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<InputIterator InIter, class OutIter> 12 // requires OutputIterator<OutIter, RvalueOf<InIter::value_type>::type> 13 // && EqualityComparable<InIter::value_type> 14 // && HasAssign<InIter::value_type, InIter::reference> 15 // && Constructible<InIter::value_type, InIter::reference> 16 // constexpr OutIter // constexpr after C++17 17 // unique_copy(InIter first, InIter last, OutIter result); 18 19 #include <algorithm> 20 #include <cassert> 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[] = {0, 1, 2, 2, 4}; 28 int ib[] = {0, 0, 0, 0, 0}; 29 const int expected[] = {0, 1, 2, 4}; 30 31 auto it = std::unique_copy(std::begin(ia), std::end(ia), std::begin(ib)); 32 return it == (std::begin(ib) + std::size(expected)) 33 && *it == 0 // don't overwrite final value in output 34 && std::equal(std::begin(ib), it, std::begin(expected), std::end(expected)) 35 ; 36 } 37 #endif 38 39 template <class InIter, class OutIter> 40 void 41 test() 42 { 43 const int ia[] = {0}; 44 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 45 int ja[sa] = {-1}; 46 OutIter r = std::unique_copy(InIter(ia), InIter(ia+sa), OutIter(ja)); 47 assert(base(r) == ja + sa); 48 assert(ja[0] == 0); 49 50 const int ib[] = {0, 1}; 51 const unsigned sb = sizeof(ib)/sizeof(ib[0]); 52 int jb[sb] = {-1}; 53 r = std::unique_copy(InIter(ib), InIter(ib+sb), OutIter(jb)); 54 assert(base(r) == jb + sb); 55 assert(jb[0] == 0); 56 assert(jb[1] == 1); 57 58 const int ic[] = {0, 0}; 59 const unsigned sc = sizeof(ic)/sizeof(ic[0]); 60 int jc[sc] = {-1}; 61 r = std::unique_copy(InIter(ic), InIter(ic+sc), OutIter(jc)); 62 assert(base(r) == jc + 1); 63 assert(jc[0] == 0); 64 65 const int id[] = {0, 0, 1}; 66 const unsigned sd = sizeof(id)/sizeof(id[0]); 67 int jd[sd] = {-1}; 68 r = std::unique_copy(InIter(id), InIter(id+sd), OutIter(jd)); 69 assert(base(r) == jd + 2); 70 assert(jd[0] == 0); 71 assert(jd[1] == 1); 72 73 const int ie[] = {0, 0, 1, 0}; 74 const unsigned se = sizeof(ie)/sizeof(ie[0]); 75 int je[se] = {-1}; 76 r = std::unique_copy(InIter(ie), InIter(ie+se), OutIter(je)); 77 assert(base(r) == je + 3); 78 assert(je[0] == 0); 79 assert(je[1] == 1); 80 assert(je[2] == 0); 81 82 const int ig[] = {0, 0, 1, 1}; 83 const unsigned sg = sizeof(ig)/sizeof(ig[0]); 84 int jg[sg] = {-1}; 85 r = std::unique_copy(InIter(ig), InIter(ig+sg), OutIter(jg)); 86 assert(base(r) == jg + 2); 87 assert(jg[0] == 0); 88 assert(jg[1] == 1); 89 90 const int ih[] = {0, 1, 1}; 91 const unsigned sh = sizeof(ih)/sizeof(ih[0]); 92 int jh[sh] = {-1}; 93 r = std::unique_copy(InIter(ih), InIter(ih+sh), OutIter(jh)); 94 assert(base(r) == jh + 2); 95 assert(jh[0] == 0); 96 assert(jh[1] == 1); 97 98 const int ii[] = {0, 1, 1, 1, 2, 2, 2}; 99 const unsigned si = sizeof(ii)/sizeof(ii[0]); 100 int ji[si] = {-1}; 101 r = std::unique_copy(InIter(ii), InIter(ii+si), OutIter(ji)); 102 assert(base(r) == ji + 3); 103 assert(ji[0] == 0); 104 assert(ji[1] == 1); 105 assert(ji[2] == 2); 106 } 107 108 int main(int, char**) 109 { 110 test<input_iterator<const int*>, output_iterator<int*> >(); 111 test<input_iterator<const int*>, forward_iterator<int*> >(); 112 test<input_iterator<const int*>, bidirectional_iterator<int*> >(); 113 test<input_iterator<const int*>, random_access_iterator<int*> >(); 114 test<input_iterator<const int*>, int*>(); 115 116 test<forward_iterator<const int*>, output_iterator<int*> >(); 117 test<forward_iterator<const int*>, forward_iterator<int*> >(); 118 test<forward_iterator<const int*>, bidirectional_iterator<int*> >(); 119 test<forward_iterator<const int*>, random_access_iterator<int*> >(); 120 test<forward_iterator<const int*>, int*>(); 121 122 test<bidirectional_iterator<const int*>, output_iterator<int*> >(); 123 test<bidirectional_iterator<const int*>, forward_iterator<int*> >(); 124 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >(); 125 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >(); 126 test<bidirectional_iterator<const int*>, int*>(); 127 128 test<random_access_iterator<const int*>, output_iterator<int*> >(); 129 test<random_access_iterator<const int*>, forward_iterator<int*> >(); 130 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >(); 131 test<random_access_iterator<const int*>, random_access_iterator<int*> >(); 132 test<random_access_iterator<const int*>, int*>(); 133 134 test<const int*, output_iterator<int*> >(); 135 test<const int*, forward_iterator<int*> >(); 136 test<const int*, bidirectional_iterator<int*> >(); 137 test<const int*, random_access_iterator<int*> >(); 138 test<const int*, int*>(); 139 140 #if TEST_STD_VER > 17 141 static_assert(test_constexpr()); 142 #endif 143 144 return 0; 145 } 146