1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// 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 "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() {
typedef propagate_const<X> P;
P p(1);
auto h = std::hash<P>();
assert(h(p)==99);
}
|
