} 4004 4005template<class _CharT, class _Traits, class _Allocator> 4006inline _LIBCPP_INLINE_VISIBILITY 4007bool 4008operator!=(const _CharT* __lhs, 4009 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4010{ 4011 return !(__lhs == __rhs); 4012} 4013 4014template<class _CharT, class _Traits, class _Allocator> 4015inline _LIBCPP_INLINE_VISIBILITY 4016bool 4017operator!=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4018 const _CharT* __rhs) _NOEXCEPT 4019{ 4020 return !(__lhs == __rhs); 4021} 4022 4023// operator< 4024 4025template<class _CharT, class _Traits, class _Allocator> 4026inline _LIBCPP_INLINE_VISIBILITY 4027bool 4028operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4029 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4030{ 4031 return __lhs.compare(__rhs) < 0; 4032} 4033 4034template<class _CharT, class _Traits, class _Allocator> 4035inline _LIBCPP_INLINE_VISIBILITY 4036bool 4037operator< (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4038 const _CharT* __rhs) _NOEXCEPT 4039{ 4040 return __lhs.compare(__rhs) < 0; 4041} 4042 4043template<class _CharT, class _Traits, class _Allocator> 4044inline _LIBCPP_INLINE_VISIBILITY 4045bool 4046operator< (const _CharT* __lhs, 4047 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4048{ 4049 return __rhs.compare(__lhs) > 0; 4050} 4051 4052// operator> 4053 4054template<class _CharT, class _Traits, class _Allocator> 4055inline _LIBCPP_INLINE_VISIBILITY 4056bool 4057operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4058 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4059{ 4060 return __rhs < __lhs; 4061} 4062 4063template<class _CharT, class _Traits, class _Allocator> 4064inline _LIBCPP_INLINE_VISIBILITY 4065bool 4066operator> (const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4067 const _CharT* __rhs) _NOEXCEPT 4068{ 4069 return __rhs < __lhs; 4070} 4071 4072template<class _CharT, class _Traits, class _Allocator> 4073inline _LIBCPP_INLINE_VISIBILITY 4074bool 4075operator> (const _CharT* __lhs, 4076 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4077{ 4078 return __rhs < __lhs; 4079} 4080 4081// operator<= 4082 4083template<class _CharT, class _Traits, class _Allocator> 4084inline _LIBCPP_INLINE_VISIBILITY 4085bool 4086operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4087 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4088{ 4089 return !(__rhs < __lhs); 4090} 4091 4092template<class _CharT, class _Traits, class _Allocator> 4093inline _LIBCPP_INLINE_VISIBILITY 4094bool 4095operator<=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4096 const _CharT* __rhs) _NOEXCEPT 4097{ 4098 return !(__rhs < __lhs); 4099} 4100 4101template<class _CharT, class _Traits, class _Allocator> 4102inline _LIBCPP_INLINE_VISIBILITY 4103bool 4104operator<=(const _CharT* __lhs, 4105 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4106{ 4107 return !(__rhs < __lhs); 4108} 4109 4110// operator>= 4111 4112template<class _CharT, class _Traits, class _Allocator> 4113inline _LIBCPP_INLINE_VISIBILITY 4114bool 4115operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4116 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4117{ 4118 return !(__lhs < __rhs); 4119} 4120 4121template<class _CharT, class _Traits, class _Allocator> 4122inline _LIBCPP_INLINE_VISIBILITY 4123bool 4124operator>=(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4125 const _CharT* __rhs) _NOEXCEPT 4126{ 4127 return !