{-# LANGUAGE CPP               #-}
{-# LANGUAGE ConstraintKinds   #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE PatternSynonyms   #-}
{-# LANGUAGE ViewPatterns   #-}

-- | Compat Core module that handles the GHC module hierarchy re-organization
-- by re-exporting everything we care about.
--
-- This module provides no other compat mechanisms, except for simple
-- backward-compatible pattern synonyms.
module Development.IDE.GHC.Compat.Core (
    -- * Session
    DynFlags,
    extensions,
    extensionFlags,
    targetPlatform,
    packageFlags,
    generalFlags,
    warningFlags,
    topDir,
    hiDir,
    tmpDir,
    importPaths,
    useColor,
    canUseColor,
    useUnicode,
    objectDir,
    flagsForCompletion,
    setImportPaths,
    outputFile,
    pluginModNames,
    refLevelHoleFits,
    maxRefHoleFits,
    maxValidHoleFits,
    setOutputFile,
    lookupType,
    needWiredInHomeIface,
    loadWiredInHomeIface,
    readIface,
    loadSysInterface,
    importDecl,
    CommandLineOption,
    sPgm_F,
    settings,
    gopt,
    gopt_set,
    gopt_unset,
    wopt,
    wopt_set,
    xFlags,
    xopt,
    xopt_unset,
    xopt_set,
    FlagSpec(..),
    WarningFlag(..),
    GeneralFlag(..),
    PackageFlag,
    PackageArg(..),
    ModRenaming(..),
    pattern ExposePackage,
    parseDynamicFlagsCmdLine,
    parseDynamicFilePragma,
#if !MIN_VERSION_ghc(9,3,0)
    WarnReason(..),
#endif
    wWarningFlags,
    updOptLevel,
    -- slightly unsafe
    setUnsafeGlobalDynFlags,
    -- * Linear Haskell
    scaledThing,
    -- * Interface Files
    IfaceExport,
    IfaceTyCon(..),
    ModIface,
    ModIface_(..),
    HscSource(..),
    WhereFrom(..),
    loadInterface,
#if !MIN_VERSION_ghc(9,3,0)
    SourceModified(..),
#endif
    loadModuleInterface,
    RecompileRequired(..),
    mkPartialIface,
    mkFullIface,
    checkOldIface,
    IsBootInterface(..),
    -- * Fixity
    LexicalFixity(..),
    Fixity (..),
    mi_fix,
    defaultFixity,
    lookupFixityRn,
    -- * ModSummary
    ModSummary(..),
    -- * HomeModInfo
    HomeModInfo(..),
    -- * ModGuts
    ModGuts(..),
    CgGuts(..),
    -- * ModDetails
    ModDetails(..),
    -- * HsExpr,
    -- * Var
    Type (
      TyCoRep.TyVarTy,
      TyCoRep.AppTy,
      TyCoRep.TyConApp,
      TyCoRep.ForAllTy,
      -- Omitted on purpose
      -- pattern Synonym right below it
      -- TyCoRep.FunTy,
      TyCoRep.LitTy,
      TyCoRep.CastTy,
      TyCoRep.CoercionTy
      ),
    pattern FunTy,
    pattern ConPatIn,
    conPatDetails,
    mapConPatDetail,
    mkVisFunTys,
    -- * Specs
    ImpDeclSpec(..),
    ImportSpec(..),
    -- * SourceText
    SourceText(..),
    -- * Name
    tyThingParent_maybe,
    -- * Ways
    Way,
    wayGeneralFlags,
    wayUnsetGeneralFlags,
    -- * AvailInfo
    Avail.AvailInfo,
    pattern AvailName,
    pattern AvailFL,
    pattern AvailTC,
    Avail.availName,
    Avail.availNames,
#if !MIN_VERSION_ghc(9,7,0)
    Avail.availNamesWithSelectors,
#endif
    Avail.availsToNameSet,
    -- * TcGblEnv
    TcGblEnv(..),
    -- * Parsing and LExer types
    HsModule(..),
    GHC.ParsedSource,
    GHC.RenamedSource,
    -- * Compilation Main
    HscEnv,
    GHC.runGhc,
    unGhc,
    Session(..),
    modifySession,
    getSession,
    GHC.setSessionDynFlags,
    getSessionDynFlags,
    GhcMonad,
    Ghc,
    runHsc,
    compileFile,
    Phase(..),
    hscDesugar,
    hscGenHardCode,
