[Haskell-cafe] Need ideas how to model the lack of something

Joachim Durchholz jo at durchholz.org
Mon Dec 14 06:28:49 UTC 2015

Am 14.12.2015 um 01:28 schrieb Kim-Ee Yeoh:
> On Mon, Dec 14, 2015 at 3:15 AM, martin <martin.drautzburg at web.de> wrote:
>> I started like this
>> data C a = C {
>>              insert :: a -> Maybe (C a),
>>              remove :: Maybe (a, C a)
>>          }
>> but I could not implement anything sensible on top of this.
> And the reason you're stuck implementing anything sensible on top of this
> is because you've written an OOP-style specification of a data structure.

Mmm... this is the second time this has been raised.
What's the problem with OOP style? Something specific with Haskell, 
something about OOP in general, something else?


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