2002-08-01 00:34:42 +01:00
<?xml version="1.0" encoding="iso-8859-1"?>
<?xml-stylesheet type="text/css" href="../../styles.css" ?>
2001-06-06 21:07:01 +01:00
2002-08-01 00:34:42 +01:00
< !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" >
2001-06-06 21:07:01 +01:00
< head >
< title > clause/2< / title >
2002-08-01 00:34:42 +01:00
< link rel = "stylesheet" href = "../../styles.css" type = "text/css" >
2001-06-06 21:07:01 +01:00
< / head >
< body >
< hr / >
< h2 > < code > < a class = "back" title = "Return to index" href = "../index.html#clause2" > clause/2< / a > < / code > < / h2 >
< hr / >
< h4 > Description< / h4 >
< blockquote >
< pre >
clause(Head, Body)
< / pre >
< p >
2002-04-03 14:26:59 +01:00
Enumerates, by backtracking, the clauses of an object's dynamic predicates.
2001-06-06 21:07:01 +01:00
< / p >
< / blockquote >
< h4 > Template and modes< / h4 >
< blockquote >
< pre >
2002-04-03 14:26:59 +01:00
clause(+callable, ?body)
2001-06-06 21:07:01 +01:00
< / pre >
< / blockquote >
2001-12-05 23:57:48 +00:00
< h4 > Errors< / h4 >
2001-06-06 21:07:01 +01:00
< blockquote >
< dl >
< dt > Head is a variable:< / dt >
< dd > < code > instantiation_error< / code > < / dd >
< dt > Head is a neither a variable nor a callable term:< / dt >
< dd > < code > type_error(callable, Head)< / code > < / dd >
< dt > Body is a neither a variable nor a callable term:< / dt >
< dd > < code > type_error(callable, Body)< / code > < / dd >
< dt > The predicate indicator of Head is that of a private predicate:< / dt >
< dd > < code > permission_error(access, private_predicate, Head)< / code > < / dd >
< dt > The predicate indicator of Head is that of a protected predicate:< / dt >
< dd > < code > permission_error(access, protected_predicate, Head)< / code > < / dd >
< dt > The predicate indicator of Head is that of a static predicate:< / dt >
< dd > < code > permission_error(access, static_predicate, Head)< / code > < / dd >
< dt > Head is not a declared predicate:< / dt >
< dd > < code > existence_error(predicate_declaration, Head)< / code > < / dd >
< / dl >
< / blockquote >
< h4 > Examples< / h4 >
< blockquote >
< dl >
< dt > To retrieve a matching clause of any dynamic predicate in < a class = "glossary" title = "Go to glossary definition" href = "../../glossary.html#this" > this< / a > :< / dt >
< dd > < code > clause(Head, Body)< / code > < / dd >
< dt > To retrieve a matching clause of a public or protected dynamic predicate in < a class = "glossary" title = "Go to glossary definition" href = "../../glossary.html#self" > self< / a > :< / dt >
< dd > < code > ::clause(Head, Body)< / code > < / dd >
< dt > To retrieve a matching clause of a public dynamic predicate in an object:< / dt >
< dd > < code > Object::clause(Head, Body)< / code > < / dd >
< / dl >
< / blockquote >
< hr / >
< p class = "center" >
< strong > < a href = "assertz1.html" > Previous< / a > | < a href = "retract1.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" >
2002-08-01 00:34:42 +01:00
Last updated on: July 29, 2002
2001-06-06 21:07:01 +01:00
< / p >
< hr / >
< / body >
< / html >
