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<char16_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
20TEST_CONSTEXPR_CXX20 bool test() {
21 char16_t s1[] = {1, 2, 3};
22 char16_t s2[3] = {0};
23 assert(std::char_traits<char16_t>::copy(s2, s1, 3) == s2);
24 assert(s2[0] == char16_t(1));
25 assert(s2[1] == char16_t(2));
26 assert(s2[2] == char16_t(3));
27 assert(std::char_traits<char16_t>::copy(NULL, s1, 0) == NULL);
28 assert(std::char_traits<char16_t>::copy(s1, NULL, 0) == s1);
29
30 return true;
31}
32
33int main(int, char**) {
34 test();
35
36#if TEST_STD_VER > 17
37 static_assert(test());
38#endif
39
40 return 0;
41}
42

source code of libcxx/test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/copy.pass.cpp