    {-# LANGUAGE CPP #-}

    -----------------------------------------------------------------------------
    --
    -- (c) The University of Glasgow 2006
    --
    -- The purpose of this module is to transform an HsExpr into a CoreExpr which
    -- when evaluated, returns a (Meta.Q Meta.Exp) computation analogous to the
    -- input HsExpr. We do this in the DsM monad, which supplies access to
    -- CoreExpr's of the "smart constructors" of the Meta.Exp datatype.
    --
    -- It also defines a bunch of knownKeyNames, in the same way as is done
    -- in prelude/PrelNames.  It's much more convenient to do it here, because
    -- otherwise we have to recompile PrelNames whenever we add a Name, which is
    -- a Royal Pain (triggers other recompilation).
    -----------------------------------------------------------------------------

    module DsMeta( dsBracket,
                   templateHaskellNames, qTyConName, nameTyConName,
                   liftName, liftStringName, expQTyConName, patQTyConName,
                   decQTyConName, decsQTyConName, typeQTyConName,
                   decTyConName, typeTyConName, mkNameG_dName, mkNameG_vName, mkNameG_tcName,
                   quoteExpName, quotePatName, quoteDecName, quoteTypeName,
                   tExpTyConName, tExpDataConName, unTypeName, unTypeQName,
                   unsafeTExpCoerceName
                    ) where

    #include "HsVersions.h"

    import {-# SOURCE #-}   DsExpr ( dsExpr )

    import MatchLit
    import DsMonad

    import qualified Language.Haskell.TH as TH

    import HsSyn
    import Class
    import PrelNames
    -- To avoid clashes with DsMeta.varName we must make a local alias for
    -- OccName.varName we do this by removing varName from the import of
    -- OccName above, making a qualified instance of OccName and using
    -- OccNameAlias.varName where varName ws previously used in this file.
    import qualified OccName( isDataOcc, isVarOcc, isTcOcc, varName, tcName, dataName )

    import Module
    import Id
    import Name hiding( isVarOcc, isTcOcc, varName, tcName )
    import NameEnv
    import TcType
    import TyCon
    import TysWiredIn
    import TysPrim ( liftedTypeKindTyConName, constraintKindTyConName )
    import CoreSyn
    import MkCore
    import CoreUtils
    import SrcLoc
    import Unique
    import BasicTypes
    import Outputable
    import Bag
    import DynFlags
    import FastString
    import ForeignCall
    import Util
    import MonadUtils

    import Data.Maybe
    import Control.Monad
    import Data.List

    -----------------------------------------------------------------------------
    dsBracket :: HsBracket Name -> [PendingTcSplice] -> DsM CoreExpr
    -- Returns a CoreExpr of type TH.ExpQ
    -- The quoted thing is parameterised over Name, even though it has
    -- been type checked.  We don't want all those type decorations!

    dsBracket brack splices
      = dsExtendMetaEnv new_bit (do_brack brack)
      where
        new_bit = mkNameEnv [(n, DsSplice (unLoc e)) | PendSplice n e <- splices]

        do_brack (VarBr _ n) = do { MkC e1  <- lookupOcc n ; return e1 }
        do_brack (ExpBr e)   = do { MkC e1  <- repLE e     ; return e1 }
        do_brack (PatBr p)   = do { MkC p1  <- repTopP p   ; return p1 }
        do_brack (TypBr t)   = do { MkC t1  <- repLTy t    ; return t1 }
        do_brack (DecBrG gp) = do { MkC ds1 <- repTopDs gp ; return ds1 }
        do_brack (DecBrL _)  = panic "dsBracket: unexpected DecBrL"
        do_brack (TExpBr e)  = do { MkC e1  <- repLE e     ; return e1 }

    {- -------------- Examples --------------------

      [| \x -> x |]
    ====>
      gensym (unpackString "x"#) `bindQ` \ x1::String ->
      lam (pvar x1) (var x1)

      [| \x -> $(f [| x |]) |]
    ====>
      gensym (unpackString "x"#) `bindQ` \ x1::String ->
      lam (pvar x1) (f (var x1))
    -}

    -------------------------------------------------------
    --                      Declarations
    -------------------------------------------------------

    repTopP :: LPat Name -> DsM (Core TH.PatQ)
    repTopP pat = do { ss <- mkGenSyms (collectPatBinders pat)
                     ; pat' <- addBinds ss (repLP pat)
                     ; wrapGenSyms ss pat' }

    repTopDs :: HsGroup Name -> DsM (Core (TH.Q [TH.Dec]))
    repTopDs group@(HsGroup { hs_valds   = valds
                            , hs_splcds  = splcds
                            , hs_tyclds  = tyclds
                            , hs_instds  = instds
                            , hs_derivds = derivds
                            , hs_fixds   = fixds
                            , hs_defds   = defds
                            , hs_fords   = fords
                            , hs_warnds  = warnds
                            , hs_annds   = annds
                            , hs_ruleds  = ruleds
                            , hs_vects   = vects
                            , hs_docs    = docs })
     = do { let { tv_bndrs = hsSigTvBinders valds
                ; bndrs = tv_bndrs ++ hsGroupBinders group } ;
            ss <- mkGenSyms bndrs ;

            -- Bind all the names mainly to avoid repeated use of explicit strings.
            -- Thus we get
            --      do { t :: String <- genSym "T" ;
            --           return (Data t [] ...more t's... }
            -- The other important reason is that the output must mention
            -- only "T", not "Foo:T" where Foo is the current module

            decls <- addBinds ss (
                      do { val_ds   <- rep_val_binds valds
                         ; _        <- mapM no_splice splcds
                         ; tycl_ds  <- mapM repTyClD (tyClGroupConcat tyclds)
                         ; role_ds  <- mapM repRoleD (concatMap group_roles tyclds)
                         ; inst_ds  <- mapM repInstD instds
                         ; deriv_ds <- mapM repStandaloneDerivD derivds
                         ; fix_ds   <- mapM repFixD fixds
                         ; _        <- mapM no_default_decl defds
                         ; for_ds   <- mapM repForD fords
                         ; _        <- mapM no_warn (concatMap (wd_warnings . unLoc)
                                                               warnds)
                         ; ann_ds   <- mapM repAnnD annds
                         ; rule_ds  <- mapM repRuleD (concatMap (rds_rules . unLoc)
                                                                ruleds)
                         ; _        <- mapM no_vect vects
                         ; _        <- mapM no_doc docs

                            -- more needed
                         ;  return (de_loc $ sort_by_loc $
                                    val_ds ++ catMaybes tycl_ds ++ role_ds
                                           ++ (concat fix_ds)
                                           ++ inst_ds ++ rule_ds ++ for_ds
                                           ++ ann_ds ++ deriv_ds) }) ;

            decl_ty <- lookupType decQTyConName ;
            let { core_list = coreList' decl_ty decls } ;

            dec_ty <- lookupType decTyConName ;
            q_decs  <- repSequenceQ dec_ty core_list ;

            wrapGenSyms ss q_decs
          }
      where
        no_splice (L loc _)
          = notHandledL loc "Splices within declaration brackets" empty
        no_default_decl (L loc decl)
          = notHandledL loc "Default declarations" (ppr decl)
        no_warn (L loc (Warning thing _))
          = notHandledL loc "WARNING and DEPRECATION pragmas" $
                        text "Pragma for declaration of" <+> ppr thing
        no_vect (L loc decl)
          = notHandledL loc "Vectorisation pragmas" (ppr decl)
        no_doc (L loc _)
          = notHandledL loc "Haddock documentation" empty

    hsSigTvBinders :: HsValBinds Name -> [Name]
    -- See Note [Scoped type variables in bindings]
    hsSigTvBinders binds
      = [hsLTyVarName tv | L _ (TypeSig _ (L _ (HsForAllTy Explicit _ qtvs _ _)) _) <- sigs
                         , tv <- hsQTvBndrs qtvs]
      where
        sigs = case binds of
                 ValBindsIn  _ sigs -> sigs
                 ValBindsOut _ sigs -> sigs

    {- Notes

    Note [Scoped type variables in bindings]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Consider
       f :: forall a. a -> a
       f x = x::a
    Here the 'forall a' brings 'a' into scope over the binding group.
    To achieve this we

      a) Gensym a binding for 'a' at the same time as we do one for 'f'
         collecting the relevant binders with hsSigTvBinders

      b) When processing the 'forall', don't gensym

    The relevant places are signposted with references to this Note

    Note [Binders and occurrences]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    When we desugar [d| data T = MkT |]
    we want to get
            Data "T" [] [Con "MkT" []] []
    and *not*
            Data "Foo:T" [] [Con "Foo:MkT" []] []
    That is, the new data decl should fit into whatever new module it is
    asked to fit in.   We do *not* clone, though; no need for this:
            Data "T79" ....

    But if we see this:
            data T = MkT
            foo = reifyDecl T

    then we must desugar to
            foo = Data "Foo:T" [] [Con "Foo:MkT" []] []

    So in repTopDs we bring the binders into scope with mkGenSyms and addBinds.
    And we use lookupOcc, rather than lookupBinder
    in repTyClD and repC.

    -}

    -- represent associated family instances
    --
    repTyClD :: LTyClDecl Name -> DsM (Maybe (SrcSpan, Core TH.DecQ))

    repTyClD (L loc (FamDecl { tcdFam = fam })) = liftM Just $ repFamilyDecl (L loc fam)

    repTyClD (L loc (SynDecl { tcdLName = tc, tcdTyVars = tvs, tcdRhs = rhs }))
      = do { tc1 <- lookupLOcc tc           -- See note [Binders and occurrences]
           ; dec <- addTyClTyVarBinds tvs $ \bndrs ->
                    repSynDecl tc1 bndrs rhs
           ; return (Just (loc, dec)) }

    repTyClD (L loc (DataDecl { tcdLName = tc, tcdTyVars = tvs, tcdDataDefn = defn }))
      = do { tc1 <- lookupLOcc tc           -- See note [Binders and occurrences]
           ; tc_tvs <- mk_extra_tvs tc tvs defn
           ; dec <- addTyClTyVarBinds tc_tvs $ \bndrs ->
                    repDataDefn tc1 bndrs Nothing (hsLTyVarNames tc_tvs) defn
           ; return (Just (loc, dec)) }

    repTyClD (L loc (ClassDecl { tcdCtxt = cxt, tcdLName = cls,
                                 tcdTyVars = tvs, tcdFDs = fds,
                                 tcdSigs = sigs, tcdMeths = meth_binds,
                                 tcdATs = ats, tcdATDefs = [] }))
      = do { cls1 <- lookupLOcc cls         -- See note [Binders and occurrences]
           ; dec  <- addTyVarBinds tvs $ \bndrs ->
               do { cxt1   <- repLContext cxt
                  ; sigs1  <- rep_sigs sigs
                  ; binds1 <- rep_binds meth_binds
                  ; fds1   <- repLFunDeps fds
                  ; ats1   <- repFamilyDecls ats
                  ; decls1 <- coreList decQTyConName (ats1 ++ sigs1 ++ binds1)
                  ; repClass cxt1 cls1 bndrs fds1 decls1
                  }
           ; return $ Just (loc, dec)
           }

    -- Un-handled cases
    repTyClD (L loc d) = putSrcSpanDs loc $
                         do { warnDs (hang ds_msg 4 (ppr d))
                            ; return Nothing }

    -------------------------
    repRoleD :: LRoleAnnotDecl Name -> DsM (SrcSpan, Core TH.DecQ)
    repRoleD (L loc (RoleAnnotDecl tycon roles))
      = do { tycon1 <- lookupLOcc tycon
           ; roles1 <- mapM repRole roles
           ; roles2 <- coreList roleTyConName roles1
           ; dec <- repRoleAnnotD tycon1 roles2
           ; return (loc, dec) }

    -------------------------
    repDataDefn :: Core TH.Name -> Core [TH.TyVarBndr]
                -> Maybe (Core [TH.TypeQ])
                -> [Name] -> HsDataDefn Name
                -> DsM (Core TH.DecQ)
    repDataDefn tc bndrs opt_tys tv_names
              (HsDataDefn { dd_ND = new_or_data, dd_ctxt = cxt
                          , dd_cons = cons, dd_derivs = mb_derivs })
      = do { cxt1     <- repLContext cxt
           ; derivs1  <- repDerivs mb_derivs
           ; case new_or_data of
               NewType  -> do { con1 <- repC tv_names (head cons)
                              ; case con1 of
                                 [c] -> repNewtype cxt1 tc bndrs opt_tys c derivs1
                                 _cs -> failWithDs (ptext
                                         (sLit "Multiple constructors for newtype:")
                                          <+> pprQuotedList
                                                    (con_names $ unLoc $ head cons))
                              }
               DataType -> do { consL <- concatMapM (repC tv_names) cons
                              ; cons1 <- coreList conQTyConName consL
                              ; repData cxt1 tc bndrs opt_tys cons1 derivs1 } }

    repSynDecl :: Core TH.Name -> Core [TH.TyVarBndr]
              -> LHsType Name
              -> DsM (Core TH.DecQ)
    repSynDecl tc bndrs ty
      = do { ty1 <- repLTy ty
           ; repTySyn tc bndrs ty1 }

    repFamilyDecl :: LFamilyDecl Name -> DsM (SrcSpan, Core TH.DecQ)
    repFamilyDecl (L loc (FamilyDecl { fdInfo    = info,
                                       fdLName   = tc,
                                       fdTyVars  = tvs,
                                       fdKindSig = opt_kind }))
      = do { tc1 <- lookupLOcc tc           -- See note [Binders and occurrences]
           ; dec <- addTyClTyVarBinds tvs $ \bndrs ->
               case (opt_kind, info) of
                      (Nothing, ClosedTypeFamily eqns) ->
                        do { eqns1 <- mapM repTyFamEqn eqns
                           ; eqns2 <- coreList tySynEqnQTyConName eqns1
                           ; repClosedFamilyNoKind tc1 bndrs eqns2 }
                      (Just ki, ClosedTypeFamily eqns) ->
                        do { eqns1 <- mapM repTyFamEqn eqns
                           ; eqns2 <- coreList tySynEqnQTyConName eqns1
                           ; ki1 <- repLKind ki
                           ; repClosedFamilyKind tc1 bndrs ki1 eqns2 }
                      (Nothing, _) ->
                        do { info' <- repFamilyInfo info
                           ; repFamilyNoKind info' tc1 bndrs }
                      (Just ki, _) ->
                        do { info' <- repFamilyInfo info
                           ; ki1 <- repLKind ki
                           ; repFamilyKind info' tc1 bndrs ki1 }
           ; return (loc, dec)
           }

    repFamilyDecls :: [LFamilyDecl Name] -> DsM [Core TH.DecQ]
    repFamilyDecls fds = liftM de_loc (mapM repFamilyDecl fds)

    -------------------------
    mk_extra_tvs :: Located Name -> LHsTyVarBndrs Name
                 -> HsDataDefn Name -> DsM (LHsTyVarBndrs Name)
    -- If there is a kind signature it must be of form
    --    k1 -> .. -> kn -> *
    -- Return type variables [tv1:k1, tv2:k2, .., tvn:kn]
    mk_extra_tvs tc tvs defn
      | HsDataDefn { dd_kindSig = Just hs_kind } <- defn
      = do { extra_tvs <- go hs_kind
           ; return (tvs { hsq_tvs = hsq_tvs tvs ++ extra_tvs }) }
      | otherwise
      = return tvs
      where
        go :: LHsKind Name -> DsM [LHsTyVarBndr Name]
        go (L loc (HsFunTy kind rest))
          = do { uniq <- newUnique
               ; let { occ = mkTyVarOccFS (fsLit "t")
                     ; nm = mkInternalName uniq occ loc
                     ; hs_tv = L loc (KindedTyVar (noLoc nm) kind) }
               ; hs_tvs <- go rest
               ; return (hs_tv : hs_tvs) }

        go (L _ (HsTyVar n))
          | n == liftedTypeKindTyConName
          = return []

        go _ = failWithDs (ptext (sLit "Malformed kind signature for") <+> ppr tc)

    -------------------------
    -- represent fundeps
    --
    repLFunDeps :: [Located (FunDep (Located Name))] -> DsM (Core [TH.FunDep])
    repLFunDeps fds = repList funDepTyConName repLFunDep fds

    repLFunDep :: Located (FunDep (Located Name)) -> DsM (Core TH.FunDep)
    repLFunDep (L _ (xs, ys))
       = do xs' <- repList nameTyConName (lookupBinder . unLoc) xs
            ys' <- repList nameTyConName (lookupBinder . unLoc) ys
            repFunDep xs' ys'

    -- represent family declaration flavours
    --
    repFamilyInfo :: FamilyInfo Name -> DsM (Core TH.FamFlavour)
    repFamilyInfo OpenTypeFamily      = rep2 typeFamName []
    repFamilyInfo DataFamily          = rep2 dataFamName []
    repFamilyInfo ClosedTypeFamily {} = panic "repFamilyInfo"

