Re: OOP with units and mixins

[Robert Bruce Findler <robby@cs.rice.edu>]

Sorry for the long delay in response.

The code in that paper was written for version 53. A major changed
occurred between 53 and 100 so that code was all broken.

I have fixed it up and made sure that it runs in 103 (due in the next
few days). It should also be fine in 102.

Robby

Hassoun wrote:
> 
> i am trying to learn Modular Object-Oriented Programming with Units and
> Mixins, according to the excellent paper by R.B Findler and M. Flatt.
> 
> i am using DrScheme v102 and i would like to implement the code in
> graphical full scheme.
> 
> any hints about the necessary changes to apply on the following code
> (taken from the paper's source):
> 
> ;; special mumbo-jumbo to load in the MrEd library.
> (require-library "debug.ss" "system")
> (require-library "sig.ss" "mred")
> (require-library "wxs.ss" "system")
> (define MrEd-Toolkit
>   (unit/sig->unit
>    (compound-unit/sig
>        (import)
>      (link [C : mzlib:core^ ((require-library "corer.ss"))]
>            [M : mred^ ((require-library "link.ss" "mred") C)])
>      (export
>       (var (M wx:pen%))
>       (var (M wx:brush%))
>       (var (M wx:const-solid))
>       (var (M canvas%) mred:canvas%)
>       (var (M frame%) mred:frame%)
>       (var (M vertical-panel%) mred:vertical-panel%)))))
> 
> your help would be greatly appreciated
> --
> Hassoun Karam
> hassoun@sympatico.ca
> --------------------------