    {-# LANGUAGE ConstraintKinds #-}
    {-# LANGUAGE ScopedTypeVariables, BangPatterns #-}
    {-# LANGUAGE TypeFamilies #-}

    {-# OPTIONS_GHC -Wno-incomplete-uni-patterns   #-}
    {-# OPTIONS_GHC -Wno-incomplete-record-updates #-}

    {-
    (c) The GRASP/AQUA Project, Glasgow University, 1992-1998

    Renaming and dependency analysis of bindings

    This module does renaming and dependency analysis on value bindings in
    the abstract syntax.  It does {\em not} do cycle-checks on class or
    type-synonym declarations; those cannot be done at this stage because
    they may be affected by renaming (which isn't fully worked out yet).
    -}

    module GHC.Rename.Bind (
       -- Renaming top-level bindings
       rnTopBindsLHS, rnTopBindsBoot, rnValBindsRHS,

       -- Renaming local bindings
       rnLocalBindsAndThen, rnLocalValBindsLHS, rnLocalValBindsRHS,

       -- Other bindings
       rnMethodBinds, renameSigs,
       rnMatchGroup, rnGRHSs, rnGRHS, rnSrcFixityDecl,
       makeMiniFixityEnv, MiniFixityEnv,
       HsSigCtxt(..)
       ) where

    import GHC.Prelude

    import {-# SOURCE #-} GHC.Rename.Expr( rnExpr, rnLExpr, rnStmts )

    import GHC.Hs
    import GHC.Tc.Utils.Monad
    import GHC.Rename.HsType
    import GHC.Rename.Pat
    import GHC.Rename.Names
    import GHC.Rename.Env
    import GHC.Rename.Fixity
    import GHC.Rename.Utils ( HsDocContext(..), mapFvRn
                            , checkDupRdrNames, checkDupRdrNamesN, warnUnusedLocalBinds
                            , checkUnusedRecordWildcard
                            , checkDupAndShadowedNames, bindLocalNamesFV
                            , addNoNestedForallsContextsErr, checkInferredVars )
    import GHC.Driver.Session
    import GHC.Unit.Module
    import GHC.Types.FieldLabel
    import GHC.Types.Name
    import GHC.Types.Name.Env
    import GHC.Types.Name.Set
    import GHC.Types.Name.Reader ( RdrName, rdrNameOcc )
    import GHC.Types.SrcLoc as SrcLoc
    import GHC.Data.List.SetOps    ( findDupsEq )
    import GHC.Types.Basic         ( RecFlag(..), TypeOrKind(..) )
    import GHC.Data.Graph.Directed ( SCC(..) )
    import GHC.Data.Bag
    import GHC.Utils.Misc
    import GHC.Utils.Outputable
    import GHC.Utils.Panic
    import GHC.Types.Unique.Set
    import GHC.Data.Maybe          ( orElse )
    import GHC.Data.OrdList
    import qualified GHC.LanguageExtensions as LangExt

    import Control.Monad
    import Data.Foldable      ( toList )
    import Data.List          ( partition, sortBy )
    import Data.List.NonEmpty ( NonEmpty(..) )

    {-
    -- ToDo: Put the annotations into the monad, so that they arrive in the proper
    -- place and can be used when complaining.

    The code tree received by the function @rnBinds@ contains definitions
    in where-clauses which are all apparently mutually recursive, but which may
    not really depend upon each other. For example, in the top level program
    \begin{verbatim}
    f x = y where a = x
                  y = x
    \end{verbatim}
    the definitions of @a@ and @y@ do not depend on each other at all.
    Unfortunately, the typechecker cannot always check such definitions.
    \footnote{Mycroft, A. 1984. Polymorphic type schemes and recursive
    definitions. In Proceedings of the International Symposium on Programming,
    Toulouse, pp. 217-39. LNCS 167. Springer Verlag.}
    However, the typechecker usually can check definitions in which only the
    strongly connected components have been collected into recursive bindings.
    This is precisely what the function @rnBinds@ does.

    ToDo: deal with case where a single monobinds binds the same variable
    twice.

    The vertag tag is a unique @Int@; the tags only need to be unique
    within one @MonoBinds@, so that unique-Int plumbing is done explicitly
    (heavy monad machinery not needed).

    ************************************************************************
    *                                                                      *
    * naming conventions                                                   *
    *                                                                      *
    ************************************************************************

    \subsection[name-conventions]{Name conventions}

    The basic algorithm involves walking over the tree and returning a tuple
    containing the new tree plus its free variables. Some functions, such
    as those walking polymorphic bindings (HsBinds) and qualifier lists in
    list comprehensions (@Quals@), return the variables bound in local
    environments. These are then used to calculate the free variables of the
    expression evaluated in these environments.

    Conventions for variable names are as follows:
    \begin{itemize}
    \item
    new code is given a prime to distinguish it from the old.

    \item
    a set of variables defined in @Exp@ is written @dvExp@

    \item
    a set of variables free in @Exp@ is written @fvExp@
    \end{itemize}

    ************************************************************************
    *                                                                      *
    * analysing polymorphic bindings (HsBindGroup, HsBind)
    *                                                                      *
    ************************************************************************

    \subsubsection[dep-HsBinds]{Polymorphic bindings}

    Non-recursive expressions are reconstructed without any changes at top
    level, although their component expressions may have to be altered.
    However, non-recursive expressions are currently not expected as
    \Haskell{} programs, and this code should not be executed.

    Monomorphic bindings contain information that is returned in a tuple
    (a @FlatMonoBinds@) containing:

    \begin{enumerate}
    \item
    a unique @Int@ that serves as the ``vertex tag'' for this binding.

    \item
    the name of a function or the names in a pattern. These are a set
    referred to as @dvLhs@, the defined variables of the left hand side.

    \item
    the free variables of the body. These are referred to as @fvBody@.

    \item
    the definition's actual code. This is referred to as just @code@.
    \end{enumerate}

    The function @nonRecDvFv@ returns two sets of variables. The first is
    the set of variables defined in the set of monomorphic bindings, while the
    second is the set of free variables in those bindings.

    The set of variables defined in a non-recursive binding is just the
    union of all of them, as @union@ removes duplicates. However, the
    free variables in each successive set of cumulative bindings is the
    union of those in the previous set plus those of the newest binding after
    the defined variables of the previous set have been removed.

    @rnMethodBinds@ deals only with the declarations in class and
    instance declarations.  It expects only to see @FunMonoBind@s, and
    it expects the global environment to contain bindings for the binders
    (which are all class operations).

    ************************************************************************
    *                                                                      *
    \subsubsection{ Top-level bindings}
    *                                                                      *
    ************************************************************************
    -}

    -- for top-level bindings, we need to make top-level names,
    -- so we have a different entry point than for local bindings
    rnTopBindsLHS :: MiniFixityEnv
                  -> HsValBinds GhcPs
                  -> RnM (HsValBindsLR GhcRn GhcPs)
    rnTopBindsLHS :: MiniFixityEnv -> HsValBinds GhcPs -> RnM (HsValBindsLR GhcRn GhcPs)
    rnTopBindsLHS MiniFixityEnv
    fix_env HsValBinds GhcPs
    binds
      = NameMaker -> HsValBinds GhcPs -> RnM (HsValBindsLR GhcRn GhcPs)
    rnValBindsLHS (MiniFixityEnv -> NameMaker
    topRecNameMaker MiniFixityEnv
    fix_env) HsValBinds GhcPs
    binds

    rnTopBindsBoot :: NameSet -> HsValBindsLR GhcRn GhcPs
                   -> RnM (HsValBinds GhcRn, DefUses)
    -- A hs-boot file has no bindings.
    -- Return a single HsBindGroup with empty binds and renamed signatures
    rnTopBindsBoot :: NameSet
    -> HsValBindsLR GhcRn GhcPs -> RnM (HsValBinds GhcRn, DefUses)
    rnTopBindsBoot NameSet
    bound_names (ValBinds XValBinds GhcRn GhcPs
    _ LHsBindsLR GhcRn GhcPs
    mbinds [LSig GhcPs]
    sigs)
      = do  { Bool -> SDoc -> TcRn ()
    checkErr (LHsBindsLR GhcRn GhcPs -> Bool
    forall (idL :: Pass) idR. LHsBindsLR (GhcPass idL) idR -> Bool
    isEmptyLHsBinds LHsBindsLR GhcRn GhcPs
    mbinds) (LHsBindsLR GhcRn GhcPs -> SDoc
    bindsInHsBootFile LHsBindsLR GhcRn GhcPs
    mbinds)
            ; ([GenLocated SrcSpanAnnA (Sig GhcRn)]
    sigs', NameSet
    fvs) <- HsSigCtxt -> [LSig GhcPs] -> RnM ([LSig GhcRn], NameSet)
    renameSigs (NameSet -> HsSigCtxt
    HsBootCtxt NameSet
    bound_names) [LSig GhcPs]
    sigs
            ; (HsValBinds GhcRn, DefUses) -> RnM (HsValBinds GhcRn, DefUses)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XXValBindsLR GhcRn GhcRn -> HsValBinds GhcRn
    forall idL idR. XXValBindsLR idL idR -> HsValBindsLR idL idR
    XValBindsLR ([(RecFlag, LHsBinds GhcRn)] -> [LSig GhcRn] -> NHsValBindsLR GhcRn
    forall idL.
    [(RecFlag, LHsBinds idL)] -> [LSig GhcRn] -> NHsValBindsLR idL
    NValBinds [] [GenLocated SrcSpanAnnA (Sig GhcRn)]
    [LSig GhcRn]
    sigs'), NameSet -> DefUses
    usesOnly NameSet
    fvs) }
    rnTopBindsBoot NameSet
    _ HsValBindsLR GhcRn GhcPs
    b = String -> SDoc -> RnM (HsValBinds GhcRn, DefUses)
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "rnTopBindsBoot" (HsValBindsLR GhcRn GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsValBindsLR GhcRn GhcPs
    b)

    {-
    *********************************************************
    *                                                      *
                    HsLocalBinds
    *                                                      *
    *********************************************************
    -}

    rnLocalBindsAndThen :: HsLocalBinds GhcPs
                       -> (HsLocalBinds GhcRn -> FreeVars -> RnM (result, FreeVars))
                       -> RnM (result, FreeVars)
    -- This version (a) assumes that the binding vars are *not* already in scope
    --               (b) removes the binders from the free vars of the thing inside
    -- The parser doesn't produce ThenBinds
    rnLocalBindsAndThen :: forall result.
    HsLocalBinds GhcPs
    -> (HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet))
    -> RnM (result, NameSet)
    rnLocalBindsAndThen (EmptyLocalBinds XEmptyLocalBinds GhcPs GhcPs
    x) HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside =
      HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside (XEmptyLocalBinds GhcRn GhcRn -> HsLocalBinds GhcRn
    forall idL idR. XEmptyLocalBinds idL idR -> HsLocalBindsLR idL idR
    EmptyLocalBinds XEmptyLocalBinds GhcPs GhcPs
    XEmptyLocalBinds GhcRn GhcRn
    x) NameSet
    emptyNameSet

    rnLocalBindsAndThen (HsValBinds XHsValBinds GhcPs GhcPs
    x HsValBinds GhcPs
    val_binds) HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside
      = HsValBinds GhcPs
    -> (HsValBinds GhcRn -> NameSet -> RnM (result, NameSet))
    -> RnM (result, NameSet)
    forall result.
    HsValBinds GhcPs
    -> (HsValBinds GhcRn -> NameSet -> RnM (result, NameSet))
    -> RnM (result, NameSet)
    rnLocalValBindsAndThen HsValBinds GhcPs
    val_binds ((HsValBinds GhcRn -> NameSet -> RnM (result, NameSet))
     -> RnM (result, NameSet))
    -> (HsValBinds GhcRn -> NameSet -> RnM (result, NameSet))
    -> RnM (result, NameSet)
    forall a b. (a -> b) -> a -> b
    $ \ HsValBinds GhcRn
    val_binds' ->
          HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside (XHsValBinds GhcRn GhcRn -> HsValBinds GhcRn -> HsLocalBinds GhcRn
    forall idL idR.
    XHsValBinds idL idR
    -> HsValBindsLR idL idR -> HsLocalBindsLR idL idR
    HsValBinds XHsValBinds GhcPs GhcPs
    XHsValBinds GhcRn GhcRn
    x HsValBinds GhcRn
    val_binds')

    rnLocalBindsAndThen (HsIPBinds XHsIPBinds GhcPs GhcPs
    x HsIPBinds GhcPs
    binds) HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside = do
        (HsIPBinds GhcRn
    binds',NameSet
    fv_binds) <- HsIPBinds GhcPs -> RnM (HsIPBinds GhcRn, NameSet)
    rnIPBinds HsIPBinds GhcPs
    binds
        (result
    thing, NameSet
    fvs_thing) <- HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside (XHsIPBinds GhcRn GhcRn -> HsIPBinds GhcRn -> HsLocalBinds GhcRn
    forall idL idR.
    XHsIPBinds idL idR -> HsIPBinds idR -> HsLocalBindsLR idL idR
    HsIPBinds XHsIPBinds GhcPs GhcPs
    XHsIPBinds GhcRn GhcRn
    x HsIPBinds GhcRn
    binds') NameSet
    fv_binds
        (result, NameSet) -> RnM (result, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (result
    thing, NameSet
    fvs_thing NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    fv_binds)

    rnIPBinds :: HsIPBinds GhcPs -> RnM (HsIPBinds GhcRn, FreeVars)
    rnIPBinds :: HsIPBinds GhcPs -> RnM (HsIPBinds GhcRn, NameSet)
    rnIPBinds (IPBinds XIPBinds GhcPs
    _ [LIPBind GhcPs]
    ip_binds ) = do
        ([LocatedA (IPBind GhcRn)]
    ip_binds', [NameSet]
    fvs_s) <- (LocatedA (IPBind GhcPs)
     -> IOEnv
          (Env TcGblEnv TcLclEnv) (LocatedA (IPBind GhcRn), NameSet))
    -> [LocatedA (IPBind GhcPs)]
    -> IOEnv
         (Env TcGblEnv TcLclEnv) ([LocatedA (IPBind GhcRn)], [NameSet])
    forall (m :: * -> *) a b c.
    Applicative m =>
    (a -> m (b, c)) -> [a] -> m ([b], [c])
    mapAndUnzipM ((IPBind GhcPs -> TcM (IPBind GhcRn, NameSet))
    -> LocatedA (IPBind GhcPs)
    -> IOEnv (Env TcGblEnv TcLclEnv) (LocatedA (IPBind GhcRn), NameSet)
    forall a b c.
    (a -> TcM (b, c)) -> LocatedA a -> TcM (LocatedA b, c)
    wrapLocFstMA IPBind GhcPs -> TcM (IPBind GhcRn, NameSet)
    rnIPBind) [LocatedA (IPBind GhcPs)]
    [LIPBind GhcPs]
    ip_binds
        (HsIPBinds GhcRn, NameSet) -> RnM (HsIPBinds GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XIPBinds GhcRn -> [LIPBind GhcRn] -> HsIPBinds GhcRn
    forall id. XIPBinds id -> [LIPBind id] -> HsIPBinds id
    IPBinds NoExtField
    XIPBinds GhcRn
    noExtField [LocatedA (IPBind GhcRn)]
    [LIPBind GhcRn]
    ip_binds', [NameSet] -> NameSet
    plusFVs [NameSet]
    fvs_s)

    rnIPBind :: IPBind GhcPs -> RnM (IPBind GhcRn, FreeVars)
    rnIPBind :: IPBind GhcPs -> TcM (IPBind GhcRn, NameSet)
    rnIPBind (IPBind XCIPBind GhcPs
    _ ~(Left XRec GhcPs HsIPName
    n) LHsExpr GhcPs
    expr) = do
        (GenLocated SrcSpanAnnA (HsExpr GhcRn)
    expr',NameSet
    fvExpr) <- LHsExpr GhcPs -> RnM (LHsExpr GhcRn, NameSet)
    rnLExpr LHsExpr GhcPs
    expr
        (IPBind GhcRn, NameSet) -> TcM (IPBind GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XCIPBind GhcRn
    -> Either (XRec GhcRn HsIPName) (IdP GhcRn)
    -> LHsExpr GhcRn
    -> IPBind GhcRn
    forall id.
    XCIPBind id
    -> Either (XRec id HsIPName) (IdP id) -> LHsExpr id -> IPBind id
    IPBind XCIPBind GhcRn
    forall a. EpAnn a
    noAnn (GenLocated SrcSpan HsIPName
    -> Either (GenLocated SrcSpan HsIPName) Name
    forall a b. a -> Either a b
    Left GenLocated SrcSpan HsIPName
    XRec GhcPs HsIPName
    n) GenLocated SrcSpanAnnA (HsExpr GhcRn)
    LHsExpr GhcRn
    expr', NameSet
    fvExpr)

    {-
    ************************************************************************
    *                                                                      *
                    ValBinds
    *                                                                      *
    ************************************************************************
    -}

    -- Renaming local binding groups
    -- Does duplicate/shadow check
    rnLocalValBindsLHS :: MiniFixityEnv
                       -> HsValBinds GhcPs
                       -> RnM ([Name], HsValBindsLR GhcRn GhcPs)
    rnLocalValBindsLHS :: MiniFixityEnv
    -> HsValBinds GhcPs -> RnM ([Name], HsValBindsLR GhcRn GhcPs)
    rnLocalValBindsLHS MiniFixityEnv
    fix_env HsValBinds GhcPs
    binds
      = do { HsValBindsLR GhcRn GhcPs
    binds' <- NameMaker -> HsValBinds GhcPs -> RnM (HsValBindsLR GhcRn GhcPs)
    rnValBindsLHS (MiniFixityEnv -> NameMaker
    localRecNameMaker MiniFixityEnv
    fix_env) HsValBinds GhcPs
    binds

             -- Check for duplicates and shadowing
             -- Must do this *after* renaming the patterns
             -- See Note [Collect binders only after renaming] in GHC.Hs.Utils

             -- We need to check for dups here because we
             -- don't don't bind all of the variables from the ValBinds at once
             -- with bindLocatedLocals any more.
             --
             -- Note that we don't want to do this at the top level, since
             -- sorting out duplicates and shadowing there happens elsewhere.
             -- The behavior is even different. For example,
             --   import A(f)
             --   f = ...
             -- should not produce a shadowing warning (but it will produce
             -- an ambiguity warning if you use f), but
             --   import A(f)
             --   g = let f = ... in f
             -- should.
           ; let bound_names :: [IdP GhcRn]
    bound_names = CollectFlag GhcRn -> HsValBindsLR GhcRn GhcPs -> [IdP GhcRn]
    forall (idL :: Pass) (idR :: Pass).
    CollectPass (GhcPass idL) =>
    CollectFlag (GhcPass idL)
    -> HsValBindsLR (GhcPass idL) (GhcPass idR) -> [IdP (GhcPass idL)]
    collectHsValBinders CollectFlag GhcRn
    forall p. CollectFlag p
    CollNoDictBinders HsValBindsLR GhcRn GhcPs
    binds'
                 -- There should be only Ids, but if there are any bogus
                 -- pattern synonyms, we'll collect them anyway, so that
                 -- we don't generate subsequent out-of-scope messages
           ; (GlobalRdrEnv, LocalRdrEnv)
    envs <- TcRn (GlobalRdrEnv, LocalRdrEnv)
    getRdrEnvs
           ; (GlobalRdrEnv, LocalRdrEnv) -> [Name] -> TcRn ()
    checkDupAndShadowedNames (GlobalRdrEnv, LocalRdrEnv)
    envs [Name]
    [IdP GhcRn]
    bound_names

           ; ([Name], HsValBindsLR GhcRn GhcPs)
    -> RnM ([Name], HsValBindsLR GhcRn GhcPs)
    forall (m :: * -> *) a. Monad m => a -> m a
    return ([Name]
    [IdP GhcRn]
    bound_names, HsValBindsLR GhcRn GhcPs
    binds') }

    -- renames the left-hand sides
    -- generic version used both at the top level and for local binds
    -- does some error checking, but not what gets done elsewhere at the top level
    rnValBindsLHS :: NameMaker
                  -> HsValBinds GhcPs
                  -> RnM (HsValBindsLR GhcRn GhcPs)
    rnValBindsLHS :: NameMaker -> HsValBinds GhcPs -> RnM (HsValBindsLR GhcRn GhcPs)
    rnValBindsLHS NameMaker
    topP (ValBinds XValBinds GhcPs GhcPs
    x LHsBindsLR GhcPs GhcPs
    mbinds [LSig GhcPs]
    sigs)
      = do { Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    mbinds' <- (GenLocated SrcSpanAnnA (HsBindLR GhcPs GhcPs)
     -> IOEnv
          (Env TcGblEnv TcLclEnv)
          (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)))
    -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcPs GhcPs))
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)))
    forall (m :: * -> *) a b.
    Monad m =>
    (a -> m b) -> Bag a -> m (Bag b)
    mapBagM ((HsBindLR GhcPs GhcPs -> TcM (HsBindLR GhcRn GhcPs))
    -> GenLocated SrcSpanAnnA (HsBindLR GhcPs GhcPs)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    forall a b ann.
    (a -> TcM b)
    -> GenLocated (SrcSpanAnn' ann) a
    -> TcRn (GenLocated (SrcSpanAnn' ann) b)
    wrapLocMA (NameMaker
    -> SDoc -> HsBindLR GhcPs GhcPs -> TcM (HsBindLR GhcRn GhcPs)
    rnBindLHS NameMaker
    topP SDoc
    doc)) Bag (GenLocated SrcSpanAnnA (HsBindLR GhcPs GhcPs))
    LHsBindsLR GhcPs GhcPs
    mbinds
           ; HsValBindsLR GhcRn GhcPs -> RnM (HsValBindsLR GhcRn GhcPs)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HsValBindsLR GhcRn GhcPs -> RnM (HsValBindsLR GhcRn GhcPs))
    -> HsValBindsLR GhcRn GhcPs -> RnM (HsValBindsLR GhcRn GhcPs)
    forall a b. (a -> b) -> a -> b
    $ XValBinds GhcRn GhcPs
    -> LHsBindsLR GhcRn GhcPs
    -> [LSig GhcPs]
    -> HsValBindsLR GhcRn GhcPs
    forall idL idR.
    XValBinds idL idR
    -> LHsBindsLR idL idR -> [LSig idR] -> HsValBindsLR idL idR
    ValBinds XValBinds GhcPs GhcPs
    XValBinds GhcRn GhcPs
    x Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    LHsBindsLR GhcRn GhcPs
    mbinds' [LSig GhcPs]
    sigs }
      where
        bndrs :: [IdP GhcPs]
    bndrs = CollectFlag GhcPs -> LHsBindsLR GhcPs GhcPs -> [IdP GhcPs]
    forall p idR.
    CollectPass p =>
    CollectFlag p -> LHsBindsLR p idR -> [IdP p]
    collectHsBindsBinders CollectFlag GhcPs
    forall p. CollectFlag p
    CollNoDictBinders LHsBindsLR GhcPs GhcPs
    mbinds
        doc :: SDoc
    doc   = String -> SDoc
    text String
    "In the binding group for:" SDoc -> SDoc -> SDoc
    <+> (RdrName -> SDoc) -> [RdrName] -> SDoc
    forall a. (a -> SDoc) -> [a] -> SDoc
    pprWithCommas RdrName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr [RdrName]
    [IdP GhcPs]
    bndrs

    rnValBindsLHS NameMaker
    _ HsValBinds GhcPs
    b = String -> SDoc -> RnM (HsValBindsLR GhcRn GhcPs)
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "rnValBindsLHSFromDoc" (HsValBinds GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsValBinds GhcPs
    b)

