pan> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">constants</span><span class="special">::</span><span class="identifier">two_pi</span><span class="special">&lt;</span><span class="keyword">double</span><span class="special">&gt;()</span> <span class="special">*</span> <span class="identifier">dist</span><span class="special">(</span><span class="identifier">gen</span><span class="special">);</