| // 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 <iterator> |
| #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; |
| using __gnu_test::bidirectional_iterator_wrapper; |
| |
| namespace ranges = std::ranges; |
| |
| struct X { int i; }; |
| |
| void |
| test01() |
| { |
| int x[] = { {2}, {2}, {6}, {8}, {10}, {11} }; |
| int y[] = { {2}, {6}, {8}, {10}, {11}, {2} }; |
| int z[] = { {2}, {6}, {8}, {10}, {2}, {2} }; |
| |
| VERIFY( ranges::is_permutation(x, x+6, y, y+6) ); |
| VERIFY( !ranges::is_permutation(x, x+6, y, y+5) ); |
| |
| test_container<int, forward_iterator_wrapper> cx(x), cy(y), cz(z); |
| test_range<int, forward_iterator_wrapper> rx(x), ry(y), rz(z); |
| VERIFY( ranges::is_permutation(cx, ry) ); |
| VERIFY( !ranges::is_permutation(rx, cz) ); |
| VERIFY( ranges::is_permutation(rx, cy) ); |
| VERIFY( !ranges::is_permutation(cx, rz) ); |
| } |
| |
| void |
| test02() |
| { |
| static constexpr X x[] = { {2}, {2}, {6}, {8}, {10}, {11} }; |
| static constexpr X y[] = { {2}, {6}, {8}, {10}, {11}, {2} }; |
| static constexpr int z[] = { {2}, {6}, {8}, {10}, {2}, {2} }; |
| static_assert(ranges::is_permutation(x, y, {}, &X::i, &X::i)); |
| static_assert(!ranges::is_permutation(x, z, {}, &X::i)); |
| static_assert(!ranges::is_permutation(z, y, {}, {}, &X::i)); |
| } |
| |
| void |
| test03() |
| { |
| int x[] = { 1, 2, 3, 4 }; |
| int y[] = { 1, 2, 3, 3 }; |
| test_container<int, bidirectional_iterator_wrapper> cx(x); |
| do |
| do |
| { |
| VERIFY( ranges::is_permutation(cx, x) ); |
| VERIFY( !ranges::is_permutation(y, cx) ); |
| } while (std::next_permutation(y, y+4)); |
| while (std::next_permutation(std::begin(cx), std::end(cx))); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| } |