Tue Feb 12 03:25:04 PST 2008 Alexey Rodriguez * Simplification of representation of arity two Previously the arity two representation was |data Rep2 f a b c d = ...| where |c| and |c| represented the non-generic variables (for example for the two variables used in crushRight: |Rep2 CrushRight a b c d| and |newtype CrushRight c b a x = CrushRight { crushRight :: (c -> b -> b) -> b -> a -> b } ). It turns out that |Rep2| does not need the additional c and d, we do the same thing that the EMGM version of the test was doing:

data Rep2 f a b = ... newtype CrushRight c b a x = CrushRight { crushRight :: (c -> b -> b) -> b -> a -> b } so it is represented as |Rep2 (CrushRight c d) a b|.

M ./comparison/LIGD/BinTreeReps.hs -1 +1 M ./comparison/LIGD/CrushRight.lhs -5 +4 M ./comparison/LIGD/GMap.lhs -6 +4 M ./comparison/LIGD/LIGD.lhs -27 +27 M ./comparison/LIGD/TreeReps.hs -1 +1