integral.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976 
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// <functional>
11
12// template <class T>
13// struct hash
14//     : public unary_function<T, size_t>
15// {
16//     size_t operator()(T val) const;
17// };
18
19// Not very portable
20
21#include <functional>
22#include <cassert>
23#include <type_traits>
24#include <limits>
25
26template <class T>
27void
28test()
29{
30    static_assert((std::is_base_of<std::unary_function<T, std::size_t>,
31                                   std::hash<T> >::value), "");
32    std::hash<T> h;
33    for (int i = 0; i <= 5; ++i)
34    {
35        T t(i);
36        assert(h(t) == t);
37    }
38}
39
40int main()
41{
42    test<bool>();
43    test<char>();
44    test<signed char>();
45    test<unsigned char>();
46    test<char16_t>();
47    test<char32_t>();
48    test<wchar_t>();
49    test<short>();
50    test<unsigned short>();
51    test<int>();
52    test<unsigned int>();
53    test<long>();
54    test<unsigned long>();
55    test<long long>();
56    test<unsigned long long>();
57}
58