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// Copyright (C) 2020-2022 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 <vector>
#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;
namespace ranges = std::ranges;
void
test01()
{
int x[] = {1,2,3,4,5};
for (int i = 0; i <= 5; i++)
for (int j = 0; j <= 5; j++)
{
int z[10];
test_range<int, input_iterator_wrapper> rx(x, x+i), ry(x, x+j);
test_range<int, output_iterator_wrapper> rz(z, z+i+j);
auto [in1,in2,out] = ranges::merge(rx, ry, rz.begin());
VERIFY( in1 == rx.end() );
VERIFY( in2 == ry.end() );
VERIFY( out == rz.end() );
std::vector<int> v(x, x+i);
v.insert(v.end(), x, x+j);
ranges::sort(v);
VERIFY( ranges::equal(v.begin(), v.end(), z, z+i+j) );
}
}
constexpr bool
test02()
{
int x[] = {-1,-3,-5};
int y[] = {2,4,6};
int z[6];
ranges::merge(x, x+3, y, y+3, z,
ranges::greater{}, {}, [] (int a) { return -a; });
const int w[6] = {-1, 2, -3, 4, -5, 6};
return ranges::equal(w, z);
}
int
main()
{
test01();
static_assert(test02());
}
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