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1 | // (C) Copyright John Maddock 2005. |
2 | // Use, modification and distribution are subject to the | |
3 | // Boost Software License, Version 1.0. (See accompanying file | |
4 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | #ifdef TEST_STD_HEADERS | |
7 | #include <functional> | |
8 | #else | |
9 | #include <boost/tr1/functional.hpp> | |
10 | #endif | |
11 | ||
12 | #include <string> | |
13 | #include <boost/static_assert.hpp> | |
14 | #include <boost/type_traits/is_same.hpp> | |
15 | #include <boost/type_traits/is_base_of.hpp> | |
16 | #include "verify_return.hpp" | |
17 | ||
18 | template <class T> | |
19 | void check_hash(T t) | |
20 | { | |
21 | typedef std::tr1::hash<T> hash_type; | |
22 | typedef typename hash_type::argument_type arg_type; | |
23 | typedef typename hash_type::result_type result_type; | |
24 | BOOST_STATIC_ASSERT((::boost::is_same<result_type, std::size_t>::value)); | |
25 | BOOST_STATIC_ASSERT((::boost::is_same<arg_type, T>::value)); | |
26 | BOOST_STATIC_ASSERT((::boost::is_base_of<std::unary_function<arg_type, result_type>, hash_type>::value)); | |
27 | ||
28 | hash_type h; | |
29 | const hash_type& ch = h; | |
30 | ||
31 | verify_return_type(ch(t), std::size_t(0)); | |
32 | } | |
33 | ||
34 | class UDT | |
35 | { | |
36 | int m_value; | |
37 | public: | |
38 | UDT(int v) : m_value(v) {} | |
39 | int value()const { return m_value; } | |
40 | }; | |
41 | ||
42 | namespace std{ namespace tr1{ | |
43 | ||
44 | template<> | |
45 | struct hash<UDT> : public std::unary_function<UDT, std::size_t> | |
46 | { | |
47 | typedef UDT argument_type; | |
48 | typedef std::size_t result_type; | |
49 | std::size_t operator()(const UDT& u)const | |
50 | { | |
51 | std::tr1::hash<int> h; | |
52 | return h(u.value()); | |
53 | } | |
54 | }; | |
55 | ||
56 | }} | |
57 | ||
58 | int main() | |
59 | { | |
60 | check_hash(0); | |
61 | check_hash(0u); | |
62 | check_hash(0L); | |
63 | check_hash(0uL); | |
64 | check_hash(static_cast<short>(0)); | |
65 | check_hash(static_cast<unsigned short>(0)); | |
66 | check_hash(static_cast<signed char>(0)); | |
67 | check_hash(static_cast<unsigned char>(0)); | |
68 | check_hash(static_cast<char>(0)); | |
69 | check_hash(static_cast<wchar_t>(0)); | |
70 | check_hash(static_cast<bool>(0)); | |
71 | check_hash(static_cast<float>(0)); | |
72 | check_hash(static_cast<double>(0)); | |
73 | check_hash(static_cast<long double>(0)); | |
74 | check_hash(std::string("")); | |
75 | check_hash(std::wstring(L"")); | |
76 | check_hash(static_cast<UDT*>(0)); | |
77 | check_hash(static_cast<const UDT*>(0)); | |
78 | check_hash(static_cast<volatile UDT*>(0)); | |
79 | check_hash(static_cast<const volatile UDT*>(0)); | |
80 | check_hash(UDT(1)); | |
81 | return 0; | |
82 | } | |
83 |