test/std/strings/char.traits/char.traits.specializations/char.traits.specializations.char16_t/types.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// <string>

// template<> struct char_traits<char16_t>

// typedef char16_t       char_type;
// typedef uint_least16_t int_type;
// typedef streamoff      off_type;
// typedef u16streampos   pos_type;
// typedef mbstate_t      state_type;
// using comparison_category = strong_ordering;

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

#include "test_macros.h"

int main(int, char**)
{
    static_assert((std::is_same<std::char_traits<char16_t>::char_type, char16_t>::value), "");
    static_assert((std::is_same<std::char_traits<char16_t>::int_type, std::uint_least16_t>::value), "");
    static_assert((std::is_same<std::char_traits<char16_t>::off_type, std::streamoff>::value), "");
    static_assert((std::is_same<std::char_traits<char16_t>::pos_type, std::u16streampos>::value), "");
    static_assert((std::is_same<std::char_traits<char16_t>::state_type, std::mbstate_t>::value), "");
#if TEST_STD_VER > 17
    static_assert(std::is_same_v<std::char_traits<char16_t>::comparison_category, std::strong_ordering>);
#endif

    return 0;
}