[Haskell] Question concerning the "Data Parallel Haskell: a status report" paper

[Stephan Friedrichs]

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Hi Haskellers,

the paper "Data Parallel Haskell: a status report" (Chakravarty,
Leshchinskiy, Peyton Jones, Keller and Marlow) is an important source of
my seminar handout about skeletons and parallelisation. It contains code
samples concerning the ArrElem type family:

class ArrElem e where
	data [:e:]
	(!:) :: [:e:] -> Int -> e

and various instance declarations, e.g.:

class ArrElem Int where -- sic!
	-- ...

My question is: Is "class ArrElem Int" a typo and should be "instance
ArrElem Int" or did I get something wrong?

Thanks in advance and a happy new year
 - Stephan

- --

Früher hieß es ja: Ich denke, also bin ich.
Heute weiß man: Es geht auch so.

 - Dieter Nuhr
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