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
44 template <class T>
where(const T &)45 void where(const T &) {}
46
47 void
test1()48 test1()
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
88 void
test2()89 test2()
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
main(int,char **)129 int main(int, char**)
130 {
131 test1();
132 test2();
133
134 return 0;
135 }
136