13e519524SHoward Hinnant// -*- C++ -*- 23e519524SHoward Hinnant//===-------------------------- algorithm ---------------------------------===// 33e519524SHoward Hinnant// 45b08a8a4SHoward Hinnant// The LLVM Compiler Infrastructure 53e519524SHoward Hinnant// 6412dbebeSHoward Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 7412dbebeSHoward Hinnant// Source Licenses. See LICENSE.TXT for details. 83e519524SHoward Hinnant// 93e519524SHoward Hinnant//===----------------------------------------------------------------------===// 103e519524SHoward Hinnant 113e519524SHoward Hinnant#ifndef _LIBCPP_ALGORITHM 123e519524SHoward Hinnant#define _LIBCPP_ALGORITHM 133e519524SHoward Hinnant 143e519524SHoward Hinnant/* 153e519524SHoward Hinnant algorithm synopsis 163e519524SHoward Hinnant 173e519524SHoward Hinnant#include <initializer_list> 183e519524SHoward Hinnant 193e519524SHoward Hinnantnamespace std 203e519524SHoward Hinnant{ 213e519524SHoward Hinnant 223e519524SHoward Hinnanttemplate <class InputIterator, class Predicate> 233e519524SHoward Hinnant bool 243e519524SHoward Hinnant all_of(InputIterator first, InputIterator last, Predicate pred); 253e519524SHoward Hinnant 263e519524SHoward Hinnanttemplate <class InputIterator, class Predicate> 273e519524SHoward Hinnant bool 283e519524SHoward Hinnant any_of(InputIterator first, InputIterator last, Predicate pred); 293e519524SHoward Hinnant 303e519524SHoward Hinnanttemplate <class InputIterator, class Predicate> 313e519524SHoward Hinnant bool 323e519524SHoward Hinnant none_of(InputIterator first, InputIterator last, Predicate pred); 333e519524SHoward Hinnant 343e519524SHoward Hinnanttemplate <class InputIterator, class Function> 353e519524SHoward Hinnant Function 363e519524SHoward Hinnant for_each(InputIterator first, InputIterator last, Function f); 373e519524SHoward Hinnant 383e519524SHoward Hinnanttemplate <class InputIterator, class T> 393e519524SHoward Hinnant InputIterator 403e519524SHoward Hinnant find(InputIterator first, InputIterator last, const T& value); 413e519524SHoward Hinnant 423e519524SHoward Hinnanttemplate <class InputIterator, class Predicate> 433e519524SHoward Hinnant InputIterator 443e519524SHoward Hinnant find_if(InputIterator first, InputIterator last, Predicate pred); 453e519524SHoward Hinnant 463e519524SHoward Hinnanttemplate<class InputIterator, class Predicate> 473e519524SHoward Hinnant InputIterator 483e519524SHoward Hinnant find_if_not(InputIterator first, InputIterator last, Predicate pred); 493e519524SHoward Hinnant 503e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2> 513e519524SHoward Hinnant ForwardIterator1 523e519524SHoward Hinnant find_end(ForwardIterator1 first1, ForwardIterator1 last1, 533e519524SHoward Hinnant ForwardIterator2 first2, ForwardIterator2 last2); 543e519524SHoward Hinnant 553e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 563e519524SHoward Hinnant ForwardIterator1 573e519524SHoward Hinnant find_end(ForwardIterator1 first1, ForwardIterator1 last1, 583e519524SHoward Hinnant ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred); 593e519524SHoward Hinnant 603e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2> 613e519524SHoward Hinnant ForwardIterator1 623e519524SHoward Hinnant find_first_of(ForwardIterator1 first1, ForwardIterator1 last1, 633e519524SHoward Hinnant ForwardIterator2 first2, ForwardIterator2 last2); 643e519524SHoward Hinnant 653e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 663e519524SHoward Hinnant ForwardIterator1 673e519524SHoward Hinnant find_first_of(ForwardIterator1 first1, ForwardIterator1 last1, 683e519524SHoward Hinnant ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred); 693e519524SHoward Hinnant 703e519524SHoward Hinnanttemplate <class ForwardIterator> 713e519524SHoward Hinnant ForwardIterator 723e519524SHoward Hinnant adjacent_find(ForwardIterator first, ForwardIterator last); 733e519524SHoward Hinnant 743e519524SHoward Hinnanttemplate <class ForwardIterator, class BinaryPredicate> 753e519524SHoward Hinnant ForwardIterator 763e519524SHoward Hinnant adjacent_find(ForwardIterator first, ForwardIterator last, BinaryPredicate pred); 773e519524SHoward Hinnant 783e519524SHoward Hinnanttemplate <class InputIterator, class T> 793e519524SHoward Hinnant typename iterator_traits<InputIterator>::difference_type 803e519524SHoward Hinnant count(InputIterator first, InputIterator last, const T& value); 813e519524SHoward Hinnant 823e519524SHoward Hinnanttemplate <class InputIterator, class Predicate> 833e519524SHoward Hinnant typename iterator_traits<InputIterator>::difference_type 843e519524SHoward Hinnant count_if(InputIterator first, InputIterator last, Predicate pred); 853e519524SHoward Hinnant 863e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2> 873e519524SHoward Hinnant pair<InputIterator1, InputIterator2> 883e519524SHoward Hinnant mismatch(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2); 893e519524SHoward Hinnant 900b0bbd2fSMarshall Clowtemplate <class InputIterator1, class InputIterator2> 910b0bbd2fSMarshall Clow pair<InputIterator1, InputIterator2> 920b0bbd2fSMarshall Clow mismatch(InputIterator1 first1, InputIterator1 last1, 930b0bbd2fSMarshall Clow InputIterator2 first2, InputIterator2 last2); // **C++14** 940b0bbd2fSMarshall Clow 953e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class BinaryPredicate> 963e519524SHoward Hinnant pair<InputIterator1, InputIterator2> 973e519524SHoward Hinnant mismatch(InputIterator1 first1, InputIterator1 last1, 983e519524SHoward Hinnant InputIterator2 first2, BinaryPredicate pred); 993e519524SHoward Hinnant 1000b0bbd2fSMarshall Clowtemplate <class InputIterator1, class InputIterator2, class BinaryPredicate> 1010b0bbd2fSMarshall Clow pair<InputIterator1, InputIterator2> 1020b0bbd2fSMarshall Clow mismatch(InputIterator1 first1, InputIterator1 last1, 1030b0bbd2fSMarshall Clow InputIterator2 first2, InputIterator2 last2, 1040b0bbd2fSMarshall Clow BinaryPredicate pred); // **C++14** 1050b0bbd2fSMarshall Clow 1063e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2> 1073e519524SHoward Hinnant bool 1083e519524SHoward Hinnant equal(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2); 1093e519524SHoward Hinnant 1100b0bbd2fSMarshall Clowtemplate <class InputIterator1, class InputIterator2> 1110b0bbd2fSMarshall Clow bool 1120b0bbd2fSMarshall Clow equal(InputIterator1 first1, InputIterator1 last1, 1130b0bbd2fSMarshall Clow InputIterator2 first2, InputIterator2 last2); // **C++14** 1140b0bbd2fSMarshall Clow 1153e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class BinaryPredicate> 1163e519524SHoward Hinnant bool 1173e519524SHoward Hinnant equal(InputIterator1 first1, InputIterator1 last1, 1183e519524SHoward Hinnant InputIterator2 first2, BinaryPredicate pred); 1193e519524SHoward Hinnant 1200b0bbd2fSMarshall Clowtemplate <class InputIterator1, class InputIterator2, class BinaryPredicate> 1210b0bbd2fSMarshall Clow bool 1220b0bbd2fSMarshall Clow equal(InputIterator1 first1, InputIterator1 last1, 1230b0bbd2fSMarshall Clow InputIterator2 first2, InputIterator2 last2, 1240b0bbd2fSMarshall Clow BinaryPredicate pred); // **C++14** 1250b0bbd2fSMarshall Clow 1263e519524SHoward Hinnanttemplate<class ForwardIterator1, class ForwardIterator2> 1273e519524SHoward Hinnant bool 1283e519524SHoward Hinnant is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 1293e519524SHoward Hinnant ForwardIterator2 first2); 1303e519524SHoward Hinnant 1310b0bbd2fSMarshall Clowtemplate<class ForwardIterator1, class ForwardIterator2> 1320b0bbd2fSMarshall Clow bool 1330b0bbd2fSMarshall Clow is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 1340b0bbd2fSMarshall Clow ForwardIterator2 first2, ForwardIterator2 last2); // **C++14** 1350b0bbd2fSMarshall Clow 1363e519524SHoward Hinnanttemplate<class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 1373e519524SHoward Hinnant bool 1383e519524SHoward Hinnant is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 1393e519524SHoward Hinnant ForwardIterator2 first2, BinaryPredicate pred); 1403e519524SHoward Hinnant 1410b0bbd2fSMarshall Clowtemplate<class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 1420b0bbd2fSMarshall Clow bool 1430b0bbd2fSMarshall Clow is_permutation(ForwardIterator1 first1, ForwardIterator1 last1, 1440b0bbd2fSMarshall Clow ForwardIterator2 first2, ForwardIterator2 last2, 1450b0bbd2fSMarshall Clow BinaryPredicate pred); // **C++14** 1460b0bbd2fSMarshall Clow 1473e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2> 1483e519524SHoward Hinnant ForwardIterator1 1493e519524SHoward Hinnant search(ForwardIterator1 first1, ForwardIterator1 last1, 1503e519524SHoward Hinnant ForwardIterator2 first2, ForwardIterator2 last2); 1513e519524SHoward Hinnant 1523e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2, class BinaryPredicate> 1533e519524SHoward Hinnant ForwardIterator1 1543e519524SHoward Hinnant search(ForwardIterator1 first1, ForwardIterator1 last1, 1553e519524SHoward Hinnant ForwardIterator2 first2, ForwardIterator2 last2, BinaryPredicate pred); 1563e519524SHoward Hinnant 1573e519524SHoward Hinnanttemplate <class ForwardIterator, class Size, class T> 1583e519524SHoward Hinnant ForwardIterator 1593e519524SHoward Hinnant search_n(ForwardIterator first, ForwardIterator last, Size count, const T& value); 1603e519524SHoward Hinnant 1613e519524SHoward Hinnanttemplate <class ForwardIterator, class Size, class T, class BinaryPredicate> 1623e519524SHoward Hinnant ForwardIterator 1633e519524SHoward Hinnant search_n(ForwardIterator first, ForwardIterator last, 1643e519524SHoward Hinnant Size count, const T& value, BinaryPredicate pred); 1653e519524SHoward Hinnant 1663e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator> 1673e519524SHoward Hinnant OutputIterator 1683e519524SHoward Hinnant copy(InputIterator first, InputIterator last, OutputIterator result); 1693e519524SHoward Hinnant 1703e519524SHoward Hinnanttemplate<class InputIterator, class OutputIterator, class Predicate> 1713e519524SHoward Hinnant OutputIterator 1723e519524SHoward Hinnant copy_if(InputIterator first, InputIterator last, 1733e519524SHoward Hinnant OutputIterator result, Predicate pred); 1743e519524SHoward Hinnant 1753e519524SHoward Hinnanttemplate<class InputIterator, class Size, class OutputIterator> 1763e519524SHoward Hinnant OutputIterator 1773e519524SHoward Hinnant copy_n(InputIterator first, Size n, OutputIterator result); 1783e519524SHoward Hinnant 1793e519524SHoward Hinnanttemplate <class BidirectionalIterator1, class BidirectionalIterator2> 1803e519524SHoward Hinnant BidirectionalIterator2 1813e519524SHoward Hinnant copy_backward(BidirectionalIterator1 first, BidirectionalIterator1 last, 1823e519524SHoward Hinnant BidirectionalIterator2 result); 1833e519524SHoward Hinnant 1843e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2> 1853e519524SHoward Hinnant ForwardIterator2 1863e519524SHoward Hinnant swap_ranges(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2); 1873e519524SHoward Hinnant 1883e519524SHoward Hinnanttemplate <class ForwardIterator1, class ForwardIterator2> 1893e519524SHoward Hinnant void 1903e519524SHoward Hinnant iter_swap(ForwardIterator1 a, ForwardIterator2 b); 1913e519524SHoward Hinnant 1923e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator, class UnaryOperation> 1933e519524SHoward Hinnant OutputIterator 1943e519524SHoward Hinnant transform(InputIterator first, InputIterator last, OutputIterator result, UnaryOperation op); 1953e519524SHoward Hinnant 1963e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator, class BinaryOperation> 1973e519524SHoward Hinnant OutputIterator 1983e519524SHoward Hinnant transform(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, 1993e519524SHoward Hinnant OutputIterator result, BinaryOperation binary_op); 2003e519524SHoward Hinnant 2013e519524SHoward Hinnanttemplate <class ForwardIterator, class T> 2023e519524SHoward Hinnant void 2033e519524SHoward Hinnant replace(ForwardIterator first, ForwardIterator last, const T& old_value, const T& new_value); 2043e519524SHoward Hinnant 2053e519524SHoward Hinnanttemplate <class ForwardIterator, class Predicate, class T> 2063e519524SHoward Hinnant void 2073e519524SHoward Hinnant replace_if(ForwardIterator first, ForwardIterator last, Predicate pred, const T& new_value); 2083e519524SHoward Hinnant 2093e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator, class T> 2103e519524SHoward Hinnant OutputIterator 2113e519524SHoward Hinnant replace_copy(InputIterator first, InputIterator last, OutputIterator result, 2123e519524SHoward Hinnant const T& old_value, const T& new_value); 2133e519524SHoward Hinnant 2143e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator, class Predicate, class T> 2153e519524SHoward Hinnant OutputIterator 2163e519524SHoward Hinnant replace_copy_if(InputIterator first, InputIterator last, OutputIterator result, Predicate pred, const T& new_value); 2173e519524SHoward Hinnant 2183e519524SHoward Hinnanttemplate <class ForwardIterator, class T> 2193e519524SHoward Hinnant void 2203e519524SHoward Hinnant fill(ForwardIterator first, ForwardIterator last, const T& value); 2213e519524SHoward Hinnant 2223e519524SHoward Hinnanttemplate <class OutputIterator, class Size, class T> 2233e519524SHoward Hinnant OutputIterator 2243e519524SHoward Hinnant fill_n(OutputIterator first, Size n, const T& value); 2253e519524SHoward Hinnant 2263e519524SHoward Hinnanttemplate <class ForwardIterator, class Generator> 2273e519524SHoward Hinnant void 2283e519524SHoward Hinnant generate(ForwardIterator first, ForwardIterator last, Generator gen); 2293e519524SHoward Hinnant 2303e519524SHoward Hinnanttemplate <class OutputIterator, class Size, class Generator> 2313e519524SHoward Hinnant OutputIterator 2323e519524SHoward Hinnant generate_n(OutputIterator first, Size n, Generator gen); 2333e519524SHoward Hinnant 2343e519524SHoward Hinnanttemplate <class ForwardIterator, class T> 2353e519524SHoward Hinnant ForwardIterator 2363e519524SHoward Hinnant remove(ForwardIterator first, ForwardIterator last, const T& value); 2373e519524SHoward Hinnant 2383e519524SHoward Hinnanttemplate <class ForwardIterator, class Predicate> 2393e519524SHoward Hinnant ForwardIterator 2403e519524SHoward Hinnant remove_if(ForwardIterator first, ForwardIterator last, Predicate pred); 2413e519524SHoward Hinnant 2423e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator, class T> 2433e519524SHoward Hinnant OutputIterator 2443e519524SHoward Hinnant remove_copy(InputIterator first, InputIterator last, OutputIterator result, const T& value); 2453e519524SHoward Hinnant 2463e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator, class Predicate> 2473e519524SHoward Hinnant OutputIterator 2483e519524SHoward Hinnant remove_copy_if(InputIterator first, InputIterator last, OutputIterator result, Predicate pred); 2493e519524SHoward Hinnant 2503e519524SHoward Hinnanttemplate <class ForwardIterator> 2513e519524SHoward Hinnant ForwardIterator 2523e519524SHoward Hinnant unique(ForwardIterator first, ForwardIterator last); 2533e519524SHoward Hinnant 2543e519524SHoward Hinnanttemplate <class ForwardIterator, class BinaryPredicate> 2553e519524SHoward Hinnant ForwardIterator 2563e519524SHoward Hinnant unique(ForwardIterator first, ForwardIterator last, BinaryPredicate pred); 2573e519524SHoward Hinnant 2583e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator> 2593e519524SHoward Hinnant OutputIterator 2603e519524SHoward Hinnant unique_copy(InputIterator first, InputIterator last, OutputIterator result); 2613e519524SHoward Hinnant 2623e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator, class BinaryPredicate> 2633e519524SHoward Hinnant OutputIterator 2643e519524SHoward Hinnant unique_copy(InputIterator first, InputIterator last, OutputIterator result, BinaryPredicate pred); 2653e519524SHoward Hinnant 2663e519524SHoward Hinnanttemplate <class BidirectionalIterator> 2673e519524SHoward Hinnant void 2683e519524SHoward Hinnant reverse(BidirectionalIterator first, BidirectionalIterator last); 2693e519524SHoward Hinnant 2703e519524SHoward Hinnanttemplate <class BidirectionalIterator, class OutputIterator> 2713e519524SHoward Hinnant OutputIterator 2723e519524SHoward Hinnant reverse_copy(BidirectionalIterator first, BidirectionalIterator last, OutputIterator result); 2733e519524SHoward Hinnant 2743e519524SHoward Hinnanttemplate <class ForwardIterator> 2753e519524SHoward Hinnant ForwardIterator 2763e519524SHoward Hinnant rotate(ForwardIterator first, ForwardIterator middle, ForwardIterator last); 2773e519524SHoward Hinnant 2783e519524SHoward Hinnanttemplate <class ForwardIterator, class OutputIterator> 2793e519524SHoward Hinnant OutputIterator 2803e519524SHoward Hinnant rotate_copy(ForwardIterator first, ForwardIterator middle, ForwardIterator last, OutputIterator result); 2813e519524SHoward Hinnant 2823e519524SHoward Hinnanttemplate <class RandomAccessIterator> 2833e519524SHoward Hinnant void 28406965c1fSMarshall Clow random_shuffle(RandomAccessIterator first, RandomAccessIterator last); // deprecated in C++14 2853e519524SHoward Hinnant 2863e519524SHoward Hinnanttemplate <class RandomAccessIterator, class RandomNumberGenerator> 2873e519524SHoward Hinnant void 28806965c1fSMarshall Clow random_shuffle(RandomAccessIterator first, RandomAccessIterator last, 28906965c1fSMarshall Clow RandomNumberGenerator& rand); // deprecated in C++14 2903e519524SHoward Hinnant 291e7154709SEric Fiseliertemplate<class PopulationIterator, class SampleIterator, 292e7154709SEric Fiselier class Distance, class UniformRandomBitGenerator> 293e7154709SEric Fiselier SampleIterator sample(PopulationIterator first, PopulationIterator last, 294e7154709SEric Fiselier SampleIterator out, Distance n, 295e7154709SEric Fiselier UniformRandomBitGenerator&& g); // C++17 296e7154709SEric Fiselier 297f9d540b0SHoward Hinnanttemplate<class RandomAccessIterator, class UniformRandomNumberGenerator> 298f9d540b0SHoward Hinnant void shuffle(RandomAccessIterator first, RandomAccessIterator last, 299fb340102SHoward Hinnant UniformRandomNumberGenerator&& g); 300f9d540b0SHoward Hinnant 3013e519524SHoward Hinnanttemplate <class InputIterator, class Predicate> 3023e519524SHoward Hinnant bool 3033e519524SHoward Hinnant is_partitioned(InputIterator first, InputIterator last, Predicate pred); 3043e519524SHoward Hinnant 3053e519524SHoward Hinnanttemplate <class ForwardIterator, class Predicate> 3063e519524SHoward Hinnant ForwardIterator 3073e519524SHoward Hinnant partition(ForwardIterator first, ForwardIterator last, Predicate pred); 3083e519524SHoward Hinnant 3093e519524SHoward Hinnanttemplate <class InputIterator, class OutputIterator1, 3103e519524SHoward Hinnant class OutputIterator2, class Predicate> 3113e519524SHoward Hinnant pair<OutputIterator1, OutputIterator2> 3123e519524SHoward Hinnant partition_copy(InputIterator first, InputIterator last, 3133e519524SHoward Hinnant OutputIterator1 out_true, OutputIterator2 out_false, 3143e519524SHoward Hinnant Predicate pred); 3153e519524SHoward Hinnant 3163e519524SHoward Hinnanttemplate <class ForwardIterator, class Predicate> 3173e519524SHoward Hinnant ForwardIterator 3183e519524SHoward Hinnant stable_partition(ForwardIterator first, ForwardIterator last, Predicate pred); 3193e519524SHoward Hinnant 3203e519524SHoward Hinnanttemplate<class ForwardIterator, class Predicate> 3213e519524SHoward Hinnant ForwardIterator 3223e519524SHoward Hinnant partition_point(ForwardIterator first, ForwardIterator last, Predicate pred); 3233e519524SHoward Hinnant 3243e519524SHoward Hinnanttemplate <class ForwardIterator> 3253e519524SHoward Hinnant bool 3263e519524SHoward Hinnant is_sorted(ForwardIterator first, ForwardIterator last); 3273e519524SHoward Hinnant 3283e519524SHoward Hinnanttemplate <class ForwardIterator, class Compare> 3293e519524SHoward Hinnant bool 3303e519524SHoward Hinnant is_sorted(ForwardIterator first, ForwardIterator last, Compare comp); 3313e519524SHoward Hinnant 3323e519524SHoward Hinnanttemplate<class ForwardIterator> 3333e519524SHoward Hinnant ForwardIterator 3343e519524SHoward Hinnant is_sorted_until(ForwardIterator first, ForwardIterator last); 3353e519524SHoward Hinnant 3363e519524SHoward Hinnanttemplate <class ForwardIterator, class Compare> 3373e519524SHoward Hinnant ForwardIterator 3383e519524SHoward Hinnant is_sorted_until(ForwardIterator first, ForwardIterator last, Compare comp); 3393e519524SHoward Hinnant 3403e519524SHoward Hinnanttemplate <class RandomAccessIterator> 3413e519524SHoward Hinnant void 3423e519524SHoward Hinnant sort(RandomAccessIterator first, RandomAccessIterator last); 3433e519524SHoward Hinnant 3443e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 3453e519524SHoward Hinnant void 3463e519524SHoward Hinnant sort(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 3473e519524SHoward Hinnant 3483e519524SHoward Hinnanttemplate <class RandomAccessIterator> 3493e519524SHoward Hinnant void 3503e519524SHoward Hinnant stable_sort(RandomAccessIterator first, RandomAccessIterator last); 3513e519524SHoward Hinnant 3523e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 3533e519524SHoward Hinnant void 3543e519524SHoward Hinnant stable_sort(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 3553e519524SHoward Hinnant 3563e519524SHoward Hinnanttemplate <class RandomAccessIterator> 3573e519524SHoward Hinnant void 3583e519524SHoward Hinnant partial_sort(RandomAccessIterator first, RandomAccessIterator middle, RandomAccessIterator last); 3593e519524SHoward Hinnant 3603e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 3613e519524SHoward Hinnant void 3623e519524SHoward Hinnant partial_sort(RandomAccessIterator first, RandomAccessIterator middle, RandomAccessIterator last, Compare comp); 3633e519524SHoward Hinnant 3643e519524SHoward Hinnanttemplate <class InputIterator, class RandomAccessIterator> 3653e519524SHoward Hinnant RandomAccessIterator 3663e519524SHoward Hinnant partial_sort_copy(InputIterator first, InputIterator last, 3673e519524SHoward Hinnant RandomAccessIterator result_first, RandomAccessIterator result_last); 3683e519524SHoward Hinnant 3693e519524SHoward Hinnanttemplate <class InputIterator, class RandomAccessIterator, class Compare> 3703e519524SHoward Hinnant RandomAccessIterator 3713e519524SHoward Hinnant partial_sort_copy(InputIterator first, InputIterator last, 3723e519524SHoward Hinnant RandomAccessIterator result_first, RandomAccessIterator result_last, Compare comp); 3733e519524SHoward Hinnant 3743e519524SHoward Hinnanttemplate <class RandomAccessIterator> 3753e519524SHoward Hinnant void 3763e519524SHoward Hinnant nth_element(RandomAccessIterator first, RandomAccessIterator nth, RandomAccessIterator last); 3773e519524SHoward Hinnant 3783e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 3793e519524SHoward Hinnant void 3803e519524SHoward Hinnant nth_element(RandomAccessIterator first, RandomAccessIterator nth, RandomAccessIterator last, Compare comp); 3813e519524SHoward Hinnant 3823e519524SHoward Hinnanttemplate <class ForwardIterator, class T> 3833e519524SHoward Hinnant ForwardIterator 3843e519524SHoward Hinnant lower_bound(ForwardIterator first, ForwardIterator last, const T& value); 3853e519524SHoward Hinnant 3863e519524SHoward Hinnanttemplate <class ForwardIterator, class T, class Compare> 3873e519524SHoward Hinnant ForwardIterator 3883e519524SHoward Hinnant lower_bound(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 3893e519524SHoward Hinnant 3903e519524SHoward Hinnanttemplate <class ForwardIterator, class T> 3913e519524SHoward Hinnant ForwardIterator 3923e519524SHoward Hinnant upper_bound(ForwardIterator first, ForwardIterator last, const T& value); 3933e519524SHoward Hinnant 3943e519524SHoward Hinnanttemplate <class ForwardIterator, class T, class Compare> 3953e519524SHoward Hinnant ForwardIterator 3963e519524SHoward Hinnant upper_bound(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 3973e519524SHoward Hinnant 3983e519524SHoward Hinnanttemplate <class ForwardIterator, class T> 3993e519524SHoward Hinnant pair<ForwardIterator, ForwardIterator> 4003e519524SHoward Hinnant equal_range(ForwardIterator first, ForwardIterator last, const T& value); 4013e519524SHoward Hinnant 4023e519524SHoward Hinnanttemplate <class ForwardIterator, class T, class Compare> 4033e519524SHoward Hinnant pair<ForwardIterator, ForwardIterator> 4043e519524SHoward Hinnant equal_range(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 4053e519524SHoward Hinnant 4063e519524SHoward Hinnanttemplate <class ForwardIterator, class T> 4073e519524SHoward Hinnant bool 4083e519524SHoward Hinnant binary_search(ForwardIterator first, ForwardIterator last, const T& value); 4093e519524SHoward Hinnant 4103e519524SHoward Hinnanttemplate <class ForwardIterator, class T, class Compare> 4113e519524SHoward Hinnant bool 4123e519524SHoward Hinnant binary_search(ForwardIterator first, ForwardIterator last, const T& value, Compare comp); 4133e519524SHoward Hinnant 4143e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator> 4153e519524SHoward Hinnant OutputIterator 4163e519524SHoward Hinnant merge(InputIterator1 first1, InputIterator1 last1, 4173e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result); 4183e519524SHoward Hinnant 4193e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 4203e519524SHoward Hinnant OutputIterator 4213e519524SHoward Hinnant merge(InputIterator1 first1, InputIterator1 last1, 4223e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 4233e519524SHoward Hinnant 4243e519524SHoward Hinnanttemplate <class BidirectionalIterator> 4253e519524SHoward Hinnant void 4263e519524SHoward Hinnant inplace_merge(BidirectionalIterator first, BidirectionalIterator middle, BidirectionalIterator last); 4273e519524SHoward Hinnant 4283e519524SHoward Hinnanttemplate <class BidirectionalIterator, class Compare> 4293e519524SHoward Hinnant void 4303e519524SHoward Hinnant inplace_merge(BidirectionalIterator first, BidirectionalIterator middle, BidirectionalIterator last, Compare comp); 4313e519524SHoward Hinnant 4323e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2> 4333e519524SHoward Hinnant bool 4343e519524SHoward Hinnant includes(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2); 4353e519524SHoward Hinnant 4363e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class Compare> 4373e519524SHoward Hinnant bool 4383e519524SHoward Hinnant includes(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2, Compare comp); 4393e519524SHoward Hinnant 4403e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator> 4413e519524SHoward Hinnant OutputIterator 4423e519524SHoward Hinnant set_union(InputIterator1 first1, InputIterator1 last1, 4433e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result); 4443e519524SHoward Hinnant 4453e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 4463e519524SHoward Hinnant OutputIterator 4473e519524SHoward Hinnant set_union(InputIterator1 first1, InputIterator1 last1, 4483e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 4493e519524SHoward Hinnant 4503e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator> 4513e519524SHoward Hinnant OutputIterator 4523e519524SHoward Hinnant set_intersection(InputIterator1 first1, InputIterator1 last1, 4533e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result); 4543e519524SHoward Hinnant 4553e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 4563e519524SHoward Hinnant OutputIterator 4573e519524SHoward Hinnant set_intersection(InputIterator1 first1, InputIterator1 last1, 4583e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 4593e519524SHoward Hinnant 4603e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator> 4613e519524SHoward Hinnant OutputIterator 4623e519524SHoward Hinnant set_difference(InputIterator1 first1, InputIterator1 last1, 4633e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result); 4643e519524SHoward Hinnant 4653e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 4663e519524SHoward Hinnant OutputIterator 4673e519524SHoward Hinnant set_difference(InputIterator1 first1, InputIterator1 last1, 4683e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 4693e519524SHoward Hinnant 4703e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator> 4713e519524SHoward Hinnant OutputIterator 4723e519524SHoward Hinnant set_symmetric_difference(InputIterator1 first1, InputIterator1 last1, 4733e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result); 4743e519524SHoward Hinnant 4753e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class OutputIterator, class Compare> 4763e519524SHoward Hinnant OutputIterator 4773e519524SHoward Hinnant set_symmetric_difference(InputIterator1 first1, InputIterator1 last1, 4783e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, OutputIterator result, Compare comp); 4793e519524SHoward Hinnant 4803e519524SHoward Hinnanttemplate <class RandomAccessIterator> 4813e519524SHoward Hinnant void 4823e519524SHoward Hinnant push_heap(RandomAccessIterator first, RandomAccessIterator last); 4833e519524SHoward Hinnant 4843e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 4853e519524SHoward Hinnant void 4863e519524SHoward Hinnant push_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 4873e519524SHoward Hinnant 4883e519524SHoward Hinnanttemplate <class RandomAccessIterator> 4893e519524SHoward Hinnant void 4903e519524SHoward Hinnant pop_heap(RandomAccessIterator first, RandomAccessIterator last); 4913e519524SHoward Hinnant 4923e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 4933e519524SHoward Hinnant void 4943e519524SHoward Hinnant pop_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 4953e519524SHoward Hinnant 4963e519524SHoward Hinnanttemplate <class RandomAccessIterator> 4973e519524SHoward Hinnant void 4983e519524SHoward Hinnant make_heap(RandomAccessIterator first, RandomAccessIterator last); 4993e519524SHoward Hinnant 5003e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 5013e519524SHoward Hinnant void 5023e519524SHoward Hinnant make_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 5033e519524SHoward Hinnant 5043e519524SHoward Hinnanttemplate <class RandomAccessIterator> 5053e519524SHoward Hinnant void 5063e519524SHoward Hinnant sort_heap(RandomAccessIterator first, RandomAccessIterator last); 5073e519524SHoward Hinnant 5083e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 5093e519524SHoward Hinnant void 5103e519524SHoward Hinnant sort_heap(RandomAccessIterator first, RandomAccessIterator last, Compare comp); 5113e519524SHoward Hinnant 5123e519524SHoward Hinnanttemplate <class RandomAccessIterator> 5133e519524SHoward Hinnant bool 5143e519524SHoward Hinnant is_heap(RandomAccessIterator first, RandomAccessiterator last); 5153e519524SHoward Hinnant 5163e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 5173e519524SHoward Hinnant bool 5183e519524SHoward Hinnant is_heap(RandomAccessIterator first, RandomAccessiterator last, Compare comp); 5193e519524SHoward Hinnant 5203e519524SHoward Hinnanttemplate <class RandomAccessIterator> 5213e519524SHoward Hinnant RandomAccessIterator 5223e519524SHoward Hinnant is_heap_until(RandomAccessIterator first, RandomAccessiterator last); 5233e519524SHoward Hinnant 5243e519524SHoward Hinnanttemplate <class RandomAccessIterator, class Compare> 5253e519524SHoward Hinnant RandomAccessIterator 5263e519524SHoward Hinnant is_heap_until(RandomAccessIterator first, RandomAccessiterator last, Compare comp); 5273e519524SHoward Hinnant 5284eb27b79SHoward Hinnanttemplate <class ForwardIterator> 5294eb27b79SHoward Hinnant ForwardIterator 5300b0671aeSMarshall Clow min_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14 5314eb27b79SHoward Hinnant 5324eb27b79SHoward Hinnanttemplate <class ForwardIterator, class Compare> 5334eb27b79SHoward Hinnant ForwardIterator 5340b0671aeSMarshall Clow min_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14 5354eb27b79SHoward Hinnant 5363e519524SHoward Hinnanttemplate <class T> 5373e519524SHoward Hinnant const T& 5389d67c6d5SMarshall Clow min(const T& a, const T& b); // constexpr in C++14 5393e519524SHoward Hinnant 5403e519524SHoward Hinnanttemplate <class T, class Compare> 5413e519524SHoward Hinnant const T& 5429d67c6d5SMarshall Clow min(const T& a, const T& b, Compare comp); // constexpr in C++14 5433e519524SHoward Hinnant 5443e519524SHoward Hinnanttemplate<class T> 5454eb27b79SHoward Hinnant T 5469d67c6d5SMarshall Clow min(initializer_list<T> t); // constexpr in C++14 5473e519524SHoward Hinnant 5483e519524SHoward Hinnanttemplate<class T, class Compare> 5494eb27b79SHoward Hinnant T 5509d67c6d5SMarshall Clow min(initializer_list<T> t, Compare comp); // constexpr in C++14 5513e519524SHoward Hinnant 552146c14acSMarshall Clowtemplate<class T> 553146c14acSMarshall Clow constexpr const T& clamp( const T& v, const T& lo, const T& hi ); // C++17 554146c14acSMarshall Clow 555146c14acSMarshall Clowtemplate<class T, class Compare> 556146c14acSMarshall Clow constexpr const T& clamp( const T& v, const T& lo, const T& hi, Compare comp ); // C++17 557146c14acSMarshall Clow 5583e519524SHoward Hinnanttemplate <class ForwardIterator> 5593e519524SHoward Hinnant ForwardIterator 5600b0671aeSMarshall Clow max_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14 5613e519524SHoward Hinnant 5623e519524SHoward Hinnanttemplate <class ForwardIterator, class Compare> 5633e519524SHoward Hinnant ForwardIterator 5640b0671aeSMarshall Clow max_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14 5653e519524SHoward Hinnant 5664eb27b79SHoward Hinnanttemplate <class T> 5674eb27b79SHoward Hinnant const T& 5689d67c6d5SMarshall Clow max(const T& a, const T& b); // constexpr in C++14 5694eb27b79SHoward Hinnant 5704eb27b79SHoward Hinnanttemplate <class T, class Compare> 5714eb27b79SHoward Hinnant const T& 5729d67c6d5SMarshall Clow max(const T& a, const T& b, Compare comp); // constexpr in C++14 5734eb27b79SHoward Hinnant 5744eb27b79SHoward Hinnanttemplate<class T> 5754eb27b79SHoward Hinnant T 5769d67c6d5SMarshall Clow max(initializer_list<T> t); // constexpr in C++14 5774eb27b79SHoward Hinnant 5784eb27b79SHoward Hinnanttemplate<class T, class Compare> 5794eb27b79SHoward Hinnant T 5809d67c6d5SMarshall Clow max(initializer_list<T> t, Compare comp); // constexpr in C++14 5814eb27b79SHoward Hinnant 5824eb27b79SHoward Hinnanttemplate<class ForwardIterator> 5834eb27b79SHoward Hinnant pair<ForwardIterator, ForwardIterator> 5840b0671aeSMarshall Clow minmax_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14 5854eb27b79SHoward Hinnant 5864eb27b79SHoward Hinnanttemplate<class ForwardIterator, class Compare> 5874eb27b79SHoward Hinnant pair<ForwardIterator, ForwardIterator> 5880b0671aeSMarshall Clow minmax_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14 5894eb27b79SHoward Hinnant 5904eb27b79SHoward Hinnanttemplate<class T> 5914eb27b79SHoward Hinnant pair<const T&, const T&> 5929d67c6d5SMarshall Clow minmax(const T& a, const T& b); // constexpr in C++14 5934eb27b79SHoward Hinnant 5944eb27b79SHoward Hinnanttemplate<class T, class Compare> 5954eb27b79SHoward Hinnant pair<const T&, const T&> 5969d67c6d5SMarshall Clow minmax(const T& a, const T& b, Compare comp); // constexpr in C++14 5974eb27b79SHoward Hinnant 5984eb27b79SHoward Hinnanttemplate<class T> 5994eb27b79SHoward Hinnant pair<T, T> 6009d67c6d5SMarshall Clow minmax(initializer_list<T> t); // constexpr in C++14 6014eb27b79SHoward Hinnant 6024eb27b79SHoward Hinnanttemplate<class T, class Compare> 6034eb27b79SHoward Hinnant pair<T, T> 6049d67c6d5SMarshall Clow minmax(initializer_list<T> t, Compare comp); // constexpr in C++14 6054eb27b79SHoward Hinnant 6063e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2> 6073e519524SHoward Hinnant bool 6083e519524SHoward Hinnant lexicographical_compare(InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2); 6093e519524SHoward Hinnant 6103e519524SHoward Hinnanttemplate <class InputIterator1, class InputIterator2, class Compare> 6113e519524SHoward Hinnant bool 6123e519524SHoward Hinnant lexicographical_compare(InputIterator1 first1, InputIterator1 last1, 6133e519524SHoward Hinnant InputIterator2 first2, InputIterator2 last2, Compare comp); 6143e519524SHoward Hinnant 6153e519524SHoward Hinnanttemplate <class BidirectionalIterator> 6163e519524SHoward Hinnant bool 6173e519524SHoward Hinnant next_permutation(BidirectionalIterator first, BidirectionalIterator last); 6183e519524SHoward Hinnant 6193e519524SHoward Hinnanttemplate <class BidirectionalIterator, class Compare> 6203e519524SHoward Hinnant bool 6213e519524SHoward Hinnant next_permutation(BidirectionalIterator first, BidirectionalIterator last, Compare comp); 6223e519524SHoward Hinnant 6233e519524SHoward Hinnanttemplate <class BidirectionalIterator> 6243e519524SHoward Hinnant bool 6253e519524SHoward Hinnant prev_permutation(BidirectionalIterator first, BidirectionalIterator last); 6263e519524SHoward Hinnant 6273e519524SHoward Hinnanttemplate <class BidirectionalIterator, class Compare> 6283e519524SHoward Hinnant bool 6293e519524SHoward Hinnant prev_permutation(BidirectionalIterator first, BidirectionalIterator last, Compare comp); 6303e519524SHoward Hinnant 6313e519524SHoward Hinnant} // std 6323e519524SHoward Hinnant 6333e519524SHoward Hinnant*/ 6343e519524SHoward Hinnant 6353e519524SHoward Hinnant#include <__config> 6363e519524SHoward Hinnant#include <initializer_list> 6373e519524SHoward Hinnant#include <type_traits> 6383e519524SHoward Hinnant#include <cstring> 639f07dd8d0SEric Fiselier#include <utility> // needed to provide swap_ranges. 