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<InputIterator InIter, class OutIter>
13 // requires OutputIterator<OutIter, RvalueOf<InIter::value_type>::type>
14 // && EqualityComparable<InIter::value_type>
15 // && HasAssign<InIter::value_type, InIter::reference>
16 // && Constructible<InIter::value_type, InIter::reference>
17 // constexpr OutIter // constexpr after C++17
18 // unique_copy(InIter first, InIter last, OutIter result);
19
20 #include <algorithm>
21 #include <cassert>
22
23 #include "test_macros.h"
24 #include "test_iterators.h"
25
26 #if TEST_STD_VER > 17
test_constexpr()27 TEST_CONSTEXPR bool test_constexpr() {
28 int ia[] = {0, 1, 2, 2, 4};
29 int ib[] = {0, 0, 0, 0, 0};
30 const int expected[] = {0, 1, 2, 4};
31
32 auto it = std::unique_copy(std::begin(ia), std::end(ia), std::begin(ib));
33 return it == (std::begin(ib) + std::size(expected))
34 && *it == 0 // don't overwrite final value in output
35 && std::equal(std::begin(ib), it, std::begin(expected), std::end(expected))
36 ;
37 }
38 #endif
39
40 template <class InIter, class OutIter>
41 void
test()42 test()
43 {
44 const int ia[] = {0};
45 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
46 int ja[sa] = {-1};
47 OutIter r = std::unique_copy(InIter(ia), InIter(ia+sa), OutIter(ja));
48 assert(base(r) == ja + sa);
49 assert(ja[0] == 0);
50
51 const int ib[] = {0, 1};
52 const unsigned sb = sizeof(ib)/sizeof(ib[0]);
53 int jb[sb] = {-1};
54 r = std::unique_copy(InIter(ib), InIter(ib+sb), OutIter(jb));
55 assert(base(r) == jb + sb);
56 assert(jb[0] == 0);
57 assert(jb[1] == 1);
58
59 const int ic[] = {0, 0};
60 const unsigned sc = sizeof(ic)/sizeof(ic[0]);
61 int jc[sc] = {-1};
62 r = std::unique_copy(InIter(ic), InIter(ic+sc), OutIter(jc));
63 assert(base(r) == jc + 1);
64 assert(jc[0] == 0);
65
66 const int id[] = {0, 0, 1};
67 const unsigned sd = sizeof(id)/sizeof(id[0]);
68 int jd[sd] = {-1};
69 r = std::unique_copy(InIter(id), InIter(id+sd), OutIter(jd));
70 assert(base(r) == jd + 2);
71 assert(jd[0] == 0);
72 assert(jd[1] == 1);
73
74 const int ie[] = {0, 0, 1, 0};
75 const unsigned se = sizeof(ie)/sizeof(ie[0]);
76 int je[se] = {-1};
77 r = std::unique_copy(InIter(ie), InIter(ie+se), OutIter(je));
78 assert(base(r) == je + 3);
79 assert(je[0] == 0);
80 assert(je[1] == 1);
81 assert(je[2] == 0);
82
83 const int ig[] = {0, 0, 1, 1};
84 const unsigned sg = sizeof(ig)/sizeof(ig[0]);
85 int jg[sg] = {-1};
86 r = std::unique_copy(InIter(ig), InIter(ig+sg), OutIter(jg));
87 assert(base(r) == jg + 2);
88 assert(jg[0] == 0);
89 assert(jg[1] == 1);
90
91 const int ih[] = {0, 1, 1};
92 const unsigned sh = sizeof(ih)/sizeof(ih[0]);
93 int jh[sh] = {-1};
94 r = std::unique_copy(InIter(ih), InIter(ih+sh), OutIter(jh));
95 assert(base(r) == jh + 2);
96 assert(jh[0] == 0);
97 assert(jh[1] == 1);
98
99 const int ii[] = {0, 1, 1, 1, 2, 2, 2};
100 const unsigned si = sizeof(ii)/sizeof(ii[0]);
101 int ji[si] = {-1};
102 r = std::unique_copy(InIter(ii), InIter(ii+si), OutIter(ji));
103 assert(base(r) == ji + 3);
104 assert(ji[0] == 0);
105 assert(ji[1] == 1);
106 assert(ji[2] == 2);
107 }
108
main()109 int main()
110 {
111 test<input_iterator<const int*>, output_iterator<int*> >();
112 test<input_iterator<const int*>, forward_iterator<int*> >();
113 test<input_iterator<const int*>, bidirectional_iterator<int*> >();
114 test<input_iterator<const int*>, random_access_iterator<int*> >();
115 test<input_iterator<const int*>, int*>();
116
117 test<forward_iterator<const int*>, output_iterator<int*> >();
118 test<forward_iterator<const int*>, forward_iterator<int*> >();
119 test<forward_iterator<const int*>, bidirectional_iterator<int*> >();
120 test<forward_iterator<const int*>, random_access_iterator<int*> >();
121 test<forward_iterator<const int*>, int*>();
122
123 test<bidirectional_iterator<const int*>, output_iterator<int*> >();
124 test<bidirectional_iterator<const int*>, forward_iterator<int*> >();
125 test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
126 test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();
127 test<bidirectional_iterator<const int*>, int*>();
128
129 test<random_access_iterator<const int*>, output_iterator<int*> >();
130 test<random_access_iterator<const int*>, forward_iterator<int*> >();
131 test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();
132 test<random_access_iterator<const int*>, random_access_iterator<int*> >();
133 test<random_access_iterator<const int*>, int*>();
134
135 test<const int*, output_iterator<int*> >();
136 test<const int*, forward_iterator<int*> >();
137 test<const int*, bidirectional_iterator<int*> >();
138 test<const int*, random_access_iterator<int*> >();
139 test<const int*, int*>();
140
141 #if TEST_STD_VER > 17
142 static_assert(test_constexpr());
143 #endif
144 }
145