    -- General version used both from the top-level and for local things
    -- Assumes the LHS vars are in scope
    --
    -- Does not bind the local fixity declarations
    rnValBindsRHS :: HsSigCtxt
                  -> HsValBindsLR GhcRn GhcPs
                  -> RnM (HsValBinds GhcRn, DefUses)

    rnValBindsRHS :: HsSigCtxt
    -> HsValBindsLR GhcRn GhcPs -> RnM (HsValBinds GhcRn, DefUses)
    rnValBindsRHS HsSigCtxt
    ctxt (ValBinds XValBinds GhcRn GhcPs
    _ LHsBindsLR GhcRn GhcPs
    mbinds [LSig GhcPs]
    sigs)
      = do { ([GenLocated SrcSpanAnnA (Sig GhcRn)]
    sigs', NameSet
    sig_fvs) <- HsSigCtxt -> [LSig GhcPs] -> RnM ([LSig GhcRn], NameSet)
    renameSigs HsSigCtxt
    ctxt [LSig GhcPs]
    sigs
           ; Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    binds_w_dus <- (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)
     -> IOEnv
          (Env TcGblEnv TcLclEnv)
          (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet))
    -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet))
    forall (m :: * -> *) a b.
    Monad m =>
    (a -> m b) -> Bag a -> m (Bag b)
    mapBagM ((Name -> [Name])
    -> LHsBindLR GhcRn GhcPs -> RnM (LHsBind GhcRn, [Name], NameSet)
    rnLBind ([LSig GhcRn] -> Name -> [Name]
    mkScopedTvFn [GenLocated SrcSpanAnnA (Sig GhcRn)]
    [LSig GhcRn]
    sigs')) Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    LHsBindsLR GhcRn GhcPs
    mbinds
           ; let !([(RecFlag, LHsBinds GhcRn)]
    anal_binds, DefUses
    anal_dus) = Bag (LHsBind GhcRn, [Name], NameSet)
    -> ([(RecFlag, LHsBinds GhcRn)], DefUses)
    depAnalBinds Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    Bag (LHsBind GhcRn, [Name], NameSet)
    binds_w_dus

           ; let patsyn_fvs :: NameSet
    patsyn_fvs = (PatSynBind GhcRn GhcRn -> NameSet -> NameSet)
    -> NameSet -> [PatSynBind GhcRn GhcRn] -> NameSet
    forall (t :: * -> *) a b.
    Foldable t =>
    (a -> b -> b) -> b -> t a -> b
    foldr (NameSet -> NameSet -> NameSet
    unionNameSet (NameSet -> NameSet -> NameSet)
    -> (PatSynBind GhcRn GhcRn -> NameSet)
    -> PatSynBind GhcRn GhcRn
    -> NameSet
    -> NameSet
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . PatSynBind GhcRn GhcRn -> NameSet
    forall idL idR. PatSynBind idL idR -> XPSB idL idR
    psb_ext) NameSet
    emptyNameSet ([PatSynBind GhcRn GhcRn] -> NameSet)
    -> [PatSynBind GhcRn GhcRn] -> NameSet
    forall a b. (a -> b) -> a -> b
    $
                              [(RecFlag, LHsBinds GhcRn)] -> [PatSynBind GhcRn GhcRn]
    forall id.
    UnXRec id =>
    [(RecFlag, LHsBinds id)] -> [PatSynBind id id]
    getPatSynBinds [(RecFlag, LHsBinds GhcRn)]
    anal_binds
                    -- The uses in binds_w_dus for PatSynBinds do not include
                    -- variables used in the patsyn builders; see
                    -- Note [Pattern synonym builders don't yield dependencies]
                    -- But psb_fvs /does/ include those builder fvs.  So we
                    -- add them back in here to avoid bogus warnings about
                    -- unused variables (#12548)

                 valbind'_dus :: DefUses
    valbind'_dus = DefUses
    anal_dus DefUses -> DefUses -> DefUses
    `plusDU` NameSet -> DefUses
    usesOnly NameSet
    sig_fvs
                                         DefUses -> DefUses -> DefUses
    `plusDU` NameSet -> DefUses
    usesOnly NameSet
    patsyn_fvs
                                -- Put the sig uses *after* the bindings
                                -- so that the binders are removed from
                                -- the uses in the sigs

            ; (HsValBinds GhcRn, DefUses) -> RnM (HsValBinds GhcRn, DefUses)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XXValBindsLR GhcRn GhcRn -> HsValBinds GhcRn
    forall idL idR. XXValBindsLR idL idR -> HsValBindsLR idL idR
    XValBindsLR ([(RecFlag, LHsBinds GhcRn)] -> [LSig GhcRn] -> NHsValBindsLR GhcRn
    forall idL.
    [(RecFlag, LHsBinds idL)] -> [LSig GhcRn] -> NHsValBindsLR idL
    NValBinds [(RecFlag, LHsBinds GhcRn)]
    anal_binds [GenLocated SrcSpanAnnA (Sig GhcRn)]
    [LSig GhcRn]
    sigs'), DefUses
    valbind'_dus) }

    rnValBindsRHS HsSigCtxt
    _ HsValBindsLR GhcRn GhcPs
    b = String -> SDoc -> RnM (HsValBinds GhcRn, DefUses)
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "rnValBindsRHS" (HsValBindsLR GhcRn GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsValBindsLR GhcRn GhcPs
    b)

    -- Wrapper for local binds
    --
    -- The *client* of this function is responsible for checking for unused binders;
    -- it doesn't (and can't: we don't have the thing inside the binds) happen here
    --
    -- The client is also responsible for bringing the fixities into scope
    rnLocalValBindsRHS :: NameSet  -- names bound by the LHSes
                       -> HsValBindsLR GhcRn GhcPs
                       -> RnM (HsValBinds GhcRn, DefUses)
    rnLocalValBindsRHS :: NameSet
    -> HsValBindsLR GhcRn GhcPs -> RnM (HsValBinds GhcRn, DefUses)
    rnLocalValBindsRHS NameSet
    bound_names HsValBindsLR GhcRn GhcPs
    binds
      = HsSigCtxt
    -> HsValBindsLR GhcRn GhcPs -> RnM (HsValBinds GhcRn, DefUses)
    rnValBindsRHS (NameSet -> HsSigCtxt
    LocalBindCtxt NameSet
    bound_names) HsValBindsLR GhcRn GhcPs
    binds

    -- for local binds
    -- wrapper that does both the left- and right-hand sides
    --
    -- here there are no local fixity decls passed in;
    -- the local fixity decls come from the ValBinds sigs
    rnLocalValBindsAndThen
      :: HsValBinds GhcPs
      -> (HsValBinds GhcRn -> FreeVars -> RnM (result, FreeVars))
      -> RnM (result, FreeVars)
    rnLocalValBindsAndThen :: forall result.
    HsValBinds GhcPs
    -> (HsValBinds GhcRn -> NameSet -> RnM (result, NameSet))
    -> RnM (result, NameSet)
    rnLocalValBindsAndThen binds :: HsValBinds GhcPs
    binds@(ValBinds XValBinds GhcPs GhcPs
    _ LHsBindsLR GhcPs GhcPs
    _ [LSig GhcPs]
    sigs) HsValBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside
     = do   {     -- (A) Create the local fixity environment
              MiniFixityEnv
    new_fixities <- [LFixitySig GhcPs] -> RnM MiniFixityEnv
    makeMiniFixityEnv [ SrcSpanAnnA
    -> FixitySig GhcPs -> GenLocated SrcSpanAnnA (FixitySig GhcPs)
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnA
    loc FixitySig GhcPs
    sig
                                                | L SrcSpanAnnA
    loc (FixSig XFixSig GhcPs
    _ FixitySig GhcPs
    sig) <- [GenLocated SrcSpanAnnA (Sig GhcPs)]
    [LSig GhcPs]
    sigs]

                  -- (B) Rename the LHSes
            ; ([Name]
    bound_names, HsValBindsLR GhcRn GhcPs
    new_lhs) <- MiniFixityEnv
    -> HsValBinds GhcPs -> RnM ([Name], HsValBindsLR GhcRn GhcPs)
    rnLocalValBindsLHS MiniFixityEnv
    new_fixities HsValBinds GhcPs
    binds

                  --     ...and bring them (and their fixities) into scope
            ; [Name] -> RnM (result, NameSet) -> RnM (result, NameSet)
    forall a. [Name] -> RnM (a, NameSet) -> RnM (a, NameSet)
    bindLocalNamesFV [Name]
    bound_names              (RnM (result, NameSet) -> RnM (result, NameSet))
    -> RnM (result, NameSet) -> RnM (result, NameSet)
    forall a b. (a -> b) -> a -> b
    $
              MiniFixityEnv
    -> [Name] -> RnM (result, NameSet) -> RnM (result, NameSet)
    forall a. MiniFixityEnv -> [Name] -> RnM a -> RnM a
    addLocalFixities MiniFixityEnv
    new_fixities [Name]
    bound_names (RnM (result, NameSet) -> RnM (result, NameSet))
    -> RnM (result, NameSet) -> RnM (result, NameSet)
    forall a b. (a -> b) -> a -> b
    $ do

            {      -- (C) Do the RHS and thing inside
              (HsValBinds GhcRn
    binds', DefUses
    dus) <- NameSet
    -> HsValBindsLR GhcRn GhcPs -> RnM (HsValBinds GhcRn, DefUses)
    rnLocalValBindsRHS ([Name] -> NameSet
    mkNameSet [Name]
    bound_names) HsValBindsLR GhcRn GhcPs
    new_lhs
            ; (result
    result, NameSet
    result_fvs) <- HsValBinds GhcRn -> NameSet -> RnM (result, NameSet)
    thing_inside HsValBinds GhcRn
    binds' (DefUses -> NameSet
    allUses DefUses
    dus)

                    -- Report unused bindings based on the (accurate)
                    -- findUses.  E.g.
                    --      let x = x in 3
                    -- should report 'x' unused
            ; let real_uses :: NameSet
    real_uses = DefUses -> NameSet -> NameSet
    findUses DefUses
    dus NameSet
    result_fvs
                  -- Insert fake uses for variables introduced implicitly by
                  -- wildcards (#4404)
                  rec_uses :: [(SrcSpan, [Name])]
    rec_uses = HsValBinds GhcRn -> [(SrcSpan, [Name])]
    forall (idR :: Pass).
    HsValBindsLR GhcRn (GhcPass idR) -> [(SrcSpan, [Name])]
    hsValBindsImplicits HsValBinds GhcRn
    binds'
                  implicit_uses :: NameSet
    implicit_uses = [Name] -> NameSet
    mkNameSet ([Name] -> NameSet) -> [Name] -> NameSet
    forall a b. (a -> b) -> a -> b
    $ ((SrcSpan, [Name]) -> [Name]) -> [(SrcSpan, [Name])] -> [Name]
    forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
    concatMap (SrcSpan, [Name]) -> [Name]
    forall a b. (a, b) -> b
    snd
                                            ([(SrcSpan, [Name])] -> [Name]) -> [(SrcSpan, [Name])] -> [Name]
    forall a b. (a -> b) -> a -> b
    $ [(SrcSpan, [Name])]
    rec_uses
            ; ((SrcSpan, [Name]) -> TcRn ()) -> [(SrcSpan, [Name])] -> TcRn ()
    forall (t :: * -> *) (m :: * -> *) a b.
    (Foldable t, Monad m) =>
    (a -> m b) -> t a -> m ()
    mapM_ (\(SrcSpan
    loc, [Name]
    ns) ->
                        SrcSpan -> NameSet -> Maybe [Name] -> TcRn ()
    checkUnusedRecordWildcard SrcSpan
    loc NameSet
    real_uses ([Name] -> Maybe [Name]
    forall a. a -> Maybe a
    Just [Name]
    ns))
                    [(SrcSpan, [Name])]
    rec_uses
            ; [Name] -> NameSet -> TcRn ()
    warnUnusedLocalBinds [Name]
    bound_names
                                          (NameSet
    real_uses NameSet -> NameSet -> NameSet
    `unionNameSet` NameSet
    implicit_uses)

            ; let
                -- The variables "used" in the val binds are:
                --   (1) the uses of the binds (allUses)
                --   (2) the FVs of the thing-inside
                all_uses :: NameSet
    all_uses = DefUses -> NameSet
    allUses DefUses
    dus NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    result_fvs
                    -- Note [Unused binding hack]
                    -- ~~~~~~~~~~~~~~~~~~~~~~~~~~
                    -- Note that *in contrast* to the above reporting of
                    -- unused bindings, (1) above uses duUses to return *all*
                    -- the uses, even if the binding is unused.  Otherwise consider:
                    --      x = 3
                    --      y = let p = x in 'x'    -- NB: p not used
                    -- If we don't "see" the dependency of 'y' on 'x', we may put the
                    -- bindings in the wrong order, and the type checker will complain
                    -- that x isn't in scope
                    --
                    -- But note that this means we won't report 'x' as unused,
                    -- whereas we would if we had { x = 3; p = x; y = 'x' }

            ; (result, NameSet) -> RnM (result, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (result
    result, NameSet
    all_uses) }}
                    -- The bound names are pruned out of all_uses
                    -- by the bindLocalNamesFV call above

    rnLocalValBindsAndThen HsValBinds GhcPs
    bs HsValBinds GhcRn -> NameSet -> RnM (result, NameSet)
    _ = String -> SDoc -> RnM (result, NameSet)
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "rnLocalValBindsAndThen" (HsValBinds GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsValBinds GhcPs
    bs)

    ---------------------

    -- renaming a single bind

    rnBindLHS :: NameMaker
              -> SDoc
              -> HsBind GhcPs
              -- returns the renamed left-hand side,
              -- and the FreeVars *of the LHS*
              -- (i.e., any free variables of the pattern)
              -> RnM (HsBindLR GhcRn GhcPs)

    rnBindLHS :: NameMaker
    -> SDoc -> HsBindLR GhcPs GhcPs -> TcM (HsBindLR GhcRn GhcPs)
    rnBindLHS NameMaker
    name_maker SDoc
    _ bind :: HsBindLR GhcPs GhcPs
    bind@(PatBind { pat_lhs :: forall idL idR. HsBindLR idL idR -> LPat idL
    pat_lhs = LPat GhcPs
    pat })
      = do
          -- we don't actually use the FV processing of rnPatsAndThen here
          (GenLocated SrcSpanAnnA (Pat GhcRn)
    pat',NameSet
    pat'_fvs) <- NameMaker -> LPat GhcPs -> RnM (LPat GhcRn, NameSet)
    rnBindPat NameMaker
    name_maker LPat GhcPs
    pat
          HsBindLR GhcRn GhcPs -> TcM (HsBindLR GhcRn GhcPs)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HsBindLR GhcPs GhcPs
    bind { pat_lhs :: LPat GhcRn
    pat_lhs = GenLocated SrcSpanAnnA (Pat GhcRn)
    LPat GhcRn
    pat', pat_ext :: XPatBind GhcRn GhcPs
    pat_ext = NameSet
    XPatBind GhcRn GhcPs
    pat'_fvs })
                    -- We temporarily store the pat's FVs in bind_fvs;
                    -- gets updated to the FVs of the whole bind
                    -- when doing the RHS below

    rnBindLHS NameMaker
    name_maker SDoc
    _ bind :: HsBindLR GhcPs GhcPs
    bind@(FunBind { fun_id :: forall idL idR. HsBindLR idL idR -> LIdP idL
    fun_id = LIdP GhcPs
    rdr_name })
      = do { GenLocated SrcSpanAnnN Name
    name <- NameMaker -> LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    applyNameMaker NameMaker
    name_maker LocatedN RdrName
    LIdP GhcPs
    rdr_name
           ; HsBindLR GhcRn GhcPs -> TcM (HsBindLR GhcRn GhcPs)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HsBindLR GhcPs GhcPs
    bind { fun_id :: LIdP GhcRn
    fun_id = GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    name
                          , fun_ext :: XFunBind GhcRn GhcPs
    fun_ext = NoExtField
    XFunBind GhcRn GhcPs
    noExtField }) }

    rnBindLHS NameMaker
    name_maker SDoc
    _ (PatSynBind XPatSynBind GhcPs GhcPs
    x psb :: PatSynBind GhcPs GhcPs
    psb@PSB{ psb_id :: forall idL idR. PatSynBind idL idR -> LIdP idL
    psb_id = LIdP GhcPs
    rdrname })
      | NameMaker -> Bool
    isTopRecNameMaker NameMaker
    name_maker
      = do { (RdrName -> TcRn ()) -> LocatedN RdrName -> TcRn ()
    forall a b ann.
    (a -> TcM b) -> GenLocated (SrcSpanAnn' ann) a -> TcM b
    addLocMA RdrName -> TcRn ()
    checkConName LocatedN RdrName
    LIdP GhcPs
    rdrname
           ; GenLocated SrcSpanAnnN Name
    name <- LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    lookupLocatedTopBndrRnN LocatedN RdrName
    LIdP GhcPs
    rdrname -- Should be in scope already
           ; HsBindLR GhcRn GhcPs -> TcM (HsBindLR GhcRn GhcPs)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XPatSynBind GhcRn GhcPs
    -> PatSynBind GhcRn GhcPs -> HsBindLR GhcRn GhcPs
    forall idL idR.
    XPatSynBind idL idR -> PatSynBind idL idR -> HsBindLR idL idR
    PatSynBind XPatSynBind GhcPs GhcPs
    XPatSynBind GhcRn GhcPs
    x PatSynBind GhcPs GhcPs
    psb{ psb_ext :: XPSB GhcRn GhcPs
    psb_ext = XPSB GhcRn GhcPs
    forall a. EpAnn a
    noAnn, psb_id :: LIdP GhcRn
    psb_id = GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    name }) }

      | Bool
    otherwise  -- Pattern synonym, not at top level
      = do { SDoc -> TcRn ()
    addErr SDoc
    localPatternSynonymErr  -- Complain, but make up a fake
                                            -- name so that we can carry on
           ; GenLocated SrcSpanAnnN Name
    name <- NameMaker -> LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    applyNameMaker NameMaker
    name_maker LocatedN RdrName
    LIdP GhcPs
    rdrname
           ; HsBindLR GhcRn GhcPs -> TcM (HsBindLR GhcRn GhcPs)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XPatSynBind GhcRn GhcPs
    -> PatSynBind GhcRn GhcPs -> HsBindLR GhcRn GhcPs
    forall idL idR.
    XPatSynBind idL idR -> PatSynBind idL idR -> HsBindLR idL idR
    PatSynBind XPatSynBind GhcPs GhcPs
    XPatSynBind GhcRn GhcPs
    x PatSynBind GhcPs GhcPs
    psb{ psb_ext :: XPSB GhcRn GhcPs
    psb_ext = XPSB GhcRn GhcPs
    forall a. EpAnn a
    noAnn, psb_id :: LIdP GhcRn
    psb_id = GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    name }) }
      where
        localPatternSynonymErr :: SDoc
        localPatternSynonymErr :: SDoc
    localPatternSynonymErr
          = SDoc -> Int -> SDoc -> SDoc
    hang (String -> SDoc
    text String
    "Illegal pattern synonym declaration for" SDoc -> SDoc -> SDoc
    <+> SDoc -> SDoc
    quotes (LocatedN RdrName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr LocatedN RdrName
    LIdP GhcPs
    rdrname))
               Int
    2 (String -> SDoc
    text String
    "Pattern synonym declarations are only valid at top level")

    rnBindLHS NameMaker
    _ SDoc
    _ HsBindLR GhcPs GhcPs
    b = String -> SDoc -> TcM (HsBindLR GhcRn GhcPs)
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "rnBindHS" (HsBindLR GhcPs GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsBindLR GhcPs GhcPs
    b)

    rnLBind :: (Name -> [Name])      -- Signature tyvar function
            -> LHsBindLR GhcRn GhcPs
            -> RnM (LHsBind GhcRn, [Name], Uses)
    rnLBind :: (Name -> [Name])
    -> LHsBindLR GhcRn GhcPs -> RnM (LHsBind GhcRn, [Name], NameSet)
    rnLBind Name -> [Name]
    sig_fn (L SrcSpanAnnA
    loc HsBindLR GhcRn GhcPs
    bind)
      = SrcSpanAnnA
    -> RnM (LHsBind GhcRn, [Name], NameSet)
    -> RnM (LHsBind GhcRn, [Name], NameSet)
    forall ann a. SrcSpanAnn' ann -> TcRn a -> TcRn a
    setSrcSpanA SrcSpanAnnA
    loc (RnM (LHsBind GhcRn, [Name], NameSet)
     -> RnM (LHsBind GhcRn, [Name], NameSet))
    -> RnM (LHsBind GhcRn, [Name], NameSet)
    -> RnM (LHsBind GhcRn, [Name], NameSet)
    forall a b. (a -> b) -> a -> b
    $
        do { (HsBind GhcRn
    bind', [Name]
    bndrs, NameSet
    dus) <- (Name -> [Name])
    -> HsBindLR GhcRn GhcPs -> RnM (HsBind GhcRn, [Name], NameSet)
    rnBind Name -> [Name]
    sig_fn HsBindLR GhcRn GhcPs
    bind
           ; (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (SrcSpanAnnA
    -> HsBind GhcRn -> GenLocated SrcSpanAnnA (HsBind GhcRn)
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnA
    loc HsBind GhcRn
    bind', [Name]
    bndrs, NameSet
    dus) }

