[plt-scheme] Changing field values in objects

This isn't a nice way of doing it, but this works:

<your code, then ...>

(define set-value! (class-field-mutator test% value))
(set-value! t 20)

The nice way, I presume would be to define a public accessor method.

I got this from the class.ss documentation in the libraries manual.  Given my 
very casual perusal, I will say that it looks like it doesn't serve well as a 
tutorial.

Mike

Robert Matovinovic wrote:
> Hi,
> I'm nearly desparate, since I'm trying to do a simple thing: changing the
> value of a field in an object. I read the help desk thoroughly and tried a
> lot, but couldn't find a solution, which to most of you must be obvious. So
> here is a bit of sample code. I would appreciate very much if someone can
> just add the lines to change the value of the value field:
> 
> (define test%
>   (class object%
>     (init-field (value 0))
>     (super-new)
>     )
>   )
> (define t (new test% (value 10)))
> (get-field value t)
> 
> BTW, is there any tutorial to familiarize oneself easily with the object
> system of plt scheme?
> 
> Thanks in advance
> Robert
> 
> _________________________________________
> Robert Matovinovic
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>  
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> email: robert.matovinovic at web.de
> 
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