1 Apr
2015
1 Apr
'15
5:44 p.m.
Hello, Well, to properly implement zoom, you'd have to use a similar approach to http://hackage.haskell.org/package/lens-4.8/docs/Control-Lens-Internal-Zoom.... and implement the Zoom type class. Perhaps try implementing http://hackage.haskell.org/package/mmorph-1.0.4/docs/Control-Monad-Morph.htm... and use (hoist $ zoom whatever) instead? Best regards, Marcin Mrotek