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config: remove overlapping noise

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This commit is contained in:
Sönke Hahn 2016-01-08 17:25:15 +01:00
parent 3cc3c5c986
commit d99bde5fcd
1 changed files with 5 additions and 11 deletions
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16
servant-server/src/Servant/Server/Internal/Config.hs
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@ -14,9 +14,9 @@
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE UndecidableInstances #-}
#if !MIN_VERSION_base(4,8,0)
{-# LANGUAGE OverlappingInstances #-}
#endif
#include "overlapping-compat.h"
module Servant.Server.Internal.Config where
import Control.DeepSeq (NFData(rnf))
@ -61,16 +61,10 @@ infixr 4 .:
class HasConfigEntry (cfg :: [*]) (a :: k) (val :: *) | cfg a -> val where
getConfigEntry :: proxy a -> Config cfg -> val
instance
#if MIN_VERSION_base(4,8,0)
{-# OVERLAPPABLE #-}
#endif
instance OVERLAPPABLE_
HasConfigEntry xs tag val => HasConfigEntry (notIt ': xs) tag val where
getConfigEntry p (ConsConfig _ xs) = getConfigEntry p xs
instance
#if MIN_VERSION_base(4,8,0)
{-# OVERLAPPABLE #-}
#endif
instance OVERLAPPABLE_
HasConfigEntry (ConfigEntry tag val ': xs) tag val where
getConfigEntry _ (ConsConfig x _) = unConfigEntry x