Class SymbolPtr

			
				
					
						
							
					
					
						
							   class  
							
								SymbolPtr
							
							 : public ObjectPtr  
						
					
				
				
					
						 Programmer: Ryan Davis  
					
				
			
			 
			
				Description: 
			
			
				 I provide an extension of ObjectPtr's services to
 include named accessors and utilities for Symbols.
 
			
			   
			
				Public Methods: 
			
			
				
					  
					
					static ObjectPtr  
					
						create 
					
					(const String & aValue); 
					

					  I am create. I act as a "factory method" for creating new symbol
 objects.
 
					

					

					   
					

					static SymbolPtr  
					
						convert 
					
					(const ObjectPtr & obj); 
					

					  I convert obj to a valid SymbolPtr or gNil if obj wasn't an symbol.
 
					

					

					   
					

					 
					
						SymbolPtr 
					
					(const ObjectPtr & pointee); 
					

					  This is the constructor. It has a default value of gNil, so it can
 be used as the generic constructor as well. This constructor
 creates a Object pointer that points to the address
 passed in through .
 
					

					

					   
					

					Boolean  
					
						operator== 
					
					(const ObjectPtr & aString); 
					

					  I return true if we point to the same object. I am necessary because
 the op== below hides my equivalent in the superclass.
 
					

					

					   
					

					Boolean  
					
						operator== 
					
					(const String & aString); 
					

					  I return true if the string data held by my object is equal to aString.
 
					

					

					   
					

					Boolean  
					
						operator== 
					
					(const SymbolPtr & aSymbol); 
					

					  I return true if the string data held by my object is equal to aString.
 
					

					

					   
					

					String  
					
						value 
					
					(); 
					

					  I am the String get accessor.
 
					

					

					   
					

					void  
					
						value 
					
					(const String & aValue); 
					

					  I am the String set accessor. In reality, because of Smalltalk's
 definition, I actually create a new String object to point to...
 i.e. I call create & set myself to point to the result of create..
 I am the method used to verify the validity of the methods
 in SymbolPtr.
 TESTING
 
					

					

					  
				
			
			  
			
				Protected Methods: 
			
			
				
					  
					
					friend void  
					
						genesis 
					
					(); 
					

					    
					

					

					   
					

					static ClassPtr &  
					
						klassPtr 
					
					(); 
					

					    
					

					

					   
					

					static UInteger  
					
						indexOf 
					
					(const String & symbol); 
					

					  returns i (good) or i>max (bad)
 
					

					

					   
					

					static void  
					
						add 
					
					(const SymbolPtr & symbol); 
					

					  UNIQUE_SYMBOLS
 
					

					

					  
				
			
			
				Protected Members: