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 constexpr bool operator[](size_t pos) const;
10 
11 #include <bitset>
12 #include <cassert>
13 #include <cstddef>
14 #include <vector>
15 
16 #include "../bitset_test_cases.h"
17 #include "test_macros.h"
18 
19 template <std::size_t N>
test_index_const()20 void test_index_const() {
21     std::vector<std::bitset<N> > const cases = get_test_cases<N>();
22     for (std::size_t c = 0; c != cases.size(); ++c) {
23         std::bitset<N> const v = cases[c];
24         if (v.size() > 0) {
25             assert(v[N/2] == v.test(N/2));
26         }
27     }
28 #if !defined(_LIBCPP_VERSION) || defined(_LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL)
29     ASSERT_SAME_TYPE(decltype(cases[0][0]), bool);
30 #else
31     ASSERT_SAME_TYPE(decltype(cases[0][0]), typename std::bitset<N>::const_reference);
32 #endif
33 }
34 
main(int,char **)35 int main(int, char**) {
36     test_index_const<0>();
37     test_index_const<1>();
38     test_index_const<31>();
39     test_index_const<32>();
40     test_index_const<33>();
41     test_index_const<63>();
42     test_index_const<64>();
43     test_index_const<65>();
44     test_index_const<1000>();
45 
46   std::bitset<1> set_;
47   set_[0] = false;
48   const auto& set = set_;
49   auto b = set[0];
50   set_[0] = true;
51 #if !defined(_LIBCPP_VERSION) || defined(_LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL)
52   assert(!b);
53 #else
54   assert(b);
55 #endif
56 
57     return 0;
58 }
59