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									< title > Logtalk entity directive: op/3< / title > 
							 
						 
					
						
							
								
									
										
										
										
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								< div  class = "top-left" > Logtalk reference manual< / div >   
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								< div  class = "top-right" > Entity directive: op/3< / div >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
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								< div  class = "navtop" > < a  href = "../../index.html" > contents< / a >  >  < a  href = "../index.html" > reference manual< / a >  >  < a  href = "../index.html#directives" > directives< / a > < / div >  
						 
					
						
							
								
									
										
										
										
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								< h2  id = "directives_op3"  class = "codenp" > op/3< / h2 >  
						 
					
						
							
								
									
										
										
										
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								< h4 > Description< / h4 >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								< pre > op(Precedence, Associativity, Operator)< / pre >  
						 
					
						
							
								
									
										
										
										
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								< p >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								Declares operators. Operators declared inside objects and categories have local scope. Global operators can be declared inside a source file by writing the respective directives before the entity opening directives.
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
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								< h4 > Template and modes< / h4 >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								< pre > op(+integer, +associativity, +atom_or_atom_list)< / pre >  
						 
					
						
							
								
									
										
										
										
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								< h4 > Examples< / h4 >  
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								
							 
						 
					
						
							
								
									
										
										
										
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								< pre > :- op(950, fx, +). 
						 
					
						
							
								
									
										
										
										
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								:- op(950, fx, ?).
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
								:- op(950, fx, @).
							 
						 
					
						
							
								
									
										
										
										
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								:- op(950, fx, -).< / pre > 
							 
						 
					
						
							
								
									
										
										
										
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										< span > Copyright ©  < a  href = "mailto:pmoura@logtalk.org" > Paulo Moura< / a >  —  < a  href = "http://logtalk.org" > Logtalk.org< / a > < / span > < br / > 	
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
										< span > Last updated on: October 26, 2006< / span > 
							 
						 
					
						
							
								
							 
							
								
							 
							
								 
							
							
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