Re: private types and >

Re: private types and >

[Gerd Moellmann]

kramer@suntan.eng.usf.edu (Todd Kramer (GE)) writes:

> I was wondering if anyone out there could help me. I'm trying to write a 
> generic package to implement a doubly linked circular list. I wanted to 
> mak it sort based one of the data fileds in the records I am using but I 
> can't get it to let me compare directly since that operation is normally 
> not allowed on private types. I have tried sing function key_of to return 
> a key and then "<". However, it will not recognize this as a valid 
> operator either which my book says it should. Is there another way to do 
> this under gnat that is maybe nonstandard or something? If any of you 
> know PLEASE email me or drop me a reply.
> 
> 
> 						thanks in advance
> 
> 							TK

Did you try something like this?

	generic
	   type Element_Type is private;
	   with function "<" (X, Y : in Element_Type) return Boolean is <>;
	package Sorted_List is
	   ...
	end Sorted_List;


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