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69 lines
2.0 KiB
HTML
69 lines
2.0 KiB
HTML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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<head>
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<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
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<title>Logtalk built-in predicate: forall/2</title>
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<link rel="stylesheet" href="../../styles.css" type="text/css" />
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</head>
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<body>
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<div class="navtop">
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<a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#builtins">built-in predicates</a>
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</div>
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<h2><code>forall/2</code></h2>
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<h4>Description</h4>
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<blockquote>
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<pre>forall(Generator, Test)</pre>
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<p>
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This predicate is true if, for all solutions of Generator, Test is true (some Prolog compilers already define this or a similar predicate).
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</p>
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</blockquote>
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<h4>Template and modes</h4>
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<blockquote>
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<pre>forall(+callable, +callable)</pre>
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</blockquote>
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<h4>Errors</h4>
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<blockquote>
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<dl>
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<dt>Generator is not a callable term:</dt>
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<dd><code>type_error(callable, Generator)</code></dd>
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<dt>Test is not a callable term:</dt>
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<dd><code>type_error(callable, Test)</code></dd>
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</dl>
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</blockquote>
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<h4>Examples</h4>
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<blockquote>
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<pre>| ?- forall(member(X, [1, 2, 3]), write(X)).</pre>
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</blockquote>
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<div class="navbottom">
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<a href="set_logtalk_flag2.html">previous</a> | <a href="../../glossary.html">glossary</a> | <a href="retractall1.html">next</a>
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Copyright © <a href="mailto:pmoura@logtalk.org">Paulo Moura</a> — <a href="http://www.logtalk.org">Logtalk.org</a>
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