<!doctype html public "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>predicate_property/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#predicate_property2">predicate_property/2</a></code></h2> <hr /> <h4>Description</h4> <blockquote> <pre> predicate_property(Predicate, Property) </pre> <p> Enumerates, by backtracking, the properties of a visible predicate. </p> </blockquote> <h4>Template and modes</h4> <blockquote> <pre> predicate_property(+callable, ?predicate_property) </pre> </blockquote> <h4>Errors</h4> <blockquote> <dl> <dt>Predicate is a variable:</dt> <dd><code>instantiation_error</code></dd> <dt>Predicate is neither a variable nor a callable term:</dt> <dd><code>type_error(callable, Predicate)</code></dd> <dt>Property is neither a variable nor a valid predicate property:</dt> <dd><code>domain_error(predicate_property, Property)</code></dd> </dl> </blockquote> <h4>Examples</h4> <blockquote> <dl> <dt>To enumerate, by backtracking, the properties of a predicate visible in <a class="glossary" title="Go to glossary definition" href="../../glossary.html#this">this</a>:</dt> <dd><code>predicate_property(foo(_), Property)</code></dd> <dt>To enumerate, by backtracking, the properties of a public or protected predicate visible in <a class="glossary" title="Go to glossary definition" href="../../glossary.html#self">self</a>:</dt> <dd><code>::predicate_property(foo(_), Property)</code></dd> <dt>To enumerate, by backtracking, the properties of a public predicate visible in an object:</dt> <dd><code>Object::predicate_property(foo(_), Property)</code></dd> </dl> </blockquote> <hr /> <p class="center"> <strong><a href="current_predicate1.html">Previous</a> | <a href="abolish1.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: October 21, 2001 </p> <hr /> </body> </html>