A typeclass for byte operations?
Don Stewart
dons at galois.com
Thu Feb 19 19:12:01 EST 2009
lemming:
>
> On Thu, 19 Feb 2009, Don Stewart wrote:
>
>> lemming:
>>>
>>> In contrast to Data.Bits it should use the proper parameter order, e.g.
>>> rotateBytes :: Int -> a -> a
>>
>> Proper in the Okasaki sense?
>
> Unfortunately I don't know what Okasaki's sense is, but I refered to this
> one:
> http://haskell.org/haskellwiki/Parameter_order
You made me go and dig through the archives!
http://article.gmane.org/gmane.comp.lang.haskell.libraries/3650/
http://article.gmane.org/gmane.comp.lang.haskell.libraries/3654/
In response to questions about why the convention of putting the
data structure as the last argument...
This style supports multiple operations nicely, especially with
combined with the $ operator. For example, to insert 3 elements
into a set, you can say
insert 1 $ insert 2 $ insert 3 $ someSet
(the last $ is optional). With the other argument ordering, you
would say
insert (insert (insert someSet 3) 2) 1
See the entire thread:
http://thread.gmane.org/gmane.comp.lang.haskell.libraries/3622/focus=3650
from 2005.
-- Don
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