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// { dg-options "-std=gnu++17" }
// { dg-do compile }
// Copyright (C) 2016-2019 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/>.
#include <iterator>
namespace std
{
template<class C> constexpr auto begin(C& c) -> decltype(c.begin());
template<class C> constexpr auto begin(const C& c) -> decltype(c.begin());
template<class C> constexpr auto end(C& c) -> decltype(c.end());
template<class C> constexpr auto end(const C& c) -> decltype(c.end());
template<class T, size_t N> constexpr T* begin(T (&array)[N]);
template<class T, size_t N> constexpr T* end(T (&array)[N]);
template<class C> constexpr auto cbegin(const C& c) -> decltype(c.begin());
template<class C> constexpr auto cend(const C& c) -> decltype(c.end());
template<class C> constexpr auto rbegin(C& c) -> decltype(c.rbegin());
template<class C> constexpr auto rbegin(const C& c) -> decltype(c.rbegin());
template<class C> constexpr auto rend(C& c) -> decltype(c.rend());
template<class C> constexpr auto rend(const C& c) -> decltype(c.rend());
template<class T, size_t N>
constexpr reverse_iterator<T*> rbegin(T (&array)[N]);
template<class T, size_t N>
constexpr reverse_iterator<T*> rend(T (&array)[N]);
template<class E>
constexpr reverse_iterator<const E*> rbegin(initializer_list<E>);
template<class E>
constexpr reverse_iterator<const E*> rend(initializer_list<E>);
template<class C>
constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c));
template<class C>
constexpr auto cend(const C& c) -> decltype(std::rend(c));
}
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