6403e519524SHoward Hinnant#include <memory> 6413e519524SHoward Hinnant#include <iterator> 642a1d07d57SHoward Hinnant#include <cstddef> 6433e519524SHoward Hinnant 6445d1a701dSHoward Hinnant#if defined(__IBMCPP__) 6455d1a701dSHoward Hinnant#include "support/ibm/support.h" 6465d1a701dSHoward Hinnant#endif 6475f878d4bSHoward Hinnant#if defined(_LIBCPP_MSVCRT) || defined(__MINGW32__) 6485f878d4bSHoward Hinnant#include "support/win32/support.h" 6495f878d4bSHoward Hinnant#endif 6505d1a701dSHoward Hinnant 651ab4f4382SHoward Hinnant#include <__undef_min_max> 652ab4f4382SHoward Hinnant 653c1bd9197SEric Fiselier#include <__debug> 654c1bd9197SEric Fiselier 655073458b1SHoward Hinnant#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 6563e519524SHoward Hinnant#pragma GCC system_header 657073458b1SHoward Hinnant#endif 6583e519524SHoward Hinnant 6593e519524SHoward Hinnant_LIBCPP_BEGIN_NAMESPACE_STD 6603e519524SHoward Hinnant 6619d67c6d5SMarshall Clow// I'd like to replace these with _VSTD::equal_to<void>, but can't because: 6629d67c6d5SMarshall Clow// * That only works with C++14 and later, and 6639d67c6d5SMarshall Clow// * We haven't included <functional> here. 6643e519524SHoward Hinnanttemplate <class _T1, class _T2 = _T1> 6653e519524SHoward Hinnantstruct __equal_to 6663e519524SHoward Hinnant{ 6673e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 6683e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY bool operator()(const _T1& __x, const _T2& __y) const {return __x == __y;} 6693e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY bool operator()(const _T2& __x, const _T1& __y) const {return __x == __y;} 6703e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY bool operator()(const _T2& __x, const _T2& __y) const {return __x == __y;} 6713e519524SHoward Hinnant}; 6723e519524SHoward Hinnant 6733e519524SHoward Hinnanttemplate <class _T1> 6743e519524SHoward Hinnantstruct __equal_to<_T1, _T1> 6753e519524SHoward Hinnant{ 6769d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 6779d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 6783e519524SHoward Hinnant}; 6793e519524SHoward Hinnant 6803e519524SHoward Hinnanttemplate <class _T1> 6813e519524SHoward Hinnantstruct __equal_to<const _T1, _T1> 6823e519524SHoward Hinnant{ 6839d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 6849d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 6853e519524SHoward Hinnant}; 6863e519524SHoward Hinnant 6873e519524SHoward Hinnanttemplate <class _T1> 6883e519524SHoward Hinnantstruct __equal_to<_T1, const _T1> 6893e519524SHoward Hinnant{ 6909d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 6919d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T1& __y) const {return __x == __y;} 6923e519524SHoward Hinnant}; 6933e519524SHoward Hinnant 6943e519524SHoward Hinnanttemplate <class _T1, class _T2 = _T1> 6953e519524SHoward Hinnantstruct __less 6963e519524SHoward Hinnant{ 6979d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 6989d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 6999d67c6d5SMarshall Clow 7009d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 7019d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T2& __y) const {return __x < __y;} 7029d67c6d5SMarshall Clow 7039d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 7049d67c6d5SMarshall Clow bool operator()(const _T2& __x, const _T1& __y) const {return __x < __y;} 7059d67c6d5SMarshall Clow 7069d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 7079d67c6d5SMarshall Clow bool operator()(const _T2& __x, const _T2& __y) const {return __x < __y;} 7083e519524SHoward Hinnant}; 7093e519524SHoward Hinnant 7103e519524SHoward Hinnanttemplate <class _T1> 7113e519524SHoward Hinnantstruct __less<_T1, _T1> 7123e519524SHoward Hinnant{ 7139d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 7149d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 7153e519524SHoward Hinnant}; 7163e519524SHoward Hinnant 7173e519524SHoward Hinnanttemplate <class _T1> 7183e519524SHoward Hinnantstruct __less<const _T1, _T1> 7193e519524SHoward Hinnant{ 7209d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 7219d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 7223e519524SHoward Hinnant}; 7233e519524SHoward Hinnant 7243e519524SHoward Hinnanttemplate <class _T1> 7253e519524SHoward Hinnantstruct __less<_T1, const _T1> 7263e519524SHoward Hinnant{ 7279d67c6d5SMarshall Clow _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 7289d67c6d5SMarshall Clow bool operator()(const _T1& __x, const _T1& __y) const {return __x < __y;} 7293e519524SHoward Hinnant}; 7303e519524SHoward Hinnant 7313e519524SHoward Hinnanttemplate <class _Predicate> 7323e519524SHoward Hinnantclass __negate 7333e519524SHoward Hinnant{ 7343e519524SHoward Hinnantprivate: 7353e519524SHoward Hinnant _Predicate __p_; 7363e519524SHoward Hinnantpublic: 7373e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY __negate() {} 7383e519524SHoward Hinnant 7393e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY 7403e519524SHoward Hinnant explicit __negate(_Predicate __p) : __p_(__p) {} 7413e519524SHoward Hinnant 7423e519524SHoward Hinnant template <class _T1> 7433e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY 7443e519524SHoward Hinnant bool operator()(const _T1& __x) {return !__p_(__x);} 7453e519524SHoward Hinnant 7463e519524SHoward Hinnant template <class _T1, class _T2> 7473e519524SHoward Hinnant _LIBCPP_INLINE_VISIBILITY 7483e519524SHoward Hinnant bool operator()(const _T1& __x, const _T2& __y) {return !__p_(__x, __y);} 7493e519524SHoward Hinnant}; 7503e519524SHoward Hinnant 751145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 7523e519524SHoward Hinnant 7533e519524SHoward Hinnanttemplate <class _Compare> 7543e519524SHoward Hinnantstruct __debug_less 7553e519524SHoward Hinnant{ 7563e519524SHoward Hinnant _Compare __comp_; 7573e519524SHoward Hinnant __debug_less(_Compare& __c) : __comp_(__c) {} 758331d2159SEric Fiselier 7593e519524SHoward Hinnant template <class _Tp, class _Up> 7603e519524SHoward Hinnant bool operator()(const _Tp& __x, const _Up& __y) 7613e519524SHoward Hinnant { 7623e519524SHoward Hinnant bool __r = __comp_(__x, __y); 7633e519524SHoward Hinnant if (__r) 764331d2159SEric Fiselier __do_compare_assert(0, __y, __x); 7653e519524SHoward Hinnant return __r; 7663e519524SHoward Hinnant } 767331d2159SEric Fiselier 768331d2159SEric Fiselier template <class _LHS, class _RHS> 769331d2159SEric Fiselier inline _LIBCPP_INLINE_VISIBILITY 770331d2159SEric Fiselier decltype((void)_VSTD::declval<_Compare&>()( 771331d2159SEric Fiselier _VSTD::declval<_LHS const&>(), _VSTD::declval<_RHS const&>())) 772331d2159SEric Fiselier __do_compare_assert(int, _LHS const& __l, _RHS const& __r) { 773331d2159SEric Fiselier _LIBCPP_ASSERT(!__comp_(__l, __r), 774331d2159SEric Fiselier "Comparator does not induce a strict weak ordering"); 775331d2159SEric Fiselier } 776331d2159SEric Fiselier 777331d2159SEric Fiselier template <class _LHS, class _RHS> 778331d2159SEric Fiselier inline _LIBCPP_INLINE_VISIBILITY 779331d2159SEric Fiselier void __do_compare_assert(long, _LHS const&, _RHS const&) {} 7803e519524SHoward Hinnant}; 7813e519524SHoward Hinnant 782145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 7833e519524SHoward Hinnant 784c8edcb36SHoward Hinnant// Precondition: __x != 0 785c206366fSHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 786c206366fSHoward Hinnantunsigned 787c206366fSHoward Hinnant__ctz(unsigned __x) 788c206366fSHoward Hinnant{ 789c206366fSHoward Hinnant return static_cast<unsigned>(__builtin_ctz(__x)); 790c206366fSHoward Hinnant} 791c206366fSHoward Hinnant 792c206366fSHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 793c206366fSHoward Hinnantunsigned long 794c206366fSHoward Hinnant__ctz(unsigned long __x) 795c206366fSHoward Hinnant{ 796c206366fSHoward Hinnant return static_cast<unsigned long>(__builtin_ctzl(__x)); 797c206366fSHoward Hinnant} 798c206366fSHoward Hinnant 799c206366fSHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 800c206366fSHoward Hinnantunsigned long long 801c206366fSHoward Hinnant__ctz(unsigned long long __x) 802c206366fSHoward Hinnant{ 803c206366fSHoward Hinnant return static_cast<unsigned long long>(__builtin_ctzll(__x)); 804c206366fSHoward Hinnant} 805c8edcb36SHoward Hinnant 806c8edcb36SHoward Hinnant// Precondition: __x != 0 807c206366fSHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 808c206366fSHoward Hinnantunsigned 809c206366fSHoward Hinnant__clz(unsigned __x) 810c206366fSHoward Hinnant{ 811c206366fSHoward Hinnant return static_cast<unsigned>(__builtin_clz(__x)); 812c206366fSHoward Hinnant} 813c206366fSHoward Hinnant 814c206366fSHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 815c206366fSHoward Hinnantunsigned long 816c206366fSHoward Hinnant__clz(unsigned long __x) 817c206366fSHoward Hinnant{ 818c206366fSHoward Hinnant return static_cast<unsigned long>(__builtin_clzl (__x)); 819c206366fSHoward Hinnant} 820c206366fSHoward Hinnant 821c206366fSHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 822c206366fSHoward Hinnantunsigned long long 823c206366fSHoward Hinnant__clz(unsigned long long __x) 824c206366fSHoward Hinnant{ 825c206366fSHoward Hinnant return static_cast<unsigned long long>(__builtin_clzll(__x)); 826c206366fSHoward Hinnant} 827c8edcb36SHoward Hinnant 828c8edcb36SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY int __pop_count(unsigned __x) {return __builtin_popcount (__x);} 829c8edcb36SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY int __pop_count(unsigned long __x) {return __builtin_popcountl (__x);} 830c8edcb36SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY int __pop_count(unsigned long long __x) {return __builtin_popcountll(__x);} 831c8edcb36SHoward Hinnant 8323e519524SHoward Hinnant// all_of 8333e519524SHoward Hinnant 8343e519524SHoward Hinnanttemplate <class _InputIterator, class _Predicate> 8353e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 8363e519524SHoward Hinnantbool 8373e519524SHoward Hinnantall_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) 8383e519524SHoward Hinnant{ 8393e519524SHoward Hinnant for (; __first != __last; ++__first) 8403e519524SHoward Hinnant if (!__pred(*__first)) 8413e519524SHoward Hinnant return false; 8423e519524SHoward Hinnant return true; 8433e519524SHoward Hinnant} 8443e519524SHoward Hinnant 8453e519524SHoward Hinnant// any_of 8463e519524SHoward Hinnant 8473e519524SHoward Hinnanttemplate <class _InputIterator, class _Predicate> 8483e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 8493e519524SHoward Hinnantbool 8503e519524SHoward Hinnantany_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) 8513e519524SHoward Hinnant{ 8523e519524SHoward Hinnant for (; __first != __last; ++__first) 8533e519524SHoward Hinnant if (__pred(*__first)) 8543e519524SHoward Hinnant return true; 8553e519524SHoward Hinnant return false; 8563e519524SHoward Hinnant} 8573e519524SHoward Hinnant 8583e519524SHoward Hinnant// none_of 8593e519524SHoward Hinnant 8603e519524SHoward Hinnanttemplate <class _InputIterator, class _Predicate> 8613e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 8623e519524SHoward Hinnantbool 8633e519524SHoward Hinnantnone_of(_InputIterator __first, _InputIterator __last, _Predicate __pred) 8643e519524SHoward Hinnant{ 8653e519524SHoward Hinnant for (; __first != __last; ++__first) 8663e519524SHoward Hinnant if (__pred(*__first)) 8673e519524SHoward Hinnant return false; 8683e519524SHoward Hinnant return true; 8693e519524SHoward Hinnant} 8703e519524SHoward Hinnant 8713e519524SHoward Hinnant// for_each 8723e519524SHoward Hinnant 8733e519524SHoward Hinnanttemplate <class _InputIterator, class _Function> 8743e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 8753e519524SHoward Hinnant_Function 8763e519524SHoward Hinnantfor_each(_InputIterator __first, _InputIterator __last, _Function __f) 8773e519524SHoward Hinnant{ 8783e519524SHoward Hinnant for (; __first != __last; ++__first) 8793e519524SHoward Hinnant __f(*__first); 8801c7fe126SMarshall Clow return __f; 8813e519524SHoward Hinnant} 8823e519524SHoward Hinnant 8833e519524SHoward Hinnant// find 8843e519524SHoward Hinnant 8853e519524SHoward Hinnanttemplate <class _InputIterator, class _Tp> 8863e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 8873e519524SHoward Hinnant_InputIterator 888e4383379SHoward Hinnantfind(_InputIterator __first, _InputIterator __last, const _Tp& __value_) 8893e519524SHoward Hinnant{ 8903e519524SHoward Hinnant for (; __first != __last; ++__first) 891e4383379SHoward Hinnant if (*__first == __value_) 8923e519524SHoward Hinnant break; 8933e519524SHoward Hinnant return __first; 8943e519524SHoward Hinnant} 8953e519524SHoward Hinnant 8963e519524SHoward Hinnant// find_if 8973e519524SHoward Hinnant 8983e519524SHoward Hinnanttemplate <class _InputIterator, class _Predicate> 8993e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 9003e519524SHoward Hinnant_InputIterator 9013e519524SHoward Hinnantfind_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) 9023e519524SHoward Hinnant{ 9033e519524SHoward Hinnant for (; __first != __last; ++__first) 9043e519524SHoward Hinnant if (__pred(*__first)) 9053e519524SHoward Hinnant break; 9063e519524SHoward Hinnant return __first; 9073e519524SHoward Hinnant} 9083e519524SHoward Hinnant 9093e519524SHoward Hinnant// find_if_not 9103e519524SHoward Hinnant 9113e519524SHoward Hinnanttemplate<class _InputIterator, class _Predicate> 9123e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 9133e519524SHoward Hinnant_InputIterator 9143e519524SHoward Hinnantfind_if_not(_InputIterator __first, _InputIterator __last, _Predicate __pred) 9153e519524SHoward Hinnant{ 9163e519524SHoward Hinnant for (; __first != __last; ++__first) 9173e519524SHoward Hinnant if (!__pred(*__first)) 9183e519524SHoward Hinnant break; 9193e519524SHoward Hinnant return __first; 9203e519524SHoward Hinnant} 9213e519524SHoward Hinnant 9223e519524SHoward Hinnant// find_end 9233e519524SHoward Hinnant 9243e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _ForwardIterator1, class _ForwardIterator2> 9253e519524SHoward Hinnant_ForwardIterator1 9263e519524SHoward Hinnant__find_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 9273e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred, 9283e519524SHoward Hinnant forward_iterator_tag, forward_iterator_tag) 9293e519524SHoward Hinnant{ 9303e519524SHoward Hinnant // modeled after search algorithm 9313e519524SHoward Hinnant _ForwardIterator1 __r = __last1; // __last1 is the "default" answer 9323e519524SHoward Hinnant if (__first2 == __last2) 9333e519524SHoward Hinnant return __r; 9343e519524SHoward Hinnant while (true) 9353e519524SHoward Hinnant { 9363e519524SHoward Hinnant while (true) 9373e519524SHoward Hinnant { 9383e519524SHoward Hinnant if (__first1 == __last1) // if source exhausted return last correct answer 9393e519524SHoward Hinnant return __r; // (or __last1 if never found) 9403e519524SHoward Hinnant if (__pred(*__first1, *__first2)) 9413e519524SHoward Hinnant break; 9423e519524SHoward Hinnant ++__first1; 9433e519524SHoward Hinnant } 9443e519524SHoward Hinnant // *__first1 matches *__first2, now match elements after here 9453e519524SHoward Hinnant _ForwardIterator1 __m1 = __first1; 9463e519524SHoward Hinnant _ForwardIterator2 __m2 = __first2; 9473e519524SHoward Hinnant while (true) 9483e519524SHoward Hinnant { 9493e519524SHoward Hinnant if (++__m2 == __last2) 9503e519524SHoward Hinnant { // Pattern exhaused, record answer and search for another one 9513e519524SHoward Hinnant __r = __first1; 9523e519524SHoward Hinnant ++__first1; 9533e519524SHoward Hinnant break; 9543e519524SHoward Hinnant } 9553e519524SHoward Hinnant if (++__m1 == __last1) // Source exhausted, return last answer 9563e519524SHoward Hinnant return __r; 9573e519524SHoward Hinnant if (!__pred(*__m1, *__m2)) // mismatch, restart with a new __first 9583e519524SHoward Hinnant { 9593e519524SHoward Hinnant ++__first1; 9603e519524SHoward Hinnant break; 9613e519524SHoward Hinnant } // else there is a match, check next elements 9623e519524SHoward Hinnant } 9633e519524SHoward Hinnant } 9643e519524SHoward Hinnant} 9653e519524SHoward Hinnant 9663e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _BidirectionalIterator1, class _BidirectionalIterator2> 9673e519524SHoward Hinnant_BidirectionalIterator1 9683e519524SHoward Hinnant__find_end(_BidirectionalIterator1 __first1, _BidirectionalIterator1 __last1, 9693e519524SHoward Hinnant _BidirectionalIterator2 __first2, _BidirectionalIterator2 __last2, _BinaryPredicate __pred, 9703e519524SHoward Hinnant bidirectional_iterator_tag, bidirectional_iterator_tag) 9713e519524SHoward Hinnant{ 9723e519524SHoward Hinnant // modeled after search algorithm (in reverse) 9733e519524SHoward Hinnant if (__first2 == __last2) 9743e519524SHoward Hinnant return __last1; // Everything matches an empty sequence 9753e519524SHoward Hinnant _BidirectionalIterator1 __l1 = __last1; 9763e519524SHoward Hinnant _BidirectionalIterator2 __l2 = __last2; 9773e519524SHoward Hinnant --__l2; 9783e519524SHoward Hinnant while (true) 9793e519524SHoward Hinnant { 9803e519524SHoward Hinnant // Find last element in sequence 1 that matchs *(__last2-1), with a mininum of loop checks 9813e519524SHoward Hinnant while (true) 9823e519524SHoward Hinnant { 9833e519524SHoward Hinnant if (__first1 == __l1) // return __last1 if no element matches *__first2 9843e519524SHoward Hinnant return __last1; 9853e519524SHoward Hinnant if (__pred(*--__l1, *__l2)) 9863e519524SHoward Hinnant break; 9873e519524SHoward Hinnant } 9883e519524SHoward Hinnant // *__l1 matches *__l2, now match elements before here 9893e519524SHoward Hinnant _BidirectionalIterator1 __m1 = __l1; 9903e519524SHoward Hinnant _BidirectionalIterator2 __m2 = __l2; 9913e519524SHoward Hinnant while (true) 9923e519524SHoward Hinnant { 9933e519524SHoward Hinnant if (__m2 == __first2) // If pattern exhausted, __m1 is the answer (works for 1 element pattern) 9943e519524SHoward Hinnant return __m1; 9953e519524SHoward Hinnant if (__m1 == __first1) // Otherwise if source exhaused, pattern not found 9963e519524SHoward Hinnant return __last1; 9973e519524SHoward Hinnant if (!__pred(*--__m1, *--__m2)) // if there is a mismatch, restart with a new __l1 9983e519524SHoward Hinnant { 9993e519524SHoward Hinnant break; 10003e519524SHoward Hinnant } // else there is a match, check next elements 10013e519524SHoward Hinnant } 10023e519524SHoward Hinnant } 10033e519524SHoward Hinnant} 10043e519524SHoward Hinnant 10053e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 10069b0af34dSMarshall Clow_LIBCPP_CONSTEXPR_AFTER_CXX11 _RandomAccessIterator1 10073e519524SHoward Hinnant__find_end(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 10083e519524SHoward Hinnant _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, 10093e519524SHoward Hinnant random_access_iterator_tag, random_access_iterator_tag) 10103e519524SHoward Hinnant{ 10113e519524SHoward Hinnant // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern 10123e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator2>::difference_type __len2 = __last2 - __first2; 10133e519524SHoward Hinnant if (__len2 == 0) 10143e519524SHoward Hinnant return __last1; 10153e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator1>::difference_type __len1 = __last1 - __first1; 10163e519524SHoward Hinnant if (__len1 < __len2) 10173e519524SHoward Hinnant return __last1; 10183e519524SHoward Hinnant const _RandomAccessIterator1 __s = __first1 + (__len2 - 1); // End of pattern match can't go before here 10193e519524SHoward Hinnant _RandomAccessIterator1 __l1 = __last1; 10203e519524SHoward Hinnant _RandomAccessIterator2 __l2 = __last2; 10213e519524SHoward Hinnant --__l2; 10223e519524SHoward Hinnant while (true) 10233e519524SHoward Hinnant { 10243e519524SHoward Hinnant while (true) 10253e519524SHoward Hinnant { 10263e519524SHoward Hinnant if (__s == __l1) 10273e519524SHoward Hinnant return __last1; 10283e519524SHoward Hinnant if (__pred(*--__l1, *__l2)) 10293e519524SHoward Hinnant break; 10303e519524SHoward Hinnant } 10313e519524SHoward Hinnant _RandomAccessIterator1 __m1 = __l1; 10323e519524SHoward Hinnant _RandomAccessIterator2 __m2 = __l2; 10333e519524SHoward Hinnant while (true) 10343e519524SHoward Hinnant { 10353e519524SHoward Hinnant if (__m2 == __first2) 10363e519524SHoward Hinnant return __m1; 10373e519524SHoward Hinnant // no need to check range on __m1 because __s guarantees we have enough source 10383e519524SHoward Hinnant if (!__pred(*--__m1, *--__m2)) 10393e519524SHoward Hinnant { 10403e519524SHoward Hinnant break; 10413e519524SHoward Hinnant } 10423e519524SHoward Hinnant } 10433e519524SHoward Hinnant } 10443e519524SHoward Hinnant} 10453e519524SHoward Hinnant 10463e519524SHoward Hinnanttemplate <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 10473e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 10483e519524SHoward Hinnant_ForwardIterator1 10493e519524SHoward Hinnantfind_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 10503e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 10513e519524SHoward Hinnant{ 1052ce48a113SHoward Hinnant return _VSTD::__find_end<typename add_lvalue_reference<_BinaryPredicate>::type> 10533e519524SHoward Hinnant (__first1, __last1, __first2, __last2, __pred, 10543e519524SHoward Hinnant typename iterator_traits<_ForwardIterator1>::iterator_category(), 10553e519524SHoward Hinnant typename iterator_traits<_ForwardIterator2>::iterator_category()); 10563e519524SHoward Hinnant} 10573e519524SHoward Hinnant 10583e519524SHoward Hinnanttemplate <class _ForwardIterator1, class _ForwardIterator2> 10593e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 10603e519524SHoward Hinnant_ForwardIterator1 10613e519524SHoward Hinnantfind_end(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 10623e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2) 10633e519524SHoward Hinnant{ 10643e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 10653e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 1066ce48a113SHoward Hinnant return _VSTD::find_end(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 10673e519524SHoward Hinnant} 10683e519524SHoward Hinnant 10693e519524SHoward Hinnant// find_first_of 10703e519524SHoward Hinnant 10713e519524SHoward Hinnanttemplate <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 10729b0af34dSMarshall Clow_LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator1 10739b0af34dSMarshall Clow__find_first_of_ce(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 10743e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 10753e519524SHoward Hinnant{ 10763e519524SHoward Hinnant for (; __first1 != __last1; ++__first1) 10773e519524SHoward Hinnant for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) 10783e519524SHoward Hinnant if (__pred(*__first1, *__j)) 10793e519524SHoward Hinnant return __first1; 10803e519524SHoward Hinnant return __last1; 10813e519524SHoward Hinnant} 10823e519524SHoward Hinnant 10839b0af34dSMarshall Clow 10849b0af34dSMarshall Clowtemplate <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 10859b0af34dSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 10869b0af34dSMarshall Clow_ForwardIterator1 10879b0af34dSMarshall Clowfind_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 10889b0af34dSMarshall Clow _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 10899b0af34dSMarshall Clow{ 10909b0af34dSMarshall Clow return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __pred); 10919b0af34dSMarshall Clow} 10929b0af34dSMarshall Clow 10933e519524SHoward Hinnanttemplate <class _ForwardIterator1, class _ForwardIterator2> 10943e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 10953e519524SHoward Hinnant_ForwardIterator1 10963e519524SHoward Hinnantfind_first_of(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 10973e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2) 10983e519524SHoward Hinnant{ 10993e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 11003e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 11019b0af34dSMarshall Clow return _VSTD::__find_first_of_ce(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 11023e519524SHoward Hinnant} 11033e519524SHoward Hinnant 11043e519524SHoward Hinnant// adjacent_find 11053e519524SHoward Hinnant 11063e519524SHoward Hinnanttemplate <class _ForwardIterator, class _BinaryPredicate> 11073e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 11083e519524SHoward Hinnant_ForwardIterator 11093e519524SHoward Hinnantadjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) 11103e519524SHoward Hinnant{ 11113e519524SHoward Hinnant if (__first != __last) 11123e519524SHoward Hinnant { 11133e519524SHoward Hinnant _ForwardIterator __i = __first; 11143e519524SHoward Hinnant while (++__i != __last) 11153e519524SHoward Hinnant { 11163e519524SHoward Hinnant if (__pred(*__first, *__i)) 11173e519524SHoward Hinnant return __first; 11183e519524SHoward Hinnant __first = __i; 11193e519524SHoward Hinnant } 11203e519524SHoward Hinnant } 11213e519524SHoward Hinnant return __last; 11223e519524SHoward Hinnant} 11233e519524SHoward Hinnant 11243e519524SHoward Hinnanttemplate <class _ForwardIterator> 11253e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 11263e519524SHoward Hinnant_ForwardIterator 11273e519524SHoward Hinnantadjacent_find(_ForwardIterator __first, _ForwardIterator __last) 11283e519524SHoward Hinnant{ 11293e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::value_type __v; 1130ce48a113SHoward Hinnant return _VSTD::adjacent_find(__first, __last, __equal_to<__v>()); 11313e519524SHoward Hinnant} 11323e519524SHoward Hinnant 11333e519524SHoward Hinnant// count 11343e519524SHoward Hinnant 11353e519524SHoward Hinnanttemplate <class _InputIterator, class _Tp> 11363e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 11373e519524SHoward Hinnanttypename iterator_traits<_InputIterator>::difference_type 1138e4383379SHoward Hinnantcount(_InputIterator __first, _InputIterator __last, const _Tp& __value_) 11393e519524SHoward Hinnant{ 11403e519524SHoward Hinnant typename iterator_traits<_InputIterator>::difference_type __r(0); 11413e519524SHoward Hinnant for (; __first != __last; ++__first) 1142e4383379SHoward Hinnant if (*__first == __value_) 11433e519524SHoward Hinnant ++__r; 11443e519524SHoward Hinnant return __r; 11453e519524SHoward Hinnant} 11463e519524SHoward Hinnant 11473e519524SHoward Hinnant// count_if 11483e519524SHoward Hinnant 11493e519524SHoward Hinnanttemplate <class _InputIterator, class _Predicate> 11503e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 11513e519524SHoward Hinnanttypename iterator_traits<_InputIterator>::difference_type 11523e519524SHoward Hinnantcount_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) 11533e519524SHoward Hinnant{ 11543e519524SHoward Hinnant typename iterator_traits<_InputIterator>::difference_type __r(0); 11553e519524SHoward Hinnant for (; __first != __last; ++__first) 11563e519524SHoward Hinnant if (__pred(*__first)) 11573e519524SHoward Hinnant ++__r; 11583e519524SHoward Hinnant return __r; 11593e519524SHoward Hinnant} 11603e519524SHoward Hinnant 11613e519524SHoward Hinnant// mismatch 11623e519524SHoward Hinnant 11633e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 11643e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 11653e519524SHoward Hinnantpair<_InputIterator1, _InputIterator2> 11663e519524SHoward Hinnantmismatch(_InputIterator1 __first1, _InputIterator1 __last1, 11673e519524SHoward Hinnant _InputIterator2 __first2, _BinaryPredicate __pred) 11683e519524SHoward Hinnant{ 1169bd7c7b55SMarshall Clow for (; __first1 != __last1; ++__first1, (void) ++__first2) 11703e519524SHoward Hinnant if (!__pred(*__first1, *__first2)) 11713e519524SHoward Hinnant break; 11723e519524SHoward Hinnant return pair<_InputIterator1, _InputIterator2>(__first1, __first2); 11733e519524SHoward Hinnant} 11743e519524SHoward Hinnant 11753e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2> 11763e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 11773e519524SHoward Hinnantpair<_InputIterator1, _InputIterator2> 11783e519524SHoward Hinnantmismatch(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) 11793e519524SHoward Hinnant{ 11803e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator1>::value_type __v1; 11813e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator2>::value_type __v2; 1182ce48a113SHoward Hinnant return _VSTD::mismatch(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 11833e519524SHoward Hinnant} 11843e519524SHoward Hinnant 11850b0bbd2fSMarshall Clow#if _LIBCPP_STD_VER > 11 11860b0bbd2fSMarshall Clowtemplate <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 11870b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 11880b0bbd2fSMarshall Clowpair<_InputIterator1, _InputIterator2> 11890b0bbd2fSMarshall Clowmismatch(_InputIterator1 __first1, _InputIterator1 __last1, 11900b0bbd2fSMarshall Clow _InputIterator2 __first2, _InputIterator2 __last2, 11910b0bbd2fSMarshall Clow _BinaryPredicate __pred) 11920b0bbd2fSMarshall Clow{ 1193bd7c7b55SMarshall Clow for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) 11940b0bbd2fSMarshall Clow if (!__pred(*__first1, *__first2)) 11950b0bbd2fSMarshall Clow break; 11960b0bbd2fSMarshall Clow return pair<_InputIterator1, _InputIterator2>(__first1, __first2); 11970b0bbd2fSMarshall Clow} 11980b0bbd2fSMarshall Clow 11990b0bbd2fSMarshall Clowtemplate <class _InputIterator1, class _InputIterator2> 12000b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 12010b0bbd2fSMarshall Clowpair<_InputIterator1, _InputIterator2> 12020b0bbd2fSMarshall Clowmismatch(_InputIterator1 __first1, _InputIterator1 __last1, 12030b0bbd2fSMarshall Clow _InputIterator2 __first2, _InputIterator2 __last2) 12040b0bbd2fSMarshall Clow{ 12050b0bbd2fSMarshall Clow typedef typename iterator_traits<_InputIterator1>::value_type __v1; 12060b0bbd2fSMarshall Clow typedef typename iterator_traits<_InputIterator2>::value_type __v2; 12070b0bbd2fSMarshall Clow return _VSTD::mismatch(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 12080b0bbd2fSMarshall Clow} 12090b0bbd2fSMarshall Clow#endif 12100b0bbd2fSMarshall Clow 12113e519524SHoward Hinnant// equal 12123e519524SHoward Hinnant 12133e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 12143e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 12153e519524SHoward Hinnantbool 12163e519524SHoward Hinnantequal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) 12173e519524SHoward Hinnant{ 1218910285b2SEric Fiselier for (; __first1 != __last1; ++__first1, (void) ++__first2) 12193e519524SHoward Hinnant if (!__pred(*__first1, *__first2)) 12203e519524SHoward Hinnant return false; 12213e519524SHoward Hinnant return true; 12223e519524SHoward Hinnant} 12233e519524SHoward Hinnant 12243e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2> 12253e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 12263e519524SHoward Hinnantbool 12273e519524SHoward Hinnantequal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) 12283e519524SHoward Hinnant{ 12293e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator1>::value_type __v1; 12303e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator2>::value_type __v2; 1231ce48a113SHoward Hinnant return _VSTD::equal(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 12323e519524SHoward Hinnant} 12333e519524SHoward Hinnant 12340b0bbd2fSMarshall Clow#if _LIBCPP_STD_VER > 11 12350b0bbd2fSMarshall Clowtemplate <class _BinaryPredicate, class _InputIterator1, class _InputIterator2> 12360b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 12370b0bbd2fSMarshall Clowbool 12380b0bbd2fSMarshall Clow__equal(_InputIterator1 __first1, _InputIterator1 __last1, 12390b0bbd2fSMarshall Clow _InputIterator2 __first2, _InputIterator2 __last2, _BinaryPredicate __pred, 12400b0bbd2fSMarshall Clow input_iterator_tag, input_iterator_tag ) 12410b0bbd2fSMarshall Clow{ 1242910285b2SEric Fiselier for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) 12430b0bbd2fSMarshall Clow if (!__pred(*__first1, *__first2)) 12440b0bbd2fSMarshall Clow return false; 12450b0bbd2fSMarshall Clow return __first1 == __last1 && __first2 == __last2; 12460b0bbd2fSMarshall Clow} 12470b0bbd2fSMarshall Clow 12480b0bbd2fSMarshall Clowtemplate <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 12490b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 12500b0bbd2fSMarshall Clowbool 12510b0bbd2fSMarshall Clow__equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 12520b0bbd2fSMarshall Clow _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, 12530b0bbd2fSMarshall Clow random_access_iterator_tag, random_access_iterator_tag ) 12540b0bbd2fSMarshall Clow{ 12550b0bbd2fSMarshall Clow if ( _VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 12560b0bbd2fSMarshall Clow return false; 12570b0bbd2fSMarshall Clow return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, 12580b0bbd2fSMarshall Clow typename add_lvalue_reference<_BinaryPredicate>::type> 12590b0bbd2fSMarshall Clow (__first1, __last1, __first2, __pred ); 12600b0bbd2fSMarshall Clow} 12610b0bbd2fSMarshall Clow 12620b0bbd2fSMarshall Clowtemplate <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 12630b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 12640b0bbd2fSMarshall Clowbool 12650b0bbd2fSMarshall Clowequal(_InputIterator1 __first1, _InputIterator1 __last1, 12660b0bbd2fSMarshall Clow _InputIterator2 __first2, _InputIterator2 __last2, _BinaryPredicate __pred ) 12670b0bbd2fSMarshall Clow{ 12680b0bbd2fSMarshall Clow return _VSTD::__equal<typename add_lvalue_reference<_BinaryPredicate>::type> 12690b0bbd2fSMarshall Clow (__first1, __last1, __first2, __last2, __pred, 12700b0bbd2fSMarshall Clow typename iterator_traits<_InputIterator1>::iterator_category(), 12710b0bbd2fSMarshall Clow typename iterator_traits<_InputIterator2>::iterator_category()); 12720b0bbd2fSMarshall Clow} 12730b0bbd2fSMarshall Clow 12740b0bbd2fSMarshall Clowtemplate <class _InputIterator1, class _InputIterator2> 12750b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 12760b0bbd2fSMarshall Clowbool 12770b0bbd2fSMarshall Clowequal(_InputIterator1 __first1, _InputIterator1 __last1, 12780b0bbd2fSMarshall Clow _InputIterator2 __first2, _InputIterator2 __last2) 12790b0bbd2fSMarshall Clow{ 12800b0bbd2fSMarshall Clow typedef typename iterator_traits<_InputIterator1>::value_type __v1; 12810b0bbd2fSMarshall Clow typedef typename iterator_traits<_InputIterator2>::value_type __v2; 12820b0bbd2fSMarshall Clow return _VSTD::__equal(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), 12830b0bbd2fSMarshall Clow typename iterator_traits<_InputIterator1>::iterator_category(), 12840b0bbd2fSMarshall Clow typename iterator_traits<_InputIterator2>::iterator_category()); 12850b0bbd2fSMarshall Clow} 12860b0bbd2fSMarshall Clow#endif 12870b0bbd2fSMarshall Clow 12883e519524SHoward Hinnant// is_permutation 12893e519524SHoward Hinnant 12903e519524SHoward Hinnanttemplate<class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 12913e519524SHoward Hinnantbool 12923e519524SHoward Hinnantis_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 12933e519524SHoward Hinnant _ForwardIterator2 __first2, _BinaryPredicate __pred) 12943e519524SHoward Hinnant{ 12953e519524SHoward Hinnant // shorten sequences as much as possible by lopping of any equal parts 1296910285b2SEric Fiselier for (; __first1 != __last1; ++__first1, (void) ++__first2) 12973e519524SHoward Hinnant if (!__pred(*__first1, *__first2)) 12983e519524SHoward Hinnant goto __not_done; 12993e519524SHoward Hinnant return true; 13003e519524SHoward Hinnant__not_done: 13013e519524SHoward Hinnant // __first1 != __last1 && *__first1 != *__first2 13023e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; 1303ce48a113SHoward Hinnant _D1 __l1 = _VSTD::distance(__first1, __last1); 13043e519524SHoward Hinnant if (__l1 == _D1(1)) 13053e519524SHoward Hinnant return false; 1306ce48a113SHoward Hinnant _ForwardIterator2 __last2 = _VSTD::next(__first2, __l1); 13073e519524SHoward Hinnant // For each element in [f1, l1) see if there are the same number of 13083e519524SHoward Hinnant // equal elements in [f2, l2) 13093e519524SHoward Hinnant for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) 13103e519524SHoward Hinnant { 13113e519524SHoward Hinnant // Have we already counted the number of *__i in [f1, l1)? 13123e519524SHoward Hinnant for (_ForwardIterator1 __j = __first1; __j != __i; ++__j) 13133e519524SHoward Hinnant if (__pred(*__j, *__i)) 13143e519524SHoward Hinnant goto __next_iter; 13153e519524SHoward Hinnant { 13163e519524SHoward Hinnant // Count number of *__i in [f2, l2) 13173e519524SHoward Hinnant _D1 __c2 = 0; 13183e519524SHoward Hinnant for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) 13193e519524SHoward Hinnant if (__pred(*__i, *__j)) 13203e519524SHoward Hinnant ++__c2; 13213e519524SHoward Hinnant if (__c2 == 0) 13223e519524SHoward Hinnant return false; 13233e519524SHoward Hinnant // Count number of *__i in [__i, l1) (we can start with 1) 13243e519524SHoward Hinnant _D1 __c1 = 1; 1325ce48a113SHoward Hinnant for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) 13263e519524SHoward Hinnant if (__pred(*__i, *__j)) 13273e519524SHoward Hinnant ++__c1; 13283e519524SHoward Hinnant if (__c1 != __c2) 13293e519524SHoward Hinnant return false; 13303e519524SHoward Hinnant } 13313e519524SHoward Hinnant__next_iter:; 13323e519524SHoward Hinnant } 13333e519524SHoward Hinnant return true; 13343e519524SHoward Hinnant} 13353e519524SHoward Hinnant 13363e519524SHoward Hinnanttemplate<class _ForwardIterator1, class _ForwardIterator2> 13373e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 13383e519524SHoward Hinnantbool 13393e519524SHoward Hinnantis_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 13403e519524SHoward Hinnant _ForwardIterator2 __first2) 13413e519524SHoward Hinnant{ 13423e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 13433e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 1344ce48a113SHoward Hinnant return _VSTD::is_permutation(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 13453e519524SHoward Hinnant} 13463e519524SHoward Hinnant 13470b0bbd2fSMarshall Clow#if _LIBCPP_STD_VER > 11 13480b0bbd2fSMarshall Clowtemplate<class _BinaryPredicate, class _ForwardIterator1, class _ForwardIterator2> 13490b0bbd2fSMarshall Clowbool 13500b0bbd2fSMarshall Clow__is_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 13510b0bbd2fSMarshall Clow _ForwardIterator2 __first2, _ForwardIterator2 __last2, 13520b0bbd2fSMarshall Clow _BinaryPredicate __pred, 13530b0bbd2fSMarshall Clow forward_iterator_tag, forward_iterator_tag ) 13540b0bbd2fSMarshall Clow{ 13550b0bbd2fSMarshall Clow // shorten sequences as much as possible by lopping of any equal parts 1356847ee131SEric Fiselier for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void) ++__first2) 13570b0bbd2fSMarshall Clow if (!__pred(*__first1, *__first2)) 13580b0bbd2fSMarshall Clow goto __not_done; 13590b0bbd2fSMarshall Clow return __first1 == __last1 && __first2 == __last2; 13600b0bbd2fSMarshall Clow__not_done: 13610b0bbd2fSMarshall Clow // __first1 != __last1 && __first2 != __last2 && *__first1 != *__first2 13620b0bbd2fSMarshall Clow typedef typename iterator_traits<_ForwardIterator1>::difference_type _D1; 13630b0bbd2fSMarshall Clow _D1 __l1 = _VSTD::distance(__first1, __last1); 13640b0bbd2fSMarshall Clow 13650b0bbd2fSMarshall Clow typedef typename iterator_traits<_ForwardIterator2>::difference_type _D2; 1366fce85ba4SMarshall Clow _D2 __l2 = _VSTD::distance(__first2, __last2); 13670b0bbd2fSMarshall Clow if (__l1 != __l2) 13680b0bbd2fSMarshall Clow return false; 13690b0bbd2fSMarshall Clow 13700b0bbd2fSMarshall Clow // For each element in [f1, l1) see if there are the same number of 13710b0bbd2fSMarshall Clow // equal elements in [f2, l2) 13720b0bbd2fSMarshall Clow for (_ForwardIterator1 __i = __first1; __i != __last1; ++__i) 13730b0bbd2fSMarshall Clow { 13740b0bbd2fSMarshall Clow // Have we already counted the number of *__i in [f1, l1)? 