xref: /llvm-project/libcxx/test/std/containers/sequences/vector.bool/reference/ctor_copy.pass.cpp (revision 98d3d5b5da66e3cf7807c23a0294280bb796466b)
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 // reference(const reference&)
12 
13 #include <cassert>
14 #include <vector>
15 
16 #include "test_macros.h"
17 
test()18 TEST_CONSTEXPR_CXX20 bool test() {
19   std::vector<bool> vec;
20   typedef std::vector<bool>::reference Ref;
21   vec.push_back(true);
22   Ref ref = vec[0];
23   Ref ref2 = ref;
24   assert(ref == ref2 && ref2);
25   ref.flip();
26   assert(ref == ref2 && !ref2);
27 
28   return true;
29 }
30 
main(int,char **)31 int main(int, char**) {
32   test();
33 #if TEST_STD_VER > 17
34     static_assert(test());
35 #endif
36 
37   return 0;
38 }
39