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// operator bool()
12
13#include <cassert>
14#include <type_traits>
15#include <vector>
16
17#include "test_macros.h"
18
19TEST_CONSTEXPR_CXX20 bool test() {
20 std::vector<bool> vec;
21 typedef std::vector<bool>::reference Ref;
22 static_assert(std::is_convertible<Ref, bool>::value, "");
23
24 vec.push_back(true);
25 vec.push_back(false);
26 Ref true_ref = vec[0];
27 Ref false_ref = vec[1];
28 bool b = true_ref;
29 assert(b);
30 assert(true_ref);
31 assert(!false_ref);
32
33 return true;
34}
35
36int main(int, char**) {
37 test();
38#if TEST_STD_VER > 17
39 static_assert(test());
40#endif
41
42 return 0;
43}
44

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