    -- assumes the left-hands-side vars are in scope
    rnBind :: (Name -> [Name])        -- Signature tyvar function
           -> HsBindLR GhcRn GhcPs
           -> RnM (HsBind GhcRn, [Name], Uses)
    rnBind :: (Name -> [Name])
    -> HsBindLR GhcRn GhcPs -> RnM (HsBind GhcRn, [Name], NameSet)
    rnBind Name -> [Name]
    _ bind :: HsBindLR GhcRn GhcPs
    bind@(PatBind { pat_lhs :: forall idL idR. HsBindLR idL idR -> LPat idL
    pat_lhs = LPat GhcRn
    pat
                           , pat_rhs :: forall idL idR. HsBindLR idL idR -> GRHSs idR (LHsExpr idR)
    pat_rhs = GRHSs GhcPs (LHsExpr GhcPs)
    grhss
                                       -- pat fvs were stored in bind_fvs
                                       -- after processing the LHS
                           , pat_ext :: forall idL idR. HsBindLR idL idR -> XPatBind idL idR
    pat_ext = XPatBind GhcRn GhcPs
    pat_fvs })
      = do  { Module
    mod <- IOEnv (Env TcGblEnv TcLclEnv) Module
    forall (m :: * -> *). HasModule m => m Module
    getModule
            ; (GRHSs GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    grhss', NameSet
    rhs_fvs) <- HsMatchContext GhcRn
    -> (LocatedA (HsExpr GhcPs)
        -> IOEnv
             (Env TcGblEnv TcLclEnv)
             (GenLocated SrcSpanAnnA (HsExpr GhcRn), NameSet))
    -> GRHSs GhcPs (LocatedA (HsExpr GhcPs))
    -> RnM
         (GRHSs GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> GRHSs GhcPs (LocatedA (body GhcPs))
    -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    rnGRHSs HsMatchContext GhcRn
    forall p. HsMatchContext p
    PatBindRhs LocatedA (HsExpr GhcPs)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (GenLocated SrcSpanAnnA (HsExpr GhcRn), NameSet)
    LHsExpr GhcPs -> RnM (LHsExpr GhcRn, NameSet)
    rnLExpr GRHSs GhcPs (LocatedA (HsExpr GhcPs))
    GRHSs GhcPs (LHsExpr GhcPs)
    grhss

                    -- No scoped type variables for pattern bindings
            ; let all_fvs :: NameSet
    all_fvs = NameSet
    XPatBind GhcRn GhcPs
    pat_fvs NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    rhs_fvs
                  fvs' :: NameSet
    fvs'    = (Name -> Bool) -> NameSet -> NameSet
    filterNameSet (Module -> Name -> Bool
    nameIsLocalOrFrom Module
    mod) NameSet
    all_fvs
                    -- Keep locally-defined Names
                    -- As well as dependency analysis, we need these for the
                    -- MonoLocalBinds test in GHC.Tc.Gen.Bind.decideGeneralisationPlan
                  bndrs :: [IdP GhcRn]
    bndrs = CollectFlag GhcRn -> LPat GhcRn -> [IdP GhcRn]
    forall p. CollectPass p => CollectFlag p -> LPat p -> [IdP p]
    collectPatBinders CollectFlag GhcRn
    forall p. CollectFlag p
    CollNoDictBinders LPat GhcRn
    pat
                  bind' :: HsBind GhcRn
    bind' = HsBindLR GhcRn GhcPs
    bind { pat_rhs :: GRHSs GhcRn (LHsExpr GhcRn)
    pat_rhs  = GRHSs GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    GRHSs GhcRn (LHsExpr GhcRn)
    grhss'
                               , pat_ext :: XPatBind GhcRn GhcRn
    pat_ext = NameSet
    XPatBind GhcRn GhcRn
    fvs' }

                  ok_nobind_pat :: Bool
    ok_nobind_pat
                      = -- See Note [Pattern bindings that bind no variables]
                        case GenLocated SrcSpanAnnA (Pat GhcRn) -> Pat GhcRn
    forall l e. GenLocated l e -> e
    unLoc GenLocated SrcSpanAnnA (Pat GhcRn)
    LPat GhcRn
    pat of
                           WildPat {}   -> Bool
    True
                           BangPat {}   -> Bool
    True -- #9127, #13646
                           SplicePat {} -> Bool
    True
                           Pat GhcRn
    _            -> Bool
    False

            -- Warn if the pattern binds no variables
            -- See Note [Pattern bindings that bind no variables]
            ; WarningFlag -> TcRn () -> TcRn ()
    forall gbl lcl.
    WarningFlag -> TcRnIf gbl lcl () -> TcRnIf gbl lcl ()
    whenWOptM WarningFlag
    Opt_WarnUnusedPatternBinds (TcRn () -> TcRn ()) -> TcRn () -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
              Bool -> TcRn () -> TcRn ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when ([Name] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null [Name]
    [IdP GhcRn]
    bndrs Bool -> Bool -> Bool
    && Bool -> Bool
    not Bool
    ok_nobind_pat) (TcRn () -> TcRn ()) -> TcRn () -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
              WarnReason -> SDoc -> TcRn ()
    addWarn (WarningFlag -> WarnReason
    Reason WarningFlag
    Opt_WarnUnusedPatternBinds) (SDoc -> TcRn ()) -> SDoc -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
              HsBind GhcRn -> SDoc
    unusedPatBindWarn HsBind GhcRn
    bind'

            ; NameSet
    fvs' NameSet
    -> RnM (HsBind GhcRn, [Name], NameSet)
    -> RnM (HsBind GhcRn, [Name], NameSet)
    `seq` -- See Note [Free-variable space leak]
              (HsBind GhcRn, [Name], NameSet)
    -> RnM (HsBind GhcRn, [Name], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HsBind GhcRn
    bind', [Name]
    [IdP GhcRn]
    bndrs, NameSet
    all_fvs) }

    rnBind Name -> [Name]
    sig_fn bind :: HsBindLR GhcRn GhcPs
    bind@(FunBind { fun_id :: forall idL idR. HsBindLR idL idR -> LIdP idL
    fun_id = LIdP GhcRn
    name
                                , fun_matches :: forall idL idR. HsBindLR idL idR -> MatchGroup idR (LHsExpr idR)
    fun_matches = MatchGroup GhcPs (LHsExpr GhcPs)
    matches })
           -- invariant: no free vars here when it's a FunBind
      = do  { let plain_name :: Name
    plain_name = GenLocated SrcSpanAnnN Name -> Name
    forall l e. GenLocated l e -> e
    unLoc GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    name

            ; (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    matches', NameSet
    rhs_fvs) <- [Name]
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    forall a. [Name] -> RnM (a, NameSet) -> RnM (a, NameSet)
    bindSigTyVarsFV (Name -> [Name]
    sig_fn Name
    plain_name) (RnM
       (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
     -> RnM
          (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)),
           NameSet))
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    forall a b. (a -> b) -> a -> b
    $
                                    -- bindSigTyVars tests for LangExt.ScopedTyVars
                                     HsMatchContext GhcRn
    -> (LocatedA (HsExpr GhcPs)
        -> IOEnv
             (Env TcGblEnv TcLclEnv)
             (GenLocated SrcSpanAnnA (HsExpr GhcRn), NameSet))
    -> MatchGroup GhcPs (LocatedA (HsExpr GhcPs))
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    forall (body :: * -> *).
    (Outputable (body GhcPs), AnnoBody body) =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> MatchGroup GhcPs (LocatedA (body GhcPs))
    -> RnM (MatchGroup GhcRn (LocatedA (body GhcRn)), NameSet)
    rnMatchGroup (LIdP GhcRn -> HsMatchContext GhcRn
    forall p. LIdP p -> HsMatchContext p
    mkPrefixFunRhs LIdP GhcRn
    name)
                                                  LocatedA (HsExpr GhcPs)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (GenLocated SrcSpanAnnA (HsExpr GhcRn), NameSet)
    LHsExpr GhcPs -> RnM (LHsExpr GhcRn, NameSet)
    rnLExpr MatchGroup GhcPs (LocatedA (HsExpr GhcPs))
    MatchGroup GhcPs (LHsExpr GhcPs)
    matches
            ; let is_infix :: Bool
    is_infix = HsBindLR GhcRn GhcPs -> Bool
    forall id1 id2. UnXRec id2 => HsBindLR id1 id2 -> Bool
    isInfixFunBind HsBindLR GhcRn GhcPs
    bind
            ; Bool -> TcRn () -> TcRn ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when Bool
    is_infix (TcRn () -> TcRn ()) -> TcRn () -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $ Name
    -> MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    -> TcRn ()
    forall body. Name -> MatchGroup GhcRn body -> TcRn ()
    checkPrecMatch Name
    plain_name MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    matches'

            ; Module
    mod <- IOEnv (Env TcGblEnv TcLclEnv) Module
    forall (m :: * -> *). HasModule m => m Module
    getModule
            ; let fvs' :: NameSet
    fvs' = (Name -> Bool) -> NameSet -> NameSet
    filterNameSet (Module -> Name -> Bool
    nameIsLocalOrFrom Module
    mod) NameSet
    rhs_fvs
                    -- Keep locally-defined Names
                    -- As well as dependency analysis, we need these for the
                    -- MonoLocalBinds test in GHC.Tc.Gen.Bind.decideGeneralisationPlan

            ; NameSet
    fvs' NameSet
    -> RnM (HsBind GhcRn, [Name], NameSet)
    -> RnM (HsBind GhcRn, [Name], NameSet)
    `seq` -- See Note [Free-variable space leak]
              (HsBind GhcRn, [Name], NameSet)
    -> RnM (HsBind GhcRn, [Name], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HsBindLR GhcRn GhcPs
    bind { fun_matches :: MatchGroup GhcRn (LHsExpr GhcRn)
    fun_matches = MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    MatchGroup GhcRn (LHsExpr GhcRn)
    matches'
                           , fun_ext :: XFunBind GhcRn GhcRn
    fun_ext     = NameSet
    XFunBind GhcRn GhcRn
    fvs' },
                      [Name
    plain_name], NameSet
    rhs_fvs)
          }

    rnBind Name -> [Name]
    sig_fn (PatSynBind XPatSynBind GhcRn GhcPs
    x PatSynBind GhcRn GhcPs
    bind)
      = do  { (PatSynBind GhcRn GhcRn
    bind', [Name]
    name, NameSet
    fvs) <- (Name -> [Name])
    -> PatSynBind GhcRn GhcPs
    -> RnM (PatSynBind GhcRn GhcRn, [Name], NameSet)
    rnPatSynBind Name -> [Name]
    sig_fn PatSynBind GhcRn GhcPs
    bind
            ; (HsBind GhcRn, [Name], NameSet)
    -> RnM (HsBind GhcRn, [Name], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XPatSynBind GhcRn GhcRn -> PatSynBind GhcRn GhcRn -> HsBind GhcRn
    forall idL idR.
    XPatSynBind idL idR -> PatSynBind idL idR -> HsBindLR idL idR
    PatSynBind XPatSynBind GhcRn GhcPs
    XPatSynBind GhcRn GhcRn
    x PatSynBind GhcRn GhcRn
    bind', [Name]
    name, NameSet
    fvs) }

    rnBind Name -> [Name]
    _ HsBindLR GhcRn GhcPs
    b = String -> SDoc -> RnM (HsBind GhcRn, [Name], NameSet)
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "rnBind" (HsBindLR GhcRn GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsBindLR GhcRn GhcPs
    b)

    {- Note [Pattern bindings that bind no variables]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    Generally, we want to warn about pattern bindings like
      Just _ = e
    because they don't do anything!  But we have three exceptions:

    * A wildcard pattern
           _ = rhs
      which (a) is not that different from  _v = rhs
            (b) is sometimes used to give a type sig for,
                or an occurrence of, a variable on the RHS

    * A strict pattern binding; that is, one with an outermost bang
         !Just _ = e
      This can fail, so unlike the lazy variant, it is not a no-op.
      Moreover, #13646 argues that even for single constructor
      types, you might want to write the constructor.  See also #9127.

    * A splice pattern
          $(th-lhs) = rhs
       It is impossible to determine whether or not th-lhs really
       binds any variable. We should disable the warning for any pattern
       which contain splices, but that is a more expensive check.

    Note [Free-variable space leak]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    We have
        fvs' = trim fvs
    and we seq fvs' before turning it as part of a record.

    The reason is that trim is sometimes something like
        \xs -> intersectNameSet (mkNameSet bound_names) xs
    and we don't want to retain the list bound_names. This showed up in
    trac ticket #1136.
    -}

    {- *********************************************************************
    *                                                                      *
              Dependency analysis and other support functions
    *                                                                      *
    ********************************************************************* -}

    depAnalBinds :: Bag (LHsBind GhcRn, [Name], Uses)
                 -> ([(RecFlag, LHsBinds GhcRn)], DefUses)
    -- Dependency analysis; this is important so that
    -- unused-binding reporting is accurate
    depAnalBinds :: Bag (LHsBind GhcRn, [Name], NameSet)
    -> ([(RecFlag, LHsBinds GhcRn)], DefUses)
    depAnalBinds Bag (LHsBind GhcRn, [Name], NameSet)
    binds_w_dus
      = ((SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
     -> (RecFlag, Bag (GenLocated SrcSpanAnnA (HsBind GhcRn))))
    -> [SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    -> [(RecFlag, Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)))]
    forall a b. (a -> b) -> [a] -> [b]
    map SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    -> (RecFlag, Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)))
    forall {a} {b} {c}. SCC (a, b, c) -> (RecFlag, Bag a)
    get_binds [SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    sccs, [DefUse] -> DefUses
    forall a. [a] -> OrdList a
    toOL ([DefUse] -> DefUses) -> [DefUse] -> DefUses
    forall a b. (a -> b) -> a -> b
    $ (SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
     -> DefUse)
    -> [SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    -> [DefUse]
    forall a b. (a -> b) -> [a] -> [b]
    map SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    -> DefUse
    forall {a}. SCC (a, [Name], NameSet) -> DefUse
    get_du [SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    sccs)
      where
        sccs :: [SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    sccs = ((GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
     -> [Name])
    -> ((GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
        -> [Name])
    -> [(GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    -> [SCC (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    forall node.
    (node -> [Name]) -> (node -> [Name]) -> [node] -> [SCC node]
    depAnal (\(GenLocated SrcSpanAnnA (HsBind GhcRn)
    _, [Name]
    defs, NameSet
    _) -> [Name]
    defs)
                       (\(GenLocated SrcSpanAnnA (HsBind GhcRn)
    _, [Name]
    _, NameSet
    uses) -> NameSet -> [Name]
    forall elt. UniqSet elt -> [elt]
    nonDetEltsUniqSet NameSet
    uses)
                       -- It's OK to use nonDetEltsUniqSet here as explained in
                       -- Note [depAnal determinism] in GHC.Types.Name.Env.
                       (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    -> [(GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)]
    forall a. Bag a -> [a]
    bagToList Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    Bag (LHsBind GhcRn, [Name], NameSet)
    binds_w_dus)

        get_binds :: SCC (a, b, c) -> (RecFlag, Bag a)
    get_binds (AcyclicSCC (a
    bind, b
    _, c
    _)) = (RecFlag
    NonRecursive, a -> Bag a
    forall a. a -> Bag a
    unitBag a
    bind)
        get_binds (CyclicSCC  [(a, b, c)]
    binds_w_dus)  = (RecFlag
    Recursive, [a] -> Bag a
    forall a. [a] -> Bag a
    listToBag [a
    b | (a
    b,b
    _,c
    _) <- [(a, b, c)]
    binds_w_dus])

        get_du :: SCC (a, [Name], NameSet) -> DefUse
    get_du (AcyclicSCC (a
    _, [Name]
    bndrs, NameSet
    uses)) = (NameSet -> Maybe NameSet
    forall a. a -> Maybe a
    Just ([Name] -> NameSet
    mkNameSet [Name]
    bndrs), NameSet
    uses)
        get_du (CyclicSCC  [(a, [Name], NameSet)]
    binds_w_dus)      = (NameSet -> Maybe NameSet
    forall a. a -> Maybe a
    Just NameSet
    defs, NameSet
    uses)
            where
              defs :: NameSet
    defs = [Name] -> NameSet
    mkNameSet [Name
    b | (a
    _,[Name]
    bs,NameSet
    _) <- [(a, [Name], NameSet)]
    binds_w_dus, Name
    b <- [Name]
    bs]
              uses :: NameSet
    uses = [NameSet] -> NameSet
    unionNameSets [NameSet
    u | (a
    _,[Name]
    _,NameSet
    u) <- [(a, [Name], NameSet)]
    binds_w_dus]

    ---------------------
    -- Bind the top-level forall'd type variables in the sigs.
    -- E.g  f :: forall a. a -> a
    --      f = rhs
    --      The 'a' scopes over the rhs
    --
    -- NB: there'll usually be just one (for a function binding)
    --     but if there are many, one may shadow the rest; too bad!
    --      e.g  x :: forall a. [a] -> [a]
    --           y :: forall a. [(a,a)] -> a
    --           (x,y) = e
    --      In e, 'a' will be in scope, and it'll be the one from 'y'!

    mkScopedTvFn :: [LSig GhcRn] -> (Name -> [Name])
    -- Return a lookup function that maps an Id Name to the names
    -- of the type variables that should scope over its body.
    mkScopedTvFn :: [LSig GhcRn] -> Name -> [Name]
    mkScopedTvFn [LSig GhcRn]
    sigs = \Name
    n -> NameEnv [Name] -> Name -> Maybe [Name]
    forall a. NameEnv a -> Name -> Maybe a
    lookupNameEnv NameEnv [Name]
    env Name
    n Maybe [Name] -> [Name] -> [Name]
    forall a. Maybe a -> a -> a
    `orElse` []
      where
        env :: NameEnv [Name]
    env = (LSig GhcRn -> Maybe ([GenLocated SrcSpanAnnN Name], [Name]))
    -> [LSig GhcRn] -> NameEnv [Name]
    forall a.
    (LSig GhcRn -> Maybe ([GenLocated SrcSpanAnnN Name], a))
    -> [LSig GhcRn] -> NameEnv a
    mkHsSigEnv LSig GhcRn -> Maybe ([GenLocated SrcSpanAnnN Name], [Name])
    get_scoped_tvs [LSig GhcRn]
    sigs

        get_scoped_tvs :: LSig GhcRn -> Maybe ([LocatedN Name], [Name])
        -- Returns (binders, scoped tvs for those binders)
        get_scoped_tvs :: LSig GhcRn -> Maybe ([GenLocated SrcSpanAnnN Name], [Name])
    get_scoped_tvs (L SrcSpanAnnA
    _ (ClassOpSig XClassOpSig GhcRn
    _ Bool
    _ [LIdP GhcRn]
    names LHsSigType GhcRn
    sig_ty))
          = ([GenLocated SrcSpanAnnN Name], [Name])
    -> Maybe ([GenLocated SrcSpanAnnN Name], [Name])
    forall a. a -> Maybe a
    Just ([GenLocated SrcSpanAnnN Name]
    [LIdP GhcRn]
    names, LHsSigType GhcRn -> [Name]
    hsScopedTvs LHsSigType GhcRn
    sig_ty)
        get_scoped_tvs (L SrcSpanAnnA
    _ (TypeSig XTypeSig GhcRn
    _ [LIdP GhcRn]
    names LHsSigWcType GhcRn
    sig_ty))
          = ([GenLocated SrcSpanAnnN Name], [Name])
    -> Maybe ([GenLocated SrcSpanAnnN Name], [Name])
    forall a. a -> Maybe a
    Just ([GenLocated SrcSpanAnnN Name]
    [LIdP GhcRn]
    names, LHsSigWcType GhcRn -> [Name]
    hsWcScopedTvs LHsSigWcType GhcRn
    sig_ty)
        get_scoped_tvs (L SrcSpanAnnA
    _ (PatSynSig XPatSynSig GhcRn
    _ [LIdP GhcRn]
    names LHsSigType GhcRn
    sig_ty))
          = ([GenLocated SrcSpanAnnN Name], [Name])
    -> Maybe ([GenLocated SrcSpanAnnN Name], [Name])
    forall a. a -> Maybe a
    Just ([GenLocated SrcSpanAnnN Name]
    [LIdP GhcRn]
    names, LHsSigType GhcRn -> [Name]
    hsScopedTvs LHsSigType GhcRn
    sig_ty)
        get_scoped_tvs LSig GhcRn
    _ = Maybe ([GenLocated SrcSpanAnnN Name], [Name])
    forall a. Maybe a
    Nothing

    -- Process the fixity declarations, making a FastString -> (Located Fixity) map
    -- (We keep the location around for reporting duplicate fixity declarations.)
    --
    -- Checks for duplicates, but not that only locally defined things are fixed.
    -- Note: for local fixity declarations, duplicates would also be checked in
    --       check_sigs below.  But we also use this function at the top level.

