1 // -*- C++ -*- 2 //===-------------------------- iterator ----------------------------------===// 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_ITERATOR 11 #define _LIBCPP_ITERATOR 12 13 /* 14 iterator synopsis 15 16 #include <concepts> 17 18 namespace std 19 { 20 template<class> struct incrementable_traits; // since C++20 21 template<class T> 22 using iter_difference_t = see below; // since C++20 23 24 template<class> struct indirectly_readable_traits; // since C++20 25 template<class T> 26 using iter_value_t = see below; // since C++20 27 28 template<class Iterator> 29 struct iterator_traits; 30 31 template<class T> 32 requires is_object_v<T> // since C++20 33 struct iterator_traits<T*>; 34 35 template<dereferenceable T> 36 using iter_reference_t = decltype(*declval<T&>()); 37 38 namespace ranges::inline unspecified { 39 inline constexpr unspecified iter_move = unspecified; // since C++20, nodiscard as an extension 40 }} 41 42 template<dereferenceable T> 43 requires ... 44 using iter_rvalue_reference_t = decltype(ranges::iter_move(declval<T&>())); // since C++20 45 46 // [iterator.concepts], iterator concepts 47 // [iterator.concept.readable], concept indirectly_readable 48 template<class In> 49 concept indirectly_readable = see below; // since C++20 50 51 // [iterator.concept.writable], concept indirectly_writable 52 template<class Out, class T> 53 concept indirectly_writable = see below; // since C++20 54 55 // [iterator.concept.winc], concept weakly_incrementable 56 template<class I> 57 concept weakly_incrementable = see below; // since C++20 58 59 // [iterator.concept.inc], concept incrementable 60 template<class I> 61 concept incrementable = see below; // since C++20 62 63 // [iterator.concept.iterator], concept input_or_output_iterator 64 template<class I> 65 concept input_or_output_iterator = see below; // since C++20 66 67 // [iterator.concept.sentinel], concept sentinel_for 68 template<class S, class I> 69 concept sentinel_for = see below; // since C++20 70 71 // [iterator.concept.sizedsentinel], concept sized_sentinel_for 72 template<class S, class I> 73 inline constexpr bool disable_sized_sentinel_for = false; 74 75 template<class S, class I> 76 concept sized_sentinel_for = see below; 77 78 // [iterator.concept.input], concept input_iterator 79 template<class I> 80 concept input_iterator = see below; // since C++20 81 82 // [iterator.concept.forward], concept forward_iterator 83 template<class I> 84 concept forward_iterator = see below; // since C++20 85 86 // [iterator.concept.bidir], concept bidirectional_iterator 87 template<class I> 88 concept bidirectional_iterator = see below; // since C++20 89 90 // [iterator.concept.random.access], concept random_access_iterator 91 template<class I> 92 concept random_access_iterator = see below; // since C++20 93 94 template<class Category, class T, class Distance = ptrdiff_t, 95 class Pointer = T*, class Reference = T&> 96 struct iterator 97 { 98 typedef T value_type; 99 typedef Distance difference_type; 100 typedef Pointer pointer; 101 typedef Reference reference; 102 typedef Category iterator_category; 103 }; 104 105 struct input_iterator_tag {}; 106 struct output_iterator_tag {}; 107 struct forward_iterator_tag : public input_iterator_tag {}; 108 struct bidirectional_iterator_tag : public forward_iterator_tag {}; 109 struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 110 111 // 27.4.3, iterator operations 112 template <class InputIterator, class Distance> // constexpr in C++17 113 constexpr void advance(InputIterator& i, Distance n); 114 115 template <class InputIterator> // constexpr in C++17 116 constexpr typename iterator_traits<InputIterator>::difference_type 117 distance(InputIterator first, InputIterator last); 118 119 template <class InputIterator> // constexpr in C++17 120 constexpr InputIterator next(InputIterator x, 121 typename iterator_traits<InputIterator>::difference_type n = 1); 122 123 template <class BidirectionalIterator> // constexpr in C++17 124 constexpr BidirectionalIterator prev(BidirectionalIterator x, 125 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 126 127 template <class Iterator> 128 class reverse_iterator 129 : public iterator<typename iterator_traits<Iterator>::iterator_category, 130 typename iterator_traits<Iterator>::value_type, 131 typename iterator_traits<Iterator>::difference_type, 132 typename iterator_traits<Iterator>::pointer, 133 typename iterator_traits<Iterator>::reference> 134 { 135 protected: 136 Iterator current; 137 public: 138 typedef Iterator iterator_type; 139 typedef typename iterator_traits<Iterator>::difference_type difference_type; 140 typedef typename iterator_traits<Iterator>::reference reference; 141 typedef typename iterator_traits<Iterator>::pointer pointer; 142 143 constexpr reverse_iterator(); 144 constexpr explicit reverse_iterator(Iterator x); 145 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 146 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 147 constexpr Iterator base() const; 148 constexpr reference operator*() const; 149 constexpr pointer operator->() const; 150 constexpr reverse_iterator& operator++(); 151 constexpr reverse_iterator operator++(int); 152 constexpr reverse_iterator& operator--(); 153 constexpr reverse_iterator operator--(int); 154 constexpr reverse_iterator operator+ (difference_type n) const; 155 constexpr reverse_iterator& operator+=(difference_type n); 156 constexpr reverse_iterator operator- (difference_type n) const; 157 constexpr reverse_iterator& operator-=(difference_type n); 158 constexpr reference operator[](difference_type n) const; 159 }; 160 161 template <class Iterator1, class Iterator2> 162 constexpr bool // constexpr in C++17 163 operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 164 165 template <class Iterator1, class Iterator2> 166 constexpr bool // constexpr in C++17 167 operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 168 169 template <class Iterator1, class Iterator2> 170 constexpr bool // constexpr in C++17 171 operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 172 173 template <class Iterator1, class Iterator2> 174 constexpr bool // constexpr in C++17 175 operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 176 177 template <class Iterator1, class Iterator2> 178 constexpr bool // constexpr in C++17 179 operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 180 181 template <class Iterator1, class Iterator2> 182 constexpr bool // constexpr in C++17 183 operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 184 185 template <class Iterator1, class Iterator2> 186 constexpr auto 187 operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 188 -> decltype(__y.base() - __x.base()); // constexpr in C++17 189 190 template <class Iterator> 191 constexpr reverse_iterator<Iterator> 192 operator+(typename reverse_iterator<Iterator>::difference_type n, 193 const reverse_iterator<Iterator>& x); // constexpr in C++17 194 195 template <class Iterator> 196 constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 197 198 template <class Container> 199 class back_insert_iterator 200 { 201 protected: 202 Container* container; 203 public: 204 typedef Container container_type; 205 typedef void value_type; 206 typedef void difference_type; 207 typedef void reference; 208 typedef void pointer; 209 210 explicit back_insert_iterator(Container& x); // constexpr in C++20 211 back_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 212 back_insert_iterator& operator*(); // constexpr in C++20 213 back_insert_iterator& operator++(); // constexpr in C++20 214 back_insert_iterator operator++(int); // constexpr in C++20 215 }; 216 217 template <class Container> back_insert_iterator<Container> back_inserter(Container& x); // constexpr in C++20 218 219 template <class Container> 220 class