Environment functions?


Hi

I am trying to figure out the status of CLtL2 Environment functions in  
LW 5.x.
My question is whether the various *-INFORMATION function can be  
trusted to work reasonably in accordance with CLtL2.
Also, somebody else before had noted that AUGMENT-ENVIRONMENT has  
disappeared from LW 5.x.   Does anybody know of a workaround?  I am  
trying to test some portable code walkers.

Cheers

--
Marco Antoniotti, Associate Professor				tel.	+39 - 02 64 48 79 01
DISCo, Università Milano Bicocca U14 2043
Viale Sarca 336
I-20126 Milan (MI) ITALY

Please note that I am not checking my Spam-box anymore.

Re: Environment functions?

Hi Marco,

I wonder if the Environments Access module might be a sort of end-run  
around the issue:

http://www.lispwire.com/entry-proganal-envaccess-des

My understanding is that this Environments Access module at one point  
compiled in all of the major lisps at the basic level, including  
Lispworks, and that it has also been ported to CMUCL at a deeper level  
(e.g. usage of the environments operators by the compiler). It would  
be cool if this open source project could be extended more deeply into  
Lispworks.

HTH,

On Dec 29, 2008, at 10:45 AM, Marco Antoniotti wrote:

>
>
> Hi
>
> I am trying to figure out the status of CLtL2 Environment functions  
> in LW 5.x.
> My question is whether the various *-INFORMATION function can be  
> trusted to work reasonably in accordance with CLtL2.
> Also, somebody else before had noted that AUGMENT-ENVIRONMENT has  
> disappeared from LW 5.x.   Does anybody know of a workaround?  I am  
> trying to test some portable code walkers.
>
> Cheers
>
> --
> Marco Antoniotti, Associate Professor				tel.	+39 - 02 64 48 79 01
> DISCo, Università Milano Bicocca U14 2043
> Viale Sarca 336
> I-20126 Milan (MI) ITALY
>
> Please note that I am not checking my Spam-box anymore.
>
>
>
>
>

--
Gary Warren King, metabang.com
Cell: (413) 559 8738
Fax: (206) 338-4052
gwkkwg on Skype * garethsan on AIM

Re: Environment functions?

On Wed, Dec 31, 2008 at 3:26 PM, Gary King <gwking@metabang.com> wrote:
> My understanding is that this Environments Access module at one point
> compiled in all of the major lisps at the basic level, including Lispworks,
> and that it has also been ported to CMUCL at a deeper level (e.g. usage of
> the environments operators by the compiler). It would be cool if this open
> source project could be extended more deeply into Lispworks.

Indeed, having portable environment access would be great.

In CLPython I need to keep track of context state, e.g. for
namespaces. In Allegro that can be done with EA using a custom
declaration (see define-declaration), which makes the context
information part of  the environment object. That feels very elegant.
In other implementations that mechanism has to be simulated using
(symbol)macros, which is a bit of a hack.

- Willem