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1 | // { dg-options "-std=gnu++2a" } |
2 | // { dg-do compile { target c++2a } } | |
3 | ||
99dee823 | 4 | // Copyright (C) 2020-2021 Free Software Foundation, Inc. |
120e8734 JW |
5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | ||
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | ||
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING3. If not see | |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | #include <iterator> | |
8566286e | 22 | #include <istream> |
120e8734 JW |
23 | |
24 | // C++20 doesn't require this to be non-throwing. | |
25 | static_assert( std::is_nothrow_constructible_v<std::istream_iterator<int>, | |
26 | std::default_sentinel_t> ); | |
27 | ||
28 | constexpr std::istream_iterator<int> i = std::default_sentinel; | |
8566286e JW |
29 | |
30 | struct X { X() noexcept(false); }; | |
31 | std::istream& operator<<(std::istream&, X&); | |
32 | ||
33 | static_assert( std::is_constructible_v<std::istream_iterator<X>, | |
34 | std::default_sentinel_t> ); | |
35 | static_assert( ! std::is_nothrow_constructible_v<std::istream_iterator<X>, | |
36 | std::default_sentinel_t> ); |