front_insert_iterator 221 { 222 protected: 223 Container* container; 224 public: 225 typedef Container container_type; 226 typedef void value_type; 227 typedef void difference_type; 228 typedef void reference; 229 typedef void pointer; 230 231 explicit front_insert_iterator(Container& x); // constexpr in C++20 232 front_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 233 front_insert_iterator& operator*(); // constexpr in C++20 234 front_insert_iterator& operator++(); // constexpr in C++20 235 front_insert_iterator operator++(int); // constexpr in C++20 236 }; 237 238 template <class Container> front_insert_iterator<Container> front_inserter(Container& x); // constexpr in C++20 239 240 template <class Container> 241 class insert_iterator 242 { 243 protected: 244 Container* container; 245 typename Container::iterator iter; 246 public: 247 typedef Container container_type; 248 typedef void value_type; 249 typedef void difference_type; 250 typedef void reference; 251 typedef void pointer; 252 253 insert_iterator(Container& x, typename Container::iterator i); // constexpr in C++20 254 insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 255 insert_iterator& operator*(); // constexpr in C++20 256 insert_iterator& operator++(); // constexpr in C++20 257 insert_iterator& operator++(int); // constexpr in C++20 258 }; 259 260 template <class Container, class Iterator> 261 insert_iterator<Container> inserter(Container& x, Iterator i); // constexpr in C++20 262 263 template <class Iterator> 264 class move_iterator { 265 public: 266 typedef Iterator iterator_type; 267 typedef typename iterator_traits<Iterator>::difference_type difference_type; 268 typedef Iterator pointer; 269 typedef typename iterator_traits<Iterator>::value_type value_type; 270 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 271 typedef value_type&& reference; 272 273 constexpr move_iterator(); // all the constexprs are in C++17 274 constexpr explicit move_iterator(Iterator i); 275 template <class U> 276 constexpr move_iterator(const move_iterator<U>& u); 277 template <class U> 278 constexpr move_iterator& operator=(const move_iterator<U>& u); 279 constexpr iterator_type base() const; 280 constexpr reference operator*() const; 281 constexpr pointer operator->() const; 282 constexpr move_iterator& operator++(); 283 constexpr move_iterator operator++(int); 284 constexpr move_iterator& operator--(); 285 constexpr move_iterator operator--(int); 286 constexpr move_iterator operator+(difference_type n) const; 287 constexpr move_iterator& operator+=(difference_type n); 288 constexpr move_iterator operator-(difference_type n) const; 289 constexpr move_iterator& operator-=(difference_type n); 290 constexpr unspecified operator[](difference_type n) const; 291 private: 292 Iterator current; // exposition only 293 }; 294 295 template <class Iterator1, class Iterator2> 296 constexpr bool // constexpr in C++17 297 operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 298 299 template <class Iterator1, class Iterator2> 300 constexpr bool // constexpr in C++17 301 operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 302 303 template <class Iterator1, class Iterator2> 304 constexpr bool // constexpr in C++17 305 operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 306 307 template <class Iterator1, class Iterator2> 308 constexpr bool // constexpr in C++17 309 operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 310 311 template <class Iterator1, class Iterator2> 312 constexpr bool // constexpr in C++17 313 operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 314 315 template <class Iterator1, class Iterator2> 316 constexpr bool // constexpr in C++17 317 operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 318 319 template <class Iterator1, class Iterator2> 320 constexpr auto // constexpr in C++17 321 operator-(const move_iterator<Iterator1>& x, 322 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 323 324 template <class Iterator> 325 constexpr move_iterator<Iterator> operator+( // constexpr in C++17 326 typename move_iterator<Iterator>::difference_type n, 327 const move_iterator<Iterator>& x); 328 329 template <class Iterator> // constexpr in C++17 330 constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 331 332 333 template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 334 class istream_iterator 335 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 336 { 337 public: 338 typedef charT char_type; 339 typedef traits traits_type; 340 typedef basic_istream<charT,traits> istream_type; 341 342 constexpr istream_iterator(); 343 istream_iterator(istream_type& s); 344 istream_iterator(const istream_iterator& x); 345 ~istream_iterator(); 346 347 const T& operator*() const; 348 const T* operator->() const; 349 istream_iterator& operator++(); 350 istream_iterator operator++(int); 351 }; 352 353 template <class T, class charT, class traits, class Distance> 354 bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 355 const istream_iterator<T,charT,traits,Distance>& y); 356 template <class T, class charT, class traits, class Distance> 357 bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 358 const istream_iterator<T,charT,traits,Distance>& y); 359 360 template <class T, class charT = char, class traits = char_traits<charT> > 361 class ostream_iterator 362 : public iterator<output_iterator_tag, void, void, void ,void> 363 { 364 public: 365 typedef charT char_type; 366 typedef traits traits_type; 367 typedef basic_ostream<charT,traits> ostream_type; 368 369 ostream_iterator(ostream_type& s); 370 ostream_iterator(ostream_type& s, const charT* delimiter); 371 ostream_iterator(const ostream_iterator& x); 372 ~ostream_iterator(); 373 ostream_iterator& operator=(const T& value); 374 375 ostream_iterator& operator*(); 376 ostream_iterator& operator++(); 377 ostream_iterator& operator++(int); 378 }; 379 380 template<class charT, class traits = char_traits<charT> > 381 class istreambuf_iterator 382 : public iterator<input_iterator_tag, charT, 383 typename traits::off_type, unspecified, 384 charT> 385 { 386 public: 387 typedef charT char_type; 388 typedef traits traits_type; 389 typedef typename traits::int_type int_type; 390 typedef basic_streambuf<charT,traits> streambuf_type; 391 typedef basic_istream<charT,traits> istream_type; 392 393 istreambuf_iterator() noexcept; 394 istreambuf_iterator(istream_type& s) noexcept; 395 istreambuf_iterator(streambuf_type* s) noexcept; 396 istreambuf_iterator(a-private-type) noexcept; 397 398 charT operator*() const; 399 pointer operator->() const; 400 istreambuf_iterator& operator++(); 401 a-private-type operator++(int); 402 403 bool equal(const istreambuf_iterator& b) const; 404 }; 405 406 template <class charT, class traits> 407 bool operator==(const istreambuf_iterator<charT,traits>& a, 408 const istreambuf_iterator<charT,traits>& b); 409 template <class charT, class traits> 410 bool operator!