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 constexpr bool operator[](size_t pos) const;
11
12#include <bitset>
13#include <cstdlib>
14#include <cassert>
15
16#pragma clang diagnostic ignored "-Wtautological-compare"
17
18template <std::size_t N>
19std::bitset<N>
20make_bitset()
21{
22    std::bitset<N> v;
23    for (std::size_t i = 0; i < N; ++i)
24        v[i] = static_cast<bool>(std::rand() & 1);
25    return v;
26}
27
28template <std::size_t N>
29void test_index_const()
30{
31    const std::bitset<N> v1 = make_bitset<N>();
32    if (N > 0)
33    {
34        assert(v1[N/2] == v1.test(N/2));
35    }
36}
37
38int main()
39{
40    test_index_const<0>();
41    test_index_const<1>();
42    test_index_const<31>();
43    test_index_const<32>();
44    test_index_const<33>();
45    test_index_const<63>();
46    test_index_const<64>();
47    test_index_const<65>();
48    test_index_const<1000>();
49}
50