    makeMiniFixityEnv :: [LFixitySig GhcPs] -> RnM MiniFixityEnv

    makeMiniFixityEnv :: [LFixitySig GhcPs] -> RnM MiniFixityEnv
    makeMiniFixityEnv [LFixitySig GhcPs]
    decls = (MiniFixityEnv
     -> GenLocated SrcSpanAnnA (FixitySig GhcPs) -> RnM MiniFixityEnv)
    -> MiniFixityEnv
    -> [GenLocated SrcSpanAnnA (FixitySig GhcPs)]
    -> RnM MiniFixityEnv
    forall (t :: * -> *) (m :: * -> *) b a.
    (Foldable t, Monad m) =>
    (b -> a -> m b) -> b -> t a -> m b
    foldlM MiniFixityEnv
    -> GenLocated SrcSpanAnnA (FixitySig GhcPs) -> RnM MiniFixityEnv
    MiniFixityEnv -> LFixitySig GhcPs -> RnM MiniFixityEnv
    add_one_sig MiniFixityEnv
    forall a. FastStringEnv a
    emptyFsEnv [GenLocated SrcSpanAnnA (FixitySig GhcPs)]
    [LFixitySig GhcPs]
    decls
     where
       add_one_sig :: MiniFixityEnv -> LFixitySig GhcPs -> RnM MiniFixityEnv
       add_one_sig :: MiniFixityEnv -> LFixitySig GhcPs -> RnM MiniFixityEnv
    add_one_sig MiniFixityEnv
    env (L SrcSpanAnnA
    loc (FixitySig XFixitySig GhcPs
    _ [LIdP GhcPs]
    names Fixity
    fixity)) =
         (MiniFixityEnv
     -> (SrcSpan, SrcSpan, RdrName, Fixity) -> RnM MiniFixityEnv)
    -> MiniFixityEnv
    -> [(SrcSpan, SrcSpan, RdrName, Fixity)]
    -> RnM MiniFixityEnv
    forall (t :: * -> *) (m :: * -> *) b a.
    (Foldable t, Monad m) =>
    (b -> a -> m b) -> b -> t a -> m b
    foldlM MiniFixityEnv
    -> (SrcSpan, SrcSpan, RdrName, Fixity) -> RnM MiniFixityEnv
    forall {e}.
    FastStringEnv (GenLocated SrcSpan e)
    -> (SrcSpan, SrcSpan, RdrName, e)
    -> IOEnv
         (Env TcGblEnv TcLclEnv) (FastStringEnv (GenLocated SrcSpan e))
    add_one MiniFixityEnv
    env [ (SrcSpanAnnA -> SrcSpan
    forall a. SrcSpanAnn' a -> SrcSpan
    locA SrcSpanAnnA
    loc,SrcSpanAnnN -> SrcSpan
    forall a. SrcSpanAnn' a -> SrcSpan
    locA SrcSpanAnnN
    name_loc,RdrName
    name,Fixity
    fixity)
                            | L SrcSpanAnnN
    name_loc RdrName
    name <- [LocatedN RdrName]
    [LIdP GhcPs]
    names ]

       add_one :: FastStringEnv (GenLocated SrcSpan e)
    -> (SrcSpan, SrcSpan, RdrName, e)
    -> IOEnv
         (Env TcGblEnv TcLclEnv) (FastStringEnv (GenLocated SrcSpan e))
    add_one FastStringEnv (GenLocated SrcSpan e)
    env (SrcSpan
    loc, SrcSpan
    name_loc, RdrName
    name,e
    fixity) = do
         { -- this fixity decl is a duplicate iff
           -- the ReaderName's OccName's FastString is already in the env
           -- (we only need to check the local fix_env because
           --  definitions of non-local will be caught elsewhere)
           let { fs :: FastString
    fs = OccName -> FastString
    occNameFS (RdrName -> OccName
    rdrNameOcc RdrName
    name)
               ; fix_item :: GenLocated SrcSpan e
    fix_item = SrcSpan -> e -> GenLocated SrcSpan e
    forall l e. l -> e -> GenLocated l e
    L SrcSpan
    loc e
    fixity };

           case FastStringEnv (GenLocated SrcSpan e)
    -> FastString -> Maybe (GenLocated SrcSpan e)
    forall a. FastStringEnv a -> FastString -> Maybe a
    lookupFsEnv FastStringEnv (GenLocated SrcSpan e)
    env FastString
    fs of
             Maybe (GenLocated SrcSpan e)
    Nothing -> FastStringEnv (GenLocated SrcSpan e)
    -> IOEnv
         (Env TcGblEnv TcLclEnv) (FastStringEnv (GenLocated SrcSpan e))
    forall (m :: * -> *) a. Monad m => a -> m a
    return (FastStringEnv (GenLocated SrcSpan e)
     -> IOEnv
          (Env TcGblEnv TcLclEnv) (FastStringEnv (GenLocated SrcSpan e)))
    -> FastStringEnv (GenLocated SrcSpan e)
    -> IOEnv
         (Env TcGblEnv TcLclEnv) (FastStringEnv (GenLocated SrcSpan e))
    forall a b. (a -> b) -> a -> b
    $ FastStringEnv (GenLocated SrcSpan e)
    -> FastString
    -> GenLocated SrcSpan e
    -> FastStringEnv (GenLocated SrcSpan e)
    forall a. FastStringEnv a -> FastString -> a -> FastStringEnv a
    extendFsEnv FastStringEnv (GenLocated SrcSpan e)
    env FastString
    fs GenLocated SrcSpan e
    fix_item
             Just (L SrcSpan
    loc' e
    _) -> do
               { SrcSpan -> TcRn () -> TcRn ()
    forall a. SrcSpan -> TcRn a -> TcRn a
    setSrcSpan SrcSpan
    loc (TcRn () -> TcRn ()) -> TcRn () -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
                 SrcSpan -> SDoc -> TcRn ()
    addErrAt SrcSpan
    name_loc (SrcSpan -> RdrName -> SDoc
    dupFixityDecl SrcSpan
    loc' RdrName
    name)
               ; FastStringEnv (GenLocated SrcSpan e)
    -> IOEnv
         (Env TcGblEnv TcLclEnv) (FastStringEnv (GenLocated SrcSpan e))
    forall (m :: * -> *) a. Monad m => a -> m a
    return FastStringEnv (GenLocated SrcSpan e)
    env}
         }

    dupFixityDecl :: SrcSpan -> RdrName -> SDoc
    dupFixityDecl :: SrcSpan -> RdrName -> SDoc
    dupFixityDecl SrcSpan
    loc RdrName
    rdr_name
      = [SDoc] -> SDoc
    vcat [String -> SDoc
    text String
    "Multiple fixity declarations for" SDoc -> SDoc -> SDoc
    <+> SDoc -> SDoc
    quotes (RdrName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr RdrName
    rdr_name),
              String -> SDoc
    text String
    "also at " SDoc -> SDoc -> SDoc
    <+> SrcSpan -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr SrcSpan
    loc]

    {- *********************************************************************
    *                                                                      *
                    Pattern synonym bindings
    *                                                                      *
    ********************************************************************* -}

    rnPatSynBind :: (Name -> [Name])           -- Signature tyvar function
                 -> PatSynBind GhcRn GhcPs
                 -> RnM (PatSynBind GhcRn GhcRn, [Name], Uses)
    rnPatSynBind :: (Name -> [Name])
    -> PatSynBind GhcRn GhcPs
    -> RnM (PatSynBind GhcRn GhcRn, [Name], NameSet)
    rnPatSynBind Name -> [Name]
    sig_fn bind :: PatSynBind GhcRn GhcPs
    bind@(PSB { psb_id :: forall idL idR. PatSynBind idL idR -> LIdP idL
    psb_id = L SrcSpanAnnN
    l Name
    name
                                  , psb_args :: forall idL idR. PatSynBind idL idR -> HsPatSynDetails idR
    psb_args = HsPatSynDetails GhcPs
    details
                                  , psb_def :: forall idL idR. PatSynBind idL idR -> LPat idR
    psb_def = LPat GhcPs
    pat
                                  , psb_dir :: forall idL idR. PatSynBind idL idR -> HsPatSynDir idR
    psb_dir = HsPatSynDir GhcPs
    dir })
           -- invariant: no free vars here when it's a FunBind
      = do  { Bool
    pattern_synonym_ok <- Extension -> TcRnIf TcGblEnv TcLclEnv Bool
    forall gbl lcl. Extension -> TcRnIf gbl lcl Bool
    xoptM Extension
    LangExt.PatternSynonyms
            ; Bool -> TcRn () -> TcRn ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    unless Bool
    pattern_synonym_ok (SDoc -> TcRn ()
    addErr SDoc
    patternSynonymErr)
            ; let scoped_tvs :: [Name]
    scoped_tvs = Name -> [Name]
    sig_fn Name
    name

            ; ((GenLocated SrcSpanAnnA (Pat GhcRn)
    pat', HsConDetails
      Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]
    details'), NameSet
    fvs1) <- [Name]
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    forall a. [Name] -> RnM (a, NameSet) -> RnM (a, NameSet)
    bindSigTyVarsFV [Name]
    scoped_tvs (RnM
       ((GenLocated SrcSpanAnnA (Pat GhcRn),
         HsConDetails
           Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
        NameSet)
     -> RnM
          ((GenLocated SrcSpanAnnA (Pat GhcRn),
            HsConDetails
              Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
           NameSet))
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    forall a b. (a -> b) -> a -> b
    $
                                          HsMatchContext GhcRn
    -> LPat GhcPs
    -> (LPat GhcRn
        -> RnM
             ((GenLocated SrcSpanAnnA (Pat GhcRn),
               HsConDetails
                 Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
              NameSet))
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    forall a.
    HsMatchContext GhcRn
    -> LPat GhcPs
    -> (LPat GhcRn -> RnM (a, NameSet))
    -> RnM (a, NameSet)
    rnPat HsMatchContext GhcRn
    forall p. HsMatchContext p
    PatSyn LPat GhcPs
    pat ((LPat GhcRn
      -> RnM
           ((GenLocated SrcSpanAnnA (Pat GhcRn),
             HsConDetails
               Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
            NameSet))
     -> RnM
          ((GenLocated SrcSpanAnnA (Pat GhcRn),
            HsConDetails
              Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
           NameSet))
    -> (LPat GhcRn
        -> RnM
             ((GenLocated SrcSpanAnnA (Pat GhcRn),
               HsConDetails
                 Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
              NameSet))
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    forall a b. (a -> b) -> a -> b
    $ \LPat GhcRn
    pat' ->
             -- We check the 'RdrName's instead of the 'Name's
             -- so that the binding locations are reported
             -- from the left-hand side
                case HsPatSynDetails GhcPs
    details of
                   PrefixCon [Void]
    _ [LIdP GhcPs]
    vars ->
                       do { [LocatedN RdrName] -> TcRn ()
    checkDupRdrNamesN [LocatedN RdrName]
    [LIdP GhcPs]
    vars
                          ; [GenLocated SrcSpanAnnN Name]
    names <- (LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name))
    -> [LocatedN RdrName]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall (t :: * -> *) (m :: * -> *) a b.
    (Traversable t, Monad m) =>
    (a -> m b) -> t a -> m (t b)
    mapM LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall {ann}.
    GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupPatSynBndr [LocatedN RdrName]
    [LIdP GhcPs]
    vars
                          ; ((GenLocated SrcSpanAnnA (Pat GhcRn),
      HsConDetails
        Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
     NameSet)
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return ( (GenLocated SrcSpanAnnA (Pat GhcRn)
    LPat GhcRn
    pat', [Void]
    -> [GenLocated SrcSpanAnnN Name]
    -> HsConDetails
         Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]
    forall tyarg arg rec.
    [tyarg] -> [arg] -> HsConDetails tyarg arg rec
    PrefixCon [Void]
    noTypeArgs [GenLocated SrcSpanAnnN Name]
    names)
                                   , [Name] -> NameSet
    mkFVs ((GenLocated SrcSpanAnnN Name -> Name)
    -> [GenLocated SrcSpanAnnN Name] -> [Name]
    forall a b. (a -> b) -> [a] -> [b]
    map GenLocated SrcSpanAnnN Name -> Name
    forall l e. GenLocated l e -> e
    unLoc [GenLocated SrcSpanAnnN Name]
    names)) }
                   InfixCon LIdP GhcPs
    var1 LIdP GhcPs
    var2 ->
                       do { [LocatedN RdrName] -> TcRn ()
    checkDupRdrNames [LocatedN RdrName
    LIdP GhcPs
    var1, LocatedN RdrName
    LIdP GhcPs
    var2]
                          ; GenLocated SrcSpanAnnN Name
    name1 <- LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall {ann}.
    GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupPatSynBndr LocatedN RdrName
    LIdP GhcPs
    var1
                          ; GenLocated SrcSpanAnnN Name
    name2 <- LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall {ann}.
    GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupPatSynBndr LocatedN RdrName
    LIdP GhcPs
    var2
                          -- ; checkPrecMatch -- TODO
                          ; ((GenLocated SrcSpanAnnA (Pat GhcRn),
      HsConDetails
        Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
     NameSet)
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return ( (GenLocated SrcSpanAnnA (Pat GhcRn)
    LPat GhcRn
    pat', GenLocated SrcSpanAnnN Name
    -> GenLocated SrcSpanAnnN Name
    -> HsConDetails
         Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]
    forall tyarg arg rec. arg -> arg -> HsConDetails tyarg arg rec
    InfixCon GenLocated SrcSpanAnnN Name
    name1 GenLocated SrcSpanAnnN Name
    name2)
                                   , [Name] -> NameSet
    mkFVs ((GenLocated SrcSpanAnnN Name -> Name)
    -> [GenLocated SrcSpanAnnN Name] -> [Name]
    forall a b. (a -> b) -> [a] -> [b]
    map GenLocated SrcSpanAnnN Name -> Name
    forall l e. GenLocated l e -> e
    unLoc [GenLocated SrcSpanAnnN Name
    name1, GenLocated SrcSpanAnnN Name
    name2])) }
                   RecCon [RecordPatSynField GhcPs]
    vars ->
                       do { [LocatedN RdrName] -> TcRn ()
    checkDupRdrNames ((RecordPatSynField GhcPs -> LocatedN RdrName)
    -> [RecordPatSynField GhcPs] -> [LocatedN RdrName]
    forall a b. (a -> b) -> [a] -> [b]
    map (FieldOcc GhcPs -> LocatedN RdrName
    forall pass. FieldOcc pass -> LocatedN RdrName
    rdrNameFieldOcc (FieldOcc GhcPs -> LocatedN RdrName)
    -> (RecordPatSynField GhcPs -> FieldOcc GhcPs)
    -> RecordPatSynField GhcPs
    -> LocatedN RdrName
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . RecordPatSynField GhcPs -> FieldOcc GhcPs
    forall pass. RecordPatSynField pass -> FieldOcc pass
    recordPatSynField) [RecordPatSynField GhcPs]
    vars)
                          ; [FieldLabel]
    fls <- Name -> RnM [FieldLabel]
    lookupConstructorFields Name
    name
                          ; let fld_env :: FastStringEnv FieldLabel
    fld_env = [(FastString, FieldLabel)] -> FastStringEnv FieldLabel
    forall a. [(FastString, a)] -> FastStringEnv a
    mkFsEnv [ (FieldLabel -> FastString
    flLabel FieldLabel
    fl, FieldLabel
    fl) | FieldLabel
    fl <- [FieldLabel]
    fls ]
                          ; let rnRecordPatSynField :: RecordPatSynField GhcPs
    -> IOEnv (Env TcGblEnv TcLclEnv) (RecordPatSynField GhcRn)
    rnRecordPatSynField
                                  (RecordPatSynField { recordPatSynField :: forall pass. RecordPatSynField pass -> FieldOcc pass
    recordPatSynField  = FieldOcc GhcPs
    visible
                                                     , recordPatSynPatVar :: forall pass. RecordPatSynField pass -> LIdP pass
    recordPatSynPatVar = LIdP GhcPs
    hidden })
                                  = do { let visible' :: FieldOcc GhcRn
    visible' = FastStringEnv FieldLabel -> FieldOcc GhcPs -> FieldOcc GhcRn
    lookupField FastStringEnv FieldLabel
    fld_env FieldOcc GhcPs
    visible
                                       ; GenLocated SrcSpanAnnN Name
    hidden'  <- LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall {ann}.
    GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupPatSynBndr LocatedN RdrName
    LIdP GhcPs
    hidden
                                       ; RecordPatSynField GhcRn
    -> IOEnv (Env TcGblEnv TcLclEnv) (RecordPatSynField GhcRn)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (RecordPatSynField GhcRn
     -> IOEnv (Env TcGblEnv TcLclEnv) (RecordPatSynField GhcRn))
    -> RecordPatSynField GhcRn
    -> IOEnv (Env TcGblEnv TcLclEnv) (RecordPatSynField GhcRn)
    forall a b. (a -> b) -> a -> b
    $ RecordPatSynField { recordPatSynField :: FieldOcc GhcRn
    recordPatSynField  = FieldOcc GhcRn
    visible'
                                                                    , recordPatSynPatVar :: LIdP GhcRn
    recordPatSynPatVar = GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    hidden' } }
                          ; [RecordPatSynField GhcRn]
    names <- (RecordPatSynField GhcPs
     -> IOEnv (Env TcGblEnv TcLclEnv) (RecordPatSynField GhcRn))
    -> [RecordPatSynField GhcPs]
    -> IOEnv (Env TcGblEnv TcLclEnv) [RecordPatSynField GhcRn]
    forall (t :: * -> *) (m :: * -> *) a b.
    (Traversable t, Monad m) =>
    (a -> m b) -> t a -> m (t b)
    mapM RecordPatSynField GhcPs
    -> IOEnv (Env TcGblEnv TcLclEnv) (RecordPatSynField GhcRn)
    rnRecordPatSynField  [RecordPatSynField GhcPs]
    vars
                          ; ((GenLocated SrcSpanAnnA (Pat GhcRn),
      HsConDetails
        Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
     NameSet)
    -> RnM
         ((GenLocated SrcSpanAnnA (Pat GhcRn),
           HsConDetails
             Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]),
          NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return ( (GenLocated SrcSpanAnnA (Pat GhcRn)
    LPat GhcRn
    pat', [RecordPatSynField GhcRn]
    -> HsConDetails
         Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]
    forall tyarg arg rec. rec -> HsConDetails tyarg arg rec
    RecCon [RecordPatSynField GhcRn]
    names)
                                   , [Name] -> NameSet
    mkFVs ((RecordPatSynField GhcRn -> Name)
    -> [RecordPatSynField GhcRn] -> [Name]
    forall a b. (a -> b) -> [a] -> [b]
    map (GenLocated SrcSpanAnnN Name -> Name
    forall l e. GenLocated l e -> e
    unLoc (GenLocated SrcSpanAnnN Name -> Name)
    -> (RecordPatSynField GhcRn -> GenLocated SrcSpanAnnN Name)
    -> RecordPatSynField GhcRn
    -> Name
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . RecordPatSynField GhcRn -> GenLocated SrcSpanAnnN Name
    forall pass. RecordPatSynField pass -> LIdP pass
    recordPatSynPatVar) [RecordPatSynField GhcRn]
    names)) }

            ; (HsPatSynDir GhcRn
    dir', NameSet
    fvs2) <- case HsPatSynDir GhcPs
    dir of
                HsPatSynDir GhcPs
    Unidirectional -> (HsPatSynDir GhcRn, NameSet)
    -> IOEnv (Env TcGblEnv TcLclEnv) (HsPatSynDir GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HsPatSynDir GhcRn
    forall id. HsPatSynDir id
    Unidirectional, NameSet
    emptyFVs)
                HsPatSynDir GhcPs
    ImplicitBidirectional -> (HsPatSynDir GhcRn, NameSet)
    -> IOEnv (Env TcGblEnv TcLclEnv) (HsPatSynDir GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (HsPatSynDir GhcRn
    forall id. HsPatSynDir id
    ImplicitBidirectional, NameSet
    emptyFVs)
                ExplicitBidirectional MatchGroup GhcPs (LHsExpr GhcPs)
    mg ->
                    do { (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    mg', NameSet
    fvs) <- [Name]
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    forall a. [Name] -> RnM (a, NameSet) -> RnM (a, NameSet)
    bindSigTyVarsFV [Name]
    scoped_tvs (RnM
       (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
     -> RnM
          (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)),
           NameSet))
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    forall a b. (a -> b) -> a -> b
    $
                                       HsMatchContext GhcRn
    -> (LocatedA (HsExpr GhcPs)
        -> IOEnv
             (Env TcGblEnv TcLclEnv)
             (GenLocated SrcSpanAnnA (HsExpr GhcRn), NameSet))
    -> MatchGroup GhcPs (LocatedA (HsExpr GhcPs))
    -> RnM
         (MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)), NameSet)
    forall (body :: * -> *).
    (Outputable (body GhcPs), AnnoBody body) =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> MatchGroup GhcPs (LocatedA (body GhcPs))
    -> RnM (MatchGroup GhcRn (LocatedA (body GhcRn)), NameSet)
    rnMatchGroup (LIdP GhcRn -> HsMatchContext GhcRn
    forall p. LIdP p -> HsMatchContext p
    mkPrefixFunRhs (SrcSpanAnnN -> Name -> GenLocated SrcSpanAnnN Name
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnN
    l Name
    name))
                                                    LocatedA (HsExpr GhcPs)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (GenLocated SrcSpanAnnA (HsExpr GhcRn), NameSet)
    LHsExpr GhcPs -> RnM (LHsExpr GhcRn, NameSet)
    rnLExpr MatchGroup GhcPs (LocatedA (HsExpr GhcPs))
    MatchGroup GhcPs (LHsExpr GhcPs)
    mg
                       ; (HsPatSynDir GhcRn, NameSet)
    -> IOEnv (Env TcGblEnv TcLclEnv) (HsPatSynDir GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (MatchGroup GhcRn (LHsExpr GhcRn) -> HsPatSynDir GhcRn
    forall id. MatchGroup id (LHsExpr id) -> HsPatSynDir id
    ExplicitBidirectional MatchGroup GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))
    MatchGroup GhcRn (LHsExpr GhcRn)
    mg', NameSet
    fvs) }

            ; Module
    mod <- IOEnv (Env TcGblEnv TcLclEnv) Module
    forall (m :: * -> *). HasModule m => m Module
    getModule
            ; let fvs :: NameSet
    fvs = NameSet
    fvs1 NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    fvs2
                  fvs' :: NameSet
    fvs' = (Name -> Bool) -> NameSet -> NameSet
    filterNameSet (Module -> Name -> Bool
    nameIsLocalOrFrom Module
    mod) NameSet
    fvs
                    -- Keep locally-defined Names
                    -- As well as dependency analysis, we need these for the
                    -- MonoLocalBinds test in GHC.Tc.Gen.Bind.decideGeneralisationPlan

                  bind' :: PatSynBind GhcRn GhcRn
    bind' = PatSynBind GhcRn GhcPs
    bind{ psb_args :: HsPatSynDetails GhcRn
    psb_args = HsConDetails
      Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]
    HsPatSynDetails GhcRn
    details'
                              , psb_def :: LPat GhcRn
    psb_def = GenLocated SrcSpanAnnA (Pat GhcRn)
    LPat GhcRn
    pat'
                              , psb_dir :: HsPatSynDir GhcRn
    psb_dir = HsPatSynDir GhcRn
    dir'
                              , psb_ext :: XPSB GhcRn GhcRn
    psb_ext = NameSet
    XPSB GhcRn GhcRn
    fvs' }
                  selector_names :: [Name]
    selector_names = case HsConDetails
      Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]
    details' of
                                     RecCon [RecordPatSynField GhcRn]
    names ->
                                      (RecordPatSynField GhcRn -> Name)
    -> [RecordPatSynField GhcRn] -> [Name]
    forall a b. (a -> b) -> [a] -> [b]
    map (FieldOcc GhcRn -> Name
    forall pass. FieldOcc pass -> XCFieldOcc pass
    extFieldOcc (FieldOcc GhcRn -> Name)
    -> (RecordPatSynField GhcRn -> FieldOcc GhcRn)
    -> RecordPatSynField GhcRn
    -> Name
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . RecordPatSynField GhcRn -> FieldOcc GhcRn
    forall pass. RecordPatSynField pass -> FieldOcc pass
    recordPatSynField) [RecordPatSynField GhcRn]
    names
                                     HsConDetails
      Void (GenLocated SrcSpanAnnN Name) [RecordPatSynField GhcRn]
    _ -> []

            ; NameSet
    fvs' NameSet
    -> RnM (PatSynBind GhcRn GhcRn, [Name], NameSet)
    -> RnM (PatSynBind GhcRn GhcRn, [Name], NameSet)
    `seq` -- See Note [Free-variable space leak]
              (PatSynBind GhcRn GhcRn, [Name], NameSet)
    -> RnM (PatSynBind GhcRn GhcRn, [Name], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (PatSynBind GhcRn GhcRn
    bind', Name
    name Name -> [Name] -> [Name]
    forall a. a -> [a] -> [a]
    : [Name]
    selector_names , NameSet
    fvs1)
              -- Why fvs1?  See Note [Pattern synonym builders don't yield dependencies]
          }
      where
        -- See Note [Renaming pattern synonym variables]
        lookupPatSynBndr :: GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupPatSynBndr = (RdrName -> TcM Name)
    -> GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    forall a b ann.
    (a -> TcM b)
    -> GenLocated (SrcSpanAnn' ann) a
    -> TcRn (GenLocated (SrcSpanAnn' ann) b)
    wrapLocMA RdrName -> TcM Name
    lookupLocalOccRn

        patternSynonymErr :: SDoc
        patternSynonymErr :: SDoc
    patternSynonymErr
          = SDoc -> Int -> SDoc -> SDoc
    hang (String -> SDoc
    text String
    "Illegal pattern synonym declaration")
               Int
    2 (String -> SDoc
    text String
    "Use -XPatternSynonyms to enable this extension")

    {-
    Note [Renaming pattern synonym variables]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    We rename pattern synonym declaractions backwards to normal to reuse
    the logic already implemented for renaming patterns.

