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 // append(const basic_string<charT,traits>& str);
13
14 #include <string>
15 #include <cassert>
16
17 #include "test_macros.h"
18 #include "min_allocator.h"
19
20 template <class S>
21 void
test(S s,S str,S expected)22 test(S s, S str, S expected)
23 {
24 s.append(str);
25 LIBCPP_ASSERT(s.__invariants());
26 assert(s == expected);
27 }
28
main(int,char **)29 int main(int, char**)
30 {
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("12345"));
39 test(S("12345"), S("12345"), S("1234512345"));
40 test(S("12345"), S("1234567890"), S("123451234567890"));
41 test(S("12345"), S("12345678901234567890"), S("1234512345678901234567890"));
42
43 test(S("1234567890"), S(), S("1234567890"));
44 test(S("1234567890"), S("12345"), S("123456789012345"));
45 test(S("1234567890"), S("1234567890"), S("12345678901234567890"));
46 test(S("1234567890"), S("12345678901234567890"), S("123456789012345678901234567890"));
47
48 test(S("12345678901234567890"), S(), S("12345678901234567890"));
49 test(S("12345678901234567890"), S("12345"), S("1234567890123456789012345"));
50 test(S("12345678901234567890"), S("1234567890"), S("123456789012345678901234567890"));
51 test(S("12345678901234567890"), S("12345678901234567890"),
52 S("1234567890123456789012345678901234567890"));
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("12345"));
63 test(S("12345"), S("12345"), S("1234512345"));
64 test(S("12345"), S("1234567890"), S("123451234567890"));
65 test(S("12345"), S("12345678901234567890"), S("1234512345678901234567890"));
66
67 test(S("1234567890"), S(), S("1234567890"));
68 test(S("1234567890"), S("12345"), S("123456789012345"));
69 test(S("1234567890"), S("1234567890"), S("12345678901234567890"));
70 test(S("1234567890"), S("12345678901234567890"), S("123456789012345678901234567890"));
71
72 test(S("12345678901234567890"), S(), S("12345678901234567890"));
73 test(S("12345678901234567890"), S("12345"), S("1234567890123456789012345"));
74 test(S("12345678901234567890"), S("1234567890"), S("123456789012345678901234567890"));
75 test(S("12345678901234567890"), S("12345678901234567890"),
76 S("1234567890123456789012345678901234567890"));
77 }
78 #endif
79
80 #if TEST_STD_VER > 3
81 { // LWG 2946
82 std::string s;
83 s.append({"abc", 1});
84 assert(s.size() == 1);
85 assert(s == "a");
86 }
87 #endif
88
89 return 0;
90 }
91