[Haskell-beginners] Non ghc specific FRP (using uhc js backend)

[Nathan Hüsken]

Hey,

Ah, very nice to see that there is interest in making a UHC compatible
version.
I tried the following: I made file Test.hs with only

import Reactive.Banana

in it. ghc compiles fine except telling me that main is missing.
"uhc -tjs" complains about missing Data/Hashable and Control/Concurrent.
That's all I know.

Best regards,
Nathan

On 03/29/2012 10:05 AM, Heinrich Apfelmus wrote:
> Nathan Hüsken wrote:
>>
>> I am currently informing myself about FRP. Looking at the Elerea paper
>> (http://sgate.emt.bme.hu/documents/patai/publications/PataiWFLP2010.pdf)
>> I read that it is ghc specific because of mutable references.
>> I am trying to use the js backend of uhc and that does not support this.
>> I have tried to use other FRP libraries with uhc (by compiling a file
>> which does nothing but import the library) and all failed because of
>> something missing in Control.Concurrent.
>>
>> So I am wondering: Is it a property FRP that it needs something like
>> mutable references for an efficient implementation.
>> Is there a FRP library that can be used (or can be changed so that it
>> can be used) with uhc and its js backend?
> 
> I think that my reactive-banana library can be adapted to work on UHC. I
> will look into this. See issue
> 
>   https://github.com/HeinrichApfelmus/reactive-banana/issues/30
> 
> 
> However, I would be very surprised if UHC doesn't have mutable
> variables, the reason is likely a GHC specific extension. Are you sure
> that UHC doesn't support IORef or MVar?
> 
> 
> Best regards,
> Heinrich Apfelmus
> 
> -- 
> http://apfelmus.nfshost.com
> 
> 
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