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,
13 //                  const basic_string<charT,traits,Allocator>& rhs); // constexpr since C++20
14 
15 #include <string>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 #include "min_allocator.h"
20 
21 template <class S>
22 TEST_CONSTEXPR_CXX20 void test(const S& lhs, const S& rhs, bool x) {
23   assert((lhs > rhs) == x);
24 }
25 
26 TEST_CONSTEXPR_CXX20 bool test() {
27   {
28     typedef std::string S;
29     test(S(""), S(""), false);
30     test(S(""), S("abcde"), false);
31     test(S(""), S("abcdefghij"), false);
32     test(S(""), S("abcdefghijklmnopqrst"), false);
33     test(S("abcde"), S(""), true);
34     test(S("abcde"), S("abcde"), false);
35     test(S("abcde"), S("abcdefghij"), false);
36     test(S("abcde"), S("abcdefghijklmnopqrst"), false);
37     test(S("abcdefghij"), S(""), true);
38     test(S("abcdefghij"), S("abcde"), true);
39     test(S("abcdefghij"), S("abcdefghij"), false);
40     test(S("abcdefghij"), S("abcdefghijklmnopqrst"), false);
41     test(S("abcdefghijklmnopqrst"), S(""), true);
42     test(S("abcdefghijklmnopqrst"), S("abcde"), true);
43     test(S("abcdefghijklmnopqrst"), S("abcdefghij"), true);
44     test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), false);
45   }
46 #if TEST_STD_VER >= 11
47   {
48     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
49     test(S(""), S(""), false);
50     test(S(""), S("abcde"), false);
51     test(S(""), S("abcdefghij"), false);
52     test(S(""), S("abcdefghijklmnopqrst"), false);
53     test(S("abcde"), S(""), true);
54     test(S("abcde"), S("abcde"), false);
55     test(S("abcde"), S("abcdefghij"), false);
56     test(S("abcde"), S("abcdefghijklmnopqrst"), false);
57     test(S("abcdefghij"), S(""), true);
58     test(S("abcdefghij"), S("abcde"), true);
59     test(S("abcdefghij"), S("abcdefghij"), false);
60     test(S("abcdefghij"), S("abcdefghijklmnopqrst"), false);
61     test(S("abcdefghijklmnopqrst"), S(""), true);
62     test(S("abcdefghijklmnopqrst"), S("abcde"), true);
63     test(S("abcdefghijklmnopqrst"), S("abcdefghij"), true);
64     test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), false);
65   }
66 #endif
67 
68   return true;
69 }
70 
71 int main(int, char**) {
72   test();
73 #if TEST_STD_VER > 17
74   static_assert(test());
75 #endif
76 
77   return 0;
78 }
79