xref: /llvm-project/libcxx/test/std/numerics/rand/rand.eng/rand.eng.sub/assign.pass.cpp (revision 7fc6a55688c816f5fc1a5481ae7af25be7500356)
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 s, size_t r>
12 // class subtract_with_carry_engine;
13 
14 // subtract_with_carry_engine& operator=(const subtract_with_carry_engine&);
15 
16 #include <random>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 void
test1()22 test1()
23 {
24     typedef std::ranlux24_base E;
25     E e1(2);
26     (void)e1();
27     E e2(5);
28     e2 = e1;
29     assert(e1 == e2);
30     assert(e1() == e2());
31     E::result_type k = e1();
32     assert(e1 != e2);
33     assert(e2() == k);
34     assert(e1 == e2);
35 }
36 
37 void
test2()38 test2()
39 {
40     typedef std::ranlux48_base E;
41     E e1(3);
42     (void)e1();
43     E e2(5);
44     e2 = e1;
45     assert(e1 == e2);
46     assert(e1() == e2());
47     E::result_type k = e1();
48     assert(e1 != e2);
49     assert(e2() == k);
50     assert(e1 == e2);
51 }
52 
main(int,char **)53 int main(int, char**)
54 {
55     test1();
56     test2();
57 
58   return 0;
59 }
60