[Haskell-cafe] Re: derive & Drift - some help please

Hi Alexander, well I have this: newtype AdmissionDate = AdmDt LocalTime deriving (Data,Typeable ..) at least that's where I wonna get. I don't know how to create the proper instance declarations though for LocalTime. AdmissionDate is an element of a larger data structure, this data structure for instance also has a newtype DischargeDate = DchrgDt LocalTime deriving (Data,Typeable ...) With my haskell work so far I was blessedly free of the need for deriving. Until now ... Günther Alexander Dunlap schrieb:

What problems are you encountering?

Alex

On Sun, Mar 8, 2009 at 11:58 AM, G?uenther Schmidt wrote:

...

Hi Sterling,

sry, but I can't get it to work.

Günther

Sterling Clover schrieb:

...

You shouldn't need any extra tools for this. A combination of the StandaloneDeriving and DeriveDataTypeable extensions in GHC should suffice.

Cheers, S.

On Sun, Mar 8, 2009 at 10:30 AM, Gü?nther Schmidt mailto:gue.schmidt@web.de> wrote:

Hi,

I need to derive Data, Typeable for Data.Time.LocalTime. I had hoped to use either derive or DrIFT to generate the instance declarations for it.

I tried to understand the respective user manuals but it's still all Greek to me.

Someone please help!

Günther

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