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removing DerivingVia extension (not compatible ghc < 8.6.1)

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akhesacaro 2021-03-16 19:55:01 +01:00 committed by Gaël Deest
parent 133ed94442
commit 86eb25018e
1 changed files with 3 additions and 2 deletions
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5
doc/cookbook/uverb/UVerb.lhs
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@ -12,7 +12,6 @@ handlers that respond with arbitrary open unions of types.
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DerivingStrategies #-}
{-# LANGUAGE DerivingVia #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
@ -158,7 +157,9 @@ Example usage:
```haskell
data Foo = Foo Int Int Int
deriving (Show, Eq, GHC.Generic, ToJSON)
deriving HasStatus via WithStatus 200 Foo
instance HasStatus Foo where
type StatusOf Foo = 200
data Bar = Bar
deriving (Show, Eq, GHC.Generic, ToJSON)