[thirdparty/gcc.git] / libstdc++-v3 / testsuite / std / ranges / iota / lwg3292_neg.cc

// 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 compile { target c++2a } }

#include <sstream>
#include <ranges>

namespace ranges = std::ranges;
namespace views = std::views;

void
test01()
{
  std::istringstream s("1 2 3 4 5");
  auto v = ranges::istream_view<int>(s);
  auto i = v.begin();
  static_assert(!std::semiregular<decltype(i)>);
  auto o = views::iota(std::move(i));
  static_assert(false); // { dg-error "" }
}

// { dg-prune-output "no match" }
// { dg-prune-output "deduction failed" }
// { dg-prune-output "constraint failure" }
// { dg-prune-output "in requirements" }
Commit	Line	Data
7adcbafe	1	// Copyright (C) 2020-2022 Free Software Foundation, Inc.
7f0f1083 PP	2	//
	3	// This file is part of the GNU ISO C++ Library. This library is free
	4	// software; you can redistribute it and/or modify it under the
	5	// terms of the GNU General Public License as published by the
	6	// Free Software Foundation; either version 3, or (at your option)
	7	// any later version.
	8
	9	// This library is distributed in the hope that it will be useful,
	10	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	// GNU General Public License for more details.
	13
	14	// You should have received a copy of the GNU General Public License along
	15	// with this library; see the file COPYING3. If not see
	16	// <http://www.gnu.org/licenses/>.
	17
	18	// { dg-options "-std=gnu++2a" }
	19	// { dg-do compile { target c++2a } }
	20
	21	#include <sstream>
	22	#include <ranges>
	23
	24	namespace ranges = std::ranges;
	25	namespace views = std::views;
	26
	27	void
	28	test01()
	29	{
	30	std::istringstream s("1 2 3 4 5");
	31	auto v = ranges::istream_view<int>(s);
	32	auto i = v.begin();
	33	static_assert(!std::semiregular<decltype(i)>);
	34	auto o = views::iota(std::move(i));
	35	static_assert(false); // { dg-error "" }
	36	}
	37
	38	// { dg-prune-output "no match" }
	39	// { dg-prune-output "deduction failed" }
	40	// { dg-prune-output "constraint failure" }
7d0cddce	41	// { dg-prune-output "in requirements" }