2 Dec
2009
2 Dec
'09
7:40 p.m.
The idea is that there's just enough unwrapping such that you don't need to use getDual and appEndo. On Dec 3, 2009, at 1:25 AM, Holger Siegel wrote:
Am Donnerstag, den 03.12.2009, 01:16 +0100 schrieb Martijn van Steenbergen:
So here's a totally wild idea Sjoerd and I came up with.
What if newtypes were unwrapped implicitly?
What advantages and disadvantages would it have? In what cases would this lead to ambiguous code?
1) instance Monoid a => Monoid (Dual a)
2) instance Monoid (Endo a) instance Monoid b => Monoid (a -> b)
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