Bug#494404: patch + comments on cl-geodesics

[Luca Capello]

Hi Peter!

On Tue, 26 Aug 2008 22:36:11 +0200, Peter De Wachter wrote:
> On Tue, 26 Aug 2008 01:08:53 +0200
> Luca Capello <luca at pca.it> wrote:
>> > - utilities.lisp doesn't have an IN-PACKAGE form, so it gets loaded
>> > in whatever random package happens to be active.
>> 
>> Since it's loaded by all the three subsystems, I'd say it's correct.
>
> Well, consider this transcript:
[...]
> Utilities.lisp clobbers variables and functions in whatever package the
> user happened to be in, that can't be right. And re-loading the
> geodesics fasls won't work if that :foo package no longer exists.

OK, now I understood what you meant, fixed [1].

>> I guess the idea was to having to load only one system instead of
>> three. It can also be possible to split geodesics.asd in three
>> different files, one for each subsystem, still providing the old
>> geodesics.asd which loads the three.
>
> But those three systems define functions with the exact same names:
> 	geodesics:a
> 	geodesics:da/dt
> 	geodesics:adash
> 	geodesics:n
> 	geodesics:dn/dt
> 	geodesics:ndash
> If you load GD-STATIC-UNEQUAL after GD-STATIC-EQUAL, you'll redefine
> GD-STATIC-EQUAL's functions. If you next load GD-COSMOLOGICAL, you'll
> just redefine them again. A system that loads more than one of these
> three is nonsensical.

I committed the split [2], but I kept geodesics.asd for backward
compatibility.  However, we still have only one package, GEODESICS:
should each system define their own package?

Thx, bye,
Gismo / Luca

Footnotes: 
[1] http://git.debian.org/?p=pkg-common-lisp/cl-geodesics.git;a=commitdiff;h=09db012a40ac704ad6b54b8b7c3047e89caa7123
[2] http://git.debian.org/?p=pkg-common-lisp/cl-geodesics.git;a=commitdiff;h=8915755ac6b198502312789a11c4d335e50064c1
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