PAN> OutputFilter, <SPAN CLASS='keyword'>typename</SPAN> Source1, <SPAN CLASS='keyword'>typename</SPAN> Source2&gt;
<SPAN CLASS='keyword'>bool</SPAN> test_output_filter( OutputFilter filter, 
                         <SPAN CLASS='keyword'>const</SPAN> Source1&amp; input,
                         <SPAN CLASS='keyword'>const</SPAN> Source2&amp; output );

} } <SPAN CLASS='comment'>// End namespace boost::io</SPAN></PRE>

<A NAME="test_pair"></A>
<H3>Function template <CODE>test_filter_pair</CODE></H3>

<H4>De