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>
test(const S & lhs,const S & rhs,bool x)22 TEST_CONSTEXPR_CXX20 void test(const S& lhs, const S& rhs, bool x) {
23 assert((lhs == rhs) == x);
24 }
25
26 template <class S>
test_string()27 TEST_CONSTEXPR_CXX20 void test_string() {
28 test(S(""), S(""), true);
29 test(S(""), S("abcde"), false);
30 test(S(""), S("abcdefghij"), false);
31 test(S(""), S("abcdefghijklmnopqrst"), false);
32 test(S("abcde"), S(""), false);
33 test(S("abcde"), S("abcde"), true);
34 test(S("abcde"), S("abcdefghij"), false);
35 test(S("abcde"), S("abcdefghijklmnopqrst"), false);
36 test(S("abcdefghij"), S(""), false);
37 test(S("abcdefghij"), S("abcde"), false);
38 test(S("abcdefghij"), S("abcdefghij"), true);
39 test(S("abcdefghij"), S("abcdefghijklmnopqrst"), false);
40 test(S("abcdefghijklmnopqrst"), S(""), false);
41 test(S("abcdefghijklmnopqrst"), S("abcde"), false);
42 test(S("abcdefghijklmnopqrst"), S("abcdefghij"), false);
43 test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), true);
44 }
45
test()46 TEST_CONSTEXPR_CXX20 bool test() {
47 test_string<std::string>();
48 #if TEST_STD_VER >= 11
49 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
50 #endif
51
52 return true;
53 }
54
main(int,char **)55 int main(int, char**) {
56 test();
57 #if TEST_STD_VER > 17
58 static_assert(test());
59 #endif
60
61 return 0;
62 }
63