13750b0bbd2fSMarshall Clow for (_ForwardIterator1 __j = __first1; __j != __i; ++__j) 13760b0bbd2fSMarshall Clow if (__pred(*__j, *__i)) 13770b0bbd2fSMarshall Clow goto __next_iter; 13780b0bbd2fSMarshall Clow { 13790b0bbd2fSMarshall Clow // Count number of *__i in [f2, l2) 13800b0bbd2fSMarshall Clow _D1 __c2 = 0; 13810b0bbd2fSMarshall Clow for (_ForwardIterator2 __j = __first2; __j != __last2; ++__j) 13820b0bbd2fSMarshall Clow if (__pred(*__i, *__j)) 13830b0bbd2fSMarshall Clow ++__c2; 13840b0bbd2fSMarshall Clow if (__c2 == 0) 13850b0bbd2fSMarshall Clow return false; 13860b0bbd2fSMarshall Clow // Count number of *__i in [__i, l1) (we can start with 1) 13870b0bbd2fSMarshall Clow _D1 __c1 = 1; 13880b0bbd2fSMarshall Clow for (_ForwardIterator1 __j = _VSTD::next(__i); __j != __last1; ++__j) 13890b0bbd2fSMarshall Clow if (__pred(*__i, *__j)) 13900b0bbd2fSMarshall Clow ++__c1; 13910b0bbd2fSMarshall Clow if (__c1 != __c2) 13920b0bbd2fSMarshall Clow return false; 13930b0bbd2fSMarshall Clow } 13940b0bbd2fSMarshall Clow__next_iter:; 13950b0bbd2fSMarshall Clow } 13960b0bbd2fSMarshall Clow return true; 13970b0bbd2fSMarshall Clow} 13980b0bbd2fSMarshall Clow 13990b0bbd2fSMarshall Clowtemplate<class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 14000b0bbd2fSMarshall Clowbool 14010b0bbd2fSMarshall Clow__is_permutation(_RandomAccessIterator1 __first1, _RandomAccessIterator2 __last1, 14020b0bbd2fSMarshall Clow _RandomAccessIterator1 __first2, _RandomAccessIterator2 __last2, 14030b0bbd2fSMarshall Clow _BinaryPredicate __pred, 14040b0bbd2fSMarshall Clow random_access_iterator_tag, random_access_iterator_tag ) 14050b0bbd2fSMarshall Clow{ 14060b0bbd2fSMarshall Clow if ( _VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 14070b0bbd2fSMarshall Clow return false; 14080b0bbd2fSMarshall Clow return _VSTD::is_permutation<_RandomAccessIterator1, _RandomAccessIterator2, 14090b0bbd2fSMarshall Clow typename add_lvalue_reference<_BinaryPredicate>::type> 14100b0bbd2fSMarshall Clow (__first1, __last1, __first2, __pred ); 14110b0bbd2fSMarshall Clow} 14120b0bbd2fSMarshall Clow 14130b0bbd2fSMarshall Clowtemplate<class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 14140b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 14150b0bbd2fSMarshall Clowbool 14160b0bbd2fSMarshall Clowis_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 14170b0bbd2fSMarshall Clow _ForwardIterator2 __first2, _ForwardIterator2 __last2, 14180b0bbd2fSMarshall Clow _BinaryPredicate __pred ) 14190b0bbd2fSMarshall Clow{ 14200b0bbd2fSMarshall Clow return _VSTD::__is_permutation<typename add_lvalue_reference<_BinaryPredicate>::type> 14210b0bbd2fSMarshall Clow (__first1, __last1, __first2, __last2, __pred, 14220b0bbd2fSMarshall Clow typename iterator_traits<_ForwardIterator1>::iterator_category(), 14230b0bbd2fSMarshall Clow typename iterator_traits<_ForwardIterator2>::iterator_category()); 14240b0bbd2fSMarshall Clow} 14250b0bbd2fSMarshall Clow 14260b0bbd2fSMarshall Clowtemplate<class _ForwardIterator1, class _ForwardIterator2> 14270b0bbd2fSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY 14280b0bbd2fSMarshall Clowbool 14290b0bbd2fSMarshall Clowis_permutation(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 14300b0bbd2fSMarshall Clow _ForwardIterator2 __first2, _ForwardIterator2 __last2) 14310b0bbd2fSMarshall Clow{ 14320b0bbd2fSMarshall Clow typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 14330b0bbd2fSMarshall Clow typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 14340b0bbd2fSMarshall Clow return _VSTD::__is_permutation(__first1, __last1, __first2, __last2, 14350b0bbd2fSMarshall Clow __equal_to<__v1, __v2>(), 14360b0bbd2fSMarshall Clow typename iterator_traits<_ForwardIterator1>::iterator_category(), 14370b0bbd2fSMarshall Clow typename iterator_traits<_ForwardIterator2>::iterator_category()); 14380b0bbd2fSMarshall Clow} 14390b0bbd2fSMarshall Clow#endif 14400b0bbd2fSMarshall Clow 14413e519524SHoward Hinnant// search 14423e519524SHoward Hinnant 14433e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _ForwardIterator1, class _ForwardIterator2> 144428cc4ddeSMarshall Clowpair<_ForwardIterator1, _ForwardIterator1> 14453e519524SHoward Hinnant__search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 14463e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred, 14473e519524SHoward Hinnant forward_iterator_tag, forward_iterator_tag) 14483e519524SHoward Hinnant{ 14493e519524SHoward Hinnant if (__first2 == __last2) 145028cc4ddeSMarshall Clow return make_pair(__first1, __first1); // Everything matches an empty sequence 14513e519524SHoward Hinnant while (true) 14523e519524SHoward Hinnant { 14533e519524SHoward Hinnant // Find first element in sequence 1 that matchs *__first2, with a mininum of loop checks 14543e519524SHoward Hinnant while (true) 14553e519524SHoward Hinnant { 14563e519524SHoward Hinnant if (__first1 == __last1) // return __last1 if no element matches *__first2 145728cc4ddeSMarshall Clow return make_pair(__last1, __last1); 14583e519524SHoward Hinnant if (__pred(*__first1, *__first2)) 14593e519524SHoward Hinnant break; 14603e519524SHoward Hinnant ++__first1; 14613e519524SHoward Hinnant } 14623e519524SHoward Hinnant // *__first1 matches *__first2, now match elements after here 14633e519524SHoward Hinnant _ForwardIterator1 __m1 = __first1; 14643e519524SHoward Hinnant _ForwardIterator2 __m2 = __first2; 14653e519524SHoward Hinnant while (true) 14663e519524SHoward Hinnant { 14673e519524SHoward Hinnant if (++__m2 == __last2) // If pattern exhausted, __first1 is the answer (works for 1 element pattern) 146828cc4ddeSMarshall Clow return make_pair(__first1, __m1); 14693e519524SHoward Hinnant if (++__m1 == __last1) // Otherwise if source exhaused, pattern not found 147028cc4ddeSMarshall Clow return make_pair(__last1, __last1); 14713e519524SHoward Hinnant if (!__pred(*__m1, *__m2)) // if there is a mismatch, restart with a new __first1 14723e519524SHoward Hinnant { 14733e519524SHoward Hinnant ++__first1; 14743e519524SHoward Hinnant break; 14753e519524SHoward Hinnant } // else there is a match, check next elements 14763e519524SHoward Hinnant } 14773e519524SHoward Hinnant } 14783e519524SHoward Hinnant} 14793e519524SHoward Hinnant 14803e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 148128cc4ddeSMarshall Clow_LIBCPP_CONSTEXPR_AFTER_CXX11 148228cc4ddeSMarshall Clowpair<_RandomAccessIterator1, _RandomAccessIterator1> 14833e519524SHoward Hinnant__search(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 14843e519524SHoward Hinnant _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, 14853e519524SHoward Hinnant random_access_iterator_tag, random_access_iterator_tag) 14863e519524SHoward Hinnant{ 148728cc4ddeSMarshall Clow typedef typename iterator_traits<_RandomAccessIterator1>::difference_type _D1; 148828cc4ddeSMarshall Clow typedef typename iterator_traits<_RandomAccessIterator2>::difference_type _D2; 14893e519524SHoward Hinnant // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern 149028cc4ddeSMarshall Clow const _D2 __len2 = __last2 - __first2; 14913e519524SHoward Hinnant if (__len2 == 0) 149228cc4ddeSMarshall Clow return make_pair(__first1, __first1); 149328cc4ddeSMarshall Clow const _D1 __len1 = __last1 - __first1; 14943e519524SHoward Hinnant if (__len1 < __len2) 149528cc4ddeSMarshall Clow return make_pair(__last1, __last1); 14963e519524SHoward Hinnant const _RandomAccessIterator1 __s = __last1 - (__len2 - 1); // Start of pattern match can't go beyond here 1497b9775795SAditya Kumar 14983e519524SHoward Hinnant while (true) 14993e519524SHoward Hinnant { 15003e519524SHoward Hinnant while (true) 15013e519524SHoward Hinnant { 15023e519524SHoward Hinnant if (__first1 == __s) 150328cc4ddeSMarshall Clow return make_pair(__last1, __last1); 15043e519524SHoward Hinnant if (__pred(*__first1, *__first2)) 15053e519524SHoward Hinnant break; 15063e519524SHoward Hinnant ++__first1; 15073e519524SHoward Hinnant } 1508b9775795SAditya Kumar 15093e519524SHoward Hinnant _RandomAccessIterator1 __m1 = __first1; 15103e519524SHoward Hinnant _RandomAccessIterator2 __m2 = __first2; 15113e519524SHoward Hinnant while (true) 15123e519524SHoward Hinnant { 15133e519524SHoward Hinnant if (++__m2 == __last2) 151428cc4ddeSMarshall Clow return make_pair(__first1, __first1 + __len2); 15153e519524SHoward Hinnant ++__m1; // no need to check range on __m1 because __s guarantees we have enough source 15163e519524SHoward Hinnant if (!__pred(*__m1, *__m2)) 15173e519524SHoward Hinnant { 15183e519524SHoward Hinnant ++__first1; 15193e519524SHoward Hinnant break; 15203e519524SHoward Hinnant } 15213e519524SHoward Hinnant } 15223e519524SHoward Hinnant } 15233e519524SHoward Hinnant} 15243e519524SHoward Hinnant 15253e519524SHoward Hinnanttemplate <class _ForwardIterator1, class _ForwardIterator2, class _BinaryPredicate> 15263e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 15273e519524SHoward Hinnant_ForwardIterator1 15283e519524SHoward Hinnantsearch(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 15293e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred) 15303e519524SHoward Hinnant{ 1531ce48a113SHoward Hinnant return _VSTD::__search<typename add_lvalue_reference<_BinaryPredicate>::type> 15323e519524SHoward Hinnant (__first1, __last1, __first2, __last2, __pred, 153328cc4ddeSMarshall Clow typename iterator_traits<_ForwardIterator1>::iterator_category(), 153428cc4ddeSMarshall Clow typename iterator_traits<_ForwardIterator2>::iterator_category()) 153528cc4ddeSMarshall Clow .first; 15363e519524SHoward Hinnant} 15373e519524SHoward Hinnant 15383e519524SHoward Hinnanttemplate <class _ForwardIterator1, class _ForwardIterator2> 15393e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 15403e519524SHoward Hinnant_ForwardIterator1 15413e519524SHoward Hinnantsearch(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 15423e519524SHoward Hinnant _ForwardIterator2 __first2, _ForwardIterator2 __last2) 15433e519524SHoward Hinnant{ 154428cc4ddeSMarshall Clow typedef typename iterator_traits<_ForwardIterator1>::value_type __v1; 154528cc4ddeSMarshall Clow typedef typename iterator_traits<_ForwardIterator2>::value_type __v2; 1546ce48a113SHoward Hinnant return _VSTD::search(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>()); 15473e519524SHoward Hinnant} 15483e519524SHoward Hinnant 15493e519524SHoward Hinnant// search_n 15503e519524SHoward Hinnant 15513e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _ForwardIterator, class _Size, class _Tp> 15523e519524SHoward Hinnant_ForwardIterator 15533e519524SHoward Hinnant__search_n(_ForwardIterator __first, _ForwardIterator __last, 1554e4383379SHoward Hinnant _Size __count, const _Tp& __value_, _BinaryPredicate __pred, forward_iterator_tag) 15553e519524SHoward Hinnant{ 15563e519524SHoward Hinnant if (__count <= 0) 15573e519524SHoward Hinnant return __first; 15583e519524SHoward Hinnant while (true) 15593e519524SHoward Hinnant { 1560e4383379SHoward Hinnant // Find first element in sequence that matchs __value_, with a mininum of loop checks 15613e519524SHoward Hinnant while (true) 15623e519524SHoward Hinnant { 1563e4383379SHoward Hinnant if (__first == __last) // return __last if no element matches __value_ 15643e519524SHoward Hinnant return __last; 1565e4383379SHoward Hinnant if (__pred(*__first, __value_)) 15663e519524SHoward Hinnant break; 15673e519524SHoward Hinnant ++__first; 15683e519524SHoward Hinnant } 1569e4383379SHoward Hinnant // *__first matches __value_, now match elements after here 15703e519524SHoward Hinnant _ForwardIterator __m = __first; 15713e519524SHoward Hinnant _Size __c(0); 15723e519524SHoward Hinnant while (true) 15733e519524SHoward Hinnant { 15743e519524SHoward Hinnant if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) 15753e519524SHoward Hinnant return __first; 15763e519524SHoward Hinnant if (++__m == __last) // Otherwise if source exhaused, pattern not found 15773e519524SHoward Hinnant return __last; 1578e4383379SHoward Hinnant if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first 15793e519524SHoward Hinnant { 15803e519524SHoward Hinnant __first = __m; 15813e519524SHoward Hinnant ++__first; 15823e519524SHoward Hinnant break; 15833e519524SHoward Hinnant } // else there is a match, check next elements 15843e519524SHoward Hinnant } 15853e519524SHoward Hinnant } 15863e519524SHoward Hinnant} 15873e519524SHoward Hinnant 15883e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _RandomAccessIterator, class _Size, class _Tp> 15893e519524SHoward Hinnant_RandomAccessIterator 15903e519524SHoward Hinnant__search_n(_RandomAccessIterator __first, _RandomAccessIterator __last, 1591e4383379SHoward Hinnant _Size __count, const _Tp& __value_, _BinaryPredicate __pred, random_access_iterator_tag) 15923e519524SHoward Hinnant{ 15933e519524SHoward Hinnant if (__count <= 0) 15943e519524SHoward Hinnant return __first; 15953e519524SHoward Hinnant _Size __len = static_cast<_Size>(__last - __first); 15963e519524SHoward Hinnant if (__len < __count) 15973e519524SHoward Hinnant return __last; 15983e519524SHoward Hinnant const _RandomAccessIterator __s = __last - (__count - 1); // Start of pattern match can't go beyond here 15993e519524SHoward Hinnant while (true) 16003e519524SHoward Hinnant { 1601e4383379SHoward Hinnant // Find first element in sequence that matchs __value_, with a mininum of loop checks 16023e519524SHoward Hinnant while (true) 16033e519524SHoward Hinnant { 1604b13fcad6SHoward Hinnant if (__first >= __s) // return __last if no element matches __value_ 16053e519524SHoward Hinnant return __last; 1606e4383379SHoward Hinnant if (__pred(*__first, __value_)) 16073e519524SHoward Hinnant break; 16083e519524SHoward Hinnant ++__first; 16093e519524SHoward Hinnant } 1610e4383379SHoward Hinnant // *__first matches __value_, now match elements after here 16113e519524SHoward Hinnant _RandomAccessIterator __m = __first; 16123e519524SHoward Hinnant _Size __c(0); 16133e519524SHoward Hinnant while (true) 16143e519524SHoward Hinnant { 16153e519524SHoward Hinnant if (++__c == __count) // If pattern exhausted, __first is the answer (works for 1 element pattern) 16163e519524SHoward Hinnant return __first; 16173e519524SHoward Hinnant ++__m; // no need to check range on __m because __s guarantees we have enough source 1618e4383379SHoward Hinnant if (!__pred(*__m, __value_)) // if there is a mismatch, restart with a new __first 16193e519524SHoward Hinnant { 16203e519524SHoward Hinnant __first = __m; 16213e519524SHoward Hinnant ++__first; 16223e519524SHoward Hinnant break; 16233e519524SHoward Hinnant } // else there is a match, check next elements 16243e519524SHoward Hinnant } 16253e519524SHoward Hinnant } 16263e519524SHoward Hinnant} 16273e519524SHoward Hinnant 16283e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Size, class _Tp, class _BinaryPredicate> 16293e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 16303e519524SHoward Hinnant_ForwardIterator 16313e519524SHoward Hinnantsearch_n(_ForwardIterator __first, _ForwardIterator __last, 1632e4383379SHoward Hinnant _Size __count, const _Tp& __value_, _BinaryPredicate __pred) 16333e519524SHoward Hinnant{ 1634ce48a113SHoward Hinnant return _VSTD::__search_n<typename add_lvalue_reference<_BinaryPredicate>::type> 163551544023SEric Fiselier (__first, __last, __convert_to_integral(__count), __value_, __pred, 163651544023SEric Fiselier typename iterator_traits<_ForwardIterator>::iterator_category()); 16373e519524SHoward Hinnant} 16383e519524SHoward Hinnant 16393e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Size, class _Tp> 16403e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 16413e519524SHoward Hinnant_ForwardIterator 1642e4383379SHoward Hinnantsearch_n(_ForwardIterator __first, _ForwardIterator __last, _Size __count, const _Tp& __value_) 16433e519524SHoward Hinnant{ 16443e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::value_type __v; 164551544023SEric Fiselier return _VSTD::search_n(__first, __last, __convert_to_integral(__count), 164651544023SEric Fiselier __value_, __equal_to<__v, _Tp>()); 16473e519524SHoward Hinnant} 16483e519524SHoward Hinnant 16493e519524SHoward Hinnant// copy 16503e519524SHoward Hinnanttemplate <class _Iter> 16513e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 16523e519524SHoward Hinnant_Iter 16533e519524SHoward Hinnant__unwrap_iter(_Iter __i) 16543e519524SHoward Hinnant{ 16553e519524SHoward Hinnant return __i; 16563e519524SHoward Hinnant} 16573e519524SHoward Hinnant 16583e519524SHoward Hinnanttemplate <class _Tp> 16593e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 16603e519524SHoward Hinnanttypename enable_if 16613e519524SHoward Hinnant< 1662ca740483SHoward Hinnant is_trivially_copy_assignable<_Tp>::value, 16633e519524SHoward Hinnant _Tp* 16643e519524SHoward Hinnant>::type 16653e519524SHoward Hinnant__unwrap_iter(move_iterator<_Tp*> __i) 16663e519524SHoward Hinnant{ 16673e519524SHoward Hinnant return __i.base(); 16683e519524SHoward Hinnant} 16693e519524SHoward Hinnant 1670fc88dbd2SHoward Hinnant#if _LIBCPP_DEBUG_LEVEL < 2 1671fc88dbd2SHoward Hinnant 16723e519524SHoward Hinnanttemplate <class _Tp> 16733e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 16743e519524SHoward Hinnanttypename enable_if 16753e519524SHoward Hinnant< 1676ca740483SHoward Hinnant is_trivially_copy_assignable<_Tp>::value, 16773e519524SHoward Hinnant _Tp* 16783e519524SHoward Hinnant>::type 16793e519524SHoward Hinnant__unwrap_iter(__wrap_iter<_Tp*> __i) 16803e519524SHoward Hinnant{ 16813e519524SHoward Hinnant return __i.base(); 16823e519524SHoward Hinnant} 16833e519524SHoward Hinnant 1684*14bd0bf0SEric Fiselier#else 1685*14bd0bf0SEric Fiselier 1686*14bd0bf0SEric Fiseliertemplate <class _Tp> 1687*14bd0bf0SEric Fiselierinline _LIBCPP_INLINE_VISIBILITY 1688*14bd0bf0SEric Fiseliertypename enable_if 1689*14bd0bf0SEric Fiselier< 1690*14bd0bf0SEric Fiselier is_trivially_copy_assignable<_Tp>::value, 1691*14bd0bf0SEric Fiselier __wrap_iter<_Tp*> 1692*14bd0bf0SEric Fiselier>::type 1693*14bd0bf0SEric Fiselier__unwrap_iter(__wrap_iter<_Tp*> __i) 1694*14bd0bf0SEric Fiselier{ 1695*14bd0bf0SEric Fiselier return __i; 1696*14bd0bf0SEric Fiselier} 1697*14bd0bf0SEric Fiselier 1698fc88dbd2SHoward Hinnant#endif // _LIBCPP_DEBUG_LEVEL < 2 1699fc88dbd2SHoward Hinnant 17003e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator> 17013e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17023e519524SHoward Hinnant_OutputIterator 17033e519524SHoward Hinnant__copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 17043e519524SHoward Hinnant{ 1705910285b2SEric Fiselier for (; __first != __last; ++__first, (void) ++__result) 17063e519524SHoward Hinnant *__result = *__first; 17073e519524SHoward Hinnant return __result; 17083e519524SHoward Hinnant} 17093e519524SHoward Hinnant 17103e519524SHoward Hinnanttemplate <class _Tp, class _Up> 17113e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17123e519524SHoward Hinnanttypename enable_if 17133e519524SHoward Hinnant< 17143e519524SHoward Hinnant is_same<typename remove_const<_Tp>::type, _Up>::value && 1715ca740483SHoward Hinnant is_trivially_copy_assignable<_Up>::value, 17163e519524SHoward Hinnant _Up* 17173e519524SHoward Hinnant>::type 17183e519524SHoward Hinnant__copy(_Tp* __first, _Tp* __last, _Up* __result) 17193e519524SHoward Hinnant{ 17203e519524SHoward Hinnant const size_t __n = static_cast<size_t>(__last - __first); 17215b312052SMarshall Clow if (__n > 0) 1722ce48a113SHoward Hinnant _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 17233e519524SHoward Hinnant return __result + __n; 17243e519524SHoward Hinnant} 17253e519524SHoward Hinnant 17263e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator> 17273e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17283e519524SHoward Hinnant_OutputIterator 17293e519524SHoward Hinnantcopy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 17303e519524SHoward Hinnant{ 1731ce48a113SHoward Hinnant return _VSTD::__copy(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result)); 17323e519524SHoward Hinnant} 17333e519524SHoward Hinnant 17343e519524SHoward Hinnant// copy_backward 17353e519524SHoward Hinnant 1736d3d4356fSHoward Hinnanttemplate <class _BidirectionalIterator, class _OutputIterator> 17373e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17383e519524SHoward Hinnant_OutputIterator 1739d3d4356fSHoward Hinnant__copy_backward(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) 17403e519524SHoward Hinnant{ 17413e519524SHoward Hinnant while (__first != __last) 17423e519524SHoward Hinnant *--__result = *--__last; 17433e519524SHoward Hinnant return __result; 17443e519524SHoward Hinnant} 17453e519524SHoward Hinnant 17463e519524SHoward Hinnanttemplate <class _Tp, class _Up> 17473e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17483e519524SHoward Hinnanttypename enable_if 17493e519524SHoward Hinnant< 17503e519524SHoward Hinnant is_same<typename remove_const<_Tp>::type, _Up>::value && 1751ca740483SHoward Hinnant is_trivially_copy_assignable<_Up>::value, 17523e519524SHoward Hinnant _Up* 17533e519524SHoward Hinnant>::type 17543e519524SHoward Hinnant__copy_backward(_Tp* __first, _Tp* __last, _Up* __result) 17553e519524SHoward Hinnant{ 17563e519524SHoward Hinnant const size_t __n = static_cast<size_t>(__last - __first); 17575b312052SMarshall Clow if (__n > 0) 17585b312052SMarshall Clow { 17593e519524SHoward Hinnant __result -= __n; 1760ce48a113SHoward Hinnant _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 17615b312052SMarshall Clow } 17623e519524SHoward Hinnant return __result; 17633e519524SHoward Hinnant} 17643e519524SHoward Hinnant 17653e519524SHoward Hinnanttemplate <class _BidirectionalIterator1, class _BidirectionalIterator2> 17663e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17673e519524SHoward Hinnant_BidirectionalIterator2 17683e519524SHoward Hinnantcopy_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, 17693e519524SHoward Hinnant _BidirectionalIterator2 __result) 17703e519524SHoward Hinnant{ 1771fd838227SEric Fiselier return _VSTD::__copy_backward(__unwrap_iter(__first), 1772fd838227SEric Fiselier __unwrap_iter(__last), 1773fd838227SEric Fiselier __unwrap_iter(__result)); 17743e519524SHoward Hinnant} 17753e519524SHoward Hinnant 17763e519524SHoward Hinnant// copy_if 17773e519524SHoward Hinnant 17783e519524SHoward Hinnanttemplate<class _InputIterator, class _OutputIterator, class _Predicate> 17793e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17803e519524SHoward Hinnant_OutputIterator 17813e519524SHoward Hinnantcopy_if(_InputIterator __first, _InputIterator __last, 17823e519524SHoward Hinnant _OutputIterator __result, _Predicate __pred) 17833e519524SHoward Hinnant{ 17843e519524SHoward Hinnant for (; __first != __last; ++__first) 17853e519524SHoward Hinnant { 17863e519524SHoward Hinnant if (__pred(*__first)) 17873e519524SHoward Hinnant { 17883e519524SHoward Hinnant *__result = *__first; 17893e519524SHoward Hinnant ++__result; 17903e519524SHoward Hinnant } 17913e519524SHoward Hinnant } 17923e519524SHoward Hinnant return __result; 17933e519524SHoward Hinnant} 17943e519524SHoward Hinnant 17953e519524SHoward Hinnant// copy_n 17963e519524SHoward Hinnant 17973e519524SHoward Hinnanttemplate<class _InputIterator, class _Size, class _OutputIterator> 17983e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 17993e519524SHoward Hinnanttypename enable_if 18003e519524SHoward Hinnant< 18013e519524SHoward Hinnant __is_input_iterator<_InputIterator>::value && 18023e519524SHoward Hinnant !__is_random_access_iterator<_InputIterator>::value, 18033e519524SHoward Hinnant _OutputIterator 18043e519524SHoward Hinnant>::type 180551544023SEric Fiseliercopy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) 18063e519524SHoward Hinnant{ 180751544023SEric Fiselier typedef decltype(__convert_to_integral(__orig_n)) _IntegralSize; 180851544023SEric Fiselier _IntegralSize __n = __orig_n; 180999847d2bSHoward Hinnant if (__n > 0) 181099847d2bSHoward Hinnant { 18113e519524SHoward Hinnant *__result = *__first; 181299847d2bSHoward Hinnant ++__result; 181399847d2bSHoward Hinnant for (--__n; __n > 0; --__n) 181499847d2bSHoward Hinnant { 181599847d2bSHoward Hinnant ++__first; 181699847d2bSHoward Hinnant *__result = *__first; 181799847d2bSHoward Hinnant ++__result; 181899847d2bSHoward Hinnant } 181999847d2bSHoward Hinnant } 18203e519524SHoward Hinnant return __result; 18213e519524SHoward Hinnant} 18223e519524SHoward Hinnant 18233e519524SHoward Hinnanttemplate<class _InputIterator, class _Size, class _OutputIterator> 18243e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 18253e519524SHoward Hinnanttypename enable_if 18263e519524SHoward Hinnant< 18273e519524SHoward Hinnant __is_random_access_iterator<_InputIterator>::value, 18283e519524SHoward Hinnant _OutputIterator 18293e519524SHoward Hinnant>::type 183051544023SEric Fiseliercopy_n(_InputIterator __first, _Size __orig_n, _OutputIterator __result) 18313e519524SHoward Hinnant{ 183251544023SEric Fiselier typedef decltype(__convert_to_integral(__orig_n)) _IntegralSize; 183351544023SEric Fiselier _IntegralSize __n = __orig_n; 1834ce48a113SHoward Hinnant return _VSTD::copy(__first, __first + __n, __result); 18353e519524SHoward Hinnant} 18363e519524SHoward Hinnant 18373e519524SHoward Hinnant// move 18383e519524SHoward Hinnant 18393e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator> 18403e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 18413e519524SHoward Hinnant_OutputIterator 18423e519524SHoward Hinnant__move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 18433e519524SHoward Hinnant{ 1844910285b2SEric Fiselier for (; __first != __last; ++__first, (void) ++__result) 1845ce48a113SHoward Hinnant *__result = _VSTD::move(*__first); 18463e519524SHoward Hinnant return __result; 18473e519524SHoward Hinnant} 18483e519524SHoward Hinnant 18493e519524SHoward Hinnanttemplate <class _Tp, class _Up> 18503e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 18513e519524SHoward Hinnanttypename enable_if 18523e519524SHoward Hinnant< 18533e519524SHoward Hinnant is_same<typename remove_const<_Tp>::type, _Up>::value && 1854ca740483SHoward Hinnant is_trivially_copy_assignable<_Up>::value, 18553e519524SHoward Hinnant _Up* 18563e519524SHoward Hinnant>::type 18573e519524SHoward Hinnant__move(_Tp* __first, _Tp* __last, _Up* __result) 18583e519524SHoward Hinnant{ 18593e519524SHoward Hinnant const size_t __n = static_cast<size_t>(__last - __first); 18605b312052SMarshall Clow if (__n > 0) 1861ce48a113SHoward Hinnant _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 18623e519524SHoward Hinnant return __result + __n; 18633e519524SHoward Hinnant} 18643e519524SHoward Hinnant 18653e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator> 18663e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 18673e519524SHoward Hinnant_OutputIterator 18683e519524SHoward Hinnantmove(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 18693e519524SHoward Hinnant{ 1870ce48a113SHoward Hinnant return _VSTD::__move(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result)); 18713e519524SHoward Hinnant} 18723e519524SHoward Hinnant 18733e519524SHoward Hinnant// move_backward 18743e519524SHoward Hinnant 18753e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator> 18763e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 18773e519524SHoward Hinnant_OutputIterator 18783e519524SHoward Hinnant__move_backward(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 18793e519524SHoward Hinnant{ 18803e519524SHoward Hinnant while (__first != __last) 1881ce48a113SHoward Hinnant *--__result = _VSTD::move(*--__last); 18823e519524SHoward Hinnant return __result; 18833e519524SHoward Hinnant} 18843e519524SHoward Hinnant 18853e519524SHoward Hinnanttemplate <class _Tp, class _Up> 18863e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 18873e519524SHoward Hinnanttypename enable_if 18883e519524SHoward Hinnant< 18893e519524SHoward Hinnant is_same<typename remove_const<_Tp>::type, _Up>::value && 1890ca740483SHoward Hinnant is_trivially_copy_assignable<_Up>::value, 18913e519524SHoward Hinnant _Up* 18923e519524SHoward Hinnant>::type 18933e519524SHoward Hinnant__move_backward(_Tp* __first, _Tp* __last, _Up* __result) 18943e519524SHoward Hinnant{ 18953e519524SHoward Hinnant const size_t __n = static_cast<size_t>(__last - __first); 18965b312052SMarshall Clow if (__n > 0) 18975b312052SMarshall Clow { 18983e519524SHoward Hinnant __result -= __n; 1899ce48a113SHoward Hinnant _VSTD::memmove(__result, __first, __n * sizeof(_Up)); 19005b312052SMarshall Clow } 19013e519524SHoward Hinnant return __result; 19023e519524SHoward Hinnant} 19033e519524SHoward Hinnant 19043e519524SHoward Hinnanttemplate <class _BidirectionalIterator1, class _BidirectionalIterator2> 19053e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 19063e519524SHoward Hinnant_BidirectionalIterator2 19073e519524SHoward Hinnantmove_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, 19083e519524SHoward Hinnant _BidirectionalIterator2 __result) 19093e519524SHoward Hinnant{ 1910ce48a113SHoward Hinnant return _VSTD::__move_backward(__unwrap_iter(__first), __unwrap_iter(__last), __unwrap_iter(__result)); 19113e519524SHoward Hinnant} 19123e519524SHoward Hinnant 19133e519524SHoward Hinnant// iter_swap 19143e519524SHoward Hinnant 1915a676f7d3SHoward Hinnant// moved to <type_traits> for better swap / noexcept support 19163e519524SHoward Hinnant 19173e519524SHoward Hinnant// transform 19183e519524SHoward Hinnant 19193e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator, class _UnaryOperation> 19203e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 19213e519524SHoward Hinnant_OutputIterator 19223e519524SHoward Hinnanttransform(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _UnaryOperation __op) 19233e519524SHoward Hinnant{ 1924910285b2SEric Fiselier for (; __first != __last; ++__first, (void) ++__result) 19253e519524SHoward Hinnant *__result = __op(*__first); 19263e519524SHoward Hinnant return __result; 19273e519524SHoward Hinnant} 19283e519524SHoward Hinnant 19293e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _BinaryOperation> 19303e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 19313e519524SHoward Hinnant_OutputIterator 19323e519524SHoward Hinnanttransform(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, 19333e519524SHoward Hinnant _OutputIterator __result, _BinaryOperation __binary_op) 19343e519524SHoward Hinnant{ 1935910285b2SEric Fiselier for (; __first1 != __last1; ++__first1, (void) ++__first2, ++__result) 19363e519524SHoward Hinnant *__result = __binary_op(*__first1, *__first2); 19373e519524SHoward Hinnant return __result; 19383e519524SHoward Hinnant} 19393e519524SHoward Hinnant 19403e519524SHoward Hinnant// replace 19413e519524SHoward Hinnant 19423e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 19433e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 19443e519524SHoward Hinnantvoid 19453e519524SHoward Hinnantreplace(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __old_value, const _Tp& __new_value) 19463e519524SHoward Hinnant{ 19473e519524SHoward Hinnant for (; __first != __last; ++__first) 19483e519524SHoward Hinnant if (*__first == __old_value) 19493e519524SHoward Hinnant *__first = __new_value; 19503e519524SHoward Hinnant} 19513e519524SHoward Hinnant 19523e519524SHoward Hinnant// replace_if 19533e519524SHoward Hinnant 19543e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Predicate, class _Tp> 19553e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 19563e519524SHoward Hinnantvoid 19573e519524SHoward Hinnantreplace_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, const _Tp& __new_value) 19583e519524SHoward Hinnant{ 19593e519524SHoward Hinnant for (; __first != __last; ++__first) 19603e519524SHoward Hinnant if (__pred(*__first)) 19613e519524SHoward Hinnant *__first = __new_value; 19623e519524SHoward Hinnant} 19633e519524SHoward Hinnant 19643e519524SHoward Hinnant// replace_copy 19653e519524SHoward Hinnant 19663e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator, class _Tp> 19673e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 19683e519524SHoward Hinnant_OutputIterator 19693e519524SHoward Hinnantreplace_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, 19703e519524SHoward Hinnant const _Tp& __old_value, const _Tp& __new_value) 19713e519524SHoward Hinnant{ 1972910285b2SEric Fiselier for (; __first != __last; ++__first, (void) ++__result) 19733e519524SHoward Hinnant if (*__first == __old_value) 19743e519524SHoward Hinnant *__result = __new_value; 19753e519524SHoward Hinnant else 19763e519524SHoward Hinnant *__result = *__first; 19773e519524SHoward Hinnant return __result; 19783e519524SHoward Hinnant} 19793e519524SHoward Hinnant 19803e519524SHoward Hinnant// replace_copy_if 19813e519524SHoward Hinnant 19823e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator, class _Predicate, class _Tp> 19833e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 19843e519524SHoward Hinnant_OutputIterator 19853e519524SHoward Hinnantreplace_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, 19863e519524SHoward Hinnant _Predicate __pred, const _Tp& __new_value) 19873e519524SHoward Hinnant{ 1988910285b2SEric Fiselier for (; __first != __last; ++__first, (void) ++__result) 19893e519524SHoward Hinnant if (__pred(*__first)) 19903e519524SHoward Hinnant *__result = __new_value; 19913e519524SHoward Hinnant else 19923e519524SHoward Hinnant *__result = *__first; 19933e519524SHoward Hinnant return __result; 19943e519524SHoward Hinnant} 19953e519524SHoward Hinnant 19963e519524SHoward Hinnant// fill_n 19973e519524SHoward Hinnant 19983e519524SHoward Hinnanttemplate <class _OutputIterator, class _Size, class _Tp> 19993e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20003e519524SHoward Hinnant_OutputIterator 20010f242beaSHoward Hinnant__fill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) 20023e519524SHoward Hinnant{ 2003910285b2SEric Fiselier for (; __n > 0; ++__first, (void) --__n) 2004e4383379SHoward Hinnant *__first = __value_; 20053e519524SHoward Hinnant return __first; 20063e519524SHoward Hinnant} 20073e519524SHoward Hinnant 20080f242beaSHoward Hinnanttemplate <class _Tp, class _Size, class _Up> 20093e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20100f242beaSHoward Hinnanttypename enable_if 20110f242beaSHoward Hinnant< 20120f242beaSHoward Hinnant is_integral<_Tp>::value && sizeof(_Tp) == 1 && 20130f242beaSHoward Hinnant !is_same<_Tp, bool>::value && 20140f242beaSHoward Hinnant is_integral<_Up>::value && sizeof(_Up) == 1, 20150f242beaSHoward Hinnant _Tp* 20160f242beaSHoward Hinnant>::type 20170f242beaSHoward Hinnant__fill_n(_Tp* __first, _Size __n,_Up __value_) 20183e519524SHoward Hinnant{ 20193e519524SHoward Hinnant if (__n > 0) 2020e4383379SHoward Hinnant _VSTD::memset(__first, (unsigned char)__value_, (size_t)(__n)); 20213e519524SHoward Hinnant return __first + __n; 20223e519524SHoward Hinnant} 20233e519524SHoward Hinnant 20243e519524SHoward Hinnanttemplate <class _OutputIterator, class _Size, class _Tp> 20253e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20263e519524SHoward Hinnant_OutputIterator 2027e4383379SHoward Hinnantfill_n(_OutputIterator __first, _Size __n, const _Tp& __value_) 20283e519524SHoward Hinnant{ 202951544023SEric Fiselier return _VSTD::__fill_n(__first, __convert_to_integral(__n), __value_); 20303e519524SHoward Hinnant} 20313e519524SHoward Hinnant 20323e519524SHoward Hinnant// fill 20333e519524SHoward Hinnant 20343e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 20353e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20363e519524SHoward Hinnantvoid 2037e4383379SHoward Hinnant__fill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, forward_iterator_tag) 20383e519524SHoward Hinnant{ 20393e519524SHoward Hinnant for (; __first != __last; ++__first) 2040e4383379SHoward Hinnant *__first = __value_; 20413e519524SHoward Hinnant} 20423e519524SHoward Hinnant 20433e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Tp> 20443e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20453e519524SHoward Hinnantvoid 2046e4383379SHoward Hinnant__fill(_RandomAccessIterator __first, _RandomAccessIterator __last, const _Tp& __value_, random_access_iterator_tag) 20473e519524SHoward Hinnant{ 2048e4383379SHoward Hinnant _VSTD::fill_n(__first, __last - __first, __value_); 20493e519524SHoward Hinnant} 20503e519524SHoward Hinnant 20513e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 20523e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20533e519524SHoward Hinnantvoid 2054e4383379SHoward Hinnantfill(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 20553e519524SHoward Hinnant{ 2056e4383379SHoward Hinnant _VSTD::__fill(__first, __last, __value_, typename iterator_traits<_ForwardIterator>::iterator_category()); 20573e519524SHoward Hinnant} 20583e519524SHoward Hinnant 20593e519524SHoward Hinnant// generate 20603e519524SHoward Hinnant 20613e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Generator> 20623e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20633e519524SHoward Hinnantvoid 20643e519524SHoward Hinnantgenerate(_ForwardIterator __first, _ForwardIterator __last, _Generator __gen) 20653e519524SHoward Hinnant{ 20663e519524SHoward Hinnant for (; __first != __last; ++__first) 20673e519524SHoward Hinnant *__first = __gen(); 20683e519524SHoward Hinnant} 20693e519524SHoward Hinnant 20703e519524SHoward Hinnant// generate_n 20713e519524SHoward Hinnant 20723e519524SHoward Hinnanttemplate <class _OutputIterator, class _Size, class _Generator> 20733e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 20743e519524SHoward Hinnant_OutputIterator 207551544023SEric Fiseliergenerate_n(_OutputIterator __first, _Size __orig_n, _Generator __gen) 20763e519524SHoward Hinnant{ 207751544023SEric Fiselier typedef decltype(__convert_to_integral(__orig_n)) _IntegralSize; 207851544023SEric Fiselier _IntegralSize __n = __orig_n; 2079910285b2SEric Fiselier for (; __n > 0; ++__first, (void) --__n) 20803e519524SHoward Hinnant *__first = __gen(); 20813e519524SHoward Hinnant return __first; 20823e519524SHoward Hinnant} 20833e519524SHoward Hinnant 20843e519524SHoward Hinnant// remove 20853e519524SHoward Hinnant 20863e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 20873e519524SHoward Hinnant_ForwardIterator 2088e4383379SHoward Hinnantremove(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 20893e519524SHoward Hinnant{ 2090e4383379SHoward Hinnant __first = _VSTD::find(__first, __last, __value_); 20913e519524SHoward Hinnant if (__first != __last) 20923e519524SHoward Hinnant { 20933e519524SHoward Hinnant _ForwardIterator __i = __first; 20943e519524SHoward Hinnant while (++__i != __last) 20953e519524SHoward Hinnant { 2096e4383379SHoward Hinnant if (!(*__i == __value_)) 20973e519524SHoward Hinnant { 2098ce48a113SHoward Hinnant *__first = _VSTD::move(*__i); 20993e519524SHoward Hinnant ++__first; 21003e519524SHoward Hinnant } 21013e519524SHoward Hinnant } 21023e519524SHoward Hinnant } 21033e519524SHoward Hinnant return __first; 21043e519524SHoward Hinnant} 21053e519524SHoward Hinnant 21063e519524SHoward Hinnant// remove_if 21073e519524SHoward Hinnant 21083e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Predicate> 21093e519524SHoward Hinnant_ForwardIterator 21103e519524SHoward Hinnantremove_if(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 21113e519524SHoward Hinnant{ 2112ce48a113SHoward Hinnant __first = _VSTD::find_if<_ForwardIterator, typename add_lvalue_reference<_Predicate>::type> 21133e519524SHoward Hinnant (__first, __last, __pred); 21143e519524SHoward Hinnant if (__first != __last) 21153e519524SHoward Hinnant { 21163e519524SHoward Hinnant _ForwardIterator __i = __first; 21173e519524SHoward Hinnant while (++__i != __last) 21183e519524SHoward Hinnant { 21193e519524SHoward Hinnant if (!__pred(*__i)) 21203e519524SHoward Hinnant { 2121ce48a113SHoward Hinnant *__first = _VSTD::move(*__i); 21223e519524SHoward Hinnant ++__first; 21233e519524SHoward Hinnant } 21243e519524SHoward Hinnant } 21253e519524SHoward Hinnant } 21263e519524SHoward Hinnant return __first; 21273e519524SHoward Hinnant} 21283e519524SHoward Hinnant 21293e519524SHoward Hinnant// remove_copy 21303e519524SHoward Hinnant 21313e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator, class _Tp> 21323e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 21333e519524SHoward Hinnant_OutputIterator 2134e4383379SHoward Hinnantremove_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, const _Tp& __value_) 21353e519524SHoward Hinnant{ 21363e519524SHoward Hinnant for (; __first != __last; ++__first) 21373e519524SHoward Hinnant { 2138e4383379SHoward Hinnant if (!