| // Copyright (C) 2020-2023 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 } } |
| // { dg-require-effective-target hosted } |
| |
| #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" } |
