modifyIORef lazy? (was Re: BLACKHOLE in heap profile)

[Tomasz Zielonka]

On Sat, Apr 19, 2003 at 12:29:13PM +1200, Tom Pledger wrote:
> You should get the same result with
> 
>     modifyIORef r $! <E>

But this will only force evaluation of the function passed to
modifyIORef, won't it?

Best regards,
Tom