
    </p>
<pre class="programlisting"><span class="comment">// Preprocessed pi constant, annotated.</span>

<span class="keyword">namespace</span> <span class="identifier">boost</span>
<span class="special">{</span>
  <span class="keyword">namespace</span> <span class="identifier">math</span>
  <span class="special">{</span>
    <span class="keyword">namespace</span> <span class="identifier">constants</span>
    <span class="special">{</span>
      <span class="keyword">namespace</span> <span class="identif