1 // -*- C++ -*- 2 //===-------------------------- iterator ----------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 #ifndef _LIBCPP_ITERATOR 12 #define _LIBCPP_ITERATOR 13 14 /* 15 iterator synopsis 16 17 namespace std 18 { 19 20 template<class Iterator> 21 struct iterator_traits 22 { 23 typedef typename Iterator::difference_type difference_type; 24 typedef typename Iterator::value_type value_type; 25 typedef typename Iterator::pointer pointer; 26 typedef typename Iterator::reference reference; 27 typedef typename Iterator::iterator_category iterator_category; 28 }; 29 30 template<class T> 31 struct iterator_traits<T*> 32 { 33 typedef ptrdiff_t difference_type; 34 typedef T value_type; 35 typedef T* pointer; 36 typedef T& reference; 37 typedef random_access_iterator_tag iterator_category; 38 }; 39 40 template<class Category, class T, class Distance = ptrdiff_t, 41 class Pointer = T*, class Reference = T&> 42 struct iterator 43 { 44 typedef T value_type; 45 typedef Distance difference_type; 46 typedef Pointer pointer; 47 typedef Reference reference; 48 typedef Category iterator_category; 49 }; 50 51 struct input_iterator_tag {}; 52 struct output_iterator_tag {}; 53 struct forward_iterator_tag : public input_iterator_tag {}; 54 struct bidirectional_iterator_tag : public forward_iterator_tag {}; 55 struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 56 57 // 27.4.3, iterator operations 58 // extension: second argument not conforming to C++03 59 template <class InputIterator> // constexpr in C++17 60 constexpr void advance(InputIterator& i, 61 typename iterator_traits<InputIterator>::difference_type n); 62 63 template <class InputIterator> // constexpr in C++17 64 constexpr typename iterator_traits<InputIterator>::difference_type 65 distance(InputIterator first, InputIterator last); 66 67 template <class InputIterator> // constexpr in C++17 68 constexpr InputIterator next(InputIterator x, 69 typename iterator_traits<InputIterator>::difference_type n = 1); 70 71 template <class BidirectionalIterator> // constexpr in C++17 72 constexpr BidirectionalIterator prev(BidirectionalIterator x, 73 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 74 75 template <class Iterator> 76 class reverse_iterator 77 : public iterator<typename iterator_traits<Iterator>::iterator_category, 78 typename iterator_traits<Iterator>::value_type, 79 typename iterator_traits<Iterator>::difference_type, 80 typename iterator_traits<Iterator>::pointer, 81 typename iterator_traits<Iterator>::reference> 82 { 83 protected: 84 Iterator current; 85 public: 86 typedef Iterator iterator_type; 87 typedef typename iterator_traits<Iterator>::difference_type difference_type; 88 typedef typename iterator_traits<Iterator>::reference reference; 89 typedef typename iterator_traits<Iterator>::pointer pointer; 90 91 constexpr reverse_iterator(); 92 constexpr explicit reverse_iterator(Iterator x); 93 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 94 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 95 constexpr Iterator base() const; 96 constexpr reference operator*() const; 97 constexpr pointer operator->() const; 98 constexpr reverse_iterator& operator++(); 99 constexpr reverse_iterator operator++(int); 100 constexpr reverse_iterator& operator--(); 101 constexpr reverse_iterator operator--(int); 102 constexpr reverse_iterator operator+ (difference_type n) const; 103 constexpr reverse_iterator& operator+=(difference_type n); 104 constexpr reverse_iterator operator- (difference_type n) const; 105 constexpr reverse_iterator& operator-=(difference_type n); 106 constexpr reference operator[](difference_type n) const; 107 }; 108 109 template <class Iterator1, class Iterator2> 110 constexpr bool // constexpr in C++17 111 operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 112 113 template <class Iterator1, class Iterator2> 114 constexpr bool // constexpr in C++17 115 operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 116 117 template <class Iterator1, class Iterator2> 118 constexpr bool // constexpr in C++17 119 operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 120 121 template <class Iterator1, class Iterator2> 122 constexpr bool // constexpr in C++17 123 operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 124 125 template <class Iterator1, class Iterator2> 126 constexpr bool // constexpr in C++17 127 operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 128 129 template <class Iterator1, class Iterator2> 130 constexpr bool // constexpr in C++17 131 operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 132 133 template <class Iterator1, class Iterator2> 134 constexpr auto 135 operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 136 -> decltype(__y.base() - __x.base()); // constexpr in C++17 137 138 template <class Iterator> 139 constexpr reverse_iterator<Iterator> 140 operator+(typename reverse_iterator<Iterator>::difference_type n, 141 const reverse_iterator<Iterator>& x); // constexpr in C++17 142 143 template <class Iterator> 144 constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 145 146 template <class Container> 147 class back_insert_iterator 148 { 149 protected: 150 Container* container; 151 public: 152 typedef Container container_type; 153 typedef void value_type; 154 typedef void difference_type; 155 typedef void reference; 156 typedef void pointer; 157 158 explicit back_insert_iterator(Container& x); 159 back_insert_iterator& operator=(const typename Container::value_type& value); 160 back_insert_iterator& operator*(); 161 back_insert_iterator& operator++(); 162 back_insert_iterator operator++(int); 163 }; 164 165 template <class Container> back_insert_iterator<Container> back_inserter(Container& x); 166 167 template <class Container> 168 class front_insert_iterator 169 { 170 protected: 171 Container* container; 172 public: 173 typedef Container container_type; 174 typedef void value_type; 175 typedef void difference_type; 176 typedef void reference; 177 typedef void pointer; 178 179 explicit front_insert_iterator(Container& x); 180 front_insert_iterator& operator=(const typename Container::value_type& value); 181 front_insert_iterator& operator*(); 182 front_insert_iterator& operator++(); 183 front_insert_iterator operator++(int); 184 }; 185 186 template <class Container> front_insert_iterator<Container> front_inserter(Container& x); 187 188 template <class Container> 189 class insert_iterator 190 { 191 protected: 192 Container* container; 193 typename Container::iterator iter; 194 public: 195 typedef Container container_type; 196 typedef void value_type; 197 typedef void difference_type; 198 typedef void reference; 199 typedef void pointer; 200 201 insert_iterator(Container& x, typename Container::iterator i); 202 insert_iterator& operator=(const typename Container::value_type& value); 203 insert_iterator& operator*(); 204 insert_iterator& operator++(); 205 insert_iterator& operator++(int); 206 }; 207 208 template <class Container, class Iterator> 209 insert_iterator<Container> inserter(Container& x, Iterator i); 210 211 template <class Iterator> 212 class move_iterator { 213 public: 214 typedef Iterator iterator_type; 215 typedef typename iterator_traits<Iterator>::difference_type difference_type; 216 typedef Iterator pointer; 217 typedef typename iterator_traits<Iterator>::value_type value_type; 218 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 219 typedef value_type&& reference; 220 221 constexpr move_iterator(); // all the constexprs are in C++17 222 constexpr explicit move_iterator(Iterator i); 223 template <class U> 224 constexpr move_iterator(const move_iterator<U>& u); 225 template <class U> 226 constexpr move_iterator& operator=(const move_iterator<U>& u); 227 