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);
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 void
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 
31 int main()
32 {
33     {
34     typedef std::string S;
35     typedef std::string_view SV;
36     test(S(), SV(""));
37     test(S("1"), SV(""));
38     test(S(), SV("1"));
39     test(S("1"), SV("2"));
40     test(S("1"), SV("2"));
41 
42     test(S(),
43          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
44     test(S("123456789"),
45          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
46     test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
47          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
48     test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
49            "1234567890123456789012345678901234567890123456789012345678901234567890"),
50          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
51     }
52 #if TEST_STD_VER >= 11
53     {
54     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
55     typedef std::string_view SV;
56     test(S(), SV(""));
57     test(S("1"), SV(""));
58     test(S(), SV("1"));
59     test(S("1"), SV("2"));
60     test(S("1"), SV("2"));
61 
62     test(S(),
63          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
64     test(S("123456789"),
65          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
66     test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
67          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
68     test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
69            "1234567890123456789012345678901234567890123456789012345678901234567890"),
70          SV("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"));
71     }
72 #endif
73 }
74