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pedrofurla/gist:8414258

Created January 14, 2014 06:59
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Is this impl so wrong?
Raw
gistfile1.hs
instance Apply MaybeListZipper where
(IsZ l) <*> (IsZ r) = IsZ $ l <*> r
_ <*> _ = IsNotZ
Build FAILED
/Users/pedrofurla/dev/projects/nicta-fp-course/src/Course/ListZipper.hs: line 605, column 31:
Ambiguous occurrence `<*>'
It could refer to either `Course.ListZipper.<*>',
defined at src/Course/ListZipper.hs:605:9
or `Course.Apply.<*>',
imported from `Course.Apply' at src/Course/ListZipper.hs:10:1-19
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