    hscInteractive,
    hscSimplify,
    hscTypecheckRename,
    Development.IDE.GHC.Compat.Core.makeSimpleDetails,
    -- * Typecheck utils
    tcSplitForAllTyVars,
    tcSplitForAllTyVarBinder_maybe,
    typecheckIface,
    Development.IDE.GHC.Compat.Core.mkIfaceTc,
    Development.IDE.GHC.Compat.Core.mkBootModDetailsTc,
    Development.IDE.GHC.Compat.Core.initTidyOpts,
    hscUpdateHPT,
    driverNoStop,
    tidyProgram,
    ImportedModsVal(..),
    importedByUser,
    GHC.TypecheckedSource,
    -- * Source Locations
    HasSrcSpan,
    SrcLoc.Located,
    SrcLoc.unLoc,
    getLoc,
    GHC.getLocA,
    GHC.locA,
    GHC.noLocA,
    unLocA,
    LocatedAn,
    GHC.LocatedA,
    GHC.AnnListItem(..),
    GHC.NameAnn(..),
    SrcLoc.RealLocated,
    SrcLoc.GenLocated(..),
    SrcLoc.SrcSpan(SrcLoc.UnhelpfulSpan),
    SrcLoc.RealSrcSpan,
    pattern RealSrcSpan,
    SrcLoc.RealSrcLoc,
    pattern RealSrcLoc,
    SrcLoc.SrcLoc(SrcLoc.UnhelpfulLoc),
    BufSpan,
    SrcSpanAnn',
    GHC.SrcAnn,
    SrcLoc.leftmost_smallest,
    SrcLoc.containsSpan,
    SrcLoc.mkGeneralSrcSpan,
    SrcLoc.mkRealSrcSpan,
    SrcLoc.mkRealSrcLoc,
    SrcLoc.getRealSrcSpan,
    SrcLoc.realSrcLocSpan,
    SrcLoc.realSrcSpanStart,
    SrcLoc.realSrcSpanEnd,
    isSubspanOfA,
    SrcLoc.isSubspanOf,
    SrcLoc.wiredInSrcSpan,
    SrcLoc.mkSrcSpan,
    SrcLoc.srcSpanStart,
    SrcLoc.srcSpanStartLine,
    SrcLoc.srcSpanStartCol,
    SrcLoc.srcSpanEnd,
    SrcLoc.srcSpanEndLine,
    SrcLoc.srcSpanEndCol,
    SrcLoc.srcSpanFile,
    SrcLoc.srcLocCol,
    SrcLoc.srcLocFile,
    SrcLoc.srcLocLine,
    SrcLoc.noSrcSpan,
    SrcLoc.noSrcLoc,
    SrcLoc.noLoc,
    mapLoc,
    -- * Finder
    FindResult(..),
    mkHomeModLocation,
    addBootSuffixLocnOut,
    findObjectLinkableMaybe,
    InstalledFindResult(..),
    -- * Module and Package
    ModuleOrigin(..),
    PackageName(..),
    -- * Linker
    Unlinked(..),
    Linkable(..),
    unload,
    -- * Hooks
    Hooks,
    runMetaHook,
    MetaHook,
    MetaRequest(..),
    metaRequestE,
    metaRequestP,
    metaRequestT,
    metaRequestD,
    metaRequestAW,
    -- * HPT
    addToHpt,
    addListToHpt,
    -- * Driver-Make
    Target(..),
    TargetId(..),
    mkSimpleTarget,
    mkModuleGraph,
    -- * GHCi
    initObjLinker,
    loadDLL,
    InteractiveImport(..),
    GHC.getContext,
    GHC.setContext,
    GHC.parseImportDecl,
    GHC.runDecls,
    Warn(..),
    -- * ModLocation
    GHC.ModLocation,
    Module.ml_hs_file,
    Module.ml_obj_file,
    Module.ml_hi_file,
    Module.ml_hie_file,
    -- * DataCon
    DataCon.dataConExTyCoVars,
    -- * Role
    Role(..),
    -- * Panic
    Plain.PlainGhcException,
    panic,
    panicDoc,
    -- * Other
    GHC.CoreModule(..),
    GHC.SafeHaskellMode(..),
    pattern GRE,
    gre_name,
    gre_imp,
    gre_lcl,
    gre_par,
    collectHsBindsBinders,
    -- * Util Module re-exports
    module GHC.Builtin.Names,
    module GHC.Builtin.Types,
    module GHC.Builtin.Types.Prim,
    module GHC.Builtin.Utils,
    module GHC.Core.Class,
    module GHC.Core.Coercion,
    module GHC.Core.ConLike,
    module GHC.Core.DataCon,
    module GHC.Core.FamInstEnv,
    module GHC.Core.InstEnv,
    module GHC.Types.Unique.FM,
    module GHC.Core.PatSyn,
    module GHC.Core.Predicate,
    module GHC.Core.TyCon,
    module GHC.Core.TyCo.Ppr,
    module GHC.Core.Type,
    module GHC.Core.Unify,
    module GHC.Core.Utils,