constexpr iterator_type base() const; 228 constexpr reference operator*() const; 229 constexpr pointer operator->() const; 230 constexpr move_iterator& operator++(); 231 constexpr move_iterator operator++(int); 232 constexpr move_iterator& operator--(); 233 constexpr move_iterator operator--(int); 234 constexpr move_iterator operator+(difference_type n) const; 235 constexpr move_iterator& operator+=(difference_type n); 236 constexpr move_iterator operator-(difference_type n) const; 237 constexpr move_iterator& operator-=(difference_type n); 238 constexpr unspecified operator[](difference_type n) const; 239 private: 240 Iterator current; // exposition only 241 }; 242 243 template <class Iterator1, class Iterator2> 244 constexpr bool // constexpr in C++17 245 operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 246 247 template <class Iterator1, class Iterator2> 248 constexpr bool // constexpr in C++17 249 operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 250 251 template <class Iterator1, class Iterator2> 252 constexpr bool // constexpr in C++17 253 operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 254 255 template <class Iterator1, class Iterator2> 256 constexpr bool // constexpr in C++17 257 operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 258 259 template <class Iterator1, class Iterator2> 260 constexpr bool // constexpr in C++17 261 operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 262 263 template <class Iterator1, class Iterator2> 264 constexpr bool // constexpr in C++17 265 operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 266 267 template <class Iterator1, class Iterator2> 268 constexpr auto // constexpr in C++17 269 operator-(const move_iterator<Iterator1>& x, 270 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 271 272 template <class Iterator> 273 constexpr move_iterator<Iterator> operator+( // constexpr in C++17 274 typename move_iterator<Iterator>::difference_type n, 275 const move_iterator<Iterator>& x); 276 277 template <class Iterator> // constexpr in C++17 278 constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 279 280 281 template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 282 class istream_iterator 283 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 284 { 285 public: 286 typedef charT char_type; 287 typedef traits traits_type; 288 typedef basic_istream<charT,traits> istream_type; 289 290 constexpr istream_iterator(); 291 istream_iterator(istream_type& s); 292 istream_iterator(const istream_iterator& x); 293 ~istream_iterator(); 294 295 const T& operator*() const; 296 const T* operator->() const; 297 istream_iterator& operator++(); 298 istream_iterator operator++(int); 299 }; 300 301 template <class T, class charT, class traits, class Distance> 302 bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 303 const istream_iterator<T,charT,traits,Distance>& y); 304 template <class T, class charT, class traits, class Distance> 305 bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 306 const istream_iterator<T,charT,traits,Distance>& y); 307 308 template <class T, class charT = char, class traits = char_traits<charT> > 309 class ostream_iterator 310 : public iterator<output_iterator_tag, void, void, void ,void> 311 { 312 public: 313 typedef charT char_type; 314 typedef traits traits_type; 315 typedef basic_ostream<charT,traits> ostream_type; 316 317 ostream_iterator(ostream_type& s); 318 ostream_iterator(ostream_type& s, const charT* delimiter); 319 ostream_iterator(const ostream_iterator& x); 320 ~ostream_iterator(); 321 ostream_iterator& operator=(const T& value); 322 323 ostream_iterator& operator*(); 324 ostream_iterator& operator++(); 325 ostream_iterator& operator++(int); 326 }; 327 328 template<class charT, class traits = char_traits<charT> > 329 class istreambuf_iterator 330 : public iterator<input_iterator_tag, charT, 331 typename traits::off_type, unspecified, 332 charT> 333 { 334 public: 335 typedef charT char_type; 336 typedef traits traits_type; 337 typedef typename traits::int_type int_type; 338 typedef basic_streambuf<charT,traits> streambuf_type; 339 typedef basic_istream<charT,traits> istream_type; 340 341 istreambuf_iterator() noexcept; 342 istreambuf_iterator(istream_type& s) noexcept; 343 istreambuf_iterator(streambuf_type* s) noexcept; 344 istreambuf_iterator(a-private-type) noexcept; 345 346 charT operator*() const; 347 pointer operator->() const; 348 istreambuf_iterator& operator++(); 349 a-private-type operator++(int); 350 351 bool equal(const istreambuf_iterator& b) const; 352 }; 353 354 template <class charT, class traits> 355 bool operator==(const istreambuf_iterator<charT,traits>& a, 356 const istreambuf_iterator<charT,traits>& b); 357 template <class charT, class traits> 358 bool operator!=(const istreambuf_iterator<charT,traits>& a, 359 const istreambuf_iterator<charT,traits>& b); 360 361 template <class charT, class traits = char_traits<charT> > 362 class ostreambuf_iterator 363 : public iterator<output_iterator_tag, void, void, void, void> 364 { 365 public: 366 typedef charT char_type; 367 typedef traits traits_type; 368 typedef basic_streambuf<charT,traits> streambuf_type; 369 typedef basic_ostream<charT,traits> ostream_type; 370 371 ostreambuf_iterator(ostream_type& s) noexcept; 372 ostreambuf_iterator(streambuf_type* s) noexcept; 373 ostreambuf_iterator& operator=(charT c); 374 ostreambuf_iterator& operator*(); 375 ostreambuf_iterator& operator++(); 376 ostreambuf_iterator& operator++(int); 377 bool failed() const noexcept; 378 }; 379 380 template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 381 template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 382 template <class C> constexpr auto end(C& c) -> decltype(c.end()); 383 template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 384 template <class T, size_t N> constexpr T* begin(T (&array)[N]); 385 template <class T, size_t N> constexpr T* end(T (&array)[N]); 386 387 template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 388 template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 389 template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 390 template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 391 template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 392 template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 393 template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 394 template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 395 template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 396 template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 397 template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 398 template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 399 400 // 24.8, container access: 401 template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 402 template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 403 template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 404 template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 405 template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 406 template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 407 template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 408 template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 409 template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 410 411 } // std 412 413 */ 414 415 #include <__config> 416 #include <iosfwd> // for forward declarations of vector and string. 