al">::</span><span class="identifier">karma</span><span class="special">::</span><span class="identifier">double_</span><span class="special">;</span>
</pre>
<p>
          </p>
<p>
            Simple usage of <code class="computeroutput"><span class="identifier">as</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;</span></code>,
            <code class="computeroutput"><span class="identifier">as_string</span></code> and <code class="computeroutput"><span cla