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63 lines
2.1 KiB
HTML
63 lines
2.1 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="content-type" content="application/xml+xhtml; charset=utf-8" />
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<title>Logtalk built-in predicate: forall/2</title>
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<link rel="stylesheet" href="../../screen.css" type="text/css" media="screen"/>
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<link rel="stylesheet" href="../../print.css" type="text/css" media="print"/>
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</head>
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<body>
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<div class="top-left">Logtalk reference manual</div>
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<div class="top-right">Built-in predicate: forall/2</div>
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<div class="bottom-left"><span class="page"/></div>
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<div class="bottom-right"><span class="page"/></div>
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<div class="navtop"><a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#builtins">built-in predicates</a></div>
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<h2 class="code">forall/2</h2>
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<h4>Description</h4>
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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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<h4>Template and modes</h4>
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<pre>forall(+callable, +callable)</pre>
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<h4>Errors</h4>
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<dl class="errors">
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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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<h4>Examples</h4>
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<pre>| ?- forall(member(X, [1, 2, 3]), write(X)).
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123
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yes</pre>
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<div class="footer">
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<div class="navbottom"><a href="../index.html#builtins">previous</a> | <a href="../../glossary.html">glossary</a> | <a href="retractall1.html">next</a></div>
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<div class="copyright">Copyright © <a href="mailto:pmoura@logtalk.org">Paulo Moura</a> — <a href="http://www.logtalk.org">Logtalk.org</a></div>
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<div class="footnote">
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<span class="validators"><a href="http://validator.w3.org/check/referer">XHTML</a> + <a href="http://jigsaw.w3.org/css-validator/check/referer">CSS</a></span>
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<span class="date">Last updated on: November 16, 2005</span>
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