| // Copyright (C) 2020-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-options "-std=gnu++2a" } |
| // { dg-do run { target c++2a } } |
| |
| #include <algorithm> |
| #include <testsuite_hooks.h> |
| #include <testsuite_iterators.h> |
| |
| using __gnu_test::test_container; |
| using __gnu_test::test_range; |
| using __gnu_test::input_iterator_wrapper; |
| using __gnu_test::forward_iterator_wrapper; |
| |
| namespace ranges = std::ranges; |
| |
| struct X { int i; }; |
| |
| void |
| test01() |
| { |
| X x[] = { {2}, {2}, {6}, {8}, {10}, {11}, {2} }; |
| auto res = ranges::count_if(x, x+7, [] (int i) { return i % 2 == 0; }, &X::i); |
| VERIFY( res == 6 ); |
| res = ranges::count_if(x, x+7, [] (int i) { return i % 2 == 1; }, &X::i); |
| VERIFY( res == 1 ); |
| res = ranges::count_if(x, x+7, [] (int i) { return i < 0; }, &X::i); |
| VERIFY( res == 0 ); |
| |
| test_container<X, forward_iterator_wrapper> c(x); |
| res = ranges::count_if(c, [] (int i) { return i == 2; }, &X::i); |
| VERIFY( res == 3 ); |
| res = ranges::count_if(c, [] (int i) { return i < 0; }, &X::i); |
| VERIFY( res == 0 ); |
| |
| test_range<X, input_iterator_wrapper> r(x); |
| res = ranges::count_if(c, [] (int i) { return i == 2; }, &X::i); |
| VERIFY( res == 3 ); |
| res = ranges::count_if(c, [] (int i) { return i < 0; }, &X::i); |
| VERIFY( res == 0 ); |
| } |
| |
| struct Y { int i; int j; }; |
| |
| void |
| test02() |
| { |
| static constexpr Y y[] = { {1,2}, {2,4}, {3,6}, {1,6} }; |
| static_assert(ranges::count_if(y, [] (int i) { return i < 5; }, &Y::j) == 2); |
| static_assert(ranges::count_if(y, [] (int i) { return i != 4; }, &Y::j) == 3); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| } |