1 // Copyright (C) 2020-2021 Free Software Foundation, Inc.
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-additional-options "-O -Wall" }
20 // { dg-do compile { target c++2a } }
21
22 #include <ranges>
23 #include <vector>
24
25 namespace ranges = std::ranges;
26 namespace views = std::views;
27
28 auto
test()29 test()
30 {
31 std::vector<std::string> x = {""};
32 auto i = std::counted_iterator(x.begin(), 1);
33 auto r = ranges::subrange{i, std::default_sentinel};
34 auto v = r | views::join;
35 return v;
36 }
37