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* 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 {
22 char s1[] = {1, 2, 3};
23 assert(std::char_traits<char>::move(s1, s1+1, 2) == s1);
24 assert(s1[0] == char(2));
25 assert(s1[1] == char(3));
26 assert(s1[2] == char(3));
27 s1[2] = char(0);
28 assert(std::char_traits<char>::move(s1+1, s1, 2) == s1+1);
29 assert(s1[0] == char(2));
30 assert(s1[1] == char(2));
31 assert(s1[2] == char(3));
32 assert(std::char_traits<char>::move(NULL, s1, 0) == NULL);
33 assert(std::char_traits<char>::move(s1, NULL, 0) == s1);
34
35 return true;
36 }
37
main(int,char **)38 int main(int, char**)
39 {
40 test();
41
42 #if TEST_STD_VER > 17
43 static_assert(test());
44 #endif
45
46 return 0;
47 }
48