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 // UNSUPPORTED: clang-8
10 
11 // <string>
12 
13 // template<> struct char_traits<char>
14 
15 // static char_type* assign(char_type* s, size_t n, char_type a);
16 
17 #include <string>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
test()22 TEST_CONSTEXPR_CXX20 bool test()
23 {
24     char s2[3] = {0};
25     assert(std::char_traits<char>::assign(s2, 3, char(5)) == s2);
26     assert(s2[0] == char(5));
27     assert(s2[1] == char(5));
28     assert(s2[2] == char(5));
29     assert(std::char_traits<char>::assign(NULL, 0, char(5)) == NULL);
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