1// -*- C++ -*- 2//===-------------------------- algorithm ---------------------------------===// 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_ALGORITHM 12#define _LIBCPP_ALGORITHM 13 14/* 15 algorithm synopsis 16 17#include <initializer_list> 18 19namespace std 20{ 21 22template <class InputIterator, class Predicate> 23 bool 24 all_of(InputIterator first, InputIterator last, Predicate pred); 25 26template <class InputIterator, class Predicate> 27 bool 28 any_of(InputIterator first, InputIterator last, Predicate pred); 29 30template <class InputIterator, class Predicate> 31 bool 32 none_of(InputIterator first, InputIterator last, Predicate pred); 33 34template <class InputIterator, class Function> 35 Function 36 for_each(InputIterator first, InputIterator last, Function f); 37 38template <class InputIterator, class T> 39 InputIterator 40 find(InputIterator first, InputIterator last, const T& value); 41 42template <class InputIterator, class Predicate> 43 InputIterator 44 find_if(InputIterator first, InputIterator last, Predicate pred); 45 46template<class InputIterator, class Predicate> 47 InputIterator 48 find_if_not(InputIterator first, InputIterator last, Predicate pred); 49 50template <class ForwardIterator1, class ForwardIterator2> 51 ForwardIterator1 52 find_end(ForwardIterator1 first1, ForwardIterator1 last1, 53 ForwardIterator2 first2, ForwardIterator2 last2); 54 55template <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 56 ForwardIterator1 57 find_end(ForwardIterator1 first1, ForwardIterator1 last1, 58 ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred); 59 60template <class ForwardIterator1, class ForwardIterator2> 61 ForwardIterator1 62 find_first_of(ForwardIterator1 first1, ForwardIterator1 last1, 63 ForwardIterator2 first2, ForwardIterator2 last2); 64 65template <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 66 ForwardIterator1 67 find_first_of(ForwardIterator1 first1, ForwardIterator1 last1, 68 ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred); 69 70template <class ForwardIterator> 71 ForwardIterator 72 adjacent_find(ForwardIterator first, ForwardIterator last); 73 74template <class ForwardIterator, class BinaryPredicate> 75 ForwardIterator 76 adjacent_find(ForwardIterator first, ForwardIterator last, BinaryPredicate pred); 77 78template <class InputIterator, class T> 79 typename iterator_traits<InputIterator>::difference_type 80 count(InputIterator first, InputIterator last, const T& value); 81 82template <class InputIterator, class Predicate> 83 typename iterator_traits<InputIterator>::difference_type 84 count_if(InputIterator first, InputIterator last, Predicate pred); 85 86template <class InputIterator1, class InputIterator2> 87 pair<InputIterator1, InputIterator2> 88 mismatch(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2); 89 90template <class InputIterator1, class InputIterator2> 91 pair<InputIterator1, InputIterator2> 92 mismatch(InputIterator1 first1, InputIterator1 last1, 93 InputIterator2 first2, InputIterator2 last2); // **C++14** 94 95template <class InputIterator1, class InputIterator2, class BinaryPredicate> 96 pair<InputIterator1, InputIterator2> 97 mismatch(InputIterator1 first1, InputIterator1 last1, 98 InputIterator2 first2, BinaryPredicate pred); 99 100template <class InputIterator1, class InputIterator2, class BinaryPredicate> 101 pair<InputIterator1, InputIterator2> 102 mismatch(InputIterator1 first1, InputIterator1 last1, 103 InputIterator2 first2, InputIterator2 last2, 104 BinaryPredicate pred); // **C++14** 105 106template <class InputIterator1, class InputIterator2> 107 bool 108 equal(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2); 109 110template <class InputIterator1, class InputIterator2> 111 bool 112 equal(InputIterator1 first1, InputIterator1 last1, 113 InputIterator2 first2, InputIterator2 last2); // **C++14** 114 115template <class InputIterator1, class InputIterator2, class BinaryPredicate> 116 bool 117 equal(InputIterator1 first1, InputIterator1 last1, 118 InputIterator2 first2, BinaryPredicate pred); 119 120template <class InputIterator1, class InputIterator2, class BinaryPredicate> 121 bool 122 equal(InputIterator1 first1, InputIterator1 last1, 123 InputIterator2 first2, InputIterator2 last2, 124 BinaryPredicate pred); // **C++14** 125 126template<class ForwardIterator1, class ForwardIterator2> 127 bool 128 is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 129 ForwardIterator2 first2); 130 131template<class ForwardIterator1, class ForwardIterator2> 132 bool 133 is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 134 ForwardIterator2 first2, ForwardIterator2 last2); // **C++14** 135 136template<class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 137 bool 138 is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 139 ForwardIterator2 first2, BinaryPredicate pred); 140 141template<class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 142 bool 143 is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 144 ForwardIterator2 first2, ForwardIterator2 last2, 145 BinaryPredicate pred); // **C++14** 146 147template <class ForwardIterator1, class ForwardIterator2> 148 ForwardIterator1 149 search(ForwardIterator1 first1, ForwardIterator1 last1, 150 ForwardIterator2 first2, ForwardIterator2 last2); 151 152template <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 153 ForwardIterator1 154 search(ForwardIterator1 first1, ForwardIterator1 last1, 155 ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred); 156 157template <class ForwardIterator, class Size, class T> 158 ForwardIterator 159 search_n(ForwardIterator first, ForwardIterator last, Size count, const T& value); 160 161template <class ForwardIterator, class Size, class T, class BinaryPredicate> 162 ForwardIterator 163 search_n(ForwardIterator first, ForwardIterator last, 164 Size count, const T& value, BinaryPredicate pred); 165 166template <class InputIterator, class OutputIterator> 167 OutputIterator 168 copy(InputIterator first, InputIterator last, OutputIterator result); 169 170template<class InputIterator, class OutputIterator, class Predicate> 171 OutputIterator 172 copy_if(InputIterator first, InputIterator last, 173 OutputIterator result, Predicate pred); 174 175template<class InputIterator, class Size, class OutputIterator> 176 OutputIterator 177 copy_n(InputIterator first, Size n, OutputIterator result); 178 179template <class BidirectionalIterator1, class BidirectionalIterator2> 180 BidirectionalIterator2 181 copy_backward(BidirectionalIterator1 first, BidirectionalIterator1 last, 182 BidirectionalIterator2 result); 183 184template <class ForwardIterator1, class ForwardIterator2> 185 ForwardIterator2 186 swap_ranges(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2); 187 188template <class ForwardIterator1, class ForwardIterator2> 189 void 190 iter_swap(ForwardIterator1 a, ForwardIterator2 b); 191 192template <class InputIterator, class OutputIterator, class UnaryOperation> 193 OutputIterator 194 transform(InputIterator first, InputIterator last, OutputIterator result, UnaryOperation op); 195 196template <class InputIterator1, class InputIterator2, class OutputIterator, class BinaryOperation> 197 OutputIterator 198 transform(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, 199 OutputIterator result, BinaryOperation binary_op); 200 201template <class ForwardIterator, class T> 202 void 203 replace(ForwardIterator first, ForwardIterator last, const T& old_value, const T& new_value); 204 205template <class ForwardIterator, class Predicate, class T> 206 void 207 replace_if(ForwardIterator first, ForwardIterator last, Predicate pred, const T& new_value); 208 209template <class InputIterator, class OutputIterator, class T> 210 OutputIterator 211 replace_copy(InputIterator first, InputIterator last, OutputIterator result, 212 const T& old_value, const T& new_value); 213 214template <class InputIterator, class OutputIterator, class Predicate, class T> 215 OutputIterator 216 replace_copy_if(InputIterator first, InputIterator last, OutputIterator result, Predicate pred, const T& new_value); 217 218template <class ForwardIterator, class T> 219 void 220 fill(ForwardIterator first, ForwardIterator last, const T& value); 221 222template <class OutputIterator, class Size, class T> 223 OutputIterator 224 fill_n(OutputIterator first, Size n, const T& value); 225 226template <class ForwardIterator, class Generator> 227 void 228 generate(ForwardIterator first, ForwardIterator last, Generator gen); 229 230template <class OutputIterator, class Size, class Generator> 231 OutputIterator 232 generate_n(OutputIterator first, Size n, Generator gen); 233 234template <class ForwardIterator, class T> 235 ForwardIterator 236 remove(ForwardIterator first, ForwardIterator last, const T& value); 237 238template <class ForwardIterator, class Predicate> 239 ForwardIterator 240 remove_if(ForwardIterator first, ForwardIterator last, Predicate pred); 241 242template <class InputIterator, class OutputIterator, class T> 243 OutputIterator 244 remove_copy(InputIterator first, InputIterator last, OutputIterator result, const T& value); 245 246template <class InputIterator, class OutputIterator, class Predicate> 247 OutputIterator 248 remove_copy_if(InputIterator first, InputIterator last, OutputIterator result, Predicate pred); 249 250template <class ForwardIterator> 251 ForwardIterator 252 unique(ForwardIterator first, ForwardIterator last); 253 254template <class ForwardIterator, class BinaryPredicate> 255 ForwardIterator 256 unique(ForwardIterator first, ForwardIterator last, BinaryPredicate pred); 257 258template <class InputIterator, class OutputIterator> 259 OutputIterator 260 unique_copy(InputIterator first, InputIterator last, OutputIterator result); 261 262template <class InputIterator, class OutputIterator, class BinaryPredicate> 263 OutputIterator 264 unique_copy(InputIterator first, InputIterator last, OutputIterator result, BinaryPredicate pred); 265 266template <class BidirectionalIterator> 267 void 268 reverse(BidirectionalIterator first, BidirectionalIterator last); 269 270template <class BidirectionalIterator, class OutputIterator> 271 OutputIterator 272 reverse_copy(BidirectionalIterator first, BidirectionalIterator last, OutputIterator result); 273 274template <class ForwardIterator> 275 ForwardIterator 276 rotate(ForwardIterator first, ForwardIterator middle, ForwardIterator last); 277 278template <class ForwardIterator, class OutputIterator> 279 OutputIterator 280 rotate_copy(ForwardIterator first, ForwardIterator middle, ForwardIterator last, OutputIterator result); 281 282template <class RandomAccessIterator> 283 void 284 random_shuffle(RandomAccessIterator first, RandomAccessIterator last); // deprecated in C++14 285 286template <class RandomAccessIterator, class RandomNumberGenerator> 287 void 288 random_shuffle(RandomAccessIterator first, RandomAccessIterator last, 289 RandomNumberGenerator& rand); // deprecated in C++14 290 291template<class RandomAccessIterator, class UniformRandomNumberGenerator> 292 void shuffle(RandomAccessIterator first, RandomAccessIterator last, 293 UniformRandomNumberGenerator&& g); 294 295template <class InputIterator, class Predicate> 296 bool 297 is_partitioned(InputIterator first, InputIterator last, Predicate pred); 298 299template <class ForwardIterator, class Predicate> 300 ForwardIterator 301 partition(ForwardIterator first, ForwardIterator last, Predicate pred); 302 303template <class InputIterator, class OutputIterator1, 304 class OutputIterator2, class Predicate> 305 pair<OutputIterator1, OutputIterator2> 306 partition_copy(InputIterator first, InputIterator last, 307 OutputIterator1 out_true, OutputIterator2 out_false, 308 Predicate pred); 309 310template <class ForwardIterator, class Predicate> 311 ForwardIterator 312 stable_partition(ForwardIterator first, ForwardIterator last, Predicate pred); 313 314template<class ForwardIterator, class Predicate> 315 ForwardIterator 316 partition_point(ForwardIterator first, ForwardIterator last, Predicate pred); 317 318template <class ForwardIterator> 319 bool 320 is_sorted(ForwardIterator first, ForwardIterator last); 321 322template <class ForwardIterator, class Compare> 323 bool 324 is_sorted(ForwardIterator first, ForwardIterator last, Compare comp); 325 326template<class ForwardIterator> 327 ForwardIterator 328 is_sorted_until(ForwardIterator first, ForwardIterator last); 329 330template <class ForwardIterator, class Compare> 331 ForwardIterator 332 is_sorted_until(ForwardIterator first, ForwardIterator last, Compare comp); 333 334template <class RandomAccessIterator> 335 void 336 sort(RandomAccessIterator first, RandomAccessIterator last); 337 338template <class RandomAccessIterator, class Compare> 339 void 340 sort(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 341 342template <class RandomAccessIterator> 343 void 344 stable_sort(RandomAccessIterator first, RandomAccessIterator last); 345 346template <class RandomAccessIterator, class Compare> 347 void 348 stable_sort(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 349 350template <class RandomAccessIterator> 351 void 352 partial_sort(RandomAccessIterator first, RandomAccessIterator middle, RandomAccessIterator last); 353 354template <class RandomAccessIterator, class Compare> 355 void 356 partial_sort(RandomAccessIterator first, RandomAccessIterator middle, RandomAccessIterator last, Compare comp); 357 358template <class InputIterator, class RandomAccessIterator> 359 RandomAccessIterator 360 partial_sort_copy(InputIterator first, InputIterator last, 361 RandomAccessIterator result_first, RandomAccessIterator result_last); 362 363template <class InputIterator, class RandomAccessIterator, class Compare> 364 RandomAccessIterator 365 partial_sort_copy(InputIterator first, InputIterator last, 366 RandomAccessIterator result_first, RandomAccessIterator result_last, Compare comp); 367 368template <class RandomAccessIterator> 369 void 370 nth_element(RandomAccessIterator first, RandomAccessIterator nth, RandomAccessIterator last); 371 372template <class RandomAccessIterator, class Compare> 373 void 374 nth_element(RandomAccessIterator first, RandomAccessIterator nth, RandomAccessIterator last, Compare comp); 375 376template <class ForwardIterator, class T> 377 ForwardIterator 378 lower_bound(ForwardIterator first, ForwardIterator last, const T& value); 379 380template <class ForwardIterator, class T, class Compare> 381 ForwardIterator 382 lower_bound(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 383 384template <class ForwardIterator, class T> 385 ForwardIterator 386 upper_bound(ForwardIterator first, ForwardIterator last, const T& value); 387 388template <class ForwardIterator, class T, class Compare> 389 ForwardIterator 390 upper_bound(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 391 392template <class ForwardIterator, class T> 393 pair<ForwardIterator, ForwardIterator> 394 equal_range(ForwardIterator first, ForwardIterator last, const T& value); 395 396template <class ForwardIterator, class T, class Compare> 397 pair<ForwardIterator, ForwardIterator> 398 equal_range(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 399 400template <class ForwardIterator, class T> 401 bool 402 binary_search(ForwardIterator first, ForwardIterator last, const T& value); 403 404template <class ForwardIterator, class T, class Compare> 405 bool 406 binary_search(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 407 408template <class InputIterator1, class InputIterator2, class OutputIterator> 409 OutputIterator 410 merge(InputIterator1 first1, InputIterator1 last1, 411 InputIterator2 first2, InputIterator2 last2, OutputIterator result); 412 413template <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 414 OutputIterator 415 merge(InputIterator1 first1, InputIterator1 last1, 416 InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 417 418template <class BidirectionalIterator> 419 void 420 inplace_merge(BidirectionalIterator first, BidirectionalIterator middle, BidirectionalIterator last); 421 422template <class BidirectionalIterator, class Compare> 423 void 424 inplace_merge(BidirectionalIterator first, BidirectionalIterator middle, BidirectionalIterator last, Compare comp); 425 426template <class InputIterator1, class InputIterator2> 427 bool 428 includes(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2); 429 430template <class InputIterator1, class InputIterator2, class Compare> 431 bool 432 includes(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, Compare comp); 433 434template <class InputIterator1, class InputIterator2, class OutputIterator> 435 OutputIterator 436 set_union(InputIterator1 first1, InputIterator1 last1, 437 InputIterator2 first2, InputIterator2 last2, OutputIterator result); 438 439template <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 440 OutputIterator 441 set_union(InputIterator1 first1, InputIterator1 last1, 442 InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 443 444template <class InputIterator1, class InputIterator2, class OutputIterator> 445 OutputIterator 446 set_intersection(InputIterator1 first1, InputIterator1 last1, 447 InputIterator2 first2, InputIterator2 last2, OutputIterator result); 448 449template <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 450 OutputIterator 451 set_intersection(InputIterator1 first1, InputIterator1 last1, 452 InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 453 454template <class InputIterator1, class InputIterator2, class OutputIterator> 455 OutputIterator 456 set_difference(InputIterator1 first1, InputIterator1 last1, 457 InputIterator2 first2, InputIterator2 last2, OutputIterator result); 458 459template <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 460 OutputIterator 461 set_difference(InputIterator1 first1, InputIterator1 last1, 462 InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 463 464template <class InputIterator1, class InputIterator2, class OutputIterator> 465 OutputIterator 466 set_symmetric_difference(InputIterator1 first1, InputIterator1 last1, 467 InputIterator2 first2, InputIterator2 last2, OutputIterator result); 468 469template <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 470 OutputIterator 471 set_symmetric_difference(InputIterator1 first1, InputIterator1 last1, 472 InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 473 474template <class RandomAccessIterator> 475 void 476 push_heap(RandomAccessIterator first, RandomAccessIterator last); 477 478template <class RandomAccessIterator, class Compare> 479 void 480 push_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 481 482template <class RandomAccessIterator> 483 void 484 pop_heap(RandomAccessIterator first, RandomAccessIterator last); 485 486template <class RandomAccessIterator, class Compare> 487 void 488 pop_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 489 490template <class RandomAccessIterator> 491 void 492 make_heap(RandomAccessIterator first, RandomAccessIterator last); 493 494template <class RandomAccessIterator, class Compare> 495 void 496 make_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 497 498template <class RandomAccessIterator> 499 void 500 sort_heap(RandomAccessIterator first, RandomAccessIterator last); 501 502template <class RandomAccessIterator, class Compare> 503 void 504 sort_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 505 506template <class RandomAccessIterator> 507 bool 508 is_heap(RandomAccessIterator first, RandomAccessiterator last); 509 510template <class RandomAccessIterator, class Compare> 511 bool 512 is_heap(RandomAccessIterator first, RandomAccessiterator last, Compare comp); 513 514template <class RandomAccessIterator> 515 RandomAccessIterator 516 is_heap_until(RandomAccessIterator first, RandomAccessiterator last); 517 518template <class RandomAccessIterator, class Compare> 519 RandomAccessIterator 520 is_heap_until(RandomAccessIterator first, RandomAccessiterator last, Compare comp); 521 522template <class ForwardIterator> 523 ForwardIterator 524 min_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14 525 526template <class ForwardIterator, class Compare> 527 ForwardIterator 528 min_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14 529 530template <class T> 531 const T& 532 min(const T& a, const T& b); // constexpr in C++14 533 534template <class T, class Compare> 535 const T& 536 min(const T& a, const T& b, Compare comp); // constexpr in C++14 537 538template<class T> 539 T 540 min(initializer_list<T> t); // constexpr in C++14 541 542template<class T, class Compare> 543 T 544 min(initializer_list<T> t, Compare comp); // constexpr in C++14 545 546template <class ForwardIterator> 547 ForwardIterator 548 max_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14 549 550template <class ForwardIterator, class Compare> 551 ForwardIterator 552 max_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14 553 554template <class T> 555 const T& 556 max(const T& a, const T& b); // constexpr in C++14 557 558template <class T, class Compare> 559 const T& 560 max(const T& a, const T& b, Compare comp); // constexpr in C++14 561 562template<class T> 563 T 564 max(initializer_list<T> t); // constexpr in C++14 565 566template<class T, class Compare> 567 T 568 max(initializer_list<T> t, Compare comp); // constexpr in C++14 569 570template<class ForwardIterator> 571 pair<ForwardIterator, ForwardIterator> 572 minmax_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14 573 574template<class ForwardIterator, class Compare> 575 pair<ForwardIterator, ForwardIterator> 576 minmax_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14 577 578template<class T> 579 pair<const T&, const T&> 580 minmax(const T& a, const T& b); // constexpr in C++14 581 582template<class T, class Compare> 583 pair<const T&, const T&> 584 minmax(const T& a, const T& b, Compare comp); // constexpr in C++14 585 586template<class T> 587 pair<T, T> 588 minmax(initializer_list<T> t); // constexpr in C++14 589 590template<class T, class Compare> 591 pair<T, T> 592 minmax(initializer_list<T> t, Compare comp); // constexpr in C++14 593 594template <class InputIterator1, class InputIterator2> 595 bool 596 lexicographical_compare(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2); 597 598template <class InputIterator1, class InputIterator2, class Compare> 599 bool 600 lexicographical_compare(InputIterator1 first1, InputIterator1 last1, 601 InputIterator2 first2, InputIterator2 last2, Compare comp); 602 603template <class BidirectionalIterator> 604 bool 605 next_permutation(BidirectionalIterator first, BidirectionalIterator last); 606 607template <class BidirectionalIterator, class Compare> 608 bool 609 next_permutation(BidirectionalIterator first, BidirectionalIterator last, Compare comp); 610 611template <class BidirectionalIterator> 612 