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
16TEST_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
33int main(int, char**) {
34 test();
35#if TEST_STD_VER > 17
36 static_assert(test());
37#endif
38
39 return 0;
40}
41

source code of libcxx/test/std/containers/sequences/vector.bool/const_reference.pass.cpp