1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef TEST_HASH_H
11#define TEST_HASH_H
12
13#include <cstddef>
14#include <type_traits>
15
16template <class C>
17class test_hash
18    : private C
19{
20    int data_;
21public:
22    explicit test_hash(int data = 0) : data_(data) {}
23
24    std::size_t
25    operator()(typename std::add_lvalue_reference<const typename C::argument_type>::type x) const
26        {return C::operator()(x);}
27
28    bool operator==(const test_hash& c) const
29        {return data_ == c.data_;}
30};
31
32#endif  // TEST_HASH_H
33