(__lhs < __rhs); 4128} 4129 4130template<class _CharT, class _Traits, class _Allocator> 4131inline _LIBCPP_INLINE_VISIBILITY 4132bool 4133operator>=(const _CharT* __lhs, 4134 const basic_string<_CharT, _Traits, _Allocator>& __rhs) _NOEXCEPT 4135{ 4136 return !(__lhs < __rhs); 4137} 4138 4139// operator + 4140 4141template<class _CharT, class _Traits, class _Allocator> 4142basic_string<_CharT, _Traits, _Allocator> 4143operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, 4144 const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4145{ 4146 basic_string<_CharT, _Traits, _Allocator> __r(__lhs.get_allocator()); 4147 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = __lhs.size(); 4148 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = __rhs.size(); 4149 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + __rhs_sz); 4150 __r.append(__rhs.data(), __rhs_sz); 4151 return __r; 4152} 4153 4154template<class _CharT, class _Traits, class _Allocator> 4155basic_string<_CharT, _Traits, _Allocator> 4156operator+(const _CharT* __lhs , const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4157{ 4158 basic_string<_CharT, _Traits, _Allocator> __r(__rhs.get_allocator()); 4159 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = _Traits::length(__lhs); 4160 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = __rhs.size(); 4161 __r.__init(__lhs, __lhs_sz, __lhs_sz + __rhs_sz); 4162 __r.append(__rhs.data(), __rhs_sz); 4163 return __r; 4164} 4165 4166template<class _CharT, class _Traits, class _Allocator> 4167basic_string<_CharT, _Traits, _Allocator> 4168operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Allocator>& __rhs) 4169{ 4170 basic_string<_CharT, _Traits, _Allocator> __r(__rhs.get_allocator()); 4171 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = __rhs.size(); 4172 __r.__init(&__lhs, 1, 1 + __rhs_sz); 4173 __r.append(__rhs.data(), __rhs_sz); 4174 return __r; 4175} 4176 4177template<class _CharT, class _Traits, class _Allocator> 4178inline 4179basic_string<_CharT, _Traits, _Allocator> 4180operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, const _CharT* __rhs) 4181{ 4182 basic_string<_CharT, _Traits, _Allocator> __r(__lhs.get_allocator()); 4183 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = __lhs.size(); 4184 typename basic_string<_CharT, _Traits, _Allocator>::size_type __rhs_sz = _Traits::length(__rhs); 4185 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + __rhs_sz); 4186 __r.append(__rhs, __rhs_sz); 4187 return __r; 4188} 4189 4190template<class _CharT, class _Traits, class _Allocator> 4191basic_string<_CharT, _Traits, _Allocator> 4192operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, _CharT __rhs) 4193{ 4194 basic_string<_CharT, _Traits, _Allocator> __r(__lhs.get_allocator()); 4195 typename basic_string<_CharT, _Traits, _Allocator>::size_type __lhs_sz = __lhs.size(); 4196 __r.__init(__lhs.data(), __lhs_sz, __lhs_sz + 1); 4197 __r.push_back(__rhs); 4198 return __r; 4199} 4200 4201#ifndef _LIBCPP_CXX03_LANG 4202 4203template<class _CharT, class _Traits, class _Allocator> 4204inline _LIBCPP_INLINE_VISIBILITY 4205basic_string<_CharT, _Traits, _Allocator> 4206operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const basic_string<_CharT, _Traits, _Allocator>& __rhs) 4207{ 4208 return _VSTD::move(__lhs.append(__rhs)); 4209} 4210 4211template<class _CharT, class _Traits, class _Allocator> 4212inline _LIBCPP_INLINE_VISIBILITY 4213basic_string<_CharT, _Traits, _Allocator> 4214operator+(const