(*__first == __value_)) 21393e519524SHoward Hinnant { 21403e519524SHoward Hinnant *__result = *__first; 21413e519524SHoward Hinnant ++__result; 21423e519524SHoward Hinnant } 21433e519524SHoward Hinnant } 21443e519524SHoward Hinnant return __result; 21453e519524SHoward Hinnant} 21463e519524SHoward Hinnant 21473e519524SHoward Hinnant// remove_copy_if 21483e519524SHoward Hinnant 21493e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator, class _Predicate> 21503e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 21513e519524SHoward Hinnant_OutputIterator 21523e519524SHoward Hinnantremove_copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Predicate __pred) 21533e519524SHoward Hinnant{ 21543e519524SHoward Hinnant for (; __first != __last; ++__first) 21553e519524SHoward Hinnant { 21563e519524SHoward Hinnant if (!__pred(*__first)) 21573e519524SHoward Hinnant { 21583e519524SHoward Hinnant *__result = *__first; 21593e519524SHoward Hinnant ++__result; 21603e519524SHoward Hinnant } 21613e519524SHoward Hinnant } 21623e519524SHoward Hinnant return __result; 21633e519524SHoward Hinnant} 21643e519524SHoward Hinnant 21653e519524SHoward Hinnant// unique 21663e519524SHoward Hinnant 21673e519524SHoward Hinnanttemplate <class _ForwardIterator, class _BinaryPredicate> 21683e519524SHoward Hinnant_ForwardIterator 21693e519524SHoward Hinnantunique(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) 21703e519524SHoward Hinnant{ 2171ce48a113SHoward Hinnant __first = _VSTD::adjacent_find<_ForwardIterator, typename add_lvalue_reference<_BinaryPredicate>::type> 21723e519524SHoward Hinnant (__first, __last, __pred); 21733e519524SHoward Hinnant if (__first != __last) 21743e519524SHoward Hinnant { 21753e519524SHoward Hinnant // ... a a ? ... 21763e519524SHoward Hinnant // f i 21773e519524SHoward Hinnant _ForwardIterator __i = __first; 21783e519524SHoward Hinnant for (++__i; ++__i != __last;) 21793e519524SHoward Hinnant if (!__pred(*__first, *__i)) 2180ce48a113SHoward Hinnant *++__first = _VSTD::move(*__i); 21813e519524SHoward Hinnant ++__first; 21823e519524SHoward Hinnant } 21833e519524SHoward Hinnant return __first; 21843e519524SHoward Hinnant} 21853e519524SHoward Hinnant 21863e519524SHoward Hinnanttemplate <class _ForwardIterator> 21873e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 21883e519524SHoward Hinnant_ForwardIterator 21893e519524SHoward Hinnantunique(_ForwardIterator __first, _ForwardIterator __last) 21903e519524SHoward Hinnant{ 21913e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::value_type __v; 2192ce48a113SHoward Hinnant return _VSTD::unique(__first, __last, __equal_to<__v>()); 21933e519524SHoward Hinnant} 21943e519524SHoward Hinnant 21953e519524SHoward Hinnant// unique_copy 21963e519524SHoward Hinnant 21973e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _InputIterator, class _OutputIterator> 21983e519524SHoward Hinnant_OutputIterator 21993e519524SHoward Hinnant__unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred, 22003e519524SHoward Hinnant input_iterator_tag, output_iterator_tag) 22013e519524SHoward Hinnant{ 22023e519524SHoward Hinnant if (__first != __last) 22033e519524SHoward Hinnant { 22043e519524SHoward Hinnant typename iterator_traits<_InputIterator>::value_type __t(*__first); 22053e519524SHoward Hinnant *__result = __t; 22063e519524SHoward Hinnant ++__result; 22073e519524SHoward Hinnant while (++__first != __last) 22083e519524SHoward Hinnant { 22093e519524SHoward Hinnant if (!__pred(__t, *__first)) 22103e519524SHoward Hinnant { 22113e519524SHoward Hinnant __t = *__first; 22123e519524SHoward Hinnant *__result = __t; 22133e519524SHoward Hinnant ++__result; 22143e519524SHoward Hinnant } 22153e519524SHoward Hinnant } 22163e519524SHoward Hinnant } 22173e519524SHoward Hinnant return __result; 22183e519524SHoward Hinnant} 22193e519524SHoward Hinnant 22203e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _ForwardIterator, class _OutputIterator> 22213e519524SHoward Hinnant_OutputIterator 22223e519524SHoward Hinnant__unique_copy(_ForwardIterator __first, _ForwardIterator __last, _OutputIterator __result, _BinaryPredicate __pred, 22233e519524SHoward Hinnant forward_iterator_tag, output_iterator_tag) 22243e519524SHoward Hinnant{ 22253e519524SHoward Hinnant if (__first != __last) 22263e519524SHoward Hinnant { 22273e519524SHoward Hinnant _ForwardIterator __i = __first; 22283e519524SHoward Hinnant *__result = *__i; 22293e519524SHoward Hinnant ++__result; 22303e519524SHoward Hinnant while (++__first != __last) 22313e519524SHoward Hinnant { 22323e519524SHoward Hinnant if (!__pred(*__i, *__first)) 22333e519524SHoward Hinnant { 22343e519524SHoward Hinnant *__result = *__first; 22353e519524SHoward Hinnant ++__result; 22363e519524SHoward Hinnant __i = __first; 22373e519524SHoward Hinnant } 22383e519524SHoward Hinnant } 22393e519524SHoward Hinnant } 22403e519524SHoward Hinnant return __result; 22413e519524SHoward Hinnant} 22423e519524SHoward Hinnant 22433e519524SHoward Hinnanttemplate <class _BinaryPredicate, class _InputIterator, class _ForwardIterator> 22443e519524SHoward Hinnant_ForwardIterator 22453e519524SHoward Hinnant__unique_copy(_InputIterator __first, _InputIterator __last, _ForwardIterator __result, _BinaryPredicate __pred, 22463e519524SHoward Hinnant input_iterator_tag, forward_iterator_tag) 22473e519524SHoward Hinnant{ 22483e519524SHoward Hinnant if (__first != __last) 22493e519524SHoward Hinnant { 22503e519524SHoward Hinnant *__result = *__first; 22513e519524SHoward Hinnant while (++__first != __last) 22523e519524SHoward Hinnant if (!__pred(*__result, *__first)) 22533e519524SHoward Hinnant *++__result = *__first; 22543e519524SHoward Hinnant ++__result; 22553e519524SHoward Hinnant } 22563e519524SHoward Hinnant return __result; 22573e519524SHoward Hinnant} 22583e519524SHoward Hinnant 22593e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator, class _BinaryPredicate> 22603e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 22613e519524SHoward Hinnant_OutputIterator 22623e519524SHoward Hinnantunique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) 22633e519524SHoward Hinnant{ 2264ce48a113SHoward Hinnant return _VSTD::__unique_copy<typename add_lvalue_reference<_BinaryPredicate>::type> 22653e519524SHoward Hinnant (__first, __last, __result, __pred, 22663e519524SHoward Hinnant typename iterator_traits<_InputIterator>::iterator_category(), 22673e519524SHoward Hinnant typename iterator_traits<_OutputIterator>::iterator_category()); 22683e519524SHoward Hinnant} 22693e519524SHoward Hinnant 22703e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator> 22713e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 22723e519524SHoward Hinnant_OutputIterator 22733e519524SHoward Hinnantunique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) 22743e519524SHoward Hinnant{ 22753e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator>::value_type __v; 2276ce48a113SHoward Hinnant return _VSTD::unique_copy(__first, __last, __result, __equal_to<__v>()); 22773e519524SHoward Hinnant} 22783e519524SHoward Hinnant 22793e519524SHoward Hinnant// reverse 22803e519524SHoward Hinnant 22813e519524SHoward Hinnanttemplate <class _BidirectionalIterator> 22823e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 22833e519524SHoward Hinnantvoid 22843e519524SHoward Hinnant__reverse(_BidirectionalIterator __first, _BidirectionalIterator __last, bidirectional_iterator_tag) 22853e519524SHoward Hinnant{ 22863e519524SHoward Hinnant while (__first != __last) 22873e519524SHoward Hinnant { 22883e519524SHoward Hinnant if (__first == --__last) 22893e519524SHoward Hinnant break; 2290def501d1SMarshall Clow _VSTD::iter_swap(__first, __last); 22913e519524SHoward Hinnant ++__first; 22923e519524SHoward Hinnant } 22933e519524SHoward Hinnant} 22943e519524SHoward Hinnant 22953e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 22963e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 22973e519524SHoward Hinnantvoid 22983e519524SHoward Hinnant__reverse(_RandomAccessIterator __first, _RandomAccessIterator __last, random_access_iterator_tag) 22993e519524SHoward Hinnant{ 23003e519524SHoward Hinnant if (__first != __last) 23013e519524SHoward Hinnant for (; __first < --__last; ++__first) 2302def501d1SMarshall Clow _VSTD::iter_swap(__first, __last); 23033e519524SHoward Hinnant} 23043e519524SHoward Hinnant 23053e519524SHoward Hinnanttemplate <class _BidirectionalIterator> 23063e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 23073e519524SHoward Hinnantvoid 23083e519524SHoward Hinnantreverse(_BidirectionalIterator __first, _BidirectionalIterator __last) 23093e519524SHoward Hinnant{ 2310ce48a113SHoward Hinnant _VSTD::__reverse(__first, __last, typename iterator_traits<_BidirectionalIterator>::iterator_category()); 23113e519524SHoward Hinnant} 23123e519524SHoward Hinnant 23133e519524SHoward Hinnant// reverse_copy 23143e519524SHoward Hinnant 23153e519524SHoward Hinnanttemplate <class _BidirectionalIterator, class _OutputIterator> 23163e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 23173e519524SHoward Hinnant_OutputIterator 23183e519524SHoward Hinnantreverse_copy(_BidirectionalIterator __first, _BidirectionalIterator __last, _OutputIterator __result) 23193e519524SHoward Hinnant{ 23203e519524SHoward Hinnant for (; __first != __last; ++__result) 23213e519524SHoward Hinnant *__result = *--__last; 23223e519524SHoward Hinnant return __result; 23233e519524SHoward Hinnant} 23243e519524SHoward Hinnant 23253e519524SHoward Hinnant// rotate 23263e519524SHoward Hinnant 23273e519524SHoward Hinnanttemplate <class _ForwardIterator> 23283e519524SHoward Hinnant_ForwardIterator 2329aca09de3SHoward Hinnant__rotate_left(_ForwardIterator __first, _ForwardIterator __last) 23303e519524SHoward Hinnant{ 2331aca09de3SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2332aca09de3SHoward Hinnant value_type __tmp = _VSTD::move(*__first); 2333aca09de3SHoward Hinnant _ForwardIterator __lm1 = _VSTD::move(_VSTD::next(__first), __last, __first); 2334aca09de3SHoward Hinnant *__lm1 = _VSTD::move(__tmp); 2335aca09de3SHoward Hinnant return __lm1; 2336aca09de3SHoward Hinnant} 2337aca09de3SHoward Hinnant 2338aca09de3SHoward Hinnanttemplate <class _BidirectionalIterator> 2339aca09de3SHoward Hinnant_BidirectionalIterator 2340aca09de3SHoward Hinnant__rotate_right(_BidirectionalIterator __first, _BidirectionalIterator __last) 2341aca09de3SHoward Hinnant{ 2342aca09de3SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 2343aca09de3SHoward Hinnant _BidirectionalIterator __lm1 = _VSTD::prev(__last); 2344aca09de3SHoward Hinnant value_type __tmp = _VSTD::move(*__lm1); 2345aca09de3SHoward Hinnant _BidirectionalIterator __fp1 = _VSTD::move_backward(__first, __lm1, __last); 2346aca09de3SHoward Hinnant *__first = _VSTD::move(__tmp); 2347aca09de3SHoward Hinnant return __fp1; 2348aca09de3SHoward Hinnant} 2349aca09de3SHoward Hinnant 2350aca09de3SHoward Hinnanttemplate <class _ForwardIterator> 2351aca09de3SHoward Hinnant_ForwardIterator 2352aca09de3SHoward Hinnant__rotate_forward(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) 2353aca09de3SHoward Hinnant{ 23543e519524SHoward Hinnant _ForwardIterator __i = __middle; 23553e519524SHoward Hinnant while (true) 23563e519524SHoward Hinnant { 23573e519524SHoward Hinnant swap(*__first, *__i); 23583e519524SHoward Hinnant ++__first; 23593e519524SHoward Hinnant if (++__i == __last) 23603e519524SHoward Hinnant break; 23613e519524SHoward Hinnant if (__first == __middle) 23623e519524SHoward Hinnant __middle = __i; 23633e519524SHoward Hinnant } 23643e519524SHoward Hinnant _ForwardIterator __r = __first; 23653e519524SHoward Hinnant if (__first != __middle) 23663e519524SHoward Hinnant { 23673e519524SHoward Hinnant __i = __middle; 23683e519524SHoward Hinnant while (true) 23693e519524SHoward Hinnant { 23703e519524SHoward Hinnant swap(*__first, *__i); 23713e519524SHoward Hinnant ++__first; 23723e519524SHoward Hinnant if (++__i == __last) 23733e519524SHoward Hinnant { 23743e519524SHoward Hinnant if (__first == __middle) 23753e519524SHoward Hinnant break; 23763e519524SHoward Hinnant __i = __middle; 23773e519524SHoward Hinnant } 23783e519524SHoward Hinnant else if (__first == __middle) 23793e519524SHoward Hinnant __middle = __i; 23803e519524SHoward Hinnant } 23813e519524SHoward Hinnant } 23823e519524SHoward Hinnant return __r; 23833e519524SHoward Hinnant} 23843e519524SHoward Hinnant 23853e519524SHoward Hinnanttemplate<typename _Integral> 23863e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 23873e519524SHoward Hinnant_Integral 238819b4035fSMarshall Clow__algo_gcd(_Integral __x, _Integral __y) 23893e519524SHoward Hinnant{ 23903e519524SHoward Hinnant do 23913e519524SHoward Hinnant { 23923e519524SHoward Hinnant _Integral __t = __x % __y; 23933e519524SHoward Hinnant __x = __y; 23943e519524SHoward Hinnant __y = __t; 23953e519524SHoward Hinnant } while (__y); 23963e519524SHoward Hinnant return __x; 23973e519524SHoward Hinnant} 23983e519524SHoward Hinnant 23993e519524SHoward Hinnanttemplate<typename _RandomAccessIterator> 24003e519524SHoward Hinnant_RandomAccessIterator 2401aca09de3SHoward Hinnant__rotate_gcd(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) 24023e519524SHoward Hinnant{ 24033e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 24043e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 24053e519524SHoward Hinnant 24063e519524SHoward Hinnant const difference_type __m1 = __middle - __first; 24073e519524SHoward Hinnant const difference_type __m2 = __last - __middle; 24083e519524SHoward Hinnant if (__m1 == __m2) 24093e519524SHoward Hinnant { 2410ce48a113SHoward Hinnant _VSTD::swap_ranges(__first, __middle, __middle); 24113e519524SHoward Hinnant return __middle; 24123e519524SHoward Hinnant } 241319b4035fSMarshall Clow const difference_type __g = _VSTD::__algo_gcd(__m1, __m2); 24143e519524SHoward Hinnant for (_RandomAccessIterator __p = __first + __g; __p != __first;) 24153e519524SHoward Hinnant { 2416aca09de3SHoward Hinnant value_type __t(_VSTD::move(*--__p)); 24173e519524SHoward Hinnant _RandomAccessIterator __p1 = __p; 24183e519524SHoward Hinnant _RandomAccessIterator __p2 = __p1 + __m1; 24193e519524SHoward Hinnant do 24203e519524SHoward Hinnant { 2421aca09de3SHoward Hinnant *__p1 = _VSTD::move(*__p2); 24223e519524SHoward Hinnant __p1 = __p2; 24233e519524SHoward Hinnant const difference_type __d = __last - __p2; 24243e519524SHoward Hinnant if (__m1 < __d) 24253e519524SHoward Hinnant __p2 += __m1; 24263e519524SHoward Hinnant else 24273e519524SHoward Hinnant __p2 = __first + (__m1 - __d); 24283e519524SHoward Hinnant } while (__p2 != __p); 2429aca09de3SHoward Hinnant *__p1 = _VSTD::move(__t); 24303e519524SHoward Hinnant } 24313e519524SHoward Hinnant return __first + __m2; 24323e519524SHoward Hinnant} 24333e519524SHoward Hinnant 24343e519524SHoward Hinnanttemplate <class _ForwardIterator> 24353e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 24363e519524SHoward Hinnant_ForwardIterator 2437aca09de3SHoward Hinnant__rotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, 2438aca09de3SHoward Hinnant _VSTD::forward_iterator_tag) 2439aca09de3SHoward Hinnant{ 2440aca09de3SHoward Hinnant typedef typename _VSTD::iterator_traits<_ForwardIterator>::value_type value_type; 2441aca09de3SHoward Hinnant if (_VSTD::is_trivially_move_assignable<value_type>::value) 2442aca09de3SHoward Hinnant { 2443aca09de3SHoward Hinnant if (_VSTD::next(__first) == __middle) 2444aca09de3SHoward Hinnant return _VSTD::__rotate_left(__first, __last); 2445aca09de3SHoward Hinnant } 2446aca09de3SHoward Hinnant return _VSTD::__rotate_forward(__first, __middle, __last); 2447aca09de3SHoward Hinnant} 2448aca09de3SHoward Hinnant 2449aca09de3SHoward Hinnanttemplate <class _BidirectionalIterator> 2450aca09de3SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 2451aca09de3SHoward Hinnant_BidirectionalIterator 2452aca09de3SHoward Hinnant__rotate(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 2453aca09de3SHoward Hinnant _VSTD::bidirectional_iterator_tag) 2454aca09de3SHoward Hinnant{ 2455aca09de3SHoward Hinnant typedef typename _VSTD::iterator_traits<_BidirectionalIterator>::value_type value_type; 2456aca09de3SHoward Hinnant if (_VSTD::is_trivially_move_assignable<value_type>::value) 2457aca09de3SHoward Hinnant { 2458aca09de3SHoward Hinnant if (_VSTD::next(__first) == __middle) 2459aca09de3SHoward Hinnant return _VSTD::__rotate_left(__first, __last); 2460aca09de3SHoward Hinnant if (_VSTD::next(__middle) == __last) 2461aca09de3SHoward Hinnant return _VSTD::__rotate_right(__first, __last); 2462aca09de3SHoward Hinnant } 2463aca09de3SHoward Hinnant return _VSTD::__rotate_forward(__first, __middle, __last); 2464aca09de3SHoward Hinnant} 2465aca09de3SHoward Hinnant 2466aca09de3SHoward Hinnanttemplate <class _RandomAccessIterator> 2467aca09de3SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 2468aca09de3SHoward Hinnant_RandomAccessIterator 2469aca09de3SHoward Hinnant__rotate(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, 2470aca09de3SHoward Hinnant _VSTD::random_access_iterator_tag) 2471aca09de3SHoward Hinnant{ 2472aca09de3SHoward Hinnant typedef typename _VSTD::iterator_traits<_RandomAccessIterator>::value_type value_type; 2473aca09de3SHoward Hinnant if (_VSTD::is_trivially_move_assignable<value_type>::value) 2474aca09de3SHoward Hinnant { 2475aca09de3SHoward Hinnant if (_VSTD::next(__first) == __middle) 2476aca09de3SHoward Hinnant return _VSTD::__rotate_left(__first, __last); 2477aca09de3SHoward Hinnant if (_VSTD::next(__middle) == __last) 2478aca09de3SHoward Hinnant return _VSTD::__rotate_right(__first, __last); 2479aca09de3SHoward Hinnant return _VSTD::__rotate_gcd(__first, __middle, __last); 2480aca09de3SHoward Hinnant } 2481aca09de3SHoward Hinnant return _VSTD::__rotate_forward(__first, __middle, __last); 2482aca09de3SHoward Hinnant} 2483aca09de3SHoward Hinnant 2484aca09de3SHoward Hinnanttemplate <class _ForwardIterator> 2485aca09de3SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 2486aca09de3SHoward Hinnant_ForwardIterator 24873e519524SHoward Hinnantrotate(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last) 24883e519524SHoward Hinnant{ 2489aca09de3SHoward Hinnant if (__first == __middle) 2490aca09de3SHoward Hinnant return __last; 2491aca09de3SHoward Hinnant if (__middle == __last) 2492aca09de3SHoward Hinnant return __first; 2493ce48a113SHoward Hinnant return _VSTD::__rotate(__first, __middle, __last, 2494aca09de3SHoward Hinnant typename _VSTD::iterator_traits<_ForwardIterator>::iterator_category()); 24953e519524SHoward Hinnant} 24963e519524SHoward Hinnant 24973e519524SHoward Hinnant// rotate_copy 24983e519524SHoward Hinnant 24993e519524SHoward Hinnanttemplate <class _ForwardIterator, class _OutputIterator> 25003e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 25013e519524SHoward Hinnant_OutputIterator 25023e519524SHoward Hinnantrotate_copy(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterator __last, _OutputIterator __result) 25033e519524SHoward Hinnant{ 2504ce48a113SHoward Hinnant return _VSTD::copy(__first, __middle, _VSTD::copy(__middle, __last, __result)); 25053e519524SHoward Hinnant} 25063e519524SHoward Hinnant 25073e519524SHoward Hinnant// min_element 25083e519524SHoward Hinnant 25093e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Compare> 25109d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25113e519524SHoward Hinnant_ForwardIterator 25120b0671aeSMarshall Clowmin_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 25133e519524SHoward Hinnant{ 25143e519524SHoward Hinnant if (__first != __last) 25153e519524SHoward Hinnant { 25163e519524SHoward Hinnant _ForwardIterator __i = __first; 25173e519524SHoward Hinnant while (++__i != __last) 25183e519524SHoward Hinnant if (__comp(*__i, *__first)) 25193e519524SHoward Hinnant __first = __i; 25203e519524SHoward Hinnant } 25213e519524SHoward Hinnant return __first; 25223e519524SHoward Hinnant} 25233e519524SHoward Hinnant 25243e519524SHoward Hinnanttemplate <class _ForwardIterator> 25250b0671aeSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25263e519524SHoward Hinnant_ForwardIterator 25273e519524SHoward Hinnantmin_element(_ForwardIterator __first, _ForwardIterator __last) 25283e519524SHoward Hinnant{ 25290b0671aeSMarshall Clow return _VSTD::min_element(__first, __last, 25304eb27b79SHoward Hinnant __less<typename iterator_traits<_ForwardIterator>::value_type>()); 25314eb27b79SHoward Hinnant} 25324eb27b79SHoward Hinnant 25334eb27b79SHoward Hinnant// min 25344eb27b79SHoward Hinnant 25354eb27b79SHoward Hinnanttemplate <class _Tp, class _Compare> 25369d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25374eb27b79SHoward Hinnantconst _Tp& 25384eb27b79SHoward Hinnantmin(const _Tp& __a, const _Tp& __b, _Compare __comp) 25394eb27b79SHoward Hinnant{ 25404eb27b79SHoward Hinnant return __comp(__b, __a) ? __b : __a; 25414eb27b79SHoward Hinnant} 25424eb27b79SHoward Hinnant 25434eb27b79SHoward Hinnanttemplate <class _Tp> 25449d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25454eb27b79SHoward Hinnantconst _Tp& 25464eb27b79SHoward Hinnantmin(const _Tp& __a, const _Tp& __b) 25474eb27b79SHoward Hinnant{ 2548ce48a113SHoward Hinnant return _VSTD::min(__a, __b, __less<_Tp>()); 25494eb27b79SHoward Hinnant} 25504eb27b79SHoward Hinnant 255154976f26SHoward Hinnant#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 255254976f26SHoward Hinnant 25534eb27b79SHoward Hinnanttemplate<class _Tp, class _Compare> 25549d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25554eb27b79SHoward Hinnant_Tp 25564eb27b79SHoward Hinnantmin(initializer_list<_Tp> __t, _Compare __comp) 25574eb27b79SHoward Hinnant{ 25580b0671aeSMarshall Clow return *_VSTD::min_element(__t.begin(), __t.end(), __comp); 25594eb27b79SHoward Hinnant} 25604eb27b79SHoward Hinnant 25614eb27b79SHoward Hinnanttemplate<class _Tp> 25629d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25634eb27b79SHoward Hinnant_Tp 25644eb27b79SHoward Hinnantmin(initializer_list<_Tp> __t) 25654eb27b79SHoward Hinnant{ 25660b0671aeSMarshall Clow return *_VSTD::min_element(__t.begin(), __t.end(), __less<_Tp>()); 25673e519524SHoward Hinnant} 25683e519524SHoward Hinnant 256954976f26SHoward Hinnant#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 257054976f26SHoward Hinnant 25713e519524SHoward Hinnant// max_element 25723e519524SHoward Hinnant 25733e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Compare> 25749d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25753e519524SHoward Hinnant_ForwardIterator 25760b0671aeSMarshall Clowmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 25773e519524SHoward Hinnant{ 25783e519524SHoward Hinnant if (__first != __last) 25793e519524SHoward Hinnant { 25803e519524SHoward Hinnant _ForwardIterator __i = __first; 25813e519524SHoward Hinnant while (++__i != __last) 25823e519524SHoward Hinnant if (__comp(*__first, *__i)) 25833e519524SHoward Hinnant __first = __i; 25843e519524SHoward Hinnant } 25853e519524SHoward Hinnant return __first; 25863e519524SHoward Hinnant} 25873e519524SHoward Hinnant 25889d67c6d5SMarshall Clow 25893e519524SHoward Hinnanttemplate <class _ForwardIterator> 25900b0671aeSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 25913e519524SHoward Hinnant_ForwardIterator 25923e519524SHoward Hinnantmax_element(_ForwardIterator __first, _ForwardIterator __last) 25933e519524SHoward Hinnant{ 25940b0671aeSMarshall Clow return _VSTD::max_element(__first, __last, 25954eb27b79SHoward Hinnant __less<typename iterator_traits<_ForwardIterator>::value_type>()); 25964eb27b79SHoward Hinnant} 25974eb27b79SHoward Hinnant 25984eb27b79SHoward Hinnant// max 25994eb27b79SHoward Hinnant 26004eb27b79SHoward Hinnanttemplate <class _Tp, class _Compare> 26019d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 26024eb27b79SHoward Hinnantconst _Tp& 26034eb27b79SHoward Hinnantmax(const _Tp& __a, const _Tp& __b, _Compare __comp) 26044eb27b79SHoward Hinnant{ 26054eb27b79SHoward Hinnant return __comp(__a, __b) ? __b : __a; 26064eb27b79SHoward Hinnant} 26074eb27b79SHoward Hinnant 26084eb27b79SHoward Hinnanttemplate <class _Tp> 26099d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 26104eb27b79SHoward Hinnantconst _Tp& 26114eb27b79SHoward Hinnantmax(const _Tp& __a, const _Tp& __b) 26124eb27b79SHoward Hinnant{ 2613ce48a113SHoward Hinnant return _VSTD::max(__a, __b, __less<_Tp>()); 26144eb27b79SHoward Hinnant} 26154eb27b79SHoward Hinnant 261654976f26SHoward Hinnant#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 261754976f26SHoward Hinnant 26184eb27b79SHoward Hinnanttemplate<class _Tp, class _Compare> 26199d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 26204eb27b79SHoward Hinnant_Tp 26214eb27b79SHoward Hinnantmax(initializer_list<_Tp> __t, _Compare __comp) 26224eb27b79SHoward Hinnant{ 26230b0671aeSMarshall Clow return *_VSTD::max_element(__t.begin(), __t.end(), __comp); 26244eb27b79SHoward Hinnant} 26254eb27b79SHoward Hinnant 26264eb27b79SHoward Hinnanttemplate<class _Tp> 26279d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 26284eb27b79SHoward Hinnant_Tp 26294eb27b79SHoward Hinnantmax(initializer_list<_Tp> __t) 26304eb27b79SHoward Hinnant{ 26310b0671aeSMarshall Clow return *_VSTD::max_element(__t.begin(), __t.end(), __less<_Tp>()); 26323e519524SHoward Hinnant} 26333e519524SHoward Hinnant 263454976f26SHoward Hinnant#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 263554976f26SHoward Hinnant 2636146c14acSMarshall Clow#if _LIBCPP_STD_VER > 14 2637146c14acSMarshall Clow// clamp 2638146c14acSMarshall Clowtemplate<class _Tp, class _Compare> 2639146c14acSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2640146c14acSMarshall Clowconst _Tp& 2641146c14acSMarshall Clowclamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi, _Compare __comp) 2642146c14acSMarshall Clow{ 2643146c14acSMarshall Clow _LIBCPP_ASSERT(!__comp(__hi, __lo), "Bad bounds passed to std::clamp"); 2644146c14acSMarshall Clow return __comp(__v, __lo) ? __lo : __comp(__hi, __v) ? __hi : __v; 2645146c14acSMarshall Clow 2646146c14acSMarshall Clow} 2647146c14acSMarshall Clow 2648146c14acSMarshall Clowtemplate<class _Tp> 2649146c14acSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2650146c14acSMarshall Clowconst _Tp& 2651146c14acSMarshall Clowclamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi) 2652146c14acSMarshall Clow{ 2653146c14acSMarshall Clow return _VSTD::clamp(__v, __lo, __hi, __less<_Tp>()); 2654146c14acSMarshall Clow} 2655146c14acSMarshall Clow#endif 2656146c14acSMarshall Clow 26573e519524SHoward Hinnant// minmax_element 26583e519524SHoward Hinnant 26593e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Compare> 26600b0671aeSMarshall Clow_LIBCPP_CONSTEXPR_AFTER_CXX11 26613e519524SHoward Hinnantstd::pair<_ForwardIterator, _ForwardIterator> 26623e519524SHoward Hinnantminmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 26633e519524SHoward Hinnant{ 26643e519524SHoward Hinnant std::pair<_ForwardIterator, _ForwardIterator> __result(__first, __first); 26653e519524SHoward Hinnant if (__first != __last) 26663e519524SHoward Hinnant { 26673e519524SHoward Hinnant if (++__first != __last) 26683e519524SHoward Hinnant { 26693e519524SHoward Hinnant if (__comp(*__first, *__result.first)) 26703e519524SHoward Hinnant __result.first = __first; 26713e519524SHoward Hinnant else 26723e519524SHoward Hinnant __result.second = __first; 26733e519524SHoward Hinnant while (++__first != __last) 26743e519524SHoward Hinnant { 26753e519524SHoward Hinnant _ForwardIterator __i = __first; 26763e519524SHoward Hinnant if (++__first == __last) 26773e519524SHoward Hinnant { 26783e519524SHoward Hinnant if (__comp(*__i, *__result.first)) 26793e519524SHoward Hinnant __result.first = __i; 26803e519524SHoward Hinnant else if (!__comp(*__i, *__result.second)) 26813e519524SHoward Hinnant __result.second = __i; 26823e519524SHoward Hinnant break; 26833e519524SHoward Hinnant } 26843e519524SHoward Hinnant else 26853e519524SHoward Hinnant { 26863e519524SHoward Hinnant if (__comp(*__first, *__i)) 26873e519524SHoward Hinnant { 26883e519524SHoward Hinnant if (__comp(*__first, *__result.first)) 26893e519524SHoward Hinnant __result.first = __first; 26903e519524SHoward Hinnant if (!__comp(*__i, *__result.second)) 26913e519524SHoward Hinnant __result.second = __i; 26923e519524SHoward Hinnant } 26933e519524SHoward Hinnant else 26943e519524SHoward Hinnant { 26953e519524SHoward Hinnant if (__comp(*__i, *__result.first)) 26963e519524SHoward Hinnant __result.first = __i; 26973e519524SHoward Hinnant if (!__comp(*__first, *__result.second)) 26983e519524SHoward Hinnant __result.second = __first; 26993e519524SHoward Hinnant } 27003e519524SHoward Hinnant } 27013e519524SHoward Hinnant } 27023e519524SHoward Hinnant } 27033e519524SHoward Hinnant } 27043e519524SHoward Hinnant return __result; 27053e519524SHoward Hinnant} 27063e519524SHoward Hinnant 27073e519524SHoward Hinnanttemplate <class _ForwardIterator> 27080b0671aeSMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 27093e519524SHoward Hinnantstd::pair<_ForwardIterator, _ForwardIterator> 27103e519524SHoward Hinnantminmax_element(_ForwardIterator __first, _ForwardIterator __last) 27113e519524SHoward Hinnant{ 27129d67c6d5SMarshall Clow return _VSTD::minmax_element(__first, __last, 27139d67c6d5SMarshall Clow __less<typename iterator_traits<_ForwardIterator>::value_type>()); 27143e519524SHoward Hinnant} 27153e519524SHoward Hinnant 27164eb27b79SHoward Hinnant// minmax 27174eb27b79SHoward Hinnant 27184eb27b79SHoward Hinnanttemplate<class _Tp, class _Compare> 27199d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 27204eb27b79SHoward Hinnantpair<const _Tp&, const _Tp&> 27214eb27b79SHoward Hinnantminmax(const _Tp& __a, const _Tp& __b, _Compare __comp) 27224eb27b79SHoward Hinnant{ 27234eb27b79SHoward Hinnant return __comp(__b, __a) ? pair<const _Tp&, const _Tp&>(__b, __a) : 27244eb27b79SHoward Hinnant pair<const _Tp&, const _Tp&>(__a, __b); 27254eb27b79SHoward Hinnant} 27264eb27b79SHoward Hinnant 27274eb27b79SHoward Hinnanttemplate<class _Tp> 27289d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 27294eb27b79SHoward Hinnantpair<const _Tp&, const _Tp&> 27304eb27b79SHoward Hinnantminmax(const _Tp& __a, const _Tp& __b) 27314eb27b79SHoward Hinnant{ 2732ce48a113SHoward Hinnant return _VSTD::minmax(__a, __b, __less<_Tp>()); 27334eb27b79SHoward Hinnant} 27344eb27b79SHoward Hinnant 273554976f26SHoward Hinnant#ifndef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 273654976f26SHoward Hinnant 27374eb27b79SHoward Hinnanttemplate<class _Tp, class _Compare> 27389d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 27394eb27b79SHoward Hinnantpair<_Tp, _Tp> 27404eb27b79SHoward Hinnantminmax(initializer_list<_Tp> __t, _Compare __comp) 27414eb27b79SHoward Hinnant{ 27429d67c6d5SMarshall Clow typedef typename initializer_list<_Tp>::const_iterator _Iter; 27439d67c6d5SMarshall Clow _Iter __first = __t.begin(); 27449d67c6d5SMarshall Clow _Iter __last = __t.end(); 27459d67c6d5SMarshall Clow std::pair<_Tp, _Tp> __result(*__first, *__first); 27469d67c6d5SMarshall Clow 27479d67c6d5SMarshall Clow ++__first; 27489d67c6d5SMarshall Clow if (__t.size() % 2 == 0) 27499d67c6d5SMarshall Clow { 27509d67c6d5SMarshall Clow if (__comp(*__first, __result.first)) 27519d67c6d5SMarshall Clow __result.first = *__first; 27529d67c6d5SMarshall Clow else 27539d67c6d5SMarshall Clow __result.second = *__first; 27549d67c6d5SMarshall Clow ++__first; 27559d67c6d5SMarshall Clow } 27569d67c6d5SMarshall Clow 27579d67c6d5SMarshall Clow while (__first != __last) 27589d67c6d5SMarshall Clow { 27599d67c6d5SMarshall Clow _Tp __prev = *__first++; 2760002144f6SMarshall Clow if (__comp(*__first, __prev)) { 2761002144f6SMarshall Clow if ( __comp(*__first, __result.first)) __result.first = *__first; 2762002144f6SMarshall Clow if (!__comp(__prev, __result.second)) __result.second = __prev; 27639d67c6d5SMarshall Clow } 27649d67c6d5SMarshall Clow else { 2765002144f6SMarshall Clow if ( __comp(__prev, __result.first)) __result.first = __prev; 2766002144f6SMarshall Clow if (!__comp(*__first, __result.second)) __result.second = *__first; 27679d67c6d5SMarshall Clow } 27689d67c6d5SMarshall Clow 27699d67c6d5SMarshall Clow __first++; 27709d67c6d5SMarshall Clow } 27719d67c6d5SMarshall Clow return __result; 27729d67c6d5SMarshall Clow} 27739d67c6d5SMarshall Clow 27749d67c6d5SMarshall Clowtemplate<class _Tp> 27759d67c6d5SMarshall Clowinline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 27769d67c6d5SMarshall Clowpair<_Tp, _Tp> 27779d67c6d5SMarshall Clowminmax(initializer_list<_Tp> __t) 27789d67c6d5SMarshall Clow{ 27799d67c6d5SMarshall Clow return _VSTD::minmax(__t, __less<_Tp>()); 27804eb27b79SHoward Hinnant} 27814eb27b79SHoward Hinnant 278254976f26SHoward Hinnant#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS 278354976f26SHoward Hinnant 27843e519524SHoward Hinnant// random_shuffle 27853e519524SHoward Hinnant 2786f9d540b0SHoward Hinnant// __independent_bits_engine 2787f9d540b0SHoward Hinnant 2788c003db1fSHoward Hinnanttemplate <unsigned long long _Xp, size_t _Rp> 2789f9d540b0SHoward Hinnantstruct __log2_imp 27903e519524SHoward Hinnant{ 2791c003db1fSHoward Hinnant static const size_t value = _Xp & ((unsigned long long)(1) << _Rp) ? _Rp 2792c003db1fSHoward Hinnant : __log2_imp<_Xp, _Rp - 1>::value; 27933e519524SHoward Hinnant}; 27943e519524SHoward Hinnant 2795c003db1fSHoward Hinnanttemplate <unsigned long long _Xp> 2796c003db1fSHoward Hinnantstruct __log2_imp<_Xp, 0> 27973e519524SHoward Hinnant{ 2798f9d540b0SHoward Hinnant static const size_t value = 0; 27993e519524SHoward Hinnant}; 28003e519524SHoward Hinnant 2801c003db1fSHoward Hinnanttemplate <size_t _Rp> 2802c003db1fSHoward Hinnantstruct __log2_imp<0, _Rp> 28033e519524SHoward Hinnant{ 2804c003db1fSHoward Hinnant static const size_t value = _Rp + 1; 28053e519524SHoward Hinnant}; 28063e519524SHoward Hinnant 2807c003db1fSHoward Hinnanttemplate <class _UI, _UI _Xp> 2808f9d540b0SHoward Hinnantstruct __log2 28093e519524SHoward Hinnant{ 2810c003db1fSHoward Hinnant static const size_t value = __log2_imp<_Xp, 2811f9d540b0SHoward Hinnant sizeof(_UI) * __CHAR_BIT__ - 1>::value; 28123e519524SHoward Hinnant}; 28133e519524SHoward Hinnant 2814f9d540b0SHoward Hinnanttemplate<class _Engine, class _UIntType> 2815f9d540b0SHoward Hinnantclass __independent_bits_engine 28163e519524SHoward Hinnant{ 2817f9d540b0SHoward Hinnantpublic: 2818f9d540b0SHoward Hinnant // types 2819f9d540b0SHoward Hinnant typedef _UIntType result_type; 2820f9d540b0SHoward Hinnant 2821f9d540b0SHoward Hinnantprivate: 2822f9d540b0SHoward Hinnant typedef typename _Engine::result_type _Engine_result_type; 2823f9d540b0SHoward Hinnant typedef typename conditional 2824f9d540b0SHoward Hinnant < 2825f9d540b0SHoward Hinnant sizeof(_Engine_result_type) <= sizeof(result_type), 2826f9d540b0SHoward Hinnant result_type, 2827f9d540b0SHoward Hinnant _Engine_result_type 2828f9d540b0SHoward Hinnant >::type _Working_result_type; 2829f9d540b0SHoward Hinnant 2830f9d540b0SHoward Hinnant _Engine& __e_; 2831f9d540b0SHoward Hinnant size_t __w_; 2832f9d540b0SHoward Hinnant size_t __w0_; 2833f9d540b0SHoward Hinnant size_t __n_; 2834f9d540b0SHoward Hinnant size_t __n0_; 2835f9d540b0SHoward Hinnant _Working_result_type __y0_; 2836f9d540b0SHoward Hinnant _Working_result_type __y1_; 2837f9d540b0SHoward Hinnant _Engine_result_type __mask0_; 2838f9d540b0SHoward Hinnant _Engine_result_type __mask1_; 2839f9d540b0SHoward Hinnant 2840e386b7b3SHoward Hinnant#ifdef _LIBCPP_HAS_NO_CONSTEXPR 2841c003db1fSHoward Hinnant static const _Working_result_type _Rp = _Engine::_Max - _Engine::_Min 2842f9d540b0SHoward Hinnant + _Working_result_type(1); 2843e386b7b3SHoward Hinnant#else 2844e386b7b3SHoward Hinnant static _LIBCPP_CONSTEXPR const _Working_result_type _Rp = _Engine::max() - _Engine::min() 2845e386b7b3SHoward Hinnant + _Working_result_type(1); 2846e386b7b3SHoward Hinnant#endif 2847e386b7b3SHoward Hinnant static _LIBCPP_CONSTEXPR const size_t __m = __log2<_Working_result_type, _Rp>::value; 2848e386b7b3SHoward Hinnant static _LIBCPP_CONSTEXPR const size_t _WDt = numeric_limits<_Working_result_type>::digits; 2849e386b7b3SHoward Hinnant static _LIBCPP_CONSTEXPR const size_t _EDt = numeric_limits<_Engine_result_type>::digits; 2850f9d540b0SHoward Hinnant 2851f9d540b0SHoward Hinnantpublic: 2852f9d540b0SHoward Hinnant // constructors and seeding functions 2853f9d540b0SHoward Hinnant __independent_bits_engine(_Engine& __e, size_t __w); 2854f9d540b0SHoward Hinnant 2855f9d540b0SHoward Hinnant // generating functions 2856c003db1fSHoward Hinnant result_type operator()() {return __eval(integral_constant<bool, _Rp != 0>());} 2857f9d540b0SHoward Hinnant 2858f9d540b0SHoward Hinnantprivate: 2859f9d540b0SHoward Hinnant result_type __eval(false_type); 2860f9d540b0SHoward Hinnant result_type __eval(true_type); 2861f9d540b0SHoward Hinnant}; 2862f9d540b0SHoward Hinnant 2863f9d540b0SHoward Hinnanttemplate<class _Engine, class _UIntType> 2864f9d540b0SHoward Hinnant__independent_bits_engine<_Engine, _UIntType> 2865f9d540b0SHoward Hinnant ::__independent_bits_engine(_Engine& __e, size_t __w) 2866f9d540b0SHoward Hinnant : __e_(__e), 2867f9d540b0SHoward Hinnant __w_(__w) 2868f9d540b0SHoward Hinnant{ 2869f9d540b0SHoward Hinnant __n_ = __w_ / __m + (__w_ % __m != 0); 2870f9d540b0SHoward Hinnant __w0_ = __w_ / __n_; 2871c003db1fSHoward Hinnant if (_Rp == 0) 2872c003db1fSHoward Hinnant __y0_ = _Rp; 2873f9d540b0SHoward Hinnant else if (__w0_ < _WDt) 2874c003db1fSHoward Hinnant __y0_ = (_Rp >> __w0_) << __w0_; 2875f9d540b0SHoward Hinnant else 2876f9d540b0SHoward Hinnant __y0_ = 0; 2877c003db1fSHoward Hinnant if (_Rp - __y0_ > __y0_ / __n_) 2878f9d540b0SHoward Hinnant { 2879f9d540b0SHoward Hinnant ++__n_; 2880f9d540b0SHoward Hinnant __w0_ = __w_ / __n_; 2881f9d540b0SHoward Hinnant if (__w0_ < _WDt) 2882c003db1fSHoward Hinnant __y0_ = (_Rp >> __w0_) << __w0_; 2883f9d540b0SHoward Hinnant else 2884f9d540b0SHoward Hinnant __y0_ = 0; 2885f9d540b0SHoward Hinnant } 2886f9d540b0SHoward Hinnant __n0_ = __n_ - __w_ % __n_; 2887f9d540b0SHoward Hinnant if (__w0_ < _WDt - 1) 2888c003db1fSHoward Hinnant __y1_ = (_Rp >> (__w0_ + 1)) << (__w0_ + 1); 2889f9d540b0SHoward Hinnant else 2890f9d540b0SHoward Hinnant __y1_ = 0; 2891f9d540b0SHoward Hinnant __mask0_ = __w0_ > 0 ? _Engine_result_type(~0) >> (_EDt - __w0_) : 2892f9d540b0SHoward Hinnant _Engine_result_type(0); 2893f9d540b0SHoward Hinnant __mask1_ = __w0_ < _EDt - 1 ? 