#include <iterator>
#include <string>
#include <type_traits>
int main()
{
typedef std::istreambuf_iterator<char> I1;
static_assert((std::is_convertible<I1,
std::iterator<std::input_iterator_tag, char, std::char_traits<char>::off_type,
char*, char> >::value), "");
static_assert((std::is_same<I1::char_type, char>::value), "");
static_assert((std::is_same<I1::traits_type, std::char_traits<char> >::value), "");
static_assert((std::is_same<I1::int_type, I1::traits_type::int_type>::value), "");
static_assert((std::is_same<I1::streambuf_type, std::streambuf>::value), "");
static_assert((std::is_same<I1::istream_type, std::istream>::value), "");
typedef std::istreambuf_iterator<wchar_t> I2;
static_assert((std::is_convertible<I2,
std::iterator<std::input_iterator_tag, wchar_t, std::char_traits<wchar_t>::off_type,
wchar_t*, wchar_t> >::value), "");
static_assert((std::is_same<I2::char_type, wchar_t>::value), "");
static_assert((std::is_same<I2::traits_type, std::char_traits<wchar_t> >::value), "");
static_assert((std::is_same<I2::int_type, I2::traits_type::int_type>::value), "");
static_assert((std::is_same<I2::streambuf_type, std::wstreambuf>::value), "");
static_assert((std::is_same<I2::istream_type, std::wistream>::value), "");
}