| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03, c++11 |
| |
| // <propagate_const> |
| |
| // template <class T> struct hash<experimental::fundamentals_v2::propagate_const<T>>; |
| |
| #include <experimental/propagate_const> |
| #include "test_macros.h" |
| #include "propagate_const_helpers.h" |
| #include <cassert> |
| |
| using std::experimental::propagate_const; |
| |
| namespace std { |
| template <> struct hash<X> |
| { |
| typedef X first_argument_type; |
| |
| size_t operator()(const first_argument_type&) const |
| { |
| return 99; |
| } |
| |
| }; |
| } // namespace std |
| |
| int main(int, char**) { |
| |
| typedef propagate_const<X> P; |
| |
| P p(1); |
| |
| auto h = std::hash<P>(); |
| |
| assert(h(p)==99); |
| |
| return 0; |
| } |