2894f9d540b0SHoward Hinnant _Engine_result_type(~0) >> (_EDt - (__w0_ + 1)) : 2895f9d540b0SHoward Hinnant _Engine_result_type(~0); 28963e519524SHoward Hinnant} 28973e519524SHoward Hinnant 2898f9d540b0SHoward Hinnanttemplate<class _Engine, class _UIntType> 2899f9d540b0SHoward Hinnantinline 2900f9d540b0SHoward Hinnant_UIntType 2901f9d540b0SHoward Hinnant__independent_bits_engine<_Engine, _UIntType>::__eval(false_type) 29023e519524SHoward Hinnant{ 2903f9d540b0SHoward Hinnant return static_cast<result_type>(__e_() & __mask0_); 29043e519524SHoward Hinnant} 29053e519524SHoward Hinnant 2906f9d540b0SHoward Hinnanttemplate<class _Engine, class _UIntType> 2907f9d540b0SHoward Hinnant_UIntType 2908f9d540b0SHoward Hinnant__independent_bits_engine<_Engine, _UIntType>::__eval(true_type) 29093e519524SHoward Hinnant{ 2910c003db1fSHoward Hinnant result_type _Sp = 0; 2911f9d540b0SHoward Hinnant for (size_t __k = 0; __k < __n0_; ++__k) 2912f9d540b0SHoward Hinnant { 2913f9d540b0SHoward Hinnant _Engine_result_type __u; 29143e519524SHoward Hinnant do 2915f9d540b0SHoward Hinnant { 2916f9d540b0SHoward Hinnant __u = __e_() - _Engine::min(); 2917f9d540b0SHoward Hinnant } while (__u >= __y0_); 29180176bc6cSHoward Hinnant if (__w0_ < _WDt) 2919c003db1fSHoward Hinnant _Sp <<= __w0_; 2920f9d540b0SHoward Hinnant else 2921c003db1fSHoward Hinnant _Sp = 0; 2922c003db1fSHoward Hinnant _Sp += __u & __mask0_; 2923f9d540b0SHoward Hinnant } 2924f9d540b0SHoward Hinnant for (size_t __k = __n0_; __k < __n_; ++__k) 2925f9d540b0SHoward Hinnant { 2926f9d540b0SHoward Hinnant _Engine_result_type __u; 2927f9d540b0SHoward Hinnant do 2928f9d540b0SHoward Hinnant { 2929f9d540b0SHoward Hinnant __u = __e_() - _Engine::min(); 2930f9d540b0SHoward Hinnant } while (__u >= __y1_); 29310176bc6cSHoward Hinnant if (__w0_ < _WDt - 1) 2932c003db1fSHoward Hinnant _Sp <<= __w0_ + 1; 2933f9d540b0SHoward Hinnant else 2934c003db1fSHoward Hinnant _Sp = 0; 2935c003db1fSHoward Hinnant _Sp += __u & __mask1_; 2936f9d540b0SHoward Hinnant } 2937c003db1fSHoward Hinnant return _Sp; 29383e519524SHoward Hinnant} 29393e519524SHoward Hinnant 2940f9d540b0SHoward Hinnant// uniform_int_distribution 29413e519524SHoward Hinnant 2942f9d540b0SHoward Hinnanttemplate<class _IntType = int> 2943f9d540b0SHoward Hinnantclass uniform_int_distribution 29443e519524SHoward Hinnant{ 2945f9d540b0SHoward Hinnantpublic: 2946f9d540b0SHoward Hinnant // types 2947f9d540b0SHoward Hinnant typedef _IntType result_type; 2948f9d540b0SHoward Hinnant 2949f9d540b0SHoward Hinnant class param_type 2950f9d540b0SHoward Hinnant { 2951f9d540b0SHoward Hinnant result_type __a_; 2952f9d540b0SHoward Hinnant result_type __b_; 2953f9d540b0SHoward Hinnant public: 2954f9d540b0SHoward Hinnant typedef uniform_int_distribution distribution_type; 2955f9d540b0SHoward Hinnant 2956f9d540b0SHoward Hinnant explicit param_type(result_type __a = 0, 2957f9d540b0SHoward Hinnant result_type __b = numeric_limits<result_type>::max()) 2958f9d540b0SHoward Hinnant : __a_(__a), __b_(__b) {} 2959f9d540b0SHoward Hinnant 2960f9d540b0SHoward Hinnant result_type a() const {return __a_;} 2961f9d540b0SHoward Hinnant result_type b() const {return __b_;} 2962f9d540b0SHoward Hinnant 2963f9d540b0SHoward Hinnant friend bool operator==(const param_type& __x, const param_type& __y) 2964f9d540b0SHoward Hinnant {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 2965f9d540b0SHoward Hinnant friend bool operator!=(const param_type& __x, const param_type& __y) 2966f9d540b0SHoward Hinnant {return !(__x == __y);} 29673e519524SHoward Hinnant }; 29683e519524SHoward Hinnant 2969f9d540b0SHoward Hinnantprivate: 2970f9d540b0SHoward Hinnant param_type __p_; 29713e519524SHoward Hinnant 2972f9d540b0SHoward Hinnantpublic: 2973f9d540b0SHoward Hinnant // constructors and reset functions 2974f9d540b0SHoward Hinnant explicit uniform_int_distribution(result_type __a = 0, 2975f9d540b0SHoward Hinnant result_type __b = numeric_limits<result_type>::max()) 2976f9d540b0SHoward Hinnant : __p_(param_type(__a, __b)) {} 2977f9d540b0SHoward Hinnant explicit uniform_int_distribution(const param_type& __p) : __p_(__p) {} 2978f9d540b0SHoward Hinnant void reset() {} 2979f9d540b0SHoward Hinnant 2980f9d540b0SHoward Hinnant // generating functions 2981f9d540b0SHoward Hinnant template<class _URNG> result_type operator()(_URNG& __g) 2982f9d540b0SHoward Hinnant {return (*this)(__g, __p_);} 2983f9d540b0SHoward Hinnant template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 2984f9d540b0SHoward Hinnant 2985f9d540b0SHoward Hinnant // property functions 2986f9d540b0SHoward Hinnant result_type a() const {return __p_.a();} 2987f9d540b0SHoward Hinnant result_type b() const {return __p_.b();} 2988f9d540b0SHoward Hinnant 2989f9d540b0SHoward Hinnant param_type param() const {return __p_;} 2990f9d540b0SHoward Hinnant void param(const param_type& __p) {__p_ = __p;} 2991f9d540b0SHoward Hinnant 2992f9d540b0SHoward Hinnant result_type min() const {return a();} 2993f9d540b0SHoward Hinnant result_type max() const {return b();} 2994f9d540b0SHoward Hinnant 2995f9d540b0SHoward Hinnant friend bool operator==(const uniform_int_distribution& __x, 2996f9d540b0SHoward Hinnant const uniform_int_distribution& __y) 2997f9d540b0SHoward Hinnant {return __x.__p_ == __y.__p_;} 2998f9d540b0SHoward Hinnant friend bool operator!=(const uniform_int_distribution& __x, 2999f9d540b0SHoward Hinnant const uniform_int_distribution& __y) 3000f9d540b0SHoward Hinnant {return !(__x == __y);} 30013e519524SHoward Hinnant}; 30023e519524SHoward Hinnant 3003f9d540b0SHoward Hinnanttemplate<class _IntType> 3004f9d540b0SHoward Hinnanttemplate<class _URNG> 3005f9d540b0SHoward Hinnanttypename uniform_int_distribution<_IntType>::result_type 3006f9d540b0SHoward Hinnantuniform_int_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p) 30073e519524SHoward Hinnant{ 3008f9d540b0SHoward Hinnant typedef typename conditional<sizeof(result_type) <= sizeof(uint32_t), 3009f9d540b0SHoward Hinnant uint32_t, uint64_t>::type _UIntType; 3010c003db1fSHoward Hinnant const _UIntType _Rp = __p.b() - __p.a() + _UIntType(1); 3011c003db1fSHoward Hinnant if (_Rp == 1) 3012f9d540b0SHoward Hinnant return __p.a(); 3013f9d540b0SHoward Hinnant const size_t _Dt = numeric_limits<_UIntType>::digits; 3014f9d540b0SHoward Hinnant typedef __independent_bits_engine<_URNG, _UIntType> _Eng; 3015c003db1fSHoward Hinnant if (_Rp == 0) 3016f9d540b0SHoward Hinnant return static_cast<result_type>(_Eng(__g, _Dt)()); 3017c003db1fSHoward Hinnant size_t __w = _Dt - __clz(_Rp) - 1; 3018a6438ca1SMarshall Clow if ((_Rp & (std::numeric_limits<_UIntType>::max() >> (_Dt - __w))) != 0) 3019f9d540b0SHoward Hinnant ++__w; 3020f9d540b0SHoward Hinnant _Eng __e(__g, __w); 3021f9d540b0SHoward Hinnant _UIntType __u; 3022f9d540b0SHoward Hinnant do 30233e519524SHoward Hinnant { 3024f9d540b0SHoward Hinnant __u = __e(); 3025c003db1fSHoward Hinnant } while (__u >= _Rp); 3026f9d540b0SHoward Hinnant return static_cast<result_type>(__u + __p.a()); 30273e519524SHoward Hinnant} 3028f9d540b0SHoward Hinnant 3029f0544c20SHoward Hinnantclass _LIBCPP_TYPE_VIS __rs_default; 3030f9d540b0SHoward Hinnant 3031f0544c20SHoward Hinnant_LIBCPP_FUNC_VIS __rs_default __rs_get(); 3032f9d540b0SHoward Hinnant 3033f0544c20SHoward Hinnantclass _LIBCPP_TYPE_VIS __rs_default 30343e519524SHoward Hinnant{ 3035f9d540b0SHoward Hinnant static unsigned __c_; 3036f9d540b0SHoward Hinnant 3037f9d540b0SHoward Hinnant __rs_default(); 3038f9d540b0SHoward Hinnantpublic: 3039b6e5f854SMarshall Clow typedef uint_fast32_t result_type; 3040f9d540b0SHoward Hinnant 3041f9d540b0SHoward Hinnant static const result_type _Min = 0; 3042f9d540b0SHoward Hinnant static const result_type _Max = 0xFFFFFFFF; 3043f9d540b0SHoward Hinnant 3044f9d540b0SHoward Hinnant __rs_default(const __rs_default&); 3045f9d540b0SHoward Hinnant ~__rs_default(); 3046f9d540b0SHoward Hinnant 3047f9d540b0SHoward Hinnant result_type operator()(); 3048f9d540b0SHoward Hinnant 3049788c9979SHoward Hinnant static _LIBCPP_CONSTEXPR result_type min() {return _Min;} 3050788c9979SHoward Hinnant static _LIBCPP_CONSTEXPR result_type max() {return _Max;} 3051f9d540b0SHoward Hinnant 3052f0544c20SHoward Hinnant friend _LIBCPP_FUNC_VIS __rs_default __rs_get(); 3053f9d540b0SHoward Hinnant}; 3054f9d540b0SHoward Hinnant 3055f0544c20SHoward Hinnant_LIBCPP_FUNC_VIS __rs_default __rs_get(); 30563e519524SHoward Hinnant 30573e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 30583e519524SHoward Hinnantvoid 30593e519524SHoward Hinnantrandom_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last) 30603e519524SHoward Hinnant{ 30613e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 3062c003db1fSHoward Hinnant typedef uniform_int_distribution<ptrdiff_t> _Dp; 3063c003db1fSHoward Hinnant typedef typename _Dp::param_type _Pp; 30643e519524SHoward Hinnant difference_type __d = __last - __first; 30653e519524SHoward Hinnant if (__d > 1) 30663e519524SHoward Hinnant { 3067c003db1fSHoward Hinnant _Dp __uid; 3068f9d540b0SHoward Hinnant __rs_default __g = __rs_get(); 3069f9d540b0SHoward Hinnant for (--__last, --__d; __first < __last; ++__first, --__d) 3070007b26beSHoward Hinnant { 3071c003db1fSHoward Hinnant difference_type __i = __uid(__g, _Pp(0, __d)); 3072007b26beSHoward Hinnant if (__i != difference_type(0)) 3073007b26beSHoward Hinnant swap(*__first, *(__first + __i)); 3074007b26beSHoward Hinnant } 30753e519524SHoward Hinnant } 30763e519524SHoward Hinnant} 30773e519524SHoward Hinnant 30783e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _RandomNumberGenerator> 30793e519524SHoward Hinnantvoid 30803e519524SHoward Hinnantrandom_shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, 30817609c9b6SHoward Hinnant#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 30823e519524SHoward Hinnant _RandomNumberGenerator&& __rand) 30833e519524SHoward Hinnant#else 30843e519524SHoward Hinnant _RandomNumberGenerator& __rand) 30853e519524SHoward Hinnant#endif 30863e519524SHoward Hinnant{ 30873e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 30883e519524SHoward Hinnant difference_type __d = __last - __first; 30893e519524SHoward Hinnant if (__d > 1) 30903e519524SHoward Hinnant { 30913e519524SHoward Hinnant for (--__last; __first < __last; ++__first, --__d) 3092007b26beSHoward Hinnant { 3093007b26beSHoward Hinnant difference_type __i = __rand(__d); 3094007b26beSHoward Hinnant swap(*__first, *(__first + __i)); 3095007b26beSHoward Hinnant } 30963e519524SHoward Hinnant } 30973e519524SHoward Hinnant} 30983e519524SHoward Hinnant 3099e7154709SEric Fiseliertemplate <class _PopulationIterator, class _SampleIterator, class _Distance, 3100e7154709SEric Fiselier class _UniformRandomNumberGenerator> 3101e7154709SEric Fiselier_LIBCPP_INLINE_VISIBILITY 3102e7154709SEric Fiselier_SampleIterator __sample(_PopulationIterator __first, 3103e7154709SEric Fiselier _PopulationIterator __last, _SampleIterator __out, 3104e7154709SEric Fiselier _Distance __n, 3105e7154709SEric Fiselier _UniformRandomNumberGenerator & __g, 3106e7154709SEric Fiselier input_iterator_tag) { 3107e7154709SEric Fiselier 3108e7154709SEric Fiselier _Distance __k = 0; 3109e7154709SEric Fiselier for (; __first != __last && __k < __n; ++__first, (void)++__k) 3110e7154709SEric Fiselier __out[__k] = *__first; 3111e7154709SEric Fiselier _Distance __sz = __k; 3112e7154709SEric Fiselier for (; __first != __last; ++__first, (void)++__k) { 3113e7154709SEric Fiselier _Distance __r = _VSTD::uniform_int_distribution<_Distance>(0, __k)(__g); 3114e7154709SEric Fiselier if (__r < __sz) 3115e7154709SEric Fiselier __out[__r] = *__first; 3116e7154709SEric Fiselier } 3117e7154709SEric Fiselier return __out + _VSTD::min(__n, __k); 3118e7154709SEric Fiselier} 3119e7154709SEric Fiselier 3120e7154709SEric Fiseliertemplate <class _PopulationIterator, class _SampleIterator, class _Distance, 3121e7154709SEric Fiselier class _UniformRandomNumberGenerator> 3122e7154709SEric Fiselier_LIBCPP_INLINE_VISIBILITY 3123e7154709SEric Fiselier_SampleIterator __sample(_PopulationIterator __first, 3124e7154709SEric Fiselier _PopulationIterator __last, _SampleIterator __out, 3125e7154709SEric Fiselier _Distance __n, 3126e7154709SEric Fiselier _UniformRandomNumberGenerator& __g, 3127e7154709SEric Fiselier forward_iterator_tag) { 3128e7154709SEric Fiselier _Distance __unsampled_sz = _VSTD::distance(__first, __last); 3129e7154709SEric Fiselier for (__n = _VSTD::min(__n, __unsampled_sz); __n != 0; ++__first) { 3130e7154709SEric Fiselier _Distance __r = 3131e7154709SEric Fiselier _VSTD::uniform_int_distribution<_Distance>(0, --__unsampled_sz)(__g); 3132e7154709SEric Fiselier if (__r < __n) { 3133e7154709SEric Fiselier *__out++ = *__first; 3134e7154709SEric Fiselier --__n; 3135e7154709SEric Fiselier } 3136e7154709SEric Fiselier } 3137e7154709SEric Fiselier return __out; 3138e7154709SEric Fiselier} 3139e7154709SEric Fiselier 3140e7154709SEric Fiseliertemplate <class _PopulationIterator, class _SampleIterator, class _Distance, 3141e7154709SEric Fiselier class _UniformRandomNumberGenerator> 3142e7154709SEric Fiselier_LIBCPP_INLINE_VISIBILITY 3143e7154709SEric Fiselier_SampleIterator __sample(_PopulationIterator __first, 3144e7154709SEric Fiselier _PopulationIterator __last, _SampleIterator __out, 3145e7154709SEric Fiselier _Distance __n, _UniformRandomNumberGenerator& __g) { 3146e7154709SEric Fiselier typedef typename iterator_traits<_PopulationIterator>::iterator_category 3147e7154709SEric Fiselier _PopCategory; 3148e7154709SEric Fiselier typedef typename iterator_traits<_PopulationIterator>::difference_type 3149e7154709SEric Fiselier _Difference; 3150e7154709SEric Fiselier static_assert(__is_forward_iterator<_PopulationIterator>::value || 3151e7154709SEric Fiselier __is_random_access_iterator<_SampleIterator>::value, 3152e7154709SEric Fiselier "SampleIterator must meet the requirements of RandomAccessIterator"); 3153e7154709SEric Fiselier typedef typename common_type<_Distance, _Difference>::type _CommonType; 3154e7154709SEric Fiselier _LIBCPP_ASSERT(__n >= 0, "N must be a positive number."); 3155e7154709SEric Fiselier return _VSTD::__sample( 3156e7154709SEric Fiselier __first, __last, __out, _CommonType(__n), 3157e7154709SEric Fiselier __g, _PopCategory()); 3158e7154709SEric Fiselier} 3159e7154709SEric Fiselier 3160e7154709SEric Fiselier#if _LIBCPP_STD_VER > 14 3161e7154709SEric Fiseliertemplate <class _PopulationIterator, class _SampleIterator, class _Distance, 3162e7154709SEric Fiselier class _UniformRandomNumberGenerator> 3163e7154709SEric Fiselierinline _LIBCPP_INLINE_VISIBILITY 3164e7154709SEric Fiselier_SampleIterator sample(_PopulationIterator __first, 3165e7154709SEric Fiselier _PopulationIterator __last, _SampleIterator __out, 3166e7154709SEric Fiselier _Distance __n, _UniformRandomNumberGenerator&& __g) { 3167e7154709SEric Fiselier return _VSTD::__sample(__first, __last, __out, __n, __g); 3168e7154709SEric Fiselier} 3169e7154709SEric Fiselier#endif // _LIBCPP_STD_VER > 14 3170e7154709SEric Fiselier 3171f9d540b0SHoward Hinnanttemplate<class _RandomAccessIterator, class _UniformRandomNumberGenerator> 3172f9d540b0SHoward Hinnant void shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last, 3173fb340102SHoward Hinnant#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3174fb340102SHoward Hinnant _UniformRandomNumberGenerator&& __g) 3175fb340102SHoward Hinnant#else 3176f9d540b0SHoward Hinnant _UniformRandomNumberGenerator& __g) 3177fb340102SHoward Hinnant#endif 3178f9d540b0SHoward Hinnant{ 3179f9d540b0SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 3180c003db1fSHoward Hinnant typedef uniform_int_distribution<ptrdiff_t> _Dp; 3181c003db1fSHoward Hinnant typedef typename _Dp::param_type _Pp; 3182f9d540b0SHoward Hinnant difference_type __d = __last - __first; 3183f9d540b0SHoward Hinnant if (__d > 1) 3184f9d540b0SHoward Hinnant { 3185c003db1fSHoward Hinnant _Dp __uid; 3186f9d540b0SHoward Hinnant for (--__last, --__d; __first < __last; ++__first, --__d) 3187007b26beSHoward Hinnant { 3188c003db1fSHoward Hinnant difference_type __i = __uid(__g, _Pp(0, __d)); 3189007b26beSHoward Hinnant if (__i != difference_type(0)) 3190007b26beSHoward Hinnant swap(*__first, *(__first + __i)); 3191007b26beSHoward Hinnant } 3192f9d540b0SHoward Hinnant } 3193f9d540b0SHoward Hinnant} 3194f9d540b0SHoward Hinnant 31953e519524SHoward Hinnanttemplate <class _InputIterator, class _Predicate> 31963e519524SHoward Hinnantbool 31973e519524SHoward Hinnantis_partitioned(_InputIterator __first, _InputIterator __last, _Predicate __pred) 31983e519524SHoward Hinnant{ 31993e519524SHoward Hinnant for (; __first != __last; ++__first) 32003e519524SHoward Hinnant if (!__pred(*__first)) 32013e519524SHoward Hinnant break; 3202b9595b79SMarshall Clow if ( __first == __last ) 3203b9595b79SMarshall Clow return true; 3204b9595b79SMarshall Clow ++__first; 32053e519524SHoward Hinnant for (; __first != __last; ++__first) 32063e519524SHoward Hinnant if (__pred(*__first)) 32073e519524SHoward Hinnant return false; 32083e519524SHoward Hinnant return true; 32093e519524SHoward Hinnant} 32103e519524SHoward Hinnant 32113e519524SHoward Hinnant// partition 32123e519524SHoward Hinnant 32133e519524SHoward Hinnanttemplate <class _Predicate, class _ForwardIterator> 32143e519524SHoward Hinnant_ForwardIterator 32153e519524SHoward Hinnant__partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, forward_iterator_tag) 32163e519524SHoward Hinnant{ 32173e519524SHoward Hinnant while (true) 32183e519524SHoward Hinnant { 32193e519524SHoward Hinnant if (__first == __last) 32203e519524SHoward Hinnant return __first; 32213e519524SHoward Hinnant if (!__pred(*__first)) 32223e519524SHoward Hinnant break; 32233e519524SHoward Hinnant ++__first; 32243e519524SHoward Hinnant } 32253e519524SHoward Hinnant for (_ForwardIterator __p = __first; ++__p != __last;) 32263e519524SHoward Hinnant { 32273e519524SHoward Hinnant if (__pred(*__p)) 32283e519524SHoward Hinnant { 32293e519524SHoward Hinnant swap(*__first, *__p); 32303e519524SHoward Hinnant ++__first; 32313e519524SHoward Hinnant } 32323e519524SHoward Hinnant } 32333e519524SHoward Hinnant return __first; 32343e519524SHoward Hinnant} 32353e519524SHoward Hinnant 32363e519524SHoward Hinnanttemplate <class _Predicate, class _BidirectionalIterator> 32373e519524SHoward Hinnant_BidirectionalIterator 32383e519524SHoward Hinnant__partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, 32393e519524SHoward Hinnant bidirectional_iterator_tag) 32403e519524SHoward Hinnant{ 32413e519524SHoward Hinnant while (true) 32423e519524SHoward Hinnant { 32433e519524SHoward Hinnant while (true) 32443e519524SHoward Hinnant { 32453e519524SHoward Hinnant if (__first == __last) 32463e519524SHoward Hinnant return __first; 32473e519524SHoward Hinnant if (!__pred(*__first)) 32483e519524SHoward Hinnant break; 32493e519524SHoward Hinnant ++__first; 32503e519524SHoward Hinnant } 32513e519524SHoward Hinnant do 32523e519524SHoward Hinnant { 32533e519524SHoward Hinnant if (__first == --__last) 32543e519524SHoward Hinnant return __first; 32553e519524SHoward Hinnant } while (!__pred(*__last)); 32563e519524SHoward Hinnant swap(*__first, *__last); 32573e519524SHoward Hinnant ++__first; 32583e519524SHoward Hinnant } 32593e519524SHoward Hinnant} 32603e519524SHoward Hinnant 32613e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Predicate> 32623e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 32633e519524SHoward Hinnant_ForwardIterator 32643e519524SHoward Hinnantpartition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 32653e519524SHoward Hinnant{ 3266ce48a113SHoward Hinnant return _VSTD::__partition<typename add_lvalue_reference<_Predicate>::type> 32673e519524SHoward Hinnant (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); 32683e519524SHoward Hinnant} 32693e519524SHoward Hinnant 32703e519524SHoward Hinnant// partition_copy 32713e519524SHoward Hinnant 32723e519524SHoward Hinnanttemplate <class _InputIterator, class _OutputIterator1, 32733e519524SHoward Hinnant class _OutputIterator2, class _Predicate> 32743e519524SHoward Hinnantpair<_OutputIterator1, _OutputIterator2> 32753e519524SHoward Hinnantpartition_copy(_InputIterator __first, _InputIterator __last, 32763e519524SHoward Hinnant _OutputIterator1 __out_true, _OutputIterator2 __out_false, 32773e519524SHoward Hinnant _Predicate __pred) 32783e519524SHoward Hinnant{ 32793e519524SHoward Hinnant for (; __first != __last; ++__first) 32803e519524SHoward Hinnant { 32813e519524SHoward Hinnant if (__pred(*__first)) 32823e519524SHoward Hinnant { 32833e519524SHoward Hinnant *__out_true = *__first; 32843e519524SHoward Hinnant ++__out_true; 32853e519524SHoward Hinnant } 32863e519524SHoward Hinnant else 32873e519524SHoward Hinnant { 32883e519524SHoward Hinnant *__out_false = *__first; 32893e519524SHoward Hinnant ++__out_false; 32903e519524SHoward Hinnant } 32913e519524SHoward Hinnant } 32923e519524SHoward Hinnant return pair<_OutputIterator1, _OutputIterator2>(__out_true, __out_false); 32933e519524SHoward Hinnant} 32943e519524SHoward Hinnant 32953e519524SHoward Hinnant// partition_point 32963e519524SHoward Hinnant 32973e519524SHoward Hinnanttemplate<class _ForwardIterator, class _Predicate> 32983e519524SHoward Hinnant_ForwardIterator 32993e519524SHoward Hinnantpartition_point(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 33003e519524SHoward Hinnant{ 33013e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 3302ce48a113SHoward Hinnant difference_type __len = _VSTD::distance(__first, __last); 33033e519524SHoward Hinnant while (__len != 0) 33043e519524SHoward Hinnant { 33053e519524SHoward Hinnant difference_type __l2 = __len / 2; 33063e519524SHoward Hinnant _ForwardIterator __m = __first; 3307ce48a113SHoward Hinnant _VSTD::advance(__m, __l2); 33083e519524SHoward Hinnant if (__pred(*__m)) 33093e519524SHoward Hinnant { 33103e519524SHoward Hinnant __first = ++__m; 33113e519524SHoward Hinnant __len -= __l2 + 1; 33123e519524SHoward Hinnant } 33133e519524SHoward Hinnant else 33143e519524SHoward Hinnant __len = __l2; 33153e519524SHoward Hinnant } 33163e519524SHoward Hinnant return __first; 33173e519524SHoward Hinnant} 33183e519524SHoward Hinnant 33193e519524SHoward Hinnant// stable_partition 33203e519524SHoward Hinnant 33213e519524SHoward Hinnanttemplate <class _Predicate, class _ForwardIterator, class _Distance, class _Pair> 33223e519524SHoward Hinnant_ForwardIterator 33233e519524SHoward Hinnant__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 33243e519524SHoward Hinnant _Distance __len, _Pair __p, forward_iterator_tag __fit) 33253e519524SHoward Hinnant{ 33263e519524SHoward Hinnant // *__first is known to be false 33273e519524SHoward Hinnant // __len >= 1 33283e519524SHoward Hinnant if (__len == 1) 33293e519524SHoward Hinnant return __first; 33303e519524SHoward Hinnant if (__len == 2) 33313e519524SHoward Hinnant { 33323e519524SHoward Hinnant _ForwardIterator __m = __first; 33333e519524SHoward Hinnant if (__pred(*++__m)) 33343e519524SHoward Hinnant { 33353e519524SHoward Hinnant swap(*__first, *__m); 33363e519524SHoward Hinnant return __m; 33373e519524SHoward Hinnant } 33383e519524SHoward Hinnant return __first; 33393e519524SHoward Hinnant } 33403e519524SHoward Hinnant if (__len <= __p.second) 33413e519524SHoward Hinnant { // The buffer is big enough to use 33423e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 33433e519524SHoward Hinnant __destruct_n __d(0); 33443e519524SHoward Hinnant unique_ptr<value_type, __destruct_n&> __h(__p.first, __d); 33453e519524SHoward Hinnant // Move the falses into the temporary buffer, and the trues to the front of the line 33463e519524SHoward Hinnant // Update __first to always point to the end of the trues 33473e519524SHoward Hinnant value_type* __t = __p.first; 3348ce48a113SHoward Hinnant ::new(__t) value_type(_VSTD::move(*__first)); 33493e519524SHoward Hinnant __d.__incr((value_type*)0); 33503e519524SHoward Hinnant ++__t; 33513e519524SHoward Hinnant _ForwardIterator __i = __first; 33523e519524SHoward Hinnant while (++__i != __last) 33533e519524SHoward Hinnant { 33543e519524SHoward Hinnant if (__pred(*__i)) 33553e519524SHoward Hinnant { 3356ce48a113SHoward Hinnant *__first = _VSTD::move(*__i); 33573e519524SHoward Hinnant ++__first; 33583e519524SHoward Hinnant } 33593e519524SHoward Hinnant else 33603e519524SHoward Hinnant { 3361ce48a113SHoward Hinnant ::new(__t) value_type(_VSTD::move(*__i)); 33623e519524SHoward Hinnant __d.__incr((value_type*)0); 33633e519524SHoward Hinnant ++__t; 33643e519524SHoward Hinnant } 33653e519524SHoward Hinnant } 33663e519524SHoward Hinnant // All trues now at start of range, all falses in buffer 33673e519524SHoward Hinnant // Move falses back into range, but don't mess up __first which points to first false 33683e519524SHoward Hinnant __i = __first; 33693e519524SHoward Hinnant for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, ++__i) 3370ce48a113SHoward Hinnant *__i = _VSTD::move(*__t2); 33713e519524SHoward Hinnant // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer 33723e519524SHoward Hinnant return __first; 33733e519524SHoward Hinnant } 33743e519524SHoward Hinnant // Else not enough buffer, do in place 33753e519524SHoward Hinnant // __len >= 3 33763e519524SHoward Hinnant _ForwardIterator __m = __first; 33773e519524SHoward Hinnant _Distance __len2 = __len / 2; // __len2 >= 2 3378ce48a113SHoward Hinnant _VSTD::advance(__m, __len2); 33793e519524SHoward Hinnant // recurse on [__first, __m), *__first know to be false 33803e519524SHoward Hinnant // F????????????????? 33813e519524SHoward Hinnant // f m l 33823e519524SHoward Hinnant typedef typename add_lvalue_reference<_Predicate>::type _PredRef; 33833e519524SHoward Hinnant _ForwardIterator __first_false = __stable_partition<_PredRef>(__first, __m, __pred, __len2, __p, __fit); 33843e519524SHoward Hinnant // TTTFFFFF?????????? 33853e519524SHoward Hinnant // f ff m l 33863e519524SHoward Hinnant // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true 33873e519524SHoward Hinnant _ForwardIterator __m1 = __m; 33883e519524SHoward Hinnant _ForwardIterator __second_false = __last; 33893e519524SHoward Hinnant _Distance __len_half = __len - __len2; 33903e519524SHoward Hinnant while (__pred(*__m1)) 33913e519524SHoward Hinnant { 33923e519524SHoward Hinnant if (++__m1 == __last) 33933e519524SHoward Hinnant goto __second_half_done; 33943e519524SHoward Hinnant --__len_half; 33953e519524SHoward Hinnant } 33963e519524SHoward Hinnant // TTTFFFFFTTTF?????? 33973e519524SHoward Hinnant // f ff m m1 l 33983e519524SHoward Hinnant __second_false = __stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __fit); 33993e519524SHoward Hinnant__second_half_done: 34003e519524SHoward Hinnant // TTTFFFFFTTTTTFFFFF 34013e519524SHoward Hinnant // f ff m sf l 3402ce48a113SHoward Hinnant return _VSTD::rotate(__first_false, __m, __second_false); 34033e519524SHoward Hinnant // TTTTTTTTFFFFFFFFFF 34043e519524SHoward Hinnant // | 34053e519524SHoward Hinnant} 34063e519524SHoward Hinnant 34073e519524SHoward Hinnantstruct __return_temporary_buffer 34083e519524SHoward Hinnant{ 34093e519524SHoward Hinnant template <class _Tp> 3410ce48a113SHoward Hinnant _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) const {_VSTD::return_temporary_buffer(__p);} 34113e519524SHoward Hinnant}; 34123e519524SHoward Hinnant 34133e519524SHoward Hinnanttemplate <class _Predicate, class _ForwardIterator> 34143e519524SHoward Hinnant_ForwardIterator 34153e519524SHoward Hinnant__stable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, 34163e519524SHoward Hinnant forward_iterator_tag) 34173e519524SHoward Hinnant{ 34183e519524SHoward Hinnant const unsigned __alloc_limit = 3; // might want to make this a function of trivial assignment 34193e519524SHoward Hinnant // Either prove all true and return __first or point to first false 34203e519524SHoward Hinnant while (true) 34213e519524SHoward Hinnant { 34223e519524SHoward Hinnant if (__first == __last) 34233e519524SHoward Hinnant return __first; 34243e519524SHoward Hinnant if (!__pred(*__first)) 34253e519524SHoward Hinnant break; 34263e519524SHoward Hinnant ++__first; 34273e519524SHoward Hinnant } 34283e519524SHoward Hinnant // We now have a reduced range [__first, __last) 34293e519524SHoward Hinnant // *__first is known to be false 34303e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 34313e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3432ce48a113SHoward Hinnant difference_type __len = _VSTD::distance(__first, __last); 34333e519524SHoward Hinnant pair<value_type*, ptrdiff_t> __p(0, 0); 34343e519524SHoward Hinnant unique_ptr<value_type, __return_temporary_buffer> __h; 34353e519524SHoward Hinnant if (__len >= __alloc_limit) 34363e519524SHoward Hinnant { 3437ce48a113SHoward Hinnant __p = _VSTD::get_temporary_buffer<value_type>(__len); 34383e519524SHoward Hinnant __h.reset(__p.first); 34393e519524SHoward Hinnant } 34403e519524SHoward Hinnant return __stable_partition<typename add_lvalue_reference<_Predicate>::type> 34413e519524SHoward Hinnant (__first, __last, __pred, __len, __p, forward_iterator_tag()); 34423e519524SHoward Hinnant} 34433e519524SHoward Hinnant 34443e519524SHoward Hinnanttemplate <class _Predicate, class _BidirectionalIterator, class _Distance, class _Pair> 34453e519524SHoward Hinnant_BidirectionalIterator 34463e519524SHoward Hinnant__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, 34473e519524SHoward Hinnant _Distance __len, _Pair __p, bidirectional_iterator_tag __bit) 34483e519524SHoward Hinnant{ 34493e519524SHoward Hinnant // *__first is known to be false 34503e519524SHoward Hinnant // *__last is known to be true 34513e519524SHoward Hinnant // __len >= 2 34523e519524SHoward Hinnant if (__len == 2) 34533e519524SHoward Hinnant { 34543e519524SHoward Hinnant swap(*__first, *__last); 34553e519524SHoward Hinnant return __last; 34563e519524SHoward Hinnant } 34573e519524SHoward Hinnant if (__len == 3) 34583e519524SHoward Hinnant { 34593e519524SHoward Hinnant _BidirectionalIterator __m = __first; 34603e519524SHoward Hinnant if (__pred(*++__m)) 34613e519524SHoward Hinnant { 34623e519524SHoward Hinnant swap(*__first, *__m); 34633e519524SHoward Hinnant swap(*__m, *__last); 34643e519524SHoward Hinnant return __last; 34653e519524SHoward Hinnant } 34663e519524SHoward Hinnant swap(*__m, *__last); 34673e519524SHoward Hinnant swap(*__first, *__m); 34683e519524SHoward Hinnant return __m; 34693e519524SHoward Hinnant } 34703e519524SHoward Hinnant if (__len <= __p.second) 34713e519524SHoward Hinnant { // The buffer is big enough to use 34723e519524SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 34733e519524SHoward Hinnant __destruct_n __d(0); 34743e519524SHoward Hinnant unique_ptr<value_type, __destruct_n&> __h(__p.first, __d); 34753e519524SHoward Hinnant // Move the falses into the temporary buffer, and the trues to the front of the line 34763e519524SHoward Hinnant // Update __first to always point to the end of the trues 34773e519524SHoward Hinnant value_type* __t = __p.first; 3478ce48a113SHoward Hinnant ::new(__t) value_type(_VSTD::move(*__first)); 34793e519524SHoward Hinnant __d.__incr((value_type*)0); 34803e519524SHoward Hinnant ++__t; 34813e519524SHoward Hinnant _BidirectionalIterator __i = __first; 34823e519524SHoward Hinnant while (++__i != __last) 34833e519524SHoward Hinnant { 34843e519524SHoward Hinnant if (__pred(*__i)) 34853e519524SHoward Hinnant { 3486ce48a113SHoward Hinnant *__first = _VSTD::move(*__i); 34873e519524SHoward Hinnant ++__first; 34883e519524SHoward Hinnant } 34893e519524SHoward Hinnant else 34903e519524SHoward Hinnant { 3491ce48a113SHoward Hinnant ::new(__t) value_type(_VSTD::move(*__i)); 34923e519524SHoward Hinnant __d.__incr((value_type*)0); 34933e519524SHoward Hinnant ++__t; 34943e519524SHoward Hinnant } 34953e519524SHoward Hinnant } 34963e519524SHoward Hinnant // move *__last, known to be true 3497ce48a113SHoward Hinnant *__first = _VSTD::move(*__i); 34983e519524SHoward Hinnant __i = ++__first; 34993e519524SHoward Hinnant // All trues now at start of range, all falses in buffer 35003e519524SHoward Hinnant // Move falses back into range, but don't mess up __first which points to first false 35013e519524SHoward Hinnant for (value_type* __t2 = __p.first; __t2 < __t; ++__t2, ++__i) 3502ce48a113SHoward Hinnant *__i = _VSTD::move(*__t2); 35033e519524SHoward Hinnant // __h destructs moved-from values out of the temp buffer, but doesn't deallocate buffer 35043e519524SHoward Hinnant return __first; 35053e519524SHoward Hinnant } 35063e519524SHoward Hinnant // Else not enough buffer, do in place 35073e519524SHoward Hinnant // __len >= 4 35083e519524SHoward Hinnant _BidirectionalIterator __m = __first; 35093e519524SHoward Hinnant _Distance __len2 = __len / 2; // __len2 >= 2 3510ce48a113SHoward Hinnant _VSTD::advance(__m, __len2); 35113e519524SHoward Hinnant // recurse on [__first, __m-1], except reduce __m-1 until *(__m-1) is true, *__first know to be false 35123e519524SHoward Hinnant // F????????????????T 35133e519524SHoward Hinnant // f m l 35143e519524SHoward Hinnant _BidirectionalIterator __m1 = __m; 35153e519524SHoward Hinnant _BidirectionalIterator __first_false = __first; 35163e519524SHoward Hinnant _Distance __len_half = __len2; 35173e519524SHoward Hinnant while (!__pred(*--__m1)) 35183e519524SHoward Hinnant { 35193e519524SHoward Hinnant if (__m1 == __first) 35203e519524SHoward Hinnant goto __first_half_done; 35213e519524SHoward Hinnant --__len_half; 35223e519524SHoward Hinnant } 35233e519524SHoward Hinnant // F???TFFF?????????T 35243e519524SHoward Hinnant // f m1 m l 35253e519524SHoward Hinnant typedef typename add_lvalue_reference<_Predicate>::type _PredRef; 35263e519524SHoward Hinnant __first_false = __stable_partition<_PredRef>(__first, __m1, __pred, __len_half, __p, __bit); 35273e519524SHoward Hinnant__first_half_done: 35283e519524SHoward Hinnant // TTTFFFFF?????????T 35293e519524SHoward Hinnant // f ff m l 35303e519524SHoward Hinnant // recurse on [__m, __last], except increase __m until *(__m) is false, *__last know to be true 35313e519524SHoward Hinnant __m1 = __m; 35323e519524SHoward Hinnant _BidirectionalIterator __second_false = __last; 35333e519524SHoward Hinnant ++__second_false; 35343e519524SHoward Hinnant __len_half = __len - __len2; 35353e519524SHoward Hinnant while (__pred(*__m1)) 35363e519524SHoward Hinnant { 35373e519524SHoward Hinnant if (++__m1 == __last) 35383e519524SHoward Hinnant goto __second_half_done; 35393e519524SHoward Hinnant --__len_half; 35403e519524SHoward Hinnant } 35413e519524SHoward Hinnant // TTTFFFFFTTTF?????T 35423e519524SHoward Hinnant // f ff m m1 l 35433e519524SHoward Hinnant __second_false = __stable_partition<_PredRef>(__m1, __last, __pred, __len_half, __p, __bit); 35443e519524SHoward Hinnant__second_half_done: 35453e519524SHoward Hinnant // TTTFFFFFTTTTTFFFFF 35463e519524SHoward Hinnant // f ff m sf l 3547ce48a113SHoward Hinnant return _VSTD::rotate(__first_false, __m, __second_false); 35483e519524SHoward Hinnant // TTTTTTTTFFFFFFFFFF 35493e519524SHoward Hinnant // | 35503e519524SHoward Hinnant} 35513e519524SHoward Hinnant 35523e519524SHoward Hinnanttemplate <class _Predicate, class _BidirectionalIterator> 35533e519524SHoward Hinnant_BidirectionalIterator 35543e519524SHoward Hinnant__stable_partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred, 35553e519524SHoward Hinnant bidirectional_iterator_tag) 35563e519524SHoward Hinnant{ 35573e519524SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; 35583e519524SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 35593e519524SHoward Hinnant const difference_type __alloc_limit = 4; // might want to make this a function of trivial assignment 35603e519524SHoward Hinnant // Either prove all true and return __first or point to first false 35613e519524SHoward Hinnant while (true) 35623e519524SHoward Hinnant { 35633e519524SHoward Hinnant if (__first == __last) 35643e519524SHoward Hinnant return __first; 35653e519524SHoward Hinnant if (!__pred(*__first)) 35663e519524SHoward Hinnant break; 35673e519524SHoward Hinnant ++__first; 35683e519524SHoward Hinnant } 35693e519524SHoward Hinnant // __first points to first false, everything prior to __first is already set. 35703e519524SHoward Hinnant // Either prove [__first, __last) is all false and return __first, or point __last to last true 35713e519524SHoward Hinnant do 35723e519524SHoward Hinnant { 35733e519524SHoward Hinnant if (__first == --__last) 35743e519524SHoward Hinnant return __first; 35753e519524SHoward Hinnant } while (!__pred(*__last)); 35763e519524SHoward Hinnant // We now have a reduced range [__first, __last] 35773e519524SHoward Hinnant // *__first is known to be false 35783e519524SHoward Hinnant // *__last is known to be true 35793e519524SHoward Hinnant // __len >= 2 3580ce48a113SHoward Hinnant difference_type __len = _VSTD::distance(__first, __last) + 1; 35813e519524SHoward Hinnant pair<value_type*, ptrdiff_t> __p(0, 0); 35823e519524SHoward Hinnant unique_ptr<value_type, __return_temporary_buffer> __h; 35833e519524SHoward Hinnant if (__len >= __alloc_limit) 35843e519524SHoward Hinnant { 3585ce48a113SHoward Hinnant __p = _VSTD::get_temporary_buffer<value_type>(__len); 35863e519524SHoward Hinnant __h.reset(__p.first); 35873e519524SHoward Hinnant } 35883e519524SHoward Hinnant return __stable_partition<typename add_lvalue_reference<_Predicate>::type> 35893e519524SHoward Hinnant (__first, __last, __pred, __len, __p, bidirectional_iterator_tag()); 35903e519524SHoward Hinnant} 35913e519524SHoward Hinnant 35923e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Predicate> 35933e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 35943e519524SHoward Hinnant_ForwardIterator 35953e519524SHoward Hinnantstable_partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) 35963e519524SHoward Hinnant{ 35973e519524SHoward Hinnant return __stable_partition<typename add_lvalue_reference<_Predicate>::type> 35983e519524SHoward Hinnant (__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category()); 35993e519524SHoward Hinnant} 36003e519524SHoward Hinnant 36013e519524SHoward Hinnant// is_sorted_until 36023e519524SHoward Hinnant 36033e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Compare> 36043e519524SHoward Hinnant_ForwardIterator 36053e519524SHoward Hinnantis_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 36063e519524SHoward Hinnant{ 36073e519524SHoward Hinnant if (__first != __last) 36083e519524SHoward Hinnant { 36093e519524SHoward Hinnant _ForwardIterator __i = __first; 36103e519524SHoward Hinnant while (++__i != __last) 36113e519524SHoward Hinnant { 36123e519524SHoward Hinnant if (__comp(*__i, *__first)) 36133e519524SHoward Hinnant return __i; 36143e519524SHoward Hinnant __first = __i; 36153e519524SHoward Hinnant } 36163e519524SHoward Hinnant } 36173e519524SHoward Hinnant return __last; 36183e519524SHoward Hinnant} 36193e519524SHoward Hinnant 36203e519524SHoward Hinnanttemplate<class _ForwardIterator> 36213e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 36223e519524SHoward Hinnant_ForwardIterator 36233e519524SHoward Hinnantis_sorted_until(_ForwardIterator __first, _ForwardIterator __last) 36243e519524SHoward Hinnant{ 3625ce48a113SHoward Hinnant return _VSTD::is_sorted_until(__first, __last, __less<typename iterator_traits<_ForwardIterator>::value_type>()); 36263e519524SHoward Hinnant} 36273e519524SHoward Hinnant 36283e519524SHoward Hinnant// is_sorted 36293e519524SHoward Hinnant 36303e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Compare> 36313e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 36323e519524SHoward Hinnantbool 36333e519524SHoward Hinnantis_sorted(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) 36343e519524SHoward Hinnant{ 3635ce48a113SHoward Hinnant return _VSTD::is_sorted_until(__first, __last, __comp) == __last; 36363e519524SHoward Hinnant} 36373e519524SHoward Hinnant 36383e519524SHoward Hinnanttemplate<class _ForwardIterator> 36393e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 36403e519524SHoward Hinnantbool 36413e519524SHoward Hinnantis_sorted(_ForwardIterator __first, _ForwardIterator __last) 36423e519524SHoward Hinnant{ 3643ce48a113SHoward Hinnant return _VSTD::is_sorted(__first, __last, __less<typename iterator_traits<_ForwardIterator>::value_type>()); 36443e519524SHoward Hinnant} 36453e519524SHoward Hinnant 36463e519524SHoward Hinnant// sort 36473e519524SHoward Hinnant 36483e519524SHoward Hinnant// stable, 2-3 compares, 0-2 swaps 36493e519524SHoward Hinnant 36503e519524SHoward Hinnanttemplate <class _Compare, class _ForwardIterator> 36513e519524SHoward Hinnantunsigned 36523e519524SHoward Hinnant__sort3(_ForwardIterator __x, _ForwardIterator __y, _ForwardIterator __z, _Compare __c) 36533e519524SHoward Hinnant{ 36543e519524SHoward Hinnant unsigned __r = 0; 36553e519524SHoward Hinnant if (!