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 {
24     char c = '1';
25     std::char_traits<char>::assign(c, 'a');
26     return c == 'a';
27 }
28 #endif
29 
main(int,char **)30 int main(int, char**)
31 {
32     char c = '\0';
33     std::char_traits<char>::assign(c, 'a');
34     assert(c == 'a');
35 
36 #if TEST_STD_VER > 14
37     static_assert(test_constexpr(), "" );
38 #endif
39 
40   return 0;
41 }
42