<!doctype html public "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>forall/2</title> <link rel=stylesheet href="../../styles.css" type="text/css"> </head> <body> <hr /> <h2><code><a class="back" title="Return to index" href="../index.html#forall2">forall/2</a></code></h2> <hr /> <h4>Description</h4> <blockquote> <pre> forall(Generator, Test) </pre> <p> This predicate is true if, for all solutions of Generator, Test is true (some Prolog compilers already define this or a similar predicate). </p> </blockquote> <h4>Template and modes</h4> <blockquote> <pre> forall(+callable, +callable) </pre> </blockquote> <h4>Errors</h4> <blockquote> <dl> <dt>Generator is not a callable term:</dt> <dd><code>type_error(callable, Generator)</code></dd> <dt>Test is not a callable term:</dt> <dd><code>type_error(callable, Test)</code></dd> </dl> </blockquote> <h4>Examples</h4> <blockquote> <pre> | ?- forall(member(X, [1, 2, 3]), write(X)). </pre> </blockquote> <hr /> <p class="center"> <strong><a href="set_logtalk_flag2.html">Previous</a> | <a href="logtalk_version3.html">Next</a> | <a href="../index.html">Table of Contents</a> | <a href="../../bibliography.html">Bibliography</a> | <a href="../../glossary.html">Glossary</a></strong> </p> <p class="center"> Last updated on: February 9, 2002 </p> <hr /> </body> </html>