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<> struct char_traits<char32_t>
12
13 // static char_type* copy(char_type* s1, const char_type* s2, size_t n);
14
15 #include <string>
16 #include <cassert>
17
18 #include "test_macros.h"
19
test()20 TEST_CONSTEXPR_CXX20 bool test() {
21 char32_t s1[] = {1, 2, 3};
22 char32_t s2[3] = {0};
23 assert(std::char_traits<char32_t>::copy(s2, s1, 3) == s2);
24 assert(s2[0] == char32_t(1));
25 assert(s2[1] == char32_t(2));
26 assert(s2[2] == char32_t(3));
27 assert(std::char_traits<char32_t>::copy(NULL, s1, 0) == NULL);
28 assert(std::char_traits<char32_t>::copy(s1, NULL, 0) == s1);
29
30 return true;
31 }
32
main(int,char **)33 int main(int, char**) {
34 test();
35
36 #if TEST_STD_VER > 17
37 static_assert(test());
38 #endif
39
40 return 0;
41 }
42