=(const istreambuf_iterator<charT,traits>& a, 411 const istreambuf_iterator<charT,traits>& b); 412 413 template <class charT, class traits = char_traits<charT> > 414 class ostreambuf_iterator 415 : public iterator<output_iterator_tag, void, void, void, void> 416 { 417 public: 418 typedef charT char_type; 419 typedef traits traits_type; 420 typedef basic_streambuf<charT,traits> streambuf_type; 421 typedef basic_ostream<charT,traits> ostream_type; 422 423 ostreambuf_iterator(ostream_type& s) noexcept; 424 ostreambuf_iterator(streambuf_type* s) noexcept; 425 ostreambuf_iterator& operator=(charT c); 426 ostreambuf_iterator& operator*(); 427 ostreambuf_iterator& operator++(); 428 ostreambuf_iterator& operator++(int); 429 bool failed() const noexcept; 430 }; 431 432 template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 433 template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 434 template <class C> constexpr auto end(C& c) -> decltype(c.end()); 435 template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 436 template <class T, size_t N> constexpr T* begin(T (&array)[N]); 437 template <class T, size_t N> constexpr T* end(T (&array)[N]); 438 439 template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 440 template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 441 template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 442 template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 443 template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 444 template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 445 template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 446 template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 447 template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 448 template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 449 template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 450 template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 451 452 // 24.8, container access: 453 template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 454 template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 455 456 template <class C> constexpr auto ssize(const C& c) 457 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 458 template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 459 460 template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 461 template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 462 template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 463 template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 464 template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 465 template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 466 template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 467 468 } // std 469 470 */ 471 472 #include <__config> 473 #include <__debug> 474 #include <__functional_base> 475 #include <__iterator/concepts.h> 476 #include <__iterator/incrementable_traits.h> 477 #include <__iterator/iter_move.h> 478 #include <__iterator/iterator_traits.h> 479 #include <__iterator/readable_traits.h> 480 #include <__memory/addressof.h> 481 #include <__memory/pointer_traits.h> 482 #include <compare> 483 #include <concepts> // Mandated by the Standard. 484 #include <cstddef> 485 #include <initializer_list> 486 #include <iosfwd> // for forward declarations of vector and string 487 #include <type_traits> 488 #include <version> 489 490 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 491 #pragma GCC system_header 492 #endif 493 494 _LIBCPP_BEGIN_NAMESPACE_STD 495 496 template<class _Category, class _Tp, class _Distance = ptrdiff_t, 497 class _Pointer = _Tp*, class _Reference = _Tp&> 498 struct _LIBCPP_TEMPLATE_VIS iterator 499 { 500 typedef _Tp value_type; 501 typedef _Distance difference_type; 502 typedef _Pointer pointer; 503 typedef _Reference reference; 504 typedef _Category iterator_category; 505 }; 506 507 template <class _InputIter> 508 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 509 void __advance(_InputIter& __i, 510 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 511 { 512 for (; __n > 0; --__n) 513 ++__i; 514 } 515 516 template <class _BiDirIter> 517 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 518 void __advance(_BiDirIter& __i, 519 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 520 { 521 if (__n >= 0) 522 for (; __n > 0; --__n) 523 ++__i; 524 else 525 for (; __n < 0; ++__n) 526 --__i; 527 } 528 529 template <class _RandIter> 530 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 531 void __advance(_RandIter& __i, 532 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 533 { 534 __i += __n; 535 } 536 537 template <class _InputIter, class _Distance> 538 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 539 void advance(_InputIter& __i, _Distance __orig_n) 540 { 541 typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; 542 _IntegralSize __n = __orig_n; 543 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 544 "Attempt to advance(it, n) with negative n on a non-bidirectional iterator"); 545 _VSTD::__advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 546 } 547 548 template <class _InputIter> 549 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 550 typename iterator_traits<_InputIter>::difference_type 551 __distance(_InputIter __first, _InputIter __last, input_iterator_tag) 552 { 553 typename iterator_traits<_InputIter>::difference_type __r(0); 554 for (; __first != __last; ++__first) 555 ++__r; 556 return __r; 557 } 558 559 template <class _RandIter> 560 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 561 typename iterator_traits<_RandIter>::difference_type 562 __distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 563 { 564 return __last - __first; 565 } 566 567 template <class _InputIter> 568 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 569 typename iterator_traits<_InputIter>::difference_type 570 distance(_InputIter __first, _InputIter __last) 571 { 572 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 573 } 574 575 template <class _InputIter> 576 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 577 typename enable_if 578 < 579 __is_cpp17_input_iterator<_InputIter>::value, 580 _InputIter 581 >::type 582 next(_InputIter __x, 583 typename iterator_traits<_InputIter>::difference_type __n = 1) 584 { 585 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 586 "Attempt to next(it, n) with negative n on a non-bidirectional iterator"); 587 588 _VSTD::advance(__x, __n); 589 return __x; 590 } 591 592 template <class _InputIter> 593 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 594 typename enable_if 595 < 596 __is_cpp17_input_iterator<_InputIter>::value, 597 _InputIter 598 >::type 599 prev(_InputIter __x, 600 typename iterator_traits<_InputIter>::difference_type __n = 1) 601 { 602 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 603 "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator"); 604 _VSTD::advance(__x, -__n); 605 return __x; 606 } 607 608 609 template <class _Tp, class = void> 610 struct __is_stashing_iterator : false_type {}; 611 612 template <class _Tp> 613 struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 614 : true_type {}; 615 616 template <class _Iter> 617 class _LIBCPP_TEMPLATE_VIS reverse_iterator 618 : public iterator<typename iterator_traits<_Iter>::iterator_category, 619 typename iterator_traits<_Iter>::value_type, 620 typename iterator_traits<_Iter>::difference_type, 621 typename iterator_traits<_Iter>::pointer, 622 typename iterator_traits<_Iter>::reference> 623 { 624 private: 625 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 626 627 static_assert(!