basic_string<_CharT, _Traits, _Allocator>& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4215{ 4216 return _VSTD::move(__rhs.insert(0, __lhs)); 4217} 4218 4219template<class _CharT, class _Traits, class _Allocator> 4220inline _LIBCPP_INLINE_VISIBILITY 4221basic_string<_CharT, _Traits, _Allocator> 4222operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, basic_string<_CharT, _Traits, _Allocator>&& __rhs) 4223{ 4224 return _VSTD::move(__lhs.append(__rhs)); 4225} 4226 4227template<class _CharT, class _Traits, class _Allocator> 4228inline _LIBCPP_INLINE_VISIBILITY 4229basic_string<_CharT, _Traits, _Allocator> 4230operator+(const _CharT* __lhs , basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4231{ 4232 return _VSTD::move(__rhs.insert(0, __lhs)); 4233} 4234 4235template<class _CharT, class _Traits, class _Allocator> 4236inline _LIBCPP_INLINE_VISIBILITY 4237basic_string<_CharT, _Traits, _Allocator> 4238operator+(_CharT __lhs, basic_string<_CharT,_Traits,_Allocator>&& __rhs) 4239{ 4240 __rhs.insert(__rhs.begin(), __lhs); 4241 return _VSTD::move(__rhs); 4242} 4243 4244template<class _CharT, class _Traits, class _Allocator> 4245inline _LIBCPP_INLINE_VISIBILITY 4246basic_string<_CharT, _Traits, _Allocator> 4247operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, const _CharT* __rhs) 4248{ 4249 return _VSTD::move(__lhs.append(__rhs)); 4250} 4251 4252template<class _CharT, class _Traits, class _Allocator> 4253inline _LIBCPP_INLINE_VISIBILITY 4254basic_string<_CharT, _Traits, _Allocator> 4255operator+(basic_string<_CharT, _Traits, _Allocator>&& __lhs, _CharT __rhs) 4256{ 4257 __lhs.push_back(__rhs); 4258 return _VSTD::move(__lhs); 4259} 4260 4261#endif // _LIBCPP_CXX03_LANG 4262 4263// swap 4264 4265template<class _CharT, class _Traits, class _Allocator> 4266inline _LIBCPP_INLINE_VISIBILITY 4267void 4268swap(basic_string<_CharT, _Traits, _Allocator>& __lhs, 4269 basic_string<_CharT, _Traits, _Allocator>& __rhs) 4270 _NOEXCEPT_(_NOEXCEPT_(__lhs.swap(__rhs))) 4271{ 4272 __lhs.swap(__rhs); 4273} 4274 4275#ifndef _LIBCPP_NO_HAS_CHAR8_T 4276typedef basic_string<char8_t> u8string; 4277#endif 4278 4279#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 4280typedef basic_string<char16_t> u16string; 4281typedef basic_string<char32_t> u32string; 4282#endif // _LIBCPP_HAS_NO_UNICODE_CHARS 4283 4284_LIBCPP_FUNC_VIS int stoi (const string& __str, size_t* __idx = 0, int __base = 10); 4285_LIBCPP_FUNC_VIS long stol (const string& __str, size_t* __idx = 0, int __base = 10); 4286_LIBCPP_FUNC_VIS unsigned long stoul (const string& __str, size_t* __idx = 0, int __base = 10); 4287_LIBCPP_FUNC_VIS long long stoll (const string& __str, size_t* __idx = 0, int __base = 10); 4288_LIBCPP_FUNC_VIS unsigned long long stoull(const string& __str, size_t* __idx = 0, int __base = 10); 4289 4290_LIBCPP_FUNC_VIS float stof (const string& __str, size_t* __idx = 0); 4291_LIBCPP_FUNC_VIS double stod (const string& __str, size_t* __idx = 0); 4292_LIBCPP_FUNC_VIS long double stold(const string& __str, size_t* __idx = 0); 4293 4294_LIBCPP_FUNC_VIS string to_string(int __val); 4295_LIBCPP_FUNC_VIS string to_string(unsigned __val); 4296_LIBCPP_FUNC_VIS string to_string(long __val); 4297_LIBCPP_FUNC_VIS string to_string(unsigned long __val); 4298_LIBCPP_FUNC_VIS string to_string(long long __val); 4299_LIBCPP_FUNC_VIS string to_string(unsigned long long __val); 4300_LIBCPP_FUNC_VIS string to_string(float __val); 4301_LIBCPP_FUNC_VIS string to_string(double __val); 4302_LIBCPP_FUNC_VIS