Drop support for GHC-7.8.4

Data/GraphQL/AST.hs

@@ -158,7 +158,7 @@ data InterfaceTypeDefinition = InterfaceTypeDefinition Name [FieldDefinition]
 data UnionTypeDefinition = UnionTypeDefinition Name [NamedType]
                            deriving (Eq,Show)
 
-data ScalarTypeDefinition = ScalarTypeDefinition Name
+newtype ScalarTypeDefinition = ScalarTypeDefinition Name
                             deriving (Eq,Show)
 
 data EnumTypeDefinition = EnumTypeDefinition Name [EnumValueDefinition]

Data/GraphQL/Encoder.hs

@@ -1,12 +1,7 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 -- | This module defines a printer for the @GraphQL@ language.
 module Data.GraphQL.Encoder where
 
-#if !MIN_VERSION_base(4,8,0)
-import Control.Applicative ((<$>))
-import Data.Monoid (Monoid, mconcat, mempty)
-#endif
 import Data.Monoid ((<>))
 
 import Data.Text (Text, cons, intercalate, pack, snoc)

Data/GraphQL/Error.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 module Data.GraphQL.Error (
   parseError,
@@ -15,12 +14,6 @@ import Data.Text (Text, pack)
 
 import Control.Arrow ((&&&))
 
-#if !MIN_VERSION_base(4,8,0)
-import Control.Applicative (Applicative, pure)
-import Data.Foldable (Foldable, concatMap)
-import Prelude hiding (concatMap)
-#endif
-
 -- | Wraps a parse error into a list of errors.
 parseError :: Applicative f => String -> f Aeson.Value
 parseError s =

Data/GraphQL/Execute.hs

@@ -1,11 +1,7 @@
-{-# LANGUAGE CPP #-}
 -- | This module provides the function to execute a @GraphQL@ request --
 --   according to a 'Schema'.
 module Data.GraphQL.Execute (execute) where
 
-#if !MIN_VERSION_base(4,8,0)
-import Control.Applicative ((<$>))
-#endif
 import Control.Applicative (Alternative)
 import Data.Maybe (catMaybes)
 

Data/GraphQL/Parser.hs

@@ -1,14 +1,9 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 -- | This module defines a parser for @GraphQL@ request documents.
 module Data.GraphQL.Parser where
 
 import Prelude hiding (takeWhile)
 
-#if !MIN_VERSION_base(4,8,0)
-import Control.Applicative ((<$>), (<*>), (*>), (<*), (<$), pure)
-import Data.Monoid (Monoid, mempty)
-#endif
 import Control.Applicative ((<|>), empty, many, optional)
 import Control.Monad (when)
 import Data.Char (isDigit, isSpace)

Data/GraphQL/Schema.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE LambdaCase #-}
 -- | This module provides a representation of a @GraphQL@ Schema in addition to
@@ -23,16 +22,8 @@ module Data.GraphQL.Schema
   , Value(..)
   ) where
 
-#if !MIN_VERSION_base(4,8,0)
-import Control.Applicative (pure)
-import Control.Arrow (first)
-import Data.Foldable (foldMap)
-import Data.Traversable (traverse)
-import Data.Monoid (Monoid(mempty,mappend))
-#else
 import Data.Bifunctor (first)
 import Data.Monoid (Alt(Alt,getAlt))
-#endif
 import Control.Applicative (Alternative((<|>), empty))
 import Data.Maybe (catMaybes)
 import Data.Foldable (fold)
@@ -142,11 +133,3 @@ field _ = Nothing
 -- | Returns a list of the 'Field's contained in the given 'SelectionSet'.
 fields :: SelectionSet -> [Field]
 fields = catMaybes . fmap field
-
-#if !MIN_VERSION_base(4,8,0)
-newtype Alt f a = Alt {getAlt :: f a}
-
-instance Alternative f => Monoid (Alt f a) where
-        mempty = Alt empty
-        Alt x `mappend` Alt y = Alt $ x <|> y
-#endif