__is_stashing_iterator<_Iter>::value, 628 "The specified iterator type cannot be used with reverse_iterator; " 629 "Using stashing iterators with reverse_iterator causes undefined behavior"); 630 631 protected: 632 _Iter current; 633 public: 634 typedef _Iter iterator_type; 635 typedef typename iterator_traits<_Iter>::difference_type difference_type; 636 typedef typename iterator_traits<_Iter>::reference reference; 637 typedef typename iterator_traits<_Iter>::pointer pointer; 638 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 639 random_access_iterator_tag, 640 typename iterator_traits<_Iter>::iterator_category> iterator_category; 641 #if _LIBCPP_STD_VER > 17 642 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 643 random_access_iterator_tag, 644 bidirectional_iterator_tag> iterator_concept; 645 #endif 646 647 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 648 reverse_iterator() : __t(), current() {} 649 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 650 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 651 template <class _Up> 652 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 653 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 654 template <class _Up> 655 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 656 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 657 { __t = current = __u.base(); return *this; } 658 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 659 _Iter base() const {return current;} 660 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 661 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 662 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 663 pointer operator->() const {return _VSTD::addressof(operator*());} 664 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 665 reverse_iterator& operator++() {--current; return *this;} 666 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 667 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 668 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 669 reverse_iterator& operator--() {++current; return *this;} 670 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 671 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 672 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 673 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 674 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 675 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 676 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 677 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 678 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 679 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 680 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 681 reference operator[](difference_type __n) const {return *(*this + __n);} 682 }; 683 684 template <class _Iter1, class _Iter2> 685 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 686 bool 687 operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 688 { 689 return __x.base() == __y.base(); 690 } 691 692 template <class _Iter1, class _Iter2> 693 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 694 bool 695 operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 696 { 697 return __x.base() > __y.base(); 698 } 699 700 template <class _Iter1, class _Iter2> 701 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 702 bool 703 operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 704 { 705 return __x.base() != __y.base(); 706 } 707 708 template <class _Iter1, class _Iter2> 709 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 710 bool 711 operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 712 { 713 return __x.base() < __y.base(); 714 } 715 716 template <class _Iter1, class _Iter2> 717 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 718 bool 719 operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 720 { 721 return __x.base() <= __y.base(); 722 } 723 724 template <class _Iter1, class _Iter2> 725 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 726 bool 727 operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 728 { 729 return __x.base() >= __y.base(); 730 } 731 732 #ifndef _LIBCPP_CXX03_LANG 733 template <class _Iter1, class _Iter2> 734 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 735 auto 736 operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 737 -> decltype(__y.base() - __x.base()) 738 { 739 return __y.base() - __x.base(); 740 } 741 #else 742 template <class _Iter1, class _Iter2> 743 inline _LIBCPP_INLINE_VISIBILITY 744 typename reverse_iterator<_Iter1>::difference_type 745 operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 746 { 747 return __y.base() - __x.base(); 748 } 749 #endif 750 751 template <class _Iter> 752 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 753 reverse_iterator<_Iter> 754 operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 755 { 756 return reverse_iterator<_Iter>(__x.base() - __n); 757 } 758 759 #if _LIBCPP_STD_VER > 11 760 template <class _Iter> 761 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 762 reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 763 { 764 return reverse_iterator<_Iter>(__i); 765 } 766 #endif 767 768 template <class _Container> 769 class _LIBCPP_TEMPLATE_VIS back_insert_iterator 770 : public iterator<output_iterator_tag, 771 void, 772 void, 773 void, 774 void> 775 { 776 protected: 777 _Container* container; 778 public: 779 typedef _Container container_type; 780 781 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 782 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 783 {container->push_back(__value_); return *this;} 784 #ifndef _LIBCPP_CXX03_LANG 785 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 786 {container->push_back(_VSTD::move(__value_)); return *this;} 787 #endif // _LIBCPP_CXX03_LANG 788 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*() {return *this;} 789 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator++() {return *this;} 790 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator operator++(int) {return *this;} 791 }; 792 793 template <class _Container> 794 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 795 back_insert_iterator<_Container> 796 back_inserter(_Container& __x) 797 { 798 return back_insert_iterator<_Container>(__x); 799 } 800 801 template <class _Container> 802 class _LIBCPP_TEMPLATE_VIS front_insert_iterator 803 : public iterator<output_iterator_tag, 804 void, 805 void, 806 void, 807 void> 808 { 809 protected: 810 _Container* container; 811 public: 812 typedef _Container container_type; 813 814 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 815 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 816 {container->push_front(__value_); return *this;} 817 #ifndef _LIBCPP_CXX03_LANG 818 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 819 {container->push_front(_VSTD::move(__value_)); return *this;} 820 #endif // _LIBCPP_CXX03_LANG 821 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} 822 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator++() {return *this;} 823 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} 824 }; 825 826 template <class _Container> 827 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 828 front_insert_iterator<_Container> 829 front_inserter(_Container& __x) 830 { 831 return front_insert_iterator<_Container>(__x); 832 } 833 834 template <class _Container> 835 class _LIBCPP_TEMPLATE_VIS insert_iterator 836 : public iterator<output_iterator_tag, 837 void, 838 void, 839 void, 840 void> 841 { 842 protected: 843 _Container* container; 844 typename _Container::iterator iter; 845 public: 846 typedef _Container container_type; 847 848 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 849 : container(_VSTD::addressof(__x)), iter(__i) {} 850 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 851 {iter = container->insert(iter, __value_); ++iter; return *this;} 852 #ifndef _LIBCPP_CXX03_LANG 853 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 854 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 855 #endif // _LIBCPP_CXX03_LANG 856 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 857 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 858 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 859 }; 860 861 template <class _Container> 862 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 863 insert_iterator<_Container> 864 inserter(_Container& __x, typename _Container::iterator __i) 865 { 866 return insert_iterator<_Container>(__x, __i); 867 } 868 869 template <class _Tp, class _CharT = char, 870 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 871 class _LIBCPP_TEMPLATE_VIS istream_iterator 872 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 873 { 874 public: 875 typedef _CharT char_type; 876 typedef _Traits traits_type; 877 typedef basic_istream<_CharT,_Traits> istream_type; 878 private: 879 istream_type* __in_stream_; 880 _Tp __value_; 881 public: 882 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 883 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 884 { 885 if (!