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1 | // { dg-options "-std=gnu++11" } |
2 | // { dg-do compile } | |
3 | ||
aa118a03 | 4 | // Copyright (C) 2012-2014 Free Software Foundation, Inc. |
b16212bd PC |
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 | |
18 | // along with this library; see the file COPYING3. If not see | |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | #include <type_traits> | |
22 | #include <functional> | |
23 | ||
24 | class S{}; // No hash specialization | |
25 | ||
26 | template<class T> | |
27 | auto f(int) -> decltype(std::hash<T>(), std::true_type()); | |
28 | ||
29 | template<class T> | |
30 | auto f(...) -> decltype(std::false_type()); | |
31 | ||
32 | static_assert(!decltype(f<S>(0))::value, ""); |