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Give an instance of GNewtype1.

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This commit is contained in:
Rob Rix 2018-03-07 19:00:41 -05:00
parent e30a4d3f25
commit f3ace5ca2a
1 changed files with 6 additions and 0 deletions
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6
src/Control/Abstract/Analysis.hs
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@ -12,6 +12,7 @@ import Control.Effect as X
import Control.Monad.Effect.Fail as X
import Control.Monad.Effect.Reader as X
import Control.Monad.Effect.State as X
import Data.Coerce
import Prologue
type family TermFor (m :: * -> *)
@ -48,3 +49,8 @@ class GNewtype1 n where
gpack1 :: GO1 n a -> n a
gunpack1 :: n a -> GO1 n a
instance GNewtype1 (D1 d (C1 c (S1 s (Rec1 a)))) where
type GO1 (D1 d (C1 c (S1 s (Rec1 a)))) = a
gpack1 = coerce
gunpack1 = coerce