string to_string(long double __val); 4303 4304_LIBCPP_FUNC_VIS int stoi (const wstring& __str, size_t* __idx = 0, int __base = 10); 4305_LIBCPP_FUNC_VIS long stol (const wstring& __str, size_t* __idx = 0, int __base = 10); 4306_LIBCPP_FUNC_VIS unsigned long stoul (const wstring& __str, size_t* __idx = 0, int __base = 10); 4307_LIBCPP_FUNC_VIS long long stoll (const wstring& __str, size_t* __idx = 0, int __base = 10); 4308_LIBCPP_FUNC_VIS unsigned long long stoull(const wstring& __str, size_t* __idx = 0, int __base = 10); 4309 4310_LIBCPP_FUNC_VIS float stof (const wstring& __str, size_t* __idx = 0); 4311_LIBCPP_FUNC_VIS double stod (const wstring& __str, size_t* __idx = 0); 4312_LIBCPP_FUNC_VIS long double stold(const wstring& __str, size_t* __idx = 0); 4313 4314_LIBCPP_FUNC_VIS wstring to_wstring(int __val); 4315_LIBCPP_FUNC_VIS wstring to_wstring(unsigned __val); 4316_LIBCPP_FUNC_VIS wstring to_wstring(long __val); 4317_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long __val); 4318_LIBCPP_FUNC_VIS wstring to_wstring(long long __val); 4319_LIBCPP_FUNC_VIS wstring to_wstring(unsigned long long __val); 4320_LIBCPP_FUNC_VIS wstring to_wstring(float __val); 4321_LIBCPP_FUNC_VIS wstring to_wstring(double __val); 4322_LIBCPP_FUNC_VIS wstring to_wstring(long double __val); 4323 4324template<class _CharT, class _Traits, class _Allocator> 4325_LIBCPP_FUNC_VIS 4326const typename basic_string<_CharT, _Traits, _Allocator>::size_type 4327 basic_string<_CharT, _Traits, _Allocator>::npos; 4328 4329template <class _CharT, class _Allocator> 4330struct _LIBCPP_TEMPLATE_VIS 4331 hash<basic_string<_CharT, char_traits<_CharT>, _Allocator> > 4332 : public unary_function< 4333 basic_string<_CharT, char_traits<_CharT>, _Allocator>, size_t> 4334{ 4335 size_t 4336 operator()(const basic_string<_CharT, char_traits<_CharT>, _Allocator>& __val) const _NOEXCEPT 4337 { return __do_string_hash(__val.data(), __val.data() + __val.size()); } 4338}; 4339 4340 4341template<class _CharT, class _Traits, class _Allocator> 4342basic_ostream<_CharT, _Traits>& 4343operator<<(basic_ostream<_CharT, _Traits>& __os, 4344 const basic_string<_CharT, _Traits, _Allocator>& __str); 4345 4346template<class _CharT, class _Traits, class _Allocator> 4347basic_istream<_CharT, _Traits>& 4348operator>>(basic_istream<_CharT, _Traits>& __is, 4349 basic_string<_CharT, _Traits, _Allocator>& __str); 4350 4351template<class _CharT, class _Traits, class _Allocator> 4352basic_istream<_CharT, _Traits>& 4353getline(basic_istream<_CharT, _Traits>& __is, 4354 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4355 4356template<class _CharT, class _Traits, class _Allocator> 4357inline _LIBCPP_INLINE_VISIBILITY 4358basic_istream<_CharT, _Traits>& 4359getline(basic_istream<_CharT, _Traits>& __is, 4360 basic_string<_CharT, _Traits, _Allocator>& __str); 4361 4362#ifndef _LIBCPP_CXX03_LANG 4363 4364template<class _CharT, class _Traits, class _Allocator> 4365inline _LIBCPP_INLINE_VISIBILITY 4366basic_istream<_CharT, _Traits>& 4367getline(basic_istream<_CharT, _Traits>&& __is, 4368 basic_string<_CharT, _Traits, _Allocator>& __str, _CharT __dlm); 4369 4370template<class _CharT, class _Traits, class _Allocator> 4371inline _LIBCPP_INLINE_VISIBILITY 4372basic_istream<_CharT, _Traits>& 4373getline(basic_istream<_CharT, _Traits>&& __is, 4374 basic_string<_CharT, _Traits, _Allocator>& __str); 4375 4376#endif // _LIBCPP_CXX03_LANG 4377 4378#if _LIBCPP_STD_VER > 17 4379template <class _CharT, class _Traits, class _Allocator, class _Up> 4380inline _LIBCPP_INLINE_VISIBILITY 4381 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4382 erase(basic_string<_CharT, _Traits, _Allocator>& __str, const _Up& __v) { 4383 auto __old_size = __str.size(); 4384 __str.erase(_VSTD::remove(__str.begin(), __str.end(), __v), __str.end()); 4385 return __old_size - __str.size(); 4386} 4387 4388template <class _CharT, class _Traits, class _Allocator, class _Predicate> 4389inline _LIBCPP_INLINE_VISIBILITY 4390 typename basic_string<_CharT, _Traits, _Allocator>::size_type 4391 erase_if(basic_string<_CharT, _Traits, _Allocator>& __str, 4392 _Predicate __pred) { 4393 auto __old_size = __str.size(); 4394 __str.erase(_VSTD::remove_if(__str.begin(), __str.end(), __pred), 4395 __str.end()); 4396 return __old_size - __str.size(); 4397} 4398#endif 4399 4400#if _LIBCPP_DEBUG_LEVEL >= 2 4401 4402template<class _CharT, class _Traits, class _Allocator> 4403bool 4404basic_string<_CharT, _Traits, _Allocator>::__dereferenceable(const const_iterator* __i) const 4405{ 4406 return this->data() <= _VSTD::__to_address(__i->base()) && 4407 _VSTD::__to_address(__i->base()) < this->data() + this->size(); 4408} 4409 4410template<class _CharT, class _Traits, class _Allocator> 4411bool 4412basic_string<_CharT, _Traits, _Allocator>::__decrementable(const const_iterator* __i) const 4413{ 4414 return this->data() < _VSTD::__to_address(__i->base()) && 4415 _VSTD::__to_address(__i->base()) <= this->data() + this->size(); 4416} 4417 4418template<class _CharT, class _Traits, class _Allocator> 4419bool 4420basic_string<_CharT, _Traits, _Allocator>::__addable(const const_iterator* __i, ptrdiff_t __n) const 4421{ 4422 const value_type* __p = _VSTD::__to_address(__i->base()) + __n; 4423 return this->data() <= __p && __p <= this->data() + this->size(); 4424} 4425 4426template<class _CharT, class _Traits, class _Allocator> 4427bool 4428basic_string<_CharT, _Traits, _Allocator>::__subscriptable(const const_iterator* __i, ptrdiff_t __n) const 4429{ 4430 const value_type* __p = _VSTD::__to_address(__i->base()) + __n; 4431 return this->data() <= __p && __p < this->data() + this->size(); 4432} 4433 4434#endif // _LIBCPP_DEBUG_LEVEL >= 2 4435 4436#if _LIBCPP_STD_VER > 11 4437// Literal suffixes for basic_string [basic.string.literals] 4438inline namespace literals 4439{ 4440 inline namespace string_literals 4441 { 4442 inline _LIBCPP_INLINE_VISIBILITY 4443 basic_string<char> operator "" s( const char *__str, size_t __len ) 4444 { 4445 return basic_string<char> (__str, __len); 4446 } 4447 4448 inline _LIBCPP_INLINE_VISIBILITY 4449 basic_string<wchar_t> operator "" s( const wchar_t *__str, size_t __len ) 4450 { 4451 return basic_string<wchar_t> (__str, __len); 4452 } 4453 4454#ifndef _LIBCPP_NO_HAS_CHAR8_T 4455 inline _LIBCPP_INLINE_VISIBILITY 4456 basic_string<char8_t> operator "" s(const char8_t *__str, size_t __len) _NOEXCEPT 4457 { 4458 return basic_string<char8_t> (__str, __len); 4459 } 4460#endif 4461 4462 inline _LIBCPP_INLINE_VISIBILITY 4463 basic_string<char16_t> operator "" s( const char16_t *__str, size_t __len ) 4464 { 4465 return basic_string<char16_t> (__str, __len); 4466 } 4467 4468 inline _LIBCPP_INLINE_VISIBILITY 4469 basic_string<char32_t> operator "" s( const char32_t *__str, size_t __len ) 4470 { 4471 return basic_string<char32_t> (__str, __len); 4472 } 4473 } 4474} 4475#endif 4476 4477_LIBCPP_END_NAMESPACE_STD 4478 4479_LIBCPP_POP_MACROS 4480 4481#endif // _LIBCPP_STRING 4482