[Haskell-cafe] Non Empty List?

[GüŸnther Schmidt]

Hi,

I need to design a container data structure that by design cannot be 
empty and can hold n elements. Something like a non-empty list.


I started with:

data Container a = Single a | Many a [a]		

but the problem above is that the data structure would allow to 
construct a Many 5 [] :: Container Int.

I can't figure out how to get this right. :(

Please help.

Günther