It is implemented in GHC HEAD: http://hackage.haskell.org/trac/ghc/wiki/OverloadedLists


On Fri, Feb 22, 2013 at 2:29 AM, David McBride <toad3k@gmail.com> wrote:
At the moment, no.  There has been a small push toward an OverloadedLists extension, which would allow you to use list syntax for anything that has a fromList (there would probably be an IsList class similar to the IsString class).  I'm not sure where that has gone.  I know there were several competing implementations.


On Thu, Feb 21, 2013 at 6:43 PM, Heinrich Ody <heinrich.ody@gmail.com> wrote:
Hi,

with [1,2] I can declare a list. Is there a similar notation for sets?
Currently the only way I know is 'Set.fromList [1,2]' which is unhandy...

Regards,
Heinrich

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