><span class="special">(</span><span class="keyword">const</span> <span class="identifier">T</span><span class="special">&amp;</span> <span class="identifier">v</span><span class="special">,</span> <span class="keyword">const</span> <span class="identifier">Policy</span><span class="special">&amp;);</span>
</pre>
<p>
          The trunc functions round their argument to the integer value, nearest
          to but no larger in magnitude than the argument.
        </p>
<p>
          For example <code class="c