Re: deriving...

Keean Schupke writes:

...

Yes, I could quite easily write the generator in TemplateHaskell (have played with it before) _but_ I don't like the $(xxx) syntax... Perhaps if Simon could be persuaded to allow deriving clauses to be defined in TH?

data X x = X x $(deriveMyClass (reify X))

could perhaps be defined from

data X x = X x deriving MyClass

I saw the same suggestion earlier today on the Haskell list...

Check out Ulf Norell's IOHCC submission, his DeriveData.hs module does this, though I can't tell if it will work for parameterized types.

It doesn't. A version that does can be downloaded from http://www.cs.chalmers.se/~ulfn/th/DeriveData.hs / Ulf