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🔥 zipTerms.

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This commit is contained in:
Rob Rix 2017-09-08 17:18:03 +01:00
parent fe3fa0e811
commit ee27d73747
1 changed files with 0 additions and 9 deletions
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src/Term.hs
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@ -4,7 +4,6 @@ module Term
, TermF(..)
, SyntaxTerm
, SyntaxTermF
, zipTerms
, termSize
, alignTermWith
, cofree
@ -18,9 +17,7 @@ import Control.Comonad
import Control.Comonad.Cofree.Class
import Control.DeepSeq
import Control.Monad.Free
import Data.Align.Generic
import Data.Bifunctor
import Data.Functor.Both
import Data.Functor.Classes
import Data.Functor.Classes.Pretty.Generic as Pretty
import Data.Functor.Foldable
@ -49,12 +46,6 @@ instance (NFData (f (Term f a)), NFData a, Functor f) => NFData (Term f a) where
instance (NFData a, NFData (f b)) => NFData (TermF f a b) where
rnf (a :<< s) = rnf a `seq` rnf s `seq` ()
-- | Zip two terms by combining their annotations into a pair of annotations.
-- | If the structure of the two terms don't match, then Nothing will be returned.
zipTerms :: (Traversable f, GAlign f) => Term f annotation -> Term f annotation -> Maybe (Term f (Both annotation))
zipTerms t1 t2 = iter go (alignTermWith galign (const Nothing) both (These t1 t2))
where go (a :<< s) = (a :<) <$> sequenceA s
-- | Return the node count of a term.
termSize :: (Foldable f, Functor f) => Term f annotation -> Int
termSize = cata size where