[Haskell-cafe] Re: Order of Evaluation

Achim Schneider barsoap at web.de
Fri May 9 17:34:40 EDT 2008


Miguel Mitrofanov <miguelimo38 at yandex.ru> wrote:

> > As I understand it Haskell does not specify an order of evaluation
> > and it would therefore be a mistake to write a program which relies
> > on a particular evaluation order. This is the 'unsafe' aspect of
> > unsafePerformIO.
> 
> Hmm... IMHO unsafePerformIO is 'unsafe' because it can lead to type  
> errors in runtime. At least, that seems to be much more dangerous.
>
Nope. That'd be unsafeCoerce#, which you never heard of, and I did not
mention it in this post. Go away. This is not the function you are
looking for.

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