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>& operator=(basic_string_view<charT, traits> sv); // constexpr since C++20
12
13 #include <string>
14 #include <cassert>
15
16 #include "test_macros.h"
17 #include "min_allocator.h"
18
19 template <class S, class SV>
20 TEST_CONSTEXPR_CXX20 void
test(S s1,SV sv)21 test(S s1, SV sv)
22 {
23 typedef typename S::traits_type T;
24 s1 = sv;
25 LIBCPP_ASSERT(s1.__invariants());
26 assert(s1.size() == sv.size());
27 assert(T::compare(s1.data(), sv.data(), s1.size()) == 0);
28 assert(s1.capacity() >= s1.size());
29 }
30
test()31 TEST_CONSTEXPR_CXX20 bool test() {
32 {
33 typedef std::string S;
34 typedef std::string_view SV;
35 test(S(), SV(""));
36 test(S("1"), SV(""));
37 test(S(), SV("1"));
38 test(S("1"), SV("2"));
39 test(S("1"), SV("2"));
40
41 test(S(),
42 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
43 test(S("123456789"),
44 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
45 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
46 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
47 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
48 "1234567890123456789012345678901234567890123456789012345678901234567890"),
49 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
50 }
51 #if TEST_STD_VER >= 11
52 {
53 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
54 typedef std::string_view SV;
55 test(S(), SV(""));
56 test(S("1"), SV(""));
57 test(S(), SV("1"));
58 test(S("1"), SV("2"));
59 test(S("1"), SV("2"));
60
61 test(S(),
62 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
63 test(S("123456789"),
64 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
65 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
66 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
67 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
68 "1234567890123456789012345678901234567890123456789012345678901234567890"),
69 SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
70 }
71 #endif
72
73 return true;
74 }
75
main(int,char **)76 int main(int, char**)
77 {
78 test();
79 #if TEST_STD_VER > 17
80 static_assert(test());
81 #endif
82
83 return 0;
84 }
85