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