1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <algorithm> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12eb564e76cc3904d811c981a50ecce0659f444cc9Howard Hinnant// template<ForwardIterator Iter> 13eb564e76cc3904d811c981a50ecce0659f444cc9Howard Hinnant// requires LessThanComparable<Iter::value_type> 14eb564e76cc3904d811c981a50ecce0659f444cc9Howard Hinnant// pair<Iter, Iter> 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// minmax_element(Iter first, Iter last); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <algorithm> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 2083e2c4d877fe2d7793868b1c6a5d9525a7c4d431Marshall Clow#include "test_iterators.h" 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class Iter> 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantvoid 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttest(Iter first, Iter last) 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::pair<Iter, Iter> p = std::minmax_element(first, last); 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant if (first != last) 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant for (Iter j = first; j != last; ++j) 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!(*j < *p.first)); 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!(*p.second < *j)); 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant else 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(p.first == last); 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(p.second == last); 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class Iter> 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantvoid 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttest(unsigned N) 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant int* a = new int[N]; 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant for (int i = 0; i < N; ++i) 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant a[i] = i; 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::random_shuffle(a, a+N); 50eb564e76cc3904d811c981a50ecce0659f444cc9Howard Hinnant test(Iter(a), Iter(a+N)); 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant delete [] a; 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class Iter> 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantvoid 56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttest() 57bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 58bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<Iter>(0); 59bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<Iter>(1); 60bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<Iter>(2); 61bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<Iter>(3); 62bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<Iter>(10); 63bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<Iter>(1000); 64bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 65bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const unsigned N = 100; 66bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant int* a = new int[N]; 67bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant for (int i = 0; i < N; ++i) 68bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant a[i] = 5; 69bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::random_shuffle(a, a+N); 70bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::pair<Iter, Iter> p = std::minmax_element(Iter(a), Iter(a+N)); 71bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(base(p.first) == a); 72bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(base(p.second) == a+N-1); 73bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant delete [] a; 74bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 75bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 76bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 77bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 78bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 79bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<forward_iterator<const int*> >(); 80bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<bidirectional_iterator<const int*> >(); 81bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<random_access_iterator<const int*> >(); 82bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test<const int*>(); 83bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 84