    -- Represent instance declarations
    --
    repInstD :: LInstDecl Name -> DsM (SrcSpan, Core TH.DecQ)
    repInstD (L loc (TyFamInstD { tfid_inst = fi_decl }))
      = do { dec <- repTyFamInstD fi_decl
           ; return (loc, dec) }
    repInstD (L loc (DataFamInstD { dfid_inst = fi_decl }))
      = do { dec <- repDataFamInstD fi_decl
           ; return (loc, dec) }
    repInstD (L loc (ClsInstD { cid_inst = cls_decl }))
      = do { dec <- repClsInstD cls_decl
           ; return (loc, dec) }

    repClsInstD :: ClsInstDecl Name -> DsM (Core TH.DecQ)
    repClsInstD (ClsInstDecl { cid_poly_ty = ty, cid_binds = binds
                             , cid_sigs = prags, cid_tyfam_insts = ats
                             , cid_datafam_insts = adts })
      = addTyVarBinds tvs $ \_ ->
                -- We must bring the type variables into scope, so their
                -- occurrences don't fail, even though the binders don't
                -- appear in the resulting data structure
                --
                -- But we do NOT bring the binders of 'binds' into scope
                -- because they are properly regarded as occurrences
                -- For example, the method names should be bound to
                -- the selector Ids, not to fresh names (Trac #5410)
                --
                do { cxt1 <- repContext cxt
                   ; cls_tcon <- repTy (HsTyVar (unLoc cls))
                   ; cls_tys <- repLTys tys
                   ; inst_ty1 <- repTapps cls_tcon cls_tys
                   ; binds1 <- rep_binds binds
                   ; prags1 <- rep_sigs prags
                   ; ats1 <- mapM (repTyFamInstD . unLoc) ats
                   ; adts1 <- mapM (repDataFamInstD . unLoc) adts
                   ; decls <- coreList decQTyConName (ats1 ++ adts1 ++ binds1 ++ prags1)
                   ; repInst cxt1 inst_ty1 decls }
     where
       Just (tvs, cxt, cls, tys) = splitLHsInstDeclTy_maybe ty

    repStandaloneDerivD :: LDerivDecl Name -> DsM (SrcSpan, Core TH.DecQ)
    repStandaloneDerivD (L loc (DerivDecl { deriv_type = ty }))
      = do { dec <- addTyVarBinds tvs $ \_ ->
                    do { cxt' <- repContext cxt
                       ; cls_tcon <- repTy (HsTyVar (unLoc cls))
                       ; cls_tys <- repLTys tys
                       ; inst_ty <- repTapps cls_tcon cls_tys
                       ; repDeriv cxt' inst_ty }
           ; return (loc, dec) }
      where
        Just (tvs, cxt, cls, tys) = splitLHsInstDeclTy_maybe ty

    repTyFamInstD :: TyFamInstDecl Name -> DsM (Core TH.DecQ)
    repTyFamInstD decl@(TyFamInstDecl { tfid_eqn = eqn })
      = do { let tc_name = tyFamInstDeclLName decl
           ; tc <- lookupLOcc tc_name               -- See note [Binders and occurrences]
           ; eqn1 <- repTyFamEqn eqn
           ; repTySynInst tc eqn1 }

    repTyFamEqn :: LTyFamInstEqn Name -> DsM (Core TH.TySynEqnQ)
    repTyFamEqn (L loc (TyFamEqn { tfe_pats = HsWB { hswb_cts = tys
                                                   , hswb_kvs = kv_names
                                                   , hswb_tvs = tv_names }
                                     , tfe_rhs = rhs }))
      = do { let hs_tvs = HsQTvs { hsq_kvs = kv_names
                                 , hsq_tvs = userHsTyVarBndrs loc tv_names }   -- Yuk
           ; addTyClTyVarBinds hs_tvs $ \ _ ->
             do { tys1 <- repLTys tys
                ; tys2 <- coreList typeQTyConName tys1
                ; rhs1 <- repLTy rhs
                ; repTySynEqn tys2 rhs1 } }

    repDataFamInstD :: DataFamInstDecl Name -> DsM (Core TH.DecQ)
    repDataFamInstD (DataFamInstDecl { dfid_tycon = tc_name
                                     , dfid_pats = HsWB { hswb_cts = tys, hswb_kvs = kv_names, hswb_tvs = tv_names }
                                     , dfid_defn = defn })
      = do { tc <- lookupLOcc tc_name               -- See note [Binders and occurrences]
           ; let loc = getLoc tc_name
                 hs_tvs = HsQTvs { hsq_kvs = kv_names, hsq_tvs = userHsTyVarBndrs loc tv_names }   -- Yuk
           ; addTyClTyVarBinds hs_tvs $ \ bndrs ->
             do { tys1 <- repList typeQTyConName repLTy tys
                ; repDataDefn tc bndrs (Just tys1) tv_names defn } }

    repForD :: Located (ForeignDecl Name) -> DsM (SrcSpan, Core TH.DecQ)
    repForD (L loc (ForeignImport name typ _ (CImport (L _ cc) (L _ s) mch cis _)))
     = do MkC name' <- lookupLOcc name
          MkC typ' <- repLTy typ
          MkC cc' <- repCCallConv cc
          MkC s' <- repSafety s
          cis' <- conv_cimportspec cis
          MkC str <- coreStringLit (static ++ chStr ++ cis')
          dec <- rep2 forImpDName [cc', s', str, name', typ']
          return (loc, dec)
     where
        conv_cimportspec (CLabel cls) = notHandled "Foreign label" (doubleQuotes (ppr cls))
        conv_cimportspec (CFunction DynamicTarget) = return "dynamic"
        conv_cimportspec (CFunction (StaticTarget fs _ True)) = return (unpackFS fs)
        conv_cimportspec (CFunction (StaticTarget _  _ False)) = panic "conv_cimportspec: values not supported yet"
        conv_cimportspec CWrapper = return "wrapper"
        -- these calling conventions do not support headers and the static keyword
        raw_cconv = cc == PrimCallConv || cc == JavaScriptCallConv
        static = case cis of
                     CFunction (StaticTarget _ _ _) | not raw_cconv -> "static "
                     _ -> ""
        chStr = case mch of
                Just (Header h) | not raw_cconv -> unpackFS h ++ " "
                _ -> ""
    repForD decl = notHandled "Foreign declaration" (ppr decl)

    repCCallConv :: CCallConv -> DsM (Core TH.Callconv)
    repCCallConv CCallConv          = rep2 cCallName []
    repCCallConv StdCallConv        = rep2 stdCallName []
    repCCallConv CApiConv           = rep2 cApiCallName []
    repCCallConv PrimCallConv       = rep2 primCallName []
    repCCallConv JavaScriptCallConv = rep2 javaScriptCallName []

    repSafety :: Safety -> DsM (Core TH.Safety)
    repSafety PlayRisky = rep2 unsafeName []
    repSafety PlayInterruptible = rep2 interruptibleName []
    repSafety PlaySafe = rep2 safeName []

    repFixD :: LFixitySig Name -> DsM [(SrcSpan, Core TH.DecQ)]
    repFixD (L loc (FixitySig names (Fixity prec dir)))
      = do { MkC prec' <- coreIntLit prec
           ; let rep_fn = case dir of
                            InfixL -> infixLDName
                            InfixR -> infixRDName
                            InfixN -> infixNDName
           ; let do_one name
                  = do { MkC name' <- lookupLOcc name
                       ; dec <- rep2 rep_fn [prec', name']
                       ; return (loc,dec) }
           ; mapM do_one names }

    repRuleD :: LRuleDecl Name -> DsM (SrcSpan, Core TH.DecQ)
    repRuleD (L loc (HsRule n act bndrs lhs _ rhs _))
      = do { let bndr_names = concatMap ruleBndrNames bndrs
           ; ss <- mkGenSyms bndr_names
           ; rule1 <- addBinds ss $
                      do { bndrs' <- repList ruleBndrQTyConName repRuleBndr bndrs
                         ; n'   <- coreStringLit $ unpackFS $ unLoc n
                         ; act' <- repPhases act
                         ; lhs' <- repLE lhs
                         ; rhs' <- repLE rhs
                         ; repPragRule n' bndrs' lhs' rhs' act' }
           ; rule2 <- wrapGenSyms ss rule1
           ; return (loc, rule2) }

    ruleBndrNames :: LRuleBndr Name -> [Name]
    ruleBndrNames (L _ (RuleBndr n))      = [unLoc n]
    ruleBndrNames (L _ (RuleBndrSig n (HsWB { hswb_kvs = kvs, hswb_tvs = tvs })))
      = unLoc n : kvs ++ tvs

    repRuleBndr :: LRuleBndr Name -> DsM (Core TH.RuleBndrQ)
    repRuleBndr (L _ (RuleBndr n))
      = do { MkC n' <- lookupLBinder n
           ; rep2 ruleVarName [n'] }
    repRuleBndr (L _ (RuleBndrSig n (HsWB { hswb_cts = ty })))
      = do { MkC n'  <- lookupLBinder n
           ; MkC ty' <- repLTy ty
           ; rep2 typedRuleVarName [n', ty'] }

    repAnnD :: LAnnDecl Name -> DsM (SrcSpan, Core TH.DecQ)
    repAnnD (L loc (HsAnnotation _ ann_prov (L _ exp)))
      = do { target <- repAnnProv ann_prov
           ; exp'   <- repE exp
           ; dec    <- repPragAnn target exp'
           ; return (loc, dec) }

    repAnnProv :: AnnProvenance Name -> DsM (Core TH.AnnTarget)
    repAnnProv (ValueAnnProvenance (L _ n))
      = do { MkC n' <- globalVar n  -- ANNs are allowed only at top-level
           ; rep2 valueAnnotationName [ n' ] }
    repAnnProv (TypeAnnProvenance (L _ n))
      = do { MkC n' <- globalVar n
           ; rep2 typeAnnotationName [ n' ] }
    repAnnProv ModuleAnnProvenance
      = rep2 moduleAnnotationName []

    ds_msg :: SDoc
    ds_msg = ptext (sLit "Cannot desugar this Template Haskell declaration:")

    -------------------------------------------------------
    --                      Constructors
    -------------------------------------------------------

    repC :: [Name] -> LConDecl Name -> DsM [Core TH.ConQ]
    repC _ (L _ (ConDecl { con_names = con, con_qvars = con_tvs, con_cxt = L _ []
                         , con_details = details, con_res = ResTyH98 }))
      | null (hsQTvBndrs con_tvs)
      = do { con1 <- mapM lookupLOcc con       -- See Note [Binders and occurrences]
           ; mapM (\c -> repConstr c details) con1  }

    repC tvs (L _ (ConDecl { con_names = cons
                           , con_qvars = con_tvs, con_cxt = L _ ctxt
                           , con_details = details
                           , con_res = res_ty }))
      = do { (eq_ctxt, con_tv_subst) <- mkGadtCtxt tvs res_ty
           ; let ex_tvs = HsQTvs { hsq_kvs = filterOut (in_subst con_tv_subst) (hsq_kvs con_tvs)
                                 , hsq_tvs = filterOut (in_subst con_tv_subst . hsLTyVarName) (hsq_tvs con_tvs) }

           ; binds <- mapM dupBinder con_tv_subst
           ; b <- dsExtendMetaEnv (mkNameEnv binds) $ -- Binds some of the con_tvs
             addTyVarBinds ex_tvs $ \ ex_bndrs ->   -- Binds the remaining con_tvs
        do { cons1     <- mapM lookupLOcc cons -- See Note [Binders and occurrences]
           ; c'        <- mapM (\c -> repConstr c details) cons1
           ; ctxt'     <- repContext (eq_ctxt ++ ctxt)
           ; rep2 forallCName ([unC ex_bndrs, unC ctxt'] ++ (map unC c')) }
        ; return [b]
        }

    in_subst :: [(Name,Name)] -> Name -> Bool
    in_subst []          _ = False
    in_subst ((n',_):ns) n = n==n' || in_subst ns n

    mkGadtCtxt :: [Name]            -- Tyvars of the data type
               -> ResType (LHsType Name)
               -> DsM (HsContext Name, [(Name,Name)])
    -- Given a data type in GADT syntax, figure out the equality
    -- context, so that we can represent it with an explicit
    -- equality context, because that is the only way to express
    -- the GADT in TH syntax
    --
    -- Example:
    -- data T a b c where { MkT :: forall d e. d -> e -> T d [e] e
    --     mkGadtCtxt [a,b,c] [d,e] (T d [e] e)
    --   returns
    --     (b~[e], c~e), [d->a]
    --
    -- This function is fiddly, but not really hard
    mkGadtCtxt _ ResTyH98
      = return ([], [])
    mkGadtCtxt data_tvs (ResTyGADT _ res_ty)
      | Just (_, tys) <- hsTyGetAppHead_maybe res_ty
      , data_tvs `equalLength` tys
      = return (go [] [] (data_tvs `zip` tys))

      | otherwise
      = failWithDs (ptext (sLit "Malformed constructor result type:") <+> ppr res_ty)
      where
        go cxt subst [] = (cxt, subst)
        go cxt subst ((data_tv, ty) : rest)
           | Just con_tv <- is_hs_tyvar ty
           , isTyVarName con_tv
           , not (in_subst subst con_tv)
           = go cxt ((con_tv, data_tv) : subst) rest
           | otherwise
           = go (eq_pred : cxt) subst rest
           where
             loc = getLoc ty
             eq_pred = L loc (HsEqTy (L loc (HsTyVar data_tv)) ty)

        is_hs_tyvar (L _ (HsTyVar n))  = Just n   -- Type variables *and* tycons
        is_hs_tyvar (L _ (HsParTy ty)) = is_hs_tyvar ty
        is_hs_tyvar _                  = Nothing

    repBangTy :: LBangType Name -> DsM (Core (TH.StrictTypeQ))
    repBangTy ty= do
      MkC s <- rep2 str []
      MkC t <- repLTy ty'
      rep2 strictTypeName [s, t]
      where
        (str, ty') = case ty of
             L _ (HsBangTy (HsSrcBang _ (Just True) True) ty) -> (unpackedName,  ty)
             L _ (HsBangTy (HsSrcBang _ _     True) ty)       -> (isStrictName,  ty)
             _                                                -> (notStrictName, ty)

    -------------------------------------------------------
    --                      Deriving clause
    -------------------------------------------------------

    repDerivs :: Maybe (Located [LHsType Name]) -> DsM (Core [TH.Name])
    repDerivs Nothing = coreList nameTyConName []
    repDerivs (Just (L _ ctxt))
      = repList nameTyConName rep_deriv ctxt
      where
        rep_deriv :: LHsType Name -> DsM (Core TH.Name)
            -- Deriving clauses must have the simple H98 form
        rep_deriv ty
          | Just (cls, []) <- splitHsClassTy_maybe (unLoc ty)
          = lookupOcc cls
          | otherwise
          = notHandled "Non-H98 deriving clause" (ppr ty)

    -------------------------------------------------------
    --   Signatures in a class decl, or a group of bindings
    -------------------------------------------------------

    rep_sigs :: [LSig Name] -> DsM [Core TH.DecQ]
    rep_sigs sigs = do locs_cores <- rep_sigs' sigs
                       return $ de_loc $ sort_by_loc locs_cores

    rep_sigs' :: [LSig Name] -> DsM [(SrcSpan, Core TH.DecQ)]
            -- We silently ignore ones we don't recognise
    rep_sigs' sigs = do { sigs1 <- mapM rep_sig sigs ;
                         return (concat sigs1) }

    rep_sig :: LSig Name -> DsM [(SrcSpan, Core TH.DecQ)]
    rep_sig (L loc (TypeSig nms ty _))    = mapM (rep_ty_sig sigDName loc ty) nms
    rep_sig (L _   (PatSynSig {}))        = notHandled "Pattern type signatures" empty
    rep_sig (L loc (GenericSig nms ty))   = mapM (rep_ty_sig defaultSigDName loc ty) nms
    rep_sig d@(L _ (IdSig {}))            = pprPanic "rep_sig IdSig" (ppr d)
    rep_sig (L _   (FixSig {}))           = return [] -- fixity sigs at top level
    rep_sig (L loc (InlineSig nm ispec))  = rep_inline nm ispec loc
    rep_sig (L loc (SpecSig nm tys ispec))
       = concatMapM (\t -> rep_specialise nm t ispec loc) tys
    rep_sig (L loc (SpecInstSig _ ty))    = rep_specialiseInst ty loc
    rep_sig (L _   (MinimalSig {}))       = notHandled "MINIMAL pragmas" empty

    rep_ty_sig :: Name -> SrcSpan -> LHsType Name -> Located Name
               -> DsM (SrcSpan, Core TH.DecQ)
    rep_ty_sig mk_sig loc (L _ ty) nm
      = do { nm1 <- lookupLOcc nm
           ; ty1 <- rep_ty ty
           ; sig <- repProto mk_sig nm1 ty1
           ; return (loc, sig) }
      where
        -- We must special-case the top-level explicit for-all of a TypeSig
        -- See Note [Scoped type variables in bindings]
        rep_ty (HsForAllTy Explicit _ tvs ctxt ty)
          = do { let rep_in_scope_tv tv = do { name <- lookupBinder (hsLTyVarName tv)
                                             ; repTyVarBndrWithKind tv name }
               ; bndrs1 <- repList tyVarBndrTyConName rep_in_scope_tv (hsQTvBndrs tvs)
               ; ctxt1  <- repLContext ctxt
               ; ty1    <- repLTy ty
               ; repTForall bndrs1 ctxt1 ty1 }

        rep_ty ty = repTy ty

    rep_inline :: Located Name
               -> InlinePragma      -- Never defaultInlinePragma
               -> SrcSpan
               -> DsM [(SrcSpan, Core TH.DecQ)]
    rep_inline nm ispec loc
      = do { nm1    <- lookupLOcc nm
           ; inline <- repInline $ inl_inline ispec
           ; rm     <- repRuleMatch $ inl_rule ispec
           ; phases <- repPhases $ inl_act ispec
           ; pragma <- repPragInl nm1 inline rm phases
           ; return [(loc, pragma)]
           }

    rep_specialise :: Located Name -> LHsType Name -> InlinePragma -> SrcSpan
                   -> DsM [(SrcSpan, Core TH.DecQ)]
    rep_specialise nm ty ispec loc
      = do { nm1 <- lookupLOcc nm
           ; ty1 <- repLTy ty
           ; phases <- repPhases $ inl_act ispec
           ; let inline = inl_inline ispec
           ; pragma <- if isEmptyInlineSpec inline
                       then -- SPECIALISE
                         repPragSpec nm1 ty1 phases
                       else -- SPECIALISE INLINE
                         do { inline1 <- repInline inline
                            ; repPragSpecInl nm1 ty1 inline1 phases }
           ; return [(loc, pragma)]
           }

    rep_specialiseInst :: LHsType Name -> SrcSpan -> DsM [(SrcSpan, Core TH.DecQ)]
    rep_specialiseInst ty loc
      = do { ty1    <- repLTy ty
           ; pragma <- repPragSpecInst ty1
           ; return [(loc, pragma)] }

    repInline :: InlineSpec -> DsM (Core TH.Inline)
    repInline NoInline  = dataCon noInlineDataConName
    repInline Inline    = dataCon inlineDataConName
    repInline Inlinable = dataCon inlinableDataConName
    repInline spec      = notHandled "repInline" (ppr spec)

    repRuleMatch :: RuleMatchInfo -> DsM (Core TH.RuleMatch)
    repRuleMatch ConLike = dataCon conLikeDataConName
    repRuleMatch FunLike = dataCon funLikeDataConName

    repPhases :: Activation -> DsM (Core TH.Phases)
    repPhases (ActiveBefore i) = do { MkC arg <- coreIntLit i
                                    ; dataCon' beforePhaseDataConName [arg] }
    repPhases (ActiveAfter i)  = do { MkC arg <- coreIntLit i
                                    ; dataCon' fromPhaseDataConName [arg] }
    repPhases _                = dataCon allPhasesDataConName

