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* move(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 char16_t s1[] = {1, 2, 3};
22 assert(std::char_traits<char16_t>::move(s1, s1 + 1, 2) == s1);
23 assert(s1[0] == char16_t(2));
24 assert(s1[1] == char16_t(3));
25 assert(s1[2] == char16_t(3));
26 s1[2] = char16_t(0);
27 assert(std::char_traits<char16_t>::move(s1 + 1, s1, 2) == s1 + 1);
28 assert(s1[0] == char16_t(2));
29 assert(s1[1] == char16_t(2));
30 assert(s1[2] == char16_t(3));
31 assert(std::char_traits<char16_t>::move(NULL, s1, 0) == NULL);
32 assert(std::char_traits<char16_t>::move(s1, NULL, 0) == s1);
33
34 return true;
35 }
36
main(int,char **)37 int main(int, char**) {
38 test();
39
40 #if TEST_STD_VER > 17
41 static_assert(test());
42 #endif
43
44 return 0;
45 }
46