1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <algorithm> 10 11 // template<ForwardIterator Iter, class T> 12 // requires OutputIterator<Iter, RvalueOf<Iter::reference>::type> 13 // && HasEqualTo<Iter::value_type, T> 14 // constexpr Iter // constexpr after C++17 15 // remove(Iter first, Iter last, const T& value); 16 17 #include <algorithm> 18 #include <cassert> 19 #include <memory> 20 21 #include "test_macros.h" 22 #include "test_iterators.h" 23 24 #if TEST_STD_VER > 17 25 TEST_CONSTEXPR bool test_constexpr() { 26 int ia[] = {1, 3, 5, 2, 5, 6}; 27 28 auto it = std::remove(std::begin(ia), std::end(ia), 5); 29 30 return (std::begin(ia) + std::size(ia) - 2) == it // we removed two elements 31 && std::none_of(std::begin(ia), it, [](int a) {return a == 5; }) 32 ; 33 } 34 #endif 35 36 template <class Iter> 37 void 38 test() 39 { 40 int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2}; 41 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 42 Iter r = std::remove(Iter(ia), Iter(ia+sa), 2); 43 assert(base(r) == ia + sa-3); 44 assert(ia[0] == 0); 45 assert(ia[1] == 1); 46 assert(ia[2] == 3); 47 assert(ia[3] == 4); 48 assert(ia[4] == 3); 49 assert(ia[5] == 4); 50 } 51 52 #if TEST_STD_VER >= 11 53 template <class Iter> 54 void 55 test1() 56 { 57 const unsigned sa = 9; 58 std::unique_ptr<int> ia[sa]; 59 ia[0].reset(new int(0)); 60 ia[1].reset(new int(1)); 61 ia[3].reset(new int(3)); 62 ia[4].reset(new int(4)); 63 ia[6].reset(new int(3)); 64 ia[7].reset(new int(4)); 65 Iter r = std::remove(Iter(ia), Iter(ia+sa), std::unique_ptr<int>()); 66 assert(base(r) == ia + sa-3); 67 assert(*ia[0] == 0); 68 assert(*ia[1] == 1); 69 assert(*ia[2] == 3); 70 assert(*ia[3] == 4); 71 assert(*ia[4] == 3); 72 assert(*ia[5] == 4); 73 } 74 #endif // TEST_STD_VER >= 11 75 76 int main() 77 { 78 test<forward_iterator<int*> >(); 79 test<bidirectional_iterator<int*> >(); 80 test<random_access_iterator<int*> >(); 81 test<int*>(); 82 83 #if TEST_STD_VER >= 11 84 test1<forward_iterator<std::unique_ptr<int>*> >(); 85 test1<bidirectional_iterator<std::unique_ptr<int>*> >(); 86 test1<random_access_iterator<std::unique_ptr<int>*> >(); 87 test1<std::unique_ptr<int>*>(); 88 #endif // TEST_STD_VER >= 11 89 90 #if TEST_STD_VER > 17 91 static_assert(test_constexpr()); 92 #endif 93 } 94