="keyword">const</SPAN>] U1&amp; u1, <SPAN CLASS="keyword">const</SPAN> U2&amp; u2);

        <SPAN CLASS="omitted">...</SPAN>

    template&lt;<SPAN CLASS="keyword">typename</SPAN> U1, <SPAN CLASS="omitted">...</SPAN>, <SPAN CLASS="keyword">typename</SPAN> UN&gt;
    <SPAN CLASS="keyword">void</SPAN> <B>open</B>([<SPAN CLASS="keyword">const</SPAN>] U1&amp; u1, <SPAN CLASS="keyword">const</SPAN> U2&amp; u2, <SPAN CLASS="omitted">...</SPAN>, <SPAN CLASS="keyword">const</SPAN> UN&amp; uN);</PRE>

<P>
    Each