hangeable can also be defined by <B>defclass</B>.
In the following example,
class <TT>intvec5</TT> which has five integer elements is defined.
Automatic type check and conversion are performed when the elements are
accessed by the interpreter.
When compiled with proper declaration, faster accessing code is produced.

<P>
<PRE>
(defclass intvec5 :super vector :element-type :integer :size 5)
(setq x (instantiate intvec5))  --&gt; #i(0 0 0 0 0)
</PRE>

<P>
When a message is sent to an object, 
the correspondin