n> (ischar(tail) &amp;&amp; strcmpi(tail, <span class="string">'reuse'</span>)),
0052         reuseMem = 1;
0053     <span class="keyword">elseif</span> (ischar(tail) &amp;&amp; strcmpi(tail, <span class="string">'safe'</span>)),
0054         useSafe = 1;
0055     <span class="keyword">elseif</span> (isa(tail, <span class="string">'double'</span>))
0056         Y = tail;   <span class="keyword">break</span>;    <span class="comment">% this should be the leftmost argument</span>
0057     <span class="keyword