__c(*__y, *__x)) // if x <= y 36563e519524SHoward Hinnant { 36573e519524SHoward Hinnant if (!__c(*__z, *__y)) // if y <= z 36583e519524SHoward Hinnant return __r; // x <= y && y <= z 36593e519524SHoward Hinnant // x <= y && y > z 36603e519524SHoward Hinnant swap(*__y, *__z); // x <= z && y < z 36613e519524SHoward Hinnant __r = 1; 36623e519524SHoward Hinnant if (__c(*__y, *__x)) // if x > y 36633e519524SHoward Hinnant { 36643e519524SHoward Hinnant swap(*__x, *__y); // x < y && y <= z 36653e519524SHoward Hinnant __r = 2; 36663e519524SHoward Hinnant } 36673e519524SHoward Hinnant return __r; // x <= y && y < z 36683e519524SHoward Hinnant } 36693e519524SHoward Hinnant if (__c(*__z, *__y)) // x > y, if y > z 36703e519524SHoward Hinnant { 36713e519524SHoward Hinnant swap(*__x, *__z); // x < y && y < z 36723e519524SHoward Hinnant __r = 1; 36733e519524SHoward Hinnant return __r; 36743e519524SHoward Hinnant } 36753e519524SHoward Hinnant swap(*__x, *__y); // x > y && y <= z 36763e519524SHoward Hinnant __r = 1; // x < y && x <= z 36773e519524SHoward Hinnant if (__c(*__z, *__y)) // if y > z 36783e519524SHoward Hinnant { 36793e519524SHoward Hinnant swap(*__y, *__z); // x <= y && y < z 36803e519524SHoward Hinnant __r = 2; 36813e519524SHoward Hinnant } 36823e519524SHoward Hinnant return __r; 36833e519524SHoward Hinnant} // x <= y && y <= z 36843e519524SHoward Hinnant 36853e519524SHoward Hinnant// stable, 3-6 compares, 0-5 swaps 36863e519524SHoward Hinnant 36873e519524SHoward Hinnanttemplate <class _Compare, class _ForwardIterator> 36883e519524SHoward Hinnantunsigned 36893e519524SHoward Hinnant__sort4(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, 36903e519524SHoward Hinnant _ForwardIterator __x4, _Compare __c) 36913e519524SHoward Hinnant{ 36923e519524SHoward Hinnant unsigned __r = __sort3<_Compare>(__x1, __x2, __x3, __c); 36933e519524SHoward Hinnant if (__c(*__x4, *__x3)) 36943e519524SHoward Hinnant { 36953e519524SHoward Hinnant swap(*__x3, *__x4); 36963e519524SHoward Hinnant ++__r; 36973e519524SHoward Hinnant if (__c(*__x3, *__x2)) 36983e519524SHoward Hinnant { 36993e519524SHoward Hinnant swap(*__x2, *__x3); 37003e519524SHoward Hinnant ++__r; 37013e519524SHoward Hinnant if (__c(*__x2, *__x1)) 37023e519524SHoward Hinnant { 37033e519524SHoward Hinnant swap(*__x1, *__x2); 37043e519524SHoward Hinnant ++__r; 37053e519524SHoward Hinnant } 37063e519524SHoward Hinnant } 37073e519524SHoward Hinnant } 37083e519524SHoward Hinnant return __r; 37093e519524SHoward Hinnant} 37103e519524SHoward Hinnant 37113e519524SHoward Hinnant// stable, 4-10 compares, 0-9 swaps 37123e519524SHoward Hinnant 37133e519524SHoward Hinnanttemplate <class _Compare, class _ForwardIterator> 37143e519524SHoward Hinnantunsigned 37153e519524SHoward Hinnant__sort5(_ForwardIterator __x1, _ForwardIterator __x2, _ForwardIterator __x3, 37163e519524SHoward Hinnant _ForwardIterator __x4, _ForwardIterator __x5, _Compare __c) 37173e519524SHoward Hinnant{ 37183e519524SHoward Hinnant unsigned __r = __sort4<_Compare>(__x1, __x2, __x3, __x4, __c); 37193e519524SHoward Hinnant if (__c(*__x5, *__x4)) 37203e519524SHoward Hinnant { 37213e519524SHoward Hinnant swap(*__x4, *__x5); 37223e519524SHoward Hinnant ++__r; 37233e519524SHoward Hinnant if (__c(*__x4, *__x3)) 37243e519524SHoward Hinnant { 37253e519524SHoward Hinnant swap(*__x3, *__x4); 37263e519524SHoward Hinnant ++__r; 37273e519524SHoward Hinnant if (__c(*__x3, *__x2)) 37283e519524SHoward Hinnant { 37293e519524SHoward Hinnant swap(*__x2, *__x3); 37303e519524SHoward Hinnant ++__r; 37313e519524SHoward Hinnant if (__c(*__x2, *__x1)) 37323e519524SHoward Hinnant { 37333e519524SHoward Hinnant swap(*__x1, *__x2); 37343e519524SHoward Hinnant ++__r; 37353e519524SHoward Hinnant } 37363e519524SHoward Hinnant } 37373e519524SHoward Hinnant } 37383e519524SHoward Hinnant } 37393e519524SHoward Hinnant return __r; 37403e519524SHoward Hinnant} 37413e519524SHoward Hinnant 37423e519524SHoward Hinnant// Assumes size > 0 37433e519524SHoward Hinnanttemplate <class _Compare, class _BirdirectionalIterator> 37443e519524SHoward Hinnantvoid 37453e519524SHoward Hinnant__selection_sort(_BirdirectionalIterator __first, _BirdirectionalIterator __last, _Compare __comp) 37463e519524SHoward Hinnant{ 37473e519524SHoward Hinnant _BirdirectionalIterator __lm1 = __last; 37483e519524SHoward Hinnant for (--__lm1; __first != __lm1; ++__first) 37493e519524SHoward Hinnant { 3750ce48a113SHoward Hinnant _BirdirectionalIterator __i = _VSTD::min_element<_BirdirectionalIterator, 37513e519524SHoward Hinnant typename add_lvalue_reference<_Compare>::type> 37523e519524SHoward Hinnant (__first, __last, __comp); 37533e519524SHoward Hinnant if (__i != __first) 37543e519524SHoward Hinnant swap(*__first, *__i); 37553e519524SHoward Hinnant } 37563e519524SHoward Hinnant} 37573e519524SHoward Hinnant 37583e519524SHoward Hinnanttemplate <class _Compare, class _BirdirectionalIterator> 37593e519524SHoward Hinnantvoid 37603e519524SHoward Hinnant__insertion_sort(_BirdirectionalIterator __first, _BirdirectionalIterator __last, _Compare __comp) 37613e519524SHoward Hinnant{ 37623e519524SHoward Hinnant typedef typename iterator_traits<_BirdirectionalIterator>::value_type value_type; 37633e519524SHoward Hinnant if (__first != __last) 37643e519524SHoward Hinnant { 37653e519524SHoward Hinnant _BirdirectionalIterator __i = __first; 37663e519524SHoward Hinnant for (++__i; __i != __last; ++__i) 37673e519524SHoward Hinnant { 37683e519524SHoward Hinnant _BirdirectionalIterator __j = __i; 3769ce48a113SHoward Hinnant value_type __t(_VSTD::move(*__j)); 37703e519524SHoward Hinnant for (_BirdirectionalIterator __k = __i; __k != __first && __comp(__t, *--__k); --__j) 3771ce48a113SHoward Hinnant *__j = _VSTD::move(*__k); 3772ce48a113SHoward Hinnant *__j = _VSTD::move(__t); 37733e519524SHoward Hinnant } 37743e519524SHoward Hinnant } 37753e519524SHoward Hinnant} 37763e519524SHoward Hinnant 37773e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 37783e519524SHoward Hinnantvoid 37793e519524SHoward Hinnant__insertion_sort_3(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 37803e519524SHoward Hinnant{ 37813e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 37823e519524SHoward Hinnant _RandomAccessIterator __j = __first+2; 37833e519524SHoward Hinnant __sort3<_Compare>(__first, __first+1, __j, __comp); 37843e519524SHoward Hinnant for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) 37853e519524SHoward Hinnant { 37863e519524SHoward Hinnant if (__comp(*__i, *__j)) 37873e519524SHoward Hinnant { 3788ce48a113SHoward Hinnant value_type __t(_VSTD::move(*__i)); 37893e519524SHoward Hinnant _RandomAccessIterator __k = __j; 37903e519524SHoward Hinnant __j = __i; 37913e519524SHoward Hinnant do 37923e519524SHoward Hinnant { 3793ce48a113SHoward Hinnant *__j = _VSTD::move(*__k); 37943e519524SHoward Hinnant __j = __k; 37953e519524SHoward Hinnant } while (__j != __first && __comp(__t, *--__k)); 3796ce48a113SHoward Hinnant *__j = _VSTD::move(__t); 37973e519524SHoward Hinnant } 37983e519524SHoward Hinnant __j = __i; 37993e519524SHoward Hinnant } 38003e519524SHoward Hinnant} 38013e519524SHoward Hinnant 38023e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 38033e519524SHoward Hinnantbool 38043e519524SHoward Hinnant__insertion_sort_incomplete(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 38053e519524SHoward Hinnant{ 38063e519524SHoward Hinnant switch (__last - __first) 38073e519524SHoward Hinnant { 38083e519524SHoward Hinnant case 0: 38093e519524SHoward Hinnant case 1: 38103e519524SHoward Hinnant return true; 38113e519524SHoward Hinnant case 2: 38123e519524SHoward Hinnant if (__comp(*--__last, *__first)) 38133e519524SHoward Hinnant swap(*__first, *__last); 38143e519524SHoward Hinnant return true; 38153e519524SHoward Hinnant case 3: 3816ce48a113SHoward Hinnant _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); 38173e519524SHoward Hinnant return true; 38183e519524SHoward Hinnant case 4: 3819ce48a113SHoward Hinnant _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); 38203e519524SHoward Hinnant return true; 38213e519524SHoward Hinnant case 5: 3822ce48a113SHoward Hinnant _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); 38233e519524SHoward Hinnant return true; 38243e519524SHoward Hinnant } 38253e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 38263e519524SHoward Hinnant _RandomAccessIterator __j = __first+2; 38273e519524SHoward Hinnant __sort3<_Compare>(__first, __first+1, __j, __comp); 38283e519524SHoward Hinnant const unsigned __limit = 8; 38293e519524SHoward Hinnant unsigned __count = 0; 38303e519524SHoward Hinnant for (_RandomAccessIterator __i = __j+1; __i != __last; ++__i) 38313e519524SHoward Hinnant { 38323e519524SHoward Hinnant if (__comp(*__i, *__j)) 38333e519524SHoward Hinnant { 3834ce48a113SHoward Hinnant value_type __t(_VSTD::move(*__i)); 38353e519524SHoward Hinnant _RandomAccessIterator __k = __j; 38363e519524SHoward Hinnant __j = __i; 38373e519524SHoward Hinnant do 38383e519524SHoward Hinnant { 3839ce48a113SHoward Hinnant *__j = _VSTD::move(*__k); 38403e519524SHoward Hinnant __j = __k; 38413e519524SHoward Hinnant } while (__j != __first && __comp(__t, *--__k)); 3842ce48a113SHoward Hinnant *__j = _VSTD::move(__t); 38433e519524SHoward Hinnant if (++__count == __limit) 38443e519524SHoward Hinnant return ++__i == __last; 38453e519524SHoward Hinnant } 38463e519524SHoward Hinnant __j = __i; 38473e519524SHoward Hinnant } 38483e519524SHoward Hinnant return true; 38493e519524SHoward Hinnant} 38503e519524SHoward Hinnant 38513e519524SHoward Hinnanttemplate <class _Compare, class _BirdirectionalIterator> 38523e519524SHoward Hinnantvoid 38533e519524SHoward Hinnant__insertion_sort_move(_BirdirectionalIterator __first1, _BirdirectionalIterator __last1, 38543e519524SHoward Hinnant typename iterator_traits<_BirdirectionalIterator>::value_type* __first2, _Compare __comp) 38553e519524SHoward Hinnant{ 38563e519524SHoward Hinnant typedef typename iterator_traits<_BirdirectionalIterator>::value_type value_type; 38573e519524SHoward Hinnant if (__first1 != __last1) 38583e519524SHoward Hinnant { 38593e519524SHoward Hinnant __destruct_n __d(0); 38603e519524SHoward Hinnant unique_ptr<value_type, __destruct_n&> __h(__first2, __d); 38613e519524SHoward Hinnant value_type* __last2 = __first2; 3862ce48a113SHoward Hinnant ::new(__last2) value_type(_VSTD::move(*__first1)); 38633e519524SHoward Hinnant __d.__incr((value_type*)0); 38643e519524SHoward Hinnant for (++__last2; ++__first1 != __last1; ++__last2) 38653e519524SHoward Hinnant { 38663e519524SHoward Hinnant value_type* __j2 = __last2; 38673e519524SHoward Hinnant value_type* __i2 = __j2; 38683e519524SHoward Hinnant if (__comp(*__first1, *--__i2)) 38693e519524SHoward Hinnant { 3870ce48a113SHoward Hinnant ::new(__j2) value_type(_VSTD::move(*__i2)); 38713e519524SHoward Hinnant __d.__incr((value_type*)0); 38723e519524SHoward Hinnant for (--__j2; __i2 != __first2 && __comp(*__first1, *--__i2); --__j2) 3873ce48a113SHoward Hinnant *__j2 = _VSTD::move(*__i2); 3874ce48a113SHoward Hinnant *__j2 = _VSTD::move(*__first1); 38753e519524SHoward Hinnant } 38763e519524SHoward Hinnant else 38773e519524SHoward Hinnant { 3878ce48a113SHoward Hinnant ::new(__j2) value_type(_VSTD::move(*__first1)); 38793e519524SHoward Hinnant __d.__incr((value_type*)0); 38803e519524SHoward Hinnant } 38813e519524SHoward Hinnant } 38823e519524SHoward Hinnant __h.release(); 38833e519524SHoward Hinnant } 38843e519524SHoward Hinnant} 38853e519524SHoward Hinnant 38863e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 38873e519524SHoward Hinnantvoid 38883e519524SHoward Hinnant__sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 38893e519524SHoward Hinnant{ 38903e519524SHoward Hinnant // _Compare is known to be a reference type 38913e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 38923e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 3893ca740483SHoward Hinnant const difference_type __limit = is_trivially_copy_constructible<value_type>::value && 3894ca740483SHoward Hinnant is_trivially_copy_assignable<value_type>::value ? 30 : 6; 38953e519524SHoward Hinnant while (true) 38963e519524SHoward Hinnant { 38973e519524SHoward Hinnant __restart: 38983e519524SHoward Hinnant difference_type __len = __last - __first; 38993e519524SHoward Hinnant switch (__len) 39003e519524SHoward Hinnant { 39013e519524SHoward Hinnant case 0: 39023e519524SHoward Hinnant case 1: 39033e519524SHoward Hinnant return; 39043e519524SHoward Hinnant case 2: 39053e519524SHoward Hinnant if (__comp(*--__last, *__first)) 39063e519524SHoward Hinnant swap(*__first, *__last); 39073e519524SHoward Hinnant return; 39083e519524SHoward Hinnant case 3: 3909ce48a113SHoward Hinnant _VSTD::__sort3<_Compare>(__first, __first+1, --__last, __comp); 39103e519524SHoward Hinnant return; 39113e519524SHoward Hinnant case 4: 3912ce48a113SHoward Hinnant _VSTD::__sort4<_Compare>(__first, __first+1, __first+2, --__last, __comp); 39133e519524SHoward Hinnant return; 39143e519524SHoward Hinnant case 5: 3915ce48a113SHoward Hinnant _VSTD::__sort5<_Compare>(__first, __first+1, __first+2, __first+3, --__last, __comp); 39163e519524SHoward Hinnant return; 39173e519524SHoward Hinnant } 39183e519524SHoward Hinnant if (__len <= __limit) 39193e519524SHoward Hinnant { 3920ce48a113SHoward Hinnant _VSTD::__insertion_sort_3<_Compare>(__first, __last, __comp); 39213e519524SHoward Hinnant return; 39223e519524SHoward Hinnant } 39233e519524SHoward Hinnant // __len > 5 39243e519524SHoward Hinnant _RandomAccessIterator __m = __first; 39253e519524SHoward Hinnant _RandomAccessIterator __lm1 = __last; 39263e519524SHoward Hinnant --__lm1; 39273e519524SHoward Hinnant unsigned __n_swaps; 39283e519524SHoward Hinnant { 39293e519524SHoward Hinnant difference_type __delta; 39303e519524SHoward Hinnant if (__len >= 1000) 39313e519524SHoward Hinnant { 39323e519524SHoward Hinnant __delta = __len/2; 39333e519524SHoward Hinnant __m += __delta; 39343e519524SHoward Hinnant __delta /= 2; 3935ce48a113SHoward Hinnant __n_swaps = _VSTD::__sort5<_Compare>(__first, __first + __delta, __m, __m+__delta, __lm1, __comp); 39363e519524SHoward Hinnant } 39373e519524SHoward Hinnant else 39383e519524SHoward Hinnant { 39393e519524SHoward Hinnant __delta = __len/2; 39403e519524SHoward Hinnant __m += __delta; 3941ce48a113SHoward Hinnant __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, __lm1, __comp); 39423e519524SHoward Hinnant } 39433e519524SHoward Hinnant } 39443e519524SHoward Hinnant // *__m is median 39453e519524SHoward Hinnant // partition [__first, __m) < *__m and *__m <= [__m, __last) 39463e519524SHoward Hinnant // (this inhibits tossing elements equivalent to __m around unnecessarily) 39473e519524SHoward Hinnant _RandomAccessIterator __i = __first; 39483e519524SHoward Hinnant _RandomAccessIterator __j = __lm1; 39493e519524SHoward Hinnant // j points beyond range to be tested, *__m is known to be <= *__lm1 39503e519524SHoward Hinnant // The search going up is known to be guarded but the search coming down isn't. 39513e519524SHoward Hinnant // Prime the downward search with a guard. 39523e519524SHoward Hinnant if (!__comp(*__i, *__m)) // if *__first == *__m 39533e519524SHoward Hinnant { 39543e519524SHoward Hinnant // *__first == *__m, *__first doesn't go in first part 39553e519524SHoward Hinnant // manually guard downward moving __j against __i 39563e519524SHoward Hinnant while (true) 39573e519524SHoward Hinnant { 39583e519524SHoward Hinnant if (__i == --__j) 39593e519524SHoward Hinnant { 39603e519524SHoward Hinnant // *__first == *__m, *__m <= all other elements 39613e519524SHoward Hinnant // Parition instead into [__first, __i) == *__first and *__first < [__i, __last) 39623e519524SHoward Hinnant ++__i; // __first + 1 39633e519524SHoward Hinnant __j = __last; 39643e519524SHoward Hinnant if (!__comp(*__first, *--__j)) // we need a guard if *__first == *(__last-1) 39653e519524SHoward Hinnant { 39663e519524SHoward Hinnant while (true) 39673e519524SHoward Hinnant { 39683e519524SHoward Hinnant if (__i == __j) 39693e519524SHoward Hinnant return; // [__first, __last) all equivalent elements 39703e519524SHoward Hinnant if (__comp(*__first, *__i)) 39713e519524SHoward Hinnant { 39723e519524SHoward Hinnant swap(*__i, *__j); 39733e519524SHoward Hinnant ++__n_swaps; 39743e519524SHoward Hinnant ++__i; 39753e519524SHoward Hinnant break; 39763e519524SHoward Hinnant } 39773e519524SHoward Hinnant ++__i; 39783e519524SHoward Hinnant } 39793e519524SHoward Hinnant } 39803e519524SHoward Hinnant // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 39813e519524SHoward Hinnant if (__i == __j) 39823e519524SHoward Hinnant return; 39833e519524SHoward Hinnant while (true) 39843e519524SHoward Hinnant { 39853e519524SHoward Hinnant while (!__comp(*__first, *__i)) 39863e519524SHoward Hinnant ++__i; 39873e519524SHoward Hinnant while (__comp(*__first, *--__j)) 39883e519524SHoward Hinnant ; 39893e519524SHoward Hinnant if (__i >= __j) 39903e519524SHoward Hinnant break; 39913e519524SHoward Hinnant swap(*__i, *__j); 39923e519524SHoward Hinnant ++__n_swaps; 39933e519524SHoward Hinnant ++__i; 39943e519524SHoward Hinnant } 39953e519524SHoward Hinnant // [__first, __i) == *__first and *__first < [__i, __last) 39963e519524SHoward Hinnant // The first part is sorted, sort the secod part 3997ce48a113SHoward Hinnant // _VSTD::__sort<_Compare>(__i, __last, __comp); 39983e519524SHoward Hinnant __first = __i; 39993e519524SHoward Hinnant goto __restart; 40003e519524SHoward Hinnant } 40013e519524SHoward Hinnant if (__comp(*__j, *__m)) 40023e519524SHoward Hinnant { 40033e519524SHoward Hinnant swap(*__i, *__j); 40043e519524SHoward Hinnant ++__n_swaps; 40053e519524SHoward Hinnant break; // found guard for downward moving __j, now use unguarded partition 40063e519524SHoward Hinnant } 40073e519524SHoward Hinnant } 40083e519524SHoward Hinnant } 40093e519524SHoward Hinnant // It is known that *__i < *__m 40103e519524SHoward Hinnant ++__i; 40113e519524SHoward Hinnant // j points beyond range to be tested, *__m is known to be <= *__lm1 40123e519524SHoward Hinnant // if not yet partitioned... 40133e519524SHoward Hinnant if (__i < __j) 40143e519524SHoward Hinnant { 40153e519524SHoward Hinnant // known that *(__i - 1) < *__m 40163e519524SHoward Hinnant // known that __i <= __m 40173e519524SHoward Hinnant while (true) 40183e519524SHoward Hinnant { 40193e519524SHoward Hinnant // __m still guards upward moving __i 40203e519524SHoward Hinnant while (__comp(*__i, *__m)) 40213e519524SHoward Hinnant ++__i; 40223e519524SHoward Hinnant // It is now known that a guard exists for downward moving __j 40233e519524SHoward Hinnant while (!__comp(*--__j, *__m)) 40243e519524SHoward Hinnant ; 40253e519524SHoward Hinnant if (__i > __j) 40263e519524SHoward Hinnant break; 40273e519524SHoward Hinnant swap(*__i, *__j); 40283e519524SHoward Hinnant ++__n_swaps; 40293e519524SHoward Hinnant // It is known that __m != __j 40303e519524SHoward Hinnant // If __m just moved, follow it 40313e519524SHoward Hinnant if (__m == __i) 40323e519524SHoward Hinnant __m = __j; 40333e519524SHoward Hinnant ++__i; 40343e519524SHoward Hinnant } 40353e519524SHoward Hinnant } 40363e519524SHoward Hinnant // [__first, __i) < *__m and *__m <= [__i, __last) 40373e519524SHoward Hinnant if (__i != __m && __comp(*__m, *__i)) 40383e519524SHoward Hinnant { 40393e519524SHoward Hinnant swap(*__i, *__m); 40403e519524SHoward Hinnant ++__n_swaps; 40413e519524SHoward Hinnant } 40423e519524SHoward Hinnant // [__first, __i) < *__i and *__i <= [__i+1, __last) 40433e519524SHoward Hinnant // If we were given a perfect partition, see if insertion sort is quick... 40443e519524SHoward Hinnant if (__n_swaps == 0) 40453e519524SHoward Hinnant { 4046ce48a113SHoward Hinnant bool __fs = _VSTD::__insertion_sort_incomplete<_Compare>(__first, __i, __comp); 4047ce48a113SHoward Hinnant if (_VSTD::__insertion_sort_incomplete<_Compare>(__i+1, __last, __comp)) 40483e519524SHoward Hinnant { 40493e519524SHoward Hinnant if (__fs) 40503e519524SHoward Hinnant return; 40513e519524SHoward Hinnant __last = __i; 40523e519524SHoward Hinnant continue; 40533e519524SHoward Hinnant } 40543e519524SHoward Hinnant else 40553e519524SHoward Hinnant { 40563e519524SHoward Hinnant if (__fs) 40573e519524SHoward Hinnant { 40583e519524SHoward Hinnant __first = ++__i; 40593e519524SHoward Hinnant continue; 40603e519524SHoward Hinnant } 40613e519524SHoward Hinnant } 40623e519524SHoward Hinnant } 40633e519524SHoward Hinnant // sort smaller range with recursive call and larger with tail recursion elimination 40643e519524SHoward Hinnant if (__i - __first < __last - __i) 40653e519524SHoward Hinnant { 4066ce48a113SHoward Hinnant _VSTD::__sort<_Compare>(__first, __i, __comp); 4067ce48a113SHoward Hinnant // _VSTD::__sort<_Compare>(__i+1, __last, __comp); 40683e519524SHoward Hinnant __first = ++__i; 40693e519524SHoward Hinnant } 40703e519524SHoward Hinnant else 40713e519524SHoward Hinnant { 4072ce48a113SHoward Hinnant _VSTD::__sort<_Compare>(__i+1, __last, __comp); 4073ce48a113SHoward Hinnant // _VSTD::__sort<_Compare>(__first, __i, __comp); 40743e519524SHoward Hinnant __last = __i; 40753e519524SHoward Hinnant } 40763e519524SHoward Hinnant } 40773e519524SHoward Hinnant} 40783e519524SHoward Hinnant 40793e519524SHoward Hinnant// This forwarder keeps the top call and the recursive calls using the same instantiation, forcing a reference _Compare 40803e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 40813e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 40823e519524SHoward Hinnantvoid 40833e519524SHoward Hinnantsort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 40843e519524SHoward Hinnant{ 4085145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 40863e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 40873e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 40883e519524SHoward Hinnant __sort<_Comp_ref>(__first, __last, __c); 4089145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 40903e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 40913e519524SHoward Hinnant __sort<_Comp_ref>(__first, __last, __comp); 4092145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 40933e519524SHoward Hinnant} 40943e519524SHoward Hinnant 40953e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 40963e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 40973e519524SHoward Hinnantvoid 40983e519524SHoward Hinnantsort(_RandomAccessIterator __first, _RandomAccessIterator __last) 40993e519524SHoward Hinnant{ 4100ce48a113SHoward Hinnant _VSTD::sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 41013e519524SHoward Hinnant} 41023e519524SHoward Hinnant 41033e519524SHoward Hinnanttemplate <class _Tp> 41043e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 41053e519524SHoward Hinnantvoid 41063e519524SHoward Hinnantsort(_Tp** __first, _Tp** __last) 41073e519524SHoward Hinnant{ 4108ce48a113SHoward Hinnant _VSTD::sort((size_t*)__first, (size_t*)__last, __less<size_t>()); 41093e519524SHoward Hinnant} 41103e519524SHoward Hinnant 41113e519524SHoward Hinnanttemplate <class _Tp> 41123e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 41133e519524SHoward Hinnantvoid 41143e519524SHoward Hinnantsort(__wrap_iter<_Tp*> __first, __wrap_iter<_Tp*> __last) 41153e519524SHoward Hinnant{ 4116ce48a113SHoward Hinnant _VSTD::sort(__first.base(), __last.base()); 41173e519524SHoward Hinnant} 41183e519524SHoward Hinnant 4119f554add5SHoward Hinnanttemplate <class _Tp, class _Compare> 4120f554add5SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 4121f554add5SHoward Hinnantvoid 4122f554add5SHoward Hinnantsort(__wrap_iter<_Tp*> __first, __wrap_iter<_Tp*> __last, _Compare __comp) 4123f554add5SHoward Hinnant{ 4124f554add5SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4125f554add5SHoward Hinnant _VSTD::sort<_Tp*, _Comp_ref>(__first.base(), __last.base(), __comp); 4126f554add5SHoward Hinnant} 4127f554add5SHoward Hinnant 41280be8f64cSHoward Hinnant#ifdef _LIBCPP_MSVC 4129e4383379SHoward Hinnant#pragma warning( push ) 4130e4383379SHoward Hinnant#pragma warning( disable: 4231) 41310be8f64cSHoward Hinnant#endif // _LIBCPP_MSVC 4132f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<char>&, char*>(char*, char*, __less<char>&)) 4133f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&)) 4134f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&)) 4135f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned char>&, unsigned char*>(unsigned char*, unsigned char*, __less<unsigned char>&)) 4136f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<short>&, short*>(short*, short*, __less<short>&)) 4137f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned short>&, unsigned short*>(unsigned short*, unsigned short*, __less<unsigned short>&)) 4138f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<int>&, int*>(int*, int*, __less<int>&)) 4139f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned>&, unsigned*>(unsigned*, unsigned*, __less<unsigned>&)) 4140f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<long>&, long*>(long*, long*, __less<long>&)) 4141f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&)) 4142f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<long long>&, long long*>(long long*, long long*, __less<long long>&)) 4143f0544c20SHoward Hinnant_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>&)) 4144f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<float>&, float*>(float*, float*, __less<float>&)) 4145f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<double>&, double*>(double*, double*, __less<double>&)) 4146f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS void __sort<__less<long double>&, long double*>(long double*, long double*, __less<long double>&)) 41473e519524SHoward Hinnant 4148f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<char>&, char*>(char*, char*, __less<char>&)) 4149f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<wchar_t>&, wchar_t*>(wchar_t*, wchar_t*, __less<wchar_t>&)) 4150f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<signed char>&, signed char*>(signed char*, signed char*, __less<signed char>&)) 4151f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned char>&, unsigned char*>(unsigned char*, unsigned char*, __less<unsigned char>&)) 4152f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<short>&, short*>(short*, short*, __less<short>&)) 4153f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned short>&, unsigned short*>(unsigned short*, unsigned short*, __less<unsigned short>&)) 4154f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<int>&, int*>(int*, int*, __less<int>&)) 4155f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned>&, unsigned*>(unsigned*, unsigned*, __less<unsigned>&)) 4156f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long>&, long*>(long*, long*, __less<long>&)) 4157f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<unsigned long>&, unsigned long*>(unsigned long*, unsigned long*, __less<unsigned long>&)) 4158f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long long>&, long long*>(long long*, long long*, __less<long long>&)) 4159f0544c20SHoward Hinnant_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>&)) 4160f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<float>&, float*>(float*, float*, __less<float>&)) 4161f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<double>&, double*>(double*, double*, __less<double>&)) 4162f0544c20SHoward Hinnant_LIBCPP_EXTERN_TEMPLATE(_LIBCPP_FUNC_VIS bool __insertion_sort_incomplete<__less<long double>&, long double*>(long double*, long double*, __less<long double>&)) 41633e519524SHoward Hinnant 4164f0544c20SHoward Hinnant_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>&)) 41650be8f64cSHoward Hinnant#ifdef _LIBCPP_MSVC 4166e4383379SHoward Hinnant#pragma warning( pop ) 41670be8f64cSHoward Hinnant#endif // _LIBCPP_MSVC 41683e519524SHoward Hinnant 41693e519524SHoward Hinnant// lower_bound 41703e519524SHoward Hinnant 41713e519524SHoward Hinnanttemplate <class _Compare, class _ForwardIterator, class _Tp> 41723e519524SHoward Hinnant_ForwardIterator 4173e4383379SHoward Hinnant__lower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 41743e519524SHoward Hinnant{ 41753e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 4176ce48a113SHoward Hinnant difference_type __len = _VSTD::distance(__first, __last); 41773e519524SHoward Hinnant while (__len != 0) 41783e519524SHoward Hinnant { 41793e519524SHoward Hinnant difference_type __l2 = __len / 2; 41803e519524SHoward Hinnant _ForwardIterator __m = __first; 4181ce48a113SHoward Hinnant _VSTD::advance(__m, __l2); 4182e4383379SHoward Hinnant if (__comp(*__m, __value_)) 41833e519524SHoward Hinnant { 41843e519524SHoward Hinnant __first = ++__m; 41853e519524SHoward Hinnant __len -= __l2 + 1; 41863e519524SHoward Hinnant } 41873e519524SHoward Hinnant else 41883e519524SHoward Hinnant __len = __l2; 41893e519524SHoward Hinnant } 41903e519524SHoward Hinnant return __first; 41913e519524SHoward Hinnant} 41923e519524SHoward Hinnant 41933e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp, class _Compare> 41943e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 41953e519524SHoward Hinnant_ForwardIterator 4196e4383379SHoward Hinnantlower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 41973e519524SHoward Hinnant{ 4198145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 41993e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 42003e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 4201e4383379SHoward Hinnant return __lower_bound<_Comp_ref>(__first, __last, __value_, __c); 4202145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 42033e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4204e4383379SHoward Hinnant return __lower_bound<_Comp_ref>(__first, __last, __value_, __comp); 4205145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 42063e519524SHoward Hinnant} 42073e519524SHoward Hinnant 42083e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 42093e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 42103e519524SHoward Hinnant_ForwardIterator 4211e4383379SHoward Hinnantlower_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 42123e519524SHoward Hinnant{ 4213e4383379SHoward Hinnant return _VSTD::lower_bound(__first, __last, __value_, 42143e519524SHoward Hinnant __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>()); 42153e519524SHoward Hinnant} 42163e519524SHoward Hinnant 42173e519524SHoward Hinnant// upper_bound 42183e519524SHoward Hinnant 42193e519524SHoward Hinnanttemplate <class _Compare, class _ForwardIterator, class _Tp> 42203e519524SHoward Hinnant_ForwardIterator 4221e4383379SHoward Hinnant__upper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 42223e519524SHoward Hinnant{ 42233e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 4224ce48a113SHoward Hinnant difference_type __len = _VSTD::distance(__first, __last); 42253e519524SHoward Hinnant while (__len != 0) 42263e519524SHoward Hinnant { 42273e519524SHoward Hinnant difference_type __l2 = __len / 2; 42283e519524SHoward Hinnant _ForwardIterator __m = __first; 4229ce48a113SHoward Hinnant _VSTD::advance(__m, __l2); 4230e4383379SHoward Hinnant if (__comp(__value_, *__m)) 42313e519524SHoward Hinnant __len = __l2; 42323e519524SHoward Hinnant else 42333e519524SHoward Hinnant { 42343e519524SHoward Hinnant __first = ++__m; 42353e519524SHoward Hinnant __len -= __l2 + 1; 42363e519524SHoward Hinnant } 42373e519524SHoward Hinnant } 42383e519524SHoward Hinnant return __first; 42393e519524SHoward Hinnant} 42403e519524SHoward Hinnant 42413e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp, class _Compare> 42423e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 42433e519524SHoward Hinnant_ForwardIterator 4244e4383379SHoward Hinnantupper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 42453e519524SHoward Hinnant{ 4246145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 42473e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 42483e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 4249e4383379SHoward Hinnant return __upper_bound<_Comp_ref>(__first, __last, __value_, __c); 4250145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 42513e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4252e4383379SHoward Hinnant return __upper_bound<_Comp_ref>(__first, __last, __value_, __comp); 4253145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 42543e519524SHoward Hinnant} 42553e519524SHoward Hinnant 42563e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 42573e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 42583e519524SHoward Hinnant_ForwardIterator 4259e4383379SHoward Hinnantupper_bound(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 42603e519524SHoward Hinnant{ 4261e4383379SHoward Hinnant return _VSTD::upper_bound(__first, __last, __value_, 42623e519524SHoward Hinnant __less<_Tp, typename iterator_traits<_ForwardIterator>::value_type>()); 42633e519524SHoward Hinnant} 42643e519524SHoward Hinnant 42653e519524SHoward Hinnant// equal_range 42663e519524SHoward Hinnant 42673e519524SHoward Hinnanttemplate <class _Compare, class _ForwardIterator, class _Tp> 42683e519524SHoward Hinnantpair<_ForwardIterator, _ForwardIterator> 4269e4383379SHoward Hinnant__equal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 42703e519524SHoward Hinnant{ 42713e519524SHoward Hinnant typedef typename iterator_traits<_ForwardIterator>::difference_type difference_type; 4272ce48a113SHoward Hinnant difference_type __len = _VSTD::distance(__first, __last); 42733e519524SHoward Hinnant while (__len != 0) 42743e519524SHoward Hinnant { 42753e519524SHoward Hinnant difference_type __l2 = __len / 2; 42763e519524SHoward Hinnant _ForwardIterator __m = __first; 4277ce48a113SHoward Hinnant _VSTD::advance(__m, __l2); 4278e4383379SHoward Hinnant if (__comp(*__m, __value_)) 42793e519524SHoward Hinnant { 42803e519524SHoward Hinnant __first = ++__m; 42813e519524SHoward Hinnant __len -= __l2 + 1; 42823e519524SHoward Hinnant } 4283e4383379SHoward Hinnant else if (__comp(__value_, *__m)) 42843e519524SHoward Hinnant { 42853e519524SHoward Hinnant __last = __m; 42863e519524SHoward Hinnant __len = __l2; 42873e519524SHoward Hinnant } 42883e519524SHoward Hinnant else 42893e519524SHoward Hinnant { 42903e519524SHoward Hinnant _ForwardIterator __mp1 = __m; 42913e519524SHoward Hinnant return pair<_ForwardIterator, _ForwardIterator> 42923e519524SHoward Hinnant ( 4293e4383379SHoward Hinnant __lower_bound<_Compare>(__first, __m, __value_, __comp), 4294e4383379SHoward Hinnant __upper_bound<_Compare>(++__mp1, __last, __value_, __comp) 42953e519524SHoward Hinnant ); 42963e519524SHoward Hinnant } 42973e519524SHoward Hinnant } 42983e519524SHoward Hinnant return pair<_ForwardIterator, _ForwardIterator>(__first, __first); 42993e519524SHoward Hinnant} 43003e519524SHoward Hinnant 43013e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp, class _Compare> 43023e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 43033e519524SHoward Hinnantpair<_ForwardIterator, _ForwardIterator> 4304e4383379SHoward Hinnantequal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 43053e519524SHoward Hinnant{ 4306145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 43073e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 43083e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 4309e4383379SHoward Hinnant return __equal_range<_Comp_ref>(__first, __last, __value_, __c); 4310145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 43113e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4312e4383379SHoward Hinnant return __equal_range<_Comp_ref>(__first, __last, __value_, __comp); 4313145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 43143e519524SHoward Hinnant} 43153e519524SHoward Hinnant 43163e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 43173e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 43183e519524SHoward Hinnantpair<_ForwardIterator, _ForwardIterator> 4319e4383379SHoward Hinnantequal_range(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 43203e519524SHoward Hinnant{ 4321e4383379SHoward Hinnant return _VSTD::equal_range(__first, __last, __value_, 43223e519524SHoward Hinnant __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>()); 43233e519524SHoward Hinnant} 43243e519524SHoward Hinnant 43253e519524SHoward Hinnant// binary_search 43263e519524SHoward Hinnant 43273e519524SHoward Hinnanttemplate <class _Compare, class _ForwardIterator, class _Tp> 43283e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 43293e519524SHoward Hinnantbool 4330e4383379SHoward Hinnant__binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 43313e519524SHoward Hinnant{ 4332e4383379SHoward Hinnant __first = __lower_bound<_Compare>(__first, __last, __value_, __comp); 4333e4383379SHoward Hinnant return __first != __last && !