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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <random>
// template <class UIntType, UIntType a, UIntType c, UIntType m>
// class linear_congruential_engine
// {
// public:
// engine characteristics
// static constexpr result_type multiplier = a;
// static constexpr result_type increment = c;
// static constexpr result_type modulus = m;
// static constexpr result_type min() { return c == 0u ? 1u: 0u;}
// static constexpr result_type max() { return m - 1u;}
// static constexpr result_type default_seed = 1u;
#include <random>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
template <class _Tp>
void where(const _Tp &) {}
template <class T, T a, T c, T m>
void
test1()
{
typedef std::linear_congruential_engine<T, a, c, m> LCE;
typedef typename LCE::result_type result_type;
static_assert((LCE::multiplier == a), "");
static_assert((LCE::increment == c), "");
static_assert((LCE::modulus == m), "");
#if TEST_STD_VER >= 11
static_assert((LCE::min() == (c == 0u ? 1u: 0u)), "");
#else
assert((LCE::min() == (c == 0u ? 1u: 0u)));
#endif
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4310) // cast truncates constant value
#endif // _MSC_VER
#if TEST_STD_VER >= 11
static_assert((LCE::max() == result_type(m - 1u)), "");
#else
assert((LCE::max() == result_type(m - 1u)));
#endif
#ifdef _MSC_VER
#pragma warning(pop)
#endif // _MSC_VER
static_assert((LCE::default_seed == 1), "");
where(LCE::multiplier);
where(LCE::increment);
where(LCE::modulus);
where(LCE::default_seed);
}
template <class T>
void
test()
{
test1<T, 0, 0, 0>();
test1<T, 0, 1, 2>();
test1<T, 1, 1, 2>();
const T M(static_cast<T>(-1));
test1<T, 0, 0, M>();
test1<T, 0, M-2, M>();
test1<T, 0, M-1, M>();
test1<T, M-2, 0, M>();
test1<T, M-2, M-2, M>();
test1<T, M-2, M-1, M>();
test1<T, M-1, 0, M>();
test1<T, M-1, M-2, M>();
test1<T, M-1, M-1, M>();
}
int main()
{
test<unsigned short>();
test<unsigned int>();
test<unsigned long>();
test<unsigned long long>();
}
|
