D>A mode tag <I>convertible to the <A HREF="modes.html">mode</A> of T</I>. This parameter is principally for internal use. Specifying a <A HREF="modes.html#mode_tags">mode tag</A> properly refined by the mode of T can prevent an unneeded buffer from being allocated in some cases. Defaults to the mode of T.</TD>
    </TR>
</TABLE>

<H4><CODE>stream::stream</CODE></H4>

<A NAME="stream_default_constructor"></A>
<PRE>    <B>stream</B>();</PRE>
    
<P>
    Constructs a <CODE>stream</CODE> with no associated in