That eta-expansion desugaring would lose sharing. Offhand, I don't know of a desugaring that would do the trick and preserve sharing. Any ideas? - Conal
On Jan 13, 2008 3:12 PM, Neil Mitchell <[EMAIL PROTECTED]> wrote: > Hi, > > It's nice to write functions in point free style: > > f = sort . nub > > But sometimes I have to add an extra case, on a certain value: > > f [] = [1] > f = sort . nub > > But now these equations have different arities, and its rejected by > Haskell. Why does this not simply desugar to: > > f [] = [1] > f x = (sort . nub) x > > i.e. lift the arities to the longest argument list. > > Is there a reason this isn't done? > > Thanks > > Neil > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe >
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