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// 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 <testsuite_hooks.h>
#include <testsuite_iterators.h>
using __gnu_test::test_container;
using __gnu_test::test_range;
using __gnu_test::forward_iterator_wrapper;
using __gnu_test::random_access_iterator_wrapper;
namespace ranges = std::ranges;
struct X
{
int i;
X () : i(0) { }
X (int a) : i(a) { }
friend bool
operator==(const X& lhs, const X& rhs)
{
return lhs.i == rhs.i;
}
};
static_assert(!std::is_trivial_v<X>);
template<template<typename, template<typename> typename> typename container,
template<typename> typename wrapper,
typename T = int>
void
test01()
{
for (int a = 0; a <= 7; a++)
{
T x[] = {1, 2, 3, 4, 5, 6, 7};
T w[7];
container<T, wrapper> rx(x), rw(w);
auto i = ranges::begin(rx);
std::advance(i, a);
auto [in,out] = ranges::rotate_copy(rx, i, ranges::begin(rw));
VERIFY( in == ranges::end(rx) );
VERIFY( out == ranges::end(rw) );
for (int k = 0; k < 7; k++)
VERIFY( w[k] == (k+a)%7 + 1 );
}
}
constexpr bool
test02()
{
const int x[] = {1, 2, 3, 4};
int w[3];
const int y[] = { 2, 3, 1};
auto [in,out] = ranges::rotate_copy(x, x+1, x+3, w);
return (in == x+3
&& out == w+3
&& ranges::equal(w, y));
}
int
main()
{
test01<test_container, forward_iterator_wrapper>();
test01<test_range, forward_iterator_wrapper>();
test01<test_container, random_access_iterator_wrapper>();
test01<test_range, random_access_iterator_wrapper>();
test01<test_container, random_access_iterator_wrapper, X>();
test01<test_range, random_access_iterator_wrapper, X>();
static_assert(test02());
}
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