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Class Helper (Delphi and Delphi Prism Cross Reference Guide)

By Mike Prestwood

Delphi versus Delphi Prism: A side by side comparison between Delphi and Delphi Prism.

 
OOP Details
 

More object oriented (OO) stuff.

Class Helper

[Other Languages] 

A. In Dephi, class helpers allow you to extend a class without using inheritance. With a class helper, you do not have to create and use a new class descending from a class but instead you enhance the class directly and continue using it as you always have (even just with the DCU).

B. In general terms, developers sometimes use the term to refer to any class that helps out another class.

Delphi:  "Class Helpers" class helper for

Delphi allows you to extend an existing class without using inheritance. Buggy in 2005 and not officially supported but stable, usable, and officially supported in 2006 and above.

You declare a class helper similiar to how you declare a class but use the keywords class helper for.

Syntax Example:
TCyborg = class(TObject)
public
  FCyborgName: String;
end;
  
TCyborgHelper = class helper for TCyborg
  procedure ShowClassName;
end;
Delphi Prism:  "Class Helpers" Not Supported

Although Delphi for .Net did support class helpers starting with Delphi 8, its replacement (Prism) does not, at least not yet.














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