n class="special">{</span>
<span class="keyword">namespace</span> <span class="identifier">math</span>
<span class="special">{</span>

<span class="keyword">template</span> <span class="special">&lt;</span> <span class="keyword">typename</span> <span class="identifier">IntegerType</span> <span class="special">&gt;</span>
   <span class="keyword">class</span> <span class="identifier">gcd_evaluator</span><span class="special">;</span>
<span class="keyword">template</span> <span class="special">&lt;</span> <sp