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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 <testsuite_hooks.h>
#include <testsuite_iterators.h>
#include <list>
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;
struct X
{
int i;
};
void
test01()
{
const int c[6] = { 17, 17, 17, 4, 5, 6 };
{
X x[6] = { {1}, {2}, {3}, {4}, {5}, {6} };
VERIFY( ranges::fill_n(x, 3, X{17}) == x+3 );
VERIFY( ranges::equal(x, c, {}, &X::i) );
}
{
char x[6];
VERIFY( ranges::fill_n(x, 3, 17) == x+3 );
VERIFY( ranges::equal(x, x+3, c, c+3) );
}
{
X x[6] = { 1, 2, 3, 4, 5, 6 };
test_container<X, forward_iterator_wrapper> cx(x);
VERIFY( ranges::fill_n(cx.begin(), 3, X{17})->i == 4 );
VERIFY( ranges::equal(cx, c, {}, &X::i) );
}
{
int x[6] = { 1, 2, 3, 4, 5, 6 };;
test_range<int, output_iterator_wrapper> rx(x);
ranges::fill_n(ranges::begin(rx), 3, 17);
VERIFY( ranges::equal(x, c) );
}
{
std::list<int> list({1, 2, 3, 4, 5, 6});
ranges::fill_n(list.begin(), 3, 17);
VERIFY( ranges::equal(list, c) );
}
}
template<typename T>
constexpr bool
test02()
{
bool ok = true;
T x[6] = { 1, 2, 3, 4, 5, 6 };
const int y[6] = { 1, 2, 3, 4, 5, 6 };
const int z[6] = { 17, 17, 17, 4, 5, 6 };
ranges::fill_n(x, 0, 17);
ranges::fill_n(x, -1, 17);
ok &= ranges::equal(x, y);
ranges::fill_n(x, 3, 17);
ok &= ranges::equal(x, z);
return ok;
}
int
main()
{
test01();
static_assert(test02<int>());
static_assert(test02<unsigned char>()); // PR libstdc++/101608
}