ak</span><span class="special">;</span>

    <span class="keyword">case</span> <span class="identifier">json</span><span class="special">::</span><span class="identifier">kind</span><span class="special">::</span><span class="identifier">double_</span><span class="special">:</span>
        <span class="identifier">os</span> <span class="special">&lt;&lt;</span> <span class="identifier">jv</span><span class="special">.</span><span class="identifier">get_double</span><span class="special">();</span>
        <