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<BidirectionalIterator Iter> |
12 | // requires HasSwap<Iter::reference, Iter::reference> |
13 | // constexpr void // constexpr in C++20 |
14 | // reverse(Iter first, Iter last); |
15 | |
16 | #include <algorithm> |
17 | #include <cassert> |
18 | |
19 | #include "test_macros.h" |
20 | #include "test_iterators.h" |
21 | |
22 | template <class Iter> |
23 | TEST_CONSTEXPR_CXX20 bool |
24 | test() |
25 | { |
26 | int ia[] = {0}; |
27 | const unsigned sa = sizeof(ia)/sizeof(ia[0]); |
28 | std::reverse(Iter(ia), Iter(ia)); |
29 | assert(ia[0] == 0); |
30 | std::reverse(Iter(ia), Iter(ia+sa)); |
31 | assert(ia[0] == 0); |
32 | |
33 | int ib[] = {0, 1}; |
34 | const unsigned sb = sizeof(ib)/sizeof(ib[0]); |
35 | std::reverse(Iter(ib), Iter(ib+sb)); |
36 | assert(ib[0] == 1); |
37 | assert(ib[1] == 0); |
38 | |
39 | int ic[] = {0, 1, 2}; |
40 | const unsigned sc = sizeof(ic)/sizeof(ic[0]); |
41 | std::reverse(Iter(ic), Iter(ic+sc)); |
42 | assert(ic[0] == 2); |
43 | assert(ic[1] == 1); |
44 | assert(ic[2] == 0); |
45 | |
46 | int id[] = {0, 1, 2, 3}; |
47 | const unsigned sd = sizeof(id)/sizeof(id[0]); |
48 | std::reverse(Iter(id), Iter(id+sd)); |
49 | assert(id[0] == 3); |
50 | assert(id[1] == 2); |
51 | assert(id[2] == 1); |
52 | assert(id[3] == 0); |
53 | |
54 | return true; |
55 | } |
56 | |
57 | int main(int, char**) |
58 | { |
59 | test<bidirectional_iterator<int*> >(); |
60 | test<random_access_iterator<int*> >(); |
61 | test<int*>(); |
62 | |
63 | #if TEST_STD_VER >= 20 |
64 | static_assert(test<bidirectional_iterator<int*>>()); |
65 | static_assert(test<random_access_iterator<int*>>()); |
66 | static_assert(test<int*>()); |
67 | #endif |
68 | |
69 | return 0; |
70 | } |
71 | |