<?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>::/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#to_object2">::/2</a></code></h2> <hr /> <h4>Description</h4> <blockquote> <pre> Object::Predicate (Object1, Object2, ...)::Predicate (Object1; Object2; ...)::Predicate Object::(Predicate1, Predicate2, ...) Object::(Predicate1; Predicate2; ...) </pre> <p> Sends a message to an object. The message argument must match a public predicate of the receiver object. We can also send the same message to a set of objects or a set of messages to the same object. The "<code>,</code>" and "<code>;</code>" in the list have the usual Prolog meaning. </p> </blockquote> <h4>Template and modes</h4> <blockquote> <pre> +receivers::+messages </pre> </blockquote> <h4>Errors</h4> <blockquote> <dl> <dt>Either Object or Predicate is a variable:</dt> <dd><code>instantiation_error</code></dd> <dt>Predicate is declared private:</dt> <dd><code>permission_error(access, private_predicate, Predicate)</code></dd> <dt>Predicate is declared protected:</dt> <dd><code>permission_error(access, protected_predicate, Predicate)</code></dd> <dt>Predicate is not declared:</dt> <dd><code>existence_error(predicate_declaration, Predicate)</code></dd> <dt>Object does not exist:</dt> <dd><code>existence_error(object, Object)</code></dd> </dl> </blockquote> <h4>Examples</h4> <blockquote> <pre> | ?- list::member(X, [1, 2, 3]). </pre> </blockquote> <hr /> <p class="center"> <strong><a href="../methods/after3.html">Previous</a> | <a href="to_self1.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>