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Home | Program structure : Object orientation

Type	Name	Summary

Directive	Abstract	Defines a class method only implemented in subclasses
Keyword	As	Used for casting object references
Keyword	Class	Starts the declaration of a type of object class
Keyword	Constructor	Defines the method used to create an object from a class
Keyword	Destructor	Defines the method used to destroy an object
Directive	Dynamic	Allows a class method to be overriden in derived classes
Procedure	FreeAndNil	Free memory for an object and set it to nil
Directive	Index	Principally defines indexed class data properties
Keyword	Inherited	Used to call the parent class constructor or destructor method
Keyword	Interface	Used for Unit external definitions, and as a Class skeleton
Keyword	Is	Tests whether an object is a certain class or ascendant
Keyword	Object	Allows a subroutine data type to refer to an object method
Directive	Overload	Allows 2 or more routines to have the same name
Directive	Override	Defines a method that replaces a virtual parent class method
Function	Printer	Returns a reference to the global Printer object
Directive	Private	Starts the section of private data and methods in a class
Keyword	Property	Defines controlled access to class fields
Directive	Protected	Starts a section of class private data accesible to sub-classes
Directive	Public	Starts an externally accessible section of a class
Directive	Published	Starts a published externally accessible section of a class
Variable	Self	Hidden parameter to a method - refers to the containing object
Type	TObject	The base class type that is ancestor to all other classes
Directive	Virtual	Allows a class method to be overriden in derived classes

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