417 #include <__functional_base> 418 #include <type_traits> 419 #include <cstddef> 420 #include <initializer_list> 421 #include <version> 422 #ifdef __APPLE__ 423 #include <Availability.h> 424 #endif 425 426 #include <__debug> 427 428 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 429 #pragma GCC system_header 430 #endif 431 432 _LIBCPP_BEGIN_NAMESPACE_STD 433 434 struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {}; 435 struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {}; 436 struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {}; 437 struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {}; 438 struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {}; 439 440 template <class _Tp> 441 struct __has_iterator_typedefs 442 { 443 private: 444 struct __two {char __lx; char __lxx;}; 445 template <class _Up> static __two __test(...); 446 template <class _Up> static char __test(typename std::__void_t<typename _Up::iterator_category>::type* = 0, 447 typename std::__void_t<typename _Up::difference_type>::type* = 0, 448 typename std::__void_t<typename _Up::value_type>::type* = 0, 449 typename std::__void_t<typename _Up::reference>::type* = 0, 450 typename std::__void_t<typename _Up::pointer>::type* = 0 451 ); 452 public: 453 static const bool value = sizeof(__test<_Tp>(0,0,0,0,0)) == 1; 454 }; 455 456 457 template <class _Tp> 458 struct __has_iterator_category 459 { 460 private: 461 struct __two {char __lx; char __lxx;}; 462 template <class _Up> static __two __test(...); 463 template <class _Up> static char __test(typename _Up::iterator_category* = 0); 464 public: 465 static const bool value = sizeof(__test<_Tp>(0)) == 1; 466 }; 467 468 template <class _Iter, bool> struct __iterator_traits_impl {}; 469 470 template <class _Iter> 471 struct __iterator_traits_impl<_Iter, true> 472 { 473 typedef typename _Iter::difference_type difference_type; 474 typedef typename _Iter::value_type value_type; 475 typedef typename _Iter::pointer pointer; 476 typedef typename _Iter::reference reference; 477 typedef typename _Iter::iterator_category iterator_category; 478 }; 479 480 template <class _Iter, bool> struct __iterator_traits {}; 481 482 template <class _Iter> 483 struct __iterator_traits<_Iter, true> 484 : __iterator_traits_impl 485 < 486 _Iter, 487 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 488 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 489 > 490 {}; 491 492 // iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 493 // exists. Else iterator_traits<Iterator> will be an empty class. This is a 494 // conforming extension which allows some programs to compile and behave as 495 // the client expects instead of failing at compile time. 496 497 template <class _Iter> 498 struct _LIBCPP_TEMPLATE_VIS iterator_traits 499 : __iterator_traits<_Iter, __has_iterator_typedefs<_Iter>::value> {}; 500 501 template<class _Tp> 502 struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 503 { 504 typedef ptrdiff_t difference_type; 505 typedef typename remove_cv<_Tp>::type value_type; 506 typedef _Tp* pointer; 507 typedef _Tp& reference; 508 typedef random_access_iterator_tag iterator_category; 509 }; 510 511 template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 512 struct __has_iterator_category_convertible_to 513 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 514 {}; 515 516 template <class _Tp, class _Up> 517 struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 518 519 template <class _Tp> 520 struct __is_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 521 522 template <class _Tp> 523 struct __is_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 524 525 template <class _Tp> 526 struct __is_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 527 528 template <class _Tp> 529 struct __is_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 530 531 template <class _Tp> 532 struct __is_exactly_input_iterator 533 : public integral_constant<bool, 534 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 535 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 536 537 template<class _Category, class _Tp, class _Distance = ptrdiff_t, 538 class _Pointer = _Tp*, class _Reference = _Tp&> 539 struct _LIBCPP_TEMPLATE_VIS iterator 540 { 541 typedef _Tp value_type; 542 typedef _Distance difference_type; 543 typedef _Pointer pointer; 544 typedef _Reference reference; 545 typedef _Category iterator_category; 546 }; 547 548 template <class _InputIter> 549 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 550 void __advance(_InputIter& __i, 551 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 552 { 553 for (; __n > 0; --__n) 554 ++__i; 555 } 556 557 template <class _BiDirIter> 558 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 559 void __advance(_BiDirIter& __i, 560 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 561 { 562 if (__n >= 0) 563 for (; __n > 0; --__n) 564 ++__i; 565 else 566 for (; __n < 0; ++__n) 567 --__i; 568 } 569 570 template <class _RandIter> 571 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 572 void __advance(_RandIter& __i, 573 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 574 { 575 __i += __n; 576 } 577 578 template <class _InputIter> 579 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 580 void advance(_InputIter& __i, 581 typename iterator_traits<_InputIter>::difference_type __n) 582 { 583 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 584 } 585 586 template <class _InputIter> 587 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 588 typename iterator_traits<_InputIter>::difference_type 589 __distance(_InputIter __first, _InputIter __last, input_iterator_tag) 590 { 591 typename iterator_traits<_InputIter>::difference_type __r(0); 592 for (; __first != __last; ++__first) 593 ++__r; 594 return __r; 595 } 596 597 template <class _RandIter> 598 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 599 typename iterator_traits<_RandIter>::difference_type 600 __distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 601 { 602 return __last - __first; 603 } 604 605 template <class _InputIter> 606 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 607 typename iterator_traits<_InputIter>::difference_type 608 distance(_InputIter __first, _InputIter __last) 609 { 610 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 611 } 612 613 template <class _InputIter> 614 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 615 typename enable_if 616 < 617 __is_input_iterator<_InputIter>::value, 618 _InputIter 619 >::type 620 next(_InputIter __x, 621 typename iterator_traits<_InputIter>::difference_type __n = 1) 622 { 623 _VSTD::advance(__x, __n); 624 return __x; 625 } 626 627 template <class _BidirectionalIter> 628 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 629 typename enable_if 630 < 631 __is_bidirectional_iterator<_BidirectionalIter>::value, 632 _BidirectionalIter 633 >::type 634 prev(_BidirectionalIter __x, 635 typename iterator_traits<_BidirectionalIter>::difference_type __n = 1) 636 { 637 _VSTD::advance(__x, -__n); 638 return __x; 639 } 640 641 642 template <class _Tp, class = void> 643 struct __is_stashing_iterator : false_type {}; 644 645 template <class _Tp> 646 struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 647 : true_type {}; 648 649 template <class _Iter> 650 class _LIBCPP_TEMPLATE_VIS reverse_iterator 651 : public iterator<typename iterator_traits<_Iter>::iterator_category, 652 typename iterator_traits<_Iter>::value_type, 653 typename iterator_traits<_Iter>::difference_type, 654 typename iterator_traits<_Iter>::pointer, 655 typename iterator_traits<_Iter>::reference> 656 { 657 private: 658 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 659 660 static_assert(!