(*__in_stream_ >> __value_)) 886 __in_stream_ = nullptr; 887 } 888 889 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 890 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 891 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 892 { 893 if (!(*__in_stream_ >> __value_)) 894 __in_stream_ = nullptr; 895 return *this; 896 } 897 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 898 {istream_iterator __t(*this); ++(*this); return __t;} 899 900 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 901 friend _LIBCPP_INLINE_VISIBILITY 902 bool 903 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 904 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 905 906 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 907 friend _LIBCPP_INLINE_VISIBILITY 908 bool 909 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 910 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 911 }; 912 913 template <class _Tp, class _CharT, class _Traits, class _Distance> 914 inline _LIBCPP_INLINE_VISIBILITY 915 bool 916 operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 917 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 918 { 919 return __x.__in_stream_ == __y.__in_stream_; 920 } 921 922 template <class _Tp, class _CharT, class _Traits, class _Distance> 923 inline _LIBCPP_INLINE_VISIBILITY 924 bool 925 operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 926 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 927 { 928 return !(__x == __y); 929 } 930 931 template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 932 class _LIBCPP_TEMPLATE_VIS ostream_iterator 933 : public iterator<output_iterator_tag, void, void, void, void> 934 { 935 public: 936 typedef output_iterator_tag iterator_category; 937 typedef void value_type; 938 #if _LIBCPP_STD_VER > 17 939 typedef std::ptrdiff_t difference_type; 940 #else 941 typedef void difference_type; 942 #endif 943 typedef void pointer; 944 typedef void reference; 945 typedef _CharT char_type; 946 typedef _Traits traits_type; 947 typedef basic_ostream<_CharT, _Traits> ostream_type; 948 949 private: 950 ostream_type* __out_stream_; 951 const char_type* __delim_; 952 public: 953 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 954 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 955 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 956 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 957 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 958 { 959 *__out_stream_ << __value_; 960 if (__delim_) 961 *__out_stream_ << __delim_; 962 return *this; 963 } 964 965 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 966 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 967 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 968 }; 969 970 template<class _CharT, class _Traits> 971 class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 972 : public iterator<input_iterator_tag, _CharT, 973 typename _Traits::off_type, _CharT*, 974 _CharT> 975 { 976 public: 977 typedef _CharT char_type; 978 typedef _Traits traits_type; 979 typedef typename _Traits::int_type int_type; 980 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 981 typedef basic_istream<_CharT,_Traits> istream_type; 982 private: 983 mutable streambuf_type* __sbuf_; 984 985 class __proxy 986 { 987 char_type __keep_; 988 streambuf_type* __sbuf_; 989 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 990 : __keep_(__c), __sbuf_(__s) {} 991 friend class istreambuf_iterator; 992 public: 993 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 994 }; 995 996 _LIBCPP_INLINE_VISIBILITY 997 bool __test_for_eof() const 998 { 999 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1000 __sbuf_ = nullptr; 1001 return __sbuf_ == nullptr; 1002 } 1003 public: 1004 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1005 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1006 : __sbuf_(__s.rdbuf()) {} 1007 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1008 : __sbuf_(__s) {} 1009 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1010 : __sbuf_(__p.__sbuf_) {} 1011 1012 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1013 {return static_cast<char_type>(__sbuf_->sgetc());} 1014 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1015 { 1016 __sbuf_->sbumpc(); 1017 return *this; 1018 } 1019 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1020 { 1021 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1022 } 1023 1024 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1025 {return __test_for_eof() == __b.__test_for_eof();} 1026 }; 1027 1028 template <class _CharT, class _Traits> 1029 inline _LIBCPP_INLINE_VISIBILITY 1030 bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1031 const istreambuf_iterator<_CharT,_Traits>& __b) 1032 {return __a.equal(__b);} 1033 1034 template <class _CharT, class _Traits> 1035 inline _LIBCPP_INLINE_VISIBILITY 1036 bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1037 const istreambuf_iterator<_CharT,_Traits>& __b) 1038 {return !__a.equal(__b);} 1039 1040 template <class _CharT, class _Traits> 1041 class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1042 : public iterator<output_iterator_tag, void, void, void, void> 1043 { 1044 public: 1045 typedef output_iterator_tag iterator_category; 1046 typedef void value_type; 1047 #if _LIBCPP_STD_VER > 17 1048 typedef std::ptrdiff_t difference_type; 1049 #else 1050 typedef void difference_type; 1051 #endif 1052 typedef void pointer; 1053 typedef void reference; 1054 typedef _CharT char_type; 1055 typedef _Traits traits_type; 1056 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1057 typedef basic_ostream<_CharT, _Traits> ostream_type; 1058 1059 private: 1060 streambuf_type* __sbuf_; 1061 public: 1062 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1063 : __sbuf_(__s.rdbuf()) {} 1064 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1065 : __sbuf_(__s) {} 1066 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1067 { 1068 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1069 __sbuf_ = nullptr; 1070 return *this; 1071 } 1072 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1073 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1074 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1075 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1076 1077 template <class _Ch, class _Tr> 1078 friend 1079 _LIBCPP_HIDDEN 1080 ostreambuf_iterator<_Ch, _Tr> 1081 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1082 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1083 ios_base& __iob, _Ch __fl); 1084 }; 1085 1086 template <class _Iter> 1087 class _LIBCPP_TEMPLATE_VIS move_iterator 1088 { 1089 private: 1090 _Iter __i; 1091 public: 1092 typedef _Iter iterator_type; 1093 typedef typename iterator_traits<iterator_type>::value_type value_type; 1094 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1095 typedef iterator_type pointer; 1096 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1097 random_access_iterator_tag, 1098 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1099 #if _LIBCPP_STD_VER > 17 1100 typedef input_iterator_tag iterator_concept; 1101 #endif 1102 1103 #ifndef _LIBCPP_CXX03_LANG 1104 typedef typename iterator_traits<iterator_type>::reference __reference; 1105 typedef typename conditional< 1106 is_reference<__reference>::value, 1107 typename remove_reference<__reference>::type&&, 1108 __reference 1109 >::type reference; 1110 #else 1111 typedef typename iterator_traits<iterator_type>::reference reference; 1112 #endif 1113 1114 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1115 move_iterator() : __i() {} 1116 