/2006/n1986.pdf</a>)
limits somewhat the quality of interface this library can provide
for defining parameter-enabled constructors.  The usual workaround
for a lack of constructor delegation applies: one must factor the
common logic into a base class.</p>
<p>Let's build a parameter-enabled constructor that simply prints its
arguments.  The first step is to write a base class whose
constructor accepts a single argument known as an <a class="reference external" href="reference.html#argumentpack"><span class="