bool 613 prev_permutation(BidirectionalIterator first, BidirectionalIterator last); 614 615template <class BidirectionalIterator, class Compare> 616 bool 617 prev_permutation(BidirectionalIterator first, BidirectionalIterator last, Compare comp); 618 619} // std 620 621*/ 622 623#include <__config> 624#include <initializer_list> 625#include <type_traits> 626#include <cstring> 627#include <utility> 628#include <memory> 629#include <iterator> 630#include <cstddef> 631 632#if defined(__IBMCPP__) 633#include "support/ibm/support.h" 634#endif 635#if defined(_LIBCPP_MSVCRT) || defined(__MINGW32__) 636#include "support/win32/support.h" 637#endif 638 639#include <__undef_min_max> 640 641#include <__debug> 642 643#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 644#pragma GCC system_header 645#endif 646 647_LIBCPP_BEGIN_NAMESPACE_STD 648 649// I'd like to replace these with _VSTD::equal_to<void>, but can't because: 650// * That only works with C++14 and later, and 651// * We haven't included <functional> here. 652template <class _T1, class _T2 = _T1> 653struct __equal_to 654{ 655 _LIBCPP_INLINE_VISIBILITY bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 656 _LIBCPP_INLINE_VISIBILITY bool operator()(const _T1& __x, const _T2& __y) const {return __x == __y;} 657 _LIBCPP_INLINE_VISIBILITY bool operator()(const _T2& __x, const _T1& __y) const {return __x == __y;} 658 _LIBCPP_INLINE_VISIBILITY bool operator()(const _T2& __x, const _T2& __y) const {return __x == __y;} 659}; 660 661template <class _T1> 662struct __equal_to<_T1, _T1> 663{ 664 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 665 bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 666}; 667 668template <class _T1> 669struct __equal_to<const _T1, _T1> 670{ 671 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 672 bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 673}; 674 675template <class _T1> 676struct __equal_to<_T1, const _T1> 677{ 678 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 679 bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 680}; 681 682template <class _T1, class _T2 = _T1> 683struct __less 684{ 685 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 686 bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 687 688 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 689 bool operator()(const _T1& __x, const _T2& __y) const {return __x < __y;} 690 691 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 692 bool operator()(const _T2& __x, const _T1& __y) const {return __x < __y;} 693 694 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 695 bool operator()(const _T2& __x, const _T2& __y) const {return __x < __y;} 696}; 697 698template <class _T1> 699struct __less<_T1, _T1> 700{ 701 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 702 bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 703}; 704 705template <class _T1> 706struct __less<const _T1, _T1> 707{ 708 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 709 bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 710}; 711 712template <class _T1> 713struct __less<_T1, const _T1> 714{ 715 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 716 bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 717}; 718 719template <class _Predicate> 720class __negate 721{ 722private: 723 _Predicate __p_; 724public: 725 _LIBCPP_INLINE_VISIBILITY __negate() {} 726 727 _LIBCPP_INLINE_VISIBILITY 728 explicit __negate(_Predicate __p) : __p_(__p) {} 729 730 template <class _T1> 731 _LIBCPP_INLINE_VISIBILITY 732 bool operator()(const _T1& __x) {return !__p_(__x);} 733 734 template <class _T1, class _T2> 735 _LIBCPP_INLINE_VISIBILITY 736 bool operator()(const _T1& __x, const _T2& __y) {return !__p_(__x, __y);} 737}; 738 739#ifdef _LIBCPP_DEBUG 740 741template <class _Compare> 742struct __debug_less 743{ 744 _Compare __comp_; 745 __debug_less(_Compare& __c) : __comp_(__c) {} 746 template <class _Tp, class _Up> 747 bool operator()(const _Tp& __x, const _Up& __y) 748 { 749 bool __r = __comp_(__x, __y); 750 if (__r) 751 _LIBCPP_ASSERT(!__comp_(__y, __x), "Comparator does not induce a strict weak ordering"); 752 return __r; 753 } 754}; 755 756#endif // _LIBCPP_DEBUG 757 758// Precondition: __x != 0 759inline _LIBCPP_INLINE_VISIBILITY 760unsigned 761__ctz(unsigned __x) 762{ 763 return static_cast<unsigned>(__builtin_ctz(__x)); 764} 765 766inline _LIBCPP_INLINE_VISIBILITY 767unsigned long 768__ctz(unsigned long __x) 769{ 770 return static_cast<unsigned long>(__builtin_ctzl(__x)); 771} 772 773inline _LIBCPP_INLINE_VISIBILITY 774unsigned long long 775__ctz(unsigned long long __x) 776{ 777 return static_cast<unsigned long long>(__builtin_ctzll(__x)); 778} 779 780// Precondition: __x != 0 781inline _LIBCPP_INLINE_VISIBILITY 782unsigned 783__clz(unsigned __x) 784{ 785 return static_cast<unsigned>(__builtin_clz(__x)); 786} 787 788inline _LIBCPP_INLINE_VISIBILITY 789unsigned long 790__clz(unsigned long __x) 791{ 792 return static_cast<unsigned long>(__builtin_clzl (__x)); 793} 794 795inline _LIBCPP_INLINE_VISIBILITY 796unsigned long long 797__clz(unsigned long long __x) 798{ 799 return static_cast<unsigned long long>(__builtin_clzll(__x)); 800} 801 802inline _LIBCPP_INLINE_VISIBILITY int __pop_count(unsigned __x) {return __builtin_popcount (__x);} 803inline _LIBCPP_INLINE_VISIBILITY int __pop_count(unsigned long __x) {return __builtin_popcountl (__x);} 804inline _LIBCPP_INLINE_VISIBILITY int __pop_count(unsigned long long __x) {return __builtin_popcountll(__x);} 805 806// all_of 807 808template <class _InputIterator, class _Predicate> 809inline _LIBCPP_INLINE_VISIBILITY 810bool 811all_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) 812{ 813 for (; __first != __last; ++__first) 814 if (!__pred(*__first)) 815 return false; 816 return true; 817} 818 819// any_of 820 821template <class _InputIterator, class _Predicate> 822inline _LIBCPP_INLINE_VISIBILITY 823bool 824any_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) 825{ 826 for (; __first != __last; ++__first) 827 if (__pred(*__first)) 828 return true; 829 return false; 830} 831 832// none_of 833 834template <class _InputIterator, class _Predicate> 835inline _LIBCPP_INLINE_VISIBILITY 836bool 837none_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) 838{ 839 for (; __first != __last; ++__first) 840 if (__pred(*__first)) 841 return false; 842 return true; 843} 844 845// for_each 846 847template <class _InputIterator, class _Function> 848inline _LIBCPP_INLINE_VISIBILITY 849_Function 850for_each(_InputIterator __first, _InputIterator __last, _Function __f) 851{ 852 for (; __first != __last; ++__first) 853 __f(*__first); 854 return _VSTD::move(__f); // explicitly moved for (emulated) C++03 855} 856 857// find 858 859template <class _InputIterator, class _Tp> 860inline _LIBCPP_INLINE_VISIBILITY 861_InputIterator 862find(_InputIterator __first, _InputIterator __last, const _Tp& __value_) 863{ 864 for (; __first != __last; ++__first) 865 if (*__first == __value_) 866 break; 867 return __first; 868} 869 870// find_if 871 872template <class _InputIterator, class _Predicate> 873inline _LIBCPP_INLINE_VISIBILITY 874_InputIterator 875find_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) 876{ 877 for (; __first != __last; ++__first) 878 if (__pred(*__first)) 879 break; 880 return __first; 881} 882 883// find_if_not 884 885template<class _InputIterator, class _Predicate> 886inline _LIBCPP_INLINE_VISIBILITY 887_InputIterator 888find_if_not(_InputIterator __first, _InputIterator __last, _Predicate __pred) 889{ 890 for (; __first != __last; ++__first) 891 if (!__pred(*__first)) 892 break; 893 return __first; 894} 895 896// find_end 897 898template <class _BinaryPredicate, class _ForwardIterator1, class _ForwardIterator2> 899_ForwardIterator1 900__find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 901 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred, 902 forward_iterator_tag, forward_iterator_tag) 903{ 904 // modeled after search algorithm 905 _ForwardIterator1 __r = __last1; // __last1 is the "default" answer 906 if (__first2 == __last2) 907 return __r; 908 while (true) 909 { 910 while (true) 911 { 912 if (__first1 == __last1) // if source exhausted return last correct answer 913 return __r; // (or __last1 if never found) 914 if (__pred(*__first1, *__first2)) 915 break; 916 ++__first1; 917 } 918 // *__first1 matches *__first2, now match elements after here 919 _ForwardIterator1 __m1 = __first1; 920 _ForwardIterator2 __m2 = __first2; 921 while (true) 922 { 923 if (++__m2 == __last2) 924 { // Pattern exhaused, record answer and search for another one 925 __r = __first1; 926 ++__first1; 927 break; 928 } 929 if (++__m1 == __last1) // Source exhausted, return last answer 930 return __r; 931 if (!__pred(*__m1, *__m2)) // mismatch, restart with a new __first 932 { 933 ++__first1; 934 break; 935 } // else there is a match, check next elements 936 } 937 } 938} 939 940template <class _BinaryPredicate, class _BidirectionalIterator1, class _BidirectionalIterator2> 941_BidirectionalIterator1 942__find_end(_BidirectionalIterator1 __first1, _BidirectionalIterator1 __last1, 943 _BidirectionalIterator2 __first2, _BidirectionalIterator2 __last2, _BinaryPredicate __pred, 944 bidirectional_iterator_tag, bidirectional_iterator_tag) 945{ 946 // modeled after search algorithm (in reverse) 947 if (__first2 == __last2) 948 return __last1; // Everything matches an empty sequence 949 _BidirectionalIterator1 __l1 = __last1; 950 _BidirectionalIterator2 __l2 = __last2; 951 --__l2; 952 while (true) 953 { 954 // Find last element in sequence 1 that matchs *(__last2-1), with a mininum of loop checks 955 while (true) 956 { 957 if (__first1 == __l1) // return __last1 if no element matches *__first2 958 return __last1; 959 if (__pred(*--__l1, *__l2)) 960 break; 961 } 962 // *__l1 matches *__l2, now match elements before here 963 _BidirectionalIterator1 __m1 = __l1; 964 _BidirectionalIterator2 __m2 = __l2; 965 while (true) 966 { 967 if (__m2 == __first2) // If pattern exhausted, __m1 is the answer (works for 1 element pattern) 968 return __m1; 969 if (__m1 == __first1) // Otherwise if source exhaused, pattern not found 970 return __last1; 971 if (!__pred(*--__m1, *--__m2)) // if there is a mismatch, restart with a new __l1 972 { 973 break; 974 } // else there is a match, check next elements 975 } 976 } 977} 978 979template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 980_LIBCPP_CONSTEXPR_AFTER_CXX11 _RandomAccessIterator1 981__find_end(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 982 _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, 983 random_access_iterator_tag, random_access_iterator_tag) 984{ 985 // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern 986 typename iterator_traits<_RandomAccessIterator2>::difference_type __len2 = __last2 - __first2; 987 if (__len2 == 0) 988 return __last1; 989 typename iterator_traits<_RandomAccessIterator1>::difference_type __len1 = __last1 - __first1; 990 if (__len1 < __len2) 991 return __last1; 992 const _RandomAccessIterator1 __s = __first1 + (__len2 - 1); // End of pattern match can't go before here 993 _RandomAccessIterator1 __l1 = __last1; 994 _RandomAccessIterator2 __l2 = __last2; 995 --__l2; 996 while (true) 997 { 998 while (true) 999 { 1000 if (__s == __l1) 1001 return __last1; 1002 if (__pred(*--__l1, *__l2)) 1003 break; 1004 } 1005 _RandomAccessIterator1 __m1 = __l1; 1006 _RandomAccessIterator2 __m2 = __l2; 1007 while (true) 1008 { 1009 if (__m2 == __first2) 1010 return __m1; 1011 // no need to check range on __m1 because __s guarantees we have enough source 1012 if (!__pred(*--__m1, *--__m2)) 1013 { 1014 break; 1015 } 1016 } 1017 } 1018} 1019 1020template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 1021inline _LIBCPP_INLINE_VISIBILITY 1022_ForwardIterator1 1023find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1024 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 1025{ 1026 return _VSTD::__find_end<typename add_lvalue_reference<_BinaryPredicate>::type> 1027 (__first1, __last1, __first2, __last2, __pred, 1028 typename iterator_traits<_ForwardIterator1>::iterator_category(), 1029 typename iterator_traits<_ForwardIterator2>::iterator_category()); 1030} 1031 1032template <class _ForwardIterator1, class _ForwardIterator2> 1033inline _LIBCPP_INLINE_VISIBILITY 1034_ForwardIterator1 1035find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1036 _ForwardIterator2 __first2, _ForwardIterator2 __last2) 1037{ 1038 typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 1039 typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 1040 return _VSTD::find_end(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 1041} 1042 1043// find_first_of 1044 1045template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 1046_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator1 1047__find_first_of_ce(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1048 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 1049{ 1050 for (; __first1 != __last1; ++__first1) 1051 for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) 1052 if (__pred(*__first1, *__j)) 1053 return __first1; 1054 return __last1; 1055} 1056 1057 1058template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 1059inline _LIBCPP_INLINE_VISIBILITY 1060_ForwardIterator1 1061find_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1062 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 1063{ 1064 return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __pred); 1065} 1066 1067template <class _ForwardIterator1, class _ForwardIterator2> 1068inline _LIBCPP_INLINE_VISIBILITY 1069_ForwardIterator1 1070find_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1071 _ForwardIterator2 __first2, _ForwardIterator2 __last2) 1072{ 1073 typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 1074 typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 1075 return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 1076} 1077 1078// adjacent_find 1079 1080template <class _ForwardIterator, class _BinaryPredicate> 1081inline _LIBCPP_INLINE_VISIBILITY 1082_ForwardIterator 1083adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) 1084{ 1085 if (__first != __last) 1086 { 1087 _ForwardIterator __i = __first; 1088 while (++__i != __last) 1089 { 1090 if (__pred(*__first, *__i)) 1091 return __first; 1092 __first = __i; 1093 } 1094 } 1095 return __last; 1096} 1097 1098template <class _ForwardIterator> 1099inline _LIBCPP_INLINE_VISIBILITY 1100_ForwardIterator 1101adjacent_find(_ForwardIterator __first, _ForwardIterator __last) 1102{ 1103 typedef typename iterator_traits<_ForwardIterator>::value_type __v; 1104 return _VSTD::adjacent_find(__first, __last, __equal_to<__v>()); 1105} 1106 1107// count 1108 1109template <class _InputIterator, class _Tp> 1110inline _LIBCPP_INLINE_VISIBILITY 1111typename iterator_traits<_InputIterator>::difference_type 1112count(_InputIterator __first, _InputIterator __last, const _Tp& __value_) 1113{ 1114 typename iterator_traits<_InputIterator>::difference_type __r(0); 1115 for (; __first != __last; ++__first) 1116 if (*__first == __value_) 1117 ++__r; 1118 return __r; 1119} 1120 1121// count_if 1122 1123template <class _InputIterator, class _Predicate> 1124inline _LIBCPP_INLINE_VISIBILITY 1125typename iterator_traits<_InputIterator>::difference_type 1126count_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) 1127{ 1128 typename iterator_traits<_InputIterator>::difference_type __r(0); 1129 for (; __first != __last; ++__first) 1130 if (__pred(*__first)) 1131 ++__r; 1132 return __r; 1133} 1134 1135// mismatch 1136 1137template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 1138inline _LIBCPP_INLINE_VISIBILITY 1139pair<_InputIterator1, _InputIterator2> 1140mismatch(_InputIterator1 __first1, _InputIterator1 __last1, 1141 _InputIterator2 __first2, _BinaryPredicate __pred) 1142{ 1143 for (; __first1 != __last1; ++__first1, (void) ++__first2) 1144 if (!__pred(*__first1, *__first2)) 1145 break; 1146 return pair<_InputIterator1, _InputIterator2>(__first1, __first2); 1147} 1148 1149template <class _InputIterator1, class _InputIterator2> 1150inline _LIBCPP_INLINE_VISIBILITY 1151pair<_InputIterator1, _InputIterator2> 1152mismatch(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) 1153{ 1154 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 1155 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 1156 return _VSTD::mismatch(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 1157} 1158 1159#if _LIBCPP_STD_VER > 11 1160template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 1161inline _LIBCPP_INLINE_VISIBILITY 1162pair<_InputIterator1, _InputIterator2> 1163mismatch(_InputIterator1 __first1, _InputIterator1 __last1, 1164 _InputIterator2 __first2, _InputIterator2 __last2, 1165 _BinaryPredicate __pred) 1166{ 1167 for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) 1168 if (!__pred(*__first1, *__first2)) 1169 break; 1170 return pair<_InputIterator1, _InputIterator2>(__first1, __first2); 1171} 1172 1173template <class _InputIterator1, class _InputIterator2> 1174inline _LIBCPP_INLINE_VISIBILITY 1175pair<_InputIterator1, _InputIterator2> 1176mismatch(_InputIterator1 __first1, _InputIterator1 __last1, 1177 _InputIterator2 __first2, _InputIterator2 __last2) 1178{ 1179 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 1180 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 1181 return _VSTD::mismatch(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 1182} 1183#endif 1184 1185// equal 1186 1187template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 1188inline _LIBCPP_INLINE_VISIBILITY 1189bool 1190equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) 1191{ 1192 for (; __first1 != __last1; ++__first1, (void) ++__first2) 1193 if (!__pred(*__first1, *__first2)) 1194 return false; 1195 return true; 1196} 1197 1198template <class _InputIterator1, class _InputIterator2> 1199inline _LIBCPP_INLINE_VISIBILITY 1200bool 1201equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) 1202{ 1203 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 1204 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 1205 return _VSTD::equal(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 1206} 1207 1208#if _LIBCPP_STD_VER > 11 1209template <class _BinaryPredicate, class _InputIterator1, class _InputIterator2> 1210inline _LIBCPP_INLINE_VISIBILITY 1211bool 1212__equal(_InputIterator1 __first1, _InputIterator1 __last1, 1213 _InputIterator2 __first2, _InputIterator2 __last2, _BinaryPredicate __pred, 1214 input_iterator_tag, input_iterator_tag ) 1215{ 1216 for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) 1217 if (!__pred(*__first1, *__first2)) 1218 return false; 1219 return __first1 == __last1 && __first2 == __last2; 1220} 1221 1222template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 1223inline _LIBCPP_INLINE_VISIBILITY 1224bool 1225__equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 1226 _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, 1227 random_access_iterator_tag, random_access_iterator_tag ) 1228{ 1229 if ( _VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 1230 return false; 1231 return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, 1232 typename add_lvalue_reference<_BinaryPredicate>::type> 1233 (__first1, __last1, __first2, __pred ); 1234} 1235 1236template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 1237inline _LIBCPP_INLINE_VISIBILITY 1238bool 1239equal(_InputIterator1 __first1, _InputIterator1 __last1, 1240 _InputIterator2 __first2, _InputIterator2 __last2, _BinaryPredicate __pred ) 1241{ 1242 return _VSTD::__equal<typename add_lvalue_reference<_BinaryPredicate>::type> 1243 (__first1, __last1, __first2, __last2, __pred, 1244 typename iterator_traits<_InputIterator1>::iterator_category(), 1245 typename iterator_traits<_InputIterator2>::iterator_category()); 1246} 1247 1248template <class _InputIterator1, class _InputIterator2> 1249inline _LIBCPP_INLINE_VISIBILITY 1250bool 1251equal(_InputIterator1 __first1, _InputIterator1 __last1, 1252 _InputIterator2 __first2, _InputIterator2 __last2) 1253{ 1254 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 1255 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 1256 return _VSTD::__equal(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), 1257 typename iterator_traits<_InputIterator1>::iterator_category(), 1258 typename iterator_traits<_InputIterator2>::iterator_category()); 1259} 1260#endif 1261 1262// is_permutation 1263 1264template<class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 1265bool 1266is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1267 _ForwardIterator2 __first2, _BinaryPredicate __pred) 1268{ 1269 // shorten sequences as much as possible by lopping of any equal parts 1270 for (; __first1 != __last1; ++__first1, (void) ++__first2) 1271 if (!__pred(*__first1, *__first2)) 1272 goto __not_done; 1273 return true; 1274__not_done: 1275 // __first1 != __last1 && *__first1 != *__first2 1276 typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; 1277 _D1 __l1 = _VSTD::distance(__first1, __last1); 1278 if (__l1 == _D1(1)) 1279 return false; 1280 _ForwardIterator2 __last2 = _VSTD::next(__first2, __l1); 1281 // For each element in [f1, l1) see if there are the same number of 1282 // equal elements in [f2, l2) 1283 for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) 1284 { 1285 // Have we already counted the number of *__i in [f1, l1)? 1286 for (_ForwardIterator1 __j = __first1; __j != __i; ++__j) 1287 if (__pred(*__j, *__i)) 1288 goto __next_iter; 1289 { 1290 // Count number of *__i in [f2, l2) 1291 _D1 __c2 = 0; 1292 for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) 1293 if (__pred(*__i, *__j)) 1294 ++__c2; 1295 if (__c2 == 0) 1296 return false; 1297 // Count number of *__i in [__i, l1) (we can start with 1) 1298 _D1 __c1 = 1; 1299 for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) 1300 if (__pred(*__i, *__j)) 1301 ++__c1; 1302 if (__c1 != __c2) 1303 return false; 1304 } 1305__next_iter:; 1306 } 1307 return true; 1308} 1309 1310template<class _ForwardIterator1, class _ForwardIterator2> 1311inline _LIBCPP_INLINE_VISIBILITY 1312bool 1313is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1314 _ForwardIterator2 __first2) 1315{ 1316 typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 1317 typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 1318 return _VSTD::is_permutation(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 1319} 1320 1321#if _LIBCPP_STD_VER > 11 1322template<class _BinaryPredicate, class _ForwardIterator1, class _ForwardIterator2> 1323bool 1324__is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1325 _ForwardIterator2 __first2, _ForwardIterator2 __last2, 1326 _BinaryPredicate __pred, 1327 forward_iterator_tag, forward_iterator_tag ) 1328{ 1329 // shorten sequences as much as possible by lopping of any equal parts 1330 for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) 1331 if (!