[plt-scheme] htdp and modules

On Nov 22, 2007, at 9:24 PM, Prabhakar Ragde wrote:

> Matthias Felleisen wrote:
>
>> If I were to include modules in teaching languages, what I  
>> sketched out with my messages to Jan is what I would include. So  
>> this is a strange issue: the module stuff is almost orthogonal to  
>> the language level. Due to restrictions on where function names  
>> can appear, you can't use Beginning Student [+ ...] but that's  
>> okay with me.
>
> That is just fine.
>
> To talk about ADTs, we also need the ability to optionally make  
> structures opaque outside a module, without hinting at deep magic.  
> Also some way of letting students run non-blackbox tests without  
> having to know I/O -- perhaps the ability to "run" a module and  
> evaluate/print the expressions in it.

I don't think so. Just because students can see the content, their  
programs can't access the struct fields unless you export the accessors.

-- Matthias