[Haskell-cafe] Being impure within a 'pure' function

Bulat Ziganshin bulat.ziganshin at gmail.com
Wed Apr 22 05:27:25 EDT 2009

Hello Jason,

Wednesday, April 22, 2009, 1:14:49 PM, you wrote:

there is no any need in unsafePerformIO for array computations - ST
monad is exactly what one need here

>   If you want to do raw IO and repackage it as "pure", you can
>   use `unsafePerformIO` and friends. It is important to use the
>   `NOINLINE` pragma in that case.

> --
> Jason Dusek

>  |...unsafePerformIO...|
> http://haskell.org/ghc/docs/latest/html/libraries/base/System-IO-Unsafe.html#v%3AunsafePerformIO
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Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com

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