    module GHC.HsToCore.Docs,
    module GHC.HsToCore.Expr,
    module GHC.HsToCore.Monad,

    module GHC.Iface.Syntax,

    module GHC.Hs.Decls,
    module GHC.Hs.Expr,
    module GHC.Hs.Doc,
    module GHC.Hs.Extension,
    module GHC.Hs.ImpExp,
    module GHC.Hs.Pat,
    module GHC.Hs.Type,
    module GHC.Hs.Utils,
    module Language.Haskell.Syntax,

    module GHC.Rename.Names,
    module GHC.Rename.Splice,

    module GHC.Tc.Instance.Family,
    module GHC.Tc.Module,
    module GHC.Tc.Types,
    module GHC.Tc.Types.Evidence,
    module GHC.Tc.Utils.Env,
    module GHC.Tc.Utils.Monad,

    module GHC.Types.Basic,
    module GHC.Types.Id,
    module GHC.Types.Name            ,
    module GHC.Types.Name.Set,

    module GHC.Types.Name.Cache,
    module GHC.Types.Name.Env,
    module GHC.Types.Name.Reader,
    module GHC.Utils.Error,
#if !MIN_VERSION_ghc(9,7,0)
    module GHC.Types.Avail,
#endif
    module GHC.Types.SourceFile,
    module GHC.Types.SourceText,
    module GHC.Types.TyThing,
    module GHC.Types.TyThing.Ppr,
    module GHC.Types.Unique.Supply,
    module GHC.Types.Var,
    module GHC.Unit.Module,
    -- * Syntax re-exports
    module GHC.Hs,
    module GHC.Hs.Binds,
    module GHC.Parser,
    module GHC.Parser.Header,
    module GHC.Parser.Lexer,
#if MIN_VERSION_ghc(9,3,0)
    CompileReason(..),
    hsc_type_env_vars,
    hscUpdateHUG, hscUpdateHPT, hsc_HUG,
    GhcMessage(..),
    getKey,
    module GHC.Driver.Env.KnotVars,
    module GHC.Iface.Recomp,
    module GHC.Linker.Types,
    module GHC.Unit.Module.Graph,
    module GHC.Types.Unique.Map,
    module GHC.Utils.TmpFs,
    module GHC.Utils.Panic,
    module GHC.Unit.Finder.Types,
    module GHC.Unit.Env,
    module GHC.Driver.Phases,
#endif
# if !MIN_VERSION_ghc(9,4,0)
    pattern HsFieldBind,
    hfbAnn,
    hfbLHS,
    hfbRHS,
    hfbPun,
#endif
#if !MIN_VERSION_ghc_boot_th(9,4,1)
    Extension(.., NamedFieldPuns),
#else
    Extension(..),
#endif
    UniqFM,
    mkCgInteractiveGuts,
    justBytecode,
    justObjects,
    emptyHomeModInfoLinkable,
    homeModInfoByteCode,
    homeModInfoObject,
# if !MIN_VERSION_ghc(9,5,0)
    field_label,
#endif
    groupOrigin,
    isVisibleFunArg,
    ) where

