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// Copyright (C) 2020 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 <ranges>
#include <testsuite_hooks.h>
#include <testsuite_iterators.h>
using __gnu_test::test_range;
using __gnu_test::forward_iterator_wrapper;
namespace ranges = std::ranges;
namespace views = std::ranges::views;
void
test01()
{
auto p = [] (int i) { return i != 16; };
auto v = views::iota(10) | views::take_while(p);
VERIFY( ranges::equal(v, (int[]){10,11,12,13,14,15}) );
using R = decltype(v);
static_assert(ranges::view<R>);
static_assert(!ranges::common_range<R>);
static_assert(ranges::random_access_range<R>);
}
void
test02()
{
int x[] = {1,2,3,4,5};
test_range<int, forward_iterator_wrapper> rx(x);
auto v = rx | views::take_while([] (int i) { return i<4; });
VERIFY( ranges::equal(v, (int[]){1,2,3}) );
using R = decltype(v);
static_assert(ranges::view<R>);
static_assert(!ranges::common_range<R>);
static_assert(ranges::forward_range<R>);
}
int
main()
{
test01();
test02();
}
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