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* assign(char_type* s, size_t n, char_type a);
14 
15 // UNSUPPORTED: no-wide-characters
16 
17 #include <string>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
test()22 TEST_CONSTEXPR_CXX20 bool test() {
23   wchar_t s2[3] = {0};
24   assert(std::char_traits<wchar_t>::assign(s2, 3, wchar_t(5)) == s2);
25   assert(s2[0] == wchar_t(5));
26   assert(s2[1] == wchar_t(5));
27   assert(s2[2] == wchar_t(5));
28   assert(std::char_traits<wchar_t>::assign(NULL, 0, wchar_t(5)) == NULL);
29 
30   return true;
31 }
32 
main(int,char **)33 int main(int, char**) {
34   test();
35 
36 #if TEST_STD_VER > 17
37   static_assert(test());
38 #endif
39 
40   return 0;
41 }
42