[Haskell-cafe] I love purity, but it's killing me.

Felipe Lessa felipe.lessa at gmail.com
Sat Feb 9 09:46:58 EST 2008

On Feb 9, 2008 12:34 PM, Bertram Felgenhauer
<bertram.felgenhauer at googlemail.com> wrote:
> ghc actually provides a primop for this:
>   reallyUnsafePtrEquality# :: a -> a -> Int#
> Use at your own risk.

Why is it more than unsafe? 'unsafePerformIO' seems to me a lot
unsafer than 'reallyUnsafePtrEquality#'.

Also, is anybody using 'reallyUnsafePtrEquality#' on a working project?



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