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 // UNSUPPORTED: c++03
10 
11 // XFAIL: LIBCXX-AIX-FIXME
12 
13 // <string>
14 
15 // basic_string(basic_string<charT,traits,Allocator>&& str); // constexpr since C++20
16 
17 #include <string>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 #include "test_allocator.h"
22 #include "min_allocator.h"
23 
24 template <class S>
25 TEST_CONSTEXPR_CXX20 void
26 test(S s0)
27 {
28     S s1 = s0;
29     S s2 = std::move(s0);
30     LIBCPP_ASSERT(s2.__invariants());
31     LIBCPP_ASSERT(s0.__invariants());
32     assert(s2 == s1);
33     assert(s2.capacity() >= s2.size());
34     assert(s2.get_allocator() == s1.get_allocator());
35 }
36 
37 TEST_CONSTEXPR_CXX20 bool test() {
38   {
39     typedef test_allocator<char> A;
40     typedef std::basic_string<char, std::char_traits<char>, A> S;
41     test(S(A(3)));
42     test(S("1", A(5)));
43     test(S("1234567890123456789012345678901234567890123456789012345678901234567890", A(7)));
44   }
45   {
46     typedef min_allocator<char> A;
47     typedef std::basic_string<char, std::char_traits<char>, A> S;
48     test(S(A{}));
49     test(S("1", A()));
50     test(S("1234567890123456789012345678901234567890123456789012345678901234567890", A()));
51   }
52 
53   return true;
54 }
55 
56 int main(int, char**)
57 {
58   test();
59 #if TEST_STD_VER > 17
60   static_assert(test());
61 #endif
62 
63   return 0;
64 }
65