    -------------------------------------------------------
    --                      Types
    -------------------------------------------------------

    addTyVarBinds :: LHsTyVarBndrs Name                            -- the binders to be added
                  -> (Core [TH.TyVarBndr] -> DsM (Core (TH.Q a)))  -- action in the ext env
                  -> DsM (Core (TH.Q a))
    -- gensym a list of type variables and enter them into the meta environment;
    -- the computations passed as the second argument is executed in that extended
    -- meta environment and gets the *new* names on Core-level as an argument

    addTyVarBinds (HsQTvs { hsq_kvs = kvs, hsq_tvs = tvs }) m
      = do { fresh_kv_names <- mkGenSyms kvs
           ; fresh_tv_names <- mkGenSyms (map hsLTyVarName tvs)
           ; let fresh_names = fresh_kv_names ++ fresh_tv_names
           ; term <- addBinds fresh_names $
                     do { kbs <- repList tyVarBndrTyConName mk_tv_bndr (tvs `zip` fresh_tv_names)
                        ; m kbs }
           ; wrapGenSyms fresh_names term }
      where
        mk_tv_bndr (tv, (_,v)) = repTyVarBndrWithKind tv (coreVar v)

    addTyClTyVarBinds :: LHsTyVarBndrs Name
                      -> (Core [TH.TyVarBndr] -> DsM (Core (TH.Q a)))
                      -> DsM (Core (TH.Q a))

    -- Used for data/newtype declarations, and family instances,
    -- so that the nested type variables work right
    --    instance C (T a) where
    --      type W (T a) = blah
    -- The 'a' in the type instance is the one bound by the instance decl
    addTyClTyVarBinds tvs m
      = do { let tv_names = hsLKiTyVarNames tvs
           ; env <- dsGetMetaEnv
           ; freshNames <- mkGenSyms (filterOut (`elemNameEnv` env) tv_names)
                -- Make fresh names for the ones that are not already in scope
                -- This makes things work for family declarations

           ; term <- addBinds freshNames $
                     do { kbs <- repList tyVarBndrTyConName mk_tv_bndr (hsQTvBndrs tvs)
                        ; m kbs }

           ; wrapGenSyms freshNames term }
      where
        mk_tv_bndr tv = do { v <- lookupBinder (hsLTyVarName tv)
                           ; repTyVarBndrWithKind tv v }

    -- Produce kinded binder constructors from the Haskell tyvar binders
    --
    repTyVarBndrWithKind :: LHsTyVarBndr Name
                         -> Core TH.Name -> DsM (Core TH.TyVarBndr)
    repTyVarBndrWithKind (L _ (UserTyVar _)) nm
      = repPlainTV nm
    repTyVarBndrWithKind (L _ (KindedTyVar _ ki)) nm
      = repLKind ki >>= repKindedTV nm

    -- represent a type context
    --
    repLContext :: LHsContext Name -> DsM (Core TH.CxtQ)
    repLContext (L _ ctxt) = repContext ctxt

    repContext :: HsContext Name -> DsM (Core TH.CxtQ)
    repContext ctxt = do preds <- repList typeQTyConName repLTy ctxt
                         repCtxt preds

    -- yield the representation of a list of types
    --
    repLTys :: [LHsType Name] -> DsM [Core TH.TypeQ]
    repLTys tys = mapM repLTy tys

    -- represent a type
    --
    repLTy :: LHsType Name -> DsM (Core TH.TypeQ)
    repLTy (L _ ty) = repTy ty

    repTy :: HsType Name -> DsM (Core TH.TypeQ)
    repTy (HsForAllTy _ _ tvs ctxt ty)  =
      addTyVarBinds tvs $ \bndrs -> do
        ctxt1  <- repLContext ctxt
        ty1    <- repLTy ty
        repTForall bndrs ctxt1 ty1

    repTy (HsTyVar n)
      | isTvOcc occ   = do tv1 <- lookupOcc n
                           repTvar tv1
      | isDataOcc occ = do tc1 <- lookupOcc n
                           repPromotedTyCon tc1
      | otherwise     = do tc1 <- lookupOcc n
                           repNamedTyCon tc1
      where
        occ = nameOccName n

    repTy (HsAppTy f a)         = do
                                    f1 <- repLTy f
                                    a1 <- repLTy a
                                    repTapp f1 a1
    repTy (HsFunTy f a)         = do
                                    f1   <- repLTy f
                                    a1   <- repLTy a
                                    tcon <- repArrowTyCon
                                    repTapps tcon [f1, a1]
    repTy (HsListTy t)          = do
                                    t1   <- repLTy t
                                    tcon <- repListTyCon
                                    repTapp tcon t1
    repTy (HsPArrTy t)          = do
                                    t1   <- repLTy t
                                    tcon <- repTy (HsTyVar (tyConName parrTyCon))
                                    repTapp tcon t1
    repTy (HsTupleTy HsUnboxedTuple tys) = do
                                    tys1 <- repLTys tys
                                    tcon <- repUnboxedTupleTyCon (length tys)
                                    repTapps tcon tys1
    repTy (HsTupleTy _ tys)     = do tys1 <- repLTys tys
                                     tcon <- repTupleTyCon (length tys)
                                     repTapps tcon tys1
    repTy (HsOpTy ty1 (_, n) ty2) = repLTy ((nlHsTyVar (unLoc n) `nlHsAppTy` ty1)
                                       `nlHsAppTy` ty2)
    repTy (HsParTy t)           = repLTy t
    repTy (HsEqTy t1 t2) = do
                             t1' <- repLTy t1
                             t2' <- repLTy t2
                             eq  <- repTequality
                             repTapps eq [t1', t2']
    repTy (HsKindSig t k)       = do
                                    t1 <- repLTy t
                                    k1 <- repLKind k
                                    repTSig t1 k1
    repTy (HsSpliceTy splice _)     = repSplice splice
    repTy (HsExplicitListTy _ tys)  = do
                                        tys1 <- repLTys tys
                                        repTPromotedList tys1
    repTy (HsExplicitTupleTy _ tys) = do
                                        tys1 <- repLTys tys
                                        tcon <- repPromotedTupleTyCon (length tys)
                                        repTapps tcon tys1
    repTy (HsTyLit lit) = do
                            lit' <- repTyLit lit
                            repTLit lit'

    repTy ty                      = notHandled "Exotic form of type" (ppr ty)

    repTyLit :: HsTyLit -> DsM (Core TH.TyLitQ)
    repTyLit (HsNumTy _ i) = do iExpr <- mkIntegerExpr i
                                rep2 numTyLitName [iExpr]
    repTyLit (HsStrTy _ s) = do { s' <- mkStringExprFS s
                                ; rep2 strTyLitName [s']
                                }

    -- represent a kind
    --
    repLKind :: LHsKind Name -> DsM (Core TH.Kind)
    repLKind ki
      = do { let (kis, ki') = splitHsFunType ki
           ; kis_rep <- mapM repLKind kis
           ; ki'_rep <- repNonArrowLKind ki'
           ; kcon <- repKArrow
           ; let f k1 k2 = repKApp kcon k1 >>= flip repKApp k2
           ; foldrM f ki'_rep kis_rep
           }

    repNonArrowLKind :: LHsKind Name -> DsM (Core TH.Kind)
    repNonArrowLKind (L _ ki) = repNonArrowKind ki

    repNonArrowKind :: HsKind Name -> DsM (Core TH.Kind)
    repNonArrowKind (HsTyVar name)
      | name == liftedTypeKindTyConName = repKStar
      | name == constraintKindTyConName = repKConstraint
      | isTvOcc (nameOccName name)      = lookupOcc name >>= repKVar
      | otherwise                       = lookupOcc name >>= repKCon
    repNonArrowKind (HsAppTy f a)       = do  { f' <- repLKind f
                                              ; a' <- repLKind a
                                              ; repKApp f' a'
                                              }
    repNonArrowKind (HsListTy k)        = do  { k' <- repLKind k
                                              ; kcon <- repKList
                                              ; repKApp kcon k'
                                              }
    repNonArrowKind (HsTupleTy _ ks)    = do  { ks' <- mapM repLKind ks
                                              ; kcon <- repKTuple (length ks)
                                              ; repKApps kcon ks'
                                              }
    repNonArrowKind k                   = notHandled "Exotic form of kind" (ppr k)

    repRole :: Located (Maybe Role) -> DsM (Core TH.Role)
    repRole (L _ (Just Nominal))          = rep2 nominalRName []
    repRole (L _ (Just Representational)) = rep2 representationalRName []
    repRole (L _ (Just Phantom))          = rep2 phantomRName []
    repRole (L _ Nothing)                 = rep2 inferRName []

    -----------------------------------------------------------------------------
    --              Splices
    -----------------------------------------------------------------------------

    repSplice :: HsSplice Name -> DsM (Core a)
    -- See Note [How brackets and nested splices are handled] in TcSplice
    -- We return a CoreExpr of any old type; the context should know
    repSplice (HsSplice n _)
     = do { mb_val <- dsLookupMetaEnv n
           ; case mb_val of
               Just (DsSplice e) -> do { e' <- dsExpr e
                                       ; return (MkC e') }
               _ -> pprPanic "HsSplice" (ppr n) }
                            -- Should not happen; statically checked

    -----------------------------------------------------------------------------
    --              Expressions
    -----------------------------------------------------------------------------

    repLEs :: [LHsExpr Name] -> DsM (Core [TH.ExpQ])
    repLEs es = repList expQTyConName repLE es

    -- FIXME: some of these panics should be converted into proper error messages
    --        unless we can make sure that constructs, which are plainly not
    --        supported in TH already lead to error messages at an earlier stage
    repLE :: LHsExpr Name -> DsM (Core TH.ExpQ)
    repLE (L loc e) = putSrcSpanDs loc (repE e)

    repE :: HsExpr Name -> DsM (Core TH.ExpQ)
    repE (HsVar x)            =
      do { mb_val <- dsLookupMetaEnv x
         ; case mb_val of
            Nothing          -> do { str <- globalVar x
                                   ; repVarOrCon x str }
            Just (DsBound y)   -> repVarOrCon x (coreVar y)
            Just (DsSplice e)  -> do { e' <- dsExpr e
                                   ; return (MkC e') } }
    repE e@(HsIPVar _) = notHandled "Implicit parameters" (ppr e)

            -- Remember, we're desugaring renamer output here, so
            -- HsOverlit can definitely occur
    repE (HsOverLit l) = do { a <- repOverloadedLiteral l; repLit a }
    repE (HsLit l)     = do { a <- repLiteral l;           repLit a }
    repE (HsLam (MG { mg_alts = [m] })) = repLambda m
    repE (HsLamCase _ (MG { mg_alts = ms }))
                       = do { ms' <- mapM repMatchTup ms
                            ; core_ms <- coreList matchQTyConName ms'
                            ; repLamCase core_ms }
    repE (HsApp x y)   = do {a <- repLE x; b <- repLE y; repApp a b}

    repE (OpApp e1 op _ e2) =
      do { arg1 <- repLE e1;
           arg2 <- repLE e2;
           the_op <- repLE op ;
           repInfixApp arg1 the_op arg2 }
    repE (NegApp x _)        = do
                                  a         <- repLE x
                                  negateVar <- lookupOcc negateName >>= repVar
                                  negateVar `repApp` a
    repE (HsPar x)            = repLE x
    repE (SectionL x y)       = do { a <- repLE x; b <- repLE y; repSectionL a b }
    repE (SectionR x y)       = do { a <- repLE x; b <- repLE y; repSectionR a b }
    repE (HsCase e (MG { mg_alts = ms }))
                              = do { arg <- repLE e
                                   ; ms2 <- mapM repMatchTup ms
                                   ; core_ms2 <- coreList matchQTyConName ms2
                                   ; repCaseE arg core_ms2 }
    repE (HsIf _ x y z)         = do
                                  a <- repLE x
                                  b <- repLE y
                                  c <- repLE z
                                  repCond a b c
    repE (HsMultiIf _ alts)
      = do { (binds, alts') <- liftM unzip $ mapM repLGRHS alts
           ; expr' <- repMultiIf (nonEmptyCoreList alts')
           ; wrapGenSyms (concat binds) expr' }
    repE (HsLet bs e)         = do { (ss,ds) <- repBinds bs
                                   ; e2 <- addBinds ss (repLE e)
                                   ; z <- repLetE ds e2
                                   ; wrapGenSyms ss z }

    -- FIXME: I haven't got the types here right yet
    repE e@(HsDo ctxt sts _)
     | case ctxt of { DoExpr -> True; GhciStmtCtxt -> True; _ -> False }
     = do { (ss,zs) <- repLSts sts;
            e'      <- repDoE (nonEmptyCoreList zs);
            wrapGenSyms ss e' }

     | ListComp <- ctxt
     = do { (ss,zs) <- repLSts sts;
            e'      <- repComp (nonEmptyCoreList zs);
            wrapGenSyms ss e' }

      | otherwise
      = notHandled "mdo, monad comprehension and [: :]" (ppr e)

    repE (ExplicitList _ _ es) = do { xs <- repLEs es; repListExp xs }
    repE e@(ExplicitPArr _ _) = notHandled "Parallel arrays" (ppr e)
    repE e@(ExplicitTuple es boxed)
      | not (all tupArgPresent es) = notHandled "Tuple sections" (ppr e)
      | isBoxed boxed  = do { xs <- repLEs [e | L _ (Present e) <- es]; repTup xs }
      | otherwise      = do { xs <- repLEs [e | L _ (Present e) <- es]
                            ; repUnboxedTup xs }

    repE (RecordCon c _ flds)
     = do { x <- lookupLOcc c;
            fs <- repFields flds;
            repRecCon x fs }
    repE (RecordUpd e flds _ _ _)
     = do { x <- repLE e;
            fs <- repFields flds;
            repRecUpd x fs }

    repE (ExprWithTySig e ty _) = do { e1 <- repLE e; t1 <- repLTy ty; repSigExp e1 t1 }
    repE (ArithSeq _ _ aseq) =
      case aseq of
        From e              -> do { ds1 <- repLE e; repFrom ds1 }
        FromThen e1 e2      -> do
                                 ds1 <- repLE e1
                                 ds2 <- repLE e2
                                 repFromThen ds1 ds2
        FromTo   e1 e2      -> do
                                 ds1 <- repLE e1
                                 ds2 <- repLE e2
                                 repFromTo ds1 ds2
        FromThenTo e1 e2 e3 -> do
                                 ds1 <- repLE e1
                                 ds2 <- repLE e2
                                 ds3 <- repLE e3
                                 repFromThenTo ds1 ds2 ds3

    repE (HsSpliceE _ splice)  = repSplice splice
    repE (HsStatic e)          = repLE e >>= rep2 staticEName . (:[]) . unC
    repE e@(PArrSeq {})        = notHandled "Parallel arrays" (ppr e)
    repE e@(HsCoreAnn {})      = notHandled "Core annotations" (ppr e)
    repE e@(HsSCC {})          = notHandled "Cost centres" (ppr e)
    repE e@(HsTickPragma {})   = notHandled "Tick Pragma" (ppr e)
    repE e@(HsTcBracketOut {}) = notHandled "TH brackets" (ppr e)
    repE e                     = notHandled "Expression form" (ppr e)

    -----------------------------------------------------------------------------
    -- Building representations of auxillary structures like Match, Clause, Stmt,

    repMatchTup ::  LMatch Name (LHsExpr Name) -> DsM (Core TH.MatchQ)
    repMatchTup (L _ (Match _ [p] _ (GRHSs guards wheres))) =
      do { ss1 <- mkGenSyms (collectPatBinders p)
         ; addBinds ss1 $ do {
         ; p1 <- repLP p
         ; (ss2,ds) <- repBinds wheres
         ; addBinds ss2 $ do {
         ; gs    <- repGuards guards
         ; match <- repMatch p1 gs ds
         ; wrapGenSyms (ss1++ss2) match }}}
    repMatchTup _ = panic "repMatchTup: case alt with more than one arg"

    repClauseTup ::  LMatch Name (LHsExpr Name) -> DsM (Core TH.ClauseQ)
    repClauseTup (L _ (Match _ ps _ (GRHSs guards wheres))) =
      do { ss1 <- mkGenSyms (collectPatsBinders ps)
         ; addBinds ss1 $ do {
           ps1 <- repLPs ps
         ; (ss2,ds) <- repBinds wheres
         ; addBinds ss2 $ do {
           gs <- repGuards guards
         ; clause <- repClause ps1 gs ds
         ; wrapGenSyms (ss1++ss2) clause }}}

    repGuards ::  [LGRHS Name (LHsExpr Name)] ->  DsM (Core TH.BodyQ)
    repGuards [L _ (GRHS [] e)]
      = do {a <- repLE e; repNormal a }
    repGuards other
      = do { zs <- mapM repLGRHS other
           ; let (xs, ys) = unzip zs
           ; gd <- repGuarded (nonEmptyCoreList ys)
           ; wrapGenSyms (concat xs) gd }

    repLGRHS :: LGRHS Name (LHsExpr Name) -> DsM ([GenSymBind], (Core (TH.Q (TH.Guard, TH.Exp))))
    repLGRHS (L _ (GRHS [L _ (BodyStmt e1 _ _ _)] e2))
      = do { guarded <- repLNormalGE e1 e2
           ; return ([], guarded) }
    repLGRHS (L _ (GRHS ss rhs))
      = do { (gs, ss') <- repLSts ss
           ; rhs' <- addBinds gs $ repLE rhs
           ; guarded <- repPatGE (nonEmptyCoreList ss') rhs'
           ; return (gs, guarded) }

    repFields :: HsRecordBinds Name -> DsM (Core [TH.Q TH.FieldExp])
    repFields (HsRecFields { rec_flds = flds })
      = repList fieldExpQTyConName rep_fld flds
      where
        rep_fld (L _ fld) = do { fn <- lookupLOcc (hsRecFieldId fld)
                               ; e  <- repLE (hsRecFieldArg fld)
                               ; repFieldExp fn e }

    -----------------------------------------------------------------------------
    -- Representing Stmt's is tricky, especially if bound variables
    -- shadow each other. Consider:  [| do { x <- f 1; x <- f x; g x } |]
    -- First gensym new names for every variable in any of the patterns.
    -- both static (x'1 and x'2), and dynamic ((gensym "x") and (gensym "y"))
    -- if variables didn't shaddow, the static gensym wouldn't be necessary
    -- and we could reuse the original names (x and x).
    --
    -- do { x'1 <- gensym "x"
    --    ; x'2 <- gensym "x"
    --    ; doE [ BindSt (pvar x'1) [| f 1 |]
    --          , BindSt (pvar x'2) [| f x |]
    --          , NoBindSt [| g x |]
    --          ]
    --    }

