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From: Victor Porton <porton@narod.ru>
Newsgroups: comp.lang.ada
Subject: Re: Trouble with "operation can be dispatching in only one type"
Date: Wed, 13 Aug 2014 22:44:06 +0300
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Date: 2014-08-13T22:44:06+03:00
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Victor Porton wrote:

> I defined two tagged types T1 and T2 in some package.
> 
> I need a function in the same package:
> 
> not overriding function F (Stack: T1) return T2;
> 
> The compiler complaints:
> 
> operation can be dispatching in only one type
> 
> My current workaround is to define it instead as:
> 
> not overriding function F (Stack: T1'Class) return T2;
> 
> But this is a hack. Can I define this function in the right way? (I want
> it to be dispatching only in T1, not T2.)

package Bad is

   type T1 is tagged null record;
   type T2 is tagged null record;

   not overriding function F (Stack: T1) return T2;
   
end Bad;

-- 
Victor Porton - http://portonvictor.org