I was wondering about this: -- My goal with this instance was to make it work just enough to do what -- I want when used with the HStringTemplate library. instance Data UUID where toConstr uu = mkConstr uuidType (show uu) [] (error "fixity") gunfold _ _ = error "gunfold" dataTypeOf _ = uuidType Is there any reason not to just say "deriving Data" in the type declaration? On Wed, Jun 13, 2012 at 8:59 PM, Antoine Latter wrote:

Hi folks,

I'm happy to announce a new point release of the uuid library, 1.2.6:

http://hackage.haskell.org/package/uuid-1.2.6

The 'uuid' package implements most of RFC 4122[1] including random generation and generation based on hardware MAC addresses.

I haven't announced a point-release in a while. The changes since 1.2.1 include:

* When generating UUIDs from the hardware MAC address, if the MAC address is not available we now use a random seed for our (hidden, global) state machine

* The 'Read' instance now drops leading spaces

* Added the functions 'toWords' and 'fromWords', primary to support the package uuid-quasi[2].

Take care, Antoine

1: http://tools.ietf.org/html/rfc4122 2: http://hackage.haskell.org/package/uuid-quasi

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