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<char32_t>
12 
13 // static void assign(char_type& c1, const char_type& c2);
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   char32_t c = U'1';
24   std::char_traits<char32_t>::assign(c, U'a');
25   return c == U'a';
26 }
27 #endif
28 
main(int,char **)29 int main(int, char**) {
30 #if TEST_STD_VER >= 11
31   char32_t c = U'\0';
32   std::char_traits<char32_t>::assign(c, U'a');
33   assert(c == U'a');
34 #endif
35 
36 #if TEST_STD_VER > 14
37   static_assert(test_constexpr(), "");
38 #endif
39 
40   return 0;
41 }
42