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<InputIterator Iter, class T> 13eb564e76cc3904d811c981a50ecce0659f444cc9Howard Hinnant// requires HasEqualTo<Iter::value_type, T> 140dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow// constexpr Iter::difference_type // constexpr after C++17 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// count(Iter first, Iter last, const T& value); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <algorithm> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 200dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow#include "test_macros.h" 2183e2c4d877fe2d7793868b1c6a5d9525a7c4d431Marshall Clow#include "test_iterators.h" 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 230dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow#if TEST_STD_VER > 17 240dc8ca7729554881a146c8cc6eca2658853f6d83Marshall ClowTEST_CONSTEXPR bool test_constexpr() { 250dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow int ia[] = {0, 1, 2, 2, 0, 1, 2, 3}; 260dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow int ib[] = {1, 2, 3, 4, 5, 6}; 270dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow return (std::count(std::begin(ia), std::end(ia), 2) == 3) 280dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow && (std::count(std::begin(ib), std::end(ib), 9) == 0) 290dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow ; 300dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow } 310dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow#endif 320dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant int ia[] = {0, 1, 2, 2, 0, 1, 2, 3}; 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const unsigned sa = sizeof(ia)/sizeof(ia[0]); 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::count(input_iterator<const int*>(ia), 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant input_iterator<const int*>(ia + sa), 2) == 3); 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::count(input_iterator<const int*>(ia), 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant input_iterator<const int*>(ia + sa), 7) == 0); 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(std::count(input_iterator<const int*>(ia), 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant input_iterator<const int*>(ia), 2) == 0); 430dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow 440dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow#if TEST_STD_VER > 17 450dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow static_assert(test_constexpr()); 460dc8ca7729554881a146c8cc6eca2658853f6d83Marshall Clow#endif 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 48