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// Copyright (C) 2019-2021 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 compile { target c++2a } }
#include <ranges>
static_assert(std::ranges::view<std::ranges::empty_view<int>>);
std::ranges::empty_view<int> e;
static_assert(std::ranges::empty(e));
static_assert(0 == e.size());
static_assert(e.begin() == nullptr);
static_assert(e.end() == nullptr);
static_assert(e.data() == nullptr);
static_assert(e.empty());
static_assert(std::ranges::begin(e) == nullptr);
static_assert(std::ranges::end(e) == nullptr);
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