1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <random>
10
11// template <class UIntType, size_t w, size_t n, size_t m, size_t r,
12// UIntType a, size_t u, UIntType d, size_t s,
13// UIntType b, size_t t, UIntType c, size_t l, UIntType f>
14// class mersenne_twister_engine
15// {
16// public:
17// // types
18// typedef UIntType result_type;
19//
20// // engine characteristics
21// static constexpr size_t word_size = w;
22// static constexpr size_t state_size = n;
23// static constexpr size_t shift_size = m;
24// static constexpr size_t mask_bits = r;
25// static constexpr result_type xor_mask = a;
26// static constexpr size_t tempering_u = u;
27// static constexpr result_type tempering_d = d;
28// static constexpr size_t tempering_s = s;
29// static constexpr result_type tempering_b = b;
30// static constexpr size_t tempering_t = t;
31// static constexpr result_type tempering_c = c;
32// static constexpr size_t tempering_l = l;
33// static constexpr result_type initialization_multiplier = f;
34// static constexpr result_type min () { return 0; }
35// static constexpr result_type max() { return 2^w - 1; }
36// static constexpr result_type default_seed = 5489u;
37
38#include <random>
39#include <type_traits>
40#include <cassert>
41
42#include "test_macros.h"
43
44template <class T>
45void where(const T &) {}
46
47void
48test1()
49{
50 typedef std::mt19937 E;
51 static_assert((E::word_size == 32), "");
52 static_assert((E::state_size == 624), "");
53 static_assert((E::shift_size == 397), "");
54 static_assert((E::mask_bits == 31), "");
55 static_assert((E::xor_mask == 0x9908b0df), "");
56 static_assert((E::tempering_u == 11), "");
57 static_assert((E::tempering_d == 0xffffffff), "");
58 static_assert((E::tempering_s == 7), "");
59 static_assert((E::tempering_b == 0x9d2c5680), "");
60 static_assert((E::tempering_t == 15), "");
61 static_assert((E::tempering_c == 0xefc60000), "");
62 static_assert((E::tempering_l == 18), "");
63 static_assert((E::initialization_multiplier == 1812433253), "");
64#if TEST_STD_VER >= 11
65 static_assert((E::min() == 0), "");
66 static_assert((E::max() == 0xFFFFFFFF), "");
67#else
68 assert((E::min() == 0));
69 assert((E::max() == 0xFFFFFFFF));
70#endif
71 static_assert((E::default_seed == 5489u), "");
72 where(E::word_size);
73 where(E::state_size);
74 where(E::shift_size);
75 where(E::mask_bits);
76 where(E::xor_mask);
77 where(E::tempering_u);
78 where(E::tempering_d);
79 where(E::tempering_s);
80 where(E::tempering_b);
81 where(E::tempering_t);
82 where(E::tempering_c);
83 where(E::tempering_l);
84 where(E::initialization_multiplier);
85 where(E::default_seed);
86}
87
88void
89test2()
90{
91 typedef std::mt19937_64 E;
92 static_assert((E::word_size == 64), "");
93 static_assert((E::state_size == 312), "");
94 static_assert((E::shift_size == 156), "");
95 static_assert((E::mask_bits == 31), "");
96 static_assert((E::xor_mask == 0xb5026f5aa96619e9ull), "");
97 static_assert((E::tempering_u == 29), "");
98 static_assert((E::tempering_d == 0x5555555555555555ull), "");
99 static_assert((E::tempering_s == 17), "");
100 static_assert((E::tempering_b == 0x71d67fffeda60000ull), "");
101 static_assert((E::tempering_t == 37), "");
102 static_assert((E::tempering_c == 0xfff7eee000000000ull), "");
103 static_assert((E::tempering_l == 43), "");
104 static_assert((E::initialization_multiplier == 6364136223846793005ull), "");
105#if TEST_STD_VER >= 11
106 static_assert((E::min() == 0), "");
107 static_assert((E::max() == 0xFFFFFFFFFFFFFFFFull), "");
108#else
109 assert((E::min() == 0));
110 assert((E::max() == 0xFFFFFFFFFFFFFFFFull));
111#endif
112 static_assert((E::default_seed == 5489u), "");
113 where(E::word_size);
114 where(E::state_size);
115 where(E::shift_size);
116 where(E::mask_bits);
117 where(E::xor_mask);
118 where(E::tempering_u);
119 where(E::tempering_d);
120 where(E::tempering_s);
121 where(E::tempering_b);
122 where(E::tempering_t);
123 where(E::tempering_c);
124 where(E::tempering_l);
125 where(E::initialization_multiplier);
126 where(E::default_seed);
127}
128
129int main(int, char**)
130{
131 test1();
132 test2();
133
134 return 0;
135}
136

source code of libcxx/test/std/numerics/rand/rand.eng/rand.eng.mers/values.pass.cpp