:</span><span class="identifier">type</span><span class="special">());</span>
      <span class="special">}</span>
      <span class="comment">// The actual forwarding function (using default policy to control precision).</span>
      <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span> <span class="keyword">inline</span>  <span class="identifier">T</span> <span class="identifier">pi</span