__pred(*__first1, *__first2)) 1332 goto __not_done; 1333 return __first1 == __last1 && __first2 == __last2; 1334__not_done: 1335 // __first1 != __last1 && __first2 != __last2 && *__first1 != *__first2 1336 typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; 1337 _D1 __l1 = _VSTD::distance(__first1, __last1); 1338 1339 typedef typename iterator_traits<_ForwardIterator2>::difference_type _D2; 1340 _D2 __l2 = _VSTD::distance(__first2, __last2); 1341 if (__l1 != __l2) 1342 return false; 1343 1344 // For each element in [f1, l1) see if there are the same number of 1345 // equal elements in [f2, l2) 1346 for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) 1347 { 1348 // Have we already counted the number of *__i in [f1, l1)? 1349 for (_ForwardIterator1 __j = __first1; __j != __i; ++__j) 1350 if (__pred(*__j, *__i)) 1351 goto __next_iter; 1352 { 1353 // Count number of *__i in [f2, l2) 1354 _D1 __c2 = 0; 1355 for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) 1356 if (__pred(*__i, *__j)) 1357 ++__c2; 1358 if (__c2 == 0) 1359 return false; 1360 // Count number of *__i in [__i, l1) (we can start with 1) 1361 _D1 __c1 = 1; 1362 for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) 1363 if (__pred(*__i, *__j)) 1364 ++__c1; 1365 if (__c1 != __c2) 1366 return false; 1367 } 1368__next_iter:; 1369 } 1370 return true; 1371} 1372 1373template<class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 1374bool 1375__is_permutation(_RandomAccessIterator1 __first1, _RandomAccessIterator2 __last1, 1376 _RandomAccessIterator1 __first2, _RandomAccessIterator2 __last2, 1377 _BinaryPredicate __pred, 1378 random_access_iterator_tag, random_access_iterator_tag ) 1379{ 1380 if ( _VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 1381 return false; 1382 return _VSTD::is_permutation<_RandomAccessIterator1, _RandomAccessIterator2, 1383 typename add_lvalue_reference<_BinaryPredicate>::type> 1384 (__first1, __last1, __first2, __pred ); 1385} 1386 1387template<class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 1388inline _LIBCPP_INLINE_VISIBILITY 1389bool 1390is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1391 _ForwardIterator2 __first2, _ForwardIterator2 __last2, 1392 _BinaryPredicate __pred ) 1393{ 1394 return _VSTD::__is_permutation<typename add_lvalue_reference<_BinaryPredicate>::type> 1395 (__first1, __last1, __first2, __last2, __pred, 1396 typename iterator_traits<_ForwardIterator1>::iterator_category(), 1397 typename iterator_traits<_ForwardIterator2>::iterator_category()); 1398} 1399 1400template<class _ForwardIterator1, class _ForwardIterator2> 1401inline _LIBCPP_INLINE_VISIBILITY 1402bool 1403is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1404 _ForwardIterator2 __first2, _ForwardIterator2 __last2) 1405{ 1406 typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 1407 typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 1408 return _VSTD::__is_permutation(__first1, __last1, __first2, __last2, 1409 __equal_to<__v1, __v2>(), 1410 typename iterator_traits<_ForwardIterator1>::iterator_category(), 1411 typename iterator_traits<_ForwardIterator2>::iterator_category()); 1412} 1413#endif 1414 1415// search 1416 1417template <class _BinaryPredicate, class _ForwardIterator1, class _ForwardIterator2> 1418_ForwardIterator1 1419__search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1420 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred, 1421 forward_iterator_tag, forward_iterator_tag) 1422{ 1423 if (__first2 == __last2) 1424 return __first1; // Everything matches an empty sequence 1425 while (true) 1426 { 1427 // Find first element in sequence 1 that matchs *__first2, with a mininum of loop checks 1428 while (true) 1429 { 1430 if (__first1 == __last1) // return __last1 if no element matches *__first2 1431 return __last1; 1432 if (__pred(*__first1, *__first2)) 1433 break; 1434 ++__first1; 1435 } 1436 // *__first1 matches *__first2, now match elements after here 1437 _ForwardIterator1 __m1 = __first1; 1438 _ForwardIterator2 __m2 = __first2; 1439 while (true) 1440 { 1441 if (++__m2 == __last2) // If pattern exhausted, __first1 is the answer (works for 1 element pattern) 1442 return __first1; 1443 if (++__m1 == __last1) // Otherwise if source exhaused, pattern not found 1444 return __last1; 1445 if (!__pred(*__m1, *__m2)) // if there is a mismatch, restart with a new __first1 1446 { 1447 ++__first1; 1448 break; 1449 } // else there is a match, check next elements 1450 } 1451 } 1452} 1453 1454template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 1455_LIBCPP_CONSTEXPR_AFTER_CXX11 _RandomAccessIterator1 1456__search(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 1457 _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, 1458 random_access_iterator_tag, random_access_iterator_tag) 1459{ 1460 typedef typename std::iterator_traits<_RandomAccessIterator1>::difference_type _D1; 1461 typedef typename std::iterator_traits<_RandomAccessIterator2>::difference_type _D2; 1462 // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern 1463 _D2 __len2 = __last2 - __first2; 1464 if (__len2 == 0) 1465 return __first1; 1466 _D1 __len1 = __last1 - __first1; 1467 if (__len1 < __len2) 1468 return __last1; 1469 const _RandomAccessIterator1 __s = __last1 - (__len2 - 1); // Start of pattern match can't go beyond here 1470 while (true) 1471 { 1472#if !_LIBCPP_UNROLL_LOOPS 1473 while (true) 1474 { 1475 if (__first1 == __s) 1476 return __last1; 1477 if (__pred(*__first1, *__first2)) 1478 break; 1479 ++__first1; 1480 } 1481#else // !_LIBCPP_UNROLL_LOOPS 1482 for (_D1 __loop_unroll = (__s - __first1) / 4; __loop_unroll > 0; --__loop_unroll) 1483 { 1484 if (__pred(*__first1, *__first2)) 1485 goto __phase2; 1486 if (__pred(*++__first1, *__first2)) 1487 goto __phase2; 1488 if (__pred(*++__first1, *__first2)) 1489 goto __phase2; 1490 if (__pred(*++__first1, *__first2)) 1491 goto __phase2; 1492 ++__first1; 1493 } 1494 switch (__s - __first1) 1495 { 1496 case 3: 1497 if (__pred(*__first1, *__first2)) 1498 break; 1499 ++__first1; 1500 case 2: 1501 if (__pred(*__first1, *__first2)) 1502 break; 1503 ++__first1; 1504 case 1: 1505 if (__pred(*__first1, *__first2)) 1506 break; 1507 case 0: 1508 return __last1; 1509 } 1510 __phase2: 1511#endif // !_LIBCPP_UNROLL_LOOPS 1512 _RandomAccessIterator1 __m1 = __first1; 1513 _RandomAccessIterator2 __m2 = __first2; 1514#if !_LIBCPP_UNROLL_LOOPS 1515 while (true) 1516 { 1517 if (++__m2 == __last2) 1518 return __first1; 1519 ++__m1; // no need to check range on __m1 because __s guarantees we have enough source 1520 if (!__pred(*__m1, *__m2)) 1521 { 1522 ++__first1; 1523 break; 1524 } 1525 } 1526#else // !_LIBCPP_UNROLL_LOOPS 1527 ++__m2; 1528 ++__m1; 1529 for (_D2 __loop_unroll = (__last2 - __m2) / 4; __loop_unroll > 0; --__loop_unroll) 1530 { 1531 if (!__pred(*__m1, *__m2)) 1532 goto __continue; 1533 if (!__pred(*++__m1, *++__m2)) 1534 goto __continue; 1535 if (!__pred(*++__m1, *++__m2)) 1536 goto __continue; 1537 if (!__pred(*++__m1, *++__m2)) 1538 goto __continue; 1539 ++__m1; 1540 ++__m2; 1541 } 1542 switch (__last2 - __m2) 1543 { 1544 case 3: 1545 if (!__pred(*__m1, *__m2)) 1546 break; 1547 ++__m1; 1548 ++__m2; 1549 case 2: 1550 if (!__pred(*__m1, *__m2)) 1551 break; 1552 ++__m1; 1553 ++__m2; 1554 case 1: 1555 if (!__pred(*__m1, *__m2)) 1556 break; 1557 case 0: 1558 return __first1; 1559 } 1560 __continue: 1561 ++__first1; 1562#endif // !_LIBCPP_UNROLL_LOOPS 1563 } 1564} 1565 1566template <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 1567inline _LIBCPP_INLINE_VISIBILITY 1568_ForwardIterator1 1569search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1570 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 1571{ 1572 return _VSTD::__search<typename add_lvalue_reference<_BinaryPredicate>::type> 1573 (__first1, __last1, __first2, __last2, __pred, 1574 typename std::iterator_traits<_ForwardIterator1>::iterator_category(), 1575 typename std::iterator_traits<_ForwardIterator2>::iterator_category()); 1576} 1577 1578template <class _ForwardIterator1, class _ForwardIterator2> 1579inline _LIBCPP_INLINE_VISIBILITY 1580_ForwardIterator1 1581search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 1582 _ForwardIterator2 __first2, _ForwardIterator2 __last2) 1583{ 1584 typedef typename std::iterator_traits<_ForwardIterator1>::value_type __v1; 1585 typedef typename std::iterator_traits<_ForwardIterator2>::value_type __v2; 1586 return _VSTD::search(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 1587} 1588 1589// search_n 1590 1591template <class _BinaryPredicate, class _ForwardIterator, class _Size, class _Tp> 1592_ForwardIterator 1593__search_n(_ForwardIterator __first, _ForwardIterator __last, 1594 _Size __count, const _Tp& __value_, _BinaryPredicate __pred, forward_iterator_tag) 1595{ 1596 if (__count <= 0) 1597 return __first; 1598 while (true) 1599 { 1600 // Find first element in sequence that matchs __value_, with a mininum of loop checks 1601 while (true) 1602 { 1603 if (__first == __last) // return __last if no element matches __value_ 1604 return __last; 1605 if (__pred(*__first, __value_)) 1606 break; 1607 ++__first; 1608 } 1609 // *__first matches __value_, now match elements after here 1610 _ForwardIterator __m = __first; 1611 _Size __c(0); 1612 while (true) 1613 { 1614 if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) 1615 return __first; 1616 if (++__m == __last) // Otherwise if source exhaused, pattern not found 1617 return __last; 1618 if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first 1619 { 1620 __first = __m; 1621 ++__first; 1622 break; 1623 } // else there is a match, check next elements 1624 } 1625 } 1626} 1627 1628template <class _BinaryPredicate, class _RandomAccessIterator, class _Size, class _Tp> 1629_RandomAccessIterator 1630__search_n(_RandomAccessIterator __first, _RandomAccessIterator __last, 1631 _Size __count, const _Tp& __value_, _BinaryPredicate __pred, random_access_iterator_tag) 1632{ 1633 if (__count <= 0) 1634 return __first; 1635 _Size __len = static_cast<_Size>(__last - __first); 1636 if (__len < __count) 1637 return __last; 1638 const _RandomAccessIterator __s = __last - (__count - 1); // Start of pattern match can't go beyond here 1639 while (true) 1640 { 1641 // Find first element in sequence that matchs __value_, with a mininum of loop checks 1642 while (true) 1643 { 1644 if (__first >= __s) // return __last if no element matches __value_ 1645 return __last; 1646 if (__pred(*__first, __value_)) 1647 break; 1648 ++__first; 1649 } 1650 // *__first matches __value_, now match elements after here 1651 _RandomAccessIterator __m = __first; 1652 _Size __c(0); 1653 while (true) 1654 { 1655 if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) 1656 return __first; 1657 ++__m; // no need to check range on __m because __s guarantees we have enough source 1658 if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first 1659 { 1660 __first = __m; 1661 ++__first; 1662 break; 1663 } // else there is a match, check next elements 1664 } 1665 } 1666} 1667 1668template <class _ForwardIterator, class _Size, class _Tp, class _BinaryPredicate> 1669inline _LIBCPP_INLINE_VISIBILITY 1670_ForwardIterator 1671search_n(_ForwardIterator __first, _ForwardIterator __last, 1672 _Size __count, const _Tp& __value_, _BinaryPredicate __pred) 1673{ 1674 return _VSTD::__search_n<typename add_lvalue_reference<_BinaryPredicate>::type> 1675 (__first, __last, __convert_to_integral(__count), __value_, __pred, 1676 typename iterator_traits<_ForwardIterator>::iterator_category()); 1677} 1678 1679template <class _ForwardIterator, class _Size, class _Tp> 1680inline _LIBCPP_INLINE_VISIBILITY 1681_ForwardIterator 1682search_n(_ForwardIterator __first, _ForwardIterator __last, _Size __count, const _Tp& __value_) 1683{ 1684 typedef typename iterator_traits<_ForwardIterator>::value_type __v; 1685 return _VSTD::search_n(__first, __last, __convert_to_integral(__count), 1686 __value_, __equal_to<__v, _Tp>()); 1687} 1688 1689// copy 1690 1691template <class _Iter> 1692struct __libcpp_is_trivial_iterator 1693{ 1694 static const bool value = is_pointer<_Iter>::value; 1695}; 1696 1697template <class _Iter> 1698struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1699{ 1700 static const bool value = is_pointer<_Iter>::value; 1701}; 1702 1703template <class _Iter> 1704struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1705{ 1706 static const bool value = is_pointer<_Iter>::value; 1707}; 1708 1709template <class _Iter> 1710inline _LIBCPP_INLINE_VISIBILITY 1711_Iter 1712__unwrap_iter(_Iter __i) 1713{ 1714 return __i; 1715} 1716 1717template <class _Tp> 1718inline _LIBCPP_INLINE_VISIBILITY 1719typename enable_if 1720< 1721 is_trivially_copy_assignable<_Tp>::value, 1722 _Tp* 1723>::type 1724__unwrap_iter(move_iterator<_Tp*> __i) 1725{ 1726 return __i.base(); 1727} 1728 1729#if _LIBCPP_DEBUG_LEVEL < 2 1730 1731template <class _Tp> 1732inline _LIBCPP_INLINE_VISIBILITY 1733typename enable_if 1734< 1735 is_trivially_copy_assignable<_Tp>::value, 1736 _Tp* 1737>::type 1738__unwrap_iter(__wrap_iter<_Tp*> __i) 1739{ 1740 return __i.base(); 1741} 1742 1743#endif // _LIBCPP_DEBUG_LEVEL < 2 1744 1745template <class _InputIterator, class _OutputIterator> 1746inline _LIBCPP_INLINE_VISIBILITY 1747_OutputIterator 1748__copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 1749{ 1750 for (; __first != __last; ++__first, (void) ++__result) 1751 *__result = *__first; 1752 return __result; 1753} 1754 1755template <class _Tp, class _Up> 1756inline _LIBCPP_INLINE_VISIBILITY 1757typename enable_if 1758< 1759 is_same<typename remove_const<_Tp>::type, _Up>::value && 1760 is_trivially_copy_assignable<_Up>::value, 1761 _Up* 1762>::type 1763__copy(_Tp* __first, _Tp* __last, _Up* __result) 1764{ 1765 const size_t __n = static_cast<size_t>(__last - __first); 1766 if (__n > 0) 1767 _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 1768 return __result + __n; 1769} 1770 1771template <class _InputIterator, class _OutputIterator> 1772inline _LIBCPP_INLINE_VISIBILITY 1773_OutputIterator 1774copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 1775{ 1776 return _VSTD::__copy(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result)); 1777} 1778 1779// copy_backward 1780 1781template <class _BidirectionalIterator, class _OutputIterator> 1782inline _LIBCPP_INLINE_VISIBILITY 1783_OutputIterator 1784__copy_backward(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) 1785{ 1786 while (__first != __last) 1787 *--__result = *--__last; 1788 return __result; 1789} 1790 1791template <class _Tp, class _Up> 1792inline _LIBCPP_INLINE_VISIBILITY 1793typename enable_if 1794< 1795 is_same<typename remove_const<_Tp>::type, _Up>::value && 1796 is_trivially_copy_assignable<_Up>::value, 1797 _Up* 1798>::type 1799__copy_backward(_Tp* __first, _Tp* __last, _Up* __result) 1800{ 1801 const size_t __n = static_cast<size_t>(__last - __first); 1802 if (__n > 0) 1803 { 1804 __result -= __n; 1805 _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 1806 } 1807 return __result; 1808} 1809 1810template <class _BidirectionalIterator1, class _BidirectionalIterator2> 1811inline _LIBCPP_INLINE_VISIBILITY 1812_BidirectionalIterator2 1813copy_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, 1814 _BidirectionalIterator2 __result) 1815{ 1816 return _VSTD::__copy_backward(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result)); 1817} 1818 1819// copy_if 1820 1821template<class _InputIterator, class _OutputIterator, class _Predicate> 1822inline _LIBCPP_INLINE_VISIBILITY 1823_OutputIterator 1824copy_if(_InputIterator __first, _InputIterator __last, 1825 _OutputIterator __result, _Predicate __pred) 1826{ 1827 for (; __first != __last; ++__first) 1828 { 1829 if (__pred(*__first)) 1830 { 1831 *__result = *__first; 1832 ++__result; 1833 } 1834 } 1835 return __result; 1836} 1837 1838// copy_n 1839 1840template<class _InputIterator, class _Size, class _OutputIterator> 1841inline _LIBCPP_INLINE_VISIBILITY 1842typename enable_if 1843< 1844 __is_input_iterator<_InputIterator>::value && 1845 !__is_random_access_iterator<_InputIterator>::value, 1846 _OutputIterator 1847>::type 1848copy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) 1849{ 1850 typedef decltype(__convert_to_integral(__orig_n)) _IntegralSize; 1851 _IntegralSize __n = __orig_n; 1852 if (__n > 0) 1853 { 1854 *__result = *__first; 1855 ++__result; 1856 for (--__n; __n > 0; --__n) 1857 { 1858 ++__first; 1859 *__result = *__first; 1860 ++__result; 1861 } 1862 } 1863 return __result; 1864} 1865 1866template<class _InputIterator, class _Size, class _OutputIterator> 1867inline _LIBCPP_INLINE_VISIBILITY 1868typename enable_if 1869< 1870 __is_random_access_iterator<_InputIterator>::value, 1871 _OutputIterator 1872>::type 1873copy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) 1874{ 1875 typedef decltype(__convert_to_integral(__orig_n)) _IntegralSize; 1876 _IntegralSize __n = __orig_n; 1877 return _VSTD::copy(__first, __first + __n, __result); 1878} 1879 1880// move 1881 1882template <class _InputIterator, class _OutputIterator> 1883inline _LIBCPP_INLINE_VISIBILITY 1884_OutputIterator 1885__move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 1886{ 1887 for (; __first != __last; ++__first, (void) ++__result) 1888 *__result = _VSTD::move(*__first); 1889 return __result; 1890} 1891 1892template <class _Tp, class _Up> 1893inline _LIBCPP_INLINE_VISIBILITY 1894typename enable_if 1895< 1896 is_same<typename remove_const<_Tp>::type, _Up>::value && 1897 is_trivially_copy_assignable<_Up>::value, 1898 _Up* 1899>::type 1900__move(_Tp* __first, _Tp* __last, _Up* __result) 1901{ 1902 const size_t __n = static_cast<size_t>(__last - __first); 1903 if (__n > 0) 1904 _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 1905 return __result + __n; 1906} 1907 1908template <class _InputIterator, class _OutputIterator> 1909inline _LIBCPP_INLINE_VISIBILITY 1910_OutputIterator 1911move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 1912{ 1913 return _VSTD::__move(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result)); 1914} 1915 1916// move_backward 1917 1918template <class _InputIterator, class _OutputIterator> 1919inline _LIBCPP_INLINE_VISIBILITY 1920_OutputIterator 1921__move_backward(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 1922{ 1923 while (__first != __last) 1924 *--__result = _VSTD::move(*--__last); 1925 return __result; 1926} 1927 1928template <class _Tp, class _Up> 1929inline _LIBCPP_INLINE_VISIBILITY 1930typename enable_if 1931< 1932 is_same<typename remove_const<_Tp>::type, _Up>::value && 1933 is_trivially_copy_assignable<_Up>::value, 1934 _Up* 1935>::type 1936__move_backward(_Tp* __first, _Tp* __last, _Up* __result) 1937{ 1938 const size_t __n = static_cast<size_t>(__last - __first); 1939 if (__n > 0) 1940 { 1941 __result -= __n; 1942 _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 1943 } 1944 return __result; 1945} 1946 1947template <class _BidirectionalIterator1, class _BidirectionalIterator2> 1948inline _LIBCPP_INLINE_VISIBILITY 1949_BidirectionalIterator2 1950move_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, 1951 _BidirectionalIterator2 __result) 1952{ 1953 return _VSTD::__move_backward(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result)); 1954} 1955 1956// iter_swap 1957 1958// moved to <type_traits> for better swap / noexcept support 1959 1960// transform 1961 1962template <class _InputIterator, class _OutputIterator, class _UnaryOperation> 1963inline _LIBCPP_INLINE_VISIBILITY 1964_OutputIterator 1965transform(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _UnaryOperation __op) 1966{ 1967 for (; __first != __last; ++__first, (void) ++__result) 1968 *__result = __op(*__first); 1969 return __result; 1970} 1971 1972template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _BinaryOperation> 1973inline _LIBCPP_INLINE_VISIBILITY 1974_OutputIterator 1975transform(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, 1976 _OutputIterator __result, _BinaryOperation __binary_op) 1977{ 1978 for (; __first1 != __last1; ++__first1, (void) ++__first2, ++__result) 1979 *__result = __binary_op(*__first1, *__first2); 1980 return __result; 1981} 1982 1983// replace 1984 1985template <class _ForwardIterator, class _Tp> 1986inline _LIBCPP_INLINE_VISIBILITY 1987void 1988replace(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __old_value, const _Tp& __new_value) 1989{ 1990 for (; __first != __last; ++__first) 1991 if (*__first == __old_value) 1992 *__first = __new_value; 1993} 1994 1995// replace_if 1996 1997template <class _ForwardIterator, class _Predicate, class _Tp> 1998inline _LIBCPP_INLINE_VISIBILITY 1999void 2000replace_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, const _Tp& __new_value) 2001{ 2002 for (; __first != __last; ++__first) 2003 if (__pred(*__first)) 2004 *__first = __new_value; 2005} 2006 2007// replace_copy 2008 2009template <class _InputIterator, class _OutputIterator, class _Tp> 2010inline _LIBCPP_INLINE_VISIBILITY 2011_OutputIterator 2012replace_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, 2013 const _Tp& __old_value, const _Tp& __new_value) 2014{ 2015 for (; __first != __last; ++__first, (void) ++__result) 2016 if (*__first == __old_value) 2017 *__result = __new_value; 2018 else 2019 *__result = *__first; 2020 return __result; 2021} 2022 2023// replace_copy_if 2024 2025template <class _InputIterator, class _OutputIterator, class _Predicate, class _Tp> 2026inline _LIBCPP_INLINE_VISIBILITY 2027_OutputIterator 2028replace_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, 2029 _Predicate __pred, const _Tp& __new_value) 2030{ 2031 for (; __first != __last; ++__first, (void) ++__result) 2032 if (__pred(*__first)) 2033 *__result = __new_value; 2034 else 2035 *__result = *__first; 2036 return __result; 2037} 2038 2039// fill_n 2040 2041template <class _OutputIterator, class _Size, class _Tp> 2042inline _LIBCPP_INLINE_VISIBILITY 2043_OutputIterator 2044__fill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) 2045{ 2046 for (; __n > 0; ++__first, (void) --__n) 2047 *__first = __value_; 2048 return __first; 2049} 2050 2051template <class _Tp, class _Size, class _Up> 2052inline _LIBCPP_INLINE_VISIBILITY 2053typename enable_if 2054< 2055 is_integral<_Tp>::value && sizeof(_Tp) == 1 && 2056 !is_same<_Tp, bool>::value && 2057 is_integral<_Up>::value && sizeof(_Up) == 1, 2058 _Tp* 2059>::type 2060__fill_n(_Tp* __first, _Size __n,_Up __value_) 2061{ 2062 if (__n > 0) 2063 _VSTD::memset(__first, (unsigned char)__value_, (size_t)(__n)); 2064 return __first + __n; 2065} 2066 2067template <class _OutputIterator, class _Size, class _Tp> 2068inline _LIBCPP_INLINE_VISIBILITY 2069_OutputIterator 2070fill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) 2071{ 2072 return _VSTD::__fill_n(__first, __convert_to_integral(__n), __value_); 2073} 2074 2075// fill 2076 2077template <class _ForwardIterator, class _Tp> 2078inline _LIBCPP_INLINE_VISIBILITY 2079void 2080__fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, forward_iterator_tag) 2081{ 2082 for (; __first != __last; ++__first) 2083 *__first = __value_; 2084} 2085 2086template <class _RandomAccessIterator, class _Tp> 2087inline _LIBCPP_INLINE_VISIBILITY 2088void 2089__fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value_, random_access_iterator_tag) 2090{ 2091 _VSTD::fill_n(__first, __last - __first, __value_); 2092} 2093 2094template <class _ForwardIterator, class _Tp> 2095inline _LIBCPP_INLINE_VISIBILITY 2096void 2097fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 2098{ 2099 _VSTD::__fill(__first, __last, __value_, typename iterator_traits<_ForwardIterator>::iterator_category()); 2100} 2101 2102// generate 2103 2104template <class _ForwardIterator, class _Generator> 2105inline _LIBCPP_INLINE_VISIBILITY 2106void 2107generate(_ForwardIterator __first, _ForwardIterator __last, _Generator __gen) 2108{ 2109 for (; __first != __last; ++__first) 2110 *__first = __gen(); 2111} 2112 2113// generate_n 2114 2115template <class _OutputIterator, class _Size, class _Generator> 2116inline _LIBCPP_INLINE_VISIBILITY 2117_OutputIterator 2118generate_n(_OutputIterator __first, _Size __orig_n, _Generator __gen) 2119{ 2120 typedef decltype(__convert_to_integral(__orig_n)) _IntegralSize; 2121 _IntegralSize __n = __orig_n; 2122 for (; __n > 0; ++__first, (void) --__n) 2123 *__first = __gen(); 2124 return __first; 2125} 2126 2127// remove 2128 2129template <class _ForwardIterator, class _Tp> 2130_ForwardIterator 2131remove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 2132{ 2133 __first = _VSTD::find(__first, __last, __value_); 2134 if (__first != __last) 2135 { 2136 _ForwardIterator __i = __first; 2137 while (++__i != __last) 2138 { 2139 if (!