<?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: private/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: private/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_private1" class="codenp">private/1</h2> <h4>Description</h4> <pre>private(Functor/Arity) private(Functor1/Arity1, Functor2/Arity2, ...) private([Functor1/Arity1, Functor2/Arity2, ...]) private(Functor//Arity) private(Functor1//Arity1, Functor2//Arity2, ...) private([Functor1//Arity1, Functor2//Arity2, ...])</pre> <p> Declares private predicates and private grammar rule non-terminals. A private predicate can only be called from the object containing the private directive. A private non-terminal can only be used in a call of the <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> methods from the object containing the private directive. </p> <h4>Template and modes</h4> <pre>private(+predicate_indicator_term) private(+non_terminal_indicator_term)</pre> <h4>Examples</h4> <pre>:- private(counter/1). :- private(init/1, free/1). :- private([data/3, key/1, keys/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="op3.html">previous</a> | <a href="../../glossary.html">glossary</a> | <a href="protected1.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>