[Haskell-cafe] Make a DSL serializable

[Corentin Dupont]

What do you mean by monoid? It's not clear to me how a state (essentially a
structure with many fields) can be a monoid...
I figured out that the Writer monad may be good for that purpose.

On Mon, Mar 25, 2013 at 1:50 AM, Alberto G. Corona <agocorona at gmail.com>wrote:

> That is the advantage of recording the sequence of events instead of the
> final state: that the  state don´t need to be seriallizable. And this
> indeed the way to serlize something that can be decomposed in events. I
> think that this is elegant.. Specially if the events  and the state are
> elements of a Monoid instance.
>
>
> 2013/3/24 Corentin Dupont <corentin.dupont at gmail.com>
>
>> Hi Brandon,
>> in fact, that's what I'm doing. I record the list of actions performed by
>> the players, including the submission of the code. I serialize this list of
>> actions instead of the state of the game. When deserializing, I replay all
>> the players actions from scratch to get back to the same state than before.
>> This is the only way to do it (replaying from scratch), since the pieces of
>> code submitted can interact with other pieces of code submitted earlier:
>> they are not independant.
>> But I always bothered me that this state is not serializable...
>>
>>
>> On Sun, Mar 24, 2013 at 10:02 PM, Brandon Allbery <allbery.b at gmail.com>wrote:
>>
>>> On Sun, Mar 24, 2013 at 4:16 PM, Corentin Dupont <
>>> corentin.dupont at gmail.com> wrote:
>>>
>>>> Hi Daniel,
>>>> in my game the handlers are supplied by the players as part of little
>>>> programs that they submit. An haskell interpreter is reading the program
>>>> code submitted and inserts it in the game.
>>>> So there is an infinite number of handlers...
>>>>
>>>
>>> You might store both the compiled code and the originally submitted
>>> code, and serialize the latter in a form that restart can recompile. I
>>> don't think that can be any less safe than the original
>>> submission/compilation/insertion.
>>>
>>> --
>>> brandon s allbery kf8nh                               sine nomine
>>> associates
>>> allbery.b at gmail.com
>>> ballbery at sinenomine.net
>>> unix, openafs, kerberos, infrastructure, xmonad
>>> http://sinenomine.net
>>>
>>
>>
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>
>
> --
> Alberto.
>
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