//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17

// <string>

// template<> struct char_traits<char8_t>

// typedef char8_t       char_type;
// typedef unsigned int   int_type;
// typedef streamoff      off_type;
// typedef u16streampos   pos_type;
// typedef mbstate_t      state_type;

#include <string>
#include <type_traits>
#include <cstdint>

int main(int, char**)
{
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
    static_assert((std::is_same<std::char_traits<char8_t>::char_type,  char8_t>::value), "");
    static_assert((std::is_same<std::char_traits<char8_t>::int_type,   unsigned int>::value), "");
    static_assert((std::is_same<std::char_traits<char8_t>::off_type,   std::streamoff>::value), "");
    static_assert((std::is_same<std::char_traits<char8_t>::pos_type,   std::u16streampos>::value), "");
    static_assert((std::is_same<std::char_traits<char8_t>::state_type, std::mbstate_t>::value), "");
#endif

  return 0;
}