[plt-scheme] scribblings on PLT Scheme 4.0

From: Robby Findler (robby at cs.uchicago.edu)
Date: Thu May 24 13:06:44 EDT 2007

Right. And, chances are, if they do, they will break the PLaneT code!

But, if the code follows that in the plt tree and/or that in planet, they don't.

Whcih seems relatively safe, either way :)


On 5/24/07, Jens Axel Søgaard <jensaxel at soegaard.net> wrote:
> Jacob Matthews skrev:
> > In general, the more quickly PLT Scheme versions break backwards
> > compatibility the less useful old code is, on PLaneT and elsewhere.
> > But in the particular case of making pairs immutable by default, it
> > doesn't look like this will be a major source of incompatibility for
> > PLaneT packages: only 30 modules (not packages, module files) in all
> > most-current-versions of PLaneT packages (1359 total) contain any uses
> > of set-car! or set-cdr!.
> In principle we don't know whether users of the PLaneT packages
> mutate the lists returned.
> --
> Jens Axel Søgaard
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