/A>(<SPAN CLASS='keyword'>const</SPAN> chain&);

    std::streamsize <A CLASS='documented' HREF='#read'>read</A>(char_type* s, std::streamsize n);
    std::streamsize <A CLASS='documented' HREF='#write'>write</A>(<SPAN CLASS='keyword'>const</SPAN> char_type* s, std::streamsize n);
    <A CLASS='documented' HREF='../functions/positioning.html#synopsis'>stream_offset</A> <A CLASS='documented' HREF='#seek'>seek</A>(<A CLASS='documented' HREF='../functions/positioning.html#synopsis'>stream_offset</A> off, std::