[Haskell-cafe] CIS 194 not compiling under new GHC

[Brent Yorgey]

https://github.com/byorgey/haskell-course is the canonical github repo with
the materials (though unfortunately I think most people get the material
from the upenn-hosted site, which I no longer have access to).  I'm very
happy to take PRs with updates.

-Brent

On Sun, Nov 6, 2022 at 12:48 PM Jeff Clites via Haskell-Cafe <
haskell-cafe at haskell.org> wrote:

> > On Nov 6, 2022, at 9:47 AM, Borys Kopeć <boryskopec00 at gmail.com> wrote:
> >
> > I know I could google each one, make the compiler happy and then get on
> with exercises but I think that this is not an optimal learning experience.
>
> Not ideal, but it would be worth giving it a try and seeing if you can
> push through, because deciphering compiler errors are something you will
> have to deal with when writing your solutions, so it's educational in its
> own way. It might turn out to be just a few things that need fixing up.
>
> > Also I don't know whether all exercises are even sensical with new
> features being added.
>
> I would think they probably are still relevant; the language concepts
> haven't changed.
>
>
> (I did some quick Googling to see if anyone had put an updated version on
> GitHub, but I didn't turn anything up. There are a bunch of repos with
> exercise solutions, so some of them might contain updates to the provided
> sources but I didn't dig into it.)
>
> Jeff
>
> > On Sun, 6 Nov 2022 at 18:44, Brandon Allbery <allbery.b at gmail.com>
> wrote:
> > This being a beginners course, it would still be better if it were
> > kept up to date with such changes instead of requiring newcomers to
> > know about them. Byorgey?
> >
> > On Sun, Nov 6, 2022 at 12:42 PM David Feuer <david.feuer at gmail.com>
> wrote:
> > >
> > > The changes needed to make it work should be minor. Since you call out
> the chapter on monoids, any Monoid instance now needs a Semigroup instance.
> > >
> > > Before:
> > >
> > > instance Monoid X where
> > >   mappend a b = ...
> > >   mempty = ...
> > >
> > > Now:
> > >
> > > instance Semigroup X where
> > >   a <> b = ...
> > > instance Monoid X where
> > >   -- mappend no longer needs to be defined
> > >   mempty = ...
> > >
> > > On Sun, Nov 6, 2022, 12:37 PM Borys Kopeć <boryskopec00 at gmail.com>
> wrote:
> > >>
> > >> Hi all,
> > >>
> > >> I've been working through the CIS 194 course recently and
> unfortunately from lecture 7 onwards the code is not compliant with current
> compiler.
> > >>
> > >> I can still follow the lectures but I'd like to do every homework
> exercise. Unfortunately most homework exercises provide you with a code
> framework to work with and this code does not compile.
> > >>
> > >> Do any of you know about updated versions or corrections to this
> course? I believe there could be a repo where someone is keeping the
> course's homework up to date because this course is still quite popular.
> > >>
> > >> Regards
> > >> Borys
> >
> > --
> > brandon s allbery kf8nh
> > allbery.b at gmail.com
>
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