[Haskell-cafe] Re: Converting IO [XmlTree] to [XmlTree]
Martijn van Steenbergen
martijn at van.steenbergen.nl
Tue Apr 28 03:47:57 EDT 2009
Steffen Schuldenzucker wrote:
> Uhm, isn't it:
> class (Functor f) => Pointed f where
> pure :: a -> f a -- singleton, return, unit etc.
> Got it from: The Typeclassopedia by Brent Yorgey (forgot the URL, sorry)
Yes, but also: http://thread.gmane.org/gmane.comp.lang.haskell.cafe/54685
So maybe functor is not strictly more powerful than pointed and vice
versa. I don't know.
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