1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <string>
11
12 // template<> struct char_traits<char32_t>
13
14 // static int compare(const char_type* s1, const char_type* s2, size_t n);
15 // constexpr in C++17
16
17 #include <string>
18 #include <cassert>
19
20 #include "test_macros.h"
21
22 #if TEST_STD_VER > 14
test_constexpr()23 constexpr bool test_constexpr()
24 {
25 return std::char_traits<char32_t>::compare(U"123", U"223", 3) < 0
26 && std::char_traits<char32_t>::compare(U"223", U"123", 3) > 0
27 && std::char_traits<char32_t>::compare(U"123", U"123", 3) == 0;
28 }
29 #endif
30
main()31 int main()
32 {
33 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
34 #if TEST_STD_VER >= 11
35 assert(std::char_traits<char32_t>::compare(U"", U"", 0) == 0);
36 assert(std::char_traits<char32_t>::compare(NULL, NULL, 0) == 0);
37
38 assert(std::char_traits<char32_t>::compare(U"1", U"1", 1) == 0);
39 assert(std::char_traits<char32_t>::compare(U"1", U"2", 1) < 0);
40 assert(std::char_traits<char32_t>::compare(U"2", U"1", 1) > 0);
41
42 assert(std::char_traits<char32_t>::compare(U"12", U"12", 2) == 0);
43 assert(std::char_traits<char32_t>::compare(U"12", U"13", 2) < 0);
44 assert(std::char_traits<char32_t>::compare(U"12", U"22", 2) < 0);
45 assert(std::char_traits<char32_t>::compare(U"13", U"12", 2) > 0);
46 assert(std::char_traits<char32_t>::compare(U"22", U"12", 2) > 0);
47
48 assert(std::char_traits<char32_t>::compare(U"123", U"123", 3) == 0);
49 assert(std::char_traits<char32_t>::compare(U"123", U"223", 3) < 0);
50 assert(std::char_traits<char32_t>::compare(U"123", U"133", 3) < 0);
51 assert(std::char_traits<char32_t>::compare(U"123", U"124", 3) < 0);
52 assert(std::char_traits<char32_t>::compare(U"223", U"123", 3) > 0);
53 assert(std::char_traits<char32_t>::compare(U"133", U"123", 3) > 0);
54 assert(std::char_traits<char32_t>::compare(U"124", U"123", 3) > 0);
55 #endif
56
57 #if TEST_STD_VER > 14
58 static_assert(test_constexpr(), "" );
59 #endif
60 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS
61 }
62