    -- The strategy is to translate a whole list of do-bindings by building a
    -- bigger environment, and a bigger set of meta bindings
    -- (like:  x'1 <- gensym "x" ) and then combining these with the translations
    -- of the expressions within the Do

    -----------------------------------------------------------------------------
    -- The helper function repSts computes the translation of each sub expression
    -- and a bunch of prefix bindings denoting the dynamic renaming.

    repLSts :: [LStmt Name (LHsExpr Name)] -> DsM ([GenSymBind], [Core TH.StmtQ])
    repLSts stmts = repSts (map unLoc stmts)

    repSts :: [Stmt Name (LHsExpr Name)] -> DsM ([GenSymBind], [Core TH.StmtQ])
    repSts (BindStmt p e _ _ : ss) =
       do { e2 <- repLE e
          ; ss1 <- mkGenSyms (collectPatBinders p)
          ; addBinds ss1 $ do {
          ; p1 <- repLP p;
          ; (ss2,zs) <- repSts ss
          ; z <- repBindSt p1 e2
          ; return (ss1++ss2, z : zs) }}
    repSts (LetStmt bs : ss) =
       do { (ss1,ds) <- repBinds bs
          ; z <- repLetSt ds
          ; (ss2,zs) <- addBinds ss1 (repSts ss)
          ; return (ss1++ss2, z : zs) }
    repSts (BodyStmt e _ _ _ : ss) =
       do { e2 <- repLE e
          ; z <- repNoBindSt e2
          ; (ss2,zs) <- repSts ss
          ; return (ss2, z : zs) }
    repSts (ParStmt stmt_blocks _ _ : ss) =
       do { (ss_s, stmt_blocks1) <- mapAndUnzipM rep_stmt_block stmt_blocks
          ; let stmt_blocks2 = nonEmptyCoreList stmt_blocks1
                ss1 = concat ss_s
          ; z <- repParSt stmt_blocks2
          ; (ss2, zs) <- addBinds ss1 (repSts ss)
          ; return (ss1++ss2, z : zs) }
       where
         rep_stmt_block :: ParStmtBlock Name Name -> DsM ([GenSymBind], Core [TH.StmtQ])
         rep_stmt_block (ParStmtBlock stmts _ _) =
           do { (ss1, zs) <- repSts (map unLoc stmts)
              ; zs1 <- coreList stmtQTyConName zs
              ; return (ss1, zs1) }
    repSts [LastStmt e _]
      = do { e2 <- repLE e
           ; z <- repNoBindSt e2
           ; return ([], [z]) }
    repSts []    = return ([],[])
    repSts other = notHandled "Exotic statement" (ppr other)

    -----------------------------------------------------------
    --                      Bindings
    -----------------------------------------------------------

    repBinds :: HsLocalBinds Name -> DsM ([GenSymBind], Core [TH.DecQ])
    repBinds EmptyLocalBinds
      = do  { core_list <- coreList decQTyConName []
            ; return ([], core_list) }

    repBinds b@(HsIPBinds _) = notHandled "Implicit parameters" (ppr b)

    repBinds (HsValBinds decs)
     = do   { let { bndrs = hsSigTvBinders decs ++ collectHsValBinders decs }
                    -- No need to worrry about detailed scopes within
                    -- the binding group, because we are talking Names
                    -- here, so we can safely treat it as a mutually
                    -- recursive group
                    -- For hsSigTvBinders see Note [Scoped type variables in bindings]
            ; ss        <- mkGenSyms bndrs
            ; prs       <- addBinds ss (rep_val_binds decs)
            ; core_list <- coreList decQTyConName
                                    (de_loc (sort_by_loc prs))
            ; return (ss, core_list) }

    rep_val_binds :: HsValBinds Name -> DsM [(SrcSpan, Core TH.DecQ)]
    -- Assumes: all the binders of the binding are alrady in the meta-env
    rep_val_binds (ValBindsOut binds sigs)
     = do { core1 <- rep_binds' (unionManyBags (map snd binds))
          ; core2 <- rep_sigs' sigs
          ; return (core1 ++ core2) }
    rep_val_binds (ValBindsIn _ _)
     = panic "rep_val_binds: ValBindsIn"

    rep_binds :: LHsBinds Name -> DsM [Core TH.DecQ]
    rep_binds binds = do { binds_w_locs <- rep_binds' binds
                         ; return (de_loc (sort_by_loc binds_w_locs)) }

    rep_binds' :: LHsBinds Name -> DsM [(SrcSpan, Core TH.DecQ)]
    rep_binds' = mapM rep_bind . bagToList

    rep_bind :: LHsBind Name -> DsM (SrcSpan, Core TH.DecQ)
    -- Assumes: all the binders of the binding are alrady in the meta-env

    -- Note GHC treats declarations of a variable (not a pattern)
    -- e.g.  x = g 5 as a Fun MonoBinds. This is indicated by a single match
    -- with an empty list of patterns
    rep_bind (L loc (FunBind
                     { fun_id = fn,
                       fun_matches = MG { mg_alts = [L _ (Match _ [] _
                                                       (GRHSs guards wheres))] } }))
     = do { (ss,wherecore) <- repBinds wheres
            ; guardcore <- addBinds ss (repGuards guards)
            ; fn'  <- lookupLBinder fn
            ; p    <- repPvar fn'
            ; ans  <- repVal p guardcore wherecore
            ; ans' <- wrapGenSyms ss ans
            ; return (loc, ans') }

    rep_bind (L loc (FunBind { fun_id = fn, fun_matches = MG { mg_alts = ms } }))
     =   do { ms1 <- mapM repClauseTup ms
            ; fn' <- lookupLBinder fn
            ; ans <- repFun fn' (nonEmptyCoreList ms1)
            ; return (loc, ans) }

    rep_bind (L loc (PatBind { pat_lhs = pat, pat_rhs = GRHSs guards wheres }))
     =   do { patcore <- repLP pat
            ; (ss,wherecore) <- repBinds wheres
            ; guardcore <- addBinds ss (repGuards guards)
            ; ans  <- repVal patcore guardcore wherecore
            ; ans' <- wrapGenSyms ss ans
            ; return (loc, ans') }

    rep_bind (L _ (VarBind { var_id = v, var_rhs = e}))
     =   do { v' <- lookupBinder v
            ; e2 <- repLE e
            ; x <- repNormal e2
            ; patcore <- repPvar v'
            ; empty_decls <- coreList decQTyConName []
            ; ans <- repVal patcore x empty_decls
            ; return (srcLocSpan (getSrcLoc v), ans) }

    rep_bind (L _ (AbsBinds {}))  = panic "rep_bind: AbsBinds"
    rep_bind (L _ dec@(PatSynBind {})) = notHandled "pattern synonyms" (ppr dec)
    -----------------------------------------------------------------------------
    -- Since everything in a Bind is mutually recursive we need rename all
    -- all the variables simultaneously. For example:
    -- [| AndMonoBinds (f x = x + g 2) (g x = f 1 + 2) |] would translate to
    -- do { f'1 <- gensym "f"
    --    ; g'2 <- gensym "g"
    --    ; [ do { x'3 <- gensym "x"; fun f'1 [pvar x'3] [| x + g2 |]},
    --        do { x'4 <- gensym "x"; fun g'2 [pvar x'4] [| f 1 + 2 |]}
    --      ]}
    -- This requires collecting the bindings (f'1 <- gensym "f"), and the
    -- environment ( f |-> f'1 ) from each binding, and then unioning them
    -- together. As we do this we collect GenSymBinds's which represent the renamed
    -- variables bound by the Bindings. In order not to lose track of these
    -- representations we build a shadow datatype MB with the same structure as
    -- MonoBinds, but which has slots for the representations

    -----------------------------------------------------------------------------
    -- GHC allows a more general form of lambda abstraction than specified
    -- by Haskell 98. In particular it allows guarded lambda's like :
    -- (\  x | even x -> 0 | odd x -> 1) at the moment we can't represent this in
    -- Haskell Template's Meta.Exp type so we punt if it isn't a simple thing like
    -- (\ p1 .. pn -> exp) by causing an error.

    repLambda :: LMatch Name (LHsExpr Name) -> DsM (Core TH.ExpQ)
    repLambda (L _ (Match _ ps _ (GRHSs [L _ (GRHS [] e)] EmptyLocalBinds)))
     = do { let bndrs = collectPatsBinders ps ;
          ; ss  <- mkGenSyms bndrs
          ; lam <- addBinds ss (
                    do { xs <- repLPs ps; body <- repLE e; repLam xs body })
          ; wrapGenSyms ss lam }

    repLambda (L _ m) = notHandled "Guarded labmdas" (pprMatch (LambdaExpr :: HsMatchContext Name) m)

    -----------------------------------------------------------------------------
    --                      Patterns
    -- repP deals with patterns.  It assumes that we have already
    -- walked over the pattern(s) once to collect the binders, and
    -- have extended the environment.  So every pattern-bound
    -- variable should already appear in the environment.

    -- Process a list of patterns
    repLPs :: [LPat Name] -> DsM (Core [TH.PatQ])
    repLPs ps = repList patQTyConName repLP ps

    repLP :: LPat Name -> DsM (Core TH.PatQ)
    repLP (L _ p) = repP p

    repP :: Pat Name -> DsM (Core TH.PatQ)
    repP (WildPat _)       = repPwild
    repP (LitPat l)        = do { l2 <- repLiteral l; repPlit l2 }
    repP (VarPat x)        = do { x' <- lookupBinder x; repPvar x' }
    repP (LazyPat p)       = do { p1 <- repLP p; repPtilde p1 }
    repP (BangPat p)       = do { p1 <- repLP p; repPbang p1 }
    repP (AsPat x p)       = do { x' <- lookupLBinder x; p1 <- repLP p; repPaspat x' p1 }
    repP (ParPat p)        = repLP p
    repP (ListPat ps _ Nothing)    = do { qs <- repLPs ps; repPlist qs }
    repP (ListPat ps ty1 (Just (_,e))) = do { p <- repP (ListPat ps ty1 Nothing); e' <- repE e; repPview e' p}
    repP (TuplePat ps boxed _)
      | isBoxed boxed       = do { qs <- repLPs ps; repPtup qs }
      | otherwise           = do { qs <- repLPs ps; repPunboxedTup qs }
    repP (ConPatIn dc details)
     = do { con_str <- lookupLOcc dc
          ; case details of
             PrefixCon ps -> do { qs <- repLPs ps; repPcon con_str qs }
             RecCon rec   -> do { fps <- repList fieldPatQTyConName rep_fld (rec_flds rec)
                                ; repPrec con_str fps }
             InfixCon p1 p2 -> do { p1' <- repLP p1;
                                    p2' <- repLP p2;
                                    repPinfix p1' con_str p2' }
       }
     where
       rep_fld (L _ fld) = do { MkC v <- lookupLOcc (hsRecFieldId fld)
                              ; MkC p <- repLP (hsRecFieldArg fld)
                              ; rep2 fieldPatName [v,p] }

    repP (NPat (L _ l) Nothing _)  = do { a <- repOverloadedLiteral l; repPlit a }
    repP (ViewPat e p _) = do { e' <- repLE e; p' <- repLP p; repPview e' p' }
    repP p@(NPat _ (Just _) _) = notHandled "Negative overloaded patterns" (ppr p)
    repP p@(SigPatIn {})  = notHandled "Type signatures in patterns" (ppr p)
            -- The problem is to do with scoped type variables.
            -- To implement them, we have to implement the scoping rules
            -- here in DsMeta, and I don't want to do that today!
            --       do { p' <- repLP p; t' <- repLTy t; repPsig p' t' }
            --      repPsig :: Core TH.PatQ -> Core TH.TypeQ -> DsM (Core TH.PatQ)
            --      repPsig (MkC p) (MkC t) = rep2 sigPName [p, t]

    repP (SplicePat splice) = repSplice splice

    repP other = notHandled "Exotic pattern" (ppr other)

    ----------------------------------------------------------
    -- Declaration ordering helpers

    sort_by_loc :: [(SrcSpan, a)] -> [(SrcSpan, a)]
    sort_by_loc xs = sortBy comp xs
        where comp x y = compare (fst x) (fst y)

    de_loc :: [(a, b)] -> [b]
    de_loc = map snd

    ----------------------------------------------------------
    --      The meta-environment

    -- A name/identifier association for fresh names of locally bound entities
    type GenSymBind = (Name, Id)    -- Gensym the string and bind it to the Id
                                    -- I.e.         (x, x_id) means
                                    --      let x_id = gensym "x" in ...

    -- Generate a fresh name for a locally bound entity

    mkGenSyms :: [Name] -> DsM [GenSymBind]
    -- We can use the existing name.  For example:
    --      [| \x_77 -> x_77 + x_77 |]
    -- desugars to
    --      do { x_77 <- genSym "x"; .... }
    -- We use the same x_77 in the desugared program, but with the type Bndr
    -- instead of Int
    --
    -- We do make it an Internal name, though (hence localiseName)
    --
    -- Nevertheless, it's monadic because we have to generate nameTy
    mkGenSyms ns = do { var_ty <- lookupType nameTyConName
                      ; return [(nm, mkLocalId (localiseName nm) var_ty) | nm <- ns] }

    addBinds :: [GenSymBind] -> DsM a -> DsM a
    -- Add a list of fresh names for locally bound entities to the
    -- meta environment (which is part of the state carried around
    -- by the desugarer monad)
    addBinds bs m = dsExtendMetaEnv (mkNameEnv [(n,DsBound id) | (n,id) <- bs]) m

    dupBinder :: (Name, Name) -> DsM (Name, DsMetaVal)
    dupBinder (new, old)
      = do { mb_val <- dsLookupMetaEnv old
           ; case mb_val of
               Just val -> return (new, val)
               Nothing  -> pprPanic "dupBinder" (ppr old) }

    -- Look up a locally bound name
    --
    lookupLBinder :: Located Name -> DsM (Core TH.Name)
    lookupLBinder (L _ n) = lookupBinder n

    lookupBinder :: Name -> DsM (Core TH.Name)
    lookupBinder = lookupOcc
      -- Binders are brought into scope before the pattern or what-not is
      -- desugared.  Moreover, in instance declaration the binder of a method
      -- will be the selector Id and hence a global; so we need the
      -- globalVar case of lookupOcc

    -- Look up a name that is either locally bound or a global name
    --
    --  * If it is a global name, generate the "original name" representation (ie,
    --   the <module>:<name> form) for the associated entity
    --
    lookupLOcc :: Located Name -> DsM (Core TH.Name)
    -- Lookup an occurrence; it can't be a splice.
    -- Use the in-scope bindings if they exist
    lookupLOcc (L _ n) = lookupOcc n

    lookupOcc :: Name -> DsM (Core TH.Name)
    lookupOcc n
      = do {  mb_val <- dsLookupMetaEnv n ;
              case mb_val of
                    Nothing           -> globalVar n
                    Just (DsBound x)  -> return (coreVar x)
                    Just (DsSplice _) -> pprPanic "repE:lookupOcc" (ppr n)
        }

    globalVar :: Name -> DsM (Core TH.Name)
    -- Not bound by the meta-env
    -- Could be top-level; or could be local
    --      f x = $(g [| x |])
    -- Here the x will be local
    globalVar name
      | isExternalName name
      = do  { MkC mod <- coreStringLit name_mod
            ; MkC pkg <- coreStringLit name_pkg
            ; MkC occ <- occNameLit name
            ; rep2 mk_varg [pkg,mod,occ] }
      | otherwise
      = do  { MkC occ <- occNameLit name
            ; MkC uni <- coreIntLit (getKey (getUnique name))
            ; rep2 mkNameLName [occ,uni] }
      where
          mod = ASSERT( isExternalName name) nameModule name
          name_mod = moduleNameString (moduleName mod)
          name_pkg = packageKeyString (modulePackageKey mod)
          name_occ = nameOccName name
          mk_varg | OccName.isDataOcc name_occ = mkNameG_dName
                  | OccName.isVarOcc  name_occ = mkNameG_vName
                  | OccName.isTcOcc   name_occ = mkNameG_tcName
                  | otherwise                  = pprPanic "DsMeta.globalVar" (ppr name)

    lookupType :: Name      -- Name of type constructor (e.g. TH.ExpQ)
               -> DsM Type  -- The type
    lookupType tc_name = do { tc <- dsLookupTyCon tc_name ;
                              return (mkTyConApp tc []) }

    wrapGenSyms :: [GenSymBind]
                -> Core (TH.Q a) -> DsM (Core (TH.Q a))
    -- wrapGenSyms [(nm1,id1), (nm2,id2)] y
    --      --> bindQ (gensym nm1) (\ id1 ->
    --          bindQ (gensym nm2 (\ id2 ->
    --          y))

    wrapGenSyms binds body@(MkC b)
      = do  { var_ty <- lookupType nameTyConName
            ; go var_ty binds }
      where
        [elt_ty] = tcTyConAppArgs (exprType b)
            -- b :: Q a, so we can get the type 'a' by looking at the
            -- argument type. NB: this relies on Q being a data/newtype,
            -- not a type synonym

        go _ [] = return body
        go var_ty ((name,id) : binds)
          = do { MkC body'  <- go var_ty binds
               ; lit_str    <- occNameLit name
               ; gensym_app <- repGensym lit_str
               ; repBindQ var_ty elt_ty
                          gensym_app (MkC (Lam id body')) }

    occNameLit :: Name -> DsM (Core String)
    occNameLit n = coreStringLit (occNameString (nameOccName n))

    -- %*********************************************************************
    -- %*                                                                   *
    --              Constructing code
    -- %*                                                                   *
    -- %*********************************************************************

    -----------------------------------------------------------------------------
    -- PHANTOM TYPES for consistency. In order to make sure we do this correct
    -- we invent a new datatype which uses phantom types.

    newtype Core a = MkC CoreExpr
    unC :: Core a -> CoreExpr
    unC (MkC x) = x

    rep2 :: Name -> [ CoreExpr ] -> DsM (Core a)
    rep2 n xs = do { id <- dsLookupGlobalId n
                   ; return (MkC (foldl App (Var id) xs)) }

    dataCon' :: Name -> [CoreExpr] -> DsM (Core a)
    dataCon' n args = do { id <- dsLookupDataCon n
                         ; return $ MkC $ mkCoreConApps id args }

    dataCon :: Name -> DsM (Core a)
    dataCon n = dataCon' n []

    -- Then we make "repConstructors" which use the phantom types for each of the
    -- smart constructors of the Meta.Meta datatypes.

