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
22TEST_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
37int main(int, char**) {
38 test();
39
40#if TEST_STD_VER > 17
41 static_assert(test());
42#endif
43
44 return 0;
45}
46

source code of libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/copy.pass.cpp