1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <algorithm>
// template<ForwardIterator InIter, OutputIterator<auto, InIter::reference> OutIter>
// constexpr OutIter // constexpr after C++17
// rotate_copy(InIter first, InIter middle, InIter last, OutIter result);
#include <algorithm>
#include <cassert>
#include "test_macros.h"
#include "test_iterators.h"
// #if TEST_STD_VER > 17
// TEST_CONSTEXPR bool test_constexpr() {
// int ia[] = {1, 3, 5, 2, 5, 6};
// int ib[std::size(ia)] = {0};
//
// const size_t N = 2;
// const auto middle = std::begin(ia) + N;
// auto it = std::rotate_copy(std::begin(ia), middle, std::end(ia), std::begin(ib));
//
// return std::distance(std::begin(ib), it) == std::size(ia)
// && std::equal (std::begin(ia), middle, std::begin(ib) + std::size(ia) - N)
// && std::equal (middle, std::end(ia), std::begin(ib))
// ;
// }
// #endif
template <class InIter, class OutIter>
void
test()
{
int ia[] = {0, 1, 2, 3};
const unsigned sa = sizeof(ia)/sizeof(ia[0]);
int ib[sa] = {0};
OutIter r = std::rotate_copy(InIter(ia), InIter(ia), InIter(ia), OutIter(ib));
assert(base(r) == ib);
r = std::rotate_copy(InIter(ia), InIter(ia), InIter(ia+1), OutIter(ib));
assert(base(r) == ib+1);
assert(ib[0] == 0);
r = std::rotate_copy(InIter(ia), InIter(ia+1), InIter(ia+1), OutIter(ib));
assert(base(r) == ib+1);
assert(ib[0] == 0);
r = std::rotate_copy(InIter(ia), InIter(ia), InIter(ia+2), OutIter(ib));
assert(base(r) == ib+2);
assert(ib[0] == 0);
assert(ib[1] == 1);
r = std::rotate_copy(InIter(ia), InIter(ia+1), InIter(ia+2), OutIter(ib));
assert(base(r) == ib+2);
assert(ib[0] == 1);
assert(ib[1] == 0);
r = std::rotate_copy(InIter(ia), InIter(ia+2), InIter(ia+2), OutIter(ib));
assert(base(r) == ib+2);
assert(ib[0] == 0);
assert(ib[1] == 1);
r = std::rotate_copy(InIter(ia), InIter(ia), InIter(ia+3), OutIter(ib));
assert(base(r) == ib+3);
assert(ib[0] == 0);
assert(ib[1] == 1);
assert(ib[2] == 2);
r = std::rotate_copy(InIter(ia), InIter(ia+1), InIter(ia+3), OutIter(ib));
assert(base(r) == ib+3);
assert(ib[0] == 1);
assert(ib[1] == 2);
assert(ib[2] == 0);
r = std::rotate_copy(InIter(ia), InIter(ia+2), InIter(ia+3), OutIter(ib));
assert(base(r) == ib+3);
assert(ib[0] == 2);
assert(ib[1] == 0);
assert(ib[2] == 1);
r = std::rotate_copy(InIter(ia), InIter(ia+3), InIter(ia+3), OutIter(ib));
assert(base(r) == ib+3);
assert(ib[0] == 0);
assert(ib[1] == 1);
assert(ib[2] == 2);
r = std::rotate_copy(InIter(ia), InIter(ia), InIter(ia+4), OutIter(ib));
assert(base(r) == ib+4);
assert(ib[0] == 0);
assert(ib[1] == 1);
assert(ib[2] == 2);
assert(ib[3] == 3);
r = std::rotate_copy(InIter(ia), InIter(ia+1), InIter(ia+4), OutIter(ib));
assert(base(r) == ib+4);
assert(ib[0] == 1);
assert(ib[1] == 2);
assert(ib[2] == 3);
assert(ib[3] == 0);
r = std::rotate_copy(InIter(ia), InIter(ia+2), InIter(ia+4), OutIter(ib));
assert(base(r) == ib+4);
assert(ib[0] == 2);
assert(ib[1] == 3);
assert(ib[2] == 0);
assert(ib[3] == 1);
r = std::rotate_copy(InIter(ia), InIter(ia+3), InIter(ia+4), OutIter(ib));
assert(base(r) == ib+4);
assert(ib[0] == 3);
assert(ib[1] == 0);
assert(ib[2] == 1);
assert(ib[3] == 2);
r = std::rotate_copy(InIter(ia), InIter(ia+4), InIter(ia+4), OutIter(ib));
assert(base(r) == ib+4);
assert(ib[0] == 0);
assert(ib[1] == 1);
assert(ib[2] == 2);
assert(ib[3] == 3);
}
int main()
{
test<bidirectional_iterator<const int*>, output_iterator<int*> >();
test<bidirectional_iterator<const int*>, forward_iterator<int*> >();
test<bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
test<bidirectional_iterator<const int*>, random_access_iterator<int*> >();
test<bidirectional_iterator<const int*>, int*>();
test<random_access_iterator<const int*>, output_iterator<int*> >();
test<random_access_iterator<const int*>, forward_iterator<int*> >();
test<random_access_iterator<const int*>, bidirectional_iterator<int*> >();
test<random_access_iterator<const int*>, random_access_iterator<int*> >();
test<random_access_iterator<const int*>, int*>();
test<const int*, output_iterator<int*> >();
test<const int*, forward_iterator<int*> >();
test<const int*, bidirectional_iterator<int*> >();
test<const int*, random_access_iterator<int*> >();
test<const int*, int*>();
// #if TEST_STD_VER > 17
// static_assert(test_constexpr());
// #endif
}
|