import qualified GHC

-- NOTE(ozkutuk): Cpp clashes Phase.Cpp, so we hide it.
-- Not the greatest solution, but gets the job done
-- (until the CPP extension is actually needed).
import GHC.LanguageExtensions.Type hiding (Cpp)

import           GHC.Hs.Binds

-- See Note [Guidelines For Using CPP In GHCIDE Import Statements]

import           GHC.Builtin.Names            hiding (Unique, printName)
import           GHC.Builtin.Types
import           GHC.Builtin.Types.Prim
import           GHC.Builtin.Utils
import           GHC.Core.Class
import           GHC.Core.Coercion
import           GHC.Core.ConLike
import           GHC.Core.DataCon             hiding (dataConExTyCoVars)
import qualified GHC.Core.DataCon             as DataCon
import           GHC.Core.FamInstEnv          hiding (pprFamInst)
import           GHC.Core.InstEnv
import           GHC.Types.Unique.FM
import           GHC.Core.PatSyn
import           GHC.Core.Predicate
import           GHC.Core.TyCo.Ppr
import qualified GHC.Core.TyCo.Rep            as TyCoRep
import           GHC.Core.TyCon
import           GHC.Core.Type
import           GHC.Core.Unify
import           GHC.Core.Utils
import           GHC.Driver.CmdLine           (Warn (..))
import           GHC.Driver.Hooks
import           GHC.Driver.Main              as GHC
import           GHC.Driver.Monad
import           GHC.Driver.Phases
import           GHC.Driver.Pipeline
import           GHC.Driver.Plugins
import           GHC.Driver.Session           hiding (ExposePackage)
import qualified GHC.Driver.Session           as DynFlags
import           GHC.HsToCore.Docs
import           GHC.HsToCore.Expr
import           GHC.HsToCore.Monad
import           GHC.Iface.Load
import           GHC.Iface.Make               as GHC
import           GHC.Iface.Recomp
import           GHC.Iface.Syntax
import           GHC.Iface.Tidy               as GHC
import           GHC.IfaceToCore
import           GHC.Parser
import           GHC.Parser.Header            hiding (getImports)
import           GHC.Rename.Fixity            (lookupFixityRn)
import           GHC.Rename.Names
import           GHC.Rename.Splice
import qualified GHC.Runtime.Interpreter      as GHCi
import           GHC.Tc.Instance.Family
import           GHC.Tc.Module
import           GHC.Tc.Types
import           GHC.Tc.Types.Evidence        hiding ((<.>))
import           GHC.Tc.Utils.Env
import           GHC.Tc.Utils.Monad           hiding (Applicative (..), IORef,
                                               MonadFix (..), MonadIO (..),
                                               allM, anyM, concatMapM,
                                               mapMaybeM, (<$>))
import           GHC.Tc.Utils.TcType          as TcType
import qualified GHC.Types.Avail              as Avail
import           GHC.Types.Basic
import           GHC.Types.Id
import           GHC.Types.Name               hiding (varName)
import           GHC.Types.Name.Cache
import           GHC.Types.Name.Env
import           GHC.Types.Name.Reader        hiding (GRE, gre_name, gre_imp, gre_lcl, gre_par)
import qualified GHC.Types.Name.Reader        as RdrName
import           GHC.Types.SrcLoc             (BufPos, BufSpan,
                                               SrcLoc (UnhelpfulLoc),
                                               SrcSpan (UnhelpfulSpan))
import qualified GHC.Types.SrcLoc             as SrcLoc
import           GHC.Types.Unique.Supply
import           GHC.Types.Var                (Var (varName), setTyVarUnique,
                                               setVarUnique)

