| // Copyright (C) 2019-2021 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> |
| |
| // Lambda that calls lexicographical_compare_three_way on two ranges. |
| // Arguments are passed by value intentionally, so that a copy of the range |
| // is traversed and the original is not modified. Otherwise when the range |
| // has input iterators the range will be consumed after the first comparison. |
| auto lexicomp3 = [](auto r1, auto r2) { |
| return std::lexicographical_compare_three_way(r1.begin(), r1.end(), |
| r2.begin(), r2.end()); |
| }; |
| |
| void |
| test01() |
| { |
| using __gnu_test::test_container; |
| using __gnu_test::input_iterator_wrapper; |
| using __gnu_test::forward_iterator_wrapper; |
| int arr1[] = { 0, 1, 2, 3, 4, 5, 6, 7 }; |
| int arr2[] = { 0, 1, 2, 3, 4, 5, 6, 777 }; |
| |
| { |
| test_container<int, input_iterator_wrapper> c1(arr1); |
| test_container<int, input_iterator_wrapper> c2(arr2); |
| VERIFY( lexicomp3(c1, c1) == 0 ); |
| VERIFY( lexicomp3(c1, c2) < 0 ); |
| VERIFY( lexicomp3(c2, c1) > 0 ); |
| } |
| |
| { |
| test_container<int, input_iterator_wrapper> c1(arr1, arr1+6); |
| test_container<int, input_iterator_wrapper> c2(arr2, arr2+6); |
| VERIFY( lexicomp3(c1, c1) == 0 ); |
| VERIFY( lexicomp3(c1, c2) == 0 ); |
| VERIFY( lexicomp3(c2, c1) == 0 ); |
| } |
| |
| { |
| test_container<int, input_iterator_wrapper> c1(arr1); |
| test_container<int, input_iterator_wrapper> c2(arr2, arr2+7); |
| VERIFY( lexicomp3(c1, c1) == 0 ); |
| VERIFY( lexicomp3(c1, c2) > 0 ); |
| VERIFY( lexicomp3(c2, c1) < 0 ); |
| } |
| |
| { |
| test_container<int, input_iterator_wrapper> c1(arr1); |
| test_container<int, forward_iterator_wrapper> c2(arr2); |
| VERIFY( lexicomp3(c1, c1) == 0 ); |
| VERIFY( lexicomp3(c1, c2) < 0 ); |
| VERIFY( lexicomp3(c2, c1) > 0 ); |
| } |
| |
| { |
| test_container<int, input_iterator_wrapper> c1(arr1); |
| test_container<int, forward_iterator_wrapper> c2(arr2, arr2+7); |
| VERIFY( lexicomp3(c1, c1) == 0 ); |
| VERIFY( lexicomp3(c2, c2) == 0 ); |
| VERIFY( lexicomp3(c1, c2) > 0 ); |
| VERIFY( lexicomp3(c2, c1) < 0 ); |
| } |
| |
| { |
| test_container<int, forward_iterator_wrapper> c1(arr1, arr1+7); |
| test_container<int, input_iterator_wrapper> c2(arr2); |
| VERIFY( lexicomp3(c1, c1) == 0 ); |
| VERIFY( lexicomp3(c2, c2) == 0 ); |
| VERIFY( lexicomp3(c1, c2) < 0 ); |
| VERIFY( lexicomp3(c2, c1) > 0 ); |
| } |
| } |
| |
| void |
| test02() |
| { |
| using __gnu_test::test_container; |
| using __gnu_test::input_iterator_wrapper; |
| using __gnu_test::forward_iterator_wrapper; |
| std::array<unsigned char, 8> c1 = { 0, 1, 2, 3, 4, 5, 6, 7 }; |
| std::array<unsigned char, 8> c2 = { 0, 1, 2, 3, 4, 5, 6, 77 }; |
| |
| VERIFY( lexicomp3(c1, c1) == 0 ); |
| VERIFY( lexicomp3(c1, c2) < 0 ); |
| VERIFY( lexicomp3(c2, c1) > 0 ); |
| |
| std::array<unsigned char, 7> c3 = { 0, 1, 2, 3, 4, 5, 6 }; |
| VERIFY( lexicomp3(c3, c3) == 0 ); |
| VERIFY( lexicomp3(c1, c3) > 0 ); |
| VERIFY( lexicomp3(c3, c1) < 0 ); |
| } |
| |
| void |
| test03() |
| { |
| unsigned char a[2] = { 1, 2 }; |
| unsigned char* p = nullptr; |
| // ensure memcmp not called with nullptr |
| VERIFY( std::lexicographical_compare_three_way(p, p, a, a+2) < 0 ); |
| VERIFY( std::lexicographical_compare_three_way(a, a+2, p, p) > 0 ); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| } |