This repository has been archived on 2023-08-20. You can view files and clone it, but cannot push or open issues or pull requests.
yap-6.3/Logtalk/manuals/refman/builtins/extends_object2_3.html

78 lines
1.9 KiB
HTML
Raw Normal View History

<?xml version="1.0" encoding="iso-8859-1"?>
<?xml-stylesheet type="text/css" href="../../styles.css" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>extends_object/2-3</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#extends_object2_3">extends_object/2-3</a></code></h2>
<hr />
<h4>Description</h4>
<blockquote>
<pre>
extends_object(Prototype, Parent)
extends_object(Prototype, Parent, Scope)
</pre>
<p>
Enumerates, by backtracking, all pairs of objects such that the first one extends the second.
</p>
</blockquote>
<h4>Template and modes</h4>
<blockquote>
<pre>
extends_object(?object_identifier, ?object_identifier)
extends_object(?object_identifier, ?object_identifier, ?scope)
</pre>
</blockquote>
<h4>Errors</h4>
<blockquote>
<dl>
<dt>Prototype is neither a variable nor a valid object identifier:</dt>
<dd><code>type_error(object_identifier, Prototype)</code></dd>
<dt>Parent is neither a variable nor a valid object identifier:</dt>
<dd><code>type_error(object_identifier, Parent)</code></dd>
<dt>Scope is neither a variable nor a valid entity scope:</dt>
<dd><code>type_error(scope, Scope)</code></dd>
</dl>
</blockquote>
<h4>Examples</h4>
<blockquote>
<pre>
| ?- extends_object(Object, state_space).
| ?- extends_object(Object, list, public).
</pre>
</blockquote>
<hr />
<p class="center">
<strong><a href="abolish_protocol1.html">Previous</a> | <a href="extends_protocol2_3.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: August 6, 2002
</p>
<hr />
</body>
</html>