import qualified GHC.Types.Var                as TypesVar
import           GHC.Unit.Info                (PackageName (..))
import           GHC.Unit.Module              hiding (ModLocation (..), UnitId,
                                               moduleUnit,
                                               toUnitId)
import qualified GHC.Unit.Module              as Module
import           GHC.Unit.State               (ModuleOrigin (..))
import           GHC.Utils.Error              (Severity (..), emptyMessages)
import           GHC.Utils.Panic              hiding (try)
import qualified GHC.Utils.Panic.Plain        as Plain


import           Data.Foldable (toList)
import           GHC.Data.Bag
import           GHC.Core.Multiplicity        (scaledThing)
import           GHC.Driver.Env
import           GHC.Hs                       (HsModule (..), SrcSpanAnn')
import           GHC.Hs.Decls                 hiding (FunDep)
import           GHC.Hs.Doc
import           GHC.Hs.Expr
import           GHC.Hs.Extension
import           GHC.Hs.ImpExp
import           GHC.Hs.Pat
import           GHC.Hs.Type
import           GHC.Hs.Utils                 hiding (collectHsBindsBinders)
import qualified GHC.Linker.Loader            as Linker
import           GHC.Linker.Types
import           GHC.Parser.Lexer             hiding (initParserState, getPsMessages)
import           GHC.Parser.Annotation        (EpAnn (..))
import           GHC.Platform.Ways
import           GHC.Runtime.Context          (InteractiveImport (..))
#if !MIN_VERSION_ghc(9,7,0)
import           GHC.Types.Avail              (greNamePrintableName)
#endif
import           GHC.Types.Fixity             (LexicalFixity (..), Fixity (..), defaultFixity)
import           GHC.Types.Meta
import           GHC.Types.Name.Set
import           GHC.Types.SourceFile         (HscSource (..))
import           GHC.Types.SourceText
import           GHC.Types.Target             (Target (..), TargetId (..))
import           GHC.Types.TyThing
import           GHC.Types.TyThing.Ppr
import           GHC.Unit.Finder              hiding (mkHomeModLocation)
import           GHC.Unit.Home.ModInfo
import           GHC.Unit.Module.Imported
import           GHC.Unit.Module.ModDetails
import           GHC.Unit.Module.ModGuts
import           GHC.Unit.Module.ModIface     (IfaceExport, ModIface (..),
                                               ModIface_ (..), mi_fix)
import           GHC.Unit.Module.ModSummary   (ModSummary (..))
import           Language.Haskell.Syntax hiding (FunDep)

#if !MIN_VERSION_ghc(9,3,0)
import           GHC.Types.SourceFile         (SourceModified(..))
import           GHC.Unit.Module.Graph        (mkModuleGraph)
import qualified GHC.Unit.Finder as GHC
#endif

