fier">int_</span><span class="special">&lt;</span><span class="identifier">N</span><span class="special">&gt;))</span>
<span class="special">{</span>
   <span class="identifier">BOOST_MATH_STD_USING</span>
   <span class="keyword">return</span> <span class="identifier">pi</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">,</span> <span class="identifier">policies</span><span class="special">::</span><span class="identifier">policy</span><span class="special">&lt;<