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); // constexpr since C++20
13
14#include <string>
15#include <cassert>
16
17#include "test_macros.h"
18#include "min_allocator.h"
19#include "asan_testing.h"
20
21template <class S>
22TEST_CONSTEXPR_CXX20 void test(S s, S str, S expected) {
23 s.append(str);
24 LIBCPP_ASSERT(s.__invariants());
25 assert(s == expected);
26 LIBCPP_ASSERT(is_string_asan_correct(s));
27}
28
29template <class S>
30TEST_CONSTEXPR_CXX20 void test_string() {
31 test(S(), S(), S());
32 test(S(), S("12345"), S("12345"));
33 test(S(), S("1234567890"), S("1234567890"));
34 test(S(), S("12345678901234567890"), S("12345678901234567890"));
35
36 test(S("12345"), S(), S("12345"));
37 test(S("12345"), S("12345"), S("1234512345"));
38 test(S("12345"), S("1234567890"), S("123451234567890"));
39 test(S("12345"), S("12345678901234567890"), S("1234512345678901234567890"));
40
41 test(S("1234567890"), S(), S("1234567890"));
42 test(S("1234567890"), S("12345"), S("123456789012345"));
43 test(S("1234567890"), S("1234567890"), S("12345678901234567890"));
44 test(S("1234567890"), S("12345678901234567890"), S("123456789012345678901234567890"));
45
46 test(S("12345678901234567890"), S(), S("12345678901234567890"));
47 test(S("12345678901234567890"), S("12345"), S("1234567890123456789012345"));
48 test(S("12345678901234567890"), S("1234567890"), S("123456789012345678901234567890"));
49 test(S("12345678901234567890"), S("12345678901234567890"), S("1234567890123456789012345678901234567890"));
50
51 // Starting from long string (no SSO)
52 test(S("123456789012345678901234567890"), S(), S("123456789012345678901234567890"));
53 test(S("123456789012345678901234567890"), S("12345"), S("12345678901234567890123456789012345"));
54 test(S("123456789012345678901234567890"), S("1234567890"), S("1234567890123456789012345678901234567890"));
55 test(S("123456789012345678901234567890"),
56 S("12345678901234567890"),
57 S("12345678901234567890123456789012345678901234567890"));
58}
59
60TEST_CONSTEXPR_CXX20 bool test() {
61 test_string<std::string>();
62#if TEST_STD_VER >= 11
63 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
64 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
65#endif
66
67#if TEST_STD_VER >= 11
68 { // LWG 2946
69 std::string s;
70 s.append({"abc", 1});
71 assert(s.size() == 1);
72 assert(s == "a");
73 }
74#endif
75
76 return true;
77}
78
79int main(int, char**) {
80 test();
81#if TEST_STD_VER > 17
82 static_assert(test());
83#endif
84
85 return 0;
86}
87

source code of libcxx/test/std/strings/basic.string/string.modifiers/string_append/string.pass.cpp