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\begin{code}
{-# LANGUAGE KindSignatures #-}
module HsExpr where

import SrcLoc     ( Located )
import Outputable ( SDoc, OutputableBndr )
import {-# SOURCE #-} HsPat  ( LPat )

import Data.Data

-- IA0_NOTE: We need kind annotations because of kind polymorphism
data HsExpr (i :: *)
data HsSplice (i :: *)
data MatchGroup (a :: *)
data GRHSs (a :: *)

instance Typeable1 HsSplice
instance Data i => Data (HsSplice i)
instance Typeable1 HsExpr
instance Data i => Data (HsExpr i)
instance Typeable1 MatchGroup
instance Data i => Data (MatchGroup i)
instance Typeable1 GRHSs
instance Data i => Data (GRHSs i)

type LHsExpr a = Located (HsExpr a)
type SyntaxExpr a = HsExpr a

pprLExpr :: (OutputableBndr i) => 
        LHsExpr i -> SDoc

pprExpr :: (OutputableBndr i) => 
        HsExpr i -> SDoc

pprSplice :: (OutputableBndr i) => 
        HsSplice i -> SDoc

pprPatBind :: (OutputableBndr b, OutputableBndr i) => 
        LPat b -> GRHSs i -> SDoc

pprFunBind :: (OutputableBndr idL, OutputableBndr idR) => 
        idL -> Bool -> MatchGroup idR -> SDoc
\end{code}