iography.html#iso">[ISO]</A>, 20.1.5), used to allocate any required character buffers. Defaults to <CODE>std::allocator&lt;Ch&gt;</CODE>, where <CODE>Ch</CODE> is the <A HREF="traits.html#char_type">character type</A> of T.</TD>
    </TR>
    <TR>
        <TD VALIGN="top"><I>Mode</I></TD><TD WIDTH="2em" VALIGN="top">-</TD>
        <TD>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<