__comp(__value_, *__first); 43343e519524SHoward Hinnant} 43353e519524SHoward Hinnant 43363e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp, class _Compare> 43373e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 43383e519524SHoward Hinnantbool 4339e4383379SHoward Hinnantbinary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_, _Compare __comp) 43403e519524SHoward Hinnant{ 4341145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 43423e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 43433e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 4344e4383379SHoward Hinnant return __binary_search<_Comp_ref>(__first, __last, __value_, __c); 4345145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 43463e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4347e4383379SHoward Hinnant return __binary_search<_Comp_ref>(__first, __last, __value_, __comp); 4348145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 43493e519524SHoward Hinnant} 43503e519524SHoward Hinnant 43513e519524SHoward Hinnanttemplate <class _ForwardIterator, class _Tp> 43523e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 43533e519524SHoward Hinnantbool 4354e4383379SHoward Hinnantbinary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value_) 43553e519524SHoward Hinnant{ 4356e4383379SHoward Hinnant return _VSTD::binary_search(__first, __last, __value_, 43573e519524SHoward Hinnant __less<typename iterator_traits<_ForwardIterator>::value_type, _Tp>()); 43583e519524SHoward Hinnant} 43593e519524SHoward Hinnant 43603e519524SHoward Hinnant// merge 43613e519524SHoward Hinnant 43623e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 43633e519524SHoward Hinnant_OutputIterator 43643e519524SHoward Hinnant__merge(_InputIterator1 __first1, _InputIterator1 __last1, 43653e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 43663e519524SHoward Hinnant{ 43673e519524SHoward Hinnant for (; __first1 != __last1; ++__result) 43683e519524SHoward Hinnant { 43693e519524SHoward Hinnant if (__first2 == __last2) 4370ce48a113SHoward Hinnant return _VSTD::copy(__first1, __last1, __result); 43713e519524SHoward Hinnant if (__comp(*__first2, *__first1)) 43723e519524SHoward Hinnant { 43733e519524SHoward Hinnant *__result = *__first2; 43743e519524SHoward Hinnant ++__first2; 43753e519524SHoward Hinnant } 43763e519524SHoward Hinnant else 43773e519524SHoward Hinnant { 43783e519524SHoward Hinnant *__result = *__first1; 43793e519524SHoward Hinnant ++__first1; 43803e519524SHoward Hinnant } 43813e519524SHoward Hinnant } 4382ce48a113SHoward Hinnant return _VSTD::copy(__first2, __last2, __result); 43833e519524SHoward Hinnant} 43843e519524SHoward Hinnant 43853e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 43863e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 43873e519524SHoward Hinnant_OutputIterator 43883e519524SHoward Hinnantmerge(_InputIterator1 __first1, _InputIterator1 __last1, 43893e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 43903e519524SHoward Hinnant{ 4391145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 43923e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 43933e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 4394ce48a113SHoward Hinnant return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 4395145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 43963e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4397ce48a113SHoward Hinnant return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 4398145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 43993e519524SHoward Hinnant} 44003e519524SHoward Hinnant 44013e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator> 44023e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 44033e519524SHoward Hinnant_OutputIterator 44043e519524SHoward Hinnantmerge(_InputIterator1 __first1, _InputIterator1 __last1, 44053e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 44063e519524SHoward Hinnant{ 44073e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator1>::value_type __v1; 44083e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator2>::value_type __v2; 44093e519524SHoward Hinnant return merge(__first1, __last1, __first2, __last2, __result, __less<__v1, __v2>()); 44103e519524SHoward Hinnant} 44113e519524SHoward Hinnant 44123e519524SHoward Hinnant// inplace_merge 44133e519524SHoward Hinnant 4414adfdae18SMarshall Clowtemplate <class _Compare, class _InputIterator1, class _InputIterator2, 4415adfdae18SMarshall Clow class _OutputIterator> 4416adfdae18SMarshall Clowvoid __half_inplace_merge(_InputIterator1 __first1, _InputIterator1 __last1, 4417adfdae18SMarshall Clow _InputIterator2 __first2, _InputIterator2 __last2, 4418adfdae18SMarshall Clow _OutputIterator __result, _Compare __comp) 4419adfdae18SMarshall Clow{ 4420adfdae18SMarshall Clow for (; __first1 != __last1; ++__result) 4421adfdae18SMarshall Clow { 4422adfdae18SMarshall Clow if (__first2 == __last2) 4423adfdae18SMarshall Clow { 4424adfdae18SMarshall Clow _VSTD::move(__first1, __last1, __result); 4425adfdae18SMarshall Clow return; 4426adfdae18SMarshall Clow } 4427adfdae18SMarshall Clow 4428adfdae18SMarshall Clow if (__comp(*__first2, *__first1)) 4429adfdae18SMarshall Clow { 4430adfdae18SMarshall Clow *__result = _VSTD::move(*__first2); 4431adfdae18SMarshall Clow ++__first2; 4432adfdae18SMarshall Clow } 4433adfdae18SMarshall Clow else 4434adfdae18SMarshall Clow { 4435adfdae18SMarshall Clow *__result = _VSTD::move(*__first1); 4436adfdae18SMarshall Clow ++__first1; 4437adfdae18SMarshall Clow } 4438adfdae18SMarshall Clow } 4439adfdae18SMarshall Clow // __first2 through __last2 are already in the right spot. 4440adfdae18SMarshall Clow} 4441adfdae18SMarshall Clow 44423e519524SHoward Hinnanttemplate <class _Compare, class _BidirectionalIterator> 44433e519524SHoward Hinnantvoid 44443e519524SHoward Hinnant__buffered_inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 44453e519524SHoward Hinnant _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, 44463e519524SHoward Hinnant typename iterator_traits<_BidirectionalIterator>::difference_type __len2, 44473e519524SHoward Hinnant typename iterator_traits<_BidirectionalIterator>::value_type* __buff) 44483e519524SHoward Hinnant{ 44493e519524SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 44503e519524SHoward Hinnant __destruct_n __d(0); 44513e519524SHoward Hinnant unique_ptr<value_type, __destruct_n&> __h2(__buff, __d); 44523e519524SHoward Hinnant if (__len1 <= __len2) 44533e519524SHoward Hinnant { 44543e519524SHoward Hinnant value_type* __p = __buff; 4455910285b2SEric Fiselier for (_BidirectionalIterator __i = __first; __i != __middle; __d.__incr((value_type*)0), (void) ++__i, ++__p) 4456ce48a113SHoward Hinnant ::new(__p) value_type(_VSTD::move(*__i)); 4457adfdae18SMarshall Clow __half_inplace_merge(__buff, __p, __middle, __last, __first, __comp); 44583e519524SHoward Hinnant } 44593e519524SHoward Hinnant else 44603e519524SHoward Hinnant { 44613e519524SHoward Hinnant value_type* __p = __buff; 4462910285b2SEric Fiselier for (_BidirectionalIterator __i = __middle; __i != __last; __d.__incr((value_type*)0), (void) ++__i, ++__p) 4463ce48a113SHoward Hinnant ::new(__p) value_type(_VSTD::move(*__i)); 44643e519524SHoward Hinnant typedef reverse_iterator<_BidirectionalIterator> _RBi; 44653e519524SHoward Hinnant typedef reverse_iterator<value_type*> _Rv; 4466adfdae18SMarshall Clow __half_inplace_merge(_Rv(__p), _Rv(__buff), 4467adfdae18SMarshall Clow _RBi(__middle), _RBi(__first), 44683e519524SHoward Hinnant _RBi(__last), __negate<_Compare>(__comp)); 44693e519524SHoward Hinnant } 44703e519524SHoward Hinnant} 44713e519524SHoward Hinnant 44723e519524SHoward Hinnanttemplate <class _Compare, class _BidirectionalIterator> 44733e519524SHoward Hinnantvoid 44743e519524SHoward Hinnant__inplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 44753e519524SHoward Hinnant _Compare __comp, typename iterator_traits<_BidirectionalIterator>::difference_type __len1, 44763e519524SHoward Hinnant typename iterator_traits<_BidirectionalIterator>::difference_type __len2, 44773e519524SHoward Hinnant typename iterator_traits<_BidirectionalIterator>::value_type* __buff, ptrdiff_t __buff_size) 44783e519524SHoward Hinnant{ 44793e519524SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; 44803e519524SHoward Hinnant while (true) 44813e519524SHoward Hinnant { 44823e519524SHoward Hinnant // if __middle == __last, we're done 44833e519524SHoward Hinnant if (__len2 == 0) 44843e519524SHoward Hinnant return; 4485526e0929SMarshall Clow if (__len1 <= __buff_size || __len2 <= __buff_size) 4486526e0929SMarshall Clow return __buffered_inplace_merge<_Compare> 4487526e0929SMarshall Clow (__first, __middle, __last, __comp, __len1, __len2, __buff); 44883e519524SHoward Hinnant // shrink [__first, __middle) as much as possible (with no moves), returning if it shrinks to 0 4489910285b2SEric Fiselier for (; true; ++__first, (void) --__len1) 44903e519524SHoward Hinnant { 44913e519524SHoward Hinnant if (__len1 == 0) 44923e519524SHoward Hinnant return; 44933e519524SHoward Hinnant if (__comp(*__middle, *__first)) 44943e519524SHoward Hinnant break; 44953e519524SHoward Hinnant } 44963e519524SHoward Hinnant // __first < __middle < __last 44973e519524SHoward Hinnant // *__first > *__middle 44983e519524SHoward Hinnant // partition [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) such that 44993e519524SHoward Hinnant // all elements in: 45003e519524SHoward Hinnant // [__first, __m1) <= [__middle, __m2) 45013e519524SHoward Hinnant // [__middle, __m2) < [__m1, __middle) 45023e519524SHoward Hinnant // [__m1, __middle) <= [__m2, __last) 45033e519524SHoward Hinnant // and __m1 or __m2 is in the middle of its range 45043e519524SHoward Hinnant _BidirectionalIterator __m1; // "median" of [__first, __middle) 45053e519524SHoward Hinnant _BidirectionalIterator __m2; // "median" of [__middle, __last) 45063e519524SHoward Hinnant difference_type __len11; // distance(__first, __m1) 45073e519524SHoward Hinnant difference_type __len21; // distance(__middle, __m2) 45083e519524SHoward Hinnant // binary search smaller range 45093e519524SHoward Hinnant if (__len1 < __len2) 45103e519524SHoward Hinnant { // __len >= 1, __len2 >= 2 45113e519524SHoward Hinnant __len21 = __len2 / 2; 45123e519524SHoward Hinnant __m2 = __middle; 4513ce48a113SHoward Hinnant _VSTD::advance(__m2, __len21); 45143e519524SHoward Hinnant __m1 = __upper_bound<_Compare>(__first, __middle, *__m2, __comp); 4515ce48a113SHoward Hinnant __len11 = _VSTD::distance(__first, __m1); 45163e519524SHoward Hinnant } 45173e519524SHoward Hinnant else 45183e519524SHoward Hinnant { 45193e519524SHoward Hinnant if (__len1 == 1) 45203e519524SHoward Hinnant { // __len1 >= __len2 && __len2 > 0, therefore __len2 == 1 45213e519524SHoward Hinnant // It is known *__first > *__middle 45223e519524SHoward Hinnant swap(*__first, *__middle); 45233e519524SHoward Hinnant return; 45243e519524SHoward Hinnant } 45253e519524SHoward Hinnant // __len1 >= 2, __len2 >= 1 45263e519524SHoward Hinnant __len11 = __len1 / 2; 45273e519524SHoward Hinnant __m1 = __first; 4528ce48a113SHoward Hinnant _VSTD::advance(__m1, __len11); 45293e519524SHoward Hinnant __m2 = __lower_bound<_Compare>(__middle, __last, *__m1, __comp); 4530ce48a113SHoward Hinnant __len21 = _VSTD::distance(__middle, __m2); 45313e519524SHoward Hinnant } 45323e519524SHoward Hinnant difference_type __len12 = __len1 - __len11; // distance(__m1, __middle) 45333e519524SHoward Hinnant difference_type __len22 = __len2 - __len21; // distance(__m2, __last) 45343e519524SHoward Hinnant // [__first, __m1) [__m1, __middle) [__middle, __m2) [__m2, __last) 45353e519524SHoward Hinnant // swap middle two partitions 4536ce48a113SHoward Hinnant __middle = _VSTD::rotate(__m1, __middle, __m2); 45373e519524SHoward Hinnant // __len12 and __len21 now have swapped meanings 45383e519524SHoward Hinnant // merge smaller range with recurisve call and larger with tail recursion elimination 45393e519524SHoward Hinnant if (__len11 + __len21 < __len12 + __len22) 45403e519524SHoward Hinnant { 45413e519524SHoward Hinnant __inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); 45423e519524SHoward Hinnant// __inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); 45433e519524SHoward Hinnant __first = __middle; 45443e519524SHoward Hinnant __middle = __m2; 45453e519524SHoward Hinnant __len1 = __len12; 45463e519524SHoward Hinnant __len2 = __len22; 45473e519524SHoward Hinnant } 45483e519524SHoward Hinnant else 45493e519524SHoward Hinnant { 45503e519524SHoward Hinnant __inplace_merge<_Compare>(__middle, __m2, __last, __comp, __len12, __len22, __buff, __buff_size); 45513e519524SHoward Hinnant// __inplace_merge<_Compare>(__first, __m1, __middle, __comp, __len11, __len21, __buff, __buff_size); 45523e519524SHoward Hinnant __last = __middle; 45533e519524SHoward Hinnant __middle = __m1; 45543e519524SHoward Hinnant __len1 = __len11; 45553e519524SHoward Hinnant __len2 = __len21; 45563e519524SHoward Hinnant } 45573e519524SHoward Hinnant } 45583e519524SHoward Hinnant} 45593e519524SHoward Hinnant 45603e519524SHoward Hinnanttemplate <class _BidirectionalIterator, class _Compare> 45613e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 45623e519524SHoward Hinnantvoid 45633e519524SHoward Hinnantinplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last, 45643e519524SHoward Hinnant _Compare __comp) 45653e519524SHoward Hinnant{ 45663e519524SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::value_type value_type; 45673e519524SHoward Hinnant typedef typename iterator_traits<_BidirectionalIterator>::difference_type difference_type; 4568ce48a113SHoward Hinnant difference_type __len1 = _VSTD::distance(__first, __middle); 4569ce48a113SHoward Hinnant difference_type __len2 = _VSTD::distance(__middle, __last); 4570ce48a113SHoward Hinnant difference_type __buf_size = _VSTD::min(__len1, __len2); 45710b48cf9aSMarshall Clow pair<value_type*, ptrdiff_t> __buf = _VSTD::get_temporary_buffer<value_type>(__buf_size); 45720b48cf9aSMarshall Clow unique_ptr<value_type, __return_temporary_buffer> __h(__buf.first); 45730b48cf9aSMarshall Clow 4574145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 45753e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 45763e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 4577ce48a113SHoward Hinnant return _VSTD::__inplace_merge<_Comp_ref>(__first, __middle, __last, __c, __len1, __len2, 45783e519524SHoward Hinnant __buf.first, __buf.second); 4579145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 45803e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 4581ce48a113SHoward Hinnant return _VSTD::__inplace_merge<_Comp_ref>(__first, __middle, __last, __comp, __len1, __len2, 45823e519524SHoward Hinnant __buf.first, __buf.second); 4583145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 45843e519524SHoward Hinnant} 45853e519524SHoward Hinnant 45863e519524SHoward Hinnanttemplate <class _BidirectionalIterator> 45873e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 45883e519524SHoward Hinnantvoid 45893e519524SHoward Hinnantinplace_merge(_BidirectionalIterator __first, _BidirectionalIterator __middle, _BidirectionalIterator __last) 45903e519524SHoward Hinnant{ 4591ce48a113SHoward Hinnant _VSTD::inplace_merge(__first, __middle, __last, 45923e519524SHoward Hinnant __less<typename iterator_traits<_BidirectionalIterator>::value_type>()); 45933e519524SHoward Hinnant} 45943e519524SHoward Hinnant 45953e519524SHoward Hinnant// stable_sort 45963e519524SHoward Hinnant 45973e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2> 45983e519524SHoward Hinnantvoid 45993e519524SHoward Hinnant__merge_move_construct(_InputIterator1 __first1, _InputIterator1 __last1, 46003e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, 46013e519524SHoward Hinnant typename iterator_traits<_InputIterator1>::value_type* __result, _Compare __comp) 46023e519524SHoward Hinnant{ 46033e519524SHoward Hinnant typedef typename iterator_traits<_InputIterator1>::value_type value_type; 46043e519524SHoward Hinnant __destruct_n __d(0); 46053e519524SHoward Hinnant unique_ptr<value_type, __destruct_n&> __h(__result, __d); 46063e519524SHoward Hinnant for (; true; ++__result) 46073e519524SHoward Hinnant { 46083e519524SHoward Hinnant if (__first1 == __last1) 46093e519524SHoward Hinnant { 46103e519524SHoward Hinnant for (; __first2 != __last2; ++__first2, ++__result, __d.__incr((value_type*)0)) 4611ce48a113SHoward Hinnant ::new (__result) value_type(_VSTD::move(*__first2)); 46123e519524SHoward Hinnant __h.release(); 46133e519524SHoward Hinnant return; 46143e519524SHoward Hinnant } 46153e519524SHoward Hinnant if (__first2 == __last2) 46163e519524SHoward Hinnant { 46173e519524SHoward Hinnant for (; __first1 != __last1; ++__first1, ++__result, __d.__incr((value_type*)0)) 4618ce48a113SHoward Hinnant ::new (__result) value_type(_VSTD::move(*__first1)); 46193e519524SHoward Hinnant __h.release(); 46203e519524SHoward Hinnant return; 46213e519524SHoward Hinnant } 46223e519524SHoward Hinnant if (__comp(*__first2, *__first1)) 46233e519524SHoward Hinnant { 4624ce48a113SHoward Hinnant ::new (__result) value_type(_VSTD::move(*__first2)); 46253e519524SHoward Hinnant __d.__incr((value_type*)0); 46263e519524SHoward Hinnant ++__first2; 46273e519524SHoward Hinnant } 46283e519524SHoward Hinnant else 46293e519524SHoward Hinnant { 4630ce48a113SHoward Hinnant ::new (__result) value_type(_VSTD::move(*__first1)); 46313e519524SHoward Hinnant __d.__incr((value_type*)0); 46323e519524SHoward Hinnant ++__first1; 46333e519524SHoward Hinnant } 46343e519524SHoward Hinnant } 46353e519524SHoward Hinnant} 46363e519524SHoward Hinnant 46373e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 46383e519524SHoward Hinnantvoid 46393e519524SHoward Hinnant__merge_move_assign(_InputIterator1 __first1, _InputIterator1 __last1, 46403e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, 46413e519524SHoward Hinnant _OutputIterator __result, _Compare __comp) 46423e519524SHoward Hinnant{ 46433e519524SHoward Hinnant for (; __first1 != __last1; ++__result) 46443e519524SHoward Hinnant { 46453e519524SHoward Hinnant if (__first2 == __last2) 46463e519524SHoward Hinnant { 46473e519524SHoward Hinnant for (; __first1 != __last1; ++__first1, ++__result) 4648ce48a113SHoward Hinnant *__result = _VSTD::move(*__first1); 46493e519524SHoward Hinnant return; 46503e519524SHoward Hinnant } 46513e519524SHoward Hinnant if (__comp(*__first2, *__first1)) 46523e519524SHoward Hinnant { 4653ce48a113SHoward Hinnant *__result = _VSTD::move(*__first2); 46543e519524SHoward Hinnant ++__first2; 46553e519524SHoward Hinnant } 46563e519524SHoward Hinnant else 46573e519524SHoward Hinnant { 4658ce48a113SHoward Hinnant *__result = _VSTD::move(*__first1); 46593e519524SHoward Hinnant ++__first1; 46603e519524SHoward Hinnant } 46613e519524SHoward Hinnant } 46623e519524SHoward Hinnant for (; __first2 != __last2; ++__first2, ++__result) 4663ce48a113SHoward Hinnant *__result = _VSTD::move(*__first2); 46643e519524SHoward Hinnant} 46653e519524SHoward Hinnant 46663e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 46673e519524SHoward Hinnantvoid 46683e519524SHoward Hinnant__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 46693e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __len, 46703e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size); 46713e519524SHoward Hinnant 46723e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 46733e519524SHoward Hinnantvoid 46743e519524SHoward Hinnant__stable_sort_move(_RandomAccessIterator __first1, _RandomAccessIterator __last1, _Compare __comp, 46753e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __len, 46763e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::value_type* __first2) 46773e519524SHoward Hinnant{ 46783e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 46793e519524SHoward Hinnant switch (__len) 46803e519524SHoward Hinnant { 46813e519524SHoward Hinnant case 0: 46823e519524SHoward Hinnant return; 46833e519524SHoward Hinnant case 1: 4684ce48a113SHoward Hinnant ::new(__first2) value_type(_VSTD::move(*__first1)); 46853e519524SHoward Hinnant return; 46863e519524SHoward Hinnant case 2: 46873e519524SHoward Hinnant __destruct_n __d(0); 46883e519524SHoward Hinnant unique_ptr<value_type, __destruct_n&> __h2(__first2, __d); 46893e519524SHoward Hinnant if (__comp(*--__last1, *__first1)) 46903e519524SHoward Hinnant { 4691ce48a113SHoward Hinnant ::new(__first2) value_type(_VSTD::move(*__last1)); 46923e519524SHoward Hinnant __d.__incr((value_type*)0); 46933e519524SHoward Hinnant ++__first2; 4694ce48a113SHoward Hinnant ::new(__first2) value_type(_VSTD::move(*__first1)); 46953e519524SHoward Hinnant } 46963e519524SHoward Hinnant else 46973e519524SHoward Hinnant { 4698ce48a113SHoward Hinnant ::new(__first2) value_type(_VSTD::move(*__first1)); 46993e519524SHoward Hinnant __d.__incr((value_type*)0); 47003e519524SHoward Hinnant ++__first2; 4701ce48a113SHoward Hinnant ::new(__first2) value_type(_VSTD::move(*__last1)); 47023e519524SHoward Hinnant } 47033e519524SHoward Hinnant __h2.release(); 47043e519524SHoward Hinnant return; 47053e519524SHoward Hinnant } 47063e519524SHoward Hinnant if (__len <= 8) 47073e519524SHoward Hinnant { 47083e519524SHoward Hinnant __insertion_sort_move<_Compare>(__first1, __last1, __first2, __comp); 47093e519524SHoward Hinnant return; 47103e519524SHoward Hinnant } 47113e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; 47123e519524SHoward Hinnant _RandomAccessIterator __m = __first1 + __l2; 47133e519524SHoward Hinnant __stable_sort<_Compare>(__first1, __m, __comp, __l2, __first2, __l2); 47143e519524SHoward Hinnant __stable_sort<_Compare>(__m, __last1, __comp, __len - __l2, __first2 + __l2, __len - __l2); 47153e519524SHoward Hinnant __merge_move_construct<_Compare>(__first1, __m, __m, __last1, __first2, __comp); 47163e519524SHoward Hinnant} 47173e519524SHoward Hinnant 47183e519524SHoward Hinnanttemplate <class _Tp> 47193e519524SHoward Hinnantstruct __stable_sort_switch 47203e519524SHoward Hinnant{ 4721ca740483SHoward Hinnant static const unsigned value = 128*is_trivially_copy_assignable<_Tp>::value; 47223e519524SHoward Hinnant}; 47233e519524SHoward Hinnant 47243e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 47253e519524SHoward Hinnantvoid 47263e519524SHoward Hinnant__stable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 47273e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __len, 47283e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::value_type* __buff, ptrdiff_t __buff_size) 47293e519524SHoward Hinnant{ 47303e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 47313e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 47323e519524SHoward Hinnant switch (__len) 47333e519524SHoward Hinnant { 47343e519524SHoward Hinnant case 0: 47353e519524SHoward Hinnant case 1: 47363e519524SHoward Hinnant return; 47373e519524SHoward Hinnant case 2: 47383e519524SHoward Hinnant if (__comp(*--__last, *__first)) 47393e519524SHoward Hinnant swap(*__first, *__last); 47403e519524SHoward Hinnant return; 47413e519524SHoward Hinnant } 47423e519524SHoward Hinnant if (__len <= static_cast<difference_type>(__stable_sort_switch<value_type>::value)) 47433e519524SHoward Hinnant { 47443e519524SHoward Hinnant __insertion_sort<_Compare>(__first, __last, __comp); 47453e519524SHoward Hinnant return; 47463e519524SHoward Hinnant } 47473e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __l2 = __len / 2; 47483e519524SHoward Hinnant _RandomAccessIterator __m = __first + __l2; 47493e519524SHoward Hinnant if (__len <= __buff_size) 47503e519524SHoward Hinnant { 47513e519524SHoward Hinnant __destruct_n __d(0); 47523e519524SHoward Hinnant unique_ptr<value_type, __destruct_n&> __h2(__buff, __d); 47533e519524SHoward Hinnant __stable_sort_move<_Compare>(__first, __m, __comp, __l2, __buff); 47543e519524SHoward Hinnant __d.__set(__l2, (value_type*)0); 47553e519524SHoward Hinnant __stable_sort_move<_Compare>(__m, __last, __comp, __len - __l2, __buff + __l2); 47563e519524SHoward Hinnant __d.__set(__len, (value_type*)0); 47573e519524SHoward Hinnant __merge_move_assign<_Compare>(__buff, __buff + __l2, __buff + __l2, __buff + __len, __first, __comp); 47583e519524SHoward Hinnant// __merge<_Compare>(move_iterator<value_type*>(__buff), 47593e519524SHoward Hinnant// move_iterator<value_type*>(__buff + __l2), 47603e519524SHoward Hinnant// move_iterator<_RandomAccessIterator>(__buff + __l2), 47613e519524SHoward Hinnant// move_iterator<_RandomAccessIterator>(__buff + __len), 47623e519524SHoward Hinnant// __first, __comp); 47633e519524SHoward Hinnant return; 47643e519524SHoward Hinnant } 47653e519524SHoward Hinnant __stable_sort<_Compare>(__first, __m, __comp, __l2, __buff, __buff_size); 47663e519524SHoward Hinnant __stable_sort<_Compare>(__m, __last, __comp, __len - __l2, __buff, __buff_size); 47673e519524SHoward Hinnant __inplace_merge<_Compare>(__first, __m, __last, __comp, __l2, __len - __l2, __buff, __buff_size); 47683e519524SHoward Hinnant} 47693e519524SHoward Hinnant 47703e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 47713e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 47723e519524SHoward Hinnantvoid 47733e519524SHoward Hinnantstable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 47743e519524SHoward Hinnant{ 47753e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 47763e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 47773e519524SHoward Hinnant difference_type __len = __last - __first; 47783e519524SHoward Hinnant pair<value_type*, ptrdiff_t> __buf(0, 0); 47793e519524SHoward Hinnant unique_ptr<value_type, __return_temporary_buffer> __h; 47803e519524SHoward Hinnant if (__len > static_cast<difference_type>(__stable_sort_switch<value_type>::value)) 47813e519524SHoward Hinnant { 4782ce48a113SHoward Hinnant __buf = _VSTD::get_temporary_buffer<value_type>(__len); 47833e519524SHoward Hinnant __h.reset(__buf.first); 47843e519524SHoward Hinnant } 4785145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 47863e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 47873e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 47883e519524SHoward Hinnant __stable_sort<_Comp_ref>(__first, __last, __c, __len, __buf.first, __buf.second); 4789145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 47903e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 47913e519524SHoward Hinnant __stable_sort<_Comp_ref>(__first, __last, __comp, __len, __buf.first, __buf.second); 4792145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 47933e519524SHoward Hinnant} 47943e519524SHoward Hinnant 47953e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 47963e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 47973e519524SHoward Hinnantvoid 47983e519524SHoward Hinnantstable_sort(_RandomAccessIterator __first, _RandomAccessIterator __last) 47993e519524SHoward Hinnant{ 4800ce48a113SHoward Hinnant _VSTD::stable_sort(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 48013e519524SHoward Hinnant} 48023e519524SHoward Hinnant 48033e519524SHoward Hinnant// is_heap_until 48043e519524SHoward Hinnant 48053e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 48063e519524SHoward Hinnant_RandomAccessIterator 48073e519524SHoward Hinnantis_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 48083e519524SHoward Hinnant{ 4809ce48a113SHoward Hinnant typedef typename _VSTD::iterator_traits<_RandomAccessIterator>::difference_type difference_type; 48103e519524SHoward Hinnant difference_type __len = __last - __first; 48113e519524SHoward Hinnant difference_type __p = 0; 48123e519524SHoward Hinnant difference_type __c = 1; 48133e519524SHoward Hinnant _RandomAccessIterator __pp = __first; 48143e519524SHoward Hinnant while (__c < __len) 48153e519524SHoward Hinnant { 48163e519524SHoward Hinnant _RandomAccessIterator __cp = __first + __c; 48173e519524SHoward Hinnant if (__comp(*__pp, *__cp)) 48183e519524SHoward Hinnant return __cp; 48193e519524SHoward Hinnant ++__c; 48203e519524SHoward Hinnant ++__cp; 48213e519524SHoward Hinnant if (__c == __len) 48223e519524SHoward Hinnant return __last; 48233e519524SHoward Hinnant if (__comp(*__pp, *__cp)) 48243e519524SHoward Hinnant return __cp; 48253e519524SHoward Hinnant ++__p; 48263e519524SHoward Hinnant ++__pp; 48273e519524SHoward Hinnant __c = 2 * __p + 1; 48283e519524SHoward Hinnant } 48293e519524SHoward Hinnant return __last; 48303e519524SHoward Hinnant} 48313e519524SHoward Hinnant 48323e519524SHoward Hinnanttemplate<class _RandomAccessIterator> 48333e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 48343e519524SHoward Hinnant_RandomAccessIterator 48353e519524SHoward Hinnantis_heap_until(_RandomAccessIterator __first, _RandomAccessIterator __last) 48363e519524SHoward Hinnant{ 4837ce48a113SHoward Hinnant return _VSTD::is_heap_until(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 48383e519524SHoward Hinnant} 48393e519524SHoward Hinnant 48403e519524SHoward Hinnant// is_heap 48413e519524SHoward Hinnant 48423e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 48433e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 48443e519524SHoward Hinnantbool 48453e519524SHoward Hinnantis_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 48463e519524SHoward Hinnant{ 4847ce48a113SHoward Hinnant return _VSTD::is_heap_until(__first, __last, __comp) == __last; 48483e519524SHoward Hinnant} 48493e519524SHoward Hinnant 48503e519524SHoward Hinnanttemplate<class _RandomAccessIterator> 48513e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 48523e519524SHoward Hinnantbool 48533e519524SHoward Hinnantis_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 48543e519524SHoward Hinnant{ 4855ce48a113SHoward Hinnant return _VSTD::is_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 48563e519524SHoward Hinnant} 48573e519524SHoward Hinnant 48583e519524SHoward Hinnant// push_heap 48593e519524SHoward Hinnant 48603e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 48613e519524SHoward Hinnantvoid 48628b512602SDavid Majnemer__sift_up(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 48633e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __len) 48643e519524SHoward Hinnant{ 48653e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 48663e519524SHoward Hinnant if (__len > 1) 48673e519524SHoward Hinnant { 48683e519524SHoward Hinnant __len = (__len - 2) / 2; 48693e519524SHoward Hinnant _RandomAccessIterator __ptr = __first + __len; 48703e519524SHoward Hinnant if (__comp(*__ptr, *--__last)) 48713e519524SHoward Hinnant { 4872ce48a113SHoward Hinnant value_type __t(_VSTD::move(*__last)); 48733e519524SHoward Hinnant do 48743e519524SHoward Hinnant { 4875ce48a113SHoward Hinnant *__last = _VSTD::move(*__ptr); 48763e519524SHoward Hinnant __last = __ptr; 48773e519524SHoward Hinnant if (__len == 0) 48783e519524SHoward Hinnant break; 48793e519524SHoward Hinnant __len = (__len - 1) / 2; 48803e519524SHoward Hinnant __ptr = __first + __len; 48813e519524SHoward Hinnant } while (__comp(*__ptr, __t)); 4882ce48a113SHoward Hinnant *__last = _VSTD::move(__t); 48833e519524SHoward Hinnant } 48843e519524SHoward Hinnant } 48853e519524SHoward Hinnant} 48863e519524SHoward Hinnant 48873e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 48883e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 48893e519524SHoward Hinnantvoid 48903e519524SHoward Hinnantpush_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 48913e519524SHoward Hinnant{ 4892145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 48933e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 48943e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 48958b512602SDavid Majnemer __sift_up<_Comp_ref>(__first, __last, __c, __last - __first); 4896145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 48973e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 48988b512602SDavid Majnemer __sift_up<_Comp_ref>(__first, __last, __comp, __last - __first); 4899145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 49003e519524SHoward Hinnant} 49013e519524SHoward Hinnant 49023e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 49033e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 49043e519524SHoward Hinnantvoid 49053e519524SHoward Hinnantpush_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 49063e519524SHoward Hinnant{ 4907ce48a113SHoward Hinnant _VSTD::push_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 49083e519524SHoward Hinnant} 49093e519524SHoward Hinnant 49103e519524SHoward Hinnant// pop_heap 49113e519524SHoward Hinnant 49123e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 49138b512602SDavid Majnemervoid 4914fd838227SEric Fiselier__sift_down(_RandomAccessIterator __first, _RandomAccessIterator /*__last*/, 4915fd838227SEric Fiselier _Compare __comp, 49168b512602SDavid Majnemer typename iterator_traits<_RandomAccessIterator>::difference_type __len, 49178b512602SDavid Majnemer _RandomAccessIterator __start) 49188b512602SDavid Majnemer{ 49198b512602SDavid Majnemer typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 49208b512602SDavid Majnemer typedef typename iterator_traits<_RandomAccessIterator>::value_type value_type; 49218b512602SDavid Majnemer // left-child of __start is at 2 * __start + 1 49228b512602SDavid Majnemer // right-child of __start is at 2 * __start + 2 49238b512602SDavid Majnemer difference_type __child = __start - __first; 49248b512602SDavid Majnemer 49258b512602SDavid Majnemer if (__len < 2 || (__len - 2) / 2 < __child) 49268b512602SDavid Majnemer return; 49278b512602SDavid Majnemer 49288b512602SDavid Majnemer __child = 2 * __child + 1; 49298b512602SDavid Majnemer _RandomAccessIterator __child_i = __first + __child; 49308b512602SDavid Majnemer 49318b512602SDavid Majnemer if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { 49328b512602SDavid Majnemer // right-child exists and is greater than left-child 49338b512602SDavid Majnemer ++__child_i; 49348b512602SDavid Majnemer ++__child; 49358b512602SDavid Majnemer } 49368b512602SDavid Majnemer 49378b512602SDavid Majnemer // check if we are in heap-order 49388b512602SDavid Majnemer if (__comp(*__child_i, *__start)) 49398b512602SDavid Majnemer // we are, __start is larger than it's largest child 49408b512602SDavid Majnemer return; 49418b512602SDavid Majnemer 49428b512602SDavid Majnemer value_type __top(_VSTD::move(*__start)); 49438b512602SDavid Majnemer do 49448b512602SDavid Majnemer { 49458b512602SDavid Majnemer // we are not in heap-order, swap the parent with it's largest child 49468b512602SDavid Majnemer *__start = _VSTD::move(*__child_i); 49478b512602SDavid Majnemer __start = __child_i; 49488b512602SDavid Majnemer 49498b512602SDavid Majnemer if ((__len - 2) / 2 < __child) 49508b512602SDavid Majnemer break; 49518b512602SDavid Majnemer 49528b512602SDavid Majnemer // recompute the child based off of the updated parent 49538b512602SDavid Majnemer __child = 2 * __child + 1; 49548b512602SDavid Majnemer __child_i = __first + __child; 49558b512602SDavid Majnemer 49568b512602SDavid Majnemer if ((__child + 1) < __len && __comp(*__child_i, *(__child_i + 1))) { 49578b512602SDavid Majnemer // right-child exists and is greater than left-child 49588b512602SDavid Majnemer ++__child_i; 49598b512602SDavid Majnemer ++__child; 49608b512602SDavid Majnemer } 49618b512602SDavid Majnemer 49628b512602SDavid Majnemer // check if we are in heap-order 49638b512602SDavid Majnemer } while (!