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// UNSUPPORTED: no-localization
10
11// <random>
12
13// template <class UIntType, UIntType a, UIntType c, UIntType m>
14// class linear_congruential_engine;
15
16// template <class charT, class traits,
17// class UIntType, UIntType a, UIntType c, UIntType m>
18// basic_ostream<charT, traits>&
19// operator<<(basic_ostream<charT, traits>& os,
20// const linear_congruential_engine<UIntType, a, c, m>& x);
21//
22// template <class charT, class traits,
23// class UIntType, UIntType a, UIntType c, UIntType m>
24// basic_istream<charT, traits>&
25// operator>>(basic_istream<charT, traits>& is,
26// linear_congruential_engine<UIntType, a, c, m>& x);
27
28#include <random>
29#include <sstream>
30#include <cassert>
31
32#include "test_macros.h"
33
34int main(int, char**)
35{
36 {
37 typedef std::linear_congruential_engine<unsigned, 48271, 0, 2147483647> E;
38 E e1;
39 e1.discard(z: 100);
40 std::ostringstream os;
41 os << e1;
42 std::istringstream is(os.str());
43 E e2;
44 is >> e2;
45 assert(e1 == e2);
46 }
47
48 return 0;
49}
50

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