Despite having the same name, these two are quite different from what
I remember. The GHC.Event one (which me/Bryan added) is just a wrapped
Int, while the Data one is really more of a mutable state thing.
On Sat, Aug 2, 2014 at 8:40 AM, Michael Schröder
Is there a reason GHC.Event.Unique exists, since we also have Data.Unique? Or is this just a historical artifact? It looks like they used to have the same implementation, but have now diverged, with Data.Unique being the more recent one.
GHC.Event.Unique still uses STM internally, and is as far as I can see the only part of the base library to do so. Which wouldn't really matter, except that now basic IO stuff like threadDelay and even putStr (sometimes, especially in ghci) cannot be used inside unsafeIOToSTM. Which is somewhat annoying…
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