1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // test:
11 
12 // bool operator==(const bitset<N>& rhs) const;
13 // bool operator!=(const bitset<N>& rhs) const;
14 
15 #include <bitset>
16 #include <cstdlib>
17 #include <cassert>
18 
19 #pragma clang diagnostic ignored "-Wtautological-compare"
20 
21 template <std::size_t N>
22 std::bitset<N>
make_bitset()23 make_bitset()
24 {
25     std::bitset<N> v;
26     for (std::size_t i = 0; i < N; ++i)
27         v[i] = static_cast<bool>(std::rand() & 1);
28     return v;
29 }
30 
31 template <std::size_t N>
test_equality()32 void test_equality()
33 {
34     const std::bitset<N> v1 = make_bitset<N>();
35     std::bitset<N> v2 = v1;
36     assert(v1 == v2);
37     if (N > 0)
38     {
39         v2[N/2].flip();
40         assert(v1 != v2);
41     }
42 }
43 
main()44 int main()
45 {
46     test_equality<0>();
47     test_equality<1>();
48     test_equality<31>();
49     test_equality<32>();
50     test_equality<33>();
51     test_equality<63>();
52     test_equality<64>();
53     test_equality<65>();
54     test_equality<1000>();
55 }
56