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1117 explicit move_iterator(_Iter __x) : __i(__x) {} 1118 template <class _Up> 1119 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1120 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1121 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1123 reference operator*() const { return static_cast<reference>(*__i); } 1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1125 pointer operator->() const { return __i;} 1126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1127 move_iterator& operator++() {++__i; return *this;} 1128 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1129 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1130 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1131 move_iterator& operator--() {--__i; return *this;} 1132 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1133 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1134 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1135 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1136 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1137 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1138 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1139 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1140 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1141 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1142 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1143 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1144 }; 1145 1146 template <class _Iter1, class _Iter2> 1147 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1148 bool 1149 operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1150 { 1151 return __x.base() == __y.base(); 1152 } 1153 1154 template <class _Iter1, class _Iter2> 1155 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1156 bool 1157 operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1158 { 1159 return __x.base() < __y.base(); 1160 } 1161 1162 template <class _Iter1, class _Iter2> 1163 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1164 bool 1165 operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1166 { 1167 return __x.base() != __y.base(); 1168 } 1169 1170 template <class _Iter1, class _Iter2> 1171 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1172 bool 1173 operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1174 { 1175 return __x.base() > __y.base(); 1176 } 1177 1178 template <class _Iter1, class _Iter2> 1179 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1180 bool 1181 operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1182 { 1183 return __x.base() >= __y.base(); 1184 } 1185 1186 template <class _Iter1, class _Iter2> 1187 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1188 bool 1189 operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1190 { 1191 return __x.base() <= __y.base(); 1192 } 1193 1194 #ifndef _LIBCPP_CXX03_LANG 1195 template <class _Iter1, class _Iter2> 1196 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1197 auto 1198 operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1199 -> decltype(__x.base() - __y.base()) 1200 { 1201 return __x.base() - __y.base(); 1202 } 1203 #else 1204 template <class _Iter1, class _Iter2> 1205 inline _LIBCPP_INLINE_VISIBILITY 1206 typename move_iterator<_Iter1>::difference_type 1207 operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1208 { 1209 return __x.base() - __y.base(); 1210 } 1211 #endif 1212 1213 template <class _Iter> 1214 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1215 move_iterator<_Iter> 1216 operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1217 { 1218 return move_iterator<_Iter>(__x.base() + __n); 1219 } 1220 1221 template <class _Iter> 1222 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1223 move_iterator<_Iter> 1224 make_move_iterator(_Iter __i) 1225 { 1226 return move_iterator<_Iter>(__i); 1227 } 1228 1229 // __wrap_iter 1230 1231 template <class _Iter> class __wrap_iter; 1232 1233 template <class _Iter1, class _Iter2> 1234 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1235 bool 1236 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1237 1238 template <class _Iter1, class _Iter2> 1239 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1240 bool 1241 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1242 1243 template <class _Iter1, class _Iter2> 1244 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1245 bool 1246 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1247 1248 template <class _Iter1, class _Iter2> 1249 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1250 bool 1251 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1252 1253 template <class _Iter1, class _Iter2> 1254 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1255 bool 1256 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1257 1258 template <class _Iter1, class _Iter2> 1259 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1260 bool 1261 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1262 1263 #ifndef _LIBCPP_CXX03_LANG 1264 template <class _Iter1, class _Iter2> 1265 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1266 auto 1267 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1268 -> decltype(__x.base() - __y.base()); 1269 #else 1270 template <class _Iter1, class _Iter2> 1271 _LIBCPP_INLINE_VISIBILITY 1272 typename __wrap_iter<_Iter1>::difference_type 1273 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1274 #endif 1275 1276 template <class _Iter> 1277 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1278 __wrap_iter<_Iter> 1279 operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1280 1281 template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1282 template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1283 template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1284 template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1285 1286 template <class _Iter> 1287 class __wrap_iter 1288 { 1289 public: 1290 typedef _Iter iterator_type; 1291 typedef typename iterator_traits<iterator_type>::value_type value_type; 1292 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1293 typedef typename iterator_traits<iterator_type>::pointer pointer; 1294 typedef typename iterator_traits<iterator_type>::reference reference; 1295 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1296 #if _LIBCPP_STD_VER > 17 1297 typedef _If<__is_cpp17_contiguous_iterator<_Iter>::value, 1298 contiguous_iterator_tag, iterator_category> iterator_concept; 1299 #endif 1300 1301 private: 1302 iterator_type __i; 1303 public: 1304 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1305 #if _LIBCPP_STD_VER > 11 1306 : __i{} 1307 #endif 1308 { 1309 #if _LIBCPP_DEBUG_LEVEL == 2 1310 __get_db()->__insert_i(this); 1311 #endif 1312 } 1313 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1314 __wrap_iter(const __wrap_iter<_Up>& __u, 1315 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1316 : __i(__u.base()) 1317 { 1318 #if _LIBCPP_DEBUG_LEVEL == 2 1319 __get_db()->__iterator_copy(this, &__u); 1320 #endif 1321 } 1322 #if _LIBCPP_DEBUG_LEVEL == 2 1323 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1324 __wrap_iter(const __wrap_iter& __x) 1325 : __i(__x.base()) 1326 { 1327 __get_db()->__iterator_copy(this, &__x); 1328 } 1329 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1330 __wrap_iter& operator=(const __wrap_iter& __x) 1331 { 1332 if (this != &__x) 1333 { 1334 __get_db()->__iterator_copy(this, &__x); 1335 __i = __x.