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52066eae | 1 | // { dg-do run { target c++11 } } |
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2 | // { dg-require-cstdint "" } |
3 | // | |
a945c346 | 4 | // Copyright (C) 2012-2024 Free Software Foundation, Inc. |
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5 | // |
6 | // This file is part of the GNU ISO C++ Library. This library is free | |
7 | // software; you can redistribute it and/or modify it under the | |
8 | // terms of the GNU General Public License as published by the | |
9 | // Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | // | |
12 | // This library is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | // | |
17 | // You should have received a copy of the GNU General Public License along | |
18 | // with this library; see the file COPYING3. If not see | |
19 | // <http://www.gnu.org/licenses/>. | |
20 | ||
21 | #include <random> | |
22 | #include <testsuite_hooks.h> | |
23 | ||
24 | int f(int x) | |
25 | { | |
26 | std::seed_seq sq(&x, &x + 1); | |
27 | auto rnd = std::mt19937(sq); | |
28 | return std::uniform_int_distribution<int>()(rnd); | |
29 | } | |
30 | ||
31 | int g(int x) | |
32 | { | |
33 | std::seed_seq sq(&x, &x + 1); | |
34 | auto rnd = std::mt19937(); | |
35 | rnd.seed(sq); | |
36 | return std::uniform_int_distribution<int>()(rnd); | |
37 | } | |
38 | ||
39 | void test01() | |
40 | { | |
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41 | const int f1 = f(0); |
42 | const int f2 = f(0); | |
43 | ||
44 | const int g1 = g(0); | |
45 | const int g2 = g(0); | |
46 | ||
47 | VERIFY( f1 == f2 ); | |
48 | VERIFY( g1 == g2 ); | |
49 | VERIFY( f1 == g1 ); | |
50 | } | |
51 | ||
52 | int main() | |
53 | { | |
54 | test01(); | |
55 | return 0; | |
56 | } |