an class="pre">y</span></tt>.</td>
</tr>
</tbody>
</table>
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<pre class="literal-block">
typedef op&lt;<em>x</em><sub>1</sub>,<em>x</em><sub>2</sub>,... <em>x</em><sub>n</sub>&gt;::type r;
</pre>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Semantics:</th><td class="field-body"><tt class="literal