__i; 1336 } 1337 return *this; 1338 } 1339 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1340 ~__wrap_iter() 1341 { 1342 __get_db()->__erase_i(this); 1343 } 1344 #endif 1345 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1346 { 1347 #if _LIBCPP_DEBUG_LEVEL == 2 1348 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1349 "Attempted to dereference a non-dereferenceable iterator"); 1350 #endif 1351 return *__i; 1352 } 1353 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1354 { 1355 #if _LIBCPP_DEBUG_LEVEL == 2 1356 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1357 "Attempted to dereference a non-dereferenceable iterator"); 1358 #endif 1359 return _VSTD::__to_address(__i); 1360 } 1361 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1362 { 1363 #if _LIBCPP_DEBUG_LEVEL == 2 1364 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1365 "Attempted to increment a non-incrementable iterator"); 1366 #endif 1367 ++__i; 1368 return *this; 1369 } 1370 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1371 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1372 1373 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1374 { 1375 #if _LIBCPP_DEBUG_LEVEL == 2 1376 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1377 "Attempted to decrement a non-decrementable iterator"); 1378 #endif 1379 --__i; 1380 return *this; 1381 } 1382 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1383 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1384 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1385 {__wrap_iter __w(*this); __w += __n; return __w;} 1386 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1387 { 1388 #if _LIBCPP_DEBUG_LEVEL == 2 1389 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1390 "Attempted to add/subtract an iterator outside its valid range"); 1391 #endif 1392 __i += __n; 1393 return *this; 1394 } 1395 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1396 {return *this + (-__n);} 1397 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1398 {*this += -__n; return *this;} 1399 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1400 { 1401 #if _LIBCPP_DEBUG_LEVEL == 2 1402 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1403 "Attempted to subscript an iterator outside its valid range"); 1404 #endif 1405 return __i[__n]; 1406 } 1407 1408 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1409 1410 private: 1411 #if _LIBCPP_DEBUG_LEVEL == 2 1412 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1413 { 1414 __get_db()->__insert_ic(this, __p); 1415 } 1416 #else 1417 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1418 #endif 1419 1420 template <class _Up> friend class __wrap_iter; 1421 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1422 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1423 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1424 1425 template <class _Iter1, class _Iter2> 1426 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1427 bool 1428 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1429 1430 template <class _Iter1, class _Iter2> 1431 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1432 bool 1433 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1434 1435 template <class _Iter1, class _Iter2> 1436 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1437 bool 1438 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1439 1440 template <class _Iter1, class _Iter2> 1441 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1442 bool 1443 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1444 1445 template <class _Iter1, class _Iter2> 1446 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1447 bool 1448 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1449 1450 template <class _Iter1, class _Iter2> 1451 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1452 bool 1453 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1454 1455 #ifndef _LIBCPP_CXX03_LANG 1456 template <class _Iter1, class _Iter2> 1457 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1458 auto 1459 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1460 -> decltype(__x.base() - __y.base()); 1461 #else 1462 template <class _Iter1, class _Iter2> 1463 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1464 typename __wrap_iter<_Iter1>::difference_type 1465 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1466 #endif 1467 1468 template <class _Iter1> 1469 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1470 __wrap_iter<_Iter1> 1471 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1472 }; 1473 1474 #if _LIBCPP_STD_VER <= 17 1475 template <class _It> 1476 struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : __is_cpp17_contiguous_iterator<_It> {}; 1477 #endif 1478 1479 template <class _Iter> 1480 _LIBCPP_CONSTEXPR 1481 _EnableIf<__is_cpp17_contiguous_iterator<_Iter>::value, decltype(_VSTD::__to_address(declval<_Iter>()))> 1482 __to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1483 return _VSTD::__to_address(__w.base()); 1484 } 1485 1486 template <class _Iter1, class _Iter2> 1487 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1488 bool 1489 operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1490 { 1491 return __x.base() == __y.base(); 1492 } 1493 1494 template <class _Iter1, class _Iter2> 1495 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1496 bool 1497 operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1498 { 1499 #if _LIBCPP_DEBUG_LEVEL == 2 1500 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1501 "Attempted to compare incomparable iterators"); 1502 #endif 1503 return __x.base() < __y.base(); 1504 } 1505 1506 template <class _Iter1, class _Iter2> 1507 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1508 bool 1509 operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1510 { 1511 return !(__x == __y); 1512 } 1513 1514 template <class _Iter1, class _Iter2> 1515 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1516 bool 1517 operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1518 { 1519 return __y < __x; 1520 } 1521 1522 template <class _Iter1, class _Iter2> 1523 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1524 bool 1525 operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1526 { 1527 return !(__x < __y); 1528 } 1529 1530 template <class _Iter1, class _Iter2> 1531 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1532 bool 1533 operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1534 { 1535 return !(__y < __x); 1536 } 1537 1538 template <class _Iter1> 1539 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1540 bool 1541 operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1542 { 1543 return !(__x == __y); 1544 } 1545 1546 template <class _Iter1> 1547 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1548 bool 1549 operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1550 { 1551 return __y < __x; 1552 } 1553 1554 template <class _Iter1> 1555 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1556 bool 1557 operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1558 { 1559 return !(__x < __y); 1560 } 1561 1562 template <class _Iter1> 1563 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1564 bool 1565 operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1566 { 1567 return !