Imperative data structures

[John Meacham]

Wasn't there a plan to make a superclass which all 'stateful' monads
could be instances of, so we no longer have this IO vs. ST problem? 
        John

On Fri, May 30, 2003 at 05:13:36AM +0300, Lauri Alanko wrote:
> In GHC 6.0 there is a new data structure, Data.HashTable. Why is it
> based on the IO monad instead of ST? I really think it should be a
> general policy that imperative data structures be based on the ST monad
> so they can be used for implementing observably pure functions. There's
> always stToIO for when one really wants to do stuff in the IO monad.
> 
> 
> Lauri Alanko
> la@iki.fi
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John Meacham - California Institute of Technology, Alum. - john@foo.net
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