an class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>

<span class="identifier">v</span> <span class="special">=</span> <span class="identifier">mpl</span><span class="special">::</span><span class="identifier">vector_c</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">,</span> <span class="number">456</span><span class="special">,</span> <span class="n