ST Questions

[Fergus Henderson]

On 27-Jul-2001, Ashley Yakeley <ashley@semantic.org> wrote:
> Two questions on module ST:
> <http://www.haskell.org/ghc/docs/latest/set/sec-st.html>
> 
> 1. What's the 's' parameter for?

It makes sure you don't try to use a reference obtained
from one state thread in a different state thread.

> 2. Do STRefs get garbage-collected once they're forgotten?

In any decent implementation, yes.

-- 
Fergus Henderson <fjh@cs.mu.oz.au>  |  "I have always known that the pursuit
The University of Melbourne         |  of excellence is a lethal habit"
WWW: <http://www.cs.mu.oz.au/~fjh>  |     -- the last words of T. S. Garp.