test/std/input.output/iostream.format/input.streams/istream/types.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <istream>

// template <class charT, class traits = char_traits<charT> >
// class basic_istream
//     : virtual public basic_ios<charT,traits>
// {
// public:
//     // types (inherited from basic_ios (27.5.4)):
//     typedef charT                          char_type;
//     typedef traits                         traits_type;
//     typedef typename traits_type::int_type int_type;
//     typedef typename traits_type::pos_type pos_type;
//     typedef typename traits_type::off_type off_type;

#include <istream>
#include <type_traits>

int main()
{
    static_assert((std::is_base_of<std::basic_ios<char>, std::basic_istream<char> >::value), "");
    static_assert((std::is_same<std::basic_istream<char>::char_type, char>::value), "");
    static_assert((std::is_same<std::basic_istream<char>::traits_type, std::char_traits<char> >::value), "");
    static_assert((std::is_same<std::basic_istream<char>::int_type, std::char_traits<char>::int_type>::value), "");
    static_assert((std::is_same<std::basic_istream<char>::pos_type, std::char_traits<char>::pos_type>::value), "");
    static_assert((std::is_same<std::basic_istream<char>::off_type, std::char_traits<char>::off_type>::value), "");
}