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        <TD VALIGN="top"><I>Alloc</I></TD><TD WIDTH="2em" VALIGN="top">-</TD>
        <TD>A C++ standard library allocator type (<A CLASS="bib_ref" href="../bibliography.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>
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    <TR>
        <TD VALIGN="top"><I>Mode</I></TD><TD WIDTH="2em" VALIGN="top">-</TD>
        <T