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99dee823 | 1 | // Copyright (C) 2020-2021 Free Software Foundation, Inc. |
bc464641 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 | ||
18 | // { dg-options "-std=gnu++2a" } | |
19 | // { dg-do run { target c++2a } } | |
20 | ||
21 | #include <algorithm> | |
22 | #include <testsuite_hooks.h> | |
23 | #include <testsuite_iterators.h> | |
24 | ||
25 | using __gnu_test::test_container; | |
26 | using __gnu_test::test_range; | |
27 | using __gnu_test::input_iterator_wrapper; | |
28 | using __gnu_test::forward_iterator_wrapper; | |
29 | ||
30 | namespace ranges = std::ranges; | |
31 | ||
32 | struct X { int i; }; | |
33 | ||
34 | void | |
35 | test01() | |
36 | { | |
37 | X x[] = { {2}, {2}, {6}, {8}, {10}, {11}, {2} }; | |
38 | auto res = ranges::count_if(x, x+7, [] (int i) { return i % 2 == 0; }, &X::i); | |
39 | VERIFY( res == 6 ); | |
40 | res = ranges::count_if(x, x+7, [] (int i) { return i % 2 == 1; }, &X::i); | |
41 | VERIFY( res == 1 ); | |
42 | res = ranges::count_if(x, x+7, [] (int i) { return i < 0; }, &X::i); | |
43 | VERIFY( res == 0 ); | |
44 | ||
45 | test_container<X, forward_iterator_wrapper> c(x); | |
46 | res = ranges::count_if(c, [] (int i) { return i == 2; }, &X::i); | |
47 | VERIFY( res == 3 ); | |
48 | res = ranges::count_if(c, [] (int i) { return i < 0; }, &X::i); | |
49 | VERIFY( res == 0 ); | |
50 | ||
51 | test_range<X, input_iterator_wrapper> r(x); | |
52 | res = ranges::count_if(c, [] (int i) { return i == 2; }, &X::i); | |
53 | VERIFY( res == 3 ); | |
54 | res = ranges::count_if(c, [] (int i) { return i < 0; }, &X::i); | |
55 | VERIFY( res == 0 ); | |
56 | } | |
57 | ||
58 | struct Y { int i; int j; }; | |
59 | ||
60 | void | |
61 | test02() | |
62 | { | |
63 | static constexpr Y y[] = { {1,2}, {2,4}, {3,6}, {1,6} }; | |
64 | static_assert(ranges::count_if(y, [] (int i) { return i < 5; }, &Y::j) == 2); | |
65 | static_assert(ranges::count_if(y, [] (int i) { return i != 4; }, &Y::j) == 3); | |
66 | } | |
67 | ||
68 | int | |
69 | main() | |
70 | { | |
71 | test01(); | |
72 | test02(); | |
73 | } |