| // 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 <functional> |
| #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::output_iterator_wrapper; |
| using __gnu_test::forward_iterator_wrapper; |
| |
| namespace ranges = std::ranges; |
| |
| void |
| test01() |
| { |
| int x[] = {4,2,1,1,0}; |
| int y[] = {3,2,1}; |
| int z[6]; |
| test_range<int, input_iterator_wrapper> rx(x), ry(y); |
| test_range<int, output_iterator_wrapper> rz(z); |
| auto [in1,in2,out] |
| = ranges::set_union(rx, ry, rz.begin(), |
| ranges::greater{}); |
| VERIFY( in1.ptr == x+5 ); |
| VERIFY( in2.ptr == y+3 ); |
| VERIFY( out.ptr == z+6 ); |
| VERIFY( ranges::equal(z, (int[]){4,3,2,1,1,0}) ); |
| } |
| |
| void |
| test02() |
| { |
| int x[] = {4,2,1,1,0}; |
| int y[] = {3,2,1,1,0}; |
| int z[6]; |
| test_container<int, forward_iterator_wrapper> rx(x), ry(y); |
| test_container<int, forward_iterator_wrapper> rz(z); |
| auto [in1,in2,out] |
| = ranges::set_union(rx.begin(), rx.end(), |
| ry.begin(), ry.end(), |
| rz.begin(), |
| {}, |
| std::negate<>{}, |
| std::negate<>{}); |
| VERIFY( in1.ptr == x+5 ); |
| VERIFY( in2.ptr == y+5 ); |
| VERIFY( out.ptr == z+6 ); |
| VERIFY( ranges::equal(z, (int[]){4,3,2,1,1,0}) ); |
| } |
| |
| constexpr bool |
| test03() |
| { |
| bool ok = true; |
| int x[1] = {0}; |
| int y[1] = {1}; |
| int z[1]; |
| ranges::set_union(x, x, y, y+1, z); |
| ok &= z[0] == 1; |
| ranges::set_union(x, x+1, y, y, z); |
| ok &= z[0] == 0; |
| return ok; |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| static_assert(test03()); |
| } |