txlyre
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avram


			
				
					
						
						
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<title>Version - avram - a virtual machine code interpreter</title>
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<h5 class="subsubsection">2.7.7.1 Version</h5>

<p>A virtual code application with exactly the following definition
implements a function that returns a constant character string
regardless of its argument. 
<a name="index-g_t_0040code_007bversion_007d-280"></a>
<pre class="example">     version = ((nil,nil),((nil,nil),(nil,((nil,nil),nil))))
</pre>
   <p class="noindent">The character string encodes the version number of the installed
<code>avram</code> executable, for example <code>0.13.0</code>, using the standard
representation for characters.

   <p>Although such an application is useless by itself, the intended use for
this feature is to cope with the possibility that future versions of
<code>avram</code> may include enhancements. Ideally, the maintainer of
<code>avram</code> will update the version number when new enhancements are
added. Applications can then detect whether they are available in the
installed version by using this feature. If a needed enhancement is not
available, the application can either make allowances or at least
terminate gracefully.

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