1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <algorithm> 11 12 // template<ForwardIterator Iter, class T> 13 // requires OutputIterator<Iter, RvalueOf<Iter::reference>::type> 14 // && HasEqualTo<Iter::value_type, T> 15 // constexpr Iter // constexpr after C++17 16 // remove(Iter first, Iter last, const T& value); 17 18 #include <algorithm> 19 #include <cassert> 20 #include <memory> 21 22 #include "test_macros.h" 23 #include "test_iterators.h" 24 25 #if TEST_STD_VER > 17 26 TEST_CONSTEXPR bool test_constexpr() { 27 int ia[] = {1, 3, 5, 2, 5, 6}; 28 29 auto it = std::remove(std::begin(ia), std::end(ia), 5); 30 31 return (std::begin(ia) + std::size(ia) - 2) == it // we removed two elements 32 && std::none_of(std::begin(ia), it, [](int a) {return a == 5; }) 33 ; 34 } 35 #endif 36 37 template <class Iter> 38 void 39 test() 40 { 41 int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2}; 42 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 43 Iter r = std::remove(Iter(ia), Iter(ia+sa), 2); 44 assert(base(r) == ia + sa-3); 45 assert(ia[0] == 0); 46 assert(ia[1] == 1); 47 assert(ia[2] == 3); 48 assert(ia[3] == 4); 49 assert(ia[4] == 3); 50 assert(ia[5] == 4); 51 } 52 53 #if TEST_STD_VER >= 11 54 template <class Iter> 55 void 56 test1() 57 { 58 const unsigned sa = 9; 59 std::unique_ptr<int> ia[sa]; 60 ia[0].reset(new int(0)); 61 ia[1].reset(new int(1)); 62 ia[3].reset(new int(3)); 63 ia[4].reset(new int(4)); 64 ia[6].reset(new int(3)); 65 ia[7].reset(new int(4)); 66 Iter r = std::remove(Iter(ia), Iter(ia+sa), std::unique_ptr<int>()); 67 assert(base(r) == ia + sa-3); 68 assert(*ia[0] == 0); 69 assert(*ia[1] == 1); 70 assert(*ia[2] == 3); 71 assert(*ia[3] == 4); 72 assert(*ia[4] == 3); 73 assert(*ia[5] == 4); 74 } 75 #endif // TEST_STD_VER >= 11 76 77 int main() 78 { 79 test<forward_iterator<int*> >(); 80 test<bidirectional_iterator<int*> >(); 81 test<random_access_iterator<int*> >(); 82 test<int*>(); 83 84 #if TEST_STD_VER >= 11 85 test1<forward_iterator<std::unique_ptr<int>*> >(); 86 test1<bidirectional_iterator<std::unique_ptr<int>*> >(); 87 test1<random_access_iterator<std::unique_ptr<int>*> >(); 88 test1<std::unique_ptr<int>*>(); 89 #endif // TEST_STD_VER >= 11 90 91 #if TEST_STD_VER > 17 92 static_assert(test_constexpr()); 93 #endif 94 } 95
