589793238462643383279502884e+00L</span><span class="special">;</span>
    <span class="special">}</span>
    <span class="keyword">namespace</span> <span class="identifier">constants</span><span class="special">{;</span>
    <span class="special">}</span> <span class="comment">// namespace constants</span>
  <span class="special">}</span> <span class="comment">// namespace math</span>
<span class="special">}</span> <span class="comment">// namespace boost</span>
</pre>
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