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