test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char8_t/to_char_type.pass.cpp

   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 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
  10
  11 // <string>
  12
  13 // template<> struct char_traits<char8_t>
  14
  15 // static constexpr char_type to_char_type(int_type c);
  16
  17 #include <string>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21
  22 int main()
  23 {
  24 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
  25     assert(std::char_traits<char8_t>::to_char_type(u8'a') == u8'a');
  26     assert(std::char_traits<char8_t>::to_char_type(u8'A') == u8'A');
  27     assert(std::char_traits<char8_t>::to_char_type(0) == 0);
  28 #endif
  29 }