X-Git-Url: http://git.megacz.com/?p=coq-hetmet.git;a=blobdiff_plain;f=examples%2FGArrowSkeleton.hs;h=c63fd151a43840df2b6f7d369a7c68be243498c2;hp=c07c64ab20583c8dc40aac3bd9d10c36a0b06346;hb=aaad4c11e0da05d9daa683bbf61f56769c0d68fb;hpb=cacf56c9e223e864884317718b09c33bd6a37635

diff --git a/examples/GArrowSkeleton.hs b/examples/GArrowSkeleton.hs
index c07c64a..c63fd15 100644
--- a/examples/GArrowSkeleton.hs
+++ b/examples/GArrowSkeleton.hs
@@ -127,6 +127,10 @@ optimize x = let x' = optimize' x in if x == x' then x' else optimize x'
   -- left-associativity and hope for the best
   optimize' (GAS_comp      f (GAS_comp g h)) = GAS_comp (GAS_comp f g) h
   optimize' (GAS_comp    (GAS_comp f (GAS_comp g h)) k) = GAS_comp (GAS_comp (GAS_comp f g) h) k
+
+  optimize' (GAS_comp    (GAS_comp             GAS_unassoc  (GAS_second g)) GAS_assoc)   = GAS_second (GAS_second g)
+  optimize' (GAS_comp    (GAS_comp (GAS_comp f GAS_unassoc) (GAS_second g)) GAS_assoc)   = GAS_comp f (GAS_second (GAS_second g))
+
   optimize' (GAS_comp    (GAS_comp f g) h) = case optimize_pair g h of
                                                Nothing   -> GAS_comp (optimize' (GAS_comp f g)) h'
                                                Just ret' -> GAS_comp f' ret'
@@ -181,6 +185,8 @@ optimize x = let x' = optimize' x in if x == x' then x' else optimize x'
   optimize_pair GAS_assoc   GAS_cancell       = Just $ GAS_first GAS_cancell
   optimize_pair GAS_unassoc GAS_cancelr       = Just $ GAS_second GAS_cancelr
   optimize_pair GAS_assoc   (GAS_second GAS_cancell)  = Just $ GAS_first GAS_cancelr
+  optimize_pair GAS_unassoc (GAS_first  GAS_cancell)  = Just $ GAS_cancell
+
 
   -- FIXME: valid only for central morphisms
   --optimize_pair (GAS_second f) (GAS_first g) = Just $ GAS_comp (GAS_first g) (GAS_second f)