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<head><title>ASSERT-EVENT.html -- ACL2 Version 3.1</title></head>
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<h2>ASSERT-EVENT</h2>assert that a given form returns a non-<code>nil</code> value
<pre>Major Section: <a href="EVENTS.html">EVENTS</a>
</pre><p>
<pre>
Examples:
(assert-event (equal (+ 3 4) 7))
(assert-event (equal (+ 3 4) 7) :on-skip-proofs t)
<p>
General Forms:
(assert-event form)
(assert-event form :on-skip-proofs t)
</pre>
<p>
<code>Assert-event</code> takes a ground form, i.e., one with no free variables;
<code><a href="STOBJ.html">stobj</a></code>s are allowed but only a single non-<code><a href="STOBJ.html">stobj</a></code> value can be
returned. The form is then evaluated and if the result is <code>nil</code>, then a
so-called hard error (see <a href="ER.html">er</a>) results. This evaluation is however not done
if proofs are being skipped, as during <code><a href="INCLUDE-BOOK.html">include-book</a></code> (also
see <a href="SKIP-PROOFS.html">skip-proofs</a> and see <a href="LD-SKIP-PROOFSP.html">ld-skip-proofsp</a>), unless <code>:on-skip-proofs t</code> is
supplied.<p>
This form may be put into a book to be certified (see <a href="BOOKS.html">books</a>), because
<code>assert-event</code> is a macro whose calls expand to calls of <code>value-triple</code>
(see <a href="EMBEDDED-EVENT-FORM.html">embedded-event-form</a>).
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