    -- %*********************************************************************
    -- %*                                                                   *
    --              The 'smart constructors'
    -- %*                                                                   *
    -- %*********************************************************************

    --------------- Patterns -----------------
    repPlit   :: Core TH.Lit -> DsM (Core TH.PatQ)
    repPlit (MkC l) = rep2 litPName [l]

    repPvar :: Core TH.Name -> DsM (Core TH.PatQ)
    repPvar (MkC s) = rep2 varPName [s]

    repPtup :: Core [TH.PatQ] -> DsM (Core TH.PatQ)
    repPtup (MkC ps) = rep2 tupPName [ps]

    repPunboxedTup :: Core [TH.PatQ] -> DsM (Core TH.PatQ)
    repPunboxedTup (MkC ps) = rep2 unboxedTupPName [ps]

    repPcon   :: Core TH.Name -> Core [TH.PatQ] -> DsM (Core TH.PatQ)
    repPcon (MkC s) (MkC ps) = rep2 conPName [s, ps]

    repPrec   :: Core TH.Name -> Core [(TH.Name,TH.PatQ)] -> DsM (Core TH.PatQ)
    repPrec (MkC c) (MkC rps) = rep2 recPName [c,rps]

    repPinfix :: Core TH.PatQ -> Core TH.Name -> Core TH.PatQ -> DsM (Core TH.PatQ)
    repPinfix (MkC p1) (MkC n) (MkC p2) = rep2 infixPName [p1, n, p2]

    repPtilde :: Core TH.PatQ -> DsM (Core TH.PatQ)
    repPtilde (MkC p) = rep2 tildePName [p]

    repPbang :: Core TH.PatQ -> DsM (Core TH.PatQ)
    repPbang (MkC p) = rep2 bangPName [p]

    repPaspat :: Core TH.Name -> Core TH.PatQ -> DsM (Core TH.PatQ)
    repPaspat (MkC s) (MkC p) = rep2 asPName [s, p]

    repPwild  :: DsM (Core TH.PatQ)
    repPwild = rep2 wildPName []

    repPlist :: Core [TH.PatQ] -> DsM (Core TH.PatQ)
    repPlist (MkC ps) = rep2 listPName [ps]

    repPview :: Core TH.ExpQ -> Core TH.PatQ -> DsM (Core TH.PatQ)
    repPview (MkC e) (MkC p) = rep2 viewPName [e,p]

    --------------- Expressions -----------------
    repVarOrCon :: Name -> Core TH.Name -> DsM (Core TH.ExpQ)
    repVarOrCon vc str | isDataOcc (nameOccName vc) = repCon str
                       | otherwise                  = repVar str

    repVar :: Core TH.Name -> DsM (Core TH.ExpQ)
    repVar (MkC s) = rep2 varEName [s]

    repCon :: Core TH.Name -> DsM (Core TH.ExpQ)
    repCon (MkC s) = rep2 conEName [s]

    repLit :: Core TH.Lit -> DsM (Core TH.ExpQ)
    repLit (MkC c) = rep2 litEName [c]

    repApp :: Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repApp (MkC x) (MkC y) = rep2 appEName [x,y]

    repLam :: Core [TH.PatQ] -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repLam (MkC ps) (MkC e) = rep2 lamEName [ps, e]

    repLamCase :: Core [TH.MatchQ] -> DsM (Core TH.ExpQ)
    repLamCase (MkC ms) = rep2 lamCaseEName [ms]

    repTup :: Core [TH.ExpQ] -> DsM (Core TH.ExpQ)
    repTup (MkC es) = rep2 tupEName [es]

    repUnboxedTup :: Core [TH.ExpQ] -> DsM (Core TH.ExpQ)
    repUnboxedTup (MkC es) = rep2 unboxedTupEName [es]

    repCond :: Core TH.ExpQ -> Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repCond (MkC x) (MkC y) (MkC z) = rep2 condEName [x,y,z]

    repMultiIf :: Core [TH.Q (TH.Guard, TH.Exp)] -> DsM (Core TH.ExpQ)
    repMultiIf (MkC alts) = rep2 multiIfEName [alts]

    repLetE :: Core [TH.DecQ] -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repLetE (MkC ds) (MkC e) = rep2 letEName [ds, e]

    repCaseE :: Core TH.ExpQ -> Core [TH.MatchQ] -> DsM( Core TH.ExpQ)
    repCaseE (MkC e) (MkC ms) = rep2 caseEName [e, ms]

    repDoE :: Core [TH.StmtQ] -> DsM (Core TH.ExpQ)
    repDoE (MkC ss) = rep2 doEName [ss]

    repComp :: Core [TH.StmtQ] -> DsM (Core TH.ExpQ)
    repComp (MkC ss) = rep2 compEName [ss]

    repListExp :: Core [TH.ExpQ] -> DsM (Core TH.ExpQ)
    repListExp (MkC es) = rep2 listEName [es]

    repSigExp :: Core TH.ExpQ -> Core TH.TypeQ -> DsM (Core TH.ExpQ)
    repSigExp (MkC e) (MkC t) = rep2 sigEName [e,t]

    repRecCon :: Core TH.Name -> Core [TH.Q TH.FieldExp]-> DsM (Core TH.ExpQ)
    repRecCon (MkC c) (MkC fs) = rep2 recConEName [c,fs]

    repRecUpd :: Core TH.ExpQ -> Core [TH.Q TH.FieldExp] -> DsM (Core TH.ExpQ)
    repRecUpd (MkC e) (MkC fs) = rep2 recUpdEName [e,fs]

    repFieldExp :: Core TH.Name -> Core TH.ExpQ -> DsM (Core (TH.Q TH.FieldExp))
    repFieldExp (MkC n) (MkC x) = rep2 fieldExpName [n,x]

    repInfixApp :: Core TH.ExpQ -> Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repInfixApp (MkC x) (MkC y) (MkC z) = rep2 infixAppName [x,y,z]

    repSectionL :: Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repSectionL (MkC x) (MkC y) = rep2 sectionLName [x,y]

    repSectionR :: Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repSectionR (MkC x) (MkC y) = rep2 sectionRName [x,y]

    ------------ Right hand sides (guarded expressions) ----
    repGuarded :: Core [TH.Q (TH.Guard, TH.Exp)] -> DsM (Core TH.BodyQ)
    repGuarded (MkC pairs) = rep2 guardedBName [pairs]

    repNormal :: Core TH.ExpQ -> DsM (Core TH.BodyQ)
    repNormal (MkC e) = rep2 normalBName [e]

    ------------ Guards ----
    repLNormalGE :: LHsExpr Name -> LHsExpr Name -> DsM (Core (TH.Q (TH.Guard, TH.Exp)))
    repLNormalGE g e = do g' <- repLE g
                          e' <- repLE e
                          repNormalGE g' e'

    repNormalGE :: Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core (TH.Q (TH.Guard, TH.Exp)))
    repNormalGE (MkC g) (MkC e) = rep2 normalGEName [g, e]

    repPatGE :: Core [TH.StmtQ] -> Core TH.ExpQ -> DsM (Core (TH.Q (TH.Guard, TH.Exp)))
    repPatGE (MkC ss) (MkC e) = rep2 patGEName [ss, e]

    ------------- Stmts -------------------
    repBindSt :: Core TH.PatQ -> Core TH.ExpQ -> DsM (Core TH.StmtQ)
    repBindSt (MkC p) (MkC e) = rep2 bindSName [p,e]

    repLetSt :: Core [TH.DecQ] -> DsM (Core TH.StmtQ)
    repLetSt (MkC ds) = rep2 letSName [ds]

    repNoBindSt :: Core TH.ExpQ -> DsM (Core TH.StmtQ)
    repNoBindSt (MkC e) = rep2 noBindSName [e]

    repParSt :: Core [[TH.StmtQ]] -> DsM (Core TH.StmtQ)
    repParSt (MkC sss) = rep2 parSName [sss]

    -------------- Range (Arithmetic sequences) -----------
    repFrom :: Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repFrom (MkC x) = rep2 fromEName [x]

    repFromThen :: Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repFromThen (MkC x) (MkC y) = rep2 fromThenEName [x,y]

    repFromTo :: Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repFromTo (MkC x) (MkC y) = rep2 fromToEName [x,y]

    repFromThenTo :: Core TH.ExpQ -> Core TH.ExpQ -> Core TH.ExpQ -> DsM (Core TH.ExpQ)
    repFromThenTo (MkC x) (MkC y) (MkC z) = rep2 fromThenToEName [x,y,z]

    ------------ Match and Clause Tuples -----------
    repMatch :: Core TH.PatQ -> Core TH.BodyQ -> Core [TH.DecQ] -> DsM (Core TH.MatchQ)
    repMatch (MkC p) (MkC bod) (MkC ds) = rep2 matchName [p, bod, ds]

    repClause :: Core [TH.PatQ] -> Core TH.BodyQ -> Core [TH.DecQ] -> DsM (Core TH.ClauseQ)
    repClause (MkC ps) (MkC bod) (MkC ds) = rep2 clauseName [ps, bod, ds]

    -------------- Dec -----------------------------
    repVal :: Core TH.PatQ -> Core TH.BodyQ -> Core [TH.DecQ] -> DsM (Core TH.DecQ)
    repVal (MkC p) (MkC b) (MkC ds) = rep2 valDName [p, b, ds]

    repFun :: Core TH.Name -> Core [TH.ClauseQ] -> DsM (Core TH.DecQ)
    repFun (MkC nm) (MkC b) = rep2 funDName [nm, b]

    repData :: Core TH.CxtQ -> Core TH.Name -> Core [TH.TyVarBndr]
            -> Maybe (Core [TH.TypeQ])
            -> Core [TH.ConQ] -> Core [TH.Name] -> DsM (Core TH.DecQ)
    repData (MkC cxt) (MkC nm) (MkC tvs) Nothing (MkC cons) (MkC derivs)
      = rep2 dataDName [cxt, nm, tvs, cons, derivs]
    repData (MkC cxt) (MkC nm) (MkC _) (Just (MkC tys)) (MkC cons) (MkC derivs)
      = rep2 dataInstDName [cxt, nm, tys, cons, derivs]

    repNewtype :: Core TH.CxtQ -> Core TH.Name -> Core [TH.TyVarBndr]
               -> Maybe (Core [TH.TypeQ])
               -> Core TH.ConQ -> Core [TH.Name] -> DsM (Core TH.DecQ)
    repNewtype (MkC cxt) (MkC nm) (MkC tvs) Nothing (MkC con) (MkC derivs)
      = rep2 newtypeDName [cxt, nm, tvs, con, derivs]
    repNewtype (MkC cxt) (MkC nm) (MkC _) (Just (MkC tys)) (MkC con) (MkC derivs)
      = rep2 newtypeInstDName [cxt, nm, tys, con, derivs]

    repTySyn :: Core TH.Name -> Core [TH.TyVarBndr]
             -> Core TH.TypeQ -> DsM (Core TH.DecQ)
    repTySyn (MkC nm) (MkC tvs) (MkC rhs)
      = rep2 tySynDName [nm, tvs, rhs]

    repInst :: Core TH.CxtQ -> Core TH.TypeQ -> Core [TH.DecQ] -> DsM (Core TH.DecQ)
    repInst (MkC cxt) (MkC ty) (MkC ds) = rep2 instanceDName [cxt, ty, ds]

    repClass :: Core TH.CxtQ -> Core TH.Name -> Core [TH.TyVarBndr]
             -> Core [TH.FunDep] -> Core [TH.DecQ]
             -> DsM (Core TH.DecQ)
    repClass (MkC cxt) (MkC cls) (MkC tvs) (MkC fds) (MkC ds)
      = rep2 classDName [cxt, cls, tvs, fds, ds]

    repDeriv :: Core TH.CxtQ -> Core TH.TypeQ -> DsM (Core TH.DecQ)
    repDeriv (MkC cxt) (MkC ty) = rep2 standaloneDerivDName [cxt, ty]

    repPragInl :: Core TH.Name -> Core TH.Inline -> Core TH.RuleMatch
               -> Core TH.Phases -> DsM (Core TH.DecQ)
    repPragInl (MkC nm) (MkC inline) (MkC rm) (MkC phases)
      = rep2 pragInlDName [nm, inline, rm, phases]

    repPragSpec :: Core TH.Name -> Core TH.TypeQ -> Core TH.Phases
                -> DsM (Core TH.DecQ)
    repPragSpec (MkC nm) (MkC ty) (MkC phases)
      = rep2 pragSpecDName [nm, ty, phases]

    repPragSpecInl :: Core TH.Name -> Core TH.TypeQ -> Core TH.Inline
                   -> Core TH.Phases -> DsM (Core TH.DecQ)
    repPragSpecInl (MkC nm) (MkC ty) (MkC inline) (MkC phases)
      = rep2 pragSpecInlDName [nm, ty, inline, phases]

    repPragSpecInst :: Core TH.TypeQ -> DsM (Core TH.DecQ)
    repPragSpecInst (MkC ty) = rep2 pragSpecInstDName [ty]

    repPragRule :: Core String -> Core [TH.RuleBndrQ] -> Core TH.ExpQ
                -> Core TH.ExpQ -> Core TH.Phases -> DsM (Core TH.DecQ)
    repPragRule (MkC nm) (MkC bndrs) (MkC lhs) (MkC rhs) (MkC phases)
      = rep2 pragRuleDName [nm, bndrs, lhs, rhs, phases]

    repPragAnn :: Core TH.AnnTarget -> Core TH.ExpQ -> DsM (Core TH.DecQ)
    repPragAnn (MkC targ) (MkC e) = rep2 pragAnnDName [targ, e]

    repFamilyNoKind :: Core TH.FamFlavour -> Core TH.Name -> Core [TH.TyVarBndr]
                    -> DsM (Core TH.DecQ)
    repFamilyNoKind (MkC flav) (MkC nm) (MkC tvs)
        = rep2 familyNoKindDName [flav, nm, tvs]

    repFamilyKind :: Core TH.FamFlavour -> Core TH.Name -> Core [TH.TyVarBndr]
                  -> Core TH.Kind
                  -> DsM (Core TH.DecQ)
    repFamilyKind (MkC flav) (MkC nm) (MkC tvs) (MkC ki)
        = rep2 familyKindDName [flav, nm, tvs, ki]

    repTySynInst :: Core TH.Name -> Core TH.TySynEqnQ -> DsM (Core TH.DecQ)
    repTySynInst (MkC nm) (MkC eqn)
        = rep2 tySynInstDName [nm, eqn]

    repClosedFamilyNoKind :: Core TH.Name
                          -> Core [TH.TyVarBndr]
                          -> Core [TH.TySynEqnQ]
                          -> DsM (Core TH.DecQ)
    repClosedFamilyNoKind (MkC nm) (MkC tvs) (MkC eqns)
        = rep2 closedTypeFamilyNoKindDName [nm, tvs, eqns]

    repClosedFamilyKind :: Core TH.Name
                        -> Core [TH.TyVarBndr]
                        -> Core TH.Kind
                        -> Core [TH.TySynEqnQ]
                        -> DsM (Core TH.DecQ)
    repClosedFamilyKind (MkC nm) (MkC tvs) (MkC ki) (MkC eqns)
        = rep2 closedTypeFamilyKindDName [nm, tvs, ki, eqns]

    repTySynEqn :: Core [TH.TypeQ] -> Core TH.TypeQ -> DsM (Core TH.TySynEqnQ)
    repTySynEqn (MkC lhs) (MkC rhs)
      = rep2 tySynEqnName [lhs, rhs]

    repRoleAnnotD :: Core TH.Name -> Core [TH.Role] -> DsM (Core TH.DecQ)
    repRoleAnnotD (MkC n) (MkC roles) = rep2 roleAnnotDName [n, roles]

    repFunDep :: Core [TH.Name] -> Core [TH.Name] -> DsM (Core TH.FunDep)
    repFunDep (MkC xs) (MkC ys) = rep2 funDepName [xs, ys]

    repProto :: Name -> Core TH.Name -> Core TH.TypeQ -> DsM (Core TH.DecQ)
    repProto mk_sig (MkC s) (MkC ty) = rep2 mk_sig [s, ty]

    repCtxt :: Core [TH.PredQ] -> DsM (Core TH.CxtQ)
    repCtxt (MkC tys) = rep2 cxtName [tys]

    repConstr :: Core TH.Name -> HsConDeclDetails Name
              -> DsM (Core TH.ConQ)
    repConstr con (PrefixCon ps)
        = do arg_tys  <- repList strictTypeQTyConName repBangTy ps
             rep2 normalCName [unC con, unC arg_tys]

    repConstr con (RecCon (L _ ips))
        = do { args <- concatMapM rep_ip ips
             ; arg_vtys <- coreList varStrictTypeQTyConName args
             ; rep2 recCName [unC con, unC arg_vtys] }
        where
          rep_ip (L _ ip) = mapM (rep_one_ip (cd_fld_type ip)) (cd_fld_names ip)
          rep_one_ip t n = do { MkC v  <- lookupLOcc n
                              ; MkC ty <- repBangTy  t
                              ; rep2 varStrictTypeName [v,ty] }

    repConstr con (InfixCon st1 st2)
        = do arg1 <- repBangTy st1
             arg2 <- repBangTy st2
             rep2 infixCName [unC arg1, unC con, unC arg2]

    ------------ Types -------------------

    repTForall :: Core [TH.TyVarBndr] -> Core TH.CxtQ -> Core TH.TypeQ
               -> DsM (Core TH.TypeQ)
    repTForall (MkC tvars) (MkC ctxt) (MkC ty)
        = rep2 forallTName [tvars, ctxt, ty]

    repTvar :: Core TH.Name -> DsM (Core TH.TypeQ)
    repTvar (MkC s) = rep2 varTName [s]

    repTapp :: Core TH.TypeQ -> Core TH.TypeQ -> DsM (Core TH.TypeQ)
    repTapp (MkC t1) (MkC t2) = rep2 appTName [t1, t2]

    repTapps :: Core TH.TypeQ -> [Core TH.TypeQ] -> DsM (Core TH.TypeQ)
    repTapps f []     = return f
    repTapps f (t:ts) = do { f1 <- repTapp f t; repTapps f1 ts }

    repTSig :: Core TH.TypeQ -> Core TH.Kind -> DsM (Core TH.TypeQ)
    repTSig (MkC ty) (MkC ki) = rep2 sigTName [ty, ki]

    repTequality :: DsM (Core TH.TypeQ)
    repTequality = rep2 equalityTName []

    repTPromotedList :: [Core TH.TypeQ] -> DsM (Core TH.TypeQ)
    repTPromotedList []     = repPromotedNilTyCon
    repTPromotedList (t:ts) = do  { tcon <- repPromotedConsTyCon
                                  ; f <- repTapp tcon t
                                  ; t' <- repTPromotedList ts
                                  ; repTapp f t'
                                  }

    repTLit :: Core TH.TyLitQ -> DsM (Core TH.TypeQ)
    repTLit (MkC lit) = rep2 litTName [lit]

