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a945c346 | 1 | // Copyright (C) 2020-2024 Free Software Foundation, Inc. |
cba9ef06 PP |
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 | ||
d4ac20b0 | 18 | // { dg-do run { target c++20 } } |
cba9ef06 PP |
19 | |
20 | #include <algorithm> | |
21 | #include <ranges> | |
22 | #include <testsuite_hooks.h> | |
23 | #include <testsuite_iterators.h> | |
24 | ||
25 | using __gnu_test::test_range; | |
26 | using __gnu_test::forward_iterator_wrapper; | |
27 | ||
28 | namespace ranges = std::ranges; | |
29 | namespace views = ranges::views; | |
30 | ||
31 | void | |
32 | test01() | |
33 | { | |
34 | int x[] = {1,2,1,3}; | |
35 | auto v = x | views::common; | |
36 | VERIFY( std::count(v.begin(), v.end(), 1) == 2); | |
37 | static_assert(ranges::common_range<decltype(v)>); | |
38 | static_assert(ranges::view<decltype(v)>); | |
39 | static_assert(ranges::random_access_range<decltype(v)>); | |
40 | static_assert(std::same_as<decltype(v), decltype(views::common(v))>); | |
41 | ||
42 | auto v2 = v | (views::common | views::common); | |
43 | VERIFY( std::count(v2.begin(), v2.end(), 1) == 2); | |
44 | } | |
45 | ||
46 | void | |
47 | test02() | |
48 | { | |
49 | int x[] = {1,2,1,3}; | |
50 | test_range<int, forward_iterator_wrapper> rx(x); | |
51 | auto v = ranges::common_view(rx); | |
52 | VERIFY( std::count(v.begin(), v.end(), 1) == 2); | |
53 | static_assert(ranges::common_range<decltype(v)>); | |
54 | static_assert(ranges::view<decltype(v)>); | |
55 | static_assert(ranges::forward_range<decltype(v)>); | |
56 | static_assert(std::same_as<decltype(v), decltype(views::common(v))>); | |
57 | ||
58 | auto v2 = v | (views::common | views::common); | |
59 | VERIFY( std::count(v2.begin(), v2.end(), 1) == 2); | |
60 | } | |
61 | ||
a25321ca PP |
62 | template<auto common = views::common> |
63 | void | |
64 | test03() | |
65 | { | |
66 | // Verify SFINAE behavior. | |
67 | static_assert(!requires { common(); }); | |
68 | static_assert(!requires { common(0, 0); }); | |
69 | static_assert(!requires { common(0); }); | |
70 | static_assert(!requires { 0 | common; }); | |
71 | } | |
72 | ||
cba9ef06 PP |
73 | int |
74 | main() | |
75 | { | |
76 | test01(); | |
77 | test02(); | |
a25321ca | 78 | test03(); |
cba9ef06 | 79 | } |