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 // template<class charT, class traits, class Allocator>
12 // bool operator!=(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs); // 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(const S & lhs,const typename S::value_type * rhs,bool x)22 test(const S& lhs, const typename S::value_type* rhs, bool x)
23 {
24 assert((lhs != rhs) == x);
25 }
26
test()27 TEST_CONSTEXPR_CXX20 bool test() {
28 {
29 typedef std::string S;
30 test(S(""), "", false);
31 test(S(""), "abcde", true);
32 test(S(""), "abcdefghij", true);
33 test(S(""), "abcdefghijklmnopqrst", true);
34 test(S("abcde"), "", true);
35 test(S("abcde"), "abcde", false);
36 test(S("abcde"), "abcdefghij", true);
37 test(S("abcde"), "abcdefghijklmnopqrst", true);
38 test(S("abcdefghij"), "", true);
39 test(S("abcdefghij"), "abcde", true);
40 test(S("abcdefghij"), "abcdefghij", false);
41 test(S("abcdefghij"), "abcdefghijklmnopqrst", true);
42 test(S("abcdefghijklmnopqrst"), "", true);
43 test(S("abcdefghijklmnopqrst"), "abcde", true);
44 test(S("abcdefghijklmnopqrst"), "abcdefghij", true);
45 test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", false);
46 }
47 #if TEST_STD_VER >= 11
48 {
49 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
50 test(S(""), "", false);
51 test(S(""), "abcde", true);
52 test(S(""), "abcdefghij", true);
53 test(S(""), "abcdefghijklmnopqrst", true);
54 test(S("abcde"), "", true);
55 test(S("abcde"), "abcde", false);
56 test(S("abcde"), "abcdefghij", true);
57 test(S("abcde"), "abcdefghijklmnopqrst", true);
58 test(S("abcdefghij"), "", true);
59 test(S("abcdefghij"), "abcde", true);
60 test(S("abcdefghij"), "abcdefghij", false);
61 test(S("abcdefghij"), "abcdefghijklmnopqrst", true);
62 test(S("abcdefghijklmnopqrst"), "", true);
63 test(S("abcdefghijklmnopqrst"), "abcde", true);
64 test(S("abcdefghijklmnopqrst"), "abcdefghij", true);
65 test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", false);
66 }
67 #endif
68
69 return true;
70 }
71
main(int,char **)72 int main(int, char**)
73 {
74 test();
75 #if TEST_STD_VER > 17
76 static_assert(test());
77 #endif
78
79 return 0;
80 }
81