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7adcbafe | 1 | // Copyright (C) 2016-2022 Free Software Foundation, Inc. |
b405d54f JW |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
18 | // { dg-do compile { target c++11 } } | |
19 | ||
20 | #include <iterator> | |
21 | #include <testsuite_iterators.h> | |
22 | ||
23 | // PR libstdc++/71771 | |
24 | ||
25 | template<typename Iter> | |
26 | auto | |
27 | diff2(std::reverse_iterator<Iter> it1, std::reverse_iterator<Iter> it2) | |
28 | -> decltype(it1 - it2) | |
29 | { return it1 - it2; } | |
30 | ||
31 | template<typename Iter> | |
32 | void | |
33 | diff2(Iter, Iter) | |
34 | { } | |
35 | ||
36 | void | |
37 | test01() | |
38 | { | |
39 | int i[2]; | |
40 | __gnu_test::test_container<int, __gnu_test::bidirectional_iterator_wrapper> | |
41 | c(i); | |
42 | using reverse_iterator | |
43 | = std::reverse_iterator<__gnu_test::bidirectional_iterator_wrapper<int>>; | |
44 | diff2(reverse_iterator(c.end()), reverse_iterator(c.begin())); | |
45 | } |