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Simplify the non-Copy cases.

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Rob Rix 2017-09-10 17:43:12 +01:00
parent 472363e3e9
commit dbc79d8ab0
1 changed files with 1 additions and 2 deletions
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src/Diff.hs
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@ -69,8 +69,7 @@ evalDiffRM algebra = go
env <- ask
let extended = foldr (uncurry envExtend) env bindings
local (const extended) $ algebra (Copy bindings ann syntax)
Patch patch -> algebra (Patch patch)
Var var -> algebra (Var var)
_ -> algebra diff
diffSum :: (Foldable syntax, Functor syntax) => (forall a. Patch a -> Int) -> Diff syntax ann -> Int