[plt-scheme] Modules, structs and environments

"Jacob Matthews" <jacobm at cs.uchicago.edu> writes:

> I agree with Chongkai and with Noel. 

I would agree with him too if I knew what he meant ;)  I'm inclined to
go for "more hassle, more control" since part of the point is to learn
how to do this stuff.

> As an example of what Noel is saying, you can use a customized
> namespace to solve your particular problem like this:

[...]

>   (define ns (make-namespace))             ; make a namespace with the
> basic set of bindings
>   (parameterize ([current-namespace ns])   ; make eval look up names in ns
>     (namespace-require "struct.ss")        ; put the names from
> "struct.ss" into ns
>     (read-eval-print-loop)))

That's exactly what I want to do.  I tried somthing similar and still
got the error:
;;;;;;;;;;;;;;;;;;;;
(define the-environment (current-namespace))
(parameterize ((current-namespace the-environment))
              (read-eval-print-loop))
;;;;;;;;;;;;;;;;;;;;

Now I see where the mistake was --- I didn't know about (make-namespace).
              
Thanks for pointing out the nuance.
Joel
-- 
Joel J. Adamson
Biostatistician
Pediatric Psychopharmacology Research Unit
Massachusetts General Hospital
Boston, MA  02114
(617) 643-1432
(303) 880-3109

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