ntifier">a</span><span class="special">;</span>
        <span class="keyword">int</span> <span class="identifier">b</span><span class="special">;</span> <span class="comment">// b is the output</span>
    <span class="special">};</span>

    <span class="identifier">fibonacci_dataset</span><span class="special">()</span>             <span class="special">{}</span>

    <span class="comment">// size is infinite</span>
    <span class="identifier">bdata</span><span class="special">::</span><span class="identi