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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-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <ranges>
#include <testsuite_iterators.h>
#include <testsuite_hooks.h>
using __gnu_test::test_input_range;
namespace ranges = std::ranges;
struct my_range
{
static inline int x[] = {1,2,3};
static inline test_input_range<int> r{x};
bool called_begin = false;
auto
begin()
{
called_begin = true;
return r.begin();
}
auto
end()
{
return r.end();
}
ranges::range_difference_t<decltype(r)>
size()
{
VERIFY( !called_begin );
return 3;
}
};
void
test01()
{
my_range r;
static_assert(!ranges::forward_range<my_range>);
static_assert(ranges::sized_range<my_range>);
ranges::subrange sr = r;
VERIFY( ranges::size(sr) == 3 );
}
int
main()
{
test01();
}
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