/SPAN> comment_char_;
    <SPAN CLASS="keyword"><SPAN CLASS="keyword">bool</SPAN></SPAN> skip_;
};

} } } <SPAN CLASS="comment">// End namespace boost::iostreams:example</SPAN></PRE>

<P>
    When a <A HREF="../guide/filtering_streams.html">filtering stream or stream buffer</A> containing a <A HREF="../concepts/closable.html">Closable</A> <A HREF="../concepts/dual_use_filter.html">Dual-Use Filter</A> is closed, the Filter's member function <CODE>close</CODE> is called with one of the values <CODE>std::ios_b