Re: meaning of "current instance"

["Matthew Heaney" <matthew_heaney@acm.org>]

In article <zaoX3.10259$dp.270354@typhoon-sf.snfc21.pbi.net> , 
tmoran@bix.com  wrote:

>   Is there anything you can do with "current instance" that couldn't
> be done (and perhaps more safely) with Initialize on a Controlled type?
> I grant that ":=T'access;" is simpler, but it could be done with
> Initialize.


My original motivation for using

  type RT is
    tagged limited record
      I : Integer := Init (RT'Access);
    end record;

instead of

  type RT is
    new Limited_Controlled with record
      I : Integer;
    end record;

  procedure Initialize (O : in out RT);


was precisely to avoid having to use a controlled type.  Controlled
types are in general less efficient than non-controlled types.


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