scription</H4>

<P>Verifies that the given data is preserved when it is passed first through a given <A HREF='../concepts/output_filter.html'>OutputFilter</A> and then through a given <A HREF='../concepts/input_filter.html'>InputFilter</A>.</P>

<H4>Synopsis</H4>

<PRE CLASS="broken_ie"><SPAN CLASS="keyword">namespace</SPAN> boost { <SPAN CLASS="keyword">namespace</SPAN> iostreams {

<SPAN CLASS='keyword'>template</SPAN>&lt;<SPAN CLASS='keyword'>typename</SPAN> OutputFilter, <SPAN CLASS='keyword'>typename</