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>& append(const charT* s); // constexpr since C++20
12
13#include <string>
14#include <stdexcept>
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, const typename S::value_type* 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());
32 test(S(), "12345", S("12345"));
33 test(S(), "12345678901234567890", S("12345678901234567890"));
34
35 test(S("12345"), "", S("12345"));
36 test(S("12345"), "12345", S("1234512345"));
37 test(S("12345"), "1234567890", S("123451234567890"));
38
39 test(S("12345678901234567890"), "", S("12345678901234567890"));
40 test(S("12345678901234567890"), "12345", S("1234567890123456789012345"));
41 test(S("12345678901234567890"), "12345678901234567890", S("1234567890123456789012345678901234567890"));
42}
43
44TEST_CONSTEXPR_CXX20 bool test() {
45 test_string<std::string>();
46#if TEST_STD_VER >= 11
47 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
48 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
49#endif
50
51 { // test appending to self
52 typedef std::string S;
53 S s_short = "123/";
54 S s_long = "Lorem ipsum dolor sit amet, consectetur/";
55
56 s_short.append(s: s_short.c_str());
57 assert(s_short == "123/123/");
58 s_short.append(s: s_short.c_str());
59 assert(s_short == "123/123/123/123/");
60 s_short.append(s: s_short.c_str());
61 assert(s_short == "123/123/123/123/123/123/123/123/");
62
63 s_long.append(s: s_long.c_str());
64 assert(s_long == "Lorem ipsum dolor sit amet, consectetur/Lorem ipsum dolor sit amet, consectetur/");
65 }
66 return true;
67}
68
69int main(int, char**) {
70 test();
71#if TEST_STD_VER > 17
72 static_assert(test());
73#endif
74
75 return 0;
76}
77

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