="number">3</span> <span class="number">5</span> <span class="number">8</span> <span class="number">13</span> <span class="number">21</span> <span class="number">34</span> <span class="number">55</span>
</pre>
<p>
        In this example an <span class="emphasis"><em>asymmetric_coroutine&lt;&gt;::pull_type</em></span>
        is created in the main execution context taking a lambda function (== <span class="emphasis"><em>coroutine-function</em></span>)
        which calculates Fibonacci numbers in a simple 