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, UIntType a, UIntType c, UIntType m>
12// class linear_congruential_engine;
13
14// result_type operator()();
15
16#include <random>
17#include <cassert>
18
19#include "test_macros.h"
20
21template <class T>
22void
23randu()
24{
25 typedef std::linear_congruential_engine<T, 65539, 0, 2147483648u> E;
26 E e(1);
27 assert(e() == 65539);
28 assert(e() == 393225);
29 assert(e() == 1769499);
30 assert(e() == 7077969);
31 assert(e() == 26542323);
32 assert(e() == 95552217);
33 assert(e() == 334432395);
34 assert(e() == 1146624417);
35 assert(e() == 1722371299);
36 assert(e() == 14608041);
37 assert(e() == 1766175739);
38 assert(e() == 1875647473);
39}
40
41template <class T>
42void
43minstd()
44{
45 typedef std::linear_congruential_engine<T, 16807, 0, 2147483647> E;
46 E e(1);
47 assert(e() == 16807);
48 assert(e() == 282475249);
49 assert(e() == 1622650073);
50 assert(e() == 984943658);
51 assert(e() == 1144108930);
52 assert(e() == 470211272);
53 assert(e() == 101027544);
54 assert(e() == 1457850878);
55 assert(e() == 1458777923);
56 assert(e() == 2007237709);
57 assert(e() == 823564440);
58 assert(e() == 1115438165);
59}
60
61template <class T>
62void
63Haldir()
64{
65 typedef std::linear_congruential_engine<T, 16807, 78125, 2147483647> E;
66 E e(207560540);
67 assert(e() == 956631177);
68 assert(e() == 2037688522);
69 assert(e() == 1509348670);
70 assert(e() == 1546336451);
71 assert(e() == 429714088);
72 assert(e() == 217250280);
73}
74
75int main(int, char**)
76{
77 randu<unsigned int>();
78 randu<unsigned long>();
79 randu<unsigned long long>();
80
81 minstd<unsigned int>();
82 minstd<unsigned long>();
83 minstd<unsigned long long>();
84
85 Haldir<unsigned int>();
86 Haldir<unsigned long>();
87 Haldir<unsigned long long>();
88
89 return 0;
90}
91

source code of libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/eval.pass.cpp