[Haskell-cafe] Type system madness
Stefan O'Rear
stefanor at cox.net
Thu Jul 12 03:18:02 EDT 2007
On Thu, Jul 12, 2007 at 09:12:14AM +0200, Henning Thielemann wrote:
>
> On Tue, 10 Jul 2007, Jonathan Cast wrote:
>
> > On Tuesday 10 July 2007, Andrew Coppin wrote:
> > > Stefan O'Rear wrote:
> >
> > > > Consider the ST monad, which lets you use update-in-place, but is
> > > > escapable (unlike IO). ST actions have the form:
> > > >
> > > > ST s α
> > > >
> > > > Meaning that they return a value of type α, and execute in "thread" s.
> > > > All reference types are tagged with the thread, so that actions can only
> > > > affect references in their own "thread".
>
> What about putting the runST monad explanation to the Wiki? It seems to be
> an FGA (frequently given answer). :-)
I think it already is, in the Research Papers section. :-)
Stefan
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