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(basic_string_view<charT,traits> sv); // constexpr since C++20
13
14 #include <string>
15 #include <string_view>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "min_allocator.h"
20
21 template <class S, class SV>
22 TEST_CONSTEXPR_CXX20 void
test(S s,SV sv,S expected)23 test(S s, SV sv, S expected)
24 {
25 s.append(sv);
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 typedef std::string_view SV;
34 test(S(), SV(), S());
35 test(S(), SV("12345"), S("12345"));
36 test(S(), SV("1234567890"), S("1234567890"));
37 test(S(), SV("12345678901234567890"), S("12345678901234567890"));
38
39 test(S("12345"), SV(), S("12345"));
40 test(S("12345"), SV("12345"), S("1234512345"));
41 test(S("12345"), SV("1234567890"), S("123451234567890"));
42 test(S("12345"), SV("12345678901234567890"), S("1234512345678901234567890"));
43
44 test(S("1234567890"), SV(), S("1234567890"));
45 test(S("1234567890"), SV("12345"), S("123456789012345"));
46 test(S("1234567890"), SV("1234567890"), S("12345678901234567890"));
47 test(S("1234567890"), SV("12345678901234567890"), S("123456789012345678901234567890"));
48
49 test(S("12345678901234567890"), SV(), S("12345678901234567890"));
50 test(S("12345678901234567890"), SV("12345"), S("1234567890123456789012345"));
51 test(S("12345678901234567890"), SV("1234567890"), S("123456789012345678901234567890"));
52 test(S("12345678901234567890"), SV("12345678901234567890"),
53 S("1234567890123456789012345678901234567890"));
54 }
55 #if TEST_STD_VER >= 11
56 {
57 typedef std::basic_string <char, std::char_traits<char>, min_allocator<char>> S;
58 typedef std::basic_string_view<char, std::char_traits<char> > SV;
59 test(S(), SV(), S());
60 test(S(), SV("12345"), S("12345"));
61 test(S(), SV("1234567890"), S("1234567890"));
62 test(S(), SV("12345678901234567890"), S("12345678901234567890"));
63
64 test(S("12345"), SV(), S("12345"));
65 test(S("12345"), SV("12345"), S("1234512345"));
66 test(S("12345"), SV("1234567890"), S("123451234567890"));
67 test(S("12345"), SV("12345678901234567890"), S("1234512345678901234567890"));
68
69 test(S("1234567890"), SV(), S("1234567890"));
70 test(S("1234567890"), SV("12345"), S("123456789012345"));
71 test(S("1234567890"), SV("1234567890"), S("12345678901234567890"));
72 test(S("1234567890"), SV("12345678901234567890"), S("123456789012345678901234567890"));
73
74 test(S("12345678901234567890"), SV(), S("12345678901234567890"));
75 test(S("12345678901234567890"), SV("12345"), S("1234567890123456789012345"));
76 test(S("12345678901234567890"), SV("1234567890"), S("123456789012345678901234567890"));
77 test(S("12345678901234567890"), SV("12345678901234567890"),
78 S("1234567890123456789012345678901234567890"));
79 }
80 #endif
81
82 return true;
83 }
84
main(int,char **)85 int main(int, char**)
86 {
87 test();
88 #if TEST_STD_VER > 17
89 static_assert(test());
90 #endif
91
92 return 0;
93 }
94