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 // operator=(const charT* s); // constexpr since C++20
13
14 #include <string>
15 #include <cassert>
16
17 #include "test_macros.h"
18 #include "min_allocator.h"
19
20 template <class S>
21 TEST_CONSTEXPR_CXX20 void
test(S s1,const typename S::value_type * s2)22 test(S s1, const typename S::value_type* s2)
23 {
24 typedef typename S::traits_type T;
25 s1 = s2;
26 LIBCPP_ASSERT(s1.__invariants());
27 assert(s1.size() == T::length(s2));
28 assert(T::compare(s1.data(), s2, s1.size()) == 0);
29 assert(s1.capacity() >= s1.size());
30 }
31
test()32 TEST_CONSTEXPR_CXX20 bool test() {
33 {
34 typedef std::string S;
35 test(S(), "");
36 test(S("1"), "");
37 test(S(), "1");
38 test(S("1"), "2");
39 test(S("1"), "2");
40
41 test(S(),
42 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
43 test(S("123456789"),
44 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
45 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
46 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
47 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
48 "1234567890123456789012345678901234567890123456789012345678901234567890"),
49 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
50 }
51 #if TEST_STD_VER >= 11
52 {
53 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
54 test(S(), "");
55 test(S("1"), "");
56 test(S(), "1");
57 test(S("1"), "2");
58 test(S("1"), "2");
59
60 test(S(),
61 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
62 test(S("123456789"),
63 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
64 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"),
65 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
66 test(S("1234567890123456789012345678901234567890123456789012345678901234567890"
67 "1234567890123456789012345678901234567890123456789012345678901234567890"),
68 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
69 }
70 #endif
71
72 return true;
73 }
74
main(int,char **)75 int main(int, char**)
76 {
77 test();
78 #if TEST_STD_VER > 17
79 static_assert(test());
80 #endif
81
82 return 0;
83 }
84