[Haskell-cafe] Re: Why?
stephen.tetley at gmail.com
Thu Dec 10 12:45:46 EST 2009
Apropos the (unfortunately) frosty exchanges that greeted the first
release of UHC a couple of months ago, which argued that UHC wasn't
Haskell because it didn't implement n+k patterns, one could argue (at
least for rhetorical effect) that Haskell plus unsafePerformIO isn't
Haskell, I don't think you'll be able to find unsafePerformIO in the
2009/12/10 David Leimbach <leimy2k at gmail.com>:
> That's not a "safe" way to think of 3rd party libraries. It is a convenient
> claim for promoting the language, and is probably more often than not the
> case though it does not quite capture the whole truth. unsafePerformIO can
> exist in any library you import,
> In short unsafePerformIO, while it's "supposed to be" avoided, may not be
> avoided as much as the advice given to do so :-).
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