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<charT,traits,Allocator>&
12 // assign(basic_string<charT,traits>&& str); // constexpr since C++20
13
14 #include <string>
15 #include <utility>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "min_allocator.h"
20
21 template <class S>
22 TEST_CONSTEXPR_CXX20 void
test(S s,S str,S expected)23 test(S s, S str, S expected)
24 {
25 s.assign(std::move(str));
26 LIBCPP_ASSERT(s.__invariants());
27 assert(s == expected);
28 }
29
test()30 TEST_CONSTEXPR_CXX20 bool test() {
31 {
32 typedef std::string S;
33 test(S(), S(), S());
34 test(S(), S("12345"), S("12345"));
35 test(S(), S("1234567890"), S("1234567890"));
36 test(S(), S("12345678901234567890"), S("12345678901234567890"));
37
38 test(S("12345"), S(), S());
39 test(S("12345"), S("12345"), S("12345"));
40 test(S("12345"), S("1234567890"), S("1234567890"));
41 test(S("12345"), S("12345678901234567890"), S("12345678901234567890"));
42
43 test(S("1234567890"), S(), S());
44 test(S("1234567890"), S("12345"), S("12345"));
45 test(S("1234567890"), S("1234567890"), S("1234567890"));
46 test(S("1234567890"), S("12345678901234567890"), S("12345678901234567890"));
47
48 test(S("12345678901234567890"), S(), S());
49 test(S("12345678901234567890"), S("12345"), S("12345"));
50 test(S("12345678901234567890"), S("1234567890"), S("1234567890"));
51 test(S("12345678901234567890"), S("12345678901234567890"),
52 S("12345678901234567890"));
53 }
54 #if TEST_STD_VER >= 11
55 {
56 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
57 test(S(), S(), S());
58 test(S(), S("12345"), S("12345"));
59 test(S(), S("1234567890"), S("1234567890"));
60 test(S(), S("12345678901234567890"), S("12345678901234567890"));
61
62 test(S("12345"), S(), S());
63 test(S("12345"), S("12345"), S("12345"));
64 test(S("12345"), S("1234567890"), S("1234567890"));
65 test(S("12345"), S("12345678901234567890"), S("12345678901234567890"));
66
67 test(S("1234567890"), S(), S());
68 test(S("1234567890"), S("12345"), S("12345"));
69 test(S("1234567890"), S("1234567890"), S("1234567890"));
70 test(S("1234567890"), S("12345678901234567890"), S("12345678901234567890"));
71
72 test(S("12345678901234567890"), S(), S());
73 test(S("12345678901234567890"), S("12345"), S("12345"));
74 test(S("12345678901234567890"), S("1234567890"), S("1234567890"));
75 test(S("12345678901234567890"), S("12345678901234567890"),
76 S("12345678901234567890"));
77 }
78 #endif
79
80 return true;
81 }
82
main(int,char **)83 int main(int, char**)
84 {
85 test();
86 #if TEST_STD_VER > 17
87 static_assert(test());
88 #endif
89
90 return 0;
91 }
92