Template Haskell...

Ulf Norell ulfn at cs.chalmers.se
Thu Oct 21 05:57:52 EDT 2004


MR K P SCHUPKE wrote:

>Thanks for the URL... I have realised I jumped the gun saying the derivation can be 
>done in template-haskell... there is one small problem:
>
>$(derive [t| SomeConstructor a b |])
>
>passes the constructor to derive... is there any way to get the type information
>for some type? You can do
>
>$(derive [d| data X a b = X1 a b |])
>
>Is there any way to get the same information from something like:
>
>$(derive2 [T| X a b |])
>  
>
You would have to say

$(derive (reifyDecl X))

/ Ulf


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