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From: dewarr@my-dejanews.com
Subject: Re: Software landmines (was: Why C++ is successful)
Date: 1998/09/07
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Date: 1998-09-07T00:00:00+00:00
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In article <35F3FF42.D1E163E0@elca-matrix.ch>,
  Mats.Weber@elca-matrix.ch wrote:
> John G. Volan wrote:
>
> > > declare
> > >    A : Integer renames Get_A (10);
> > >    B : Float renames Get_B (X);
> > >    C : Boolean renames Get_C (Y);
> > > begin
> > >    Op (A, B, C);
> > > end;
> >
> > I'm curious: Does this have the same effect as the above, i.e., are the
> > function calls forced into a sequential order?  Or is their evaluation
> > deferred until the aliases A, B, and C are actually used as parameters
> > to the Op call, in which case the aliased function calls get executed in
> > an undefined order?
>
> Yes, it has the same effect. Each function call is evaluated during the
> elaboration of the renames it appears in. You are in fact renaming the object
> that contains the function result. (See RM 3.3(10)).
>


I must say that I find the renaming of function calls
like this to be a confusing oddity. It seems much clearer
to me to use ordinary constant declarations. The two
seem completely equivalent!

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