    We first rename the RHS of a declaration which brings into
    scope the variables bound by the pattern (as they would be
    in normal function definitions). We then lookup the variables
    which we want to bind in this local environment.

    It is crucial that we then only lookup in the *local* environment which
    only contains the variables brought into scope by the pattern and nothing
    else. Amazingly no-one encountered this bug for 3 GHC versions but
    it was possible to define a pattern synonym which referenced global
    identifiers and worked correctly.

    ```
    x = 5

    pattern P :: Int -> ()
    pattern P x <- _

    f (P x) = x

    > f () = 5
    ```

    See #13470 for the original report.

    Note [Pattern synonym builders don't yield dependencies]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    When renaming a pattern synonym that has an explicit builder,
    references in the builder definition should not be used when
    calculating dependencies. For example, consider the following pattern
    synonym definition:

    pattern P x <- C1 x where
      P x = f (C1 x)

    f (P x) = C2 x

    In this case, 'P' needs to be typechecked in two passes:

    1. Typecheck the pattern definition of 'P', which fully determines the
       type of 'P'. This step doesn't require knowing anything about 'f',
       since the builder definition is not looked at.

    2. Typecheck the builder definition, which needs the typechecked
       definition of 'f' to be in scope; done by calls oo tcPatSynBuilderBind
       in GHC.Tc.Gen.Bind.tcValBinds.

    This behaviour is implemented in 'tcValBinds', but it crucially
    depends on 'P' not being put in a recursive group with 'f' (which
    would make it look like a recursive pattern synonym a la 'pattern P =
    P' which is unsound and rejected).

    So:
     * We do not include builder fvs in the Uses returned by rnPatSynBind
       (which is then used for dependency analysis)
     * But we /do/ include them in the psb_fvs for the PatSynBind
     * In rnValBinds we record these builder uses, to avoid bogus
       unused-variable warnings (#12548)
    -}

    {- *********************************************************************
    *                                                                      *
                    Class/instance method bindings
    *                                                                      *
    ********************************************************************* -}

    {- @rnMethodBinds@ is used for the method bindings of a class and an instance
    declaration.   Like @rnBinds@ but without dependency analysis.

    NOTA BENE: we record each {\em binder} of a method-bind group as a free variable.
    That's crucial when dealing with an instance decl:
    \begin{verbatim}
            instance Foo (T a) where
               op x = ...
    \end{verbatim}
    This might be the {\em sole} occurrence of @op@ for an imported class @Foo@,
    and unless @op@ occurs we won't treat the type signature of @op@ in the class
    decl for @Foo@ as a source of instance-decl gates.  But we should!  Indeed,
    in many ways the @op@ in an instance decl is just like an occurrence, not
    a binder.
    -}

    rnMethodBinds :: Bool                   -- True <=> is a class declaration
                  -> Name                   -- Class name
                  -> [Name]                 -- Type variables from the class/instance header
                  -> LHsBinds GhcPs         -- Binds
                  -> [LSig GhcPs]           -- and signatures/pragmas
                  -> RnM (LHsBinds GhcRn, [LSig GhcRn], FreeVars)
    -- Used for
    --   * the default method bindings in a class decl
    --   * the method bindings in an instance decl
    rnMethodBinds :: Bool
    -> Name
    -> [Name]
    -> LHsBindsLR GhcPs GhcPs
    -> [LSig GhcPs]
    -> RnM (LHsBinds GhcRn, [LSig GhcRn], NameSet)
    rnMethodBinds Bool
    is_cls_decl Name
    cls [Name]
    ktv_names LHsBindsLR GhcPs GhcPs
    binds [LSig GhcPs]
    sigs
      = do { [LocatedN RdrName] -> TcRn ()
    checkDupRdrNamesN (LHsBindsLR GhcPs GhcPs -> [LIdP GhcPs]
    forall idL idR. UnXRec idL => LHsBindsLR idL idR -> [LIdP idL]
    collectMethodBinders LHsBindsLR GhcPs GhcPs
    binds)
                 -- Check that the same method is not given twice in the
                 -- same instance decl      instance C T where
                 --                       f x = ...
                 --                       g y = ...
                 --                       f x = ...
                 -- We must use checkDupRdrNames because the Name of the
                 -- method is the Name of the class selector, whose SrcSpan
                 -- points to the class declaration; and we use rnMethodBinds
                 -- for instance decls too

           -- Rename the bindings LHSs
           ; Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    binds' <- (GenLocated SrcSpanAnnA (HsBindLR GhcPs GhcPs)
     -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
     -> IOEnv
          (Env TcGblEnv TcLclEnv)
          (Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))))
    -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcPs GhcPs))
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)))
    forall (t :: * -> *) (m :: * -> *) a b.
    (Foldable t, Monad m) =>
    (a -> b -> m b) -> b -> t a -> m b
    foldrM (Bool
    -> Name
    -> LHsBindLR GhcPs GhcPs
    -> LHsBindsLR GhcRn GhcPs
    -> RnM (LHsBindsLR GhcRn GhcPs)
    rnMethodBindLHS Bool
    is_cls_decl Name
    cls) Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    forall a. Bag a
    emptyBag Bag (GenLocated SrcSpanAnnA (HsBindLR GhcPs GhcPs))
    LHsBindsLR GhcPs GhcPs
    binds

           -- Rename the pragmas and signatures
           -- Annoyingly the type variables /are/ in scope for signatures, but
           -- /are not/ in scope in the SPECIALISE instance pramas; e.g.
           --    instance Eq a => Eq (T a) where
           --       (==) :: a -> a -> a
           --       {-# SPECIALISE instance Eq a => Eq (T [a]) #-}
           ; let ([LSig GhcPs]
    spec_inst_prags, [LSig GhcPs]
    other_sigs) = (LSig GhcPs -> Bool)
    -> [LSig GhcPs] -> ([LSig GhcPs], [LSig GhcPs])
    forall a. (a -> Bool) -> [a] -> ([a], [a])
    partition LSig GhcPs -> Bool
    forall p. UnXRec p => LSig p -> Bool
    isSpecInstLSig [LSig GhcPs]
    sigs
                 bound_nms :: NameSet
    bound_nms = [Name] -> NameSet
    mkNameSet (CollectFlag GhcRn -> LHsBindsLR GhcRn GhcPs -> [IdP GhcRn]
    forall p idR.
    CollectPass p =>
    CollectFlag p -> LHsBindsLR p idR -> [IdP p]
    collectHsBindsBinders CollectFlag GhcRn
    forall p. CollectFlag p
    CollNoDictBinders Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    LHsBindsLR GhcRn GhcPs
    binds')
                 sig_ctxt :: HsSigCtxt
    sig_ctxt | Bool
    is_cls_decl = Name -> HsSigCtxt
    ClsDeclCtxt Name
    cls
                          | Bool
    otherwise   = NameSet -> HsSigCtxt
    InstDeclCtxt NameSet
    bound_nms
           ; ([GenLocated SrcSpanAnnA (Sig GhcRn)]
    spec_inst_prags', NameSet
    sip_fvs) <- HsSigCtxt -> [LSig GhcPs] -> RnM ([LSig GhcRn], NameSet)
    renameSigs HsSigCtxt
    sig_ctxt [LSig GhcPs]
    spec_inst_prags
           ; ([GenLocated SrcSpanAnnA (Sig GhcRn)]
    other_sigs',      NameSet
    sig_fvs) <- [Name]
    -> RnM ([LSig GhcRn], NameSet) -> RnM ([LSig GhcRn], NameSet)
    forall a. [Name] -> RnM (a, NameSet) -> RnM (a, NameSet)
    bindLocalNamesFV [Name]
    ktv_names (RnM ([LSig GhcRn], NameSet) -> RnM ([LSig GhcRn], NameSet))
    -> RnM ([LSig GhcRn], NameSet) -> RnM ([LSig GhcRn], NameSet)
    forall a b. (a -> b) -> a -> b
    $
                                            HsSigCtxt -> [LSig GhcPs] -> RnM ([LSig GhcRn], NameSet)
    renameSigs HsSigCtxt
    sig_ctxt [LSig GhcPs]
    other_sigs

           -- Rename the bindings RHSs.  Again there's an issue about whether the
           -- type variables from the class/instance head are in scope.
           -- Answer no in Haskell 2010, but yes if you have -XScopedTypeVariables
           ; (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn))
    binds'', NameSet
    bind_fvs) <- [Name]
    -> RnM (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet)
    -> RnM (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet)
    forall a. [Name] -> RnM (a, NameSet) -> RnM (a, NameSet)
    bindSigTyVarsFV [Name]
    ktv_names (RnM (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet)
     -> RnM (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet))
    -> RnM (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet)
    -> RnM (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet)
    forall a b. (a -> b) -> a -> b
    $
                  do { Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    binds_w_dus <- (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)
     -> IOEnv
          (Env TcGblEnv TcLclEnv)
          (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet))
    -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet))
    forall (m :: * -> *) a b.
    Monad m =>
    (a -> m b) -> Bag a -> m (Bag b)
    mapBagM ((Name -> [Name])
    -> LHsBindLR GhcRn GhcPs -> RnM (LHsBind GhcRn, [Name], NameSet)
    rnLBind ([LSig GhcRn] -> Name -> [Name]
    mkScopedTvFn [GenLocated SrcSpanAnnA (Sig GhcRn)]
    [LSig GhcRn]
    other_sigs')) Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    binds'
                     ; let bind_fvs :: NameSet
    bind_fvs = ((GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
     -> NameSet -> NameSet)
    -> NameSet
    -> Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    -> NameSet
    forall (t :: * -> *) a b.
    Foldable t =>
    (a -> b -> b) -> b -> t a -> b
    foldr (\(GenLocated SrcSpanAnnA (HsBind GhcRn)
    _,[Name]
    _,NameSet
    fv1) NameSet
    fv2 -> NameSet
    fv1 NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    fv2)
                                               NameSet
    emptyFVs Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    binds_w_dus
                     ; (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet)
    -> RnM (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)), NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (((GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
     -> GenLocated SrcSpanAnnA (HsBind GhcRn))
    -> Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    -> Bag (GenLocated SrcSpanAnnA (HsBind GhcRn))
    forall a b. (a -> b) -> Bag a -> Bag b
    mapBag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    -> GenLocated SrcSpanAnnA (HsBind GhcRn)
    forall a b c. (a, b, c) -> a
    fstOf3 Bag (GenLocated SrcSpanAnnA (HsBind GhcRn), [Name], NameSet)
    binds_w_dus, NameSet
    bind_fvs) }

           ; (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)),
     [GenLocated SrcSpanAnnA (Sig GhcRn)], NameSet)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (Bag (GenLocated SrcSpanAnnA (HsBind GhcRn)),
          [GenLocated SrcSpanAnnA (Sig GhcRn)], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return ( Bag (GenLocated SrcSpanAnnA (HsBind GhcRn))
    binds'', [GenLocated SrcSpanAnnA (Sig GhcRn)]
    spec_inst_prags' [GenLocated SrcSpanAnnA (Sig GhcRn)]
    -> [GenLocated SrcSpanAnnA (Sig GhcRn)]
    -> [GenLocated SrcSpanAnnA (Sig GhcRn)]
    forall a. [a] -> [a] -> [a]
    ++ [GenLocated SrcSpanAnnA (Sig GhcRn)]
    other_sigs'
                    , NameSet
    sig_fvs NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    sip_fvs NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    bind_fvs) }

    rnMethodBindLHS :: Bool -> Name
                    -> LHsBindLR GhcPs GhcPs
                    -> LHsBindsLR GhcRn GhcPs
                    -> RnM (LHsBindsLR GhcRn GhcPs)
    rnMethodBindLHS :: Bool
    -> Name
    -> LHsBindLR GhcPs GhcPs
    -> LHsBindsLR GhcRn GhcPs
    -> RnM (LHsBindsLR GhcRn GhcPs)
    rnMethodBindLHS Bool
    _ Name
    cls (L SrcSpanAnnA
    loc bind :: HsBindLR GhcPs GhcPs
    bind@(FunBind { fun_id :: forall idL idR. HsBindLR idL idR -> LIdP idL
    fun_id = LIdP GhcPs
    name })) LHsBindsLR GhcRn GhcPs
    rest
      = SrcSpanAnnA
    -> RnM (LHsBindsLR GhcRn GhcPs) -> RnM (LHsBindsLR GhcRn GhcPs)
    forall ann a. SrcSpanAnn' ann -> TcRn a -> TcRn a
    setSrcSpanA SrcSpanAnnA
    loc (RnM (LHsBindsLR GhcRn GhcPs) -> RnM (LHsBindsLR GhcRn GhcPs))
    -> RnM (LHsBindsLR GhcRn GhcPs) -> RnM (LHsBindsLR GhcRn GhcPs)
    forall a b. (a -> b) -> a -> b
    $ do
        do { GenLocated SrcSpanAnnN Name
    sel_name <- (RdrName -> TcM Name)
    -> LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall a b ann.
    (a -> TcM b)
    -> GenLocated (SrcSpanAnn' ann) a
    -> TcRn (GenLocated (SrcSpanAnn' ann) b)
    wrapLocMA (Name -> SDoc -> RdrName -> TcM Name
    lookupInstDeclBndr Name
    cls (String -> SDoc
    text String
    "method")) LocatedN RdrName
    LIdP GhcPs
    name
                         -- We use the selector name as the binder
           ; let bind' :: HsBindLR GhcRn GhcPs
    bind' = HsBindLR GhcPs GhcPs
    bind { fun_id :: LIdP GhcRn
    fun_id = GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    sel_name, fun_ext :: XFunBind GhcRn GhcPs
    fun_ext = NoExtField
    XFunBind GhcRn GhcPs
    noExtField }
           ; Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)))
    forall (m :: * -> *) a. Monad m => a -> m a
    return (SrcSpanAnnA
    -> HsBindLR GhcRn GhcPs
    -> GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnA
    loc HsBindLR GhcRn GhcPs
    bind' GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)
    -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    -> Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    forall a. a -> Bag a -> Bag a
    `consBag` Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    LHsBindsLR GhcRn GhcPs
    rest ) }

    -- Report error for all other forms of bindings
    -- This is why we use a fold rather than map
    rnMethodBindLHS Bool
    is_cls_decl Name
    _ (L SrcSpanAnnA
    loc HsBindLR GhcPs GhcPs
    bind) LHsBindsLR GhcRn GhcPs
    rest
      = do { SrcSpan -> SDoc -> TcRn ()
    addErrAt (SrcSpanAnnA -> SrcSpan
    forall a. SrcSpanAnn' a -> SrcSpan
    locA SrcSpanAnnA
    loc) (SDoc -> TcRn ()) -> SDoc -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
             [SDoc] -> SDoc
    vcat [ SDoc
    what SDoc -> SDoc -> SDoc
    <+> String -> SDoc
    text String
    "not allowed in" SDoc -> SDoc -> SDoc
    <+> SDoc
    decl_sort
                  , Int -> SDoc -> SDoc
    nest Int
    2 (HsBindLR GhcPs GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsBindLR GhcPs GhcPs
    bind) ]
           ; Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)))
    forall (m :: * -> *) a. Monad m => a -> m a
    return Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    LHsBindsLR GhcRn GhcPs
    rest }
      where
        decl_sort :: SDoc
    decl_sort | Bool
    is_cls_decl = String -> SDoc
    text String
    "class declaration:"
                  | Bool
    otherwise   = String -> SDoc
    text String
    "instance declaration:"
        what :: SDoc
    what = case HsBindLR GhcPs GhcPs
    bind of
                  PatBind {}    -> String -> SDoc
    text String
    "Pattern bindings (except simple variables)"
                  PatSynBind {} -> String -> SDoc
    text String
    "Pattern synonyms"
                                   -- Associated pattern synonyms are not implemented yet
                  HsBindLR GhcPs GhcPs
    _ -> String -> SDoc -> SDoc
    forall a. HasCallStack => String -> SDoc -> a
    pprPanic String
    "rnMethodBind" (HsBindLR GhcPs GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsBindLR GhcPs GhcPs
    bind)

    {-
    ************************************************************************
    *                                                                      *
    \subsubsection[dep-Sigs]{Signatures (and user-pragmas for values)}
    *                                                                      *
    ************************************************************************

    @renameSigs@ checks for:
    \begin{enumerate}
    \item more than one sig for one thing;
    \item signatures given for things not bound here;
    \end{enumerate}

    At the moment we don't gather free-var info from the types in
    signatures.  We'd only need this if we wanted to report unused tyvars.
    -}

    renameSigs :: HsSigCtxt
               -> [LSig GhcPs]
               -> RnM ([LSig GhcRn], FreeVars)
    -- Renames the signatures and performs error checks
    renameSigs :: HsSigCtxt -> [LSig GhcPs] -> RnM ([LSig GhcRn], NameSet)
    renameSigs HsSigCtxt
    ctxt [LSig GhcPs]
    sigs
      = do  { (NonEmpty (LocatedN RdrName, Sig GhcPs) -> TcRn ())
    -> [NonEmpty (LocatedN RdrName, Sig GhcPs)] -> TcRn ()
    forall (t :: * -> *) (m :: * -> *) a b.
    (Foldable t, Monad m) =>
    (a -> m b) -> t a -> m ()
    mapM_ NonEmpty (LocatedN RdrName, Sig GhcPs) -> TcRn ()
    dupSigDeclErr ([LSig GhcPs] -> [NonEmpty (LocatedN RdrName, Sig GhcPs)]
    findDupSigs [LSig GhcPs]
    sigs)

            ; [LSig GhcPs] -> TcRn ()
    checkDupMinimalSigs [LSig GhcPs]
    sigs

            ; ([GenLocated SrcSpanAnnA (Sig GhcRn)]
    sigs', NameSet
    sig_fvs) <- (GenLocated SrcSpanAnnA (Sig GhcPs)
     -> RnM (GenLocated SrcSpanAnnA (Sig GhcRn), NameSet))
    -> [GenLocated SrcSpanAnnA (Sig GhcPs)]
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         ([GenLocated SrcSpanAnnA (Sig GhcRn)], NameSet)
    forall a b. (a -> RnM (b, NameSet)) -> [a] -> RnM ([b], NameSet)
    mapFvRn ((Sig GhcPs -> TcM (Sig GhcRn, NameSet))
    -> GenLocated SrcSpanAnnA (Sig GhcPs)
    -> RnM (GenLocated SrcSpanAnnA (Sig GhcRn), NameSet)
    forall a b c.
    (a -> TcM (b, c)) -> LocatedA a -> TcM (LocatedA b, c)
    wrapLocFstMA (HsSigCtxt -> Sig GhcPs -> TcM (Sig GhcRn, NameSet)
    renameSig HsSigCtxt
    ctxt)) [GenLocated SrcSpanAnnA (Sig GhcPs)]
    [LSig GhcPs]
    sigs

            ; let ([GenLocated SrcSpanAnnA (Sig GhcRn)]
    good_sigs, [GenLocated SrcSpanAnnA (Sig GhcRn)]
    bad_sigs) = (GenLocated SrcSpanAnnA (Sig GhcRn) -> Bool)
    -> [GenLocated SrcSpanAnnA (Sig GhcRn)]
    -> ([GenLocated SrcSpanAnnA (Sig GhcRn)],
        [GenLocated SrcSpanAnnA (Sig GhcRn)])
    forall a. (a -> Bool) -> [a] -> ([a], [a])
    partition (HsSigCtxt -> LSig GhcRn -> Bool
    forall (a :: Pass). HsSigCtxt -> LSig (GhcPass a) -> Bool
    okHsSig HsSigCtxt
    ctxt) [GenLocated SrcSpanAnnA (Sig GhcRn)]
    sigs'
            ; (GenLocated SrcSpanAnnA (Sig GhcRn) -> TcRn ())
    -> [GenLocated SrcSpanAnnA (Sig GhcRn)] -> TcRn ()
    forall (t :: * -> *) (m :: * -> *) a b.
    (Foldable t, Monad m) =>
    (a -> m b) -> t a -> m ()
    mapM_ GenLocated SrcSpanAnnA (Sig GhcRn) -> TcRn ()
    LSig GhcRn -> TcRn ()
    misplacedSigErr [GenLocated SrcSpanAnnA (Sig GhcRn)]
    bad_sigs                 -- Misplaced

            ; ([GenLocated SrcSpanAnnA (Sig GhcRn)], NameSet)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         ([GenLocated SrcSpanAnnA (Sig GhcRn)], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return ([GenLocated SrcSpanAnnA (Sig GhcRn)]
    good_sigs, NameSet
    sig_fvs) }

    ----------------------
    -- We use lookupSigOccRn in the signatures, which is a little bit unsatisfactory
    -- because this won't work for:
    --      instance Foo T where
    --        {-# INLINE op #-}
    --        Baz.op = ...
    -- We'll just rename the INLINE prag to refer to whatever other 'op'
    -- is in scope.  (I'm assuming that Baz.op isn't in scope unqualified.)
    -- Doesn't seem worth much trouble to sort this.

