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 // test bool none() const;
10 
11 #include <bitset>
12 #include <type_traits>
13 #include <cassert>
14 
15 #include "test_macros.h"
16 
17 template <std::size_t N>
18 void test_none()
19 {
20     std::bitset<N> v;
21     v.reset();
22     assert(v.none() == true);
23     v.set();
24     assert(v.none() == (N == 0));
25     const bool greater_than_1 = std::integral_constant<bool, (N > 1)>::value; // avoid compiler warnings
26     if (greater_than_1)
27     {
28         v[N/2] = false;
29         assert(v.none() == false);
30         v.reset();
31         v[N/2] = true;
32         assert(v.none() == false);
33     }
34 }
35 
36 int main(int, char**)
37 {
38     test_none<0>();
39     test_none<1>();
40     test_none<31>();
41     test_none<32>();
42     test_none<33>();
43     test_none<63>();
44     test_none<64>();
45     test_none<65>();
46     test_none<1000>();
47 
48   return 0;
49 }
50