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<head><title>ACL2-PC_colon__colon_REPLAY.html -- ACL2 Version 3.1</title></head>
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<h3>ACL2-PC::REPLAY</h3>(macro)
<code> </code>replay one or more instructions
<pre>Major Section: <a href="PROOF-CHECKER-COMMANDS.html">PROOF-CHECKER-COMMANDS</a>
</pre><p>
<pre>
Examples:
REPLAY -- replay all instructions in the current session
(i.e., state-stack)
(REPLAY 5) -- replay the most recent 5 instructions
(REPLAY 5
(COMMENT deleted dive command here))
-- replace the 5th most recent instruction with the
indicated comment instruction, and then replay it
followed by the remaining 4 instructions
<p>
General Form:
(REPLAY &OPTIONAL n replacement-instruction)
</pre>
Replay the last <code>n</code> instructions if <code>n</code> is a positive integer; else <code>n</code>
should be <code>nil</code> or not supplied, and replay all instructions.
However, if <code>replacement-instruction</code> is supplied and not <code>nil</code>, then
before the replay, replace the <code>nth</code> instruction (from the most
recent, as shown by <code>commands</code>) with <code>replacement-instruction</code>.<p>
If this command ``fails'', then the <code>restore</code> command will revert the
state-stack to its value present before the <code>replay</code> instruction was
executed.
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