    --------- Type constructors --------------

    repNamedTyCon :: Core TH.Name -> DsM (Core TH.TypeQ)
    repNamedTyCon (MkC s) = rep2 conTName [s]

    repTupleTyCon :: Int -> DsM (Core TH.TypeQ)
    -- Note: not Core Int; it's easier to be direct here
    repTupleTyCon i = do dflags <- getDynFlags
                         rep2 tupleTName [mkIntExprInt dflags i]

    repUnboxedTupleTyCon :: Int -> DsM (Core TH.TypeQ)
    -- Note: not Core Int; it's easier to be direct here
    repUnboxedTupleTyCon i = do dflags <- getDynFlags
                                rep2 unboxedTupleTName [mkIntExprInt dflags i]

    repArrowTyCon :: DsM (Core TH.TypeQ)
    repArrowTyCon = rep2 arrowTName []

    repListTyCon :: DsM (Core TH.TypeQ)
    repListTyCon = rep2 listTName []

    repPromotedTyCon :: Core TH.Name -> DsM (Core TH.TypeQ)
    repPromotedTyCon (MkC s) = rep2 promotedTName [s]

    repPromotedTupleTyCon :: Int -> DsM (Core TH.TypeQ)
    repPromotedTupleTyCon i = do dflags <- getDynFlags
                                 rep2 promotedTupleTName [mkIntExprInt dflags i]

    repPromotedNilTyCon :: DsM (Core TH.TypeQ)
    repPromotedNilTyCon = rep2 promotedNilTName []

    repPromotedConsTyCon :: DsM (Core TH.TypeQ)
    repPromotedConsTyCon = rep2 promotedConsTName []

    ------------ Kinds -------------------

    repPlainTV :: Core TH.Name -> DsM (Core TH.TyVarBndr)
    repPlainTV (MkC nm) = rep2 plainTVName [nm]

    repKindedTV :: Core TH.Name -> Core TH.Kind -> DsM (Core TH.TyVarBndr)
    repKindedTV (MkC nm) (MkC ki) = rep2 kindedTVName [nm, ki]

    repKVar :: Core TH.Name -> DsM (Core TH.Kind)
    repKVar (MkC s) = rep2 varKName [s]

    repKCon :: Core TH.Name -> DsM (Core TH.Kind)
    repKCon (MkC s) = rep2 conKName [s]

    repKTuple :: Int -> DsM (Core TH.Kind)
    repKTuple i = do dflags <- getDynFlags
                     rep2 tupleKName [mkIntExprInt dflags i]

    repKArrow :: DsM (Core TH.Kind)
    repKArrow = rep2 arrowKName []

    repKList :: DsM (Core TH.Kind)
    repKList = rep2 listKName []

    repKApp :: Core TH.Kind -> Core TH.Kind -> DsM (Core TH.Kind)
    repKApp (MkC k1) (MkC k2) = rep2 appKName [k1, k2]

    repKApps :: Core TH.Kind -> [Core TH.Kind] -> DsM (Core TH.Kind)
    repKApps f []     = return f
    repKApps f (k:ks) = do { f' <- repKApp f k; repKApps f' ks }

    repKStar :: DsM (Core TH.Kind)
    repKStar = rep2 starKName []

    repKConstraint :: DsM (Core TH.Kind)
    repKConstraint = rep2 constraintKName []

    ----------------------------------------------------------
    --              Literals

    repLiteral :: HsLit -> DsM (Core TH.Lit)
    repLiteral lit
      = do lit' <- case lit of
                       HsIntPrim _ i    -> mk_integer i
                       HsWordPrim _ w   -> mk_integer w
                       HsInt _ i        -> mk_integer i
                       HsFloatPrim r    -> mk_rational r
                       HsDoublePrim r   -> mk_rational r
                       _ -> return lit
           lit_expr <- dsLit lit'
           case mb_lit_name of
              Just lit_name -> rep2 lit_name [lit_expr]
              Nothing -> notHandled "Exotic literal" (ppr lit)
      where
        mb_lit_name = case lit of
                     HsInteger _ _ _  -> Just integerLName
                     HsInt     _ _    -> Just integerLName
                     HsIntPrim _ _    -> Just intPrimLName
                     HsWordPrim _ _   -> Just wordPrimLName
                     HsFloatPrim _    -> Just floatPrimLName
                     HsDoublePrim _   -> Just doublePrimLName
                     HsChar _ _       -> Just charLName
                     HsString _ _     -> Just stringLName
                     HsRat _ _        -> Just rationalLName
                     _                -> Nothing

    mk_integer :: Integer -> DsM HsLit
    mk_integer  i = do integer_ty <- lookupType integerTyConName
                       return $ HsInteger "" i integer_ty
    mk_rational :: FractionalLit -> DsM HsLit
    mk_rational r = do rat_ty <- lookupType rationalTyConName
                       return $ HsRat r rat_ty
    mk_string :: FastString -> DsM HsLit
    mk_string s = return $ HsString "" s

    repOverloadedLiteral :: HsOverLit Name -> DsM (Core TH.Lit)
    repOverloadedLiteral (OverLit { ol_val = val})
      = do { lit <- mk_lit val; repLiteral lit }
            -- The type Rational will be in the environment, because
            -- the smart constructor 'TH.Syntax.rationalL' uses it in its type,
            -- and rationalL is sucked in when any TH stuff is used

    mk_lit :: OverLitVal -> DsM HsLit
    mk_lit (HsIntegral _ i)   = mk_integer  i
    mk_lit (HsFractional f)   = mk_rational f
    mk_lit (HsIsString _ s)   = mk_string   s

    --------------- Miscellaneous -------------------

    repGensym :: Core String -> DsM (Core (TH.Q TH.Name))
    repGensym (MkC lit_str) = rep2 newNameName [lit_str]

    repBindQ :: Type -> Type        -- a and b
             -> Core (TH.Q a) -> Core (a -> TH.Q b) -> DsM (Core (TH.Q b))
    repBindQ ty_a ty_b (MkC x) (MkC y)
      = rep2 bindQName [Type ty_a, Type ty_b, x, y]

    repSequenceQ :: Type -> Core [TH.Q a] -> DsM (Core (TH.Q [a]))
    repSequenceQ ty_a (MkC list)
      = rep2 sequenceQName [Type ty_a, list]

    ------------ Lists and Tuples -------------------
    -- turn a list of patterns into a single pattern matching a list

    repList :: Name -> (a  -> DsM (Core b))
                    -> [a] -> DsM (Core [b])
    repList tc_name f args
      = do { args1 <- mapM f args
           ; coreList tc_name args1 }

    coreList :: Name        -- Of the TyCon of the element type
             -> [Core a] -> DsM (Core [a])
    coreList tc_name es
      = do { elt_ty <- lookupType tc_name; return (coreList' elt_ty es) }

    coreList' :: Type       -- The element type
              -> [Core a] -> Core [a]
    coreList' elt_ty es = MkC (mkListExpr elt_ty (map unC es ))

    nonEmptyCoreList :: [Core a] -> Core [a]
      -- The list must be non-empty so we can get the element type
      -- Otherwise use coreList
    nonEmptyCoreList []           = panic "coreList: empty argument"
    nonEmptyCoreList xs@(MkC x:_) = MkC (mkListExpr (exprType x) (map unC xs))

    coreStringLit :: String -> DsM (Core String)
    coreStringLit s = do { z <- mkStringExpr s; return(MkC z) }

    ------------ Literals & Variables -------------------

    coreIntLit :: Int -> DsM (Core Int)
    coreIntLit i = do dflags <- getDynFlags
                      return (MkC (mkIntExprInt dflags i))

    coreVar :: Id -> Core TH.Name   -- The Id has type Name
    coreVar id = MkC (Var id)

    ----------------- Failure -----------------------
    notHandledL :: SrcSpan -> String -> SDoc -> DsM a
    notHandledL loc what doc
      | isGoodSrcSpan loc
      = putSrcSpanDs loc $ notHandled what doc
      | otherwise
      = notHandled what doc

    notHandled :: String -> SDoc -> DsM a
    notHandled what doc = failWithDs msg
      where
        msg = hang (text what <+> ptext (sLit "not (yet) handled by Template Haskell"))
                 2 doc

    -- %************************************************************************
    -- %*                                                                   *
    --              The known-key names for Template Haskell
    -- %*                                                                   *
    -- %************************************************************************

    -- To add a name, do three things
    --
    --  1) Allocate a key
    --  2) Make a "Name"
    --  3) Add the name to knownKeyNames

    templateHaskellNames :: [Name]
    -- The names that are implicitly mentioned by ``bracket''
    -- Should stay in sync with the import list of DsMeta

    templateHaskellNames = [
        returnQName, bindQName, sequenceQName, newNameName, liftName,
        mkNameName, mkNameG_vName, mkNameG_dName, mkNameG_tcName, mkNameLName,
        liftStringName,
        unTypeName,
        unTypeQName,
        unsafeTExpCoerceName,

        -- Lit
        charLName, stringLName, integerLName, intPrimLName, wordPrimLName,
        floatPrimLName, doublePrimLName, rationalLName,
        -- Pat
        litPName, varPName, tupPName, unboxedTupPName,
        conPName, tildePName, bangPName, infixPName,
        asPName, wildPName, recPName, listPName, sigPName, viewPName,
        -- FieldPat
        fieldPatName,
        -- Match
        matchName,
        -- Clause
        clauseName,
        -- Exp
        varEName, conEName, litEName, appEName, infixEName,
        infixAppName, sectionLName, sectionRName, lamEName, lamCaseEName,
        tupEName, unboxedTupEName,
        condEName, multiIfEName, letEName, caseEName, doEName, compEName,
        fromEName, fromThenEName, fromToEName, fromThenToEName,
        listEName, sigEName, recConEName, recUpdEName, staticEName,
        -- FieldExp
        fieldExpName,
        -- Body
        guardedBName, normalBName,
        -- Guard
        normalGEName, patGEName,
        -- Stmt
        bindSName, letSName, noBindSName, parSName,
        -- Dec
        funDName, valDName, dataDName, newtypeDName, tySynDName,
        classDName, instanceDName, standaloneDerivDName, sigDName, forImpDName,
        pragInlDName, pragSpecDName, pragSpecInlDName, pragSpecInstDName,
        pragRuleDName, pragAnnDName, defaultSigDName,
        familyNoKindDName, familyKindDName, dataInstDName, newtypeInstDName,
        tySynInstDName, closedTypeFamilyKindDName, closedTypeFamilyNoKindDName,
        infixLDName, infixRDName, infixNDName,
        roleAnnotDName,
        -- Cxt
        cxtName,
        -- Strict
        isStrictName, notStrictName, unpackedName,
        -- Con
        normalCName, recCName, infixCName, forallCName,
        -- StrictType
        strictTypeName,
        -- VarStrictType
        varStrictTypeName,
        -- Type
        forallTName, varTName, conTName, appTName, equalityTName,
        tupleTName, unboxedTupleTName, arrowTName, listTName, sigTName, litTName,
        promotedTName, promotedTupleTName, promotedNilTName, promotedConsTName,
        -- TyLit
        numTyLitName, strTyLitName,
        -- TyVarBndr
        plainTVName, kindedTVName,
        -- Role
        nominalRName, representationalRName, phantomRName, inferRName,
        -- Kind
        varKName, conKName, tupleKName, arrowKName, listKName, appKName,
        starKName, constraintKName,
        -- Callconv
        cCallName, stdCallName, cApiCallName, primCallName, javaScriptCallName,
        -- Safety
        unsafeName,
        safeName,
        interruptibleName,
        -- Inline
        noInlineDataConName, inlineDataConName, inlinableDataConName,
        -- RuleMatch
        conLikeDataConName, funLikeDataConName,
        -- Phases
        allPhasesDataConName, fromPhaseDataConName, beforePhaseDataConName,
        -- TExp
        tExpDataConName,
        -- RuleBndr
        ruleVarName, typedRuleVarName,
        -- FunDep
        funDepName,
        -- FamFlavour
        typeFamName, dataFamName,
        -- TySynEqn
        tySynEqnName,
        -- AnnTarget
        valueAnnotationName, typeAnnotationName, moduleAnnotationName,

        -- And the tycons
        qTyConName, nameTyConName, patTyConName, fieldPatTyConName, matchQTyConName,
        clauseQTyConName, expQTyConName, fieldExpTyConName, predTyConName,
        stmtQTyConName, decQTyConName, conQTyConName, strictTypeQTyConName,
        varStrictTypeQTyConName, typeQTyConName, expTyConName, decTyConName,
        typeTyConName, tyVarBndrTyConName, matchTyConName, clauseTyConName,
        patQTyConName, fieldPatQTyConName, fieldExpQTyConName, funDepTyConName,
        predQTyConName, decsQTyConName, ruleBndrQTyConName, tySynEqnQTyConName,
        roleTyConName, tExpTyConName,

        -- Quasiquoting
        quoteDecName, quoteTypeName, quoteExpName, quotePatName]

    thSyn, thLib, qqLib :: Module
    thSyn = mkTHModule (fsLit "Language.Haskell.TH.Syntax")
    thLib = mkTHModule (fsLit "Language.Haskell.TH.Lib")
    qqLib = mkTHModule (fsLit "Language.Haskell.TH.Quote")

    mkTHModule :: FastString -> Module
    mkTHModule m = mkModule thPackageKey (mkModuleNameFS m)

    libFun, libTc, thFun, thTc, thCon, qqFun :: FastString -> Unique -> Name
    libFun = mk_known_key_name OccName.varName  thLib
    libTc  = mk_known_key_name OccName.tcName   thLib
    thFun  = mk_known_key_name OccName.varName  thSyn
    thTc   = mk_known_key_name OccName.tcName   thSyn
    thCon  = mk_known_key_name OccName.dataName thSyn
    qqFun  = mk_known_key_name OccName.varName  qqLib

    -------------------- TH.Syntax -----------------------
    qTyConName, nameTyConName, fieldExpTyConName, patTyConName,
        fieldPatTyConName, expTyConName, decTyConName, typeTyConName,
        tyVarBndrTyConName, matchTyConName, clauseTyConName, funDepTyConName,
        predTyConName, tExpTyConName :: Name
    qTyConName        = thTc (fsLit "Q")            qTyConKey
    nameTyConName     = thTc (fsLit "Name")         nameTyConKey
    fieldExpTyConName = thTc (fsLit "FieldExp")     fieldExpTyConKey
    patTyConName      = thTc (fsLit "Pat")          patTyConKey
    fieldPatTyConName = thTc (fsLit "FieldPat")     fieldPatTyConKey
    expTyConName      = thTc (fsLit "Exp")          expTyConKey
    decTyConName      = thTc (fsLit "Dec")          decTyConKey
    typeTyConName     = thTc (fsLit "Type")         typeTyConKey
    tyVarBndrTyConName= thTc (fsLit "TyVarBndr")    tyVarBndrTyConKey
    matchTyConName    = thTc (fsLit "Match")        matchTyConKey
    clauseTyConName   = thTc (fsLit "Clause")       clauseTyConKey
    funDepTyConName   = thTc (fsLit "FunDep")       funDepTyConKey
    predTyConName     = thTc (fsLit "Pred")         predTyConKey
    tExpTyConName     = thTc (fsLit "TExp")         tExpTyConKey

    returnQName, bindQName, sequenceQName, newNameName, liftName,
        mkNameName, mkNameG_vName, mkNameG_dName, mkNameG_tcName,
        mkNameLName, liftStringName, unTypeName, unTypeQName,
        unsafeTExpCoerceName :: Name
    returnQName    = thFun (fsLit "returnQ")   returnQIdKey
    bindQName      = thFun (fsLit "bindQ")     bindQIdKey
    sequenceQName  = thFun (fsLit "sequenceQ") sequenceQIdKey
    newNameName    = thFun (fsLit "newName")   newNameIdKey
    liftName       = thFun (fsLit "lift")      liftIdKey
    liftStringName = thFun (fsLit "liftString")  liftStringIdKey
    mkNameName     = thFun (fsLit "mkName")     mkNameIdKey
    mkNameG_vName  = thFun (fsLit "mkNameG_v")  mkNameG_vIdKey
    mkNameG_dName  = thFun (fsLit "mkNameG_d")  mkNameG_dIdKey
    mkNameG_tcName = thFun (fsLit "mkNameG_tc") mkNameG_tcIdKey
    mkNameLName    = thFun (fsLit "mkNameL")    mkNameLIdKey
    unTypeName     = thFun (fsLit "unType")     unTypeIdKey
    unTypeQName    = thFun (fsLit "unTypeQ")    unTypeQIdKey
    unsafeTExpCoerceName = thFun (fsLit "unsafeTExpCoerce") unsafeTExpCoerceIdKey

    -------------------- TH.Lib -----------------------
    -- data Lit = ...
    charLName, stringLName, integerLName, intPrimLName, wordPrimLName,
        floatPrimLName, doublePrimLName, rationalLName :: Name
    charLName       = libFun (fsLit "charL")       charLIdKey
    stringLName     = libFun (fsLit "stringL")     stringLIdKey
    integerLName    = libFun (fsLit "integerL")    integerLIdKey
    intPrimLName    = libFun (fsLit "intPrimL")    intPrimLIdKey
    wordPrimLName   = libFun (fsLit "wordPrimL")   wordPrimLIdKey
    floatPrimLName  = libFun (fsLit "floatPrimL")  floatPrimLIdKey
    doublePrimLName = libFun (fsLit "doublePrimL") doublePrimLIdKey
    rationalLName   = libFun (fsLit "rationalL")     rationalLIdKey

    -- data Pat = ...
    litPName, varPName, tupPName, unboxedTupPName, conPName, infixPName, tildePName, bangPName,
        asPName, wildPName, recPName, listPName, sigPName, viewPName :: Name
    litPName   = libFun (fsLit "litP")   litPIdKey
    varPName   = libFun (fsLit "varP")   varPIdKey
    tupPName   = libFun (fsLit "tupP")   tupPIdKey
    unboxedTupPName = libFun (fsLit "unboxedTupP") unboxedTupPIdKey
    conPName   = libFun (fsLit "conP")   conPIdKey
    infixPName = libFun (fsLit "infixP") infixPIdKey
    tildePName = libFun (fsLit "tildeP") tildePIdKey
    bangPName  = libFun (fsLit "bangP")  bangPIdKey
    asPName    = libFun (fsLit "asP")    asPIdKey
    wildPName  = libFun (fsLit "wildP")  wildPIdKey
    recPName   = libFun (fsLit "recP")   recPIdKey
    listPName  = libFun (fsLit "listP")  listPIdKey
    sigPName   = libFun (fsLit "sigP")   sigPIdKey
    viewPName  = libFun (fsLit "viewP")  viewPIdKey

