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<wchar_t>
12
13// static char_type* copy(char_type* s1, const char_type* s2, size_t n);
14
15// UNSUPPORTED: no-wide-characters
16
17#include <string>
18#include <cassert>
19
20#include "test_macros.h"
21
22TEST_CONSTEXPR_CXX20 bool test() {
23 wchar_t s1[] = {1, 2, 3};
24 wchar_t s2[3] = {0};
25 assert(std::char_traits<wchar_t>::copy(s2, s1, 3) == s2);
26 assert(s2[0] == wchar_t(1));
27 assert(s2[1] == wchar_t(2));
28 assert(s2[2] == wchar_t(3));
29 assert(std::char_traits<wchar_t>::copy(NULL, s1, 0) == NULL);
30 assert(std::char_traits<wchar_t>::copy(s1, NULL, 0) == s1);
31
32 return true;
33}
34
35int main(int, char**) {
36 test();
37
38#if TEST_STD_VER > 17
39 static_assert(test());
40#endif
41
42 return 0;
43}
44

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