47 lines
1.3 KiB
Haskell
47 lines
1.3 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE TypeOperators #-}
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{-# LANGUAGE TypeSynonymInstances #-}
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module Servant.HoistSpec where
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import Data.Aeson
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(ToJSON, encode)
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import Test.Hspec
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(Spec)
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import Servant
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-------------------------------------------------------------------------------
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-- https://github.com/haskell-servant/servant/issues/734
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-------------------------------------------------------------------------------
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-- This didn't fail if executed in GHCi; cannot have as a doctest.
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newtype App a = App a
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type API = Get '[JSON] Int
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:<|> ReqBody '[JSON] String :> Get '[JSON] Bool
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api :: Proxy API
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api = Proxy
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server :: App Int :<|> (String -> App Bool)
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server = undefined
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-- Natural transformation still seems to need an explicit type.
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f :: App a -> App a
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f = id
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server' :: App Int :<|> (String -> App Bool)
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server' = hoistServer api f server
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instance ToJSON a => MimeRender JSON a where mimeRender _ = encode
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-------------------------------------------------------------------------------
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-- Spec
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-------------------------------------------------------------------------------
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spec :: Spec
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spec = return ()
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