(*__i == __value_)) 2140 { 2141 *__first = _VSTD::move(*__i); 2142 ++__first; 2143 } 2144 } 2145 } 2146 return __first; 2147} 2148 2149// remove_if 2150 2151template <class _ForwardIterator, class _Predicate> 2152_ForwardIterator 2153remove_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 2154{ 2155 __first = _VSTD::find_if<_ForwardIterator, typename add_lvalue_reference<_Predicate>::type> 2156 (__first, __last, __pred); 2157 if (__first != __last) 2158 { 2159 _ForwardIterator __i = __first; 2160 while (++__i != __last) 2161 { 2162 if (!__pred(*__i)) 2163 { 2164 *__first = _VSTD::move(*__i); 2165 ++__first; 2166 } 2167 } 2168 } 2169 return __first; 2170} 2171 2172// remove_copy 2173 2174template <class _InputIterator, class _OutputIterator, class _Tp> 2175inline _LIBCPP_INLINE_VISIBILITY 2176_OutputIterator 2177remove_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, const _Tp& __value_) 2178{ 2179 for (; __first != __last; ++__first) 2180 { 2181 if (!(*__first == __value_)) 2182 { 2183 *__result = *__first; 2184 ++__result; 2185 } 2186 } 2187 return __result; 2188} 2189 2190// remove_copy_if 2191 2192template <class _InputIterator, class _OutputIterator, class _Predicate> 2193inline _LIBCPP_INLINE_VISIBILITY 2194_OutputIterator 2195remove_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Predicate __pred) 2196{ 2197 for (; __first != __last; ++__first) 2198 { 2199 if (!__pred(*__first)) 2200 { 2201 *__result = *__first; 2202 ++__result; 2203 } 2204 } 2205 return __result; 2206} 2207 2208// unique 2209 2210template <class _ForwardIterator, class _BinaryPredicate> 2211_ForwardIterator 2212unique(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) 2213{ 2214 __first = _VSTD::adjacent_find<_ForwardIterator, typename add_lvalue_reference<_BinaryPredicate>::type> 2215 (__first, __last, __pred); 2216 if (__first != __last) 2217 { 2218 // ... a a ? ... 2219 // f i 2220 _ForwardIterator __i = __first; 2221 for (++__i; ++__i != __last;) 2222 if (!__pred(*__first, *__i)) 2223 *++__first = _VSTD::move(*__i); 2224 ++__first; 2225 } 2226 return __first; 2227} 2228 2229template <class _ForwardIterator> 2230inline _LIBCPP_INLINE_VISIBILITY 2231_ForwardIterator 2232unique(_ForwardIterator __first, _ForwardIterator __last) 2233{ 2234 typedef typename iterator_traits<_ForwardIterator>::value_type __v; 2235 return _VSTD::unique(__first, __last, __equal_to<__v>()); 2236} 2237 2238// unique_copy 2239 2240template <class _BinaryPredicate, class _InputIterator, class _OutputIterator> 2241_OutputIterator 2242__unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred, 2243 input_iterator_tag, output_iterator_tag) 2244{ 2245 if (__first != __last) 2246 { 2247 typename iterator_traits<_InputIterator>::value_type __t(*__first); 2248 *__result = __t; 2249 ++__result; 2250 while (++__first != __last) 2251 { 2252 if (!__pred(__t, *__first)) 2253 { 2254 __t = *__first; 2255 *__result = __t; 2256 ++__result; 2257 } 2258 } 2259 } 2260 return __result; 2261} 2262 2263template <class _BinaryPredicate, class _ForwardIterator, class _OutputIterator> 2264_OutputIterator 2265__unique_copy(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, _BinaryPredicate __pred, 2266 forward_iterator_tag, output_iterator_tag) 2267{ 2268 if (__first != __last) 2269 { 2270 _ForwardIterator __i = __first; 2271 *__result = *__i; 2272 ++__result; 2273 while (++__first != __last) 2274 { 2275 if (!__pred(*__i, *__first)) 2276 { 2277 *__result = *__first; 2278 ++__result; 2279 __i = __first; 2280 } 2281 } 2282 } 2283 return __result; 2284} 2285 2286template <class _BinaryPredicate, class _InputIterator, class _ForwardIterator> 2287_ForwardIterator 2288__unique_copy(_InputIterator __first, _InputIterator __last, _ForwardIterator __result, _BinaryPredicate __pred, 2289 input_iterator_tag, forward_iterator_tag) 2290{ 2291 if (__first != __last) 2292 { 2293 *__result = *__first; 2294 while (++__first != __last) 2295 if (!__pred(*__result, *__first)) 2296 *++__result = *__first; 2297 ++__result; 2298 } 2299 return __result; 2300} 2301 2302template <class _InputIterator, class _OutputIterator, class _BinaryPredicate> 2303inline _LIBCPP_INLINE_VISIBILITY 2304_OutputIterator 2305unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) 2306{ 2307 return _VSTD::__unique_copy<typename add_lvalue_reference<_BinaryPredicate>::type> 2308 (__first, __last, __result, __pred, 2309 typename iterator_traits<_InputIterator>::iterator_category(), 2310 typename iterator_traits<_OutputIterator>::iterator_category()); 2311} 2312 2313template <class _InputIterator, class _OutputIterator> 2314inline _LIBCPP_INLINE_VISIBILITY 2315_OutputIterator 2316unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 2317{ 2318 typedef typename iterator_traits<_InputIterator>::value_type __v; 2319 return _VSTD::unique_copy(__first, __last, __result, __equal_to<__v>()); 2320} 2321 2322// reverse 2323 2324template <class _BidirectionalIterator> 2325inline _LIBCPP_INLINE_VISIBILITY 2326void 2327__reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, bidirectional_iterator_tag) 2328{ 2329 while (__first != __last) 2330 { 2331 if (__first == --__last) 2332 break; 2333 swap(*__first, *__last); 2334 ++__first; 2335 } 2336} 2337 2338template <class _RandomAccessIterator> 2339inline _LIBCPP_INLINE_VISIBILITY 2340void 2341__reverse(_RandomAccessIterator __first, _RandomAccessIterator __last, random_access_iterator_tag) 2342{ 2343 if (__first != __last) 2344 for (; __first < --__last; ++__first) 2345 swap(*__first, *__last); 2346} 2347 2348template <class _BidirectionalIterator> 2349inline _LIBCPP_INLINE_VISIBILITY 2350void 2351reverse(_BidirectionalIterator __first, _BidirectionalIterator __last) 2352{ 2353 _VSTD::__reverse(__first, __last, typename iterator_traits<_BidirectionalIterator>::iterator_category()); 2354} 2355 2356// reverse_copy 2357 2358template <class _BidirectionalIterator, class _OutputIterator> 2359inline _LIBCPP_INLINE_VISIBILITY 2360_OutputIterator 2361reverse_copy(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) 2362{ 2363 for (; __first != __last; ++__result) 2364 *__result = *--__last; 2365 return __result; 2366} 2367 2368// rotate 2369 2370template <class _ForwardIterator> 2371_ForwardIterator 2372__rotate_left(_ForwardIterator __first, _ForwardIterator __last) 2373{ 2374 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2375 value_type __tmp = _VSTD::move(*__first); 2376 _ForwardIterator __lm1 = _VSTD::move(_VSTD::next(__first), __last, __first); 2377 *__lm1 = _VSTD::move(__tmp); 2378 return __lm1; 2379} 2380 2381template <class _BidirectionalIterator> 2382_BidirectionalIterator 2383__rotate_right(_BidirectionalIterator __first, _BidirectionalIterator __last) 2384{ 2385 typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 2386 _BidirectionalIterator __lm1 = _VSTD::prev(__last); 2387 value_type __tmp = _VSTD::move(*__lm1); 2388 _BidirectionalIterator __fp1 = _VSTD::move_backward(__first, __lm1, __last); 2389 *__first = _VSTD::move(__tmp); 2390 return __fp1; 2391} 2392 2393template <class _ForwardIterator> 2394_ForwardIterator 2395__rotate_forward(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) 2396{ 2397 _ForwardIterator __i = __middle; 2398 while (true) 2399 { 2400 swap(*__first, *__i); 2401 ++__first; 2402 if (++__i == __last) 2403 break; 2404 if (__first == __middle) 2405 __middle = __i; 2406 } 2407 _ForwardIterator __r = __first; 2408 if (__first != __middle) 2409 { 2410 __i = __middle; 2411 while (true) 2412 { 2413 swap(*__first, *__i); 2414 ++__first; 2415 if (++__i == __last) 2416 { 2417 if (__first == __middle) 2418 break; 2419 __i = __middle; 2420 } 2421 else if (__first == __middle) 2422 __middle = __i; 2423 } 2424 } 2425 return __r; 2426} 2427 2428template<typename _Integral> 2429inline _LIBCPP_INLINE_VISIBILITY 2430_Integral 2431__gcd(_Integral __x, _Integral __y) 2432{ 2433 do 2434 { 2435 _Integral __t = __x % __y; 2436 __x = __y; 2437 __y = __t; 2438 } while (__y); 2439 return __x; 2440} 2441 2442template<typename _RandomAccessIterator> 2443_RandomAccessIterator 2444__rotate_gcd(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) 2445{ 2446 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 2447 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 2448 2449 const difference_type __m1 = __middle - __first; 2450 const difference_type __m2 = __last - __middle; 2451 if (__m1 == __m2) 2452 { 2453 _VSTD::swap_ranges(__first, __middle, __middle); 2454 return __middle; 2455 } 2456 const difference_type __g = _VSTD::__gcd(__m1, __m2); 2457 for (_RandomAccessIterator __p = __first + __g; __p != __first;) 2458 { 2459 value_type __t(_VSTD::move(*--__p)); 2460 _RandomAccessIterator __p1 = __p; 2461 _RandomAccessIterator __p2 = __p1 + __m1; 2462 do 2463 { 2464 *__p1 = _VSTD::move(*__p2); 2465 __p1 = __p2; 2466 const difference_type __d = __last - __p2; 2467 if (__m1 < __d) 2468 __p2 += __m1; 2469 else 2470 __p2 = __first + (__m1 - __d); 2471 } while (__p2 != __p); 2472 *__p1 = _VSTD::move(__t); 2473 } 2474 return __first + __m2; 2475} 2476 2477template <class _ForwardIterator> 2478inline _LIBCPP_INLINE_VISIBILITY 2479_ForwardIterator 2480__rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 2481 _VSTD::forward_iterator_tag) 2482{ 2483 typedef typename _VSTD::iterator_traits<_ForwardIterator>::value_type value_type; 2484 if (_VSTD::is_trivially_move_assignable<value_type>::value) 2485 { 2486 if (_VSTD::next(__first) == __middle) 2487 return _VSTD::__rotate_left(__first, __last); 2488 } 2489 return _VSTD::__rotate_forward(__first, __middle, __last); 2490} 2491 2492template <class _BidirectionalIterator> 2493inline _LIBCPP_INLINE_VISIBILITY 2494_BidirectionalIterator 2495__rotate(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 2496 _VSTD::bidirectional_iterator_tag) 2497{ 2498 typedef typename _VSTD::iterator_traits<_BidirectionalIterator>::value_type value_type; 2499 if (_VSTD::is_trivially_move_assignable<value_type>::value) 2500 { 2501 if (_VSTD::next(__first) == __middle) 2502 return _VSTD::__rotate_left(__first, __last); 2503 if (_VSTD::next(__middle) == __last) 2504 return _VSTD::__rotate_right(__first, __last); 2505 } 2506 return _VSTD::__rotate_forward(__first, __middle, __last); 2507} 2508 2509template <class _RandomAccessIterator> 2510inline _LIBCPP_INLINE_VISIBILITY 2511_RandomAccessIterator 2512__rotate(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, 2513 _VSTD::random_access_iterator_tag) 2514{ 2515 typedef typename _VSTD::iterator_traits<_RandomAccessIterator>::value_type value_type; 2516 if (_VSTD::is_trivially_move_assignable<value_type>::value) 2517 { 2518 if (_VSTD::next(__first) == __middle) 2519 return _VSTD::__rotate_left(__first, __last); 2520 if (_VSTD::next(__middle) == __last) 2521 return _VSTD::__rotate_right(__first, __last); 2522 return _VSTD::__rotate_gcd(__first, __middle, __last); 2523 } 2524 return _VSTD::__rotate_forward(__first, __middle, __last); 2525} 2526 2527template <class _ForwardIterator> 2528inline _LIBCPP_INLINE_VISIBILITY 2529_ForwardIterator 2530rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) 2531{ 2532 if (__first == __middle) 2533 return __last; 2534 if (__middle == __last) 2535 return __first; 2536 return _VSTD::__rotate(__first, __middle, __last, 2537 typename _VSTD::iterator_traits<_ForwardIterator>::iterator_category()); 2538} 2539 2540// rotate_copy 2541 2542template <class _ForwardIterator, class _OutputIterator> 2543inline _LIBCPP_INLINE_VISIBILITY 2544_OutputIterator 2545rotate_copy(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, _OutputIterator __result) 2546{ 2547 return _VSTD::copy(__first, __middle, _VSTD::copy(__middle, __last, __result)); 2548} 2549 2550// min_element 2551 2552template <class _ForwardIterator, class _Compare> 2553inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2554_ForwardIterator 2555min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 2556{ 2557 if (__first != __last) 2558 { 2559 _ForwardIterator __i = __first; 2560 while (++__i != __last) 2561 if (__comp(*__i, *__first)) 2562 __first = __i; 2563 } 2564 return __first; 2565} 2566 2567template <class _ForwardIterator> 2568inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2569_ForwardIterator 2570min_element(_ForwardIterator __first, _ForwardIterator __last) 2571{ 2572 return _VSTD::min_element(__first, __last, 2573 __less<typename iterator_traits<_ForwardIterator>::value_type>()); 2574} 2575 2576// min 2577 2578template <class _Tp, class _Compare> 2579inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2580const _Tp& 2581min(const _Tp& __a, const _Tp& __b, _Compare __comp) 2582{ 2583 return __comp(__b, __a) ? __b : __a; 2584} 2585 2586template <class _Tp> 2587inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2588const _Tp& 2589min(const _Tp& __a, const _Tp& __b) 2590{ 2591 return _VSTD::min(__a, __b, __less<_Tp>()); 2592} 2593 2594#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 2595 2596template<class _Tp, class _Compare> 2597inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2598_Tp 2599min(initializer_list<_Tp> __t, _Compare __comp) 2600{ 2601 return *_VSTD::min_element(__t.begin(), __t.end(), __comp); 2602} 2603 2604template<class _Tp> 2605inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2606_Tp 2607min(initializer_list<_Tp> __t) 2608{ 2609 return *_VSTD::min_element(__t.begin(), __t.end(), __less<_Tp>()); 2610} 2611 2612#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 2613 2614// max_element 2615 2616template <class _ForwardIterator, class _Compare> 2617inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2618_ForwardIterator 2619max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 2620{ 2621 if (__first != __last) 2622 { 2623 _ForwardIterator __i = __first; 2624 while (++__i != __last) 2625 if (__comp(*__first, *__i)) 2626 __first = __i; 2627 } 2628 return __first; 2629} 2630 2631 2632template <class _ForwardIterator> 2633inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2634_ForwardIterator 2635max_element(_ForwardIterator __first, _ForwardIterator __last) 2636{ 2637 return _VSTD::max_element(__first, __last, 2638 __less<typename iterator_traits<_ForwardIterator>::value_type>()); 2639} 2640 2641// max 2642 2643template <class _Tp, class _Compare> 2644inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2645const _Tp& 2646max(const _Tp& __a, const _Tp& __b, _Compare __comp) 2647{ 2648 return __comp(__a, __b) ? __b : __a; 2649} 2650 2651template <class _Tp> 2652inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2653const _Tp& 2654max(const _Tp& __a, const _Tp& __b) 2655{ 2656 return _VSTD::max(__a, __b, __less<_Tp>()); 2657} 2658 2659#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 2660 2661template<class _Tp, class _Compare> 2662inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2663_Tp 2664max(initializer_list<_Tp> __t, _Compare __comp) 2665{ 2666 return *_VSTD::max_element(__t.begin(), __t.end(), __comp); 2667} 2668 2669template<class _Tp> 2670inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2671_Tp 2672max(initializer_list<_Tp> __t) 2673{ 2674 return *_VSTD::max_element(__t.begin(), __t.end(), __less<_Tp>()); 2675} 2676 2677#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 2678 2679// minmax_element 2680 2681template <class _ForwardIterator, class _Compare> 2682_LIBCPP_CONSTEXPR_AFTER_CXX11 2683std::pair<_ForwardIterator, _ForwardIterator> 2684minmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 2685{ 2686 std::pair<_ForwardIterator, _ForwardIterator> __result(__first, __first); 2687 if (__first != __last) 2688 { 2689 if (++__first != __last) 2690 { 2691 if (__comp(*__first, *__result.first)) 2692 __result.first = __first; 2693 else 2694 __result.second = __first; 2695 while (++__first != __last) 2696 { 2697 _ForwardIterator __i = __first; 2698 if (++__first == __last) 2699 { 2700 if (__comp(*__i, *__result.first)) 2701 __result.first = __i; 2702 else if (!__comp(*__i, *__result.second)) 2703 __result.second = __i; 2704 break; 2705 } 2706 else 2707 { 2708 if (__comp(*__first, *__i)) 2709 { 2710 if (__comp(*__first, *__result.first)) 2711 __result.first = __first; 2712 if (!__comp(*__i, *__result.second)) 2713 __result.second = __i; 2714 } 2715 else 2716 { 2717 if (__comp(*__i, *__result.first)) 2718 __result.first = __i; 2719 if (!__comp(*__first, *__result.second)) 2720 __result.second = __first; 2721 } 2722 } 2723 } 2724 } 2725 } 2726 return __result; 2727} 2728 2729template <class _ForwardIterator> 2730inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2731std::pair<_ForwardIterator, _ForwardIterator> 2732minmax_element(_ForwardIterator __first, _ForwardIterator __last) 2733{ 2734 return _VSTD::minmax_element(__first, __last, 2735 __less<typename iterator_traits<_ForwardIterator>::value_type>()); 2736} 2737 2738// minmax 2739 2740template<class _Tp, class _Compare> 2741inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2742pair<const _Tp&, const _Tp&> 2743minmax(const _Tp& __a, const _Tp& __b, _Compare __comp) 2744{ 2745 return __comp(__b, __a) ? pair<const _Tp&, const _Tp&>(__b, __a) : 2746 pair<const _Tp&, const _Tp&>(__a, __b); 2747} 2748 2749template<class _Tp> 2750inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2751pair<const _Tp&, const _Tp&> 2752minmax(const _Tp& __a, const _Tp& __b) 2753{ 2754 return _VSTD::minmax(__a, __b, __less<_Tp>()); 2755} 2756 2757#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 2758 2759template<class _Tp, class _Compare> 2760inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2761pair<_Tp, _Tp> 2762minmax(initializer_list<_Tp> __t, _Compare __comp) 2763{ 2764 typedef typename initializer_list<_Tp>::const_iterator _Iter; 2765 _Iter __first = __t.begin(); 2766 _Iter __last = __t.end(); 2767 std::pair<_Tp, _Tp> __result(*__first, *__first); 2768 2769 ++__first; 2770 if (__t.size() % 2 == 0) 2771 { 2772 if (__comp(*__first, __result.first)) 2773 __result.first = *__first; 2774 else 2775 __result.second = *__first; 2776 ++__first; 2777 } 2778 2779 while (__first != __last) 2780 { 2781 _Tp __prev = *__first++; 2782 if (__comp(*__first, __prev)) { 2783 if ( __comp(*__first, __result.first)) __result.first = *__first; 2784 if (!__comp(__prev, __result.second)) __result.second = __prev; 2785 } 2786 else { 2787 if ( __comp(__prev, __result.first)) __result.first = __prev; 2788 if (!__comp(*__first, __result.second)) __result.second = *__first; 2789 } 2790 2791 __first++; 2792 } 2793 return __result; 2794} 2795 2796template<class _Tp> 2797inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 2798pair<_Tp, _Tp> 2799minmax(initializer_list<_Tp> __t) 2800{ 2801 return _VSTD::minmax(__t, __less<_Tp>()); 2802} 2803 2804#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 2805 2806// random_shuffle 2807 2808// __independent_bits_engine 2809 2810template <unsigned long long _Xp, size_t _Rp> 2811struct __log2_imp 2812{ 2813 static const size_t value = _Xp & ((unsigned long long)(1) << _Rp) ? _Rp 2814 : __log2_imp<_Xp, _Rp - 1>::value; 2815}; 2816 2817template <unsigned long long _Xp> 2818struct __log2_imp<_Xp, 0> 2819{ 2820 static const size_t value = 0; 2821}; 2822 2823template <size_t _Rp> 2824struct __log2_imp<0, _Rp> 2825{ 2826 static const size_t value = _Rp + 1; 2827}; 2828 2829template <class _UI, _UI _Xp> 2830struct __log2 2831{ 2832 static const size_t value = __log2_imp<_Xp, 2833 sizeof(_UI) * __CHAR_BIT__ - 1>::value; 2834}; 2835 2836template<class _Engine, class _UIntType> 2837class __independent_bits_engine 2838{ 2839public: 2840 // types 2841 typedef _UIntType result_type; 2842 2843private: 2844 typedef typename _Engine::result_type _Engine_result_type; 2845 typedef typename conditional 2846 < 2847 sizeof(_Engine_result_type) <= sizeof(result_type), 2848 result_type, 2849 _Engine_result_type 2850 >::type _Working_result_type; 2851 2852 _Engine& __e_; 2853 size_t __w_; 2854 size_t __w0_; 2855 size_t __n_; 2856 size_t __n0_; 2857 _Working_result_type __y0_; 2858 _Working_result_type __y1_; 2859 _Engine_result_type __mask0_; 2860 _Engine_result_type __mask1_; 2861 2862#ifdef _LIBCPP_HAS_NO_CONSTEXPR 2863 static const _Working_result_type _Rp = _Engine::_Max - _Engine::_Min 2864 + _Working_result_type(1); 2865#else 2866 static _LIBCPP_CONSTEXPR const _Working_result_type _Rp = _Engine::max() - _Engine::min() 2867 + _Working_result_type(1); 2868#endif 2869 static _LIBCPP_CONSTEXPR const size_t __m = __log2<_Working_result_type, _Rp>::value; 2870 static _LIBCPP_CONSTEXPR const size_t _WDt = numeric_limits<_Working_result_type>::digits; 2871 static _LIBCPP_CONSTEXPR const size_t _EDt = numeric_limits<_Engine_result_type>::digits; 2872 2873public: 2874 // constructors and seeding functions 2875 __independent_bits_engine(_Engine& __e, size_t __w); 2876 2877 // generating functions 2878 result_type operator()() {return __eval(integral_constant<bool, _Rp != 0>());} 2879 2880private: 2881 result_type __eval(false_type); 2882 result_type __eval(true_type); 2883}; 2884 2885template<class _Engine, class _UIntType> 2886__independent_bits_engine<_Engine, _UIntType> 2887 ::__independent_bits_engine(_Engine& __e, size_t __w) 2888 : __e_(__e), 2889 __w_(__w) 2890{ 2891 __n_ = __w_ / __m + (__w_ % __m != 0); 2892 __w0_ = __w_ / __n_; 2893 if (_Rp == 0) 2894 __y0_ = _Rp; 2895 else if (__w0_ < _WDt) 2896 __y0_ = (_Rp >> __w0_) << __w0_; 2897 else 2898 __y0_ = 0; 2899 if (_Rp - __y0_ > __y0_ / __n_) 2900 { 2901 ++__n_; 2902 __w0_ = __w_ / __n_; 2903 if (__w0_ < _WDt) 2904 __y0_ = (_Rp >> __w0_) << __w0_; 2905 else 2906 __y0_ = 0; 2907 } 2908 __n0_ = __n_ - __w_ % __n_; 2909 if (__w0_ < _WDt - 1) 2910 __y1_ = (_Rp >> (__w0_ + 1)) << (__w0_ + 1); 2911 else 2912 __y1_ = 0; 2913 __mask0_ = __w0_ > 0 ? _Engine_result_type(~0) >> (_EDt - __w0_) : 2914 _Engine_result_type(0); 2915 __mask1_ = __w0_ < _EDt - 1 ? 