Detecting implementations of CDR specifications...

[Antoniotti Marco]

Following up on Erik's and keeping track of Alessio's.

Yes.  There isn't a CDR specifying "how" to use packages.  I have one in mind, but it is bound to be CONTROVERSIAL.  So I have not written it upon CDR form.  Plus that depends on "fixing the reader errors" (another CDR).

The note regarding packages in the proposed CDR just wants to be cautionary.  I think the proposed CDR is not the place where to hash out this problem.

All the best

Marco



On Jun 10, 2013, at 23:52 , Alessio Stalla <alessiostalla at gmail.com<mailto:alessiostalla at gmail.com>> wrote:

Well, it really depends on the CDR; some of them may define a precise API in a specific package and/or don't allow multiple implementations to coexist (e.g. the MOP). Perhaps it would be better to remove any reference to the package system altogether and simply state that some CDRs might be provided by multiple coexisting implementations, and, in those cases, it is not specified how to select one of them.


On Mon, Jun 10, 2013 at 10:38 PM, Erik Huelsmann <ehuels at gmail.com<mailto:ehuels at gmail.com>> wrote:
Hi Marco,


Reading the CDR, I wonder: in paragraph 2.1.2 the authors refer to the packaging system as a means to allow co-existing multiple implementations of a CDR in one image. However, the CDR doesn't specify or even advise CDR writers to use packages nor in what way. It seems to me this CDR allows one to detect that a CDR is available in the current image, but it doesn't say *where* the programmer can find it. It feels a bit partial. Is that intended?


Regards,


Erik.






On Mon, Jun 10, 2013 at 2:27 PM, Antoniotti Marco <antoniotti.marco at disco.unimib.it> wrote:
Dear all,

following up the CDR discussion that took place aside the European Lisp Symposium in Madrid a week ago, I prepared this document that specifies how a CL environment can test for the "presence" of a given CDR.

I wanted to pass it around before submitting it formally to the CDR editors.

all the best

Marco



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