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 // XFAIL: LIBCXX-AIX-FIXME
10 
11 // <string>
12 
13 // template<class charT, class traits, class Allocator>
14 //   bool operator<(const basic_string<charT,traits,Allocator>& lhs, const charT* rhs); // constexpr since C++20
15 
16 #include <string>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 #include "min_allocator.h"
21 
22 template <class S>
23 TEST_CONSTEXPR_CXX20 void
24 test(const S& lhs, const typename S::value_type* rhs, bool x)
25 {
26     assert((lhs < rhs) == x);
27 }
28 
29 TEST_CONSTEXPR_CXX20 bool test() {
30   {
31     typedef std::string S;
32     test(S(""), "", false);
33     test(S(""), "abcde", true);
34     test(S(""), "abcdefghij", true);
35     test(S(""), "abcdefghijklmnopqrst", true);
36     test(S("abcde"), "", false);
37     test(S("abcde"), "abcde", false);
38     test(S("abcde"), "abcdefghij", true);
39     test(S("abcde"), "abcdefghijklmnopqrst", true);
40     test(S("abcdefghij"), "", false);
41     test(S("abcdefghij"), "abcde", false);
42     test(S("abcdefghij"), "abcdefghij", false);
43     test(S("abcdefghij"), "abcdefghijklmnopqrst", true);
44     test(S("abcdefghijklmnopqrst"), "", false);
45     test(S("abcdefghijklmnopqrst"), "abcde", false);
46     test(S("abcdefghijklmnopqrst"), "abcdefghij", false);
47     test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", false);
48   }
49 #if TEST_STD_VER >= 11
50   {
51     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
52     test(S(""), "", false);
53     test(S(""), "abcde", true);
54     test(S(""), "abcdefghij", true);
55     test(S(""), "abcdefghijklmnopqrst", true);
56     test(S("abcde"), "", false);
57     test(S("abcde"), "abcde", false);
58     test(S("abcde"), "abcdefghij", true);
59     test(S("abcde"), "abcdefghijklmnopqrst", true);
60     test(S("abcdefghij"), "", false);
61     test(S("abcdefghij"), "abcde", false);
62     test(S("abcdefghij"), "abcdefghij", false);
63     test(S("abcdefghij"), "abcdefghijklmnopqrst", true);
64     test(S("abcdefghijklmnopqrst"), "", false);
65     test(S("abcdefghijklmnopqrst"), "abcde", false);
66     test(S("abcdefghijklmnopqrst"), "abcdefghij", false);
67     test(S("abcdefghijklmnopqrst"), "abcdefghijklmnopqrst", false);
68   }
69 #endif
70 
71   return true;
72 }
73 
74 int main(int, char**)
75 {
76   test();
77 #if TEST_STD_VER > 17
78   static_assert(test());
79 #endif
80 
81   return 0;
82 }
83