2916 _Engine_result_type(~0) >> (_EDt - (__w0_ + 1)) : 2917 _Engine_result_type(~0); 2918} 2919 2920template<class _Engine, class _UIntType> 2921inline 2922_UIntType 2923__independent_bits_engine<_Engine, _UIntType>::__eval(false_type) 2924{ 2925 return static_cast<result_type>(__e_() & __mask0_); 2926} 2927 2928template<class _Engine, class _UIntType> 2929_UIntType 2930__independent_bits_engine<_Engine, _UIntType>::__eval(true_type) 2931{ 2932 result_type _Sp = 0; 2933 for (size_t __k = 0; __k < __n0_; ++__k) 2934 { 2935 _Engine_result_type __u; 2936 do 2937 { 2938 __u = __e_() - _Engine::min(); 2939 } while (__u >= __y0_); 2940 if (__w0_ < _WDt) 2941 _Sp <<= __w0_; 2942 else 2943 _Sp = 0; 2944 _Sp += __u & __mask0_; 2945 } 2946 for (size_t __k = __n0_; __k < __n_; ++__k) 2947 { 2948 _Engine_result_type __u; 2949 do 2950 { 2951 __u = __e_() - _Engine::min(); 2952 } while (__u >= __y1_); 2953 if (__w0_ < _WDt - 1) 2954 _Sp <<= __w0_ + 1; 2955 else 2956 _Sp = 0; 2957 _Sp += __u & __mask1_; 2958 } 2959 return _Sp; 2960} 2961 2962// uniform_int_distribution 2963 2964template<class _IntType = int> 2965class uniform_int_distribution 2966{ 2967public: 2968 // types 2969 typedef _IntType result_type; 2970 2971 class param_type 2972 { 2973 result_type __a_; 2974 result_type __b_; 2975 public: 2976 typedef uniform_int_distribution distribution_type; 2977 2978 explicit param_type(result_type __a = 0, 2979 result_type __b = numeric_limits<result_type>::max()) 2980 : __a_(__a), __b_(__b) {} 2981 2982 result_type a() const {return __a_;} 2983 result_type b() const {return __b_;} 2984 2985 friend bool operator==(const param_type& __x, const param_type& __y) 2986 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 2987 friend bool operator!=(const param_type& __x, const param_type& __y) 2988 {return !(__x == __y);} 2989 }; 2990 2991private: 2992 param_type __p_; 2993 2994public: 2995 // constructors and reset functions 2996 explicit uniform_int_distribution(result_type __a = 0, 2997 result_type __b = numeric_limits<result_type>::max()) 2998 : __p_(param_type(__a, __b)) {} 2999 explicit uniform_int_distribution(const param_type& __p) : __p_(__p) {} 3000 void reset() {} 3001 3002 // generating functions 3003 template<class _URNG> result_type operator()(_URNG& __g) 3004 {return (*this)(__g, __p_);} 3005 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 3006 3007 // property functions 3008 result_type a() const {return __p_.a();} 3009 result_type b() const {return __p_.b();} 3010 3011 param_type param() const {return __p_;} 3012 void param(const param_type& __p) {__p_ = __p;} 3013 3014 result_type min() const {return a();} 3015 result_type max() const {return b();} 3016 3017 friend bool operator==(const uniform_int_distribution& __x, 3018 const uniform_int_distribution& __y) 3019 {return __x.__p_ == __y.__p_;} 3020 friend bool operator!=(const uniform_int_distribution& __x, 3021 const uniform_int_distribution& __y) 3022 {return !(__x == __y);} 3023}; 3024 3025template<class _IntType> 3026template<class _URNG> 3027typename uniform_int_distribution<_IntType>::result_type 3028uniform_int_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p) 3029{ 3030 typedef typename conditional<sizeof(result_type) <= sizeof(uint32_t), 3031 uint32_t, uint64_t>::type _UIntType; 3032 const _UIntType _Rp = __p.b() - __p.a() + _UIntType(1); 3033 if (_Rp == 1) 3034 return __p.a(); 3035 const size_t _Dt = numeric_limits<_UIntType>::digits; 3036 typedef __independent_bits_engine<_URNG, _UIntType> _Eng; 3037 if (_Rp == 0) 3038 return static_cast<result_type>(_Eng(__g, _Dt)()); 3039 size_t __w = _Dt - __clz(_Rp) - 1; 3040 if ((_Rp & (_UIntType(~0) >> (_Dt - __w))) != 0) 3041 ++__w; 3042 _Eng __e(__g, __w); 3043 _UIntType __u; 3044 do 3045 { 3046 __u = __e(); 3047 } while (__u >= _Rp); 3048 return static_cast<result_type>(__u + __p.a()); 3049} 3050 3051class _LIBCPP_TYPE_VIS __rs_default; 3052 3053_LIBCPP_FUNC_VIS __rs_default __rs_get(); 3054 3055class _LIBCPP_TYPE_VIS __rs_default 3056{ 3057 static unsigned __c_; 3058 3059 __rs_default(); 3060public: 3061 typedef uint_fast32_t result_type; 3062 3063 static const result_type _Min = 0; 3064 static const result_type _Max = 0xFFFFFFFF; 3065 3066 __rs_default(const __rs_default&); 3067 ~__rs_default(); 3068 3069 result_type operator()(); 3070 3071 static _LIBCPP_CONSTEXPR result_type min() {return _Min;} 3072 static _LIBCPP_CONSTEXPR result_type max() {return _Max;} 3073 3074 friend _LIBCPP_FUNC_VIS __rs_default __rs_get(); 3075}; 3076 3077_LIBCPP_FUNC_VIS __rs_default __rs_get(); 3078 3079template <class _RandomAccessIterator> 3080void 3081random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last) 3082{ 3083 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 3084 typedef uniform_int_distribution<ptrdiff_t> _Dp; 3085 typedef typename _Dp::param_type _Pp; 3086 difference_type __d = __last - __first; 3087 if (__d > 1) 3088 { 3089 _Dp __uid; 3090 __rs_default __g = __rs_get(); 3091 for (--__last, --__d; __first < __last; ++__first, --__d) 3092 { 3093 difference_type __i = __uid(__g, _Pp(0, __d)); 3094 if (__i != difference_type(0)) 3095 swap(*__first, *(__first + __i)); 3096 } 3097 } 3098} 3099 3100template <class _RandomAccessIterator, class _RandomNumberGenerator> 3101void 3102random_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, 3103#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3104 _RandomNumberGenerator&& __rand) 3105#else 3106 _RandomNumberGenerator& __rand) 3107#endif 3108{ 3109 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 3110 difference_type __d = __last - __first; 3111 if (__d > 1) 3112 { 3113 for (--__last; __first < __last; ++__first, --__d) 3114 { 3115 difference_type __i = __rand(__d); 3116 swap(*__first, *(__first + __i)); 3117 } 3118 } 3119} 3120 3121template<class _RandomAccessIterator, class _UniformRandomNumberGenerator> 3122 void shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, 3123#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3124 _UniformRandomNumberGenerator&& __g) 3125#else 3126 _UniformRandomNumberGenerator& __g) 3127#endif 3128{ 3129 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 3130 typedef uniform_int_distribution<ptrdiff_t> _Dp; 3131 typedef typename _Dp::param_type _Pp; 3132 difference_type __d = __last - __first; 3133 if (__d > 1) 3134 { 3135 _Dp __uid; 3136 for (--__last, --__d; __first < __last; ++__first, --__d) 3137 { 3138 difference_type __i = __uid(__g, _Pp(0, __d)); 3139 if (__i != difference_type(0)) 3140 swap(*__first, *(__first + __i)); 3141 } 3142 } 3143} 3144 3145template <class _InputIterator, class _Predicate> 3146bool 3147is_partitioned(_InputIterator __first, _InputIterator __last, _Predicate __pred) 3148{ 3149 for (; __first != __last; ++__first) 3150 if (!__pred(*__first)) 3151 break; 3152 if ( __first == __last ) 3153 return true; 3154 ++__first; 3155 for (; __first != __last; ++__first) 3156 if (__pred(*__first)) 3157 return false; 3158 return true; 3159} 3160 3161// partition 3162 3163template <class _Predicate, class _ForwardIterator> 3164_ForwardIterator 3165__partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, forward_iterator_tag) 3166{ 3167 while (true) 3168 { 3169 if (__first == __last) 3170 return __first; 3171 if (!__pred(*__first)) 3172 break; 3173 ++__first; 3174 } 3175 for (_ForwardIterator __p = __first; ++__p != __last;) 3176 { 3177 if (__pred(*__p)) 3178 { 3179 swap(*__first, *__p); 3180 ++__first; 3181 } 3182 } 3183 return __first; 3184} 3185 3186template <class _Predicate, class _BidirectionalIterator> 3187_BidirectionalIterator 3188__partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, 3189 bidirectional_iterator_tag) 3190{ 3191 while (true) 3192 { 3193 while (true) 3194 { 3195 if (__first == __last) 3196 return __first; 3197 if (!__pred(*__first)) 3198 break; 3199 ++__first; 3200 } 3201 do 3202 { 3203 if (__first == --__last) 3204 return __first; 3205 } while (!__pred(*__last)); 3206 swap(*__first, *__last); 3207 ++__first; 3208 } 3209} 3210 3211template <class _ForwardIterator, class _Predicate> 3212inline _LIBCPP_INLINE_VISIBILITY 3213_ForwardIterator 3214partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 3215{ 3216 return _VSTD::__partition<typename add_lvalue_reference<_Predicate>::type> 3217 (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); 3218} 3219 3220// partition_copy 3221 3222template <class _InputIterator, class _OutputIterator1, 3223 class _OutputIterator2, class _Predicate> 3224pair<_OutputIterator1, _OutputIterator2> 3225partition_copy(_InputIterator __first, _InputIterator __last, 3226 _OutputIterator1 __out_true, _OutputIterator2 __out_false, 3227 _Predicate __pred) 3228{ 3229 for (; __first != __last; ++__first) 3230 { 3231 if (__pred(*__first)) 3232 { 3233 *__out_true = *__first; 3234 ++__out_true; 3235 } 3236 else 3237 { 3238 *__out_false = *__first; 3239 ++__out_false; 3240 } 3241 } 3242 return pair<_OutputIterator1, _OutputIterator2>(__out_true, __out_false); 3243} 3244 3245// partition_point 3246 3247template<class _ForwardIterator, class _Predicate> 3248_ForwardIterator 3249partition_point(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 3250{ 3251 typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 3252 difference_type __len = _VSTD::distance(__first, __last); 3253 while (__len != 0) 3254 { 3255 difference_type __l2 = __len / 2; 3256 _ForwardIterator __m = __first; 3257 _VSTD::advance(__m, __l2); 3258 if (__pred(*__m)) 3259 { 3260 __first = ++__m; 3261 __len -= __l2 + 1; 3262 } 3263 else 3264 __len = __l2; 3265 } 3266 return __first; 3267} 3268 3269// stable_partition 3270 3271template <class _Predicate, class _ForwardIterator, class _Distance, class _Pair> 3272_ForwardIterator 3273__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 3274 _Distance __len, _Pair __p, forward_iterator_tag __fit) 3275{ 3276 // *__first is known to be false 3277 // __len >= 1 3278 if (__len == 1) 3279 return __first; 3280 if (__len == 2) 3281 { 3282 _ForwardIterator __m = __first; 3283 if (__pred(*++__m)) 3284 { 3285 swap(*__first, *__m); 3286 return __m; 3287 } 3288 return __first; 3289 } 3290 if (__len <= __p.second) 3291 { // The buffer is big enough to use 3292 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3293 __destruct_n __d(0); 3294 unique_ptr<value_type, __destruct_n&> __h(__p.first, __d); 3295 // Move the falses into the temporary buffer, and the trues to the front of the line 3296 // Update __first to always point to the end of the trues 3297 value_type* __t = __p.first; 3298 ::new(__t) value_type(_VSTD::move(*__first)); 3299 __d.__incr((value_type*)0); 3300 ++__t; 3301 _ForwardIterator __i = __first; 3302 while (++__i != __last) 3303 { 3304 if (__pred(*__i)) 3305 { 3306 *__first = _VSTD::move(*__i); 3307 ++__first; 3308 } 3309 else 3310 { 3311 ::new(__t) value_type(_VSTD::move(*__i)); 3312 __d.__incr((value_type*)0); 3313 ++__t; 3314 } 3315 } 3316 // All trues now at start of range, all falses in buffer 3317 // Move falses back into range, but don't mess up __first which points to first false 3318 __i = __first; 3319 for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, ++__i) 3320 *__i = _VSTD::move(*__t2); 3321 // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer 3322 return __first; 3323 } 3324 // Else not enough buffer, do in place 3325 // __len >= 3 3326 _ForwardIterator __m = __first; 3327 _Distance __len2 = __len / 2; // __len2 >= 2 3328 _VSTD::advance(__m, __len2); 3329 // recurse on [__first, __m), *__first know to be false 3330 // F????????????????? 3331 // f m l 3332 typedef typename add_lvalue_reference<_Predicate>::type _PredRef; 3333 _ForwardIterator __first_false = __stable_partition<_PredRef>(__first, __m, __pred, __len2, __p, __fit); 3334 // TTTFFFFF?????????? 3335 // f ff m l 3336 // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true 3337 _ForwardIterator __m1 = __m; 3338 _ForwardIterator __second_false = __last; 3339 _Distance __len_half = __len - __len2; 3340 while (__pred(*__m1)) 3341 { 3342 if (++__m1 == __last) 3343 goto __second_half_done; 3344 --__len_half; 3345 } 3346 // TTTFFFFFTTTF?????? 3347 // f ff m m1 l 3348 __second_false = __stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __fit); 3349__second_half_done: 3350 // TTTFFFFFTTTTTFFFFF 3351 // f ff m sf l 3352 return _VSTD::rotate(__first_false, __m, __second_false); 3353 // TTTTTTTTFFFFFFFFFF 3354 // | 3355} 3356 3357struct __return_temporary_buffer 3358{ 3359 template <class _Tp> 3360 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) const {_VSTD::return_temporary_buffer(__p);} 3361}; 3362 3363template <class _Predicate, class _ForwardIterator> 3364_ForwardIterator 3365__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 3366 forward_iterator_tag) 3367{ 3368 const unsigned __alloc_limit = 3; // might want to make this a function of trivial assignment 3369 // Either prove all true and return __first or point to first false 3370 while (true) 3371 { 3372 if (__first == __last) 3373 return __first; 3374 if (!__pred(*__first)) 3375 break; 3376 ++__first; 3377 } 3378 // We now have a reduced range [__first, __last) 3379 // *__first is known to be false 3380 typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 3381 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3382 difference_type __len = _VSTD::distance(__first, __last); 3383 pair<value_type*, ptrdiff_t> __p(0, 0); 3384 unique_ptr<value_type, __return_temporary_buffer> __h; 3385 if (__len >= __alloc_limit) 3386 { 3387 __p = _VSTD::get_temporary_buffer<value_type>(__len); 3388 __h.reset(__p.first); 3389 } 3390 return __stable_partition<typename add_lvalue_reference<_Predicate>::type> 3391 (__first, __last, __pred, __len, __p, forward_iterator_tag()); 3392} 3393 3394template <class _Predicate, class _BidirectionalIterator, class _Distance, class _Pair> 3395_BidirectionalIterator 3396__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, 3397 _Distance __len, _Pair __p, bidirectional_iterator_tag __bit) 3398{ 3399 // *__first is known to be false 3400 // *__last is known to be true 3401 // __len >= 2 3402 if (__len == 2) 3403 { 3404 swap(*__first, *__last); 3405 return __last; 3406 } 3407 if (__len == 3) 3408 { 3409 _BidirectionalIterator __m = __first; 3410 if (__pred(*++__m)) 3411 { 3412 swap(*__first, *__m); 3413 swap(*__m, *__last); 3414 return __last; 3415 } 3416 swap(*__m, *__last); 3417 swap(*__first, *__m); 3418 return __m; 3419 } 3420 if (__len <= __p.second) 3421 { // The buffer is big enough to use 3422 typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 3423 __destruct_n __d(0); 3424 unique_ptr<value_type, __destruct_n&> __h(__p.first, __d); 3425 // Move the falses into the temporary buffer, and the trues to the front of the line 3426 // Update __first to always point to the end of the trues 3427 value_type* __t = __p.first; 3428 ::new(__t) value_type(_VSTD::move(*__first)); 3429 __d.__incr((value_type*)0); 3430 ++__t; 3431 _BidirectionalIterator __i = __first; 3432 while (++__i != __last) 3433 { 3434 if (__pred(*__i)) 3435 { 3436 *__first = _VSTD::move(*__i); 3437 ++__first; 3438 } 3439 else 3440 { 3441 ::new(__t) value_type(_VSTD::move(*__i)); 3442 __d.__incr((value_type*)0); 3443 ++__t; 3444 } 3445 } 3446 // move *__last, known to be true 3447 *__first = _VSTD::move(*__i); 3448 __i = ++__first; 3449 // All trues now at start of range, all falses in buffer 3450 // Move falses back into range, but don't mess up __first which points to first false 3451 for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, ++__i) 3452 *__i = _VSTD::move(*__t2); 3453 // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer 3454 return __first; 3455 } 3456 // Else not enough buffer, do in place 3457 // __len >= 4 3458 _BidirectionalIterator __m = __first; 3459 _Distance __len2 = __len / 2; // __len2 >= 2 3460 _VSTD::advance(__m, __len2); 3461 // recurse on [__first, __m-1], except reduce __m-1 until *(__m-1) is true, *__first know to be false 3462 // F????????????????T 3463 // f m l 3464 _BidirectionalIterator __m1 = __m; 3465 _BidirectionalIterator __first_false = __first; 3466 _Distance __len_half = __len2; 3467 while (!__pred(*--__m1)) 3468 { 3469 if (__m1 == __first) 3470 goto __first_half_done; 3471 --__len_half; 3472 } 3473 // F???TFFF?????????T 3474 // f m1 m l 3475 typedef typename add_lvalue_reference<_Predicate>::type _PredRef; 3476 __first_false = __stable_partition<_PredRef>(__first, __m1, __pred, __len_half, __p, __bit); 3477__first_half_done: 3478 // TTTFFFFF?????????T 3479 // f ff m l 3480 // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true 3481 __m1 = __m; 3482 _BidirectionalIterator __second_false = __last; 3483 ++__second_false; 3484 __len_half = __len - __len2; 3485 while (__pred(*__m1)) 3486 { 3487 if (++__m1 == __last) 3488 goto __second_half_done; 3489 --__len_half; 3490 } 3491 // TTTFFFFFTTTF?????T 3492 // f ff m m1 l 3493 __second_false = __stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __bit); 3494__second_half_done: 3495 // TTTFFFFFTTTTTFFFFF 3496 // f ff m sf l 3497 return _VSTD::rotate(__first_false, __m, __second_false); 3498 // TTTTTTTTFFFFFFFFFF 3499 // | 3500} 3501 3502template <class _Predicate, class _BidirectionalIterator> 3503_BidirectionalIterator 3504__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, 3505 bidirectional_iterator_tag) 3506{ 3507 typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; 3508 typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 3509 const difference_type __alloc_limit = 4; // might want to make this a function of trivial assignment 3510 // Either prove all true and return __first or point to first false 3511 while (true) 3512 { 3513 if (__first == __last) 3514 return __first; 3515 if (!__pred(*__first)) 3516 break; 3517 ++__first; 3518 } 3519 // __first points to first false, everything prior to __first is already set. 3520 // Either prove [__first, __last) is all false and return __first, or point __last to last true 3521 do 3522 { 3523 if (__first == --__last) 3524 return __first; 3525 } while (!__pred(*__last)); 3526 // We now have a reduced range [__first, __last] 3527 // *__first is known to be false 3528 // *__last is known to be true 3529 // __len >= 2 3530 difference_type __len = _VSTD::distance(__first, __last) + 1; 3531 pair<value_type*, ptrdiff_t> __p(0, 0); 3532 unique_ptr<value_type, __return_temporary_buffer> __h; 3533 if (__len >= __alloc_limit) 3534 { 3535 __p = _VSTD::get_temporary_buffer<value_type>(__len); 3536 __h.reset(__p.first); 3537 } 3538 return __stable_partition<typename add_lvalue_reference<_Predicate>::type> 3539 (__first, __last, __pred, __len, __p, bidirectional_iterator_tag()); 3540} 3541 3542template <class _ForwardIterator, class _Predicate> 3543inline _LIBCPP_INLINE_VISIBILITY 3544_ForwardIterator 3545stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 3546{ 3547 return __stable_partition<typename add_lvalue_reference<_Predicate>::type> 3548 (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); 3549} 3550 3551// is_sorted_until 3552 3553template <class _ForwardIterator, class _Compare> 3554_ForwardIterator 3555is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 3556{ 3557 if (__first != __last) 3558 { 3559 _ForwardIterator __i = __first; 3560 while (++__i != __last) 3561 { 3562 if (__comp(*__i, *__first)) 3563 return __i; 3564 __first = __i; 3565 } 3566 } 3567 return __last; 3568} 3569 3570template<class _ForwardIterator> 3571inline _LIBCPP_INLINE_VISIBILITY 3572_ForwardIterator 3573is_sorted_until(_ForwardIterator __first, _ForwardIterator __last) 3574{ 3575 return _VSTD::is_sorted_until(__first, __last, __less<typename iterator_traits<_ForwardIterator>::value_type>()); 3576} 3577 3578// is_sorted 3579 3580template <class _ForwardIterator, class _Compare> 3581inline _LIBCPP_INLINE_VISIBILITY 3582bool 3583is_sorted(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 3584{ 3585 return _VSTD::is_sorted_until(__first, __last, __comp) == __last; 3586} 3587 3588template<class _ForwardIterator> 3589inline _LIBCPP_INLINE_VISIBILITY 3590bool 3591is_sorted(_ForwardIterator __first, _ForwardIterator __last) 3592{ 3593 return _VSTD::is_sorted(__first, __last, __less<typename iterator_traits<_ForwardIterator>::value_type>()); 3594} 3595 3596// sort 3597 3598// stable, 2-3 compares, 0-2 swaps 3599 3600template <class _Compare, class _ForwardIterator> 3601unsigned 3602__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c) 3603{ 3604 unsigned __r = 0; 3605 if (!__c(*__y, *__x)) // if x <= y 3606 { 3607 if (!