e</code> trait (also in <code class="computeroutput">operations.hpp</code>).</p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">out_value</code></span></p></td>
<td><p>If provided, the ith process will receive the value <code class="computeroutput">op</code>(in_value[0], op(in_value[1], op(..., in_value[i]) ... )). For the array variant, <code class="computeroutput">out_values</code> contains a pointer to storage for the <code class="computeroutput">n</code> output values. The prefix