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 #include <string> 16 #include <cassert> 17 18 #include "test_macros.h" 19 test()20TEST_CONSTEXPR_CXX20 bool test() 21 { 22 wchar_t s2[3] = {0}; 23 assert(std::char_traits<wchar_t>::assign(s2, 3, wchar_t(5)) == s2); 24 assert(s2[0] == wchar_t(5)); 25 assert(s2[1] == wchar_t(5)); 26 assert(s2[2] == wchar_t(5)); 27 assert(std::char_traits<wchar_t>::assign(NULL, 0, wchar_t(5)) == NULL); 28 29 return true; 30 } 31 main(int,char **)32int main(int, char**) 33 { 34 test(); 35 36 #if TEST_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED) 37 static_assert(test()); 38 #endif 39 40 return 0; 41 } 42