__is_stashing_iterator<_Iter>::value, 661 "The specified iterator type cannot be used with reverse_iterator; " 662 "Using stashing iterators with reverse_iterator causes undefined behavior"); 663 664 protected: 665 _Iter current; 666 public: 667 typedef _Iter iterator_type; 668 typedef typename iterator_traits<_Iter>::difference_type difference_type; 669 typedef typename iterator_traits<_Iter>::reference reference; 670 typedef typename iterator_traits<_Iter>::pointer pointer; 671 672 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 673 reverse_iterator() : __t(), current() {} 674 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 675 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 676 template <class _Up> 677 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 678 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 679 template <class _Up> 680 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 681 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 682 { __t = current = __u.base(); return *this; } 683 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 684 _Iter base() const {return current;} 685 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 686 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 687 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 688 pointer operator->() const {return _VSTD::addressof(operator*());} 689 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 690 reverse_iterator& operator++() {--current; return *this;} 691 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 692 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 693 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 694 reverse_iterator& operator--() {++current; return *this;} 695 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 696 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 697 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 698 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 699 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 700 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 701 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 702 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 703 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 704 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 705 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 706 reference operator[](difference_type __n) const {return *(*this + __n);} 707 }; 708 709 template <class _Iter1, class _Iter2> 710 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 711 bool 712 operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 713 { 714 return __x.base() == __y.base(); 715 } 716 717 template <class _Iter1, class _Iter2> 718 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 719 bool 720 operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 721 { 722 return __x.base() > __y.base(); 723 } 724 725 template <class _Iter1, class _Iter2> 726 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 727 bool 728 operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 729 { 730 return __x.base() != __y.base(); 731 } 732 733 template <class _Iter1, class _Iter2> 734 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 735 bool 736 operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 737 { 738 return __x.base() < __y.base(); 739 } 740 741 template <class _Iter1, class _Iter2> 742 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 743 bool 744 operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 745 { 746 return __x.base() <= __y.base(); 747 } 748 749 template <class _Iter1, class _Iter2> 750 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 751 bool 752 operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 753 { 754 return __x.base() >= __y.base(); 755 } 756 757 #ifndef _LIBCPP_CXX03_LANG 758 template <class _Iter1, class _Iter2> 759 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 760 auto 761 operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 762 -> decltype(__y.base() - __x.base()) 763 { 764 return __y.base() - __x.base(); 765 } 766 #else 767 template <class _Iter1, class _Iter2> 768 inline _LIBCPP_INLINE_VISIBILITY 769 typename reverse_iterator<_Iter1>::difference_type 770 operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 771 { 772 return __y.base() - __x.base(); 773 } 774 #endif 775 776 template <class _Iter> 777 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 778 reverse_iterator<_Iter> 779 operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 780 { 781 return reverse_iterator<_Iter>(__x.base() - __n); 782 } 783 784 #if _LIBCPP_STD_VER > 11 785 template <class _Iter> 786 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 787 reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 788 { 789 return reverse_iterator<_Iter>(__i); 790 } 791 #endif 792 793 template <class _Container> 794 class _LIBCPP_TEMPLATE_VIS back_insert_iterator 795 : public iterator<output_iterator_tag, 796 void, 797 void, 798 void, 799 void> 800 { 801 protected: 802 _Container* container; 803 public: 804 typedef _Container container_type; 805 806 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 807 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 808 {container->push_back(__value_); return *this;} 809 #ifndef _LIBCPP_CXX03_LANG 810 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 811 {container->push_back(_VSTD::move(__value_)); return *this;} 812 #endif // _LIBCPP_CXX03_LANG 813 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 814 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 815 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 816 }; 817 818 template <class _Container> 819 inline _LIBCPP_INLINE_VISIBILITY 820 back_insert_iterator<_Container> 821 back_inserter(_Container& __x) 822 { 823 return back_insert_iterator<_Container>(__x); 824 } 825 826 template <class _Container> 827 class _LIBCPP_TEMPLATE_VIS front_insert_iterator 828 : public iterator<output_iterator_tag, 829 void, 830 void, 831 void, 832 void> 833 { 834 protected: 835 _Container* container; 836 public: 837 typedef _Container container_type; 838 839 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 840 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 841 {container->push_front(__value_); return *this;} 842 #ifndef _LIBCPP_CXX03_LANG 843 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 844 {container->push_front(_VSTD::move(__value_)); return *this;} 845 #endif // _LIBCPP_CXX03_LANG 846 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 847 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 848 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 849 }; 850 851 template <class _Container> 852 inline _LIBCPP_INLINE_VISIBILITY 853 front_insert_iterator<_Container> 854 front_inserter(_Container& __x) 855 { 856 return front_insert_iterator<_Container>(__x); 857 } 858 859 template <class _Container> 860 class _LIBCPP_TEMPLATE_VIS insert_iterator 861 : public iterator<output_iterator_tag, 862 void, 863 void, 864 void, 865 void> 866 { 867 protected: 868 _Container* container; 869 typename _Container::iterator iter; 870 public: 871 typedef _Container container_type; 872 873 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 874 : container(_VSTD::addressof(__x)), iter(__i) {} 875 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 876 {iter = container->insert(iter, __value_); ++iter; return *this;} 877 #ifndef _LIBCPP_CXX03_LANG 878 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 879 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 880 #endif // _LIBCPP_CXX03_LANG 881 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 882 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 883 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 884 }; 885 886 template <class _Container> 887 inline _LIBCPP_INLINE_VISIBILITY 888 insert_iterator<_Container> 889 inserter(_Container& __x, typename _Container::iterator __i) 890 { 891 return insert_iterator<_Container>(__x, __i); 892 } 893 894 template <class _Tp, class _CharT = char, 895 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 896 class _LIBCPP_TEMPLATE_VIS istream_iterator 897 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 898 { 899 public: 900 typedef _CharT char_type; 901 typedef _Traits traits_type; 902 typedef basic_istream<_CharT,_Traits> istream_type; 903 private: 904 istream_type* __in_stream_; 905 _Tp __value_; 906 public: 907 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 908 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 909 { 910 if (!