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From: "J-P. Rosen" <rosen@adalog.fr>
Newsgroups: comp.lang.ada
Subject: Re: GNAT GPL is not shareware
Date: Wed, 14 Jan 2015 18:45:59 +0100
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Date: 2015-01-14T18:45:59+01:00
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Le 14/01/2015 17:22, Robert A Duff a écrit :

> The annoying thing to me is that the compiler has already done that
> "quite painful" work, so you're duplicating work.
Sure. The "where to put the limit" question.

> An example:  ASIS has a query "Has_Limited", which tells you whether a
> given piece of syntax (e.g type declaration) has the keyword "limited".
> But it doesn't have an "Is_Limited" function that tells you whether
> a given subtype is limited.  The ASIS client can implement that
> (and I'm guessing you have such a thing and many more in your
> Thick_Queries), but it probably takes at least 50 lines of code.
Hmm.... I have that query, it's 168 lines of code.
I remember Tuck being frightened when I told him, he said "and to say we
have a bit for that in the compiler"... Hence the (failed) attempt to
define a higher layer of abstraction.

>> * TBH, I should mention a big hole: dispatching calls, where something
>> is clearly missing.
> 
> I think I remember something about that, but I've forgotten the
> details.  What is missing?
Since you can't statically know what subprogram is being called,
Corresponding_Called_Entity returns Nil_Element in place of the
subprogram declaration. But without a declaration, you cannot know the
formal parameters (so no information about the modes, whether some
parameters are defaulted, etc.)

We need a Corresponding_Called_Root_Entity... I think Serguei added
something like that.
-- 
J-P. Rosen
Adalog
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