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 constexpr void assign(char_type& c1, const char_type& c2); // constexpr in C++17
14 // constexpr in C++17
15 
16 #include <string>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 #if TEST_STD_VER > 14
test_constexpr()22 constexpr bool test_constexpr() {
23   char c = '1';
24   std::char_traits<char>::assign(c, 'a');
25   return c == 'a';
26 }
27 #endif
28 
main(int,char **)29 int main(int, char**) {
30   char c = '\0';
31   std::char_traits<char>::assign(c, 'a');
32   assert(c == 'a');
33 
34 #if TEST_STD_VER > 14
35   static_assert(test_constexpr(), "");
36 #endif
37 
38   return 0;
39 }
40