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Vendor import of libc++ trunk r302418:
[FreeBSD/FreeBSD.git] / test / std / utilities / template.bitset / bitset.members / op_eq_eq.pass.cpp
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 <type_traits>
17 #include <cstdlib>
18 #include <cassert>
19
20 #include "test_macros.h"
21
22 #if defined(TEST_COMPILER_CLANG)
23 #pragma clang diagnostic ignored "-Wtautological-compare"
24 #elif defined(TEST_COMPILER_C1XX)
25 #pragma warning(disable: 6294) // Ill-defined for-loop:  initial condition does not satisfy test.  Loop body not executed.
26 #endif
27
28 template <std::size_t N>
29 std::bitset<N>
30 make_bitset()
31 {
32     std::bitset<N> v;
33     for (std::size_t i = 0; i < N; ++i)
34         v[i] = static_cast<bool>(std::rand() & 1);
35     return v;
36 }
37
38 template <std::size_t N>
39 void test_equality()
40 {
41     const std::bitset<N> v1 = make_bitset<N>();
42     std::bitset<N> v2 = v1;
43     assert(v1 == v2);
44     const bool greater_than_0 = std::integral_constant<bool, (N > 0)>::value; // avoid compiler warnings
45     if (greater_than_0)
46     {
47         v2[N/2].flip();
48         assert(v1 != v2);
49     }
50 }
51
52 int main()
53 {
54     test_equality<0>();
55     test_equality<1>();
56     test_equality<31>();
57     test_equality<32>();
58     test_equality<33>();
59     test_equality<63>();
60     test_equality<64>();
61     test_equality<65>();
62     test_equality<1000>();
63 }