__c(*__z, *__y)) // if y <= z 3608 return __r; // x <= y && y <= z 3609 // x <= y && y > z 3610 swap(*__y, *__z); // x <= z && y < z 3611 __r = 1; 3612 if (__c(*__y, *__x)) // if x > y 3613 { 3614 swap(*__x, *__y); // x < y && y <= z 3615 __r = 2; 3616 } 3617 return __r; // x <= y && y < z 3618 } 3619 if (__c(*__z, *__y)) // x > y, if y > z 3620 { 3621 swap(*__x, *__z); // x < y && y < z 3622 __r = 1; 3623 return __r; 3624 } 3625 swap(*__x, *__y); // x > y && y <= z 3626 __r = 1; // x < y && x <= z 3627 if (__c(*__z, *__y)) // if y > z 3628 { 3629 swap(*__y, *__z); // x <= y && y < z 3630 __r = 2; 3631 } 3632 return __r; 3633} // x <= y && y <= z 3634 3635// stable, 3-6 compares, 0-5 swaps 3636 3637template <class _Compare, class _ForwardIterator> 3638unsigned 3639__sort4(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, 3640 _ForwardIterator __x4, _Compare __c) 3641{ 3642 unsigned __r = __sort3<_Compare>(__x1, __x2, __x3, __c); 3643 if (__c(*__x4, *__x3)) 3644 { 3645 swap(*__x3, *__x4); 3646 ++__r; 3647 if (__c(*__x3, *__x2)) 3648 { 3649 swap(*__x2, *__x3); 3650 ++__r; 3651 if (__c(*__x2, *__x1)) 3652 { 3653 swap(*__x1, *__x2); 3654 ++__r; 3655 } 3656 } 3657 } 3658 return __r; 3659} 3660 3661// stable, 4-10 compares, 0-9 swaps 3662 3663template <class _Compare, class _ForwardIterator> 3664unsigned 3665__sort5(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, 3666 _ForwardIterator __x4, _ForwardIterator __x5, _Compare __c) 3667{ 3668 unsigned __r = __sort4<_Compare>(__x1, __x2, __x3, __x4, __c); 3669 if (__c(*__x5, *__x4)) 3670 { 3671 swap(*__x4, *__x5); 3672 ++__r; 3673 if (__c(*__x4, *__x3)) 3674 { 3675 swap(*__x3, *__x4); 3676 ++__r; 3677 if (__c(*__x3, *__x2)) 3678 { 3679 swap(*__x2, *__x3); 3680 ++__r; 3681 if (__c(*__x2, *__x1)) 3682 { 3683 swap(*__x1, *__x2); 3684 ++__r; 3685 } 3686 } 3687 } 3688 } 3689 return __r; 3690} 3691 3692// Assumes size > 0 3693template <class _Compare, class _BirdirectionalIterator> 3694void 3695__selection_sort(_BirdirectionalIterator __first, _BirdirectionalIterator __last, _Compare __comp) 3696{ 3697 _BirdirectionalIterator __lm1 = __last; 3698 for (--__lm1; __first != __lm1; ++__first) 3699 { 3700 _BirdirectionalIterator __i = _VSTD::min_element<_BirdirectionalIterator, 3701 typename add_lvalue_reference<_Compare>::type> 3702 (__first, __last, __comp); 3703 if (__i != __first) 3704 swap(*__first, *__i); 3705 } 3706} 3707 3708template <class _Compare, class _BirdirectionalIterator> 3709void 3710__insertion_sort(_BirdirectionalIterator __first, _BirdirectionalIterator __last, _Compare __comp) 3711{ 3712 typedef typename iterator_traits<_BirdirectionalIterator>::value_type value_type; 3713 if (__first != __last) 3714 { 3715 _BirdirectionalIterator __i = __first; 3716 for (++__i; __i != __last; ++__i) 3717 { 3718 _BirdirectionalIterator __j = __i; 3719 value_type __t(_VSTD::move(*__j)); 3720 for (_BirdirectionalIterator __k = __i; __k != __first && __comp(__t, *--__k); --__j) 3721 *__j = _VSTD::move(*__k); 3722 *__j = _VSTD::move(__t); 3723 } 3724 } 3725} 3726 3727template <class _Compare, class _RandomAccessIterator> 3728void 3729__insertion_sort_3(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 3730{ 3731 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 3732 _RandomAccessIterator __j = __first+2; 3733 __sort3<_Compare>(__first, __first+1, __j, __comp); 3734 for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) 3735 { 3736 if (__comp(*__i, *__j)) 3737 { 3738 value_type __t(_VSTD::move(*__i)); 3739 _RandomAccessIterator __k = __j; 3740 __j = __i; 3741 do 3742 { 3743 *__j = _VSTD::move(*__k); 3744 __j = __k; 3745 } while (__j != __first && __comp(__t, *--__k)); 3746 *__j = _VSTD::move(__t); 3747 } 3748 __j = __i; 3749 } 3750} 3751 3752template <class _Compare, class _RandomAccessIterator> 3753bool 3754__insertion_sort_incomplete(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 3755{ 3756 switch (__last - __first) 3757 { 3758 case 0: 3759 case 1: 3760 return true; 3761 case 2: 3762 if (__comp(*--__last, *__first)) 3763 swap(*__first, *__last); 3764 return true; 3765 case 3: 3766 _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); 3767 return true; 3768 case 4: 3769 _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); 3770 return true; 3771 case 5: 3772 _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); 3773 return true; 3774 } 3775 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 3776 _RandomAccessIterator __j = __first+2; 3777 __sort3<_Compare>(__first, __first+1, __j, __comp); 3778 const unsigned __limit = 8; 3779 unsigned __count = 0; 3780 for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) 3781 { 3782 if (__comp(*__i, *__j)) 3783 { 3784 value_type __t(_VSTD::move(*__i)); 3785 _RandomAccessIterator __k = __j; 3786 __j = __i; 3787 do 3788 { 3789 *__j = _VSTD::move(*__k); 3790 __j = __k; 3791 } while (__j != __first && __comp(__t, *--__k)); 3792 *__j = _VSTD::move(__t); 3793 if (++__count == __limit) 3794 return ++__i == __last; 3795 } 3796 __j = __i; 3797 } 3798 return true; 3799} 3800 3801template <class _Compare, class _BirdirectionalIterator> 3802void 3803__insertion_sort_move(_BirdirectionalIterator __first1, _BirdirectionalIterator __last1, 3804 typename iterator_traits<_BirdirectionalIterator>::value_type* __first2, _Compare __comp) 3805{ 3806 typedef typename iterator_traits<_BirdirectionalIterator>::value_type value_type; 3807 if (__first1 != __last1) 3808 { 3809 __destruct_n __d(0); 3810 unique_ptr<value_type, __destruct_n&> __h(__first2, __d); 3811 value_type* __last2 = __first2; 3812 ::new(__last2) value_type(_VSTD::move(*__first1)); 3813 __d.__incr((value_type*)0); 3814 for (++__last2; ++__first1 != __last1; ++__last2) 3815 { 3816 value_type* __j2 = __last2; 3817 value_type* __i2 = __j2; 3818 if (__comp(*__first1, *--__i2)) 3819 { 3820 ::new(__j2) value_type(_VSTD::move(*__i2)); 3821 __d.__incr((value_type*)0); 3822 for (--__j2; __i2 != __first2 && __comp(*__first1, *--__i2); --__j2) 3823 *__j2 = _VSTD::move(*__i2); 3824 *__j2 = _VSTD::move(*__first1); 3825 } 3826 else 3827 { 3828 ::new(__j2) value_type(_VSTD::move(*__first1)); 3829 __d.__incr((value_type*)0); 3830 } 3831 } 3832 __h.release(); 3833 } 3834} 3835 3836template <class _Compare, class _RandomAccessIterator> 3837void 3838__sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 3839{ 3840 // _Compare is known to be a reference type 3841 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 3842 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 3843 const difference_type __limit = is_trivially_copy_constructible<value_type>::value && 3844 is_trivially_copy_assignable<value_type>::value ? 30 : 6; 3845 while (true) 3846 { 3847 __restart: 3848 difference_type __len = __last - __first; 3849 switch (__len) 3850 { 3851 case 0: 3852 case 1: 3853 return; 3854 case 2: 3855 if (__comp(*--__last, *__first)) 3856 swap(*__first, *__last); 3857 return; 3858 case 3: 3859 _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); 3860 return; 3861 case 4: 3862 _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); 3863 return; 3864 case 5: 3865 _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); 3866 return; 3867 } 3868 if (__len <= __limit) 3869 { 3870 _VSTD::__insertion_sort_3<_Compare>(__first, __last, __comp); 3871 return; 3872 } 3873 // __len > 5 3874 _RandomAccessIterator __m = __first; 3875 _RandomAccessIterator __lm1 = __last; 3876 --__lm1; 3877 unsigned __n_swaps; 3878 { 3879 difference_type __delta; 3880 if (__len >= 1000) 3881 { 3882 __delta = __len/2; 3883 __m += __delta; 3884 __delta /= 2; 3885 __n_swaps = _VSTD::__sort5<_Compare>(__first, __first + __delta, __m, __m+__delta, __lm1, __comp); 3886 } 3887 else 3888 { 3889 __delta = __len/2; 3890 __m += __delta; 3891 __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, __lm1, __comp); 3892 } 3893 } 3894 // *__m is median 3895 // partition [__first, __m) < *__m and *__m <= [__m, __last) 3896 // (this inhibits tossing elements equivalent to __m around unnecessarily) 3897 _RandomAccessIterator __i = __first; 3898 _RandomAccessIterator __j = __lm1; 3899 // j points beyond range to be tested, *__m is known to be <= *__lm1 3900 // The search going up is known to be guarded but the search coming down isn't. 3901 // Prime the downward search with a guard. 3902 if (!__comp(*__i, *__m)) // if *__first == *__m 3903 { 3904 // *__first == *__m, *__first doesn't go in first part 3905 // manually guard downward moving __j against __i 3906 while (true) 3907 { 3908 if (__i == --__j) 3909 { 3910 // *__first == *__m, *__m <= all other elements 3911 // Parition instead into [__first, __i) == *__first and *__first < [__i, __last) 3912 ++__i; // __first + 1 3913 __j = __last; 3914 if (!__comp(*__first, *--__j)) // we need a guard if *__first == *(__last-1) 3915 { 3916 while (true) 3917 { 3918 if (__i == __j) 3919 return; // [__first, __last) all equivalent elements 3920 if (__comp(*__first, *__i)) 3921 { 3922 swap(*__i, *__j); 3923 ++__n_swaps; 3924 ++__i; 3925 break; 3926 } 3927 ++__i; 3928 } 3929 } 3930 // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 3931 if (__i == __j) 3932 return; 3933 while (true) 3934 { 3935 while (!__comp(*__first, *__i)) 3936 ++__i; 3937 while (__comp(*__first, *--__j)) 3938 ; 3939 if (__i >= __j) 3940 break; 3941 swap(*__i, *__j); 3942 ++__n_swaps; 3943 ++__i; 3944 } 3945 // [__first, __i) == *__first and *__first < [__i, __last) 3946 // The first part is sorted, sort the secod part 3947 // _VSTD::__sort<_Compare>(__i, __last, __comp); 3948 __first = __i; 3949 goto __restart; 3950 } 3951 if (__comp(*__j, *__m)) 3952 { 3953 swap(*__i, *__j); 3954 ++__n_swaps; 3955 break; // found guard for downward moving __j, now use unguarded partition 3956 } 3957 } 3958 } 3959 // It is known that *__i < *__m 3960 ++__i; 3961 // j points beyond range to be tested, *__m is known to be <= *__lm1 3962 // if not yet partitioned... 3963 if (__i < __j) 3964 { 3965 // known that *(__i - 1) < *__m 3966 // known that __i <= __m 3967 while (true) 3968 { 3969 // __m still guards upward moving __i 3970 while (__comp(*__i, *__m)) 3971 ++__i; 3972 // It is now known that a guard exists for downward moving __j 3973 while (!__comp(*--__j, *__m)) 3974 ; 3975 if (__i > __j) 3976 break; 3977 swap(*__i, *__j); 3978 ++__n_swaps; 3979 // It is known that __m != __j 3980 // If __m just moved, follow it 3981 if (__m == __i) 3982 __m = __j; 3983 ++__i; 3984 } 3985 } 3986 // [__first, __i) < *__m and *__m <= [__i, __last) 3987 if (__i != __m && __comp(*__m, *__i)) 3988 { 3989 swap(*__i, *__m); 3990 ++__n_swaps; 3991 } 3992 // [__first, __i) < *__i and *__i <= [__i+1, __last) 3993 // If we were given a perfect partition, see if insertion sort is quick... 3994 if (__n_swaps == 0) 3995 { 3996 bool __fs = _VSTD::__insertion_sort_incomplete<_Compare>(__first, __i, __comp); 3997 if (_VSTD::__insertion_sort_incomplete<_Compare>(__i+1, __last, __comp)) 3998 { 3999 if (__fs) 4000 return; 4001 __last = __i; 4002 continue; 4003 } 4004 else 4005 { 4006 if (__fs) 4007 { 4008 __first = ++__i; 4009 continue; 4010 } 4011 } 4012 } 4013 // sort smaller range with recursive call and larger with tail recursion elimination 4014 if (__i - __first < __last - __i) 4015 { 4016 _VSTD::__sort<_Compare>(__first, __i, __comp); 4017 // _VSTD::__sort<_Compare>(__i+1, __last, __comp); 4018 __first = ++__i; 4019 } 4020 else 4021 { 4022 _VSTD::__sort<_Compare>(__i+1, __last, __comp); 4023 // _VSTD::__sort<_Compare>(__first, __i, __comp); 4024 __last = __i; 4025 } 4026 } 4027} 4028 4029// This forwarder keeps the top call and the recursive calls using the same instantiation, forcing a reference _Compare 4030template <class _RandomAccessIterator, class _Compare> 4031inline _LIBCPP_INLINE_VISIBILITY 4032void 4033sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4034{ 4035#ifdef _LIBCPP_DEBUG 4036 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4037 __debug_less<_Compare> __c(__comp); 4038 __sort<_Comp_ref>(__first, __last, __c); 4039#else // _LIBCPP_DEBUG 4040 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4041 __sort<_Comp_ref>(__first, __last, __comp); 4042#endif // _LIBCPP_DEBUG 4043} 4044 4045template <class _RandomAccessIterator> 4046inline _LIBCPP_INLINE_VISIBILITY 4047void 4048sort(_RandomAccessIterator __first, _RandomAccessIterator __last) 4049{ 4050 _VSTD::sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 4051} 4052 4053template <class _Tp> 4054inline _LIBCPP_INLINE_VISIBILITY 4055void 4056sort(_Tp** __first, _Tp** __last) 4057{ 4058 _VSTD::sort((size_t*)__first, (size_t*)__last, __less<size_t>()); 4059} 4060 4061template <class _Tp> 4062inline _LIBCPP_INLINE_VISIBILITY 4063void 4064sort(__wrap_iter<_Tp*> __first, __wrap_iter<_Tp*> __last) 4065{ 4066 _VSTD::sort(__first.base(), __last.base()); 4067} 4068 4069template <class _Tp, class _Compare> 4070inline _LIBCPP_INLINE_VISIBILITY 4071void 4072sort(__wrap_iter<_Tp*> __first, __wrap_iter<_Tp*> __last, _Compare __comp) 4073{ 4074 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4075 _VSTD::sort<_Tp*, _Comp_ref>(__first.base(), __last.base(), __comp); 4076} 4077 4078#ifdef _LIBCPP_MSVC 4079#pragma warning( push ) 4080#pragma warning( disable: 4231) 4081#endif // _LIBCPP_MSVC 4082_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<char>&, char*>(char*, char*, __less<char>&)) 4083_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&)) 4084_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&)) 4085_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned char>&, unsigned char*>(unsigned char*, unsigned char*, __less<unsigned char>&)) 4086_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<short>&, short*>(short*, short*, __less<short>&)) 4087_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned short>&, unsigned short*>(unsigned short*, unsigned short*, __less<unsigned short>&)) 4088_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<int>&, int*>(int*, int*, __less<int>&)) 4089_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned>&, unsigned*>(unsigned*, unsigned*, __less<unsigned>&)) 4090_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<long>&, long*>(long*, long*, __less<long>&)) 4091_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&)) 4092_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<long long>&, long long*>(long long*, long long*, __less<long long>&)) 4093_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned long long>&, unsigned long long*>(unsigned long long*, unsigned long long*, __less<unsigned long long>&)) 4094_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<float>&, float*>(float*, float*, __less<float>&)) 4095_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<double>&, double*>(double*, double*, __less<double>&)) 4096_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<long double>&, long double*>(long double*, long double*, __less<long double>&)) 4097 4098_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<char>&, char*>(char*, char*, __less<char>&)) 4099_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&)) 4100_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&)) 4101_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned char>&, unsigned char*>(unsigned char*, unsigned char*, __less<unsigned char>&)) 4102_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<short>&, short*>(short*, short*, __less<short>&)) 4103_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned short>&, unsigned short*>(unsigned short*, unsigned short*, __less<unsigned short>&)) 4104_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<int>&, int*>(int*, int*, __less<int>&)) 4105_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned>&, unsigned*>(unsigned*, unsigned*, __less<unsigned>&)) 4106_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long>&, long*>(long*, long*, __less<long>&)) 4107_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&)) 4108_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long long>&, long long*>(long long*, long long*, __less<long long>&)) 4109_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned long long>&, unsigned long long*>(unsigned long long*, unsigned long long*, __less<unsigned long long>&)) 4110_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<float>&, float*>(float*, float*, __less<float>&)) 4111_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<double>&, double*>(double*, double*, __less<double>&)) 4112_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long double>&, long double*>(long double*, long double*, __less<long double>&)) 4113 4114_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS unsigned __sort5<__less<long double>&, long double*>(long double*, long double*, long double*, long double*, long double*, __less<long double>&)) 4115#ifdef _LIBCPP_MSVC 4116#pragma warning( pop ) 4117#endif // _LIBCPP_MSVC 4118 4119// lower_bound 4120 4121template <class _Compare, class _ForwardIterator, class _Tp> 4122_ForwardIterator 4123__lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4124{ 4125 typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 4126 difference_type __len = _VSTD::distance(__first, __last); 4127 while (__len != 0) 4128 { 4129 difference_type __l2 = __len / 2; 4130 _ForwardIterator __m = __first; 4131 _VSTD::advance(__m, __l2); 4132 if (__comp(*__m, __value_)) 4133 { 4134 __first = ++__m; 4135 __len -= __l2 + 1; 4136 } 4137 else 4138 __len = __l2; 4139 } 4140 return __first; 4141} 4142 4143template <class _ForwardIterator, class _Tp, class _Compare> 4144inline _LIBCPP_INLINE_VISIBILITY 4145_ForwardIterator 4146lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4147{ 4148#ifdef _LIBCPP_DEBUG 4149 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4150 __debug_less<_Compare> __c(__comp); 4151 return __lower_bound<_Comp_ref>(__first, __last, __value_, __c); 4152#else // _LIBCPP_DEBUG 4153 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4154 return __lower_bound<_Comp_ref>(__first, __last, __value_, __comp); 4155#endif // _LIBCPP_DEBUG 4156} 4157 4158template <class _ForwardIterator, class _Tp> 4159inline _LIBCPP_INLINE_VISIBILITY 4160_ForwardIterator 4161lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 4162{ 4163 return _VSTD::lower_bound(__first, __last, __value_, 4164 __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>()); 4165} 4166 4167// upper_bound 4168 4169template <class _Compare, class _ForwardIterator, class _Tp> 4170_ForwardIterator 4171__upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4172{ 4173 typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 4174 difference_type __len = _VSTD::distance(__first, __last); 4175 while (__len != 0) 4176 { 4177 difference_type __l2 = __len / 2; 4178 _ForwardIterator __m = __first; 4179 _VSTD::advance(__m, __l2); 4180 if (__comp(__value_, *__m)) 4181 __len = __l2; 4182 else 4183 { 4184 __first = ++__m; 4185 __len -= __l2 + 1; 4186 } 4187 } 4188 return __first; 4189} 4190 4191template <class _ForwardIterator, class _Tp, class _Compare> 4192inline _LIBCPP_INLINE_VISIBILITY 4193_ForwardIterator 4194upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4195{ 4196#ifdef _LIBCPP_DEBUG 4197 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4198 __debug_less<_Compare> __c(__comp); 4199 return __upper_bound<_Comp_ref>(__first, __last, __value_, __c); 4200#else // _LIBCPP_DEBUG 4201 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4202 return __upper_bound<_Comp_ref>(__first, __last, __value_, __comp); 4203#endif // _LIBCPP_DEBUG 4204} 4205 4206template <class _ForwardIterator, class _Tp> 4207inline _LIBCPP_INLINE_VISIBILITY 4208_ForwardIterator 4209upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 4210{ 4211 return _VSTD::upper_bound(__first, __last, __value_, 4212 __less<_Tp, typename iterator_traits<_ForwardIterator>::value_type>()); 4213} 4214 4215// equal_range 4216 4217template <class _Compare, class _ForwardIterator, class _Tp> 4218pair<_ForwardIterator, _ForwardIterator> 4219__equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4220{ 4221 typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 4222 difference_type __len = _VSTD::distance(__first, __last); 4223 while (__len != 0) 4224 { 4225 difference_type __l2 = __len / 2; 4226 _ForwardIterator __m = __first; 4227 _VSTD::advance(__m, __l2); 4228 if (__comp(*__m, __value_)) 4229 { 4230 __first = ++__m; 4231 __len -= __l2 + 1; 4232 } 4233 else if (__comp(__value_, *__m)) 4234 { 4235 __last = __m; 4236 __len = __l2; 4237 } 4238 else 4239 { 4240 _ForwardIterator __mp1 = __m; 4241 return pair<_ForwardIterator, _ForwardIterator> 4242 ( 4243 __lower_bound<_Compare>(__first, __m, __value_, __comp), 4244 __upper_bound<_Compare>(++__mp1, __last, __value_, __comp) 4245 ); 4246 } 4247 } 4248 return pair<_ForwardIterator, _ForwardIterator>(__first, __first); 4249} 4250 4251template <class _ForwardIterator, class _Tp, class _Compare> 4252inline _LIBCPP_INLINE_VISIBILITY 4253pair<_ForwardIterator, _ForwardIterator> 4254equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4255{ 4256#ifdef _LIBCPP_DEBUG 4257 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4258 __debug_less<_Compare> __c(__comp); 4259 return __equal_range<_Comp_ref>(__first, __last, __value_, __c); 4260#else // _LIBCPP_DEBUG 4261 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4262 return __equal_range<_Comp_ref>(__first, __last, __value_, __comp); 4263#endif // _LIBCPP_DEBUG 4264} 4265 4266template <class _ForwardIterator, class _Tp> 4267inline _LIBCPP_INLINE_VISIBILITY 4268pair<_ForwardIterator, _ForwardIterator> 4269equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 4270{ 4271 return _VSTD::equal_range(__first, __last, __value_, 4272 __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>()); 4273} 4274 4275// binary_search 4276 4277template <class _Compare, class _ForwardIterator, class _Tp> 4278inline _LIBCPP_INLINE_VISIBILITY 4279bool 4280__binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4281{ 4282 __first = __lower_bound<_Compare>(__first, __last, __value_, __comp); 4283 return __first != __last && !__comp(__value_, *__first); 4284} 4285 4286template <class _ForwardIterator, class _Tp, class _Compare> 4287inline _LIBCPP_INLINE_VISIBILITY 4288bool 4289binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 4290{ 4291#ifdef _LIBCPP_DEBUG 4292 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4293 __debug_less<_Compare> __c(__comp); 4294 return __binary_search<_Comp_ref>(__first, __last, __value_, __c); 4295#else // _LIBCPP_DEBUG 4296 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4297 return __binary_search<_Comp_ref>(__first, __last, __value_, __comp); 4298#endif // _LIBCPP_DEBUG 4299} 4300 4301template <class _ForwardIterator, class _Tp> 4302inline _LIBCPP_INLINE_VISIBILITY 4303bool 4304binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 4305{ 4306 return _VSTD::binary_search(__first, __last, __value_, 4307 __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>()); 4308} 4309 4310// merge 4311 4312template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 4313_OutputIterator 4314__merge(_InputIterator1 __first1, _InputIterator1 __last1, 4315 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 4316{ 4317 for (; __first1 != __last1; ++__result) 4318 { 4319 if (__first2 == __last2) 4320 return _VSTD::copy(__first1, __last1, __result); 4321 if (__comp(*__first2, *__first1)) 4322 { 4323 *__result = *__first2; 4324 ++__first2; 4325 } 4326 else 4327 { 4328 *__result = *__first1; 4329 ++__first1; 4330 } 4331 } 4332 return _VSTD::copy(__first2, __last2, __result); 4333} 4334 4335template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 4336inline _LIBCPP_INLINE_VISIBILITY 4337_OutputIterator 4338merge(_InputIterator1 __first1, _InputIterator1 __last1, 4339 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 4340{ 4341#ifdef _LIBCPP_DEBUG 4342 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4343 __debug_less<_Compare> __c(__comp); 4344 return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 4345#else // _LIBCPP_DEBUG 4346 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4347 return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 4348#endif // _LIBCPP_DEBUG 4349} 4350 4351template <class _InputIterator1, class _InputIterator2, class _OutputIterator> 4352inline _LIBCPP_INLINE_VISIBILITY 4353_OutputIterator 4354merge(_InputIterator1 __first1, _InputIterator1 __last1, 4355 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 4356{ 4357 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 4358 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 4359 return merge(__first1, __last1, __first2, __last2, __result, __less<__v1, __v2>()); 4360} 4361 4362// inplace_merge 4363 4364template <class _Compare, class _BidirectionalIterator> 4365void 4366__buffered_inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 4367 _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, 4368 typename iterator_traits<_BidirectionalIterator>::difference_type __len2, 4369 typename iterator_traits<_BidirectionalIterator>::value_type* __buff) 4370{ 4371 typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 4372 __destruct_n __d(0); 4373 unique_ptr<value_type, __destruct_n&> __h2(__buff, __d); 4374 if (__len1 <= __len2) 4375 { 4376 value_type* __p = __buff; 4377 for (_BidirectionalIterator __i = __first; __i != __middle; __d.