(*__in_stream_ >> __value_)) 911 __in_stream_ = 0; 912 } 913 914 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 915 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 916 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 917 { 918 if (!(*__in_stream_ >> __value_)) 919 __in_stream_ = 0; 920 return *this; 921 } 922 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 923 {istream_iterator __t(*this); ++(*this); return __t;} 924 925 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 926 friend _LIBCPP_INLINE_VISIBILITY 927 bool 928 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 929 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 930 931 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 932 friend _LIBCPP_INLINE_VISIBILITY 933 bool 934 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 935 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 936 }; 937 938 template <class _Tp, class _CharT, class _Traits, class _Distance> 939 inline _LIBCPP_INLINE_VISIBILITY 940 bool 941 operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 942 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 943 { 944 return __x.__in_stream_ == __y.__in_stream_; 945 } 946 947 template <class _Tp, class _CharT, class _Traits, class _Distance> 948 inline _LIBCPP_INLINE_VISIBILITY 949 bool 950 operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 951 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 952 { 953 return !(__x == __y); 954 } 955 956 template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 957 class _LIBCPP_TEMPLATE_VIS ostream_iterator 958 : public iterator<output_iterator_tag, void, void, void, void> 959 { 960 public: 961 typedef _CharT char_type; 962 typedef _Traits traits_type; 963 typedef basic_ostream<_CharT,_Traits> ostream_type; 964 private: 965 ostream_type* __out_stream_; 966 const char_type* __delim_; 967 public: 968 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 969 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 970 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 971 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 972 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 973 { 974 *__out_stream_ << __value_; 975 if (__delim_) 976 *__out_stream_ << __delim_; 977 return *this; 978 } 979 980 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 981 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 982 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 983 }; 984 985 template<class _CharT, class _Traits> 986 class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 987 : public iterator<input_iterator_tag, _CharT, 988 typename _Traits::off_type, _CharT*, 989 _CharT> 990 { 991 public: 992 typedef _CharT char_type; 993 typedef _Traits traits_type; 994 typedef typename _Traits::int_type int_type; 995 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 996 typedef basic_istream<_CharT,_Traits> istream_type; 997 private: 998 mutable streambuf_type* __sbuf_; 999 1000 class __proxy 1001 { 1002 char_type __keep_; 1003 streambuf_type* __sbuf_; 1004 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1005 : __keep_(__c), __sbuf_(__s) {} 1006 friend class istreambuf_iterator; 1007 public: 1008 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1009 }; 1010 1011 _LIBCPP_INLINE_VISIBILITY 1012 bool __test_for_eof() const 1013 { 1014 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1015 __sbuf_ = 0; 1016 return __sbuf_ == 0; 1017 } 1018 public: 1019 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 1020 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1021 : __sbuf_(__s.rdbuf()) {} 1022 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1023 : __sbuf_(__s) {} 1024 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1025 : __sbuf_(__p.__sbuf_) {} 1026 1027 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1028 {return static_cast<char_type>(__sbuf_->sgetc());} 1029 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1030 { 1031 __sbuf_->sbumpc(); 1032 return *this; 1033 } 1034 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1035 { 1036 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1037 } 1038 1039 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1040 {return __test_for_eof() == __b.__test_for_eof();} 1041 }; 1042 1043 template <class _CharT, class _Traits> 1044 inline _LIBCPP_INLINE_VISIBILITY 1045 bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1046 const istreambuf_iterator<_CharT,_Traits>& __b) 1047 {return __a.equal(__b);} 1048 1049 template <class _CharT, class _Traits> 1050 inline _LIBCPP_INLINE_VISIBILITY 1051 bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1052 const istreambuf_iterator<_CharT,_Traits>& __b) 1053 {return !__a.equal(__b);} 1054 1055 template <class _CharT, class _Traits> 1056 class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1057 : public iterator<output_iterator_tag, void, void, void, void> 1058 { 1059 public: 1060 typedef _CharT char_type; 1061 typedef _Traits traits_type; 1062 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1063 typedef basic_ostream<_CharT,_Traits> ostream_type; 1064 private: 1065 streambuf_type* __sbuf_; 1066 public: 1067 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1068 : __sbuf_(__s.rdbuf()) {} 1069 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1070 : __sbuf_(__s) {} 1071 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1072 { 1073 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1074 __sbuf_ = 0; 1075 return *this; 1076 } 1077 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1078 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1079 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1080 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1081 1082 #if !defined(__APPLE__) || \ 1083 (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \ 1084 (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0) 1085 1086 template <class _Ch, class _Tr> 1087 friend 1088 _LIBCPP_HIDDEN 1089 ostreambuf_iterator<_Ch, _Tr> 1090 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1091 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1092 ios_base& __iob, _Ch __fl); 1093 #endif 1094 }; 1095 1096 template <class _Iter> 1097 class _LIBCPP_TEMPLATE_VIS move_iterator 1098 { 1099 private: 1100 _Iter __i; 1101 public: 1102 typedef _Iter iterator_type; 1103 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1104 typedef typename iterator_traits<iterator_type>::value_type value_type; 1105 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1106 typedef iterator_type pointer; 1107 #ifndef _LIBCPP_CXX03_LANG 1108 typedef typename iterator_traits<iterator_type>::reference __reference; 1109 typedef typename conditional< 1110 is_reference<__reference>::value, 1111 typename remove_reference<__reference>::type&&, 1112 __reference 1113 >::type reference; 1114 #else 1115 typedef typename iterator_traits<iterator_type>::reference reference; 1116 #endif 1117 1118 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1119 move_iterator() : __i() {} 1120 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1121 explicit move_iterator(_Iter __x) : __i(__x) {} 1122 template <class _Up> 1123 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1124 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1125 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1127 reference operator*() const { return static_cast<reference>(*__i); } 1128 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1129 pointer operator->() const { return __i;} 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--() {--__i; return *this;} 1136 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1137 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 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 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1144 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1145 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1146 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1147 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1148 }; 1149 1150 template <class _Iter1, class _Iter2> 1151 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1152 bool 1153 operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1154 { 1155 return __x.base() == __y.base(); 1156 } 1157 1158 template <class _Iter1, class _Iter2> 1159 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1160 bool 1161 operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1162 { 1163 return __x.base() < __y.base(); 1164 } 1165 1166 template <class _Iter1, class _Iter2> 1167 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1168 bool 1169 operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1170 { 1171 return __x.base() != __y.base(); 1172 } 1173 1174 template <class _Iter1, class _Iter2> 1175 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1176 bool 1177 operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1178 { 1179 return __x.base() > __y.base(); 1180 } 1181 1182 template <class _Iter1, class _Iter2> 1183 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1184 bool 1185 operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1186 { 1187 return __x.base() >= __y.base(); 1188 } 1189 1190 template <class _Iter1, class _Iter2> 1191 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1192 bool 1193 operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1194 { 1195 return __x.base() <= __y.base(); 1196 } 1197 1198 #ifndef _LIBCPP_CXX03_LANG 1199 template <class _Iter1, class _Iter2> 1200 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1201 auto 1202 operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1203 -> decltype(__x.base() - __y.base()) 1204 { 1205 return __x.base() - __y.base(); 1206 } 1207 #else 1208 template <class _Iter1, class _Iter2> 1209 inline _LIBCPP_INLINE_VISIBILITY 1210 typename move_iterator<_Iter1>::difference_type 1211 operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1212 { 1213 return __x.base() - __y.base(); 1214 } 1215 #endif 1216 1217 template <class _Iter> 1218 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1219 move_iterator<_Iter> 1220 operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1221 { 1222 return move_iterator<_Iter>(__x.base() + __n); 1223 } 1224 1225 template <class _Iter> 1226 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1227 move_iterator<_Iter> 1228 make_move_iterator(_Iter __i) 1229 { 1230 return move_iterator<_Iter>(__i); 1231 } 1232 1233 // __wrap_iter 1234 1235 template <class _Iter> class __wrap_iter; 1236 1237 template <class _Iter1, class _Iter2> 1238 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1239 bool 1240 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1241 1242 template <class _Iter1, class _Iter2> 1243 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1244 bool 1245 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1246 1247 template <class _Iter1, class _Iter2> 1248 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1249 bool 1250 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1251 1252 template <class _Iter1, class _Iter2> 1253 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1254 bool 1255 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1256 1257 template <class _Iter1, class _Iter2> 1258 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1259 bool 1260 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1261 1262 template <class _Iter1, class _Iter2> 1263 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1264 bool 1265 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1266 1267 #ifndef _LIBCPP_CXX03_LANG 1268 template <class _Iter1, class _Iter2> 1269 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1270 auto 1271 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1272 -> decltype(__x.base() - __y.base()); 1273 #else 1274 template <class _Iter1, class _Iter2> 1275 _LIBCPP_INLINE_VISIBILITY 1276 typename __wrap_iter<_Iter1>::difference_type 1277 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1278 #endif 1279 1280 template <class _Iter> 1281 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1282 __wrap_iter<_Iter> 1283 operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT_DEBUG; 1284 1285 template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY copy(_Ip, _Ip, _Op); 1286 template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2); 1287 template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1288 template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1289 1290 #if _LIBCPP_DEBUG_LEVEL < 2 1291 1292 template <class _Tp> 1293 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1294 typename enable_if 1295 < 1296 is_trivially_copy_assignable<_Tp>::value, 1297 _Tp* 1298 >::type 1299 __unwrap_iter(__wrap_iter<_Tp*>); 1300 1301 #else 1302 1303 template <class _Tp> 1304 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1305 typename enable_if 1306 < 1307 is_trivially_copy_assignable<_Tp>::value, 1308 __wrap_iter<_Tp*> 1309 >::type 1310 __unwrap_iter(__wrap_iter<_Tp*> __i); 1311 1312 #endif 1313 1314 template <class _Iter> 1315 class __wrap_iter 1316 { 1317 public: 1318 typedef _Iter iterator_type; 1319 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1320 typedef typename iterator_traits<iterator_type>::value_type value_type; 1321 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1322 typedef typename iterator_traits<iterator_type>::pointer pointer; 1323 typedef typename iterator_traits<iterator_type>::reference reference; 1324 private: 1325 iterator_type __i; 1326 public: 1327 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT_DEBUG 1328 #if _LIBCPP_STD_VER > 11 1329 : __i{} 1330 #endif 1331 { 1332 #if _LIBCPP_DEBUG_LEVEL >= 2 1333 __get_db()->__insert_i(this); 1334 #endif 1335 } 1336 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1337 __wrap_iter(const __wrap_iter<_Up>& __u, 1338 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT_DEBUG 1339 : __i(__u.base()) 1340 { 1341 #if _LIBCPP_DEBUG_LEVEL >= 2 1342 __get_db()->__iterator_copy(this, &__u); 1343 #endif 1344 } 1345 #if _LIBCPP_DEBUG_LEVEL >= 2 1346 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1347 __wrap_iter(const __wrap_iter& __x) 1348 : __i(__x.base()) 1349 { 1350 __get_db()->__iterator_copy(this, &__x); 1351 } 1352 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1353 __wrap_iter& operator=(const __wrap_iter& __x) 1354 { 1355 if (this != &__x) 1356 { 1357 __get_db()->__iterator_copy(this, &__x); 1358 __i = __x.