| // Copyright (C) 2020-2024 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-do run { target c++20 } } |
| // { dg-require-cstdint "" } |
| |
| #include <algorithm> |
| #include <random> |
| #include <vector> |
| #include <testsuite_hooks.h> |
| #include <testsuite_iterators.h> |
| |
| using __gnu_test::test_container; |
| using __gnu_test::test_range; |
| using __gnu_test::random_access_iterator_wrapper; |
| |
| namespace ranges = std::ranges; |
| |
| // This test is adapted from 25_algorithms/shuffle/1.cc. |
| |
| void |
| test01() |
| { |
| for (unsigned size = 0; size < 50; ++size) |
| { |
| std::vector<int> vref(size); |
| std::iota(vref.begin(), vref.end(), 0); |
| std::vector<int> v1(vref), v2(vref); |
| test_container<int, random_access_iterator_wrapper> c |
| = {v1.data(), v1.data() + size}; |
| test_range<int, random_access_iterator_wrapper> r |
| = {v2.data(), v2.data() + size}; |
| |
| std::ranlux48_base g1(size), g2(size + 1); |
| VERIFY( ranges::shuffle(c, g1) == c.end() ); |
| VERIFY( ranges::shuffle(ranges::begin(r), ranges::end(r), g2) |
| == ranges::end(r) ); |
| |
| if (size >= 10) |
| { |
| VERIFY( !ranges::equal(c, vref) ); |
| VERIFY( !ranges::equal(r, vref) ); |
| VERIFY( !ranges::equal(c, r) ); |
| } |
| |
| VERIFY( ranges::is_permutation(c, vref) ); |
| VERIFY( ranges::is_permutation(r, vref) ); |
| } |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| } |