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Subject: Re: Separate Compilation in Programming Languages
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From: Ray Blaak <rAYblaaK@STRIPCAPStelus.net>
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Date: Mon, 25 Feb 2008 22:16:01 GMT
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Ray Blaak <rAYblaaK@STRIPCAPStelus.net> writes:
> > Perhaps.  But I still don't see how one can defer the dependency of a
> > Java signature to the implementation of the Java class and prevent
> > the need for recompiling the entire architecture when the signature of
> > a parent class changes.   
> 
> Maybe the disconnect is here. Are you talking about how spec changes ripple
> down, or are you talking about how body changes ripple down? Spec changes
> affect clients and bodies, both in Java in Ada. Body (implementation) do not
> affect clients that only refer to the spec, both in Java and Ada.

It also occurs to me to wonder if you were assuming the Java interface and
implementation are in the same file. If so, the issues you say would indeed
happen. 

But usually the interface and its implementations are in separate files, as
per the usual Java rule of one class per file. That separation is what allows
Java to have separate compilation.

-- 
Cheers,                                        The Rhythm is around me,
                                               The Rhythm has control.
Ray Blaak                                      The Rhythm is inside me,
rAYblaaK@STRIPCAPStelus.net                    The Rhythm has my soul.