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rewrite rule をもっと簡単に書けるようにする #132

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kmyk opened this issue Aug 2, 2021 · 0 comments · Fixed by #133

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kmyk commented Aug 2, 2021

GHC の RULES pragma みたいに手軽に書きたい

{-# RULES
  "map/map"    forall f g xs.  map f (map g xs) = map (f.g) xs
    #-}

Template Haskell を使って準クオートで書けるようにするのがよい気がする

mapMapReduce :: Monad m => RewriteRule m
mapMapReduce = [rule| "map/map"  forall f g xs.  map f (map g xs) = map (f.g) xs |]

kmyk mentioned this issue

Add a quasi quote for rewrite rules #133

Merged

kmyk closed this as completed in #133

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