1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <string> 11 12 // template<> struct char_traits<char16_t> 13 14 // static void assign(char_type& c1, const char_type& c2); 15 // constexpr in C++17 16 17 #include <string> 18 #include <cassert> 19 20 #include "test_macros.h" 21 22 #if TEST_STD_VER > 14 test_constexpr()23 constexpr bool test_constexpr() 24 { 25 char16_t c = u'1'; 26 std::char_traits<char16_t>::assign(c, u'a'); 27 return c == u'a'; 28 } 29 #endif 30 main()31 int main() 32 { 33 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 34 #if TEST_STD_VER >= 11 35 char16_t c = u'\0'; 36 std::char_traits<char16_t>::assign(c, u'a'); 37 assert(c == u'a'); 38 #endif 39 40 #if TEST_STD_VER > 14 41 static_assert(test_constexpr(), "" ); 42 #endif 43 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 44 } 45