[Haskell-cafe] Re: Versioning

[Joachim Durchholz]

Robert Dockins schrieb:
> 
> Let me just say here that what you are attempting to do sounds very 
> difficult.  As I understand, you want to be able to serialize an entire 
> application at some (predetermined / arbitrary?) point, change some of 
> its code and/or data structures, de-serialize and run the thing 
> afterwards.

Right.

Though it's not too far out of the ordinary. Haskell being a rather 
orthogonal language, I had hoped that I can "simply serialize" any data 
structure.

 > Doing something like this without explicit language support
> is going to be hard, especially in a fairly static language like Haskell.

Exactly.
I was intrigued when I found that libraries can do quite a lot 
serialization in Haskell - that gives Haskell an excellent rating in 
what could be called "aspect-orientedness".
It doesn't help to serialize functions values or thunks, though.

> I would think Smalltalk, Erlang, or something from the Lisp/Scheme 
> family would be more suitable for this sort of work (caveat, I have 
> little experience with any of these languages). 

Erlang is actually on my list of potential alternatives. It has 
different advantages than Haskell, though, and right now, I'm willing to 
try Haskell.

> Also, take a look here (http://lambda-the-ultimate.org/node/526) for
> some related discussion.

I'm not sure whether that relates to my project. I let network 
connections be handled by Apache and FastCGI, so I'm leaving out a whole 
lot of library issues that hit that reported project really hard.

Regards,
Jo