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Update Element.hs

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Ayman Nadeem 2020-05-08 14:52:02 -04:00
parent 9c812a7ffb
commit 9255d5c46f
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semantic-ast/src/AST/Element.hs
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@ -18,7 +18,6 @@ class Element sub sup where
instance (Element' side sub sup, side ~ Find sub sup) => Element sub sup where
prj = prj' @side
-- | A pattern synonym to conveniently project out matching elements.
pattern Prj :: Element sub sup => sub a -> sup a
pattern Prj sub <- (prj -> Just sub)