__incr((value_type*)0), (void) ++__i, ++__p) 4378 ::new(__p) value_type(_VSTD::move(*__i)); 4379 __merge<_Compare>(move_iterator<value_type*>(__buff), 4380 move_iterator<value_type*>(__p), 4381 move_iterator<_BidirectionalIterator>(__middle), 4382 move_iterator<_BidirectionalIterator>(__last), 4383 __first, __comp); 4384 } 4385 else 4386 { 4387 value_type* __p = __buff; 4388 for (_BidirectionalIterator __i = __middle; __i != __last; __d.__incr((value_type*)0), (void) ++__i, ++__p) 4389 ::new(__p) value_type(_VSTD::move(*__i)); 4390 typedef reverse_iterator<_BidirectionalIterator> _RBi; 4391 typedef reverse_iterator<value_type*> _Rv; 4392 __merge(move_iterator<_RBi>(_RBi(__middle)), move_iterator<_RBi>(_RBi(__first)), 4393 move_iterator<_Rv>(_Rv(__p)), move_iterator<_Rv>(_Rv(__buff)), 4394 _RBi(__last), __negate<_Compare>(__comp)); 4395 } 4396} 4397 4398template <class _Compare, class _BidirectionalIterator> 4399void 4400__inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 4401 _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, 4402 typename iterator_traits<_BidirectionalIterator>::difference_type __len2, 4403 typename iterator_traits<_BidirectionalIterator>::value_type* __buff, ptrdiff_t __buff_size) 4404{ 4405 typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; 4406 while (true) 4407 { 4408 // if __middle == __last, we're done 4409 if (__len2 == 0) 4410 return; 4411 if (__len1 <= __buff_size || __len2 <= __buff_size) 4412 return __buffered_inplace_merge<_Compare> 4413 (__first, __middle, __last, __comp, __len1, __len2, __buff); 4414 // shrink [__first, __middle) as much as possible (with no moves), returning if it shrinks to 0 4415 for (; true; ++__first, (void) --__len1) 4416 { 4417 if (__len1 == 0) 4418 return; 4419 if (__comp(*__middle, *__first)) 4420 break; 4421 } 4422 // __first < __middle < __last 4423 // *__first > *__middle 4424 // partition [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) such that 4425 // all elements in: 4426 // [__first, __m1) <= [__middle, __m2) 4427 // [__middle, __m2) < [__m1, __middle) 4428 // [__m1, __middle) <= [__m2, __last) 4429 // and __m1 or __m2 is in the middle of its range 4430 _BidirectionalIterator __m1; // "median" of [__first, __middle) 4431 _BidirectionalIterator __m2; // "median" of [__middle, __last) 4432 difference_type __len11; // distance(__first, __m1) 4433 difference_type __len21; // distance(__middle, __m2) 4434 // binary search smaller range 4435 if (__len1 < __len2) 4436 { // __len >= 1, __len2 >= 2 4437 __len21 = __len2 / 2; 4438 __m2 = __middle; 4439 _VSTD::advance(__m2, __len21); 4440 __m1 = __upper_bound<_Compare>(__first, __middle, *__m2, __comp); 4441 __len11 = _VSTD::distance(__first, __m1); 4442 } 4443 else 4444 { 4445 if (__len1 == 1) 4446 { // __len1 >= __len2 && __len2 > 0, therefore __len2 == 1 4447 // It is known *__first > *__middle 4448 swap(*__first, *__middle); 4449 return; 4450 } 4451 // __len1 >= 2, __len2 >= 1 4452 __len11 = __len1 / 2; 4453 __m1 = __first; 4454 _VSTD::advance(__m1, __len11); 4455 __m2 = __lower_bound<_Compare>(__middle, __last, *__m1, __comp); 4456 __len21 = _VSTD::distance(__middle, __m2); 4457 } 4458 difference_type __len12 = __len1 - __len11; // distance(__m1, __middle) 4459 difference_type __len22 = __len2 - __len21; // distance(__m2, __last) 4460 // [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) 4461 // swap middle two partitions 4462 __middle = _VSTD::rotate(__m1, __middle, __m2); 4463 // __len12 and __len21 now have swapped meanings 4464 // merge smaller range with recurisve call and larger with tail recursion elimination 4465 if (__len11 + __len21 < __len12 + __len22) 4466 { 4467 __inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); 4468// __inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); 4469 __first = __middle; 4470 __middle = __m2; 4471 __len1 = __len12; 4472 __len2 = __len22; 4473 } 4474 else 4475 { 4476 __inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); 4477// __inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); 4478 __last = __middle; 4479 __middle = __m1; 4480 __len1 = __len11; 4481 __len2 = __len21; 4482 } 4483 } 4484} 4485 4486template <class _BidirectionalIterator, class _Compare> 4487inline _LIBCPP_INLINE_VISIBILITY 4488void 4489inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 4490 _Compare __comp) 4491{ 4492 typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 4493 typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; 4494 difference_type __len1 = _VSTD::distance(__first, __middle); 4495 difference_type __len2 = _VSTD::distance(__middle, __last); 4496 difference_type __buf_size = _VSTD::min(__len1, __len2); 4497 pair<value_type*, ptrdiff_t> __buf = _VSTD::get_temporary_buffer<value_type>(__buf_size); 4498 unique_ptr<value_type, __return_temporary_buffer> __h(__buf.first); 4499 4500#ifdef _LIBCPP_DEBUG 4501 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4502 __debug_less<_Compare> __c(__comp); 4503 return _VSTD::__inplace_merge<_Comp_ref>(__first, __middle, __last, __c, __len1, __len2, 4504 __buf.first, __buf.second); 4505#else // _LIBCPP_DEBUG 4506 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4507 return _VSTD::__inplace_merge<_Comp_ref>(__first, __middle, __last, __comp, __len1, __len2, 4508 __buf.first, __buf.second); 4509#endif // _LIBCPP_DEBUG 4510} 4511 4512template <class _BidirectionalIterator> 4513inline _LIBCPP_INLINE_VISIBILITY 4514void 4515inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last) 4516{ 4517 _VSTD::inplace_merge(__first, __middle, __last, 4518 __less<typename iterator_traits<_BidirectionalIterator>::value_type>()); 4519} 4520 4521// stable_sort 4522 4523template <class _Compare, class _InputIterator1, class _InputIterator2> 4524void 4525__merge_move_construct(_InputIterator1 __first1, _InputIterator1 __last1, 4526 _InputIterator2 __first2, _InputIterator2 __last2, 4527 typename iterator_traits<_InputIterator1>::value_type* __result, _Compare __comp) 4528{ 4529 typedef typename iterator_traits<_InputIterator1>::value_type value_type; 4530 __destruct_n __d(0); 4531 unique_ptr<value_type, __destruct_n&> __h(__result, __d); 4532 for (; true; ++__result) 4533 { 4534 if (__first1 == __last1) 4535 { 4536 for (; __first2 != __last2; ++__first2, ++__result, __d.__incr((value_type*)0)) 4537 ::new (__result) value_type(_VSTD::move(*__first2)); 4538 __h.release(); 4539 return; 4540 } 4541 if (__first2 == __last2) 4542 { 4543 for (; __first1 != __last1; ++__first1, ++__result, __d.__incr((value_type*)0)) 4544 ::new (__result) value_type(_VSTD::move(*__first1)); 4545 __h.release(); 4546 return; 4547 } 4548 if (__comp(*__first2, *__first1)) 4549 { 4550 ::new (__result) value_type(_VSTD::move(*__first2)); 4551 __d.__incr((value_type*)0); 4552 ++__first2; 4553 } 4554 else 4555 { 4556 ::new (__result) value_type(_VSTD::move(*__first1)); 4557 __d.__incr((value_type*)0); 4558 ++__first1; 4559 } 4560 } 4561} 4562 4563template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 4564void 4565__merge_move_assign(_InputIterator1 __first1, _InputIterator1 __last1, 4566 _InputIterator2 __first2, _InputIterator2 __last2, 4567 _OutputIterator __result, _Compare __comp) 4568{ 4569 for (; __first1 != __last1; ++__result) 4570 { 4571 if (__first2 == __last2) 4572 { 4573 for (; __first1 != __last1; ++__first1, ++__result) 4574 *__result = _VSTD::move(*__first1); 4575 return; 4576 } 4577 if (__comp(*__first2, *__first1)) 4578 { 4579 *__result = _VSTD::move(*__first2); 4580 ++__first2; 4581 } 4582 else 4583 { 4584 *__result = _VSTD::move(*__first1); 4585 ++__first1; 4586 } 4587 } 4588 for (; __first2 != __last2; ++__first2, ++__result) 4589 *__result = _VSTD::move(*__first2); 4590} 4591 4592template <class _Compare, class _RandomAccessIterator> 4593void 4594__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 4595 typename iterator_traits<_RandomAccessIterator>::difference_type __len, 4596 typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size); 4597 4598template <class _Compare, class _RandomAccessIterator> 4599void 4600__stable_sort_move(_RandomAccessIterator __first1, _RandomAccessIterator __last1, _Compare __comp, 4601 typename iterator_traits<_RandomAccessIterator>::difference_type __len, 4602 typename iterator_traits<_RandomAccessIterator>::value_type* __first2) 4603{ 4604 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 4605 switch (__len) 4606 { 4607 case 0: 4608 return; 4609 case 1: 4610 ::new(__first2) value_type(_VSTD::move(*__first1)); 4611 return; 4612 case 2: 4613 __destruct_n __d(0); 4614 unique_ptr<value_type, __destruct_n&> __h2(__first2, __d); 4615 if (__comp(*--__last1, *__first1)) 4616 { 4617 ::new(__first2) value_type(_VSTD::move(*__last1)); 4618 __d.__incr((value_type*)0); 4619 ++__first2; 4620 ::new(__first2) value_type(_VSTD::move(*__first1)); 4621 } 4622 else 4623 { 4624 ::new(__first2) value_type(_VSTD::move(*__first1)); 4625 __d.__incr((value_type*)0); 4626 ++__first2; 4627 ::new(__first2) value_type(_VSTD::move(*__last1)); 4628 } 4629 __h2.release(); 4630 return; 4631 } 4632 if (__len <= 8) 4633 { 4634 __insertion_sort_move<_Compare>(__first1, __last1, __first2, __comp); 4635 return; 4636 } 4637 typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; 4638 _RandomAccessIterator __m = __first1 + __l2; 4639 __stable_sort<_Compare>(__first1, __m, __comp, __l2, __first2, __l2); 4640 __stable_sort<_Compare>(__m, __last1, __comp, __len - __l2, __first2 + __l2, __len - __l2); 4641 __merge_move_construct<_Compare>(__first1, __m, __m, __last1, __first2, __comp); 4642} 4643 4644template <class _Tp> 4645struct __stable_sort_switch 4646{ 4647 static const unsigned value = 128*is_trivially_copy_assignable<_Tp>::value; 4648}; 4649 4650template <class _Compare, class _RandomAccessIterator> 4651void 4652__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 4653 typename iterator_traits<_RandomAccessIterator>::difference_type __len, 4654 typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size) 4655{ 4656 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 4657 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 4658 switch (__len) 4659 { 4660 case 0: 4661 case 1: 4662 return; 4663 case 2: 4664 if (__comp(*--__last, *__first)) 4665 swap(*__first, *__last); 4666 return; 4667 } 4668 if (__len <= static_cast<difference_type>(__stable_sort_switch<value_type>::value)) 4669 { 4670 __insertion_sort<_Compare>(__first, __last, __comp); 4671 return; 4672 } 4673 typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; 4674 _RandomAccessIterator __m = __first + __l2; 4675 if (__len <= __buff_size) 4676 { 4677 __destruct_n __d(0); 4678 unique_ptr<value_type, __destruct_n&> __h2(__buff, __d); 4679 __stable_sort_move<_Compare>(__first, __m, __comp, __l2, __buff); 4680 __d.__set(__l2, (value_type*)0); 4681 __stable_sort_move<_Compare>(__m, __last, __comp, __len - __l2, __buff + __l2); 4682 __d.__set(__len, (value_type*)0); 4683 __merge_move_assign<_Compare>(__buff, __buff + __l2, __buff + __l2, __buff + __len, __first, __comp); 4684// __merge<_Compare>(move_iterator<value_type*>(__buff), 4685// move_iterator<value_type*>(__buff + __l2), 4686// move_iterator<_RandomAccessIterator>(__buff + __l2), 4687// move_iterator<_RandomAccessIterator>(__buff + __len), 4688// __first, __comp); 4689 return; 4690 } 4691 __stable_sort<_Compare>(__first, __m, __comp, __l2, __buff, __buff_size); 4692 __stable_sort<_Compare>(__m, __last, __comp, __len - __l2, __buff, __buff_size); 4693 __inplace_merge<_Compare>(__first, __m, __last, __comp, __l2, __len - __l2, __buff, __buff_size); 4694} 4695 4696template <class _RandomAccessIterator, class _Compare> 4697inline _LIBCPP_INLINE_VISIBILITY 4698void 4699stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4700{ 4701 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 4702 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 4703 difference_type __len = __last - __first; 4704 pair<value_type*, ptrdiff_t> __buf(0, 0); 4705 unique_ptr<value_type, __return_temporary_buffer> __h; 4706 if (__len > static_cast<difference_type>(__stable_sort_switch<value_type>::value)) 4707 { 4708 __buf = _VSTD::get_temporary_buffer<value_type>(__len); 4709 __h.reset(__buf.first); 4710 } 4711#ifdef _LIBCPP_DEBUG 4712 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4713 __debug_less<_Compare> __c(__comp); 4714 __stable_sort<_Comp_ref>(__first, __last, __c, __len, __buf.first, __buf.second); 4715#else // _LIBCPP_DEBUG 4716 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4717 __stable_sort<_Comp_ref>(__first, __last, __comp, __len, __buf.first, __buf.second); 4718#endif // _LIBCPP_DEBUG 4719} 4720 4721template <class _RandomAccessIterator> 4722inline _LIBCPP_INLINE_VISIBILITY 4723void 4724stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last) 4725{ 4726 _VSTD::stable_sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 4727} 4728 4729// is_heap_until 4730 4731template <class _RandomAccessIterator, class _Compare> 4732_RandomAccessIterator 4733is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4734{ 4735 typedef typename _VSTD::iterator_traits<_RandomAccessIterator>::difference_type difference_type; 4736 difference_type __len = __last - __first; 4737 difference_type __p = 0; 4738 difference_type __c = 1; 4739 _RandomAccessIterator __pp = __first; 4740 while (__c < __len) 4741 { 4742 _RandomAccessIterator __cp = __first + __c; 4743 if (__comp(*__pp, *__cp)) 4744 return __cp; 4745 ++__c; 4746 ++__cp; 4747 if (__c == __len) 4748 return __last; 4749 if (__comp(*__pp, *__cp)) 4750 return __cp; 4751 ++__p; 4752 ++__pp; 4753 __c = 2 * __p + 1; 4754 } 4755 return __last; 4756} 4757 4758template<class _RandomAccessIterator> 4759inline _LIBCPP_INLINE_VISIBILITY 4760_RandomAccessIterator 4761is_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last) 4762{ 4763 return _VSTD::is_heap_until(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 4764} 4765 4766// is_heap 4767 4768template <class _RandomAccessIterator, class _Compare> 4769inline _LIBCPP_INLINE_VISIBILITY 4770bool 4771is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4772{ 4773 return _VSTD::is_heap_until(__first, __last, __comp) == __last; 4774} 4775 4776template<class _RandomAccessIterator> 4777inline _LIBCPP_INLINE_VISIBILITY 4778bool 4779is_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 4780{ 4781 return _VSTD::is_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 4782} 4783 4784// push_heap 4785 4786template <class _Compare, class _RandomAccessIterator> 4787void 4788__sift_up(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 4789 typename iterator_traits<_RandomAccessIterator>::difference_type __len) 4790{ 4791 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 4792 if (__len > 1) 4793 { 4794 __len = (__len - 2) / 2; 4795 _RandomAccessIterator __ptr = __first + __len; 4796 if (__comp(*__ptr, *--__last)) 4797 { 4798 value_type __t(_VSTD::move(*__last)); 4799 do 4800 { 4801 *__last = _VSTD::move(*__ptr); 4802 __last = __ptr; 4803 if (__len == 0) 4804 break; 4805 __len = (__len - 1) / 2; 4806 __ptr = __first + __len; 4807 } while (__comp(*__ptr, __t)); 4808 *__last = _VSTD::move(__t); 4809 } 4810 } 4811} 4812 4813template <class _RandomAccessIterator, class _Compare> 4814inline _LIBCPP_INLINE_VISIBILITY 4815void 4816push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4817{ 4818#ifdef _LIBCPP_DEBUG 4819 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4820 __debug_less<_Compare> __c(__comp); 4821 __sift_up<_Comp_ref>(__first, __last, __c, __last - __first); 4822#else // _LIBCPP_DEBUG 4823 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4824 __sift_up<_Comp_ref>(__first, __last, __comp, __last - __first); 4825#endif // _LIBCPP_DEBUG 4826} 4827 4828template <class _RandomAccessIterator> 4829inline _LIBCPP_INLINE_VISIBILITY 4830void 4831push_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 4832{ 4833 _VSTD::push_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 4834} 4835 4836// pop_heap 4837 4838template <class _Compare, class _RandomAccessIterator> 4839void 4840__sift_down(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 4841 typename iterator_traits<_RandomAccessIterator>::difference_type __len, 4842 _RandomAccessIterator __start) 4843{ 4844 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 4845 typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 4846 // left-child of __start is at 2 * __start + 1 4847 // right-child of __start is at 2 * __start + 2 4848 difference_type __child = __start - __first; 4849 4850 if (__len < 2 || (__len - 2) / 2 < __child) 4851 return; 4852 4853 __child = 2 * __child + 1; 4854 _RandomAccessIterator __child_i = __first + __child; 4855 4856 if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { 4857 // right-child exists and is greater than left-child 4858 ++__child_i; 4859 ++__child; 4860 } 4861 4862 // check if we are in heap-order 4863 if (__comp(*__child_i, *__start)) 4864 // we are, __start is larger than it's largest child 4865 return; 4866 4867 value_type __top(_VSTD::move(*__start)); 4868 do 4869 { 4870 // we are not in heap-order, swap the parent with it's largest child 4871 *__start = _VSTD::move(*__child_i); 4872 __start = __child_i; 4873 4874 if ((__len - 2) / 2 < __child) 4875 break; 4876 4877 // recompute the child based off of the updated parent 4878 __child = 2 * __child + 1; 4879 __child_i = __first + __child; 4880 4881 if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { 4882 // right-child exists and is greater than left-child 4883 ++__child_i; 4884 ++__child; 4885 } 4886 4887 // check if we are in heap-order 4888 } while (!__comp(*__child_i, __top)); 4889 *__start = _VSTD::move(__top); 4890} 4891 4892template <class _Compare, class _RandomAccessIterator> 4893inline _LIBCPP_INLINE_VISIBILITY 4894void 4895__pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 4896 typename iterator_traits<_RandomAccessIterator>::difference_type __len) 4897{ 4898 if (__len > 1) 4899 { 4900 swap(*__first, *--__last); 4901 __sift_down<_Compare>(__first, __last, __comp, __len - 1, __first); 4902 } 4903} 4904 4905template <class _RandomAccessIterator, class _Compare> 4906inline _LIBCPP_INLINE_VISIBILITY 4907void 4908pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4909{ 4910#ifdef _LIBCPP_DEBUG 4911 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4912 __debug_less<_Compare> __c(__comp); 4913 __pop_heap<_Comp_ref>(__first, __last, __c, __last - __first); 4914#else // _LIBCPP_DEBUG 4915 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4916 __pop_heap<_Comp_ref>(__first, __last, __comp, __last - __first); 4917#endif // _LIBCPP_DEBUG 4918} 4919 4920template <class _RandomAccessIterator> 4921inline _LIBCPP_INLINE_VISIBILITY 4922void 4923pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 4924{ 4925 _VSTD::pop_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 4926} 4927 4928// make_heap 4929 4930template <class _Compare, class _RandomAccessIterator> 4931void 4932__make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4933{ 4934 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 4935 difference_type __n = __last - __first; 4936 if (__n > 1) 4937 { 4938 // start from the first parent, there is no need to consider children 4939 for (difference_type __start = (__n - 2) / 2; __start >= 0; --__start) 4940 { 4941 __sift_down<_Compare>(__first, __last, __comp, __n, __first + __start); 4942 } 4943 } 4944} 4945 4946template <class _RandomAccessIterator, class _Compare> 4947inline _LIBCPP_INLINE_VISIBILITY 4948void 4949make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4950{ 4951#ifdef _LIBCPP_DEBUG 4952 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4953 __debug_less<_Compare> __c(__comp); 4954 __make_heap<_Comp_ref>(__first, __last, __c); 4955#else // _LIBCPP_DEBUG 4956 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4957 __make_heap<_Comp_ref>(__first, __last, __comp); 4958#endif // _LIBCPP_DEBUG 4959} 4960 4961template <class _RandomAccessIterator> 4962inline _LIBCPP_INLINE_VISIBILITY 4963void 4964make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 4965{ 4966 _VSTD::make_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 4967} 4968 4969// sort_heap 4970 4971template <class _Compare, class _RandomAccessIterator> 4972void 4973__sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4974{ 4975 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 4976 for (difference_type __n = __last - __first; __n > 1; --__last, --__n) 4977 __pop_heap<_Compare>(__first, __last, __comp, __n); 4978} 4979 4980template <class _RandomAccessIterator, class _Compare> 4981inline _LIBCPP_INLINE_VISIBILITY 4982void 4983sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 4984{ 4985#ifdef _LIBCPP_DEBUG 4986 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 4987 __debug_less<_Compare> __c(__comp); 4988 __sort_heap<_Comp_ref>(__first, __last, __c); 4989#else // _LIBCPP_DEBUG 4990 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4991 __sort_heap<_Comp_ref>(__first, __last, __comp); 4992#endif // _LIBCPP_DEBUG 4993} 4994 4995template <class _RandomAccessIterator> 4996inline _LIBCPP_INLINE_VISIBILITY 4997void 4998sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 4999{ 5000 _VSTD::sort_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 5001} 5002 5003// partial_sort 5004 5005template <class _Compare, class _RandomAccessIterator> 5006void 5007__partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, 5008 _Compare __comp) 5009{ 5010 __make_heap<_Compare>(__first, __middle, __comp); 5011 typename iterator_traits<_RandomAccessIterator>::difference_type __len = __middle - __first; 5012 for (_RandomAccessIterator __i = __middle; __i != __last; ++__i) 5013 { 5014 if (__comp(*__i, *__first)) 5015 { 5016 swap(*__i, *__first); 