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 
16 template <class C>
17 class test_hash
18     : private C
19 {
20     int data_;
21 public:
data_(data)22     explicit test_hash(int data = 0) : data_(data) {}
23 
24     std::size_t
operator()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