Home / Class Definition Reference / Class Keywords / Final

Class Definition Reference
Previous section           Next section
InterSystems: The power behind what matters   

Specifies whether this class is final (cannot have subclasses).
To specify that a class is final, use the following syntax:
Class MyApp.Exam As %Persistent [ Final ]  { //class members }
Otherwise, omit this keyword or place the word Not immediately before the keyword.
If a class is final, it cannot have subclasses.
Also, if a class is final, the class compiler may take advantage of certain code generation optimizations (related to the fact that instances of a final class cannot be used polymorphically).
If you omit this keyword, the class definition is not final.
See Also

Previous section           Next section
View this book as PDF   |  Download all PDFs
Copyright © 1997-2019 InterSystems Corporation, Cambridge, MA
Content Date/Time: 2019-04-19 08:40:24