#if MIN_VERSION_ghc(9,3,0)
import GHC.Driver.Env.KnotVars
import GHC.Unit.Module.Graph
import GHC.Driver.Errors.Types
import GHC.Types.Unique.Map
import GHC.Types.Unique
import GHC.Utils.TmpFs
import GHC.Utils.Panic
import GHC.Unit.Finder.Types
import GHC.Unit.Env
import qualified GHC.Driver.Config.Tidy       as GHC
import qualified GHC.Data.Strict              as Strict
import GHC.Driver.Env as GHCi
import qualified GHC.Unit.Finder as GHC
import qualified GHC.Driver.Config.Finder as GHC
#endif

mkHomeModLocation :: DynFlags -> ModuleName -> FilePath -> IO Module.ModLocation
#if MIN_VERSION_ghc(9,3,0)
mkHomeModLocation df mn f = pure $ GHC.mkHomeModLocation (GHC.initFinderOpts df) mn f
#else
mkHomeModLocation = GHC.mkHomeModLocation
#endif

#if MIN_VERSION_ghc(9,3,0)
pattern RealSrcSpan :: SrcLoc.RealSrcSpan -> Maybe BufSpan -> SrcLoc.SrcSpan
#else
pattern RealSrcSpan :: SrcLoc.RealSrcSpan -> Maybe BufSpan -> SrcLoc.SrcSpan
#endif

#if MIN_VERSION_ghc(9,3,0)
pattern RealSrcSpan x y <- SrcLoc.RealSrcSpan x ((\case Strict.Nothing -> Nothing; Strict.Just a -> Just a) -> y) where
  RealSrcSpan x y = SrcLoc.RealSrcSpan x (case y of Nothing -> Strict.Nothing; Just a -> Strict.Just a)

#else
pattern RealSrcSpan x y = SrcLoc.RealSrcSpan x y
#endif
{-# COMPLETE RealSrcSpan, UnhelpfulSpan #-}

#if MIN_VERSION_ghc(9,3,0)
pattern RealSrcLoc :: SrcLoc.RealSrcLoc -> Strict.Maybe BufPos-> SrcLoc.SrcLoc
#else
pattern RealSrcLoc :: SrcLoc.RealSrcLoc -> Maybe BufPos-> SrcLoc.SrcLoc
#endif
pattern RealSrcLoc x y = SrcLoc.RealSrcLoc x y
{-# COMPLETE RealSrcLoc, UnhelpfulLoc #-}


pattern AvailTC :: Name -> [Name] -> [FieldLabel] -> Avail.AvailInfo
#if __GLASGOW_HASKELL__ >= 907
pattern AvailTC n names pieces <- Avail.AvailTC n ((,[]) -> (names,pieces))
#else
pattern AvailTC n names pieces <- Avail.AvailTC n ((\gres -> foldr (\gre (names, pieces) -> case gre of
      Avail.NormalGreName name -> (name: names, pieces)
      Avail.FieldGreName label -> (names, label:pieces)) ([], []) gres) -> (names, pieces))
#endif

pattern AvailName :: Name -> Avail.AvailInfo
#if __GLASGOW_HASKELL__ >= 907
pattern AvailName n <- Avail.Avail n
#else
pattern AvailName n <- Avail.Avail (Avail.NormalGreName n)
#endif

pattern AvailFL :: FieldLabel -> Avail.AvailInfo
#if __GLASGOW_HASKELL__ >= 907
pattern AvailFL fl <- (const Nothing -> Just fl) -- this pattern always fails as this field was removed in 9.7
#else
pattern AvailFL fl <- Avail.Avail (Avail.FieldGreName fl)
#endif

{-# COMPLETE AvailTC, AvailName, AvailFL #-}

setImportPaths :: [FilePath] -> DynFlags -> DynFlags
setImportPaths importPaths flags = flags { importPaths = importPaths }

pattern ExposePackage :: String -> PackageArg -> ModRenaming -> PackageFlag
-- https://github.com/facebook/fbghc
#ifdef __FACEBOOK_HASKELL__
pattern ExposePackage s a mr <- DynFlags.ExposePackage s a _ mr
#else
pattern ExposePackage s a mr = DynFlags.ExposePackage s a mr
#endif

