tifier">double_</span><span class="special">;</span>
    <span class="keyword">using</span> <span class="identifier">spirit</span><span class="special">::</span><span class="identifier">qi</span><span class="special">::</span><span class="identifier">eol</span><span class="special">;</span>

    <span class="identifier">std</span><span class="special">::</span><span class="identifier">ifstream</span> <span class="identifier">in</span><span class="special">(</span><span class="string">"multi_pass.txt"</span>