    renameSig :: HsSigCtxt -> Sig GhcPs -> RnM (Sig GhcRn, FreeVars)
    renameSig :: HsSigCtxt -> Sig GhcPs -> TcM (Sig GhcRn, NameSet)
    renameSig HsSigCtxt
    _ (IdSig XIdSig GhcPs
    _ Id
    x)
      = (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XIdSig GhcRn -> Id -> Sig GhcRn
    forall pass. XIdSig pass -> Id -> Sig pass
    IdSig NoExtField
    XIdSig GhcRn
    noExtField Id
    x, NameSet
    emptyFVs)    -- Actually this never occurs

    renameSig HsSigCtxt
    ctxt sig :: Sig GhcPs
    sig@(TypeSig XTypeSig GhcPs
    _ [LIdP GhcPs]
    vs LHsSigWcType GhcPs
    ty)
      = do  { [GenLocated SrcSpanAnnN Name]
    new_vs <- (LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name))
    -> [LocatedN RdrName]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall (t :: * -> *) (m :: * -> *) a b.
    (Traversable t, Monad m) =>
    (a -> m b) -> t a -> m (t b)
    mapM (HsSigCtxt
    -> Sig GhcPs
    -> LocatedN RdrName
    -> RnM (GenLocated SrcSpanAnnN Name)
    lookupSigOccRnN HsSigCtxt
    ctxt Sig GhcPs
    sig) [LocatedN RdrName]
    [LIdP GhcPs]
    vs
            ; let doc :: HsDocContext
    doc = SDoc -> HsDocContext
    TypeSigCtx ([LocatedN RdrName] -> SDoc
    ppr_sig_bndrs [LocatedN RdrName]
    [LIdP GhcPs]
    vs)
            ; (HsWildCardBndrs GhcRn (GenLocated SrcSpanAnnA (HsSigType GhcRn))
    new_ty, NameSet
    fvs) <- HsDocContext
    -> LHsSigWcType GhcPs -> RnM (LHsSigWcType GhcRn, NameSet)
    rnHsSigWcType HsDocContext
    doc LHsSigWcType GhcPs
    ty
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XTypeSig GhcRn -> [LIdP GhcRn] -> LHsSigWcType GhcRn -> Sig GhcRn
    forall pass.
    XTypeSig pass -> [LIdP pass] -> LHsSigWcType pass -> Sig pass
    TypeSig XTypeSig GhcRn
    forall a. EpAnn a
    noAnn [GenLocated SrcSpanAnnN Name]
    [LIdP GhcRn]
    new_vs HsWildCardBndrs GhcRn (GenLocated SrcSpanAnnA (HsSigType GhcRn))
    LHsSigWcType GhcRn
    new_ty, NameSet
    fvs) }

    renameSig HsSigCtxt
    ctxt sig :: Sig GhcPs
    sig@(ClassOpSig XClassOpSig GhcPs
    _ Bool
    is_deflt [LIdP GhcPs]
    vs LHsSigType GhcPs
    ty)
      = do  { Bool
    defaultSigs_on <- Extension -> TcRnIf TcGblEnv TcLclEnv Bool
    forall gbl lcl. Extension -> TcRnIf gbl lcl Bool
    xoptM Extension
    LangExt.DefaultSignatures
            ; Bool -> TcRn () -> TcRn ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when (Bool
    is_deflt Bool -> Bool -> Bool
    && Bool -> Bool
    not Bool
    defaultSigs_on) (TcRn () -> TcRn ()) -> TcRn () -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
              SDoc -> TcRn ()
    addErr (Sig GhcPs -> SDoc
    defaultSigErr Sig GhcPs
    sig)
            ; [GenLocated SrcSpanAnnN Name]
    new_v <- (LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name))
    -> [LocatedN RdrName]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall (t :: * -> *) (m :: * -> *) a b.
    (Traversable t, Monad m) =>
    (a -> m b) -> t a -> m (t b)
    mapM (HsSigCtxt
    -> Sig GhcPs
    -> LocatedN RdrName
    -> RnM (GenLocated SrcSpanAnnN Name)
    lookupSigOccRnN HsSigCtxt
    ctxt Sig GhcPs
    sig) [LocatedN RdrName]
    [LIdP GhcPs]
    vs
            ; (GenLocated SrcSpanAnnA (HsSigType GhcRn)
    new_ty, NameSet
    fvs) <- HsDocContext
    -> TypeOrKind
    -> LHsSigType GhcPs
    -> RnM (LHsSigType GhcRn, NameSet)
    rnHsSigType HsDocContext
    ty_ctxt TypeOrKind
    TypeLevel LHsSigType GhcPs
    ty
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XClassOpSig GhcRn
    -> Bool -> [LIdP GhcRn] -> LHsSigType GhcRn -> Sig GhcRn
    forall pass.
    XClassOpSig pass
    -> Bool -> [LIdP pass] -> LHsSigType pass -> Sig pass
    ClassOpSig XClassOpSig GhcRn
    forall a. EpAnn a
    noAnn Bool
    is_deflt [GenLocated SrcSpanAnnN Name]
    [LIdP GhcRn]
    new_v GenLocated SrcSpanAnnA (HsSigType GhcRn)
    LHsSigType GhcRn
    new_ty, NameSet
    fvs) }
      where
        (LIdP GhcPs
    v1:[LIdP GhcPs]
    _) = [LIdP GhcPs]
    vs
        ty_ctxt :: HsDocContext
    ty_ctxt = SDoc -> HsDocContext
    GenericCtx (String -> SDoc
    text String
    "a class method signature for"
                              SDoc -> SDoc -> SDoc
    <+> SDoc -> SDoc
    quotes (LocatedN RdrName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr LocatedN RdrName
    LIdP GhcPs
    v1))

    renameSig HsSigCtxt
    _ (SpecInstSig XSpecInstSig GhcPs
    _ SourceText
    src LHsSigType GhcPs
    ty)
      = do  { HsDocContext -> Maybe SDoc -> LHsSigType GhcPs -> TcRn ()
    checkInferredVars HsDocContext
    doc Maybe SDoc
    inf_msg LHsSigType GhcPs
    ty
            ; (GenLocated SrcSpanAnnA (HsSigType GhcRn)
    new_ty, NameSet
    fvs) <- HsDocContext
    -> TypeOrKind
    -> LHsSigType GhcPs
    -> RnM (LHsSigType GhcRn, NameSet)
    rnHsSigType HsDocContext
    doc TypeOrKind
    TypeLevel LHsSigType GhcPs
    ty
              -- Check if there are any nested `forall`s or contexts, which are
              -- illegal in the type of an instance declaration (see
              -- Note [No nested foralls or contexts in instance types] in
              -- GHC.Hs.Type).
            ; HsDocContext -> SDoc -> LHsType GhcRn -> TcRn ()
    addNoNestedForallsContextsErr HsDocContext
    doc (String -> SDoc
    text String
    "SPECIALISE instance type")
                (LHsSigType GhcRn -> LHsType GhcRn
    forall (p :: Pass). LHsSigType (GhcPass p) -> LHsType (GhcPass p)
    getLHsInstDeclHead GenLocated SrcSpanAnnA (HsSigType GhcRn)
    LHsSigType GhcRn
    new_ty)
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XSpecInstSig GhcRn -> SourceText -> LHsSigType GhcRn -> Sig GhcRn
    forall pass.
    XSpecInstSig pass -> SourceText -> LHsSigType pass -> Sig pass
    SpecInstSig XSpecInstSig GhcRn
    forall a. EpAnn a
    noAnn SourceText
    src GenLocated SrcSpanAnnA (HsSigType GhcRn)
    LHsSigType GhcRn
    new_ty,NameSet
    fvs) }
      where
        doc :: HsDocContext
    doc = HsDocContext
    SpecInstSigCtx
        inf_msg :: Maybe SDoc
    inf_msg = SDoc -> Maybe SDoc
    forall a. a -> Maybe a
    Just (String -> SDoc
    text String
    "Inferred type variables are not allowed")

    -- {-# SPECIALISE #-} pragmas can refer to imported Ids
    -- so, in the top-level case (when mb_names is Nothing)
    -- we use lookupOccRn.  If there's both an imported and a local 'f'
    -- then the SPECIALISE pragma is ambiguous, unlike all other signatures
    renameSig HsSigCtxt
    ctxt sig :: Sig GhcPs
    sig@(SpecSig XSpecSig GhcPs
    _ LIdP GhcPs
    v [LHsSigType GhcPs]
    tys InlinePragma
    inl)
      = do  { GenLocated SrcSpanAnnN Name
    new_v <- case HsSigCtxt
    ctxt of
                         TopSigCtxt {} -> LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall {ann}.
    GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupLocatedOccRn LocatedN RdrName
    LIdP GhcPs
    v
                         HsSigCtxt
    _             -> HsSigCtxt
    -> Sig GhcPs
    -> LocatedN RdrName
    -> RnM (GenLocated SrcSpanAnnN Name)
    lookupSigOccRnN HsSigCtxt
    ctxt Sig GhcPs
    sig LocatedN RdrName
    LIdP GhcPs
    v
            ; ([GenLocated SrcSpanAnnA (HsSigType GhcRn)]
    new_ty, NameSet
    fvs) <- (([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
     -> GenLocated SrcSpanAnnA (HsSigType GhcPs)
     -> IOEnv
          (Env TcGblEnv TcLclEnv)
          ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet))
    -> ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    -> [GenLocated SrcSpanAnnA (HsSigType GhcPs)]
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    forall (t :: * -> *) (m :: * -> *) b a.
    (Foldable t, Monad m) =>
    (b -> a -> m b) -> b -> t a -> m b
    foldM ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    -> GenLocated SrcSpanAnnA (HsSigType GhcPs)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    do_one ([],NameSet
    emptyFVs) [GenLocated SrcSpanAnnA (HsSigType GhcPs)]
    [LHsSigType GhcPs]
    tys
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XSpecSig GhcRn
    -> LIdP GhcRn -> [LHsSigType GhcRn] -> InlinePragma -> Sig GhcRn
    forall pass.
    XSpecSig pass
    -> LIdP pass -> [LHsSigType pass] -> InlinePragma -> Sig pass
    SpecSig XSpecSig GhcRn
    forall a. EpAnn a
    noAnn GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    new_v [GenLocated SrcSpanAnnA (HsSigType GhcRn)]
    [LHsSigType GhcRn]
    new_ty InlinePragma
    inl, NameSet
    fvs) }
      where
        ty_ctxt :: HsDocContext
    ty_ctxt = SDoc -> HsDocContext
    GenericCtx (String -> SDoc
    text String
    "a SPECIALISE signature for"
                              SDoc -> SDoc -> SDoc
    <+> SDoc -> SDoc
    quotes (LocatedN RdrName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr LocatedN RdrName
    LIdP GhcPs
    v))
        do_one :: ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    -> GenLocated SrcSpanAnnA (HsSigType GhcPs)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    do_one ([GenLocated SrcSpanAnnA (HsSigType GhcRn)]
    tys,NameSet
    fvs) GenLocated SrcSpanAnnA (HsSigType GhcPs)
    ty
          = do { (GenLocated SrcSpanAnnA (HsSigType GhcRn)
    new_ty, NameSet
    fvs_ty) <- HsDocContext
    -> TypeOrKind
    -> LHsSigType GhcPs
    -> RnM (LHsSigType GhcRn, NameSet)
    rnHsSigType HsDocContext
    ty_ctxt TypeOrKind
    TypeLevel GenLocated SrcSpanAnnA (HsSigType GhcPs)
    LHsSigType GhcPs
    ty
               ; ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         ([GenLocated SrcSpanAnnA (HsSigType GhcRn)], NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return ( GenLocated SrcSpanAnnA (HsSigType GhcRn)
    new_tyGenLocated SrcSpanAnnA (HsSigType GhcRn)
    -> [GenLocated SrcSpanAnnA (HsSigType GhcRn)]
    -> [GenLocated SrcSpanAnnA (HsSigType GhcRn)]
    forall a. a -> [a] -> [a]
    :[GenLocated SrcSpanAnnA (HsSigType GhcRn)]
    tys, NameSet
    fvs_ty NameSet -> NameSet -> NameSet
    `plusFV` NameSet
    fvs) }

    renameSig HsSigCtxt
    ctxt sig :: Sig GhcPs
    sig@(InlineSig XInlineSig GhcPs
    _ LIdP GhcPs
    v InlinePragma
    s)
      = do  { GenLocated SrcSpanAnnN Name
    new_v <- HsSigCtxt
    -> Sig GhcPs
    -> LocatedN RdrName
    -> RnM (GenLocated SrcSpanAnnN Name)
    lookupSigOccRnN HsSigCtxt
    ctxt Sig GhcPs
    sig LocatedN RdrName
    LIdP GhcPs
    v
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XInlineSig GhcRn -> LIdP GhcRn -> InlinePragma -> Sig GhcRn
    forall pass.
    XInlineSig pass -> LIdP pass -> InlinePragma -> Sig pass
    InlineSig XInlineSig GhcRn
    forall a. EpAnn a
    noAnn GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    new_v InlinePragma
    s, NameSet
    emptyFVs) }

    renameSig HsSigCtxt
    ctxt (FixSig XFixSig GhcPs
    _ FixitySig GhcPs
    fsig)
      = do  { FixitySig GhcRn
    new_fsig <- HsSigCtxt -> FixitySig GhcPs -> RnM (FixitySig GhcRn)
    rnSrcFixityDecl HsSigCtxt
    ctxt FixitySig GhcPs
    fsig
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XFixSig GhcRn -> FixitySig GhcRn -> Sig GhcRn
    forall pass. XFixSig pass -> FixitySig pass -> Sig pass
    FixSig XFixSig GhcRn
    forall a. EpAnn a
    noAnn FixitySig GhcRn
    new_fsig, NameSet
    emptyFVs) }

    renameSig HsSigCtxt
    ctxt sig :: Sig GhcPs
    sig@(MinimalSig XMinimalSig GhcPs
    _ SourceText
    s (L SrcSpanAnnL
    l BooleanFormula (LIdP GhcPs)
    bf))
      = do BooleanFormula (GenLocated SrcSpanAnnN Name)
    new_bf <- (LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name))
    -> BooleanFormula (LocatedN RdrName)
    -> IOEnv
         (Env TcGblEnv TcLclEnv)
         (BooleanFormula (GenLocated SrcSpanAnnN Name))
    forall (t :: * -> *) (f :: * -> *) a b.
    (Traversable t, Applicative f) =>
    (a -> f b) -> t a -> f (t b)
    traverse (HsSigCtxt
    -> Sig GhcPs
    -> LocatedN RdrName
    -> RnM (GenLocated SrcSpanAnnN Name)
    lookupSigOccRnN HsSigCtxt
    ctxt Sig GhcPs
    sig) BooleanFormula (LocatedN RdrName)
    BooleanFormula (LIdP GhcPs)
    bf
           (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XMinimalSig GhcRn
    -> SourceText -> LBooleanFormula (LIdP GhcRn) -> Sig GhcRn
    forall pass.
    XMinimalSig pass
    -> SourceText -> LBooleanFormula (LIdP pass) -> Sig pass
    MinimalSig XMinimalSig GhcRn
    forall a. EpAnn a
    noAnn SourceText
    s (SrcSpanAnnL
    -> BooleanFormula (GenLocated SrcSpanAnnN Name)
    -> GenLocated
         SrcSpanAnnL (BooleanFormula (GenLocated SrcSpanAnnN Name))
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnL
    l BooleanFormula (GenLocated SrcSpanAnnN Name)
    new_bf), NameSet
    emptyFVs)

    renameSig HsSigCtxt
    ctxt sig :: Sig GhcPs
    sig@(PatSynSig XPatSynSig GhcPs
    _ [LIdP GhcPs]
    vs LHsSigType GhcPs
    ty)
      = do  { [GenLocated SrcSpanAnnN Name]
    new_vs <- (LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name))
    -> [LocatedN RdrName]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall (t :: * -> *) (m :: * -> *) a b.
    (Traversable t, Monad m) =>
    (a -> m b) -> t a -> m (t b)
    mapM (HsSigCtxt
    -> Sig GhcPs
    -> LocatedN RdrName
    -> RnM (GenLocated SrcSpanAnnN Name)
    lookupSigOccRnN HsSigCtxt
    ctxt Sig GhcPs
    sig) [LocatedN RdrName]
    [LIdP GhcPs]
    vs
            ; (GenLocated SrcSpanAnnA (HsSigType GhcRn)
    ty', NameSet
    fvs) <- HsDocContext
    -> TypeOrKind
    -> LHsSigType GhcPs
    -> RnM (LHsSigType GhcRn, NameSet)
    rnHsSigType HsDocContext
    ty_ctxt TypeOrKind
    TypeLevel LHsSigType GhcPs
    ty
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XPatSynSig GhcRn -> [LIdP GhcRn] -> LHsSigType GhcRn -> Sig GhcRn
    forall pass.
    XPatSynSig pass -> [LIdP pass] -> LHsSigType pass -> Sig pass
    PatSynSig XPatSynSig GhcRn
    forall a. EpAnn a
    noAnn [GenLocated SrcSpanAnnN Name]
    [LIdP GhcRn]
    new_vs GenLocated SrcSpanAnnA (HsSigType GhcRn)
    LHsSigType GhcRn
    ty', NameSet
    fvs) }
      where
        ty_ctxt :: HsDocContext
    ty_ctxt = SDoc -> HsDocContext
    GenericCtx (String -> SDoc
    text String
    "a pattern synonym signature for"
                              SDoc -> SDoc -> SDoc
    <+> [LocatedN RdrName] -> SDoc
    ppr_sig_bndrs [LocatedN RdrName]
    [LIdP GhcPs]
    vs)

    renameSig HsSigCtxt
    ctxt sig :: Sig GhcPs
    sig@(SCCFunSig XSCCFunSig GhcPs
    _ SourceText
    st LIdP GhcPs
    v Maybe (XRec GhcPs StringLiteral)
    s)
      = do  { GenLocated SrcSpanAnnN Name
    new_v <- HsSigCtxt
    -> Sig GhcPs
    -> LocatedN RdrName
    -> RnM (GenLocated SrcSpanAnnN Name)
    lookupSigOccRnN HsSigCtxt
    ctxt Sig GhcPs
    sig LocatedN RdrName
    LIdP GhcPs
    v
            ; (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XSCCFunSig GhcRn
    -> SourceText
    -> LIdP GhcRn
    -> Maybe (XRec GhcRn StringLiteral)
    -> Sig GhcRn
    forall pass.
    XSCCFunSig pass
    -> SourceText
    -> LIdP pass
    -> Maybe (XRec pass StringLiteral)
    -> Sig pass
    SCCFunSig XSCCFunSig GhcRn
    forall a. EpAnn a
    noAnn SourceText
    st GenLocated SrcSpanAnnN Name
    LIdP GhcRn
    new_v Maybe (XRec GhcPs StringLiteral)
    Maybe (XRec GhcRn StringLiteral)
    s, NameSet
    emptyFVs) }

    -- COMPLETE Sigs can refer to imported IDs which is why we use
    -- lookupLocatedOccRn rather than lookupSigOccRn
    renameSig HsSigCtxt
    _ctxt sig :: Sig GhcPs
    sig@(CompleteMatchSig XCompleteMatchSig GhcPs
    _ SourceText
    s (L SrcSpan
    l [LocatedN RdrName]
    bf) Maybe (LIdP GhcPs)
    mty)
      = do [GenLocated SrcSpanAnnN Name]
    new_bf <- (LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name))
    -> [LocatedN RdrName]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall (t :: * -> *) (f :: * -> *) a b.
    (Traversable t, Applicative f) =>
    (a -> f b) -> t a -> f (t b)
    traverse LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall {ann}.
    GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupLocatedOccRn [LocatedN RdrName]
    bf
           Maybe (GenLocated SrcSpanAnnN Name)
    new_mty  <- (LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name))
    -> Maybe (LocatedN RdrName)
    -> IOEnv
         (Env TcGblEnv TcLclEnv) (Maybe (GenLocated SrcSpanAnnN Name))
    forall (t :: * -> *) (f :: * -> *) a b.
    (Traversable t, Applicative f) =>
    (a -> f b) -> t a -> f (t b)
    traverse LocatedN RdrName -> RnM (GenLocated SrcSpanAnnN Name)
    forall {ann}.
    GenLocated (SrcSpanAnn' ann) RdrName
    -> TcRn (GenLocated (SrcSpanAnn' ann) Name)
    lookupLocatedOccRn Maybe (LocatedN RdrName)
    Maybe (LIdP GhcPs)
    mty

           Module
    this_mod <- (TcGblEnv -> Module)
    -> IOEnv (Env TcGblEnv TcLclEnv) TcGblEnv
    -> IOEnv (Env TcGblEnv TcLclEnv) Module
    forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
    fmap TcGblEnv -> Module
    tcg_mod IOEnv (Env TcGblEnv TcLclEnv) TcGblEnv
    forall gbl lcl. TcRnIf gbl lcl gbl
    getGblEnv
           Bool -> TcRn () -> TcRn ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    unless ((GenLocated SrcSpanAnnN Name -> Bool)
    -> [GenLocated SrcSpanAnnN Name] -> Bool
    forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Bool
    any (Module -> Name -> Bool
    nameIsLocalOrFrom Module
    this_mod (Name -> Bool)
    -> (GenLocated SrcSpanAnnN Name -> Name)
    -> GenLocated SrcSpanAnnN Name
    -> Bool
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . GenLocated SrcSpanAnnN Name -> Name
    forall l e. GenLocated l e -> e
    unLoc) [GenLocated SrcSpanAnnN Name]
    new_bf) (TcRn () -> TcRn ()) -> TcRn () -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
             -- Why 'any'? See Note [Orphan COMPLETE pragmas]
             SDoc -> TcRn () -> TcRn ()
    forall a. SDoc -> TcM a -> TcM a
    addErrCtxt (String -> SDoc
    text String
    "In" SDoc -> SDoc -> SDoc
    <+> Sig GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Sig GhcPs
    sig) (TcRn () -> TcRn ()) -> TcRn () -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $ SDoc -> TcRn ()
    forall a. SDoc -> TcM a
    failWithTc SDoc
    orphanError

           (Sig GhcRn, NameSet) -> TcM (Sig GhcRn, NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XCompleteMatchSig GhcRn
    -> SourceText
    -> XRec GhcRn [LIdP GhcRn]
    -> Maybe (LIdP GhcRn)
    -> Sig GhcRn
    forall pass.
    XCompleteMatchSig pass
    -> SourceText
    -> XRec pass [LIdP pass]
    -> Maybe (LIdP pass)
    -> Sig pass
    CompleteMatchSig XCompleteMatchSig GhcRn
    forall a. EpAnn a
    noAnn SourceText
    s (SrcSpan
    -> [GenLocated SrcSpanAnnN Name]
    -> GenLocated SrcSpan [GenLocated SrcSpanAnnN Name]
    forall l e. l -> e -> GenLocated l e
    L SrcSpan
    l [GenLocated SrcSpanAnnN Name]
    new_bf) Maybe (GenLocated SrcSpanAnnN Name)
    Maybe (LIdP GhcRn)
    new_mty, NameSet
    emptyFVs)
      where
        orphanError :: SDoc
        orphanError :: SDoc
    orphanError =
          String -> SDoc
    text String
    "Orphan COMPLETE pragmas not supported" SDoc -> SDoc -> SDoc
    $$
          String -> SDoc
    text String
    "A COMPLETE pragma must mention at least one data constructor" SDoc -> SDoc -> SDoc
    $$
          String -> SDoc
    text String
    "or pattern synonym defined in the same module."

