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<char>
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 {
22 char s1[] = {1, 2, 3};
23 char s2[3] = {0};
24 assert(std::char_traits<char>::copy(s2, s1, 3) == s2);
25 assert(s2[0] == char(1));
26 assert(s2[1] == char(2));
27 assert(s2[2] == char(3));
28 assert(std::char_traits<char>::copy(NULL, s1, 0) == NULL);
29 assert(std::char_traits<char>::copy(s1, NULL, 0) == s1);
30
31 return true;
32 }
33
main(int,char **)34 int main(int, char**)
35 {
36 test();
37
38 #if TEST_STD_VER > 17
39 static_assert(test());
40 #endif
41
42 return 0;
43 }
44