__i; 1359 } 1360 return *this; 1361 } 1362 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1363 ~__wrap_iter() 1364 { 1365 __get_db()->__erase_i(this); 1366 } 1367 #endif 1368 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT_DEBUG 1369 { 1370 #if _LIBCPP_DEBUG_LEVEL >= 2 1371 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1372 "Attempted to dereference a non-dereferenceable iterator"); 1373 #endif 1374 return *__i; 1375 } 1376 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT_DEBUG 1377 { 1378 #if _LIBCPP_DEBUG_LEVEL >= 2 1379 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1380 "Attempted to dereference a non-dereferenceable iterator"); 1381 #endif 1382 return (pointer)_VSTD::addressof(*__i); 1383 } 1384 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT_DEBUG 1385 { 1386 #if _LIBCPP_DEBUG_LEVEL >= 2 1387 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1388 "Attempted to increment non-incrementable iterator"); 1389 #endif 1390 ++__i; 1391 return *this; 1392 } 1393 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT_DEBUG 1394 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1395 1396 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT_DEBUG 1397 { 1398 #if _LIBCPP_DEBUG_LEVEL >= 2 1399 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1400 "Attempted to decrement non-decrementable iterator"); 1401 #endif 1402 --__i; 1403 return *this; 1404 } 1405 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT_DEBUG 1406 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1407 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT_DEBUG 1408 {__wrap_iter __w(*this); __w += __n; return __w;} 1409 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT_DEBUG 1410 { 1411 #if _LIBCPP_DEBUG_LEVEL >= 2 1412 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1413 "Attempted to add/subtract iterator outside of valid range"); 1414 #endif 1415 __i += __n; 1416 return *this; 1417 } 1418 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT_DEBUG 1419 {return *this + (-__n);} 1420 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT_DEBUG 1421 {*this += -__n; return *this;} 1422 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT_DEBUG 1423 { 1424 #if _LIBCPP_DEBUG_LEVEL >= 2 1425 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1426 "Attempted to subscript iterator outside of valid range"); 1427 #endif 1428 return __i[__n]; 1429 } 1430 1431 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT_DEBUG {return __i;} 1432 1433 private: 1434 #if _LIBCPP_DEBUG_LEVEL >= 2 1435 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1436 { 1437 __get_db()->__insert_ic(this, __p); 1438 } 1439 #else 1440 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT_DEBUG : __i(__x) {} 1441 #endif 1442 1443 template <class _Up> friend class __wrap_iter; 1444 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1445 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1446 template <class _Tp, ptrdiff_t> friend class _LIBCPP_TEMPLATE_VIS span; 1447 1448 template <class _Iter1, class _Iter2> 1449 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1450 bool 1451 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1452 1453 template <class _Iter1, class _Iter2> 1454 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1455 bool 1456 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1457 1458 template <class _Iter1, class _Iter2> 1459 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1460 bool 1461 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1462 1463 template <class _Iter1, class _Iter2> 1464 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1465 bool 1466 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1467 1468 template <class _Iter1, class _Iter2> 1469 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1470 bool 1471 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1472 1473 template <class _Iter1, class _Iter2> 1474 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1475 bool 1476 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1477 1478 #ifndef _LIBCPP_CXX03_LANG 1479 template <class _Iter1, class _Iter2> 1480 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1481 auto 1482 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1483 -> decltype(__x.base() - __y.base()); 1484 #else 1485 template <class _Iter1, class _Iter2> 1486 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1487 typename __wrap_iter<_Iter1>::difference_type 1488 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1489 #endif 1490 1491 template <class _Iter1> 1492 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1493 __wrap_iter<_Iter1> 1494 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT_DEBUG; 1495 1496 template <class _Ip, class _Op> friend _Op copy(_Ip, _Ip, _Op); 1497 template <class _B1, class _B2> friend _B2 copy_backward(_B1, _B1, _B2); 1498 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1499 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1500 1501 #if _LIBCPP_DEBUG_LEVEL < 2 1502 template <class _Tp> 1503 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1504 typename enable_if 1505 < 1506 is_trivially_copy_assignable<_Tp>::value, 1507 _Tp* 1508 >::type 1509 __unwrap_iter(__wrap_iter<_Tp*>); 1510 #else 1511 template <class _Tp> 1512 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1513 typename enable_if 1514 < 1515 is_trivially_copy_assignable<_Tp>::value, 1516 __wrap_iter<_Tp*> 1517 >::type 1518 __unwrap_iter(__wrap_iter<_Tp*> __i); 1519 #endif 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_DEBUG 1526 { 1527 return __x.base() == __y.base(); 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_DEBUG 1534 { 1535 #if _LIBCPP_DEBUG_LEVEL >= 2 1536 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1537 "Attempted to compare incomparable iterators"); 1538 #endif 1539 return __x.base() < __y.base(); 1540 } 1541 1542 template <class _Iter1, class _Iter2> 1543 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1544 bool 1545 operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1546 { 1547 return !(__x == __y); 1548 } 1549 1550 template <class _Iter1, class _Iter2> 1551 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1552 bool 1553 operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1554 { 1555 return __y < __x; 1556 } 1557 1558 template <class _Iter1, class _Iter2> 1559 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1560 bool 1561 operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1562 { 1563 return !(__x < __y); 1564 } 1565 1566 template <class _Iter1, class _Iter2> 1567 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1568 bool 1569 operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1570 { 1571 return !(__y < __x); 1572 } 1573 1574 template <class _Iter1> 1575 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1576 bool 1577 operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1578 { 1579 return !(__x == __y); 1580 } 1581 1582 template <class _Iter1> 1583 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1584 bool 1585 operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1586 { 1587 return __y < __x; 1588 } 1589 1590 template <class _Iter1> 1591 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1592 bool 1593 operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1594 { 1595 return !(__x < __y); 1596 } 1597 1598 template <class _Iter1> 1599 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1600 bool 1601 operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1602 { 1603 return !