1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <istream>
10
11// template <class charT, class traits = char_traits<charT> >
12// class basic_iostream :
13// public basic_istream<charT,traits>,
14// public basic_ostream<charT,traits>
15// {
16// public:
17// // types:
18// typedef charT char_type;
19// typedef traits traits_type;
20// typedef typename traits_type::int_type int_type;
21// typedef typename traits_type::pos_type pos_type;
22// typedef typename traits_type::off_type off_type;
23
24#include <istream>
25#include <type_traits>
26
27#include "test_macros.h"
28
29int main(int, char**)
30{
31 static_assert((std::is_base_of<std::basic_istream<char>, std::basic_iostream<char> >::value), "");
32 static_assert((std::is_base_of<std::basic_ostream<char>, std::basic_iostream<char> >::value), "");
33 static_assert((std::is_same<std::basic_iostream<char>::char_type, char>::value), "");
34 static_assert((std::is_same<std::basic_iostream<char>::traits_type, std::char_traits<char> >::value), "");
35 static_assert((std::is_same<std::basic_iostream<char>::int_type, std::char_traits<char>::int_type>::value), "");
36 static_assert((std::is_same<std::basic_iostream<char>::pos_type, std::char_traits<char>::pos_type>::value), "");
37 static_assert((std::is_same<std::basic_iostream<char>::off_type, std::char_traits<char>::off_type>::value), "");
38
39 return 0;
40}
41

source code of libcxx/test/std/input.output/iostream.format/input.streams/iostreamclass/types.pass.cpp