__comp(*__child_i, __top)); 49648b512602SDavid Majnemer *__start = _VSTD::move(__top); 49658b512602SDavid Majnemer} 49668b512602SDavid Majnemer 49678b512602SDavid Majnemertemplate <class _Compare, class _RandomAccessIterator> 49683e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 49693e519524SHoward Hinnantvoid 49703e519524SHoward Hinnant__pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp, 49713e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __len) 49723e519524SHoward Hinnant{ 49733e519524SHoward Hinnant if (__len > 1) 49743e519524SHoward Hinnant { 49753e519524SHoward Hinnant swap(*__first, *--__last); 49768b512602SDavid Majnemer __sift_down<_Compare>(__first, __last, __comp, __len - 1, __first); 49773e519524SHoward Hinnant } 49783e519524SHoward Hinnant} 49793e519524SHoward Hinnant 49803e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 49813e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 49823e519524SHoward Hinnantvoid 49833e519524SHoward Hinnantpop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 49843e519524SHoward Hinnant{ 4985145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 49863e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 49873e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 49883e519524SHoward Hinnant __pop_heap<_Comp_ref>(__first, __last, __c, __last - __first); 4989145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 49903e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 49913e519524SHoward Hinnant __pop_heap<_Comp_ref>(__first, __last, __comp, __last - __first); 4992145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 49933e519524SHoward Hinnant} 49943e519524SHoward Hinnant 49953e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 49963e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 49973e519524SHoward Hinnantvoid 49983e519524SHoward Hinnantpop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 49993e519524SHoward Hinnant{ 5000ce48a113SHoward Hinnant _VSTD::pop_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 50013e519524SHoward Hinnant} 50023e519524SHoward Hinnant 50033e519524SHoward Hinnant// make_heap 50043e519524SHoward Hinnant 50053e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 50063e519524SHoward Hinnantvoid 50073e519524SHoward Hinnant__make_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 50083e519524SHoward Hinnant{ 50093e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 50103e519524SHoward Hinnant difference_type __n = __last - __first; 50113e519524SHoward Hinnant if (__n > 1) 50123e519524SHoward Hinnant { 50138b512602SDavid Majnemer // start from the first parent, there is no need to consider children 50148b512602SDavid Majnemer for (difference_type __start = (__n - 2) / 2; __start >= 0; --__start) 50158b512602SDavid Majnemer { 50168b512602SDavid Majnemer __sift_down<_Compare>(__first, __last, __comp, __n, __first + __start); 50178b512602SDavid Majnemer } 50183e519524SHoward Hinnant } 50193e519524SHoward Hinnant} 50203e519524SHoward Hinnant 50213e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 50223e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 50233e519524SHoward Hinnantvoid 50243e519524SHoward Hinnantmake_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 50253e519524SHoward Hinnant{ 5026145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 50273e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 50283e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 50293e519524SHoward Hinnant __make_heap<_Comp_ref>(__first, __last, __c); 5030145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 50313e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 50323e519524SHoward Hinnant __make_heap<_Comp_ref>(__first, __last, __comp); 5033145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 50343e519524SHoward Hinnant} 50353e519524SHoward Hinnant 50363e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 50373e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 50383e519524SHoward Hinnantvoid 50393e519524SHoward Hinnantmake_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 50403e519524SHoward Hinnant{ 5041ce48a113SHoward Hinnant _VSTD::make_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 50423e519524SHoward Hinnant} 50433e519524SHoward Hinnant 50443e519524SHoward Hinnant// sort_heap 50453e519524SHoward Hinnant 50463e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 50473e519524SHoward Hinnantvoid 50483e519524SHoward Hinnant__sort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 50493e519524SHoward Hinnant{ 50503e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 50513e519524SHoward Hinnant for (difference_type __n = __last - __first; __n > 1; --__last, --__n) 50523e519524SHoward Hinnant __pop_heap<_Compare>(__first, __last, __comp, __n); 50533e519524SHoward Hinnant} 50543e519524SHoward Hinnant 50553e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 50563e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 50573e519524SHoward Hinnantvoid 50583e519524SHoward Hinnantsort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp) 50593e519524SHoward Hinnant{ 5060145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 50613e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 50623e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 50633e519524SHoward Hinnant __sort_heap<_Comp_ref>(__first, __last, __c); 5064145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 50653e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 50663e519524SHoward Hinnant __sort_heap<_Comp_ref>(__first, __last, __comp); 5067145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 50683e519524SHoward Hinnant} 50693e519524SHoward Hinnant 50703e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 50713e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 50723e519524SHoward Hinnantvoid 50733e519524SHoward Hinnantsort_heap(_RandomAccessIterator __first, _RandomAccessIterator __last) 50743e519524SHoward Hinnant{ 5075ce48a113SHoward Hinnant _VSTD::sort_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 50763e519524SHoward Hinnant} 50773e519524SHoward Hinnant 50783e519524SHoward Hinnant// partial_sort 50793e519524SHoward Hinnant 50803e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 50813e519524SHoward Hinnantvoid 50823e519524SHoward Hinnant__partial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, 50833e519524SHoward Hinnant _Compare __comp) 50843e519524SHoward Hinnant{ 50853e519524SHoward Hinnant __make_heap<_Compare>(__first, __middle, __comp); 50863e519524SHoward Hinnant typename iterator_traits<_RandomAccessIterator>::difference_type __len = __middle - __first; 50873e519524SHoward Hinnant for (_RandomAccessIterator __i = __middle; __i != __last; ++__i) 50883e519524SHoward Hinnant { 50893e519524SHoward Hinnant if (__comp(*__i, *__first)) 50903e519524SHoward Hinnant { 50913e519524SHoward Hinnant swap(*__i, *__first); 50928b512602SDavid Majnemer __sift_down<_Compare>(__first, __middle, __comp, __len, __first); 50933e519524SHoward Hinnant } 50943e519524SHoward Hinnant } 50953e519524SHoward Hinnant __sort_heap<_Compare>(__first, __middle, __comp); 50963e519524SHoward Hinnant} 50973e519524SHoward Hinnant 50983e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 50993e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 51003e519524SHoward Hinnantvoid 51013e519524SHoward Hinnantpartial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last, 51023e519524SHoward Hinnant _Compare __comp) 51033e519524SHoward Hinnant{ 5104145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 51053e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 51063e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 51073e519524SHoward Hinnant __partial_sort<_Comp_ref>(__first, __middle, __last, __c); 5108145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 51093e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 51103e519524SHoward Hinnant __partial_sort<_Comp_ref>(__first, __middle, __last, __comp); 5111145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 51123e519524SHoward Hinnant} 51133e519524SHoward Hinnant 51143e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 51153e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 51163e519524SHoward Hinnantvoid 51173e519524SHoward Hinnantpartial_sort(_RandomAccessIterator __first, _RandomAccessIterator __middle, _RandomAccessIterator __last) 51183e519524SHoward Hinnant{ 5119ce48a113SHoward Hinnant _VSTD::partial_sort(__first, __middle, __last, 51203e519524SHoward Hinnant __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 51213e519524SHoward Hinnant} 51223e519524SHoward Hinnant 51233e519524SHoward Hinnant// partial_sort_copy 51243e519524SHoward Hinnant 51253e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator, class _RandomAccessIterator> 51263e519524SHoward Hinnant_RandomAccessIterator 51273e519524SHoward Hinnant__partial_sort_copy(_InputIterator __first, _InputIterator __last, 51283e519524SHoward Hinnant _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) 51293e519524SHoward Hinnant{ 51303e519524SHoward Hinnant _RandomAccessIterator __r = __result_first; 51313e519524SHoward Hinnant if (__r != __result_last) 51323e519524SHoward Hinnant { 5133910285b2SEric Fiselier for (; __first != __last && __r != __result_last; (void) ++__first, ++__r) 51343e519524SHoward Hinnant *__r = *__first; 51353e519524SHoward Hinnant __make_heap<_Compare>(__result_first, __r, __comp); 51368b512602SDavid Majnemer typename iterator_traits<_RandomAccessIterator>::difference_type __len = __r - __result_first; 51373e519524SHoward Hinnant for (; __first != __last; ++__first) 51383e519524SHoward Hinnant if (__comp(*__first, *__result_first)) 51393e519524SHoward Hinnant { 51403e519524SHoward Hinnant *__result_first = *__first; 51418b512602SDavid Majnemer __sift_down<_Compare>(__result_first, __r, __comp, __len, __result_first); 51423e519524SHoward Hinnant } 51433e519524SHoward Hinnant __sort_heap<_Compare>(__result_first, __r, __comp); 51443e519524SHoward Hinnant } 51453e519524SHoward Hinnant return __r; 51463e519524SHoward Hinnant} 51473e519524SHoward Hinnant 51483e519524SHoward Hinnanttemplate <class _InputIterator, class _RandomAccessIterator, class _Compare> 51493e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 51503e519524SHoward Hinnant_RandomAccessIterator 51513e519524SHoward Hinnantpartial_sort_copy(_InputIterator __first, _InputIterator __last, 51523e519524SHoward Hinnant _RandomAccessIterator __result_first, _RandomAccessIterator __result_last, _Compare __comp) 51533e519524SHoward Hinnant{ 5154145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 51553e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 51563e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 51573e519524SHoward Hinnant return __partial_sort_copy<_Comp_ref>(__first, __last, __result_first, __result_last, __c); 5158145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 51593e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 51603e519524SHoward Hinnant return __partial_sort_copy<_Comp_ref>(__first, __last, __result_first, __result_last, __comp); 5161145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 51623e519524SHoward Hinnant} 51633e519524SHoward Hinnant 51643e519524SHoward Hinnanttemplate <class _InputIterator, class _RandomAccessIterator> 51653e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 51663e519524SHoward Hinnant_RandomAccessIterator 51673e519524SHoward Hinnantpartial_sort_copy(_InputIterator __first, _InputIterator __last, 51683e519524SHoward Hinnant _RandomAccessIterator __result_first, _RandomAccessIterator __result_last) 51693e519524SHoward Hinnant{ 5170ce48a113SHoward Hinnant return _VSTD::partial_sort_copy(__first, __last, __result_first, __result_last, 51713e519524SHoward Hinnant __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 51723e519524SHoward Hinnant} 51733e519524SHoward Hinnant 51743e519524SHoward Hinnant// nth_element 51753e519524SHoward Hinnant 51763e519524SHoward Hinnanttemplate <class _Compare, class _RandomAccessIterator> 51773e519524SHoward Hinnantvoid 51783e519524SHoward Hinnant__nth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) 51793e519524SHoward Hinnant{ 51803e519524SHoward Hinnant // _Compare is known to be a reference type 51813e519524SHoward Hinnant typedef typename iterator_traits<_RandomAccessIterator>::difference_type difference_type; 51823e519524SHoward Hinnant const difference_type __limit = 7; 51833e519524SHoward Hinnant while (true) 51843e519524SHoward Hinnant { 51853e519524SHoward Hinnant __restart: 5186b34b4819SHoward Hinnant if (__nth == __last) 5187b34b4819SHoward Hinnant return; 51883e519524SHoward Hinnant difference_type __len = __last - __first; 51893e519524SHoward Hinnant switch (__len) 51903e519524SHoward Hinnant { 51913e519524SHoward Hinnant case 0: 51923e519524SHoward Hinnant case 1: 51933e519524SHoward Hinnant return; 51943e519524SHoward Hinnant case 2: 51953e519524SHoward Hinnant if (__comp(*--__last, *__first)) 51963e519524SHoward Hinnant swap(*__first, *__last); 51973e519524SHoward Hinnant return; 51983e519524SHoward Hinnant case 3: 51993e519524SHoward Hinnant { 52003e519524SHoward Hinnant _RandomAccessIterator __m = __first; 5201ce48a113SHoward Hinnant _VSTD::__sort3<_Compare>(__first, ++__m, --__last, __comp); 52023e519524SHoward Hinnant return; 52033e519524SHoward Hinnant } 52043e519524SHoward Hinnant } 52053e519524SHoward Hinnant if (__len <= __limit) 52063e519524SHoward Hinnant { 52073e519524SHoward Hinnant __selection_sort<_Compare>(__first, __last, __comp); 52083e519524SHoward Hinnant return; 52093e519524SHoward Hinnant } 52103e519524SHoward Hinnant // __len > __limit >= 3 52113e519524SHoward Hinnant _RandomAccessIterator __m = __first + __len/2; 52123e519524SHoward Hinnant _RandomAccessIterator __lm1 = __last; 5213ce48a113SHoward Hinnant unsigned __n_swaps = _VSTD::__sort3<_Compare>(__first, __m, --__lm1, __comp); 52143e519524SHoward Hinnant // *__m is median 52153e519524SHoward Hinnant // partition [__first, __m) < *__m and *__m <= [__m, __last) 52163e519524SHoward Hinnant // (this inhibits tossing elements equivalent to __m around unnecessarily) 52173e519524SHoward Hinnant _RandomAccessIterator __i = __first; 52183e519524SHoward Hinnant _RandomAccessIterator __j = __lm1; 52193e519524SHoward Hinnant // j points beyond range to be tested, *__lm1 is known to be <= *__m 52203e519524SHoward Hinnant // The search going up is known to be guarded but the search coming down isn't. 52213e519524SHoward Hinnant // Prime the downward search with a guard. 52223e519524SHoward Hinnant if (!__comp(*__i, *__m)) // if *__first == *__m 52233e519524SHoward Hinnant { 52243e519524SHoward Hinnant // *__first == *__m, *__first doesn't go in first part 52253e519524SHoward Hinnant // manually guard downward moving __j against __i 52263e519524SHoward Hinnant while (true) 52273e519524SHoward Hinnant { 52283e519524SHoward Hinnant if (__i == --__j) 52293e519524SHoward Hinnant { 52303e519524SHoward Hinnant // *__first == *__m, *__m <= all other elements 52313e519524SHoward Hinnant // Parition instead into [__first, __i) == *__first and *__first < [__i, __last) 52323e519524SHoward Hinnant ++__i; // __first + 1 52333e519524SHoward Hinnant __j = __last; 52343e519524SHoward Hinnant if (!__comp(*__first, *--__j)) // we need a guard if *__first == *(__last-1) 52353e519524SHoward Hinnant { 52363e519524SHoward Hinnant while (true) 52373e519524SHoward Hinnant { 52383e519524SHoward Hinnant if (__i == __j) 52393e519524SHoward Hinnant return; // [__first, __last) all equivalent elements 52403e519524SHoward Hinnant if (__comp(*__first, *__i)) 52413e519524SHoward Hinnant { 52423e519524SHoward Hinnant swap(*__i, *__j); 52433e519524SHoward Hinnant ++__n_swaps; 52443e519524SHoward Hinnant ++__i; 52453e519524SHoward Hinnant break; 52463e519524SHoward Hinnant } 52473e519524SHoward Hinnant ++__i; 52483e519524SHoward Hinnant } 52493e519524SHoward Hinnant } 52503e519524SHoward Hinnant // [__first, __i) == *__first and *__first < [__j, __last) and __j == __last - 1 52513e519524SHoward Hinnant if (__i == __j) 52523e519524SHoward Hinnant return; 52533e519524SHoward Hinnant while (true) 52543e519524SHoward Hinnant { 52553e519524SHoward Hinnant while (!__comp(*__first, *__i)) 52563e519524SHoward Hinnant ++__i; 52573e519524SHoward Hinnant while (__comp(*__first, *--__j)) 52583e519524SHoward Hinnant ; 52593e519524SHoward Hinnant if (__i >= __j) 52603e519524SHoward Hinnant break; 52613e519524SHoward Hinnant swap(*__i, *__j); 52623e519524SHoward Hinnant ++__n_swaps; 52633e519524SHoward Hinnant ++__i; 52643e519524SHoward Hinnant } 52653e519524SHoward Hinnant // [__first, __i) == *__first and *__first < [__i, __last) 52663e519524SHoward Hinnant // The first part is sorted, 52673e519524SHoward Hinnant if (__nth < __i) 52683e519524SHoward Hinnant return; 52693e519524SHoward Hinnant // __nth_element the secod part 52703e519524SHoward Hinnant // __nth_element<_Compare>(__i, __nth, __last, __comp); 52713e519524SHoward Hinnant __first = __i; 52723e519524SHoward Hinnant goto __restart; 52733e519524SHoward Hinnant } 52743e519524SHoward Hinnant if (__comp(*__j, *__m)) 52753e519524SHoward Hinnant { 52763e519524SHoward Hinnant swap(*__i, *__j); 52773e519524SHoward Hinnant ++__n_swaps; 52783e519524SHoward Hinnant break; // found guard for downward moving __j, now use unguarded partition 52793e519524SHoward Hinnant } 52803e519524SHoward Hinnant } 52813e519524SHoward Hinnant } 52823e519524SHoward Hinnant ++__i; 52833e519524SHoward Hinnant // j points beyond range to be tested, *__lm1 is known to be <= *__m 52843e519524SHoward Hinnant // if not yet partitioned... 52853e519524SHoward Hinnant if (__i < __j) 52863e519524SHoward Hinnant { 52873e519524SHoward Hinnant // known that *(__i - 1) < *__m 52883e519524SHoward Hinnant while (true) 52893e519524SHoward Hinnant { 52903e519524SHoward Hinnant // __m still guards upward moving __i 52913e519524SHoward Hinnant while (__comp(*__i, *__m)) 52923e519524SHoward Hinnant ++__i; 52933e519524SHoward Hinnant // It is now known that a guard exists for downward moving __j 52943e519524SHoward Hinnant while (!__comp(*--__j, *__m)) 52953e519524SHoward Hinnant ; 52963e519524SHoward Hinnant if (__i >= __j) 52973e519524SHoward Hinnant break; 52983e519524SHoward Hinnant swap(*__i, *__j); 52993e519524SHoward Hinnant ++__n_swaps; 53003e519524SHoward Hinnant // It is known that __m != __j 53013e519524SHoward Hinnant // If __m just moved, follow it 53023e519524SHoward Hinnant if (__m == __i) 53033e519524SHoward Hinnant __m = __j; 53043e519524SHoward Hinnant ++__i; 53053e519524SHoward Hinnant } 53063e519524SHoward Hinnant } 53073e519524SHoward Hinnant // [__first, __i) < *__m and *__m <= [__i, __last) 53083e519524SHoward Hinnant if (__i != __m && __comp(*__m, *__i)) 53093e519524SHoward Hinnant { 53103e519524SHoward Hinnant swap(*__i, *__m); 53113e519524SHoward Hinnant ++__n_swaps; 53123e519524SHoward Hinnant } 53133e519524SHoward Hinnant // [__first, __i) < *__i and *__i <= [__i+1, __last) 53143e519524SHoward Hinnant if (__nth == __i) 53153e519524SHoward Hinnant return; 53163e519524SHoward Hinnant if (__n_swaps == 0) 53173e519524SHoward Hinnant { 53183e519524SHoward Hinnant // We were given a perfectly partitioned sequence. Coincidence? 53193e519524SHoward Hinnant if (__nth < __i) 53203e519524SHoward Hinnant { 53213e519524SHoward Hinnant // Check for [__first, __i) already sorted 53223e519524SHoward Hinnant __j = __m = __first; 53233e519524SHoward Hinnant while (++__j != __i) 53243e519524SHoward Hinnant { 53253e519524SHoward Hinnant if (__comp(*__j, *__m)) 53263e519524SHoward Hinnant // not yet sorted, so sort 53273e519524SHoward Hinnant goto not_sorted; 53283e519524SHoward Hinnant __m = __j; 53293e519524SHoward Hinnant } 53303e519524SHoward Hinnant // [__first, __i) sorted 53313e519524SHoward Hinnant return; 53323e519524SHoward Hinnant } 53333e519524SHoward Hinnant else 53343e519524SHoward Hinnant { 53353e519524SHoward Hinnant // Check for [__i, __last) already sorted 53363e519524SHoward Hinnant __j = __m = __i; 53373e519524SHoward Hinnant while (++__j != __last) 53383e519524SHoward Hinnant { 53393e519524SHoward Hinnant if (__comp(*__j, *__m)) 53403e519524SHoward Hinnant // not yet sorted, so sort 53413e519524SHoward Hinnant goto not_sorted; 53423e519524SHoward Hinnant __m = __j; 53433e519524SHoward Hinnant } 53443e519524SHoward Hinnant // [__i, __last) sorted 53453e519524SHoward Hinnant return; 53463e519524SHoward Hinnant } 53473e519524SHoward Hinnant } 53483e519524SHoward Hinnantnot_sorted: 53493e519524SHoward Hinnant // __nth_element on range containing __nth 53503e519524SHoward Hinnant if (__nth < __i) 53513e519524SHoward Hinnant { 53523e519524SHoward Hinnant // __nth_element<_Compare>(__first, __nth, __i, __comp); 53533e519524SHoward Hinnant __last = __i; 53543e519524SHoward Hinnant } 53553e519524SHoward Hinnant else 53563e519524SHoward Hinnant { 53573e519524SHoward Hinnant // __nth_element<_Compare>(__i+1, __nth, __last, __comp); 53583e519524SHoward Hinnant __first = ++__i; 53593e519524SHoward Hinnant } 53603e519524SHoward Hinnant } 53613e519524SHoward Hinnant} 53623e519524SHoward Hinnant 53633e519524SHoward Hinnanttemplate <class _RandomAccessIterator, class _Compare> 53643e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 53653e519524SHoward Hinnantvoid 53663e519524SHoward Hinnantnth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last, _Compare __comp) 53673e519524SHoward Hinnant{ 5368145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 53693e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 53703e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 53713e519524SHoward Hinnant __nth_element<_Comp_ref>(__first, __nth, __last, __c); 5372145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 53733e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 53743e519524SHoward Hinnant __nth_element<_Comp_ref>(__first, __nth, __last, __comp); 5375145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 53763e519524SHoward Hinnant} 53773e519524SHoward Hinnant 53783e519524SHoward Hinnanttemplate <class _RandomAccessIterator> 53793e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 53803e519524SHoward Hinnantvoid 53813e519524SHoward Hinnantnth_element(_RandomAccessIterator __first, _RandomAccessIterator __nth, _RandomAccessIterator __last) 53823e519524SHoward Hinnant{ 5383ce48a113SHoward Hinnant _VSTD::nth_element(__first, __nth, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>()); 53843e519524SHoward Hinnant} 53853e519524SHoward Hinnant 53863e519524SHoward Hinnant// includes 53873e519524SHoward Hinnant 53883e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2> 53893e519524SHoward Hinnantbool 53903e519524SHoward Hinnant__includes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 53913e519524SHoward Hinnant _Compare __comp) 53923e519524SHoward Hinnant{ 53933e519524SHoward Hinnant for (; __first2 != __last2; ++__first1) 53943e519524SHoward Hinnant { 53953e519524SHoward Hinnant if (__first1 == __last1 || __comp(*__first2, *__first1)) 53963e519524SHoward Hinnant return false; 53973e519524SHoward Hinnant if (!__comp(*__first1, *__first2)) 53983e519524SHoward Hinnant ++__first2; 53993e519524SHoward Hinnant } 54003e519524SHoward Hinnant return true; 54013e519524SHoward Hinnant} 54023e519524SHoward Hinnant 54033e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _Compare> 54043e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 54053e519524SHoward Hinnantbool 54063e519524SHoward Hinnantincludes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 54073e519524SHoward Hinnant _Compare __comp) 54083e519524SHoward Hinnant{ 5409145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 54103e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 54113e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 54123e519524SHoward Hinnant return __includes<_Comp_ref>(__first1, __last1, __first2, __last2, __c); 5413145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 54143e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 54153e519524SHoward Hinnant return __includes<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); 5416145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 54173e519524SHoward Hinnant} 54183e519524SHoward Hinnant 54193e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2> 54203e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 54213e519524SHoward Hinnantbool 54223e519524SHoward Hinnantincludes(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) 54233e519524SHoward Hinnant{ 5424ce48a113SHoward Hinnant return _VSTD::includes(__first1, __last1, __first2, __last2, 54253e519524SHoward Hinnant __less<typename iterator_traits<_InputIterator1>::value_type, 54263e519524SHoward Hinnant typename iterator_traits<_InputIterator2>::value_type>()); 54273e519524SHoward Hinnant} 54283e519524SHoward Hinnant 54293e519524SHoward Hinnant// set_union 54303e519524SHoward Hinnant 54313e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 54323e519524SHoward Hinnant_OutputIterator 54333e519524SHoward Hinnant__set_union(_InputIterator1 __first1, _InputIterator1 __last1, 54343e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 54353e519524SHoward Hinnant{ 54363e519524SHoward Hinnant for (; __first1 != __last1; ++__result) 54373e519524SHoward Hinnant { 54383e519524SHoward Hinnant if (__first2 == __last2) 5439ce48a113SHoward Hinnant return _VSTD::copy(__first1, __last1, __result); 54403e519524SHoward Hinnant if (__comp(*__first2, *__first1)) 54413e519524SHoward Hinnant { 54423e519524SHoward Hinnant *__result = *__first2; 54433e519524SHoward Hinnant ++__first2; 54443e519524SHoward Hinnant } 54453e519524SHoward Hinnant else 54463e519524SHoward Hinnant { 54473e519524SHoward Hinnant *__result = *__first1; 54483e519524SHoward Hinnant if (!__comp(*__first1, *__first2)) 54493e519524SHoward Hinnant ++__first2; 54503e519524SHoward Hinnant ++__first1; 54513e519524SHoward Hinnant } 54523e519524SHoward Hinnant } 5453ce48a113SHoward Hinnant return _VSTD::copy(__first2, __last2, __result); 54543e519524SHoward Hinnant} 54553e519524SHoward Hinnant 54563e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 54573e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 54583e519524SHoward Hinnant_OutputIterator 54593e519524SHoward Hinnantset_union(_InputIterator1 __first1, _InputIterator1 __last1, 54603e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 54613e519524SHoward Hinnant{ 5462145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 54633e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 54643e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 54653e519524SHoward Hinnant return __set_union<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5466145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 54673e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 54683e519524SHoward Hinnant return __set_union<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5469145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 54703e519524SHoward Hinnant} 54713e519524SHoward Hinnant 54723e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator> 54733e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 54743e519524SHoward Hinnant_OutputIterator 54753e519524SHoward Hinnantset_union(_InputIterator1 __first1, _InputIterator1 __last1, 54763e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 54773e519524SHoward Hinnant{ 5478ce48a113SHoward Hinnant return _VSTD::set_union(__first1, __last1, __first2, __last2, __result, 54793e519524SHoward Hinnant __less<typename iterator_traits<_InputIterator1>::value_type, 54803e519524SHoward Hinnant typename iterator_traits<_InputIterator2>::value_type>()); 54813e519524SHoward Hinnant} 54823e519524SHoward Hinnant 54833e519524SHoward Hinnant// set_intersection 54843e519524SHoward Hinnant 54853e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 54863e519524SHoward Hinnant_OutputIterator 54873e519524SHoward Hinnant__set_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 54883e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 54893e519524SHoward Hinnant{ 54903e519524SHoward Hinnant while (__first1 != __last1 && __first2 != __last2) 54913e519524SHoward Hinnant { 54923e519524SHoward Hinnant if (__comp(*__first1, *__first2)) 54933e519524SHoward Hinnant ++__first1; 54943e519524SHoward Hinnant else 54953e519524SHoward Hinnant { 54963e519524SHoward Hinnant if (!__comp(*__first2, *__first1)) 54973e519524SHoward Hinnant { 54983e519524SHoward Hinnant *__result = *__first1; 54993e519524SHoward Hinnant ++__result; 55003e519524SHoward Hinnant ++__first1; 55013e519524SHoward Hinnant } 55023e519524SHoward Hinnant ++__first2; 55033e519524SHoward Hinnant } 55043e519524SHoward Hinnant } 55053e519524SHoward Hinnant return __result; 55063e519524SHoward Hinnant} 55073e519524SHoward Hinnant 55083e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 55093e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 55103e519524SHoward Hinnant_OutputIterator 55113e519524SHoward Hinnantset_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 55123e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 55133e519524SHoward Hinnant{ 5514145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 55153e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 55163e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 55173e519524SHoward Hinnant return __set_intersection<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5518145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 55193e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 55203e519524SHoward Hinnant return __set_intersection<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5521145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 55223e519524SHoward Hinnant} 55233e519524SHoward Hinnant 55243e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator> 55253e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 55263e519524SHoward Hinnant_OutputIterator 55273e519524SHoward Hinnantset_intersection(_InputIterator1 __first1, _InputIterator1 __last1, 55283e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 55293e519524SHoward Hinnant{ 5530ce48a113SHoward Hinnant return _VSTD::set_intersection(__first1, __last1, __first2, __last2, __result, 55313e519524SHoward Hinnant __less<typename iterator_traits<_InputIterator1>::value_type, 55323e519524SHoward Hinnant typename iterator_traits<_InputIterator2>::value_type>()); 55333e519524SHoward Hinnant} 55343e519524SHoward Hinnant 55353e519524SHoward Hinnant// set_difference 55363e519524SHoward Hinnant 55373e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 55383e519524SHoward Hinnant_OutputIterator 55393e519524SHoward Hinnant__set_difference(_InputIterator1 __first1, _InputIterator1 __last1, 55403e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 55413e519524SHoward Hinnant{ 55423e519524SHoward Hinnant while (__first1 != __last1) 55433e519524SHoward Hinnant { 55443e519524SHoward Hinnant if (__first2 == __last2) 5545ce48a113SHoward Hinnant return _VSTD::copy(__first1, __last1, __result); 55463e519524SHoward Hinnant if (__comp(*__first1, *__first2)) 55473e519524SHoward Hinnant { 55483e519524SHoward Hinnant *__result = *__first1; 55493e519524SHoward Hinnant ++__result; 55503e519524SHoward Hinnant ++__first1; 55513e519524SHoward Hinnant } 55523e519524SHoward Hinnant else 55533e519524SHoward Hinnant { 55543e519524SHoward Hinnant if (!__comp(*__first2, *__first1)) 55553e519524SHoward Hinnant ++__first1; 55563e519524SHoward Hinnant ++__first2; 55573e519524SHoward Hinnant } 55583e519524SHoward Hinnant } 55593e519524SHoward Hinnant return __result; 55603e519524SHoward Hinnant} 55613e519524SHoward Hinnant 55623e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 55633e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 55643e519524SHoward Hinnant_OutputIterator 55653e519524SHoward Hinnantset_difference(_InputIterator1 __first1, _InputIterator1 __last1, 55663e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 55673e519524SHoward Hinnant{ 5568145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 55693e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 55703e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 55713e519524SHoward Hinnant return __set_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5572145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 55733e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 55743e519524SHoward Hinnant return __set_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5575145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 55763e519524SHoward Hinnant} 55773e519524SHoward Hinnant 55783e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator> 55793e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 55803e519524SHoward Hinnant_OutputIterator 55813e519524SHoward Hinnantset_difference(_InputIterator1 __first1, _InputIterator1 __last1, 55823e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 55833e519524SHoward Hinnant{ 5584ce48a113SHoward Hinnant return _VSTD::set_difference(__first1, __last1, __first2, __last2, __result, 55853e519524SHoward Hinnant __less<typename iterator_traits<_InputIterator1>::value_type, 55863e519524SHoward Hinnant typename iterator_traits<_InputIterator2>::value_type>()); 55873e519524SHoward Hinnant} 55883e519524SHoward Hinnant 55893e519524SHoward Hinnant// set_symmetric_difference 55903e519524SHoward Hinnant 55913e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator> 55923e519524SHoward Hinnant_OutputIterator 55933e519524SHoward Hinnant__set_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 55943e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 55953e519524SHoward Hinnant{ 55963e519524SHoward Hinnant while (__first1 != __last1) 55973e519524SHoward Hinnant { 55983e519524SHoward Hinnant if (__first2 == __last2) 5599ce48a113SHoward Hinnant return _VSTD::copy(__first1, __last1, __result); 56003e519524SHoward Hinnant if (__comp(*__first1, *__first2)) 56013e519524SHoward Hinnant { 56023e519524SHoward Hinnant *__result = *__first1; 56033e519524SHoward Hinnant ++__result; 56043e519524SHoward Hinnant ++__first1; 56053e519524SHoward Hinnant } 56063e519524SHoward Hinnant else 56073e519524SHoward Hinnant { 56083e519524SHoward Hinnant if (__comp(*__first2, *__first1)) 56093e519524SHoward Hinnant { 56103e519524SHoward Hinnant *__result = *__first2; 56113e519524SHoward Hinnant ++__result; 56123e519524SHoward Hinnant } 56133e519524SHoward Hinnant else 56143e519524SHoward Hinnant ++__first1; 56153e519524SHoward Hinnant ++__first2; 56163e519524SHoward Hinnant } 56173e519524SHoward Hinnant } 5618ce48a113SHoward Hinnant return _VSTD::copy(__first2, __last2, __result); 56193e519524SHoward Hinnant} 56203e519524SHoward Hinnant 56213e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare> 56223e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 56233e519524SHoward Hinnant_OutputIterator 56243e519524SHoward Hinnantset_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 56253e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp) 56263e519524SHoward Hinnant{ 5627145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 56283e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 56293e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 56303e519524SHoward Hinnant return __set_symmetric_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __c); 5631145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 56323e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 56333e519524SHoward Hinnant return __set_symmetric_difference<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp); 5634145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 56353e519524SHoward Hinnant} 56363e519524SHoward Hinnant 56373e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _OutputIterator> 56383e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 56393e519524SHoward Hinnant_OutputIterator 56403e519524SHoward Hinnantset_symmetric_difference(_InputIterator1 __first1, _InputIterator1 __last1, 56413e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result) 56423e519524SHoward Hinnant{ 5643ce48a113SHoward Hinnant return _VSTD::set_symmetric_difference(__first1, __last1, __first2, __last2, __result, 56443e519524SHoward Hinnant __less<typename iterator_traits<_InputIterator1>::value_type, 56453e519524SHoward Hinnant typename iterator_traits<_InputIterator2>::value_type>()); 56463e519524SHoward Hinnant} 56473e519524SHoward Hinnant 56483e519524SHoward Hinnant// lexicographical_compare 56493e519524SHoward Hinnant 56503e519524SHoward Hinnanttemplate <class _Compare, class _InputIterator1, class _InputIterator2> 56513e519524SHoward Hinnantbool 56523e519524SHoward Hinnant__lexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 56533e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) 56543e519524SHoward Hinnant{ 5655910285b2SEric Fiselier for (; __first2 != __last2; ++__first1, (void) ++__first2) 56563e519524SHoward Hinnant { 56573e519524SHoward Hinnant if (__first1 == __last1 || __comp(*__first1, *__first2)) 56583e519524SHoward Hinnant return true; 56593e519524SHoward Hinnant if (__comp(*__first2, *__first1)) 56603e519524SHoward Hinnant return false; 56613e519524SHoward Hinnant } 56623e519524SHoward Hinnant return false; 56633e519524SHoward Hinnant} 56643e519524SHoward Hinnant 56653e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2, class _Compare> 56663e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 56673e519524SHoward Hinnantbool 56683e519524SHoward Hinnantlexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 56693e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2, _Compare __comp) 56703e519524SHoward Hinnant{ 5671145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 56723e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 56733e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 56743e519524SHoward Hinnant return __lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __c); 5675145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 56763e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 56773e519524SHoward Hinnant return __lexicographical_compare<_Comp_ref>(__first1, __last1, __first2, __last2, __comp); 5678145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 56793e519524SHoward Hinnant} 56803e519524SHoward Hinnant 56813e519524SHoward Hinnanttemplate <class _InputIterator1, class _InputIterator2> 56823e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 56833e519524SHoward Hinnantbool 56843e519524SHoward Hinnantlexicographical_compare(_InputIterator1 __first1, _InputIterator1 __last1, 56853e519524SHoward Hinnant _InputIterator2 __first2, _InputIterator2 __last2) 56863e519524SHoward Hinnant{ 5687ce48a113SHoward Hinnant return _VSTD::lexicographical_compare(__first1, __last1, __first2, __last2, 56883e519524SHoward Hinnant __less<typename iterator_traits<_InputIterator1>::value_type, 56893e519524SHoward Hinnant typename iterator_traits<_InputIterator2>::value_type>()); 56903e519524SHoward Hinnant} 56913e519524SHoward Hinnant 56923e519524SHoward Hinnant// next_permutation 56933e519524SHoward Hinnant 56943e519524SHoward Hinnanttemplate <class _Compare, class _BidirectionalIterator> 56953e519524SHoward Hinnantbool 56963e519524SHoward Hinnant__next_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 56973e519524SHoward Hinnant{ 56983e519524SHoward Hinnant _BidirectionalIterator __i = __last; 56993e519524SHoward Hinnant if (__first == __last || __first == --__i) 57003e519524SHoward Hinnant return false; 57013e519524SHoward Hinnant while (true) 57023e519524SHoward Hinnant { 57033e519524SHoward Hinnant _BidirectionalIterator __ip1 = __i; 57043e519524SHoward Hinnant if (__comp(*--__i, *__ip1)) 57053e519524SHoward Hinnant { 57063e519524SHoward Hinnant _BidirectionalIterator __j = __last; 57073e519524SHoward Hinnant while (!__comp(*__i, *--__j)) 57083e519524SHoward Hinnant ; 57093e519524SHoward Hinnant swap(*__i, *__j); 5710ce48a113SHoward Hinnant _VSTD::reverse(__ip1, __last); 57113e519524SHoward Hinnant return true; 57123e519524SHoward Hinnant } 57133e519524SHoward Hinnant if (__i == __first) 57143e519524SHoward Hinnant { 5715ce48a113SHoward Hinnant _VSTD::reverse(__first, __last); 57163e519524SHoward Hinnant return false; 57173e519524SHoward Hinnant } 57183e519524SHoward Hinnant } 57193e519524SHoward Hinnant} 57203e519524SHoward Hinnant 57213e519524SHoward Hinnanttemplate <class _BidirectionalIterator, class _Compare> 57223e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 57233e519524SHoward Hinnantbool 57243e519524SHoward Hinnantnext_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 57253e519524SHoward Hinnant{ 5726145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 57273e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 57283e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 57293e519524SHoward Hinnant return __next_permutation<_Comp_ref>(__first, __last, __c); 5730145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 57313e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 57323e519524SHoward Hinnant return __next_permutation<_Comp_ref>(__first, __last, __comp); 5733145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 57343e519524SHoward Hinnant} 57353e519524SHoward Hinnant 57363e519524SHoward Hinnanttemplate <class _BidirectionalIterator> 57373e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 57383e519524SHoward Hinnantbool 57393e519524SHoward Hinnantnext_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) 57403e519524SHoward Hinnant{ 5741ce48a113SHoward Hinnant return _VSTD::next_permutation(__first, __last, 57423e519524SHoward Hinnant __less<typename iterator_traits<_BidirectionalIterator>::value_type>()); 57433e519524SHoward Hinnant} 57443e519524SHoward Hinnant 57453e519524SHoward Hinnant// prev_permutation 57463e519524SHoward Hinnant 57473e519524SHoward Hinnanttemplate <class _Compare, class _BidirectionalIterator> 57483e519524SHoward Hinnantbool 57493e519524SHoward Hinnant__prev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 57503e519524SHoward Hinnant{ 57513e519524SHoward Hinnant _BidirectionalIterator __i = __last; 57523e519524SHoward Hinnant if (__first == __last || __first == --__i) 57533e519524SHoward Hinnant return false; 57543e519524SHoward Hinnant while (true) 57553e519524SHoward Hinnant { 57563e519524SHoward Hinnant _BidirectionalIterator __ip1 = __i; 57573e519524SHoward Hinnant if (__comp(*__ip1, *--__i)) 57583e519524SHoward Hinnant { 57593e519524SHoward Hinnant _BidirectionalIterator __j = __last; 57603e519524SHoward Hinnant while (!__comp(*--__j, *__i)) 57613e519524SHoward Hinnant ; 57623e519524SHoward Hinnant swap(*__i, *__j); 5763ce48a113SHoward Hinnant _VSTD::reverse(__ip1, __last); 57643e519524SHoward Hinnant return true; 57653e519524SHoward Hinnant } 57663e519524SHoward Hinnant if (__i == __first) 57673e519524SHoward Hinnant { 5768ce48a113SHoward Hinnant _VSTD::reverse(__first, __last); 57693e519524SHoward Hinnant return false; 57703e519524SHoward Hinnant } 57713e519524SHoward Hinnant } 57723e519524SHoward Hinnant} 57733e519524SHoward Hinnant 57743e519524SHoward Hinnanttemplate <class _BidirectionalIterator, class _Compare> 57753e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 57763e519524SHoward Hinnantbool 57773e519524SHoward Hinnantprev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last, _Compare __comp) 57783e519524SHoward Hinnant{ 5779145afa17SHoward Hinnant#ifdef _LIBCPP_DEBUG 57803e519524SHoward Hinnant typedef typename add_lvalue_reference<__debug_less<_Compare> >::type _Comp_ref; 57813e519524SHoward Hinnant __debug_less<_Compare> __c(__comp); 57823e519524SHoward Hinnant return __prev_permutation<_Comp_ref>(__first, __last, __c); 5783145afa17SHoward Hinnant#else // _LIBCPP_DEBUG 57843e519524SHoward Hinnant typedef typename add_lvalue_reference<_Compare>::type _Comp_ref; 57853e519524SHoward Hinnant return __prev_permutation<_Comp_ref>(__first, __last, __comp); 5786145afa17SHoward Hinnant#endif // _LIBCPP_DEBUG 57873e519524SHoward Hinnant} 57883e519524SHoward Hinnant 57893e519524SHoward Hinnanttemplate <class _BidirectionalIterator> 57903e519524SHoward Hinnantinline _LIBCPP_INLINE_VISIBILITY 57913e519524SHoward Hinnantbool 57923e519524SHoward Hinnantprev_permutation(_BidirectionalIterator __first, _BidirectionalIterator __last) 57933e519524SHoward Hinnant{ 5794ce48a113SHoward Hinnant return _VSTD::prev_permutation(__first, __last, 57953e519524SHoward Hinnant __less<typename iterator_traits<_BidirectionalIterator>::value_type>()); 57963e519524SHoward Hinnant} 57973e519524SHoward Hinnant 57983e519524SHoward Hinnant_LIBCPP_END_NAMESPACE_STD 57993e519524SHoward Hinnant 58003e519524SHoward Hinnant#endif // _LIBCPP_ALGORITHM 5801