1 // Copyright (C) 2019-2020 Free Software Foundation, Inc.
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)
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.
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/>.
18 // { dg-options "-std=gnu++2a" }
19 // { dg-do compile { target c++2a } }
23 // C++20 [iterator.traits]: The type iterator_traits<I>::pointer shall be void
24 // for an iterator of class type I that does not support operator->.
26 concept arrow_or_no_pointer
= requires (I i
) { i
.operator->(); }
27 || std::same_as
<typename
std::iterator_traits
<I
>::pointer
, void>;
29 static_assert( arrow_or_no_pointer
<std::vector
<bool>::iterator
> );
30 static_assert( arrow_or_no_pointer
<std::vector
<bool>::const_iterator
> );