txlyre
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avram


			
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<title>avram - a virtual machine code interpreter: 2.7.7.1 Version</title>

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<a name="Version"></a>
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<td valign="middle" align="left">[<a href="avram_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
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<td valign="middle" align="left">[<a href="avram_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
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<a name="Version-1"></a>
<h4 class="subsubsection">2.7.7.1 Version</h4>

<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-version"></a>
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">version = ((nil,nil),((nil,nil),(nil,((nil,nil),nil))))
</pre></td></tr></table>

<p>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>
<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.
</p>
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