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Re: Discovering all sub-classes via introspection? [message #171510 is a reply to message #171509]

Fri, 07 January 2011 03:40

Jerry Stuckle
Messages: 2598
Registered: September 2010

Karma:

Senior Member

On 1/6/2011 10:38 PM, Roy Smith wrote:
> Given a class, is there a way to find all the classes which extend it?

No. There is no way to know if ANY class extends it, unless the class
has been instantiated.

A basic concept of OO programming - derived classes know about the base
class, but base classes don't know anything about derived classes.

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[Message index]

		Discovering all sub-classes via introspection? By: Roy Smith on Fri, 07 January 2011 03:38
		Re: Discovering all sub-classes via introspection? By: Jerry Stuckle on Fri, 07 January 2011 03:40
		Re: Discovering all sub-classes via introspection? By: Sherm Pendley on Fri, 07 January 2011 04:08
		Re: Discovering all sub-classes via introspection? By: Jerry Stuckle on Fri, 07 January 2011 13:15
		Re: Discovering all sub-classes via introspection? By: RMP on Sat, 08 January 2011 14:57
		Re: Discovering all sub-classes via introspection? By: Jerry Stuckle on Sat, 08 January 2011 16:34
		Re: Discovering all sub-classes via introspection? By: Robert Hairgrove on Sat, 08 January 2011 18:02

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