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From: bourguet@my-dejanews.com
Subject: Re: Can't export object of private type
Date: 1999/03/01
Message-ID: <7be2pt$bfd$1@nnrp1.dejanews.com>#1/1
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Date: 1999-03-01T00:00:00+00:00
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In article <7bagrq$l6c$1@nnrp1.dejanews.com>,
  dewar@gnat.com wrote:
> In article <7b6f9k$at2$1@nnrp1.dejanews.com>,
>   bourguet@my-dejanews.com wrote:
> > Well, this is a feature I'd like, especially if the
> > compilation of a unit "withing" the package can be
> > compiled (and code generated)
> > without the private part. More or less like inter package
> > inline
> > is currently handled by gnat: you have a performance gain
> > if you accept
> > the dependancy but you may prefer the flexibility of the
> > independancy...
> > well I'd even accept that all the program have to be
> > compiled with the
> > same mode.
>
> Interesting idea. Of course you cannot generate code
> without the private part present (or at least not in any
> reasonably efficient or practical manner).

What I was thinking for the "don't use knowledge about private
parts" mode of code generation would be the equivalent of:

type X is private;

...

private
   type X_Decl;
   type X_Access is access X_Decl;
   type X is new Ada.Finalization.Controlled with record
      Value: X_Access;
   end record;

I know some people working in C++ who advice to always use the
equivalent.

Yours,

-- Jean-Marc

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