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 charT* lhs, const basic_string<charT,traits,Allocator>& rhs);
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
22 test(const typename S::value_type* lhs, const S& rhs, bool x)
23 {
24     assert((lhs < rhs) == x);
25 }
26 
27 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("abcde", S(""), false);
35     test("abcde", S("abcde"), false);
36     test("abcde", S("abcdefghij"), true);
37     test("abcde", S("abcdefghijklmnopqrst"), true);
38     test("abcdefghij", S(""), false);
39     test("abcdefghij", S("abcde"), false);
40     test("abcdefghij", S("abcdefghij"), false);
41     test("abcdefghij", S("abcdefghijklmnopqrst"), true);
42     test("abcdefghijklmnopqrst", S(""), false);
43     test("abcdefghijklmnopqrst", S("abcde"), false);
44     test("abcdefghijklmnopqrst", S("abcdefghij"), false);
45     test("abcdefghijklmnopqrst", S("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("abcde", S(""), false);
55     test("abcde", S("abcde"), false);
56     test("abcde", S("abcdefghij"), true);
57     test("abcde", S("abcdefghijklmnopqrst"), true);
58     test("abcdefghij", S(""), false);
59     test("abcdefghij", S("abcde"), false);
60     test("abcdefghij", S("abcdefghij"), false);
61     test("abcdefghij", S("abcdefghijklmnopqrst"), true);
62     test("abcdefghijklmnopqrst", S(""), false);
63     test("abcdefghijklmnopqrst", S("abcde"), false);
64     test("abcdefghijklmnopqrst", S("abcdefghij"), false);
65     test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), false);
66   }
67 #endif
68 
69   return true;
70 }
71 
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