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// Copyright (C) 2020-2024 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-do run { target c++20 } }
#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, 17, 17, 17 };
{
X x[6];
VERIFY( ranges::fill(x, X{17}) == x+6 );
VERIFY( ranges::equal(x, c, {}, &X::i) );
}
{
char x[6];
VERIFY( ranges::fill(x, 17) == x+6 );
VERIFY( ranges::equal(x, c) );
}
{
X x[6];
test_container<X, forward_iterator_wrapper> cx(x);
VERIFY( ranges::fill(cx, X{17}) == cx.end() );
VERIFY( ranges::equal(cx, c, {}, &X::i) );
}
{
int x[6];
test_range<int, output_iterator_wrapper> rx(x);
VERIFY( ranges::fill(rx, 17) == rx.end() );
VERIFY( ranges::equal(x, c) );
}
{
std::list<int> list(6);
ranges::fill(list, 17);
VERIFY( ranges::equal(list, c) );
}
}
constexpr bool
test02()
{
bool ok = true;
int x[5];
ranges::fill(x, 17);
for (auto v : x)
ok &= v == 17;
return ok;
}
void
test03()
{
// Bug libstdc++/117094 - ranges::fill misses std::move for output_iterator
// Move-only output iterator
struct Iterator
{
using difference_type = long;
Iterator(int* p) : p(p) { }
Iterator(Iterator&&) = default;
Iterator& operator=(Iterator&&) = default;
int& operator*() const { return *p; }
Iterator& operator++() { ++p; return *this; }
Iterator operator++(int) { return Iterator(p++ ); }
int* p;
struct Sentinel
{
const int* p;
bool operator==(const Iterator& i) const { return p == i.p; }
long operator-(const Iterator& i) const { return p - i.p; }
};
long operator-(Sentinel s) const { return p - s.p; }
};
static_assert(std::sized_sentinel_for<Iterator::Sentinel, Iterator>);
int a[2];
std::ranges::fill(Iterator(a), Iterator::Sentinel{a+2}, 999);
VERIFY( a[0] == 999 );
VERIFY( a[1] == 999 );
}
int
main()
{
test01();
static_assert(test02());
test03();
}
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