[Haskell-cafe] Question on `runState'

Conrad Parker conrad at metadecks.org
Tue Oct 18 02:32:40 CEST 2011

On 17 October 2011 23:59, Captain Freako <capn.freako at gmail.com> wrote:
> In this excerpt from the `StateArrow' page:
> runState :: Arrow a => StateArrow s a e b -> a (e, s) (b, s)Source
> what's the significance of having written "StateArrow s a e b", instead of
> "StateArrow s a b c"?

In the context of that page, do you think e might stand for something?

btw. what's the URL?


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