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<head><title>ACL2-PC_colon__colon_ILLEGAL.html -- ACL2 Version 3.1</title></head>
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<h3>ACL2-PC::ILLEGAL</h3>(macro)
<code> </code>illegal instruction
<pre>Major Section: <a href="PROOF-CHECKER-COMMANDS.html">PROOF-CHECKER-COMMANDS</a>
</pre><p>
<pre>
Example:
(illegal -3)
<p>
General Form:
(illegal instruction)
</pre>
Probably not of interest to most users; always ``fails'' since it
expands to the <code>fail</code> command.<p>
The <code>illegal</code> command is used mainly in the implementation. For
example, the instruction <code>0</code> is ``read'' as <code>(illegal 0)</code>, since <code>dive</code>
expects positive integers.
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