    {-
    Note [Orphan COMPLETE pragmas]
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    We define a COMPLETE pragma to be a non-orphan if it includes at least
    one conlike defined in the current module. Why is this sufficient?
    Well if you have a pattern match

      case expr of
        P1 -> ...
        P2 -> ...
        P3 -> ...

    any COMPLETE pragma which mentions a conlike other than P1, P2 or P3
    will not be of any use in verifying that the pattern match is
    exhaustive. So as we have certainly read the interface files that
    define P1, P2 and P3, we will have loaded all non-orphan COMPLETE
    pragmas that could be relevant to this pattern match.

    For now we simply disallow orphan COMPLETE pragmas, as the added
    complexity of supporting them properly doesn't seem worthwhile.
    -}

    ppr_sig_bndrs :: [LocatedN RdrName] -> SDoc
    ppr_sig_bndrs :: [LocatedN RdrName] -> SDoc
    ppr_sig_bndrs [LocatedN RdrName]
    bs = SDoc -> SDoc
    quotes ((LocatedN RdrName -> SDoc) -> [LocatedN RdrName] -> SDoc
    forall a. (a -> SDoc) -> [a] -> SDoc
    pprWithCommas LocatedN RdrName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr [LocatedN RdrName]
    bs)

    okHsSig :: HsSigCtxt -> LSig (GhcPass a) -> Bool
    okHsSig :: forall (a :: Pass). HsSigCtxt -> LSig (GhcPass a) -> Bool
    okHsSig HsSigCtxt
    ctxt (L SrcSpanAnnA
    _ Sig (GhcPass a)
    sig)
      = case (Sig (GhcPass a)
    sig, HsSigCtxt
    ctxt) of
         (ClassOpSig {}, ClsDeclCtxt {})  -> Bool
    True
         (ClassOpSig {}, InstDeclCtxt {}) -> Bool
    True
         (ClassOpSig {}, HsSigCtxt
    _)               -> Bool
    False

         (TypeSig {}, ClsDeclCtxt {})  -> Bool
    False
         (TypeSig {}, InstDeclCtxt {}) -> Bool
    False
         (TypeSig {}, HsSigCtxt
    _)               -> Bool
    True

         (PatSynSig {}, TopSigCtxt{}) -> Bool
    True
         (PatSynSig {}, HsSigCtxt
    _)            -> Bool
    False

         (FixSig {}, InstDeclCtxt {}) -> Bool
    False
         (FixSig {}, HsSigCtxt
    _)               -> Bool
    True

         (IdSig {}, TopSigCtxt {})   -> Bool
    True
         (IdSig {}, InstDeclCtxt {}) -> Bool
    True
         (IdSig {}, HsSigCtxt
    _)               -> Bool
    False

         (InlineSig {}, HsBootCtxt {}) -> Bool
    False
         (InlineSig {}, HsSigCtxt
    _)             -> Bool
    True

         (SpecSig {}, TopSigCtxt {})    -> Bool
    True
         (SpecSig {}, LocalBindCtxt {}) -> Bool
    True
         (SpecSig {}, InstDeclCtxt {})  -> Bool
    True
         (SpecSig {}, HsSigCtxt
    _)                -> Bool
    False

         (SpecInstSig {}, InstDeclCtxt {}) -> Bool
    True
         (SpecInstSig {}, HsSigCtxt
    _)               -> Bool
    False

         (MinimalSig {}, ClsDeclCtxt {}) -> Bool
    True
         (MinimalSig {}, HsSigCtxt
    _)              -> Bool
    False

         (SCCFunSig {}, HsBootCtxt {}) -> Bool
    False
         (SCCFunSig {}, HsSigCtxt
    _)             -> Bool
    True

         (CompleteMatchSig {}, TopSigCtxt {} ) -> Bool
    True
         (CompleteMatchSig {}, HsSigCtxt
    _)              -> Bool
    False

    -------------------
    findDupSigs :: [LSig GhcPs] -> [NonEmpty (LocatedN RdrName, Sig GhcPs)]
    -- Check for duplicates on RdrName version,
    -- because renamed version has unboundName for
    -- not-in-scope binders, which gives bogus dup-sig errors
    -- NB: in a class decl, a 'generic' sig is not considered
    --     equal to an ordinary sig, so we allow, say
    --           class C a where
    --             op :: a -> a
    --             default op :: Eq a => a -> a
    findDupSigs :: [LSig GhcPs] -> [NonEmpty (LocatedN RdrName, Sig GhcPs)]
    findDupSigs [LSig GhcPs]
    sigs
      = ((LocatedN RdrName, Sig GhcPs)
     -> (LocatedN RdrName, Sig GhcPs) -> Bool)
    -> [(LocatedN RdrName, Sig GhcPs)]
    -> [NonEmpty (LocatedN RdrName, Sig GhcPs)]
    forall a. (a -> a -> Bool) -> [a] -> [NonEmpty a]
    findDupsEq (LocatedN RdrName, Sig GhcPs)
    -> (LocatedN RdrName, Sig GhcPs) -> Bool
    matching_sig ((GenLocated SrcSpanAnnA (Sig GhcPs)
     -> [(LocatedN RdrName, Sig GhcPs)])
    -> [GenLocated SrcSpanAnnA (Sig GhcPs)]
    -> [(LocatedN RdrName, Sig GhcPs)]
    forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
    concatMap (Sig GhcPs -> [(LocatedN RdrName, Sig GhcPs)]
    expand_sig (Sig GhcPs -> [(LocatedN RdrName, Sig GhcPs)])
    -> (GenLocated SrcSpanAnnA (Sig GhcPs) -> Sig GhcPs)
    -> GenLocated SrcSpanAnnA (Sig GhcPs)
    -> [(LocatedN RdrName, Sig GhcPs)]
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . GenLocated SrcSpanAnnA (Sig GhcPs) -> Sig GhcPs
    forall l e. GenLocated l e -> e
    unLoc) [GenLocated SrcSpanAnnA (Sig GhcPs)]
    [LSig GhcPs]
    sigs)
      where
        expand_sig :: Sig GhcPs -> [(LocatedN RdrName, Sig GhcPs)] -- AZ
        expand_sig :: Sig GhcPs -> [(LocatedN RdrName, Sig GhcPs)]
    expand_sig sig :: Sig GhcPs
    sig@(FixSig XFixSig GhcPs
    _ (FixitySig XFixitySig GhcPs
    _ [LIdP GhcPs]
    ns Fixity
    _)) = [LocatedN RdrName]
    -> [Sig GhcPs] -> [(LocatedN RdrName, Sig GhcPs)]
    forall a b. [a] -> [b] -> [(a, b)]
    zip [LocatedN RdrName]
    [LIdP GhcPs]
    ns (Sig GhcPs -> [Sig GhcPs]
    forall a. a -> [a]
    repeat Sig GhcPs
    sig)
        expand_sig sig :: Sig GhcPs
    sig@(InlineSig XInlineSig GhcPs
    _ LIdP GhcPs
    n InlinePragma
    _)             = [(LocatedN RdrName
    LIdP GhcPs
    n,Sig GhcPs
    sig)]
        expand_sig sig :: Sig GhcPs
    sig@(TypeSig XTypeSig GhcPs
    _ [LIdP GhcPs]
    ns LHsSigWcType GhcPs
    _)              = [(LocatedN RdrName
    n,Sig GhcPs
    sig) | LocatedN RdrName
    n <- [LocatedN RdrName]
    [LIdP GhcPs]
    ns]
        expand_sig sig :: Sig GhcPs
    sig@(ClassOpSig XClassOpSig GhcPs
    _ Bool
    _ [LIdP GhcPs]
    ns LHsSigType GhcPs
    _)         = [(LocatedN RdrName
    n,Sig GhcPs
    sig) | LocatedN RdrName
    n <- [LocatedN RdrName]
    [LIdP GhcPs]
    ns]
        expand_sig sig :: Sig GhcPs
    sig@(PatSynSig XPatSynSig GhcPs
    _ [LIdP GhcPs]
    ns  LHsSigType GhcPs
    _ )          = [(LocatedN RdrName
    n,Sig GhcPs
    sig) | LocatedN RdrName
    n <- [LocatedN RdrName]
    [LIdP GhcPs]
    ns]
        expand_sig sig :: Sig GhcPs
    sig@(SCCFunSig XSCCFunSig GhcPs
    _ SourceText
    _ LIdP GhcPs
    n Maybe (XRec GhcPs StringLiteral)
    _)           = [(LocatedN RdrName
    LIdP GhcPs
    n,Sig GhcPs
    sig)]
        expand_sig Sig GhcPs
    _ = []

        matching_sig :: (LocatedN RdrName, Sig GhcPs) -> (LocatedN RdrName, Sig GhcPs) -> Bool --AZ
        matching_sig :: (LocatedN RdrName, Sig GhcPs)
    -> (LocatedN RdrName, Sig GhcPs) -> Bool
    matching_sig (L SrcSpanAnnN
    _ RdrName
    n1,Sig GhcPs
    sig1) (L SrcSpanAnnN
    _ RdrName
    n2,Sig GhcPs
    sig2)       = RdrName
    n1 RdrName -> RdrName -> Bool
    forall a. Eq a => a -> a -> Bool
    == RdrName
    n2 Bool -> Bool -> Bool
    && Sig GhcPs -> Sig GhcPs -> Bool
    forall {pass} {pass}. Sig pass -> Sig pass -> Bool
    mtch Sig GhcPs
    sig1 Sig GhcPs
    sig2
        mtch :: Sig pass -> Sig pass -> Bool
    mtch (FixSig {})           (FixSig {})         = Bool
    True
        mtch (InlineSig {})        (InlineSig {})      = Bool
    True
        mtch (TypeSig {})          (TypeSig {})        = Bool
    True
        mtch (ClassOpSig XClassOpSig pass
    _ Bool
    d1 [LIdP pass]
    _ LHsSigType pass
    _) (ClassOpSig XClassOpSig pass
    _ Bool
    d2 [LIdP pass]
    _ LHsSigType pass
    _) = Bool
    d1 Bool -> Bool -> Bool
    forall a. Eq a => a -> a -> Bool
    == Bool
    d2
        mtch (PatSynSig XPatSynSig pass
    _ [LIdP pass]
    _ LHsSigType pass
    _)     (PatSynSig XPatSynSig pass
    _ [LIdP pass]
    _ LHsSigType pass
    _)   = Bool
    True
        mtch (SCCFunSig{})         (SCCFunSig{})       = Bool
    True
        mtch Sig pass
    _ Sig pass
    _ = Bool
    False

    -- Warn about multiple MINIMAL signatures
    checkDupMinimalSigs :: [LSig GhcPs] -> RnM ()
    checkDupMinimalSigs :: [LSig GhcPs] -> TcRn ()
    checkDupMinimalSigs [LSig GhcPs]
    sigs
      = case (LSig GhcPs -> Bool) -> [LSig GhcPs] -> [LSig GhcPs]
    forall a. (a -> Bool) -> [a] -> [a]
    filter LSig GhcPs -> Bool
    forall p. UnXRec p => LSig p -> Bool
    isMinimalLSig [LSig GhcPs]
    sigs of
          minSigs :: [LSig GhcPs]
    minSigs@(LSig GhcPs
    _:LSig GhcPs
    _:[LSig GhcPs]
    _) -> [LSig GhcPs] -> TcRn ()
    dupMinimalSigErr [LSig GhcPs]
    minSigs
          [LSig GhcPs]
    _ -> () -> TcRn ()
    forall (m :: * -> *) a. Monad m => a -> m a
    return ()

    {-
    ************************************************************************
    *                                                                      *
    \subsection{Match}
    *                                                                      *
    ************************************************************************
    -}

    type AnnoBody body
      = ( Anno [LocatedA (Match GhcRn (LocatedA (body GhcRn)))] ~ SrcSpanAnnL
        , Anno [LocatedA (Match GhcPs (LocatedA (body GhcPs)))] ~ SrcSpanAnnL
        , Anno (Match GhcRn (LocatedA (body GhcRn))) ~ SrcSpanAnnA
        , Anno (Match GhcPs (LocatedA (body GhcPs))) ~ SrcSpanAnnA
        , Anno (GRHS GhcRn (LocatedA (body GhcRn))) ~ SrcSpan
        , Anno (GRHS GhcPs (LocatedA (body GhcPs))) ~ SrcSpan
        , Outputable (body GhcPs)
        )

    rnMatchGroup :: (Outputable (body GhcPs), AnnoBody body) => HsMatchContext GhcRn
                 -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), FreeVars))
                 -> MatchGroup GhcPs (LocatedA (body GhcPs))
                 -> RnM (MatchGroup GhcRn (LocatedA (body GhcRn)), FreeVars)
    rnMatchGroup :: forall (body :: * -> *).
    (Outputable (body GhcPs), AnnoBody body) =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> MatchGroup GhcPs (LocatedA (body GhcPs))
    -> RnM (MatchGroup GhcRn (LocatedA (body GhcRn)), NameSet)
    rnMatchGroup HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody (MG { mg_alts :: forall p body. MatchGroup p body -> XRec p [LMatch p body]
    mg_alts = L SrcSpanAnnL
    lm [LocatedA (Match GhcPs (LocatedA (body GhcPs)))]
    ms, mg_origin :: forall p body. MatchGroup p body -> Origin
    mg_origin = Origin
    origin })
      = do { Bool
    empty_case_ok <- Extension -> TcRnIf TcGblEnv TcLclEnv Bool
    forall gbl lcl. Extension -> TcRnIf gbl lcl Bool
    xoptM Extension
    LangExt.EmptyCase
           ; Bool -> TcRn () -> TcRn ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    when ([LocatedA (Match GhcPs (LocatedA (body GhcPs)))] -> Bool
    forall (t :: * -> *) a. Foldable t => t a -> Bool
    null [LocatedA (Match GhcPs (LocatedA (body GhcPs)))]
    ms Bool -> Bool -> Bool
    && Bool -> Bool
    not Bool
    empty_case_ok) (SDoc -> TcRn ()
    addErr (HsMatchContext GhcRn -> SDoc
    emptyCaseErr HsMatchContext GhcRn
    ctxt))
           ; ([LocatedA (Match GhcRn (LocatedA (body GhcRn)))]
    new_ms, NameSet
    ms_fvs) <- (LocatedA (Match GhcPs (LocatedA (body GhcPs)))
     -> RnM (LocatedA (Match GhcRn (LocatedA (body GhcRn))), NameSet))
    -> [LocatedA (Match GhcPs (LocatedA (body GhcPs)))]
    -> RnM ([LocatedA (Match GhcRn (LocatedA (body GhcRn)))], NameSet)
    forall a b. (a -> RnM (b, NameSet)) -> [a] -> RnM ([b], NameSet)
    mapFvRn (HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> LMatch GhcPs (LocatedA (body GhcPs))
    -> RnM (LMatch GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> LMatch GhcPs (LocatedA (body GhcPs))
    -> RnM (LMatch GhcRn (LocatedA (body GhcRn)), NameSet)
    rnMatch HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody) [LocatedA (Match GhcPs (LocatedA (body GhcPs)))]
    ms
           ; (MatchGroup GhcRn (LocatedA (body GhcRn)), NameSet)
    -> RnM (MatchGroup GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Origin
    -> LocatedL [LocatedA (Match GhcRn (LocatedA (body GhcRn)))]
    -> MatchGroup GhcRn (LocatedA (body GhcRn))
    forall (p :: Pass) (body :: * -> *).
    AnnoBody p body =>
    Origin
    -> LocatedL
         [LocatedA (Match (GhcPass p) (LocatedA (body (GhcPass p))))]
    -> MatchGroup (GhcPass p) (LocatedA (body (GhcPass p)))
    mkMatchGroup Origin
    origin (SrcSpanAnnL
    -> [LocatedA (Match GhcRn (LocatedA (body GhcRn)))]
    -> LocatedL [LocatedA (Match GhcRn (LocatedA (body GhcRn)))]
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnL
    lm [LocatedA (Match GhcRn (LocatedA (body GhcRn)))]
    new_ms), NameSet
    ms_fvs) }

    rnMatch :: AnnoBody body
            => HsMatchContext GhcRn
            -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), FreeVars))
            -> LMatch GhcPs (LocatedA (body GhcPs))
            -> RnM (LMatch GhcRn (LocatedA (body GhcRn)), FreeVars)
    rnMatch :: forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> LMatch GhcPs (LocatedA (body GhcPs))
    -> RnM (LMatch GhcRn (LocatedA (body GhcRn)), NameSet)
    rnMatch HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody = (Match GhcPs (LocatedA (body GhcPs))
     -> TcM (Match GhcRn (LocatedA (body GhcRn)), NameSet))
    -> LocatedA (Match GhcPs (LocatedA (body GhcPs)))
    -> TcM (LocatedA (Match GhcRn (LocatedA (body GhcRn))), NameSet)
    forall a b c.
    (a -> TcM (b, c)) -> LocatedA a -> TcM (LocatedA b, c)
    wrapLocFstMA (HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> Match GhcPs (LocatedA (body GhcPs))
    -> TcM (Match GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> Match GhcPs (LocatedA (body GhcPs))
    -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet)
    rnMatch' HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody)

    rnMatch' :: (AnnoBody body)
             => HsMatchContext GhcRn
             -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), FreeVars))
             -> Match GhcPs (LocatedA (body GhcPs))
             -> RnM (Match GhcRn (LocatedA (body GhcRn)), FreeVars)
    rnMatch' :: forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> Match GhcPs (LocatedA (body GhcPs))
    -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet)
    rnMatch' HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody (Match { m_ctxt :: forall p body. Match p body -> HsMatchContext (NoGhcTc p)
    m_ctxt = HsMatchContext (NoGhcTc GhcPs)
    mf, m_pats :: forall p body. Match p body -> [LPat p]
    m_pats = [LPat GhcPs]
    pats, m_grhss :: forall p body. Match p body -> GRHSs p body
    m_grhss = GRHSs GhcPs (LocatedA (body GhcPs))
    grhss })
      = HsMatchContext GhcRn
    -> [LPat GhcPs]
    -> ([LPat GhcRn]
        -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet))
    -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet)
    forall a.
    HsMatchContext GhcRn
    -> [LPat GhcPs]
    -> ([LPat GhcRn] -> RnM (a, NameSet))
    -> RnM (a, NameSet)
    rnPats HsMatchContext GhcRn
    ctxt [LPat GhcPs]
    pats (([LPat GhcRn]
      -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet))
     -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet))
    -> ([LPat GhcRn]
        -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet))
    -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet)
    forall a b. (a -> b) -> a -> b
    $ \ [LPat GhcRn]
    pats' -> do
            { (GRHSs GhcRn (LocatedA (body GhcRn))
    grhss', NameSet
    grhss_fvs) <- HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> GRHSs GhcPs (LocatedA (body GhcPs))
    -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> GRHSs GhcPs (LocatedA (body GhcPs))
    -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    rnGRHSs HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody GRHSs GhcPs (LocatedA (body GhcPs))
    grhss
            ; let mf' :: HsMatchContext GhcRn
    mf' = case (HsMatchContext GhcRn
    ctxt, HsMatchContext (NoGhcTc GhcPs)
    HsMatchContext GhcPs
    mf) of
                          (FunRhs { mc_fun :: forall p. HsMatchContext p -> LIdP p
    mc_fun = L SrcSpanAnnN
    _ Name
    funid }, FunRhs { mc_fun :: forall p. HsMatchContext p -> LIdP p
    mc_fun = L SrcSpanAnnN
    lf RdrName
    _ })
                                                -> HsMatchContext (NoGhcTc GhcPs)
    HsMatchContext GhcPs
    mf { mc_fun :: LIdP GhcRn
    mc_fun = SrcSpanAnnN -> Name -> GenLocated SrcSpanAnnN Name
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnN
    lf Name
    funid }
                          (HsMatchContext GhcRn, HsMatchContext GhcPs)
    _                     -> HsMatchContext GhcRn
    ctxt
            ; (Match GhcRn (LocatedA (body GhcRn)), NameSet)
    -> RnM (Match GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (Match { m_ext :: XCMatch GhcRn (LocatedA (body GhcRn))
    m_ext = XCMatch GhcRn (LocatedA (body GhcRn))
    forall a. EpAnn a
    noAnn, m_ctxt :: HsMatchContext (NoGhcTc GhcRn)
    m_ctxt = HsMatchContext (NoGhcTc GhcRn)
    HsMatchContext GhcRn
    mf', m_pats :: [LPat GhcRn]
    m_pats = [LPat GhcRn]
    pats'
                            , m_grhss :: GRHSs GhcRn (LocatedA (body GhcRn))
    m_grhss = GRHSs GhcRn (LocatedA (body GhcRn))
    grhss'}, NameSet
    grhss_fvs ) }

    emptyCaseErr :: HsMatchContext GhcRn -> SDoc
    emptyCaseErr :: HsMatchContext GhcRn -> SDoc
    emptyCaseErr HsMatchContext GhcRn
    ctxt = SDoc -> Int -> SDoc -> SDoc
    hang (String -> SDoc
    text String
    "Empty list of alternatives in" SDoc -> SDoc -> SDoc
    <+> SDoc
    pp_ctxt)
                           Int
    2 (String -> SDoc
    text String
    "Use EmptyCase to allow this")
      where
        pp_ctxt :: SDoc
    pp_ctxt = case HsMatchContext GhcRn
    ctxt of
                    HsMatchContext GhcRn
    CaseAlt    -> String -> SDoc
    text String
    "case expression"
                    HsMatchContext GhcRn
    LambdaExpr -> String -> SDoc
    text String
    "\\case expression"
                    HsMatchContext GhcRn
    _ -> String -> SDoc
    text String
    "(unexpected)" SDoc -> SDoc -> SDoc
    <+> HsMatchContext GhcRn -> SDoc
    forall p.
    (Outputable (IdP p), UnXRec p) =>
    HsMatchContext p -> SDoc
    pprMatchContextNoun HsMatchContext GhcRn
    ctxt