(__y < __x); 1604 } 1605 1606 #ifndef _LIBCPP_CXX03_LANG 1607 template <class _Iter1, class _Iter2> 1608 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1609 auto 1610 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1611 -> decltype(__x.base() - __y.base()) 1612 { 1613 #if _LIBCPP_DEBUG_LEVEL >= 2 1614 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1615 "Attempted to subtract incompatible iterators"); 1616 #endif 1617 return __x.base() - __y.base(); 1618 } 1619 #else 1620 template <class _Iter1, class _Iter2> 1621 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1622 typename __wrap_iter<_Iter1>::difference_type 1623 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1624 { 1625 #if _LIBCPP_DEBUG_LEVEL >= 2 1626 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1627 "Attempted to subtract incompatible iterators"); 1628 #endif 1629 return __x.base() - __y.base(); 1630 } 1631 #endif 1632 1633 template <class _Iter> 1634 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1635 __wrap_iter<_Iter> 1636 operator+(typename __wrap_iter<_Iter>::difference_type __n, 1637 __wrap_iter<_Iter> __x) _NOEXCEPT_DEBUG 1638 { 1639 __x += __n; 1640 return __x; 1641 } 1642 1643 template <class _Iter> 1644 struct __libcpp_is_trivial_iterator 1645 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1646 1647 template <class _Iter> 1648 struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1649 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1650 1651 template <class _Iter> 1652 struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1653 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1654 1655 template <class _Iter> 1656 struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1657 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1658 1659 1660 template <class _Tp, size_t _Np> 1661 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1662 _Tp* 1663 begin(_Tp (&__array)[_Np]) 1664 { 1665 return __array; 1666 } 1667 1668 template <class _Tp, size_t _Np> 1669 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1670 _Tp* 1671 end(_Tp (&__array)[_Np]) 1672 { 1673 return __array + _Np; 1674 } 1675 1676 #if !defined(_LIBCPP_CXX03_LANG) 1677 1678 template <class _Cp> 1679 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1680 auto 1681 begin(_Cp& __c) -> decltype(__c.begin()) 1682 { 1683 return __c.begin(); 1684 } 1685 1686 template <class _Cp> 1687 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1688 auto 1689 begin(const _Cp& __c) -> decltype(__c.begin()) 1690 { 1691 return __c.begin(); 1692 } 1693 1694 template <class _Cp> 1695 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1696 auto 1697 end(_Cp& __c) -> decltype(__c.end()) 1698 { 1699 return __c.end(); 1700 } 1701 1702 template <class _Cp> 1703 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1704 auto 1705 end(const _Cp& __c) -> decltype(__c.end()) 1706 { 1707 return __c.end(); 1708 } 1709 1710 #if _LIBCPP_STD_VER > 11 1711 1712 template <class _Tp, size_t _Np> 1713 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1714 reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1715 { 1716 return reverse_iterator<_Tp*>(__array + _Np); 1717 } 1718 1719 template <class _Tp, size_t _Np> 1720 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1721 reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1722 { 1723 return reverse_iterator<_Tp*>(__array); 1724 } 1725 1726 template <class _Ep> 1727 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1728 reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1729 { 1730 return reverse_iterator<const _Ep*>(__il.end()); 1731 } 1732 1733 template <class _Ep> 1734 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1735 reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1736 { 1737 return reverse_iterator<const _Ep*>(__il.begin()); 1738 } 1739 1740 template <class _Cp> 1741 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1742 auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1743 { 1744 return _VSTD::begin(__c); 1745 } 1746 1747 template <class _Cp> 1748 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1749 auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1750 { 1751 return _VSTD::end(__c); 1752 } 1753 1754 template <class _Cp> 1755 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1756 auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1757 { 1758 return __c.rbegin(); 1759 } 1760 1761 template <class _Cp> 1762 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1763 auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1764 { 1765 return __c.rbegin(); 1766 } 1767 1768 template <class _Cp> 1769 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1770 auto rend(_Cp& __c) -> decltype(__c.rend()) 1771 { 1772 return __c.rend(); 1773 } 1774 1775 template <class _Cp> 1776 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1777 auto rend(const _Cp& __c) -> decltype(__c.rend()) 1778 { 1779 return __c.rend(); 1780 } 1781 1782 template <class _Cp> 1783 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1784 auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1785 { 1786 return _VSTD::rbegin(__c); 1787 } 1788 1789 template <class _Cp> 1790 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1791 auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1792 { 1793 return _VSTD::rend(__c); 1794 } 1795 1796 #endif 1797 1798 1799 #else // defined(_LIBCPP_CXX03_LANG) 1800 1801 template <class _Cp> 1802 inline _LIBCPP_INLINE_VISIBILITY 1803 typename _Cp::iterator 1804 begin(_Cp& __c) 1805 { 1806 return __c.begin(); 1807 } 1808 1809 template <class _Cp> 1810 inline _LIBCPP_INLINE_VISIBILITY 1811 typename _Cp::const_iterator 1812 begin(const _Cp& __c) 1813 { 1814 return __c.begin(); 1815 } 1816 1817 template <class _Cp> 1818 inline _LIBCPP_INLINE_VISIBILITY 1819 typename _Cp::iterator 1820 end(_Cp& __c) 1821 { 1822 return __c.end(); 1823 } 1824 1825 template <class _Cp> 1826 inline _LIBCPP_INLINE_VISIBILITY 1827 typename _Cp::const_iterator 1828 end(const _Cp& __c) 1829 { 1830 return __c.end(); 1831 } 1832 1833 #endif // !defined(_LIBCPP_CXX03_LANG) 1834 1835 #if _LIBCPP_STD_VER > 14 1836 1837 // #if _LIBCPP_STD_VER > 11 1838 // template <> 1839 // struct _LIBCPP_TEMPLATE_VIS plus<void> 1840 // { 1841 // template <class _T1, class _T2> 1842 // _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1843 // auto operator()(_T1&& __t, _T2&& __u) const 1844 // _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1845 // -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1846 // { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1847 // typedef void is_transparent; 1848 // }; 1849 // #endif 1850 1851 template <class _Cont> 1852 inline _LIBCPP_INLINE_VISIBILITY 1853 constexpr auto size(const _Cont& __c) 1854 _NOEXCEPT_(noexcept(__c.size())) 1855 -> decltype (__c.size()) 1856 { return __c.size(); } 1857 1858 template <class _Tp, size_t _Sz> 1859 inline _LIBCPP_INLINE_VISIBILITY 1860 constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1861 1862 template <class _Cont> 1863 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1864 constexpr auto empty(const _Cont& __c) 1865 _NOEXCEPT_(noexcept(__c.empty())) 1866 -> decltype (__c.empty()) 1867 { return __c.empty(); } 1868 1869 template <class _Tp, size_t _Sz> 1870 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1871 constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1872 1873 template <class _Ep> 1874 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1875 constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1876 1877 template <class _Cont> constexpr 1878 inline _LIBCPP_INLINE_VISIBILITY 1879 auto data(_Cont& __c) 1880 _NOEXCEPT_(noexcept(__c.data())) 1881 -> decltype (__c.data()) 1882 { return __c.data(); } 1883 1884 template <class _Cont> constexpr 1885 inline _LIBCPP_INLINE_VISIBILITY 1886 auto data(const _Cont& __c) 1887 _NOEXCEPT_(noexcept(__c.data())) 1888 -> decltype (__c.data()) 1889 { return __c.data(); } 1890 1891 template <class _Tp, size_t _Sz> 1892 inline _LIBCPP_INLINE_VISIBILITY 1893 constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1894 1895 template <class _Ep> 1896 inline _LIBCPP_INLINE_VISIBILITY 1897 constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1898 #endif 1899 1900 1901 _LIBCPP_END_NAMESPACE_STD 1902 1903 #endif // _LIBCPP_ITERATOR 1904
