quote>
Evaluates <i>body</i> with <i>var</i> bound to a new compressor
created as
with <tt>(apply&nbsp;#'make-instance&nbsp;class&nbsp;initargs)</tt>.
<a href='#finish-compression'><tt>FINISH-COMPRESSION</tt></a>
is implicitly called on the compressor at the end of evaluation.
</blockquote>


<a name='sect-customizing-compressors'><h4>Customizing Compressors</h4></a>

<p>Compressor objects follow a protocol that makes it easy to create
  specialized data formats. The ZLIB data format is essentially the
  sa