#if __GLASGOW_HASKELL__ >= 906
isVisibleFunArg = TypesVar.isVisibleFunArg
type FunTyFlag = TypesVar.FunTyFlag
#else
isVisibleFunArg VisArg = True
isVisibleFunArg _ = False
type FunTyFlag = TypesVar.AnonArgFlag
#endif
pattern FunTy :: Development.IDE.GHC.Compat.Core.FunTyFlag -> Type -> Type -> Type
pattern FunTy af arg res <- TyCoRep.FunTy {ft_af = af, ft_arg = arg, ft_res = res}


-- type HasSrcSpan x a = (GenLocated SrcSpan a ~ x)
-- type HasSrcSpan x = () :: Constraint

class HasSrcSpan a where
  getLoc :: a -> SrcSpan

instance HasSrcSpan SrcSpan where
  getLoc = id

instance HasSrcSpan (SrcLoc.GenLocated SrcSpan a) where
  getLoc = GHC.getLoc

instance HasSrcSpan (SrcSpanAnn' ann) where
  getLoc = GHC.locA
instance HasSrcSpan (SrcLoc.GenLocated (SrcSpanAnn' ann) a) where
  getLoc (L l _) = l

pattern L :: HasSrcSpan a => SrcSpan -> e -> SrcLoc.GenLocated a e
pattern L l a <- GHC.L (getLoc -> l) a
{-# COMPLETE L #-}

-- This is from the old api, but it still simplifies
pattern ConPatIn :: SrcLoc.Located (ConLikeP GhcPs) -> HsConPatDetails GhcPs -> Pat GhcPs
pattern ConPatIn con args <- ConPat EpAnnNotUsed (L _ (SrcLoc.noLoc -> con)) args
  where
    ConPatIn con args = ConPat EpAnnNotUsed (GHC.noLocA $ SrcLoc.unLoc con) args

conPatDetails :: Pat p -> Maybe (HsConPatDetails p)
conPatDetails (ConPat _ _ args) = Just args
conPatDetails _ = Nothing

mapConPatDetail :: (HsConPatDetails p -> Maybe (HsConPatDetails p)) -> Pat p -> Maybe (Pat p)
mapConPatDetail f pat@(ConPat _ _ args) = (\args' -> pat { pat_args = args'}) <$> f args
mapConPatDetail _ _ = Nothing


initObjLinker :: HscEnv -> IO ()
initObjLinker env =
    GHCi.initObjLinker (GHCi.hscInterp env)

loadDLL :: HscEnv -> String -> IO (Maybe String)
loadDLL env =
    GHCi.loadDLL (GHCi.hscInterp env)

unload :: HscEnv -> [Linkable] -> IO ()
unload hsc_env linkables =
  Linker.unload
    (GHCi.hscInterp hsc_env)
    hsc_env linkables

#if !MIN_VERSION_ghc(9,3,0)
setOutputFile :: FilePath -> DynFlags -> DynFlags
setOutputFile f d = d {
  outputFile_    = Just f
  }
#endif

isSubspanOfA :: LocatedAn la a -> LocatedAn lb b -> Bool
isSubspanOfA a b = SrcLoc.isSubspanOf (GHC.getLocA a) (GHC.getLocA b)

type LocatedAn a = GHC.LocatedAn a

unLocA :: forall pass a. XRec (GhcPass pass) a -> a
unLocA = unXRec @(GhcPass pass)


pattern GRE :: Name -> Parent -> Bool -> [ImportSpec] -> RdrName.GlobalRdrElt
{-# COMPLETE GRE #-}
pattern GRE{gre_name, gre_par, gre_lcl, gre_imp} <- RdrName.GRE
#if MIN_VERSION_ghc(9,7,0)
    {gre_name = gre_name
#else
    {gre_name = (greNamePrintableName -> gre_name)
#endif
    ,gre_par, gre_lcl, gre_imp = (toList -> gre_imp)}

collectHsBindsBinders :: CollectPass p => Bag (XRec p (HsBindLR p idR)) -> [IdP p]
collectHsBindsBinders x = GHC.collectHsBindsBinders CollNoDictBinders x



