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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-do run { target c++11 } }
#include <algorithm>
#include <testsuite_iterators.h>
void
test01()
{
// Negative sizes should be a no-op
const int from[2] = { 1, 2 };
__gnu_test::input_container<const int> f(from);
int* to = nullptr;
std::copy_n(f.begin(), -1, to);
std::copy_n(from, -20000, to); // random access
__gnu_test::random_access_container<const int> f2(from);
std::copy_n(f2.end(), -1, to);
std::copy_n(f2.begin(), -1, to);
}
struct Size
{
operator long() const { return 2L; }
void operator++() = delete;
void operator--() = delete;
void operator++(int) = delete;
void operator--(int) = delete;
template<typename T> friend void operator+(Size, T) = delete;
template<typename T> friend void operator+(T, Size) = delete;
template<typename T> friend void operator-(Size, T) = delete;
template<typename T> friend void operator-(T, Size) = delete;
template<typename T> friend void operator==(Size, T) = delete;
template<typename T> friend void operator==(T, Size) = delete;
template<typename T> friend void operator!=(Size, T) = delete;
template<typename T> friend void operator!=(T, Size) = delete;
template<typename T> friend void operator<(Size, T) = delete;
template<typename T> friend void operator<(T, Size) = delete;
template<typename T> friend void operator<=(Size, T) = delete;
template<typename T> friend void operator<=(T, Size) = delete;
template<typename T> friend void operator>(Size, T) = delete;
template<typename T> friend void operator>(T, Size) = delete;
template<typename T> friend void operator>=(Size, T) = delete;
template<typename T> friend void operator>=(T, Size) = delete;
};
void
test02()
{
// C++20 only requires that Size is convertible to an integral type,
// it doesn't need to support any arithmetic or relational expressions.
const int from[3] = { 1, 2, 3 };
__gnu_test::input_container<const int> f(from);
int to[3] = { };
__gnu_test::output_container<int> t(to);
Size s;
std::copy_n(f.begin(), s, t.begin());
VERIFY( to[0] == 1 );
VERIFY( to[1] == 2 );
VERIFY( to[2] == 0 );
const int from2[3] = { 11, 22, 33 };
__gnu_test::random_access_container<const int> f2(from2);
__gnu_test::output_container<int> t2(to);
std::copy_n(f2.begin(), s, t2.begin());
VERIFY( to[0] == 11 );
VERIFY( to[1] == 22 );
VERIFY( to[2] == 0 );
}
int
main()
{
test01();
test02();
}
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