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 Engine, size_t w, class UIntType>
12// class independent_bits_engine
13
14// void discard(unsigned long long z);
15
16#include <random>
17#include <cassert>
18
19#include "test_macros.h"
20
21void
22test1()
23{
24 std::independent_bits_engine<std::ranlux24, 32, unsigned> e1;
25 std::independent_bits_engine<std::ranlux24, 32, unsigned> e2 = e1;
26 assert(e1 == e2);
27 e1.discard(3);
28 assert(e1 != e2);
29 (void)e2();
30 (void)e2();
31 (void)e2();
32 assert(e1 == e2);
33}
34
35void
36test2()
37{
38 std::independent_bits_engine<std::ranlux48, 64, unsigned long long> e1;
39 std::independent_bits_engine<std::ranlux48, 64, unsigned long long> e2 = e1;
40 assert(e1 == e2);
41 e1.discard(z: 3);
42 assert(e1 != e2);
43 (void)e2();
44 (void)e2();
45 (void)e2();
46 assert(e1 == e2);
47}
48
49int main(int, char**)
50{
51 test1();
52 test2();
53
54 return 0;
55}
56

source code of libcxx/test/std/numerics/rand/rand.adapt/rand.adapt.ibits/discard.pass.cpp