makeSimpleDetails :: HscEnv -> TcGblEnv -> IO ModDetails
makeSimpleDetails hsc_env =
  GHC.makeSimpleDetails
#if MIN_VERSION_ghc(9,3,0)
              (hsc_logger hsc_env)
#else
              hsc_env
#endif

mkIfaceTc hsc_env sf details _ms tcGblEnv = -- ms is only used in GHC >= 9.4
  GHC.mkIfaceTc hsc_env sf details
#if MIN_VERSION_ghc(9,3,0)
              _ms
#endif
              tcGblEnv

mkBootModDetailsTc :: HscEnv -> TcGblEnv -> IO ModDetails
mkBootModDetailsTc session = GHC.mkBootModDetailsTc
#if MIN_VERSION_ghc(9,3,0)
          (hsc_logger session)
#else
          session
#endif

#if !MIN_VERSION_ghc(9,3,0)
type TidyOpts = HscEnv
#endif

initTidyOpts :: HscEnv -> IO TidyOpts
initTidyOpts =
#if MIN_VERSION_ghc(9,3,0)
  GHC.initTidyOpts
#else
  pure
#endif

driverNoStop =
#if MIN_VERSION_ghc(9,3,0)
                                         NoStop
#else
                                         StopLn
#endif

#if !MIN_VERSION_ghc(9,3,0)
hscUpdateHPT :: (HomePackageTable -> HomePackageTable) -> HscEnv -> HscEnv
hscUpdateHPT k session = session { hsc_HPT = k (hsc_HPT session) }
#endif

#if !MIN_VERSION_ghc(9,4,0)
pattern HsFieldBind :: XHsRecField id -> id -> arg -> Bool -> HsRecField' id arg
pattern HsFieldBind {hfbAnn, hfbLHS, hfbRHS, hfbPun} <- HsRecField hfbAnn (SrcLoc.unLoc -> hfbLHS) hfbRHS hfbPun where
  HsFieldBind ann lhs rhs pun = HsRecField ann (SrcLoc.noLoc lhs) rhs pun
#endif

#if !MIN_VERSION_ghc_boot_th(9,4,1)
pattern NamedFieldPuns :: Extension
pattern NamedFieldPuns = RecordPuns
#endif

#if MIN_VERSION_ghc(9,5,0)
mkVisFunTys = mkScaledFunctionTys
mapLoc :: (a -> b) -> SrcLoc.GenLocated l a -> SrcLoc.GenLocated l b
mapLoc = fmap
groupOrigin = mg_ext
#else
mapLoc :: (a -> b) -> SrcLoc.GenLocated l a -> SrcLoc.GenLocated l b
mapLoc = SrcLoc.mapLoc
groupOrigin :: MatchGroup p body -> Origin
groupOrigin = mg_origin
#endif


#if !MIN_VERSION_ghc(9,5,0)
mkCgInteractiveGuts :: CgGuts -> CgGuts
mkCgInteractiveGuts = id

emptyHomeModInfoLinkable :: Maybe Linkable
emptyHomeModInfoLinkable = Nothing

justBytecode :: Linkable -> Maybe Linkable
justBytecode = Just

justObjects :: Linkable -> Maybe Linkable
justObjects = Just

homeModInfoByteCode, homeModInfoObject :: HomeModInfo -> Maybe Linkable
homeModInfoByteCode = hm_linkable
homeModInfoObject = hm_linkable

field_label :: a -> a
field_label = id
#endif

mkSimpleTarget :: DynFlags -> FilePath -> Target
#if MIN_VERSION_ghc(9,3,0)
mkSimpleTarget df fp = Target (TargetFile fp Nothing) True (homeUnitId_ df) Nothing
#else
mkSimpleTarget _ fp = Target (TargetFile fp Nothing) True Nothing
#endif