 NIL)))
</code></pre> <p>Clip offers a couple of constructs to perform conditionals. These constructs are <code>C:WHEN</code> <code>C:UNLESS</code> and <code>C:IF</code>, after their CL equivalents. Each take an attribute called <code>TEST</code> that has to resolve to a non-NIL value to be taken as true. In the case of <code>C:IF</code>, three special local child tags are used: <code>C:THEN</code>, <code>C:ELSE</code> and <code>C:TEST</code>. The <code>C:TEST</code> tag can be used as an alternative to the