typedefs.pass.cpp (1339B)
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 // Test for the existence of: 13 14 // basic_string typedef names 15 // typedef basic_string<char> string; 16 // typedef basic_string<char16_t> u16string; 17 // typedef basic_string<char8_t> u8string; // C++20 18 // typedef basic_string<char32_t> u32string; 19 // typedef basic_string<wchar_t> wstring; 20 21 #include <string> 22 #include <type_traits> 23 24 #include "test_macros.h" 25 26 int main() 27 { 28 static_assert((std::is_same<std::string, std::basic_string<char> >::value), ""); 29 static_assert((std::is_same<std::wstring, std::basic_string<wchar_t> >::value), ""); 30 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 31 static_assert((std::is_same<std::u8string, std::basic_string<char8_t> >::value), ""); 32 #endif 33 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 34 static_assert((std::is_same<std::u16string, std::basic_string<char16_t> >::value), ""); 35 static_assert((std::is_same<std::u32string, std::basic_string<char32_t> >::value), ""); 36 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 37 }