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<head><title>THE.html -- ACL2 Version 3.1</title></head>
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<h2>THE</h2>run-time type check
<pre>Major Section: <a href="PROGRAMMING.html">PROGRAMMING</a>
</pre><p>
<code>(The typ val)</code> checks that <code>val</code> satisfies the type specification
<code>typ</code> (see <a href="TYPE-SPEC.html">type-spec</a>). An error is caused if the check fails,
and otherwise, <code>val</code> is the value of this expression. Here are
some examples.
<pre>
(the integer 3) ; returns 3
(the (integer 0 6) 3) ; returns 3
(the (integer 0 6) 7) ; causes an error
</pre>
See <a href="TYPE-SPEC.html">type-spec</a> for a discussion of the legal type
specifications.
<p>
<code>The</code> is defined in Common Lisp. See any Common Lisp documentation
for more information.
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