(__y < __x); 1568 } 1569 1570 #ifndef _LIBCPP_CXX03_LANG 1571 template <class _Iter1, class _Iter2> 1572 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1573 auto 1574 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1575 -> decltype(__x.base() - __y.base()) 1576 { 1577 #if _LIBCPP_DEBUG_LEVEL == 2 1578 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1579 "Attempted to subtract incompatible iterators"); 1580 #endif 1581 return __x.base() - __y.base(); 1582 } 1583 #else 1584 template <class _Iter1, class _Iter2> 1585 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1586 typename __wrap_iter<_Iter1>::difference_type 1587 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1588 { 1589 #if _LIBCPP_DEBUG_LEVEL == 2 1590 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1591 "Attempted to subtract incompatible iterators"); 1592 #endif 1593 return __x.base() - __y.base(); 1594 } 1595 #endif 1596 1597 template <class _Iter> 1598 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1599 __wrap_iter<_Iter> 1600 operator+(typename __wrap_iter<_Iter>::difference_type __n, 1601 __wrap_iter<_Iter> __x) _NOEXCEPT 1602 { 1603 __x += __n; 1604 return __x; 1605 } 1606 1607 template <class _Tp, size_t _Np> 1608 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1609 _Tp* 1610 begin(_Tp (&__array)[_Np]) 1611 { 1612 return __array; 1613 } 1614 1615 template <class _Tp, size_t _Np> 1616 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1617 _Tp* 1618 end(_Tp (&__array)[_Np]) 1619 { 1620 return __array + _Np; 1621 } 1622 1623 #if !defined(_LIBCPP_CXX03_LANG) 1624 1625 template <class _Cp> 1626 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1627 auto 1628 begin(_Cp& __c) -> decltype(__c.begin()) 1629 { 1630 return __c.begin(); 1631 } 1632 1633 template <class _Cp> 1634 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1635 auto 1636 begin(const _Cp& __c) -> decltype(__c.begin()) 1637 { 1638 return __c.begin(); 1639 } 1640 1641 template <class _Cp> 1642 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1643 auto 1644 end(_Cp& __c) -> decltype(__c.end()) 1645 { 1646 return __c.end(); 1647 } 1648 1649 template <class _Cp> 1650 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1651 auto 1652 end(const _Cp& __c) -> decltype(__c.end()) 1653 { 1654 return __c.end(); 1655 } 1656 1657 #if _LIBCPP_STD_VER > 11 1658 1659 template <class _Tp, size_t _Np> 1660 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1661 reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1662 { 1663 return reverse_iterator<_Tp*>(__array + _Np); 1664 } 1665 1666 template <class _Tp, size_t _Np> 1667 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1668 reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1669 { 1670 return reverse_iterator<_Tp*>(__array); 1671 } 1672 1673 template <class _Ep> 1674 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1675 reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1676 { 1677 return reverse_iterator<const _Ep*>(__il.end()); 1678 } 1679 1680 template <class _Ep> 1681 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1682 reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1683 { 1684 return reverse_iterator<const _Ep*>(__il.begin()); 1685 } 1686 1687 template <class _Cp> 1688 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1689 auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1690 { 1691 return _VSTD::begin(__c); 1692 } 1693 1694 template <class _Cp> 1695 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1696 auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1697 { 1698 return _VSTD::end(__c); 1699 } 1700 1701 template <class _Cp> 1702 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1703 auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1704 { 1705 return __c.rbegin(); 1706 } 1707 1708 template <class _Cp> 1709 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1710 auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1711 { 1712 return __c.rbegin(); 1713 } 1714 1715 template <class _Cp> 1716 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1717 auto rend(_Cp& __c) -> decltype(__c.rend()) 1718 { 1719 return __c.rend(); 1720 } 1721 1722 template <class _Cp> 1723 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1724 auto rend(const _Cp& __c) -> decltype(__c.rend()) 1725 { 1726 return __c.rend(); 1727 } 1728 1729 template <class _Cp> 1730 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1731 auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1732 { 1733 return _VSTD::rbegin(__c); 1734 } 1735 1736 template <class _Cp> 1737 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1738 auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1739 { 1740 return _VSTD::rend(__c); 1741 } 1742 1743 #endif 1744 1745 1746 #else // defined(_LIBCPP_CXX03_LANG) 1747 1748 template <class _Cp> 1749 _LIBCPP_INLINE_VISIBILITY 1750 typename _Cp::iterator 1751 begin(_Cp& __c) 1752 { 1753 return __c.begin(); 1754 } 1755 1756 template <class _Cp> 1757 _LIBCPP_INLINE_VISIBILITY 1758 typename _Cp::const_iterator 1759 begin(const _Cp& __c) 1760 { 1761 return __c.begin(); 1762 } 1763 1764 template <class _Cp> 1765 _LIBCPP_INLINE_VISIBILITY 1766 typename _Cp::iterator 1767 end(_Cp& __c) 1768 { 1769 return __c.end(); 1770 } 1771 1772 template <class _Cp> 1773 _LIBCPP_INLINE_VISIBILITY 1774 typename _Cp::const_iterator 1775 end(const _Cp& __c) 1776 { 1777 return __c.end(); 1778 } 1779 1780 #endif // !defined(_LIBCPP_CXX03_LANG) 1781 1782 #if _LIBCPP_STD_VER > 14 1783 1784 // #if _LIBCPP_STD_VER > 11 1785 // template <> 1786 // struct _LIBCPP_TEMPLATE_VIS plus<void> 1787 // { 1788 // template <class _T1, class _T2> 1789 // _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1790 // auto operator()(_T1&& __t, _T2&& __u) const 1791 // _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1792 // -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1793 // { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1794 // typedef void is_transparent; 1795 // }; 1796 // #endif 1797 1798 template <class _Cont> 1799 _LIBCPP_INLINE_VISIBILITY 1800 constexpr auto size(const _Cont& __c) 1801 _NOEXCEPT_(noexcept(__c.size())) 1802 -> decltype (__c.size()) 1803 { return __c.size(); } 1804 1805 template <class _Tp, size_t _Sz> 1806 _LIBCPP_INLINE_VISIBILITY 1807 constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1808 1809 #if _LIBCPP_STD_VER > 17 1810 template <class _Cont> 1811 _LIBCPP_INLINE_VISIBILITY 1812 constexpr auto ssize(const _Cont& __c) 1813 _NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1814 -> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1815 { return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1816 1817 template <class _Tp, ptrdiff_t _Sz> 1818 _LIBCPP_INLINE_VISIBILITY 1819 constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1820 #endif 1821 1822 template <class _Cont> 1823 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1824 constexpr auto empty(const _Cont& __c) 1825 _NOEXCEPT_(noexcept(__c.empty())) 1826 -> decltype (__c.empty()) 1827 { return __c.empty(); } 1828 1829 template <class _Tp, size_t _Sz> 1830 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1831 constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1832 1833 template <class _Ep> 1834 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1835 constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1836 1837 template <class _Cont> constexpr 1838 _LIBCPP_INLINE_VISIBILITY 1839 auto data(_Cont& __c) 1840 _NOEXCEPT_(noexcept(__c.data())) 1841 -> decltype (__c.data()) 1842 { return __c.data(); } 1843 1844 template <class _Cont> constexpr 1845 _LIBCPP_INLINE_VISIBILITY 1846 auto data(const _Cont& __c) 1847 _NOEXCEPT_(noexcept(__c.data())) 1848 -> decltype (__c.data()) 1849 { return __c.data(); } 1850 1851 template <class _Tp, size_t _Sz> 1852 _LIBCPP_INLINE_VISIBILITY 1853 constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1854 1855 template <class _Ep> 1856 _LIBCPP_INLINE_VISIBILITY 1857 constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1858 #endif 1859 1860 template <class _Container, class _Predicate> 1861 typename _Container::size_type 1862 __libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1863 typename _Container::size_type __old_size = __c.size(); 1864 1865 const typename _Container::iterator __last = __c.end(); 1866 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 1867 if (__pred(*__iter)) 1868 __iter = __c.erase(__iter); 1869 else 1870 ++__iter; 1871 } 1872 1873 return __old_size - __c.size(); 1874 } 1875 1876 _LIBCPP_END_NAMESPACE_STD 1877 1878 #endif // _LIBCPP_ITERATOR 1879
Indexes created Wed Jun 10 00:26:05 UTC 2026