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 // UNSUPPORTED: c++03, c++11, c++14, c++17
10
11 // <string>
12
13 // template<> struct char_traits<char8_t>
14
15 // static char_type* copy(char_type* s1, const char_type* s2, size_t n);
16
17 #include <string>
18 #include <cassert>
19
20 #include "test_macros.h"
21
test()22 TEST_CONSTEXPR_CXX20 bool test() {
23 #ifndef TEST_HAS_NO_CHAR8_T
24 char8_t s1[] = {1, 2, 3};
25 char8_t s2[3] = {0};
26 assert(std::char_traits<char8_t>::copy(s2, s1, 3) == s2);
27 assert(s2[0] == char8_t(1));
28 assert(s2[1] == char8_t(2));
29 assert(s2[2] == char8_t(3));
30 assert(std::char_traits<char8_t>::copy(NULL, s1, 0) == NULL);
31 assert(std::char_traits<char8_t>::copy(s1, NULL, 0) == s1);
32 #endif
33
34 return true;
35 }
36
main(int,char **)37 int main(int, char**) {
38 test();
39
40 #if TEST_STD_VER > 17
41 static_assert(test());
42 #endif
43
44 return 0;
45 }
46