emicolon (;).</p>

<a name="label_part"></a>
<h5>2.5.1 Labels and locations for symbols</h5>
<p>Each symbol on the right hand side can optionally be labeled with a name.
Label names appear after the symbol name separated by a colon (:).  Label
names must be unique within the production, and can be used within action
code to refer to the value of the symbol.  Along with the label, two
more variables are created, which are the label plus <tt>left</tt> and
the label plus <tt>right</tt>.  These are <tt>int</tt>