    -- type FieldPat = ...
    fieldPatName :: Name
    fieldPatName = libFun (fsLit "fieldPat") fieldPatIdKey

    -- data Match = ...
    matchName :: Name
    matchName = libFun (fsLit "match") matchIdKey

    -- data Clause = ...
    clauseName :: Name
    clauseName = libFun (fsLit "clause") clauseIdKey

    -- data Exp = ...
    varEName, conEName, litEName, appEName, infixEName, infixAppName,
        sectionLName, sectionRName, lamEName, lamCaseEName, tupEName,
        unboxedTupEName, condEName, multiIfEName, letEName, caseEName,
        doEName, compEName, staticEName :: Name
    varEName        = libFun (fsLit "varE")        varEIdKey
    conEName        = libFun (fsLit "conE")        conEIdKey
    litEName        = libFun (fsLit "litE")        litEIdKey
    appEName        = libFun (fsLit "appE")        appEIdKey
    infixEName      = libFun (fsLit "infixE")      infixEIdKey
    infixAppName    = libFun (fsLit "infixApp")    infixAppIdKey
    sectionLName    = libFun (fsLit "sectionL")    sectionLIdKey
    sectionRName    = libFun (fsLit "sectionR")    sectionRIdKey
    lamEName        = libFun (fsLit "lamE")        lamEIdKey
    lamCaseEName    = libFun (fsLit "lamCaseE")    lamCaseEIdKey
    tupEName        = libFun (fsLit "tupE")        tupEIdKey
    unboxedTupEName = libFun (fsLit "unboxedTupE") unboxedTupEIdKey
    condEName       = libFun (fsLit "condE")       condEIdKey
    multiIfEName    = libFun (fsLit "multiIfE")    multiIfEIdKey
    letEName        = libFun (fsLit "letE")        letEIdKey
    caseEName       = libFun (fsLit "caseE")       caseEIdKey
    doEName         = libFun (fsLit "doE")         doEIdKey
    compEName       = libFun (fsLit "compE")       compEIdKey
    -- ArithSeq skips a level
    fromEName, fromThenEName, fromToEName, fromThenToEName :: Name
    fromEName       = libFun (fsLit "fromE")       fromEIdKey
    fromThenEName   = libFun (fsLit "fromThenE")   fromThenEIdKey
    fromToEName     = libFun (fsLit "fromToE")     fromToEIdKey
    fromThenToEName = libFun (fsLit "fromThenToE") fromThenToEIdKey
    -- end ArithSeq
    listEName, sigEName, recConEName, recUpdEName :: Name
    listEName       = libFun (fsLit "listE")       listEIdKey
    sigEName        = libFun (fsLit "sigE")        sigEIdKey
    recConEName     = libFun (fsLit "recConE")     recConEIdKey
    recUpdEName     = libFun (fsLit "recUpdE")     recUpdEIdKey
    staticEName     = libFun (fsLit "staticE")     staticEIdKey

    -- type FieldExp = ...
    fieldExpName :: Name
    fieldExpName = libFun (fsLit "fieldExp") fieldExpIdKey

    -- data Body = ...
    guardedBName, normalBName :: Name
    guardedBName = libFun (fsLit "guardedB") guardedBIdKey
    normalBName  = libFun (fsLit "normalB")  normalBIdKey

    -- data Guard = ...
    normalGEName, patGEName :: Name
    normalGEName = libFun (fsLit "normalGE") normalGEIdKey
    patGEName    = libFun (fsLit "patGE")    patGEIdKey

    -- data Stmt = ...
    bindSName, letSName, noBindSName, parSName :: Name
    bindSName   = libFun (fsLit "bindS")   bindSIdKey
    letSName    = libFun (fsLit "letS")    letSIdKey
    noBindSName = libFun (fsLit "noBindS") noBindSIdKey
    parSName    = libFun (fsLit "parS")    parSIdKey

    -- data Dec = ...
    funDName, valDName, dataDName, newtypeDName, tySynDName, classDName,
        instanceDName, sigDName, forImpDName, pragInlDName, pragSpecDName,
        pragSpecInlDName, pragSpecInstDName, pragRuleDName, pragAnnDName,
        familyNoKindDName, standaloneDerivDName, defaultSigDName,
        familyKindDName, dataInstDName, newtypeInstDName, tySynInstDName,
        closedTypeFamilyKindDName, closedTypeFamilyNoKindDName,
        infixLDName, infixRDName, infixNDName, roleAnnotDName :: Name
    funDName          = libFun (fsLit "funD")          funDIdKey
    valDName          = libFun (fsLit "valD")          valDIdKey
    dataDName         = libFun (fsLit "dataD")         dataDIdKey
    newtypeDName      = libFun (fsLit "newtypeD")      newtypeDIdKey
    tySynDName        = libFun (fsLit "tySynD")        tySynDIdKey
    classDName        = libFun (fsLit "classD")        classDIdKey
    instanceDName     = libFun (fsLit "instanceD")     instanceDIdKey
    standaloneDerivDName
                      = libFun (fsLit "standaloneDerivD") standaloneDerivDIdKey
    sigDName          = libFun (fsLit "sigD")          sigDIdKey
    defaultSigDName   = libFun (fsLit "defaultSigD")   defaultSigDIdKey
    forImpDName       = libFun (fsLit "forImpD")       forImpDIdKey
    pragInlDName      = libFun (fsLit "pragInlD")      pragInlDIdKey
    pragSpecDName     = libFun (fsLit "pragSpecD")     pragSpecDIdKey
    pragSpecInlDName  = libFun (fsLit "pragSpecInlD")  pragSpecInlDIdKey
    pragSpecInstDName = libFun (fsLit "pragSpecInstD") pragSpecInstDIdKey
    pragRuleDName     = libFun (fsLit "pragRuleD")     pragRuleDIdKey
    pragAnnDName      = libFun (fsLit "pragAnnD")      pragAnnDIdKey
    familyNoKindDName = libFun (fsLit "familyNoKindD") familyNoKindDIdKey
    familyKindDName   = libFun (fsLit "familyKindD")   familyKindDIdKey
    dataInstDName     = libFun (fsLit "dataInstD")     dataInstDIdKey
    newtypeInstDName  = libFun (fsLit "newtypeInstD")  newtypeInstDIdKey
    tySynInstDName    = libFun (fsLit "tySynInstD")    tySynInstDIdKey
    closedTypeFamilyKindDName
                      = libFun (fsLit "closedTypeFamilyKindD") closedTypeFamilyKindDIdKey
    closedTypeFamilyNoKindDName
                      = libFun (fsLit "closedTypeFamilyNoKindD") closedTypeFamilyNoKindDIdKey
    infixLDName       = libFun (fsLit "infixLD")       infixLDIdKey
    infixRDName       = libFun (fsLit "infixRD")       infixRDIdKey
    infixNDName       = libFun (fsLit "infixND")       infixNDIdKey
    roleAnnotDName    = libFun (fsLit "roleAnnotD")    roleAnnotDIdKey

    -- type Ctxt = ...
    cxtName :: Name
    cxtName = libFun (fsLit "cxt") cxtIdKey

    -- data Strict = ...
    isStrictName, notStrictName, unpackedName :: Name
    isStrictName      = libFun  (fsLit "isStrict")      isStrictKey
    notStrictName     = libFun  (fsLit "notStrict")     notStrictKey
    unpackedName      = libFun  (fsLit "unpacked")      unpackedKey

    -- data Con = ...
    normalCName, recCName, infixCName, forallCName :: Name
    normalCName = libFun (fsLit "normalC") normalCIdKey
    recCName    = libFun (fsLit "recC")    recCIdKey
    infixCName  = libFun (fsLit "infixC")  infixCIdKey
    forallCName  = libFun (fsLit "forallC")  forallCIdKey

    -- type StrictType = ...
    strictTypeName :: Name
    strictTypeName    = libFun  (fsLit "strictType")    strictTKey

    -- type VarStrictType = ...
    varStrictTypeName :: Name
    varStrictTypeName = libFun  (fsLit "varStrictType") varStrictTKey

    -- data Type = ...
    forallTName, varTName, conTName, tupleTName, unboxedTupleTName, arrowTName,
        listTName, appTName, sigTName, equalityTName, litTName,
        promotedTName, promotedTupleTName,
        promotedNilTName, promotedConsTName :: Name
    forallTName         = libFun (fsLit "forallT")        forallTIdKey
    varTName            = libFun (fsLit "varT")           varTIdKey
    conTName            = libFun (fsLit "conT")           conTIdKey
    tupleTName          = libFun (fsLit "tupleT")         tupleTIdKey
    unboxedTupleTName   = libFun (fsLit "unboxedTupleT")  unboxedTupleTIdKey
    arrowTName          = libFun (fsLit "arrowT")         arrowTIdKey
    listTName           = libFun (fsLit "listT")          listTIdKey
    appTName            = libFun (fsLit "appT")           appTIdKey
    sigTName            = libFun (fsLit "sigT")           sigTIdKey
    equalityTName       = libFun (fsLit "equalityT")      equalityTIdKey
    litTName            = libFun (fsLit "litT")           litTIdKey
    promotedTName       = libFun (fsLit "promotedT")      promotedTIdKey
    promotedTupleTName  = libFun (fsLit "promotedTupleT") promotedTupleTIdKey
    promotedNilTName    = libFun (fsLit "promotedNilT")   promotedNilTIdKey
    promotedConsTName   = libFun (fsLit "promotedConsT")  promotedConsTIdKey

    -- data TyLit = ...
    numTyLitName, strTyLitName :: Name
    numTyLitName = libFun (fsLit "numTyLit") numTyLitIdKey
    strTyLitName = libFun (fsLit "strTyLit") strTyLitIdKey

    -- data TyVarBndr = ...
    plainTVName, kindedTVName :: Name
    plainTVName       = libFun (fsLit "plainTV")       plainTVIdKey
    kindedTVName      = libFun (fsLit "kindedTV")      kindedTVIdKey

    -- data Role = ...
    nominalRName, representationalRName, phantomRName, inferRName :: Name
    nominalRName          = libFun (fsLit "nominalR")          nominalRIdKey
    representationalRName = libFun (fsLit "representationalR") representationalRIdKey
    phantomRName          = libFun (fsLit "phantomR")          phantomRIdKey
    inferRName            = libFun (fsLit "inferR")            inferRIdKey

    -- data Kind = ...
    varKName, conKName, tupleKName, arrowKName, listKName, appKName,
      starKName, constraintKName :: Name
    varKName        = libFun (fsLit "varK")         varKIdKey
    conKName        = libFun (fsLit "conK")         conKIdKey
    tupleKName      = libFun (fsLit "tupleK")       tupleKIdKey
    arrowKName      = libFun (fsLit "arrowK")       arrowKIdKey
    listKName       = libFun (fsLit "listK")        listKIdKey
    appKName        = libFun (fsLit "appK")         appKIdKey
    starKName       = libFun (fsLit "starK")        starKIdKey
    constraintKName = libFun (fsLit "constraintK")  constraintKIdKey

    -- data Callconv = ...
    cCallName, stdCallName, cApiCallName, primCallName, javaScriptCallName :: Name
    cCallName = libFun (fsLit "cCall") cCallIdKey
    stdCallName = libFun (fsLit "stdCall") stdCallIdKey
    cApiCallName = libFun (fsLit "cApi") cApiCallIdKey
    primCallName = libFun (fsLit "prim") primCallIdKey
    javaScriptCallName = libFun (fsLit "javaScript") javaScriptCallIdKey

    -- data Safety = ...
    unsafeName, safeName, interruptibleName :: Name
    unsafeName     = libFun (fsLit "unsafe") unsafeIdKey
    safeName       = libFun (fsLit "safe") safeIdKey
    interruptibleName = libFun (fsLit "interruptible") interruptibleIdKey

    -- data Inline = ...
    noInlineDataConName, inlineDataConName, inlinableDataConName :: Name
    noInlineDataConName  = thCon (fsLit "NoInline")  noInlineDataConKey
    inlineDataConName    = thCon (fsLit "Inline")    inlineDataConKey
    inlinableDataConName = thCon (fsLit "Inlinable") inlinableDataConKey

    -- data RuleMatch = ...
    conLikeDataConName, funLikeDataConName :: Name
    conLikeDataConName = thCon (fsLit "ConLike") conLikeDataConKey
    funLikeDataConName = thCon (fsLit "FunLike") funLikeDataConKey

    -- data Phases = ...
    allPhasesDataConName, fromPhaseDataConName, beforePhaseDataConName :: Name
    allPhasesDataConName   = thCon (fsLit "AllPhases")   allPhasesDataConKey
    fromPhaseDataConName   = thCon (fsLit "FromPhase")   fromPhaseDataConKey
    beforePhaseDataConName = thCon (fsLit "BeforePhase") beforePhaseDataConKey

    -- newtype TExp a = ...
    tExpDataConName :: Name
    tExpDataConName = thCon (fsLit "TExp") tExpDataConKey

    -- data RuleBndr = ...
    ruleVarName, typedRuleVarName :: Name
    ruleVarName      = libFun (fsLit ("ruleVar"))      ruleVarIdKey
    typedRuleVarName = libFun (fsLit ("typedRuleVar")) typedRuleVarIdKey

    -- data FunDep = ...
    funDepName :: Name
    funDepName     = libFun (fsLit "funDep") funDepIdKey

    -- data FamFlavour = ...
    typeFamName, dataFamName :: Name
    typeFamName = libFun (fsLit "typeFam") typeFamIdKey
    dataFamName = libFun (fsLit "dataFam") dataFamIdKey

    -- data TySynEqn = ...
    tySynEqnName :: Name
    tySynEqnName = libFun (fsLit "tySynEqn") tySynEqnIdKey

    -- data AnnTarget = ...
    valueAnnotationName, typeAnnotationName, moduleAnnotationName :: Name
    valueAnnotationName  = libFun (fsLit "valueAnnotation")  valueAnnotationIdKey
    typeAnnotationName   = libFun (fsLit "typeAnnotation")   typeAnnotationIdKey
    moduleAnnotationName = libFun (fsLit "moduleAnnotation") moduleAnnotationIdKey

    matchQTyConName, clauseQTyConName, expQTyConName, stmtQTyConName,
        decQTyConName, conQTyConName, strictTypeQTyConName,
        varStrictTypeQTyConName, typeQTyConName, fieldExpQTyConName,
        patQTyConName, fieldPatQTyConName, predQTyConName, decsQTyConName,
        ruleBndrQTyConName, tySynEqnQTyConName, roleTyConName :: Name
    matchQTyConName         = libTc (fsLit "MatchQ")         matchQTyConKey
    clauseQTyConName        = libTc (fsLit "ClauseQ")        clauseQTyConKey
    expQTyConName           = libTc (fsLit "ExpQ")           expQTyConKey
    stmtQTyConName          = libTc (fsLit "StmtQ")          stmtQTyConKey
    decQTyConName           = libTc (fsLit "DecQ")           decQTyConKey
    decsQTyConName          = libTc (fsLit "DecsQ")          decsQTyConKey  -- Q [Dec]
    conQTyConName           = libTc (fsLit "ConQ")           conQTyConKey
    strictTypeQTyConName    = libTc (fsLit "StrictTypeQ")    strictTypeQTyConKey
    varStrictTypeQTyConName = libTc (fsLit "VarStrictTypeQ") varStrictTypeQTyConKey
    typeQTyConName          = libTc (fsLit "TypeQ")          typeQTyConKey
    fieldExpQTyConName      = libTc (fsLit "FieldExpQ")      fieldExpQTyConKey
    patQTyConName           = libTc (fsLit "PatQ")           patQTyConKey
    fieldPatQTyConName      = libTc (fsLit "FieldPatQ")      fieldPatQTyConKey
    predQTyConName          = libTc (fsLit "PredQ")          predQTyConKey
    ruleBndrQTyConName      = libTc (fsLit "RuleBndrQ")      ruleBndrQTyConKey
    tySynEqnQTyConName      = libTc (fsLit "TySynEqnQ")      tySynEqnQTyConKey
    roleTyConName           = libTc (fsLit "Role")           roleTyConKey

    -- quasiquoting
    quoteExpName, quotePatName, quoteDecName, quoteTypeName :: Name
    quoteExpName        = qqFun (fsLit "quoteExp")  quoteExpKey
    quotePatName        = qqFun (fsLit "quotePat")  quotePatKey
    quoteDecName        = qqFun (fsLit "quoteDec")  quoteDecKey
    quoteTypeName       = qqFun (fsLit "quoteType") quoteTypeKey

    -- TyConUniques available: 200-299
    -- Check in PrelNames if you want to change this

    expTyConKey, matchTyConKey, clauseTyConKey, qTyConKey, expQTyConKey,
        decQTyConKey, patTyConKey, matchQTyConKey, clauseQTyConKey,
        stmtQTyConKey, conQTyConKey, typeQTyConKey, typeTyConKey, tyVarBndrTyConKey,
        decTyConKey, varStrictTypeQTyConKey, strictTypeQTyConKey,
        fieldExpTyConKey, fieldPatTyConKey, nameTyConKey, patQTyConKey,
        fieldPatQTyConKey, fieldExpQTyConKey, funDepTyConKey, predTyConKey,
        predQTyConKey, decsQTyConKey, ruleBndrQTyConKey, tySynEqnQTyConKey,
        roleTyConKey, tExpTyConKey :: Unique
    expTyConKey             = mkPreludeTyConUnique 200
    matchTyConKey           = mkPreludeTyConUnique 201
    clauseTyConKey          = mkPreludeTyConUnique 202
    qTyConKey               = mkPreludeTyConUnique 203
    expQTyConKey            = mkPreludeTyConUnique 204
    decQTyConKey            = mkPreludeTyConUnique 205
    patTyConKey             = mkPreludeTyConUnique 206
    matchQTyConKey          = mkPreludeTyConUnique 207
    clauseQTyConKey         = mkPreludeTyConUnique 208
    stmtQTyConKey           = mkPreludeTyConUnique 209
    conQTyConKey            = mkPreludeTyConUnique 210
    typeQTyConKey           = mkPreludeTyConUnique 211
    typeTyConKey            = mkPreludeTyConUnique 212
    decTyConKey             = mkPreludeTyConUnique 213
    varStrictTypeQTyConKey  = mkPreludeTyConUnique 214
    strictTypeQTyConKey     = mkPreludeTyConUnique 215
    fieldExpTyConKey        = mkPreludeTyConUnique 216
    fieldPatTyConKey        = mkPreludeTyConUnique 217
    nameTyConKey            = mkPreludeTyConUnique 218
    patQTyConKey            = mkPreludeTyConUnique 219
    fieldPatQTyConKey       = mkPreludeTyConUnique 220
    fieldExpQTyConKey       = mkPreludeTyConUnique 221
    funDepTyConKey          = mkPreludeTyConUnique 222
    predTyConKey            = mkPreludeTyConUnique 223
    predQTyConKey           = mkPreludeTyConUnique 224
    tyVarBndrTyConKey       = mkPreludeTyConUnique 225
    decsQTyConKey           = mkPreludeTyConUnique 226
    ruleBndrQTyConKey       = mkPreludeTyConUnique 227
    tySynEqnQTyConKey       = mkPreludeTyConUnique 228
    roleTyConKey            = mkPreludeTyConUnique 229
    tExpTyConKey            = mkPreludeTyConUnique 230

