id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
38	Create user defined data sturcture as instance of Elem	fxie	chak	"Hi, I'm trying to use accelerate to write multipole solver using CUDA as backend.

I wanted to create user defined data structure like:
{{{
data Panel b a
     = Panel { getBounds    :: b
             , getSrcBounds :: (Int, Int)
             -- , getFarExpan  :: Array Int a
             }
       deriving (Show, Typeable)
}}}
But I found that it's hard to declare it as an instance of `Elem' because its methods are hidden.

I understand that user can define a type using nested (,). But it would be nice to expose `Elem' to end user so user can use any type as `Elem'. Is there any concern about this?"	enhancement	new	major		Accelerate language