    {-
    ************************************************************************
    *                                                                      *
    \subsubsection{Guarded right-hand sides (GRHSs)}
    *                                                                      *
    ************************************************************************
    -}

    rnGRHSs :: AnnoBody body
            => HsMatchContext GhcRn
            -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), FreeVars))
            -> GRHSs GhcPs (LocatedA (body GhcPs))
            -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), FreeVars)
    rnGRHSs :: forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> GRHSs GhcPs (LocatedA (body GhcPs))
    -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    rnGRHSs HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody (GRHSs XCGRHSs GhcPs (LocatedA (body GhcPs))
    _ [LGRHS GhcPs (LocatedA (body GhcPs))]
    grhss HsLocalBinds GhcPs
    binds)
      = HsLocalBinds GhcPs
    -> (HsLocalBinds GhcRn
        -> NameSet -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet))
    -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    forall result.
    HsLocalBinds GhcPs
    -> (HsLocalBinds GhcRn -> NameSet -> RnM (result, NameSet))
    -> RnM (result, NameSet)
    rnLocalBindsAndThen HsLocalBinds GhcPs
    binds   ((HsLocalBinds GhcRn
      -> NameSet -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet))
     -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet))
    -> (HsLocalBinds GhcRn
        -> NameSet -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet))
    -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    forall a b. (a -> b) -> a -> b
    $ \ HsLocalBinds GhcRn
    binds' NameSet
    _ -> do
        ([GenLocated SrcSpan (GRHS GhcRn (LocatedA (body GhcRn)))]
    grhss', NameSet
    fvGRHSs) <- (GenLocated SrcSpan (GRHS GhcPs (LocatedA (body GhcPs)))
     -> RnM
          (GenLocated SrcSpan (GRHS GhcRn (LocatedA (body GhcRn))), NameSet))
    -> [GenLocated SrcSpan (GRHS GhcPs (LocatedA (body GhcPs)))]
    -> RnM
         ([GenLocated SrcSpan (GRHS GhcRn (LocatedA (body GhcRn)))],
          NameSet)
    forall a b. (a -> RnM (b, NameSet)) -> [a] -> RnM ([b], NameSet)
    mapFvRn (HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> LGRHS GhcPs (LocatedA (body GhcPs))
    -> RnM (LGRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> LGRHS GhcPs (LocatedA (body GhcPs))
    -> RnM (LGRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    rnGRHS HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody) [GenLocated SrcSpan (GRHS GhcPs (LocatedA (body GhcPs)))]
    [LGRHS GhcPs (LocatedA (body GhcPs))]
    grhss
        (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    -> RnM (GRHSs GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XCGRHSs GhcRn (LocatedA (body GhcRn))
    -> [LGRHS GhcRn (LocatedA (body GhcRn))]
    -> HsLocalBinds GhcRn
    -> GRHSs GhcRn (LocatedA (body GhcRn))
    forall p body.
    XCGRHSs p body -> [LGRHS p body] -> HsLocalBinds p -> GRHSs p body
    GRHSs NoExtField
    XCGRHSs GhcRn (LocatedA (body GhcRn))
    noExtField [GenLocated SrcSpan (GRHS GhcRn (LocatedA (body GhcRn)))]
    [LGRHS GhcRn (LocatedA (body GhcRn))]
    grhss' HsLocalBinds GhcRn
    binds', NameSet
    fvGRHSs)

    rnGRHS :: AnnoBody body
           => HsMatchContext GhcRn
           -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), FreeVars))
           -> LGRHS GhcPs (LocatedA (body GhcPs))
           -> RnM (LGRHS GhcRn (LocatedA (body GhcRn)), FreeVars)
    rnGRHS :: forall (body :: * -> *).
    AnnoBody body =>
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> LGRHS GhcPs (LocatedA (body GhcPs))
    -> RnM (LGRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    rnGRHS HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody = (GRHS GhcPs (LocatedA (body GhcPs))
     -> TcM (GRHS GhcRn (LocatedA (body GhcRn)), NameSet))
    -> Located (GRHS GhcPs (LocatedA (body GhcPs)))
    -> TcM (Located (GRHS GhcRn (LocatedA (body GhcRn))), NameSet)
    forall a b c. (a -> TcM (b, c)) -> Located a -> TcM (Located b, c)
    wrapLocFstM (HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> GRHS GhcPs (LocatedA (body GhcPs))
    -> TcM (GRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (body :: * -> *).
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> GRHS GhcPs (LocatedA (body GhcPs))
    -> RnM (GRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    rnGRHS' HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody)

    rnGRHS' :: HsMatchContext GhcRn
            -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), FreeVars))
            -> GRHS GhcPs (LocatedA (body GhcPs))
            -> RnM (GRHS GhcRn (LocatedA (body GhcRn)), FreeVars)
    rnGRHS' :: forall (body :: * -> *).
    HsMatchContext GhcRn
    -> (LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet))
    -> GRHS GhcPs (LocatedA (body GhcPs))
    -> RnM (GRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    rnGRHS' HsMatchContext GhcRn
    ctxt LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody (GRHS XCGRHS GhcPs (LocatedA (body GhcPs))
    _ [GuardLStmt GhcPs]
    guards LocatedA (body GhcPs)
    rhs)
      = do  { Bool
    pattern_guards_allowed <- Extension -> TcRnIf TcGblEnv TcLclEnv Bool
    forall gbl lcl. Extension -> TcRnIf gbl lcl Bool
    xoptM Extension
    LangExt.PatternGuards
            ; (([GenLocated
       SrcSpanAnnA (Stmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)))]
    guards', LocatedA (body GhcRn)
    rhs'), NameSet
    fvs) <- HsStmtContext GhcRn
    -> (HsExpr GhcPs -> RnM (HsExpr GhcRn, NameSet))
    -> [LStmt GhcPs (LocatedA (HsExpr GhcPs))]
    -> ([Name] -> RnM (LocatedA (body GhcRn), NameSet))
    -> RnM
         (([LStmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))],
           LocatedA (body GhcRn)),
          NameSet)
    forall (body :: * -> *) thing.
    AnnoBody body =>
    HsStmtContext GhcRn
    -> (body GhcPs -> RnM (body GhcRn, NameSet))
    -> [LStmt GhcPs (LocatedA (body GhcPs))]
    -> ([Name] -> RnM (thing, NameSet))
    -> RnM (([LStmt GhcRn (LocatedA (body GhcRn))], thing), NameSet)
    rnStmts (HsMatchContext GhcRn -> HsStmtContext GhcRn
    forall p. HsMatchContext p -> HsStmtContext p
    PatGuard HsMatchContext GhcRn
    ctxt) HsExpr GhcPs -> RnM (HsExpr GhcRn, NameSet)
    rnExpr [LStmt GhcPs (LocatedA (HsExpr GhcPs))]
    [GuardLStmt GhcPs]
    guards (([Name] -> RnM (LocatedA (body GhcRn), NameSet))
     -> RnM
          (([LStmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))],
            LocatedA (body GhcRn)),
           NameSet))
    -> ([Name] -> RnM (LocatedA (body GhcRn), NameSet))
    -> RnM
         (([LStmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))],
           LocatedA (body GhcRn)),
          NameSet)
    forall a b. (a -> b) -> a -> b
    $ \ [Name]
    _ ->
                                        LocatedA (body GhcPs) -> RnM (LocatedA (body GhcRn), NameSet)
    rnBody LocatedA (body GhcPs)
    rhs

            ; Bool -> TcRn () -> TcRn ()
    forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
    unless (Bool
    pattern_guards_allowed Bool -> Bool -> Bool
    || [GenLocated
       SrcSpanAnnA (Stmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)))]
    -> Bool
    forall {l} {idL} {idR} {body}.
    [GenLocated l (StmtLR idL idR body)] -> Bool
    is_standard_guard [GenLocated
       SrcSpanAnnA (Stmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)))]
    guards')
                     (WarnReason -> SDoc -> TcRn ()
    addWarn WarnReason
    NoReason ([LStmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))] -> SDoc
    forall body.
    (Outputable body, Anno (Stmt GhcRn body) ~ SrcSpanAnnA) =>
    [LStmtLR GhcRn GhcRn body] -> SDoc
    nonStdGuardErr [GenLocated
       SrcSpanAnnA (Stmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)))]
    [LStmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn))]
    guards'))

            ; (GRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    -> RnM (GRHS GhcRn (LocatedA (body GhcRn)), NameSet)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XCGRHS GhcRn (LocatedA (body GhcRn))
    -> [GuardLStmt GhcRn]
    -> LocatedA (body GhcRn)
    -> GRHS GhcRn (LocatedA (body GhcRn))
    forall p body.
    XCGRHS p body -> [GuardLStmt p] -> body -> GRHS p body
    GRHS XCGRHS GhcRn (LocatedA (body GhcRn))
    forall a. EpAnn a
    noAnn [GenLocated
       SrcSpanAnnA (Stmt GhcRn (GenLocated SrcSpanAnnA (HsExpr GhcRn)))]
    [GuardLStmt GhcRn]
    guards' LocatedA (body GhcRn)
    rhs', NameSet
    fvs) }
      where
            -- Standard Haskell 1.4 guards are just a single boolean
            -- expression, rather than a list of qualifiers as in the
            -- Glasgow extension
        is_standard_guard :: [GenLocated l (StmtLR idL idR body)] -> Bool
    is_standard_guard []                  = Bool
    True
        is_standard_guard [L l
    _ (BodyStmt {})] = Bool
    True
        is_standard_guard [GenLocated l (StmtLR idL idR body)]
    _                   = Bool
    False

    {-
    *********************************************************
    *                                                       *
            Source-code fixity declarations
    *                                                       *
    *********************************************************
    -}

    rnSrcFixityDecl :: HsSigCtxt -> FixitySig GhcPs -> RnM (FixitySig GhcRn)
    -- Rename a fixity decl, so we can put
    -- the renamed decl in the renamed syntax tree
    -- Errors if the thing being fixed is not defined locally.
    rnSrcFixityDecl :: HsSigCtxt -> FixitySig GhcPs -> RnM (FixitySig GhcRn)
    rnSrcFixityDecl HsSigCtxt
    sig_ctxt = FixitySig GhcPs -> RnM (FixitySig GhcRn)
    rn_decl
      where
        rn_decl :: FixitySig GhcPs -> RnM (FixitySig GhcRn)
            -- GHC extension: look up both the tycon and data con
            -- for con-like things; hence returning a list
            -- If neither are in scope, report an error; otherwise
            -- return a fixity sig for each (slightly odd)
        rn_decl :: FixitySig GhcPs -> RnM (FixitySig GhcRn)
    rn_decl (FixitySig XFixitySig GhcPs
    _ [LIdP GhcPs]
    fnames Fixity
    fixity)
          = do [GenLocated SrcSpanAnnN Name]
    names <- (LocatedN RdrName
     -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name])
    -> [LocatedN RdrName]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall (m :: * -> *) a b. Monad m => (a -> m [b]) -> [a] -> m [b]
    concatMapM LocatedN RdrName
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    lookup_one [LocatedN RdrName]
    [LIdP GhcPs]
    fnames
               FixitySig GhcRn -> RnM (FixitySig GhcRn)
    forall (m :: * -> *) a. Monad m => a -> m a
    return (XFixitySig GhcRn -> [LIdP GhcRn] -> Fixity -> FixitySig GhcRn
    forall pass.
    XFixitySig pass -> [LIdP pass] -> Fixity -> FixitySig pass
    FixitySig NoExtField
    XFixitySig GhcRn
    noExtField [GenLocated SrcSpanAnnN Name]
    [LIdP GhcRn]
    names Fixity
    fixity)

        lookup_one :: LocatedN RdrName -> RnM [LocatedN Name]
        lookup_one :: LocatedN RdrName
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    lookup_one (L SrcSpanAnnN
    name_loc RdrName
    rdr_name)
          = SrcSpanAnnN
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall ann a. SrcSpanAnn' ann -> TcRn a -> TcRn a
    setSrcSpanA SrcSpanAnnN
    name_loc (IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
     -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name])
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall a b. (a -> b) -> a -> b
    $
                        -- This lookup will fail if the name is not defined in the
                        -- same binding group as this fixity declaration.
            do [(RdrName, Name)]
    names <- HsSigCtxt -> SDoc -> RdrName -> RnM [(RdrName, Name)]
    lookupLocalTcNames HsSigCtxt
    sig_ctxt SDoc
    what RdrName
    rdr_name
               [GenLocated SrcSpanAnnN Name]
    -> IOEnv (Env TcGblEnv TcLclEnv) [GenLocated SrcSpanAnnN Name]
    forall (m :: * -> *) a. Monad m => a -> m a
    return [ SrcSpanAnnN -> Name -> GenLocated SrcSpanAnnN Name
    forall l e. l -> e -> GenLocated l e
    L SrcSpanAnnN
    name_loc Name
    name | (RdrName
    _, Name
    name) <- [(RdrName, Name)]
    names ]
        what :: SDoc
    what = String -> SDoc
    text String
    "fixity signature"

    {-
    ************************************************************************
    *                                                                      *
    \subsection{Error messages}
    *                                                                      *
    ************************************************************************
    -}

    dupSigDeclErr :: NonEmpty (LocatedN RdrName, Sig GhcPs) -> RnM ()
    dupSigDeclErr :: NonEmpty (LocatedN RdrName, Sig GhcPs) -> TcRn ()
    dupSigDeclErr pairs :: NonEmpty (LocatedN RdrName, Sig GhcPs)
    pairs@((L SrcSpanAnnN
    loc RdrName
    name, Sig GhcPs
    sig) :| [(LocatedN RdrName, Sig GhcPs)]
    _)
      = SrcSpan -> SDoc -> TcRn ()
    addErrAt (SrcSpanAnnN -> SrcSpan
    forall a. SrcSpanAnn' a -> SrcSpan
    locA SrcSpanAnnN
    loc) (SDoc -> TcRn ()) -> SDoc -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
        [SDoc] -> SDoc
    vcat [ String -> SDoc
    text String
    "Duplicate" SDoc -> SDoc -> SDoc
    <+> SDoc
    what_it_is
               SDoc -> SDoc -> SDoc
    <> String -> SDoc
    text String
    "s for" SDoc -> SDoc -> SDoc
    <+> SDoc -> SDoc
    quotes (RdrName -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr RdrName
    name)
             , String -> SDoc
    text String
    "at" SDoc -> SDoc -> SDoc
    <+> [SDoc] -> SDoc
    vcat ((SrcSpan -> SDoc) -> [SrcSpan] -> [SDoc]
    forall a b. (a -> b) -> [a] -> [b]
    map SrcSpan -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr ([SrcSpan] -> [SDoc]) -> [SrcSpan] -> [SDoc]
    forall a b. (a -> b) -> a -> b
    $ (SrcSpan -> SrcSpan -> Ordering) -> [SrcSpan] -> [SrcSpan]
    forall a. (a -> a -> Ordering) -> [a] -> [a]
    sortBy SrcSpan -> SrcSpan -> Ordering
    SrcLoc.leftmost_smallest
                                           ([SrcSpan] -> [SrcSpan]) -> [SrcSpan] -> [SrcSpan]
    forall a b. (a -> b) -> a -> b
    $ ((LocatedN RdrName, Sig GhcPs) -> SrcSpan)
    -> [(LocatedN RdrName, Sig GhcPs)] -> [SrcSpan]
    forall a b. (a -> b) -> [a] -> [b]
    map (LocatedN RdrName -> SrcSpan
    forall a e. GenLocated (SrcSpanAnn' a) e -> SrcSpan
    getLocA (LocatedN RdrName -> SrcSpan)
    -> ((LocatedN RdrName, Sig GhcPs) -> LocatedN RdrName)
    -> (LocatedN RdrName, Sig GhcPs)
    -> SrcSpan
    forall b c a. (b -> c) -> (a -> b) -> a -> c
    . (LocatedN RdrName, Sig GhcPs) -> LocatedN RdrName
    forall a b. (a, b) -> a
    fst)
                                           ([(LocatedN RdrName, Sig GhcPs)] -> [SrcSpan])
    -> [(LocatedN RdrName, Sig GhcPs)] -> [SrcSpan]
    forall a b. (a -> b) -> a -> b
    $ NonEmpty (LocatedN RdrName, Sig GhcPs)
    -> [(LocatedN RdrName, Sig GhcPs)]
    forall (t :: * -> *) a. Foldable t => t a -> [a]
    toList NonEmpty (LocatedN RdrName, Sig GhcPs)
    pairs)
             ]
      where
        what_it_is :: SDoc
    what_it_is = Sig GhcPs -> SDoc
    forall name. Sig name -> SDoc
    hsSigDoc Sig GhcPs
    sig

    misplacedSigErr :: LSig GhcRn -> RnM ()
    misplacedSigErr :: LSig GhcRn -> TcRn ()
    misplacedSigErr (L SrcSpanAnnA
    loc Sig GhcRn
    sig)
      = SrcSpan -> SDoc -> TcRn ()
    addErrAt (SrcSpanAnnA -> SrcSpan
    forall a. SrcSpanAnn' a -> SrcSpan
    locA SrcSpanAnnA
    loc) (SDoc -> TcRn ()) -> SDoc -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
        [SDoc] -> SDoc
    sep [String -> SDoc
    text String
    "Misplaced" SDoc -> SDoc -> SDoc
    <+> Sig GhcRn -> SDoc
    forall name. Sig name -> SDoc
    hsSigDoc Sig GhcRn
    sig SDoc -> SDoc -> SDoc
    <> SDoc
    colon, Sig GhcRn -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Sig GhcRn
    sig]

    defaultSigErr :: Sig GhcPs -> SDoc
    defaultSigErr :: Sig GhcPs -> SDoc
    defaultSigErr Sig GhcPs
    sig = [SDoc] -> SDoc
    vcat [ SDoc -> Int -> SDoc -> SDoc
    hang (String -> SDoc
    text String
    "Unexpected default signature:")
                                  Int
    2 (Sig GhcPs -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Sig GhcPs
    sig)
                             , String -> SDoc
    text String
    "Use DefaultSignatures to enable default signatures" ]

    bindsInHsBootFile :: LHsBindsLR GhcRn GhcPs -> SDoc
    bindsInHsBootFile :: LHsBindsLR GhcRn GhcPs -> SDoc
    bindsInHsBootFile LHsBindsLR GhcRn GhcPs
    mbinds
      = SDoc -> Int -> SDoc -> SDoc
    hang (String -> SDoc
    text String
    "Bindings in hs-boot files are not allowed")
           Int
    2 (Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs)) -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr Bag (GenLocated SrcSpanAnnA (HsBindLR GhcRn GhcPs))
    LHsBindsLR GhcRn GhcPs
    mbinds)

    nonStdGuardErr :: (Outputable body,
                       Anno (Stmt GhcRn body) ~ SrcSpanAnnA)
                   => [LStmtLR GhcRn GhcRn body] -> SDoc
    nonStdGuardErr :: forall body.
    (Outputable body, Anno (Stmt GhcRn body) ~ SrcSpanAnnA) =>
    [LStmtLR GhcRn GhcRn body] -> SDoc
    nonStdGuardErr [LStmtLR GhcRn GhcRn body]
    guards
      = SDoc -> Int -> SDoc -> SDoc
    hang (String -> SDoc
    text String
    "accepting non-standard pattern guards (use PatternGuards to suppress this message)")
           Int
    4 ([GenLocated SrcSpanAnnA (Stmt GhcRn body)] -> SDoc
    forall a. Outputable a => [a] -> SDoc
    interpp'SP [GenLocated SrcSpanAnnA (Stmt GhcRn body)]
    [LStmtLR GhcRn GhcRn body]
    guards)

    unusedPatBindWarn :: HsBind GhcRn -> SDoc
    unusedPatBindWarn :: HsBind GhcRn -> SDoc
    unusedPatBindWarn HsBind GhcRn
    bind
      = SDoc -> Int -> SDoc -> SDoc
    hang (String -> SDoc
    text String
    "This pattern-binding binds no variables:")
           Int
    2 (HsBind GhcRn -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr HsBind GhcRn
    bind)

    dupMinimalSigErr :: [LSig GhcPs] -> RnM ()
    dupMinimalSigErr :: [LSig GhcPs] -> TcRn ()
    dupMinimalSigErr sigs :: [LSig GhcPs]
    sigs@(L SrcSpanAnnA
    loc Sig GhcPs
    _ : [LSig GhcPs]
    _)
      = SrcSpan -> SDoc -> TcRn ()
    addErrAt (SrcSpanAnnA -> SrcSpan
    forall a. SrcSpanAnn' a -> SrcSpan
    locA SrcSpanAnnA
    loc) (SDoc -> TcRn ()) -> SDoc -> TcRn ()
    forall a b. (a -> b) -> a -> b
    $
        [SDoc] -> SDoc
    vcat [ String -> SDoc
    text String
    "Multiple minimal complete definitions"
             , String -> SDoc
    text String
    "at" SDoc -> SDoc -> SDoc
    <+> [SDoc] -> SDoc
    vcat ((SrcSpan -> SDoc) -> [SrcSpan] -> [SDoc]
    forall a b. (a -> b) -> [a] -> [b]
    map SrcSpan -> SDoc
    forall a. Outputable a => a -> SDoc
    ppr ([SrcSpan] -> [SDoc]) -> [SrcSpan] -> [SDoc]
    forall a b. (a -> b) -> a -> b
    $ (SrcSpan -> SrcSpan -> Ordering) -> [SrcSpan] -> [SrcSpan]
    forall a. (a -> a -> Ordering) -> [a] -> [a]
    sortBy SrcSpan -> SrcSpan -> Ordering
    SrcLoc.leftmost_smallest ([SrcSpan] -> [SrcSpan]) -> [SrcSpan] -> [SrcSpan]
    forall a b. (a -> b) -> a -> b
    $ (GenLocated SrcSpanAnnA (Sig GhcPs) -> SrcSpan)
    -> [GenLocated SrcSpanAnnA (Sig GhcPs)] -> [SrcSpan]
    forall a b. (a -> b) -> [a] -> [b]
    map GenLocated SrcSpanAnnA (Sig GhcPs) -> SrcSpan
    forall a e. GenLocated (SrcSpanAnn' a) e -> SrcSpan
    getLocA [GenLocated SrcSpanAnnA (Sig GhcPs)]
    [LSig GhcPs]
    sigs)
             , String -> SDoc
    text String
    "Combine alternative minimal complete definitions with `|'" ]
    dupMinimalSigErr [] = String -> TcRn ()
    forall a. String -> a
    panic String
    "dupMinimalSigErr"