s="identifier">level</span> <span class="special">=</span> <span class="number">0</span><span class="special">;</span> <span class="identifier">level</span> <span class="special">&lt;</span> <span class="number">3</span><span class="special">;</span> <span class="special">++</span><span class="identifier">level</span><span class="special">)</span> <span class="special">{</span>
    <span class="identifier">processor</span><span class="special">.</span><span class="identifier">optimization_level</span><span 