wstreambuf
A specialization of basic_streambuf that uses wchar_t as the template parameters.
typedef basic_streambuf<wchar_t, char_traits<wchar_t> > wstreambuf;
Remarks
The type is a synonym for the template class basic_streambuf, specialized for elements of type wchar_t with default character traits.
Requirements
Header: <streambuf>
Namespace: std