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Add Bifunctor instance for ReqResult #123

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Add Bifunctor instance for ReqResult #123

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9 changes: 8 additions & 1 deletion src/Servant/Common/Req.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ import Control.Arrow ((&&&))
import Control.Concurrent
import Control.Monad (join)
import Control.Monad.IO.Class (MonadIO, liftIO)
import Data.Bifunctor (first)
import Data.Bifunctor (Bifunctor(..))
import qualified Data.ByteString.Builder as Builder
import qualified Data.ByteString.Lazy.Char8 as BL
import Data.ByteString (ByteString)
Expand Down Expand Up @@ -52,6 +52,13 @@ data ReqResult tag a
-- ^ A failure to construct the request tagged with 'tag' at trigger time
deriving (Functor)

instance Bifunctor ReqResult where
first f = \case
ResponseSuccess tag a r -> ResponseSuccess (f tag) a r
ResponseFailure tag t r -> ResponseFailure (f tag) t r
RequestFailure tag t -> RequestFailure (f tag) t
second = fmap

data ClientOptions = ClientOptions
{ optsRequestFixup :: forall a. Show a => XhrRequest a -> JSM (XhrRequest a)
-- ^ Aribtrarily modify requests just before they are sent.
Expand Down