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									< meta  http-equiv = "content-type"  content = "text/html; charset=iso-8859-1"  / > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< title > Logtalk built-in method: retractall/1< / title > 
							 
						 
					
						
							
								
									
										
										
										
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								< a  href = "../../index.html" > contents< / a >  >  < a  href = "../index.html" > reference manual< / a >  >  < a  href = "../index.html#methods" > built-in methods< / a > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
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								< h2 > < code > retractall/1< / code > < / h2 > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								< h4 > Description< / h4 > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< blockquote > 
							 
						 
					
						
							
								
									
										
										
										
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								< pre > retractall(Head)< / pre > 
							 
						 
					
						
							
								
									
										
										
										
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								< p > 
							 
						 
					
						
							
								
									
										
										
										
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									Retracts all matching predicates from an object.
							 
						 
					
						
							
								
									
										
										
										
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								< / p > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< / blockquote > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< h4 > Template and modes< / h4 > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< blockquote > 
							 
						 
					
						
							
								
									
										
										
										
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								< pre > retractall(+callable)< / pre > 
							 
						 
					
						
							
								
									
										
										
										
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								< / blockquote > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								< h4 > Errors< / h4 > 
							 
						 
					
						
							
								
									
										
										
										
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								< blockquote > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< dl > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > Head is a variable:< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > instantiation_error< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > Head is neither a variable nor a callable term:< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > type_error(callable, Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > The predicate indicator of Head is that of a private predicate:< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > permission_error(modify, private_predicate, Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > The predicate indicator of Head is that of a protected predicate:< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > permission_error(modify, protected_predicate, Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > The predicate indicator of Head is that of a static predicate:< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > permission_error(modify, static_predicate, Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > The predicate indicator of Head is not declared:< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > existence_error(predicate_declaration, Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< / dl > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< / blockquote > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< h4 > Examples< / h4 > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< blockquote > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< dl > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > To retract all matching predicate definitions in < a  class = "glossary"  title = "Go to glossary definition"  href = "../../glossary.html#this" > this< / a > :< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > retractall(Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > To retract all matching public or protected predicate definitions in < a  class = "glossary"  title = "Go to glossary definition"  href = "../../glossary.html#self" > self< / a > :< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > ::retractall(Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
									< dt > To retract all matching public predicate definitions in an object:< / dt > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
										< dd > < code > Object::retractall(Head)< / code > < / dd > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< / dl > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								< / blockquote > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								< a  href = "retract1.html" > previous< / a >  | < a  href = "../../glossary.html" > glossary< / a >  | < a  href = "bagof3.html" > next< / a > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
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								Copyright ©  < a  href = "mailto:pmoura@logtalk.org" > Paulo Moura< / a >  —  < a  href = "http://www.logtalk.org" > Logtalk.org< / a > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							 
							
							
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