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); // 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>
test(const typename S::value_type * lhs,const S & rhs,bool x)21 TEST_CONSTEXPR_CXX20 void test(const typename S::value_type* lhs, const S& rhs, bool x) {
22 assert((lhs > rhs) == x);
23 }
24
25 template <class S>
test_string()26 TEST_CONSTEXPR_CXX20 void test_string() {
27 test("", S(""), false);
28 test("", S("abcde"), false);
29 test("", S("abcdefghij"), false);
30 test("", S("abcdefghijklmnopqrst"), false);
31 test("abcde", S(""), true);
32 test("abcde", S("abcde"), false);
33 test("abcde", S("abcdefghij"), false);
34 test("abcde", S("abcdefghijklmnopqrst"), false);
35 test("abcdefghij", S(""), true);
36 test("abcdefghij", S("abcde"), true);
37 test("abcdefghij", S("abcdefghij"), false);
38 test("abcdefghij", S("abcdefghijklmnopqrst"), false);
39 test("abcdefghijklmnopqrst", S(""), true);
40 test("abcdefghijklmnopqrst", S("abcde"), true);
41 test("abcdefghijklmnopqrst", S("abcdefghij"), true);
42 test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), false);
43 }
44
test()45 TEST_CONSTEXPR_CXX20 bool test() {
46 test_string<std::string>();
47 #if TEST_STD_VER >= 11
48 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
49 #endif
50
51 return true;
52 }
53
main(int,char **)54 int main(int, char**) {
55 test();
56 #if TEST_STD_VER > 17
57 static_assert(test());
58 #endif
59
60 return 0;
61 }
62