<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="content-type" content="application/xml+xhtml; charset=utf-8" /> <title>Logtalk predicate directive: public/1</title> <link rel="stylesheet" href="../../screen.css" type="text/css" media="screen"/> <link rel="stylesheet" href="../../print.css" type="text/css" media="print"/> </head> <body> <div class="top-left">Logtalk reference manual</div> <div class="top-right">Predicate directive: public/1</div> <div class="bottom-left"><span class="page"/></div> <div class="bottom-right"><span class="page"/></div> <div class="navtop"><a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#directives">directives</a></div> <h2 id="directives_public1" class="codenp">public/1</h2> <h4>Description</h4> <pre>public(Functor/Arity) public(Functor1/Arity1, Functor2/Arity2, ...) public([Functor1/Arity1, Functor2/Arity2, ...]) public(Functor//Arity) public(Functor1//Arity1, Functor2//Arity2, ...) public([Functor1//Arity1, Functor2//Arity2, ...])</pre> <p> Declares public predicates and public grammar rule non-terminals. A public predicate can be called from any object. A public non-terminal can be used as an argument in <a title="Consult reference manual" href="../methods/phrase2.html"><code>phrase/2</code></a> and <a title="Consult reference manual" href="../methods/phrase3.html"><code>phrase/3</code></a> messages sent from any object. </p> <h4>Template and modes</h4> <pre>public(+predicate_indicator_term) public(+non_terminal_indicator_term)</pre> <h4>Examples</h4> <pre>:- public(ancestor/1). :- public(instance/1, instances/1). :- public([leaf/1, leaves/1]).</pre> <div class="footer"> <div class="copyright"> <span>Copyright © <a href="mailto:pmoura@logtalk.org">Paulo Moura</a> — <a href="http://logtalk.org">Logtalk.org</a></span><br/> <span>Last updated on: October 26, 2006</span> </div> <div class="navbottom"> <span><a href="protected1.html">previous</a> | <a href="../../glossary.html">glossary</a> | <a href="uses2.html">next</a></span><br/> <span><a href="http://validator.w3.org/check/referer">XHTML</a> + <a href="http://jigsaw.w3.org/css-validator/check/referer">CSS</a></span> </div> </div> </body> </html>