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Derive Generic instance for Either #57

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Derive Generic instance for Either #57

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1 change: 1 addition & 0 deletions bower.json
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
"purescript-bifunctors": "master",
"purescript-control": "master",
"purescript-foldable-traversable": "master",
"purescript-generics-rep": "master",
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We'll be moving the generics-rep repo's code into prelude, so we can drop the dependency on generics-rep.

"purescript-invariant": "master",
"purescript-maybe": "master",
"purescript-prelude": "master"
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3 changes: 3 additions & 0 deletions src/Data/Either.purs
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Expand Up @@ -12,6 +12,7 @@ import Data.Foldable (class Foldable)
import Data.FoldableWithIndex (class FoldableWithIndex)
import Data.Functor.Invariant (class Invariant, imapF)
import Data.FunctorWithIndex (class FunctorWithIndex)
import Data.Generic.Rep (class Generic)
import Data.Maybe (Maybe(..), maybe, maybe')
import Data.Ord (class Ord1)
import Data.Traversable (class Traversable)
Expand Down Expand Up @@ -40,6 +41,8 @@ derive instance functorEither :: Functor (Either a)
instance functorWithIndexEither :: FunctorWithIndex Unit (Either a) where
mapWithIndex f = map $ f unit

derive instance genericEither :: Generic (Either a b) _

instance invariantEither :: Invariant (Either a) where
imap = imapF

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