    -- IdUniques available: 200-499
    -- If you want to change this, make sure you check in PrelNames

    returnQIdKey, bindQIdKey, sequenceQIdKey, liftIdKey, newNameIdKey,
        mkNameIdKey, mkNameG_vIdKey, mkNameG_dIdKey, mkNameG_tcIdKey,
        mkNameLIdKey, unTypeIdKey, unTypeQIdKey, unsafeTExpCoerceIdKey :: Unique
    returnQIdKey        = mkPreludeMiscIdUnique 200
    bindQIdKey          = mkPreludeMiscIdUnique 201
    sequenceQIdKey      = mkPreludeMiscIdUnique 202
    liftIdKey           = mkPreludeMiscIdUnique 203
    newNameIdKey         = mkPreludeMiscIdUnique 204
    mkNameIdKey          = mkPreludeMiscIdUnique 205
    mkNameG_vIdKey       = mkPreludeMiscIdUnique 206
    mkNameG_dIdKey       = mkPreludeMiscIdUnique 207
    mkNameG_tcIdKey      = mkPreludeMiscIdUnique 208
    mkNameLIdKey         = mkPreludeMiscIdUnique 209
    unTypeIdKey          = mkPreludeMiscIdUnique 210
    unTypeQIdKey         = mkPreludeMiscIdUnique 211
    unsafeTExpCoerceIdKey = mkPreludeMiscIdUnique 212

    -- data Lit = ...
    charLIdKey, stringLIdKey, integerLIdKey, intPrimLIdKey, wordPrimLIdKey,
        floatPrimLIdKey, doublePrimLIdKey, rationalLIdKey :: Unique
    charLIdKey        = mkPreludeMiscIdUnique 220
    stringLIdKey      = mkPreludeMiscIdUnique 221
    integerLIdKey     = mkPreludeMiscIdUnique 222
    intPrimLIdKey     = mkPreludeMiscIdUnique 223
    wordPrimLIdKey    = mkPreludeMiscIdUnique 224
    floatPrimLIdKey   = mkPreludeMiscIdUnique 225
    doublePrimLIdKey  = mkPreludeMiscIdUnique 226
    rationalLIdKey    = mkPreludeMiscIdUnique 227

    liftStringIdKey :: Unique
    liftStringIdKey     = mkPreludeMiscIdUnique 228

    -- data Pat = ...
    litPIdKey, varPIdKey, tupPIdKey, unboxedTupPIdKey, conPIdKey, infixPIdKey, tildePIdKey, bangPIdKey,
        asPIdKey, wildPIdKey, recPIdKey, listPIdKey, sigPIdKey, viewPIdKey :: Unique
    litPIdKey         = mkPreludeMiscIdUnique 240
    varPIdKey         = mkPreludeMiscIdUnique 241
    tupPIdKey         = mkPreludeMiscIdUnique 242
    unboxedTupPIdKey  = mkPreludeMiscIdUnique 243
    conPIdKey         = mkPreludeMiscIdUnique 244
    infixPIdKey       = mkPreludeMiscIdUnique 245
    tildePIdKey       = mkPreludeMiscIdUnique 246
    bangPIdKey        = mkPreludeMiscIdUnique 247
    asPIdKey          = mkPreludeMiscIdUnique 248
    wildPIdKey        = mkPreludeMiscIdUnique 249
    recPIdKey         = mkPreludeMiscIdUnique 250
    listPIdKey        = mkPreludeMiscIdUnique 251
    sigPIdKey         = mkPreludeMiscIdUnique 252
    viewPIdKey        = mkPreludeMiscIdUnique 253

    -- type FieldPat = ...
    fieldPatIdKey :: Unique
    fieldPatIdKey       = mkPreludeMiscIdUnique 260

    -- data Match = ...
    matchIdKey :: Unique
    matchIdKey          = mkPreludeMiscIdUnique 261

    -- data Clause = ...
    clauseIdKey :: Unique
    clauseIdKey         = mkPreludeMiscIdUnique 262

    -- data Exp = ...
    varEIdKey, conEIdKey, litEIdKey, appEIdKey, infixEIdKey, infixAppIdKey,
        sectionLIdKey, sectionRIdKey, lamEIdKey, lamCaseEIdKey, tupEIdKey,
        unboxedTupEIdKey, condEIdKey, multiIfEIdKey,
        letEIdKey, caseEIdKey, doEIdKey, compEIdKey,
        fromEIdKey, fromThenEIdKey, fromToEIdKey, fromThenToEIdKey,
        listEIdKey, sigEIdKey, recConEIdKey, recUpdEIdKey, staticEIdKey :: Unique
    varEIdKey         = mkPreludeMiscIdUnique 270
    conEIdKey         = mkPreludeMiscIdUnique 271
    litEIdKey         = mkPreludeMiscIdUnique 272
    appEIdKey         = mkPreludeMiscIdUnique 273
    infixEIdKey       = mkPreludeMiscIdUnique 274
    infixAppIdKey     = mkPreludeMiscIdUnique 275
    sectionLIdKey     = mkPreludeMiscIdUnique 276
    sectionRIdKey     = mkPreludeMiscIdUnique 277
    lamEIdKey         = mkPreludeMiscIdUnique 278
    lamCaseEIdKey     = mkPreludeMiscIdUnique 279
    tupEIdKey         = mkPreludeMiscIdUnique 280
    unboxedTupEIdKey  = mkPreludeMiscIdUnique 281
    condEIdKey        = mkPreludeMiscIdUnique 282
    multiIfEIdKey     = mkPreludeMiscIdUnique 283
    letEIdKey         = mkPreludeMiscIdUnique 284
    caseEIdKey        = mkPreludeMiscIdUnique 285
    doEIdKey          = mkPreludeMiscIdUnique 286
    compEIdKey        = mkPreludeMiscIdUnique 287
    fromEIdKey        = mkPreludeMiscIdUnique 288
    fromThenEIdKey    = mkPreludeMiscIdUnique 289
    fromToEIdKey      = mkPreludeMiscIdUnique 290
    fromThenToEIdKey  = mkPreludeMiscIdUnique 291
    listEIdKey        = mkPreludeMiscIdUnique 292
    sigEIdKey         = mkPreludeMiscIdUnique 293
    recConEIdKey      = mkPreludeMiscIdUnique 294
    recUpdEIdKey      = mkPreludeMiscIdUnique 295
    staticEIdKey      = mkPreludeMiscIdUnique 296

    -- type FieldExp = ...
    fieldExpIdKey :: Unique
    fieldExpIdKey       = mkPreludeMiscIdUnique 310

    -- data Body = ...
    guardedBIdKey, normalBIdKey :: Unique
    guardedBIdKey     = mkPreludeMiscIdUnique 311
    normalBIdKey      = mkPreludeMiscIdUnique 312

    -- data Guard = ...
    normalGEIdKey, patGEIdKey :: Unique
    normalGEIdKey     = mkPreludeMiscIdUnique 313
    patGEIdKey        = mkPreludeMiscIdUnique 314

    -- data Stmt = ...
    bindSIdKey, letSIdKey, noBindSIdKey, parSIdKey :: Unique
    bindSIdKey       = mkPreludeMiscIdUnique 320
    letSIdKey        = mkPreludeMiscIdUnique 321
    noBindSIdKey     = mkPreludeMiscIdUnique 322
    parSIdKey        = mkPreludeMiscIdUnique 323

    -- data Dec = ...
    funDIdKey, valDIdKey, dataDIdKey, newtypeDIdKey, tySynDIdKey,
        classDIdKey, instanceDIdKey, sigDIdKey, forImpDIdKey, pragInlDIdKey,
        pragSpecDIdKey, pragSpecInlDIdKey, pragSpecInstDIdKey, pragRuleDIdKey,
        pragAnnDIdKey, familyNoKindDIdKey, familyKindDIdKey, defaultSigDIdKey,
        dataInstDIdKey, newtypeInstDIdKey, tySynInstDIdKey, standaloneDerivDIdKey,
        closedTypeFamilyKindDIdKey, closedTypeFamilyNoKindDIdKey,
        infixLDIdKey, infixRDIdKey, infixNDIdKey, roleAnnotDIdKey :: Unique
    funDIdKey                    = mkPreludeMiscIdUnique 330
    valDIdKey                    = mkPreludeMiscIdUnique 331
    dataDIdKey                   = mkPreludeMiscIdUnique 332
    newtypeDIdKey                = mkPreludeMiscIdUnique 333
    tySynDIdKey                  = mkPreludeMiscIdUnique 334
    classDIdKey                  = mkPreludeMiscIdUnique 335
    instanceDIdKey               = mkPreludeMiscIdUnique 336
    sigDIdKey                    = mkPreludeMiscIdUnique 337
    forImpDIdKey                 = mkPreludeMiscIdUnique 338
    pragInlDIdKey                = mkPreludeMiscIdUnique 339
    pragSpecDIdKey               = mkPreludeMiscIdUnique 340
    pragSpecInlDIdKey            = mkPreludeMiscIdUnique 341
    pragSpecInstDIdKey           = mkPreludeMiscIdUnique 342
    pragRuleDIdKey               = mkPreludeMiscIdUnique 343
    pragAnnDIdKey                = mkPreludeMiscIdUnique 344
    familyNoKindDIdKey           = mkPreludeMiscIdUnique 345
    familyKindDIdKey             = mkPreludeMiscIdUnique 346
    dataInstDIdKey               = mkPreludeMiscIdUnique 347
    newtypeInstDIdKey            = mkPreludeMiscIdUnique 348
    tySynInstDIdKey              = mkPreludeMiscIdUnique 349
    closedTypeFamilyKindDIdKey   = mkPreludeMiscIdUnique 350
    closedTypeFamilyNoKindDIdKey = mkPreludeMiscIdUnique 351
    infixLDIdKey                 = mkPreludeMiscIdUnique 352
    infixRDIdKey                 = mkPreludeMiscIdUnique 353
    infixNDIdKey                 = mkPreludeMiscIdUnique 354
    roleAnnotDIdKey              = mkPreludeMiscIdUnique 355
    standaloneDerivDIdKey        = mkPreludeMiscIdUnique 356
    defaultSigDIdKey             = mkPreludeMiscIdUnique 357

    -- type Cxt = ...
    cxtIdKey :: Unique
    cxtIdKey            = mkPreludeMiscIdUnique 360

    -- data Strict = ...
    isStrictKey, notStrictKey, unpackedKey :: Unique
    isStrictKey         = mkPreludeMiscIdUnique 363
    notStrictKey        = mkPreludeMiscIdUnique 364
    unpackedKey         = mkPreludeMiscIdUnique 365

    -- data Con = ...
    normalCIdKey, recCIdKey, infixCIdKey, forallCIdKey :: Unique
    normalCIdKey      = mkPreludeMiscIdUnique 370
    recCIdKey         = mkPreludeMiscIdUnique 371
    infixCIdKey       = mkPreludeMiscIdUnique 372
    forallCIdKey      = mkPreludeMiscIdUnique 373

    -- type StrictType = ...
    strictTKey :: Unique
    strictTKey        = mkPreludeMiscIdUnique 374

    -- type VarStrictType = ...
    varStrictTKey :: Unique
    varStrictTKey     = mkPreludeMiscIdUnique 375

    -- data Type = ...
    forallTIdKey, varTIdKey, conTIdKey, tupleTIdKey, unboxedTupleTIdKey, arrowTIdKey,
        listTIdKey, appTIdKey, sigTIdKey, equalityTIdKey, litTIdKey,
        promotedTIdKey, promotedTupleTIdKey,
        promotedNilTIdKey, promotedConsTIdKey :: Unique
    forallTIdKey        = mkPreludeMiscIdUnique 380
    varTIdKey           = mkPreludeMiscIdUnique 381
    conTIdKey           = mkPreludeMiscIdUnique 382
    tupleTIdKey         = mkPreludeMiscIdUnique 383
    unboxedTupleTIdKey  = mkPreludeMiscIdUnique 384
    arrowTIdKey         = mkPreludeMiscIdUnique 385
    listTIdKey          = mkPreludeMiscIdUnique 386
    appTIdKey           = mkPreludeMiscIdUnique 387
    sigTIdKey           = mkPreludeMiscIdUnique 388
    equalityTIdKey      = mkPreludeMiscIdUnique 389
    litTIdKey           = mkPreludeMiscIdUnique 390
    promotedTIdKey      = mkPreludeMiscIdUnique 391
    promotedTupleTIdKey = mkPreludeMiscIdUnique 392
    promotedNilTIdKey   = mkPreludeMiscIdUnique 393
    promotedConsTIdKey  = mkPreludeMiscIdUnique 394

    -- data TyLit = ...
    numTyLitIdKey, strTyLitIdKey :: Unique
    numTyLitIdKey = mkPreludeMiscIdUnique 395
    strTyLitIdKey = mkPreludeMiscIdUnique 396

    -- data TyVarBndr = ...
    plainTVIdKey, kindedTVIdKey :: Unique
    plainTVIdKey       = mkPreludeMiscIdUnique 397
    kindedTVIdKey      = mkPreludeMiscIdUnique 398

    -- data Role = ...
    nominalRIdKey, representationalRIdKey, phantomRIdKey, inferRIdKey :: Unique
    nominalRIdKey          = mkPreludeMiscIdUnique 400
    representationalRIdKey = mkPreludeMiscIdUnique 401
    phantomRIdKey          = mkPreludeMiscIdUnique 402
    inferRIdKey            = mkPreludeMiscIdUnique 403

    -- data Kind = ...
    varKIdKey, conKIdKey, tupleKIdKey, arrowKIdKey, listKIdKey, appKIdKey,
      starKIdKey, constraintKIdKey :: Unique
    varKIdKey         = mkPreludeMiscIdUnique 404
    conKIdKey         = mkPreludeMiscIdUnique 405
    tupleKIdKey       = mkPreludeMiscIdUnique 406
    arrowKIdKey       = mkPreludeMiscIdUnique 407
    listKIdKey        = mkPreludeMiscIdUnique 408
    appKIdKey         = mkPreludeMiscIdUnique 409
    starKIdKey        = mkPreludeMiscIdUnique 410
    constraintKIdKey  = mkPreludeMiscIdUnique 411

    -- data Callconv = ...
    cCallIdKey, stdCallIdKey, cApiCallIdKey, primCallIdKey,
      javaScriptCallIdKey :: Unique
    cCallIdKey          = mkPreludeMiscIdUnique 420
    stdCallIdKey        = mkPreludeMiscIdUnique 421
    cApiCallIdKey       = mkPreludeMiscIdUnique 422
    primCallIdKey       = mkPreludeMiscIdUnique 423
    javaScriptCallIdKey = mkPreludeMiscIdUnique 424

    -- data Safety = ...
    unsafeIdKey, safeIdKey, interruptibleIdKey :: Unique
    unsafeIdKey        = mkPreludeMiscIdUnique 430
    safeIdKey          = mkPreludeMiscIdUnique 431
    interruptibleIdKey = mkPreludeMiscIdUnique 432

    -- data Inline = ...
    noInlineDataConKey, inlineDataConKey, inlinableDataConKey :: Unique
    noInlineDataConKey  = mkPreludeDataConUnique 40
    inlineDataConKey    = mkPreludeDataConUnique 41
    inlinableDataConKey = mkPreludeDataConUnique 42

    -- data RuleMatch = ...
    conLikeDataConKey, funLikeDataConKey :: Unique
    conLikeDataConKey = mkPreludeDataConUnique 43
    funLikeDataConKey = mkPreludeDataConUnique 44

    -- data Phases = ...
    allPhasesDataConKey, fromPhaseDataConKey, beforePhaseDataConKey :: Unique
    allPhasesDataConKey   = mkPreludeDataConUnique 45
    fromPhaseDataConKey   = mkPreludeDataConUnique 46
    beforePhaseDataConKey = mkPreludeDataConUnique 47

    -- newtype TExp a = ...
    tExpDataConKey :: Unique
    tExpDataConKey = mkPreludeDataConUnique 48

    -- data FunDep = ...
    funDepIdKey :: Unique
    funDepIdKey = mkPreludeMiscIdUnique 440

    -- data FamFlavour = ...
    typeFamIdKey, dataFamIdKey :: Unique
    typeFamIdKey = mkPreludeMiscIdUnique 450
    dataFamIdKey = mkPreludeMiscIdUnique 451

    -- data TySynEqn = ...
    tySynEqnIdKey :: Unique
    tySynEqnIdKey = mkPreludeMiscIdUnique 460

    -- quasiquoting
    quoteExpKey, quotePatKey, quoteDecKey, quoteTypeKey :: Unique
    quoteExpKey  = mkPreludeMiscIdUnique 470
    quotePatKey  = mkPreludeMiscIdUnique 471
    quoteDecKey  = mkPreludeMiscIdUnique 472
    quoteTypeKey = mkPreludeMiscIdUnique 473

    -- data RuleBndr = ...
    ruleVarIdKey, typedRuleVarIdKey :: Unique
    ruleVarIdKey      = mkPreludeMiscIdUnique 480
    typedRuleVarIdKey = mkPreludeMiscIdUnique 481

    -- data AnnTarget = ...
    valueAnnotationIdKey, typeAnnotationIdKey, moduleAnnotationIdKey :: Unique
    valueAnnotationIdKey  = mkPreludeMiscIdUnique 490
    typeAnnotationIdKey   = mkPreludeMiscIdUnique 491
    moduleAnnotationIdKey = mkPreludeMiscIdUnique 492