[Haskell-cafe] Info about List with terminal element

[David Kraeutmann]

I'm not quite sure I understand the purpose of this structure. As far as I can tell, it's isomorphic to list (even under laziness) with some minor differences in performance characteristics (determining whether a cons cell is terminal requires evaluating the subsequent list to WHNF, whereas in your structure it follows from the constructor. But I think that's just a minor performance detail).

On 11/25/2015 8:04 PM, Silvio Frischknecht wrote:
> > readFile :: String -> List Error String
>
> should have been
>
> readFile :: String -> IO (List Error String)
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