blob: b8f85e193dc8f68b72a8de5b6edd1c0e9075c5cc (
plain)
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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
// <functional>
// template <class T>
// struct hash
// : public unary_function<T, size_t>
// {
// size_t operator()(T val) const;
// };
// Not very portable
#include <functional>
#include <cassert>
#include <type_traits>
#include <limits>
#include <cmath>
#include "test_macros.h"
template <class T>
void
test()
{
typedef std::hash<T> H;
#if TEST_STD_VER <= 17
static_assert((std::is_same<typename H::argument_type, T>::value), "");
static_assert((std::is_same<typename H::result_type, std::size_t>::value), "");
#endif
ASSERT_NOEXCEPT(H()(T()));
H h;
std::size_t t0 = h(0.);
std::size_t tn0 = h(-0.);
std::size_t tp1 = h(static_cast<T>(0.1));
std::size_t t1 = h(1);
std::size_t tn1 = h(-1);
std::size_t pinf = h(INFINITY);
std::size_t ninf = h(-INFINITY);
assert(t0 == tn0);
assert(t0 != tp1);
assert(t0 != t1);
assert(t0 != tn1);
assert(t0 != pinf);
assert(t0 != ninf);
assert(tp1 != t1);
assert(tp1 != tn1);
assert(tp1 != pinf);
assert(tp1 != ninf);
assert(t1 != tn1);
assert(t1 != pinf);
assert(t1 != ninf);
assert(tn1 != pinf);
assert(tn1 != ninf);
assert(pinf != ninf);
}
int main(int, char**)
{
test<float>();
test<double>();
test<long double>();
return 0;
}
|