5017 __sift_down<_Compare>(__first, __middle, __comp, __len, __first); 5018 } 5019 } 5020 __sort_heap<_Compare>(__first, __middle, __comp); 5021} 5022 5023template <class _RandomAccessIterator, class _Compare> 5024inline _LIBCPP_INLINE_VISIBILITY 5025void 5026partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, 5027 _Compare __comp) 5028{ 5029#ifdef _LIBCPP_DEBUG 5030 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5031 __debug_less<_Compare> __c(__comp); 5032 __partial_sort<_Comp_ref>(__first, __middle, __last, __c); 5033#else // _LIBCPP_DEBUG 5034 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5035 __partial_sort<_Comp_ref>(__first, __middle, __last, __comp); 5036#endif // _LIBCPP_DEBUG 5037} 5038 5039template <class _RandomAccessIterator> 5040inline _LIBCPP_INLINE_VISIBILITY 5041void 5042partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) 5043{ 5044 _VSTD::partial_sort(__first, __middle, __last, 5045 __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 5046} 5047 5048// partial_sort_copy 5049 5050template <class _Compare, class _InputIterator, class _RandomAccessIterator> 5051_RandomAccessIterator 5052__partial_sort_copy(_InputIterator __first, _InputIterator __last, 5053 _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) 5054{ 5055 _RandomAccessIterator __r = __result_first; 5056 if (__r != __result_last) 5057 { 5058 for (; __first != __last && __r != __result_last; (void) ++__first, ++__r) 5059 *__r = *__first; 5060 __make_heap<_Compare>(__result_first, __r, __comp); 5061 typename iterator_traits<_RandomAccessIterator>::difference_type __len = __r - __result_first; 5062 for (; __first != __last; ++__first) 5063 if (__comp(*__first, *__result_first)) 5064 { 5065 *__result_first = *__first; 5066 __sift_down<_Compare>(__result_first, __r, __comp, __len, __result_first); 5067 } 5068 __sort_heap<_Compare>(__result_first, __r, __comp); 5069 } 5070 return __r; 5071} 5072 5073template <class _InputIterator, class _RandomAccessIterator, class _Compare> 5074inline _LIBCPP_INLINE_VISIBILITY 5075_RandomAccessIterator 5076partial_sort_copy(_InputIterator __first, _InputIterator __last, 5077 _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) 5078{ 5079#ifdef _LIBCPP_DEBUG 5080 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5081 __debug_less<_Compare> __c(__comp); 5082 return __partial_sort_copy<_Comp_ref>(__first, __last, __result_first, __result_last, __c); 5083#else // _LIBCPP_DEBUG 5084 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5085 return __partial_sort_copy<_Comp_ref>(__first, __last, __result_first, __result_last, __comp); 5086#endif // _LIBCPP_DEBUG 5087} 5088 5089template <class _InputIterator, class _RandomAccessIterator> 5090inline _LIBCPP_INLINE_VISIBILITY 5091_RandomAccessIterator 5092partial_sort_copy(_InputIterator __first, _InputIterator __last, 5093 _RandomAccessIterator __result_first, _RandomAccessIterator __result_last) 5094{ 5095 return _VSTD::partial_sort_copy(__first, __last, __result_first, __result_last, 5096 __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 5097} 5098 5099// nth_element 5100 5101template <class _Compare, class _RandomAccessIterator> 5102void 5103__nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) 5104{ 5105 // _Compare is known to be a reference type 5106 typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 5107 const difference_type __limit = 7; 5108 while (true) 5109 { 5110 __restart: 5111 if (__nth == __last) 5112 return; 5113 difference_type __len = __last - __first; 5114 switch (__len) 5115 { 5116 case 0: 5117 case 1: 5118 return; 5119 case 2: 5120 if (__comp(*--__last, *__first)) 5121 swap(*__first, *__last); 5122 return; 5123 case 3: 5124 { 5125 _RandomAccessIterator __m = __first; 5126 _VSTD::__sort3<_Compare>(__first, ++__m, --__last, __comp); 5127 return; 5128 } 5129 } 5130 if (__len <= __limit) 5131 { 5132 __selection_sort<_Compare>(__first, __last, __comp); 5133 return; 5134 } 5135 // __len > __limit >= 3 5136 _RandomAccessIterator __m = __first + __len/2; 5137 _RandomAccessIterator __lm1 = __last; 5138 unsigned __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, --__lm1, __comp); 5139 // *__m is median 5140 // partition [__first, __m) < *__m and *__m <= [__m, __last) 5141 // (this inhibits tossing elements equivalent to __m around unnecessarily) 5142 _RandomAccessIterator __i = __first; 5143 _RandomAccessIterator __j = __lm1; 5144 // j points beyond range to be tested, *__lm1 is known to be <= *__m 5145 // The search going up is known to be guarded but the search coming down isn't. 5146 // Prime the downward search with a guard. 5147 if (!__comp(*__i, *__m)) // if *__first == *__m 5148 { 5149 // *__first == *__m, *__first doesn't go in first part 5150 // manually guard downward moving __j against __i 5151 while (true) 5152 { 5153 if (__i == --__j) 5154 { 5155 // *__first == *__m, *__m <= all other elements 5156 // Parition instead into [__first, __i) == *__first and *__first < [__i, __last) 5157 ++__i; // __first + 1 5158 __j = __last; 5159 if (!__comp(*__first, *--__j)) // we need a guard if *__first == *(__last-1) 5160 { 5161 while (true) 5162 { 5163 if (__i == __j) 5164 return; // [__first, __last) all equivalent elements 5165 if (__comp(*__first, *__i)) 5166 { 5167 swap(*__i, *__j); 5168 ++__n_swaps; 5169 ++__i; 5170 break; 5171 } 5172 ++__i; 5173 } 5174 } 5175 // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 5176 if (__i == __j) 5177 return; 5178 while (true) 5179 { 5180 while (!__comp(*__first, *__i)) 5181 ++__i; 5182 while (__comp(*__first, *--__j)) 5183 ; 5184 if (__i >= __j) 5185 break; 5186 swap(*__i, *__j); 5187 ++__n_swaps; 5188 ++__i; 5189 } 5190 // [__first, __i) == *__first and *__first < [__i, __last) 5191 // The first part is sorted, 5192 if (__nth < __i) 5193 return; 5194 // __nth_element the secod part 5195 // __nth_element<_Compare>(__i, __nth, __last, __comp); 5196 __first = __i; 5197 goto __restart; 5198 } 5199 if (__comp(*__j, *__m)) 5200 { 5201 swap(*__i, *__j); 5202 ++__n_swaps; 5203 break; // found guard for downward moving __j, now use unguarded partition 5204 } 5205 } 5206 } 5207 ++__i; 5208 // j points beyond range to be tested, *__lm1 is known to be <= *__m 5209 // if not yet partitioned... 5210 if (__i < __j) 5211 { 5212 // known that *(__i - 1) < *__m 5213 while (true) 5214 { 5215 // __m still guards upward moving __i 5216 while (__comp(*__i, *__m)) 5217 ++__i; 5218 // It is now known that a guard exists for downward moving __j 5219 while (!__comp(*--__j, *__m)) 5220 ; 5221 if (__i >= __j) 5222 break; 5223 swap(*__i, *__j); 5224 ++__n_swaps; 5225 // It is known that __m != __j 5226 // If __m just moved, follow it 5227 if (__m == __i) 5228 __m = __j; 5229 ++__i; 5230 } 5231 } 5232 // [__first, __i) < *__m and *__m <= [__i, __last) 5233 if (__i != __m && __comp(*__m, *__i)) 5234 { 5235 swap(*__i, *__m); 5236 ++__n_swaps; 5237 } 5238 // [__first, __i) < *__i and *__i <= [__i+1, __last) 5239 if (__nth == __i) 5240 return; 5241 if (__n_swaps == 0) 5242 { 5243 // We were given a perfectly partitioned sequence. Coincidence? 5244 if (__nth < __i) 5245 { 5246 // Check for [__first, __i) already sorted 5247 __j = __m = __first; 5248 while (++__j != __i) 5249 { 5250 if (__comp(*__j, *__m)) 5251 // not yet sorted, so sort 5252 goto not_sorted; 5253 __m = __j; 5254 } 5255 // [__first, __i) sorted 5256 return; 5257 } 5258 else 5259 { 5260 // Check for [__i, __last) already sorted 5261 __j = __m = __i; 5262 while (++__j != __last) 5263 { 5264 if (__comp(*__j, *__m)) 5265 // not yet sorted, so sort 5266 goto not_sorted; 5267 __m = __j; 5268 } 5269 // [__i, __last) sorted 5270 return; 5271 } 5272 } 5273not_sorted: 5274 // __nth_element on range containing __nth 5275 if (__nth < __i) 5276 { 5277 // __nth_element<_Compare>(__first, __nth, __i, __comp); 5278 __last = __i; 5279 } 5280 else 5281 { 5282 // __nth_element<_Compare>(__i+1, __nth, __last, __comp); 5283 __first = ++__i; 5284 } 5285 } 5286} 5287 5288template <class _RandomAccessIterator, class _Compare> 5289inline _LIBCPP_INLINE_VISIBILITY 5290void 5291nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) 5292{ 5293#ifdef _LIBCPP_DEBUG 5294 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5295 __debug_less<_Compare> __c(__comp); 5296 __nth_element<_Comp_ref>(__first, __nth, __last, __c); 5297#else // _LIBCPP_DEBUG 5298 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5299 __nth_element<_Comp_ref>(__first, __nth, __last, __comp); 5300#endif // _LIBCPP_DEBUG 5301} 5302 5303template <class _RandomAccessIterator> 5304inline _LIBCPP_INLINE_VISIBILITY 5305void 5306nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last) 5307{ 5308 _VSTD::nth_element(__first, __nth, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 5309} 5310 5311// includes 5312 5313template <class _Compare, class _InputIterator1, class _InputIterator2> 5314bool 5315__includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 5316 _Compare __comp) 5317{ 5318 for (; __first2 != __last2; ++__first1) 5319 { 5320 if (__first1 == __last1 || __comp(*__first2, *__first1)) 5321 return false; 5322 if (!__comp(*__first1, *__first2)) 5323 ++__first2; 5324 } 5325 return true; 5326} 5327 5328template <class _InputIterator1, class _InputIterator2, class _Compare> 5329inline _LIBCPP_INLINE_VISIBILITY 5330bool 5331includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 5332 _Compare __comp) 5333{ 5334#ifdef _LIBCPP_DEBUG 5335 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5336 __debug_less<_Compare> __c(__comp); 5337 return __includes<_Comp_ref>(__first1, __last1, __first2, __last2, __c); 5338#else // _LIBCPP_DEBUG 5339 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5340 return __includes<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); 5341#endif // _LIBCPP_DEBUG 5342} 5343 5344template <class _InputIterator1, class _InputIterator2> 5345inline _LIBCPP_INLINE_VISIBILITY 5346bool 5347includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) 5348{ 5349 return _VSTD::includes(__first1, __last1, __first2, __last2, 5350 __less<typename iterator_traits<_InputIterator1>::value_type, 5351 typename iterator_traits<_InputIterator2>::value_type>()); 5352} 5353 5354// set_union 5355 5356template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 5357_OutputIterator 5358__set_union(_InputIterator1 __first1, _InputIterator1 __last1, 5359 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5360{ 5361 for (; __first1 != __last1; ++__result) 5362 { 5363 if (__first2 == __last2) 5364 return _VSTD::copy(__first1, __last1, __result); 5365 if (__comp(*__first2, *__first1)) 5366 { 5367 *__result = *__first2; 5368 ++__first2; 5369 } 5370 else 5371 { 5372 *__result = *__first1; 5373 if (!__comp(*__first1, *__first2)) 5374 ++__first2; 5375 ++__first1; 5376 } 5377 } 5378 return _VSTD::copy(__first2, __last2, __result); 5379} 5380 5381template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 5382inline _LIBCPP_INLINE_VISIBILITY 5383_OutputIterator 5384set_union(_InputIterator1 __first1, _InputIterator1 __last1, 5385 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5386{ 5387#ifdef _LIBCPP_DEBUG 5388 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5389 __debug_less<_Compare> __c(__comp); 5390 return __set_union<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5391#else // _LIBCPP_DEBUG 5392 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5393 return __set_union<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5394#endif // _LIBCPP_DEBUG 5395} 5396 5397template <class _InputIterator1, class _InputIterator2, class _OutputIterator> 5398inline _LIBCPP_INLINE_VISIBILITY 5399_OutputIterator 5400set_union(_InputIterator1 __first1, _InputIterator1 __last1, 5401 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 5402{ 5403 return _VSTD::set_union(__first1, __last1, __first2, __last2, __result, 5404 __less<typename iterator_traits<_InputIterator1>::value_type, 5405 typename iterator_traits<_InputIterator2>::value_type>()); 5406} 5407 5408// set_intersection 5409 5410template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 5411_OutputIterator 5412__set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 5413 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5414{ 5415 while (__first1 != __last1 && __first2 != __last2) 5416 { 5417 if (__comp(*__first1, *__first2)) 5418 ++__first1; 5419 else 5420 { 5421 if (!__comp(*__first2, *__first1)) 5422 { 5423 *__result = *__first1; 5424 ++__result; 5425 ++__first1; 5426 } 5427 ++__first2; 5428 } 5429 } 5430 return __result; 5431} 5432 5433template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 5434inline _LIBCPP_INLINE_VISIBILITY 5435_OutputIterator 5436set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 5437 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5438{ 5439#ifdef _LIBCPP_DEBUG 5440 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5441 __debug_less<_Compare> __c(__comp); 5442 return __set_intersection<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5443#else // _LIBCPP_DEBUG 5444 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5445 return __set_intersection<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5446#endif // _LIBCPP_DEBUG 5447} 5448 5449template <class _InputIterator1, class _InputIterator2, class _OutputIterator> 5450inline _LIBCPP_INLINE_VISIBILITY 5451_OutputIterator 5452set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 5453 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 5454{ 5455 return _VSTD::set_intersection(__first1, __last1, __first2, __last2, __result, 5456 __less<typename iterator_traits<_InputIterator1>::value_type, 5457 typename iterator_traits<_InputIterator2>::value_type>()); 5458} 5459 5460// set_difference 5461 5462template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 5463_OutputIterator 5464__set_difference(_InputIterator1 __first1, _InputIterator1 __last1, 5465 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5466{ 5467 while (__first1 != __last1) 5468 { 5469 if (__first2 == __last2) 5470 return _VSTD::copy(__first1, __last1, __result); 5471 if (__comp(*__first1, *__first2)) 5472 { 5473 *__result = *__first1; 5474 ++__result; 5475 ++__first1; 5476 } 5477 else 5478 { 5479 if (!__comp(*__first2, *__first1)) 5480 ++__first1; 5481 ++__first2; 5482 } 5483 } 5484 return __result; 5485} 5486 5487template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 5488inline _LIBCPP_INLINE_VISIBILITY 5489_OutputIterator 5490set_difference(_InputIterator1 __first1, _InputIterator1 __last1, 5491 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5492{ 5493#ifdef _LIBCPP_DEBUG 5494 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5495 __debug_less<_Compare> __c(__comp); 5496 return __set_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5497#else // _LIBCPP_DEBUG 5498 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5499 return __set_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5500#endif // _LIBCPP_DEBUG 5501} 5502 5503template <class _InputIterator1, class _InputIterator2, class _OutputIterator> 5504inline _LIBCPP_INLINE_VISIBILITY 5505_OutputIterator 5506set_difference(_InputIterator1 __first1, _InputIterator1 __last1, 5507 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 5508{ 5509 return _VSTD::set_difference(__first1, __last1, __first2, __last2, __result, 5510 __less<typename iterator_traits<_InputIterator1>::value_type, 5511 typename iterator_traits<_InputIterator2>::value_type>()); 5512} 5513 5514// set_symmetric_difference 5515 5516template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 5517_OutputIterator 5518__set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 5519 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5520{ 5521 while (__first1 != __last1) 5522 { 5523 if (__first2 == __last2) 5524 return _VSTD::copy(__first1, __last1, __result); 5525 if (__comp(*__first1, *__first2)) 5526 { 5527 *__result = *__first1; 5528 ++__result; 5529 ++__first1; 5530 } 5531 else 5532 { 5533 if (__comp(*__first2, *__first1)) 5534 { 5535 *__result = *__first2; 5536 ++__result; 5537 } 5538 else 5539 ++__first1; 5540 ++__first2; 5541 } 5542 } 5543 return _VSTD::copy(__first2, __last2, __result); 5544} 5545 5546template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 5547inline _LIBCPP_INLINE_VISIBILITY 5548_OutputIterator 5549set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 5550 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 5551{ 5552#ifdef _LIBCPP_DEBUG 5553 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5554 __debug_less<_Compare> __c(__comp); 5555 return __set_symmetric_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5556#else // _LIBCPP_DEBUG 5557 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5558 return __set_symmetric_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5559#endif // _LIBCPP_DEBUG 5560} 5561 5562template <class _InputIterator1, class _InputIterator2, class _OutputIterator> 5563inline _LIBCPP_INLINE_VISIBILITY 5564_OutputIterator 5565set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 5566 _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 5567{ 5568 return _VSTD::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, 5569 __less<typename iterator_traits<_InputIterator1>::value_type, 5570 typename iterator_traits<_InputIterator2>::value_type>()); 5571} 5572 5573// lexicographical_compare 5574 5575template <class _Compare, class _InputIterator1, class _InputIterator2> 5576bool 5577__lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 5578 _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) 5579{ 5580 for (; __first2 != __last2; ++__first1, (void) ++__first2) 5581 { 5582 if (__first1 == __last1 || __comp(*__first1, *__first2)) 5583 return true; 5584 if (__comp(*__first2, *__first1)) 5585 return false; 5586 } 5587 return false; 5588} 5589 5590template <class _InputIterator1, class _InputIterator2, class _Compare> 5591inline _LIBCPP_INLINE_VISIBILITY 5592bool 5593lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 5594 _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) 5595{ 5596#ifdef _LIBCPP_DEBUG 5597 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5598 __debug_less<_Compare> __c(__comp); 5599 return __lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __c); 5600#else // _LIBCPP_DEBUG 5601 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5602 return __lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); 5603#endif // _LIBCPP_DEBUG 5604} 5605 5606template <class _InputIterator1, class _InputIterator2> 5607inline _LIBCPP_INLINE_VISIBILITY 5608bool 5609lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 5610 _InputIterator2 __first2, _InputIterator2 __last2) 5611{ 5612 return _VSTD::lexicographical_compare(__first1, __last1, __first2, __last2, 5613 __less<typename iterator_traits<_InputIterator1>::value_type, 5614 typename iterator_traits<_InputIterator2>::value_type>()); 5615} 5616 5617// next_permutation 5618 5619template <class _Compare, class _BidirectionalIterator> 5620bool 5621__next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 5622{ 5623 _BidirectionalIterator __i = __last; 5624 if (__first == __last || __first == --__i) 5625 return false; 5626 while (true) 5627 { 5628 _BidirectionalIterator __ip1 = __i; 5629 if (__comp(*--__i, *__ip1)) 5630 { 5631 _BidirectionalIterator __j = __last; 5632 while (!__comp(*__i, *--__j)) 5633 ; 5634 swap(*__i, *__j); 5635 _VSTD::reverse(__ip1, __last); 5636 return true; 5637 } 5638 if (__i == __first) 5639 { 5640 _VSTD::reverse(__first, __last); 5641 return false; 5642 } 5643 } 5644} 5645 5646template <class _BidirectionalIterator, class _Compare> 5647inline _LIBCPP_INLINE_VISIBILITY 5648bool 5649next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 5650{ 5651#ifdef _LIBCPP_DEBUG 5652 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5653 __debug_less<_Compare> __c(__comp); 5654 return __next_permutation<_Comp_ref>(__first, __last, __c); 5655#else // _LIBCPP_DEBUG 5656 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5657 return __next_permutation<_Comp_ref>(__first, __last, __comp); 5658#endif // _LIBCPP_DEBUG 5659} 5660 5661template <class _BidirectionalIterator> 5662inline _LIBCPP_INLINE_VISIBILITY 5663bool 5664next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) 5665{ 5666 return _VSTD::next_permutation(__first, __last, 5667 __less<typename iterator_traits<_BidirectionalIterator>::value_type>()); 5668} 5669 5670// prev_permutation 5671 5672template <class _Compare, class _BidirectionalIterator> 5673bool 5674__prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 5675{ 5676 _BidirectionalIterator __i = __last; 5677 if (__first == __last || __first == --__i) 5678 return false; 5679 while (true) 5680 { 5681 _BidirectionalIterator __ip1 = __i; 5682 if (__comp(*__ip1, *--__i)) 5683 { 5684 _BidirectionalIterator __j = __last; 5685 while (!__comp(*--__j, *__i)) 5686 ; 5687 swap(*__i, *__j); 5688 _VSTD::reverse(__ip1, __last); 5689 return true; 5690 } 5691 if (__i == __first) 5692 { 5693 _VSTD::reverse(__first, __last); 5694 return false; 5695 } 5696 } 5697} 5698 5699template <class _BidirectionalIterator, class _Compare> 5700inline _LIBCPP_INLINE_VISIBILITY 5701bool 5702prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 5703{ 5704#ifdef _LIBCPP_DEBUG 5705 typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 5706 __debug_less<_Compare> __c(__comp); 5707 return __prev_permutation<_Comp_ref>(__first, __last, __c); 5708#else // _LIBCPP_DEBUG 5709 typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 5710 return __prev_permutation<_Comp_ref>(__first, __last, __comp); 5711#endif // _LIBCPP_DEBUG 5712} 5713 5714template <class _BidirectionalIterator> 5715inline _LIBCPP_INLINE_VISIBILITY 5716bool 5717prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) 5718{ 5719 return _VSTD::prev_permutation(__first, __last, 5720 __less<typename iterator_traits<_BidirectionalIterator>::value_type>()); 5721} 5722 5723template <class _Tp> 5724inline _LIBCPP_INLINE_VISIBILITY 5725typename enable_if 5726< 5727 is_integral<_Tp>::value, 5728 _Tp 5729>::type 5730__rotate_left(_Tp __t, _Tp __n = 1) 5731{ 5732 const unsigned __bits = static_cast<unsigned>(sizeof(_Tp) * __CHAR_BIT__ - 1); 5733 __n &= __bits; 5734 return static_cast<_Tp>((__t << __n) | (static_cast<typename make_unsigned<_Tp>::type>(__t) >> (__bits - __n))); 5735} 5736 5737template <class _Tp> 5738inline _LIBCPP_INLINE_VISIBILITY 5739typename enable_if 5740< 5741 is_integral<_Tp>::value, 5742 _Tp 5743>::type 5744__rotate_right(_Tp __t, _Tp __n = 1) 5745{ 5746 const unsigned __bits = static_cast<unsigned>(sizeof(_Tp) * __CHAR_BIT__ - 1); 5747 __n &= __bits; 5748 return static_cast<_Tp>((__t << (__bits - __n)) | (static_cast<typename make_unsigned<_Tp>::type>(__t) >> __n)); 5749} 5750 5751_LIBCPP_END_NAMESPACE_STD 5752 5753#endif // _LIBCPP_ALGORITHM 5754