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 | // <vector> |
10 | |
11 | #include <cassert> |
12 | #include <vector> |
13 | |
14 | #include "test_macros.h" |
15 | |
16 | TEST_CONSTEXPR_CXX20 bool test() { |
17 | using CRefT = std::vector<bool>::const_reference; |
18 | #if !defined(_LIBCPP_VERSION) || defined(_LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL) |
19 | ASSERT_SAME_TYPE(CRefT, bool); |
20 | #else |
21 | ASSERT_SAME_TYPE(CRefT, std::__bit_const_reference<std::vector<bool> >); |
22 | std::vector<bool> vec; |
23 | vec.push_back(true); |
24 | CRefT ref = vec[0]; |
25 | assert(ref); |
26 | vec[0] = false; |
27 | assert(!ref); |
28 | #endif |
29 | |
30 | return true; |
31 | } |
32 | |
33 | int main(int, char**) { |
34 | test(); |
35 | #if TEST_STD_VER > 17 |
36 | static_assert(test()); |
37 | #endif |
38 | |
39 | return 0; |
40 | } |
41 | |