%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[Name]{@Name@: to transmit name info from renamer to typechecker}
\begin{code}
-#include "HsVersions.h"
-
module Name (
- -- things for the Name NON-abstract type
- Name(..),
-
- isTyConName, isClassName, isClassOpName,
- isUnboundName, invisibleName,
-
- getTagFromClassOpName, getSynNameArity,
-
- getNameShortName, getNameFullName
-
+ -- Re-export the OccName stuff
+ module OccName,
+
+ -- The Name type
+ Name, -- Abstract
+ mkLocalName, mkSysLocalName, mkCCallName,
+ mkIPName,
+ mkGlobalName, mkKnownKeyGlobal, mkWiredInName,
+
+ nameUnique, setNameUnique,
+ nameOccName, nameModule, nameModule_maybe,
+ setNameOcc, nameRdrName, setNameModuleAndLoc,
+ toRdrName, hashName,
+ globaliseName, localiseName,
+
+ nameSrcLoc, nameIsLocallyDefined, isDllName, nameIsFrom, nameIsLocalOrFrom,
+
+ isSystemName, isLocalName, isGlobalName, isExternallyVisibleName,
+ isTyVarName,
+
+ -- Environment
+ NameEnv, mkNameEnv,
+ emptyNameEnv, unitNameEnv, nameEnvElts,
+ extendNameEnv_C, extendNameEnv, foldNameEnv, filterNameEnv,
+ plusNameEnv, plusNameEnv_C, extendNameEnv, extendNameEnvList,
+ lookupNameEnv, lookupNameEnv_NF, delFromNameEnv, elemNameEnv,
+
+
+ -- Class NamedThing and overloaded friends
+ NamedThing(..),
+ getSrcLoc, getOccString, toRdrName,
+ isFrom, isLocalOrFrom
) where
-import Ubiq{-uitous-}
-
-import NameLoop -- break Name/Id loop, Name/PprType/Id loop
+#include "HsVersions.h"
-import NameTypes
-import Outputable ( ExportFlag(..) )
-import Pretty
-import PprStyle ( PprStyle(..) )
-import SrcLoc ( mkBuiltinSrcLoc, mkUnknownSrcLoc )
-import TyCon ( TyCon, getSynTyConArity )
-import TyVar ( GenTyVar )
-import Unique ( pprUnique, Unique )
-import Util ( panic, panic#, pprPanic )
+import OccName -- All of it
+import Module ( Module, moduleName, mkVanillaModule, isHomeModule )
+import RdrName ( RdrName, mkRdrOrig, mkRdrUnqual, rdrNameOcc, rdrNameModule )
+import CmdLineOpts ( opt_Static )
+import SrcLoc ( builtinSrcLoc, noSrcLoc, SrcLoc )
+import Unique ( Unique, Uniquable(..), u2i, pprUnique, pprUnique10 )
+import FastTypes
+import Maybes ( expectJust )
+import UniqFM
+import Outputable
\end{code}
%************************************************************************
%* *
-\subsection[Name-datatype]{The @Name@ datatype}
+\subsection[Name-datatype]{The @Name@ datatype, and name construction}
%* *
%************************************************************************
-
+
\begin{code}
-data Name
- = Short Unique -- Local ids and type variables
- ShortName
-
- -- Nano-prelude things; truly wired in.
- -- Includes all type constructors and their associated data constructors
- | WiredInTyCon TyCon
- | WiredInVal Id
-
- | TyConName Unique -- TyCons other than Prelude ones; need to
- FullName -- separate these because we want to pin on
- Arity -- their arity.
- Bool -- False <=> `type',
- -- True <=> `data' or `newtype'
- [Name] -- List of user-visible data constructors;
- -- NB: for `data' types only.
- -- Used in checking import/export lists.
-
- | ClassName Unique
- FullName
- [Name] -- List of class methods; used for checking
- -- import/export lists.
-
- | ValName Unique -- Top level id
- FullName
-
- | ClassOpName Unique
- Name -- Name associated w/ the defined class
- -- (can get unique and export info, etc., from this)
- FAST_STRING -- The class operation
- Int -- Unique tag within the class
-
- -- Miscellaneous
- | Unbound FAST_STRING -- Placeholder for a name which isn't in scope
- -- Used only so that the renamer can carry on after
- -- finding an unbound identifier.
- -- The string is grabbed from the unbound name, for
- -- debugging information only.
+data Name = Name {
+ n_sort :: NameSort, -- What sort of name it is
+ n_occ :: OccName, -- Its occurrence name
+ n_uniq :: Unique,
+ n_loc :: SrcLoc -- Definition site
+ }
+
+data NameSort
+ = Global Module -- (a) TyCon, Class, their derived Ids, dfun Id
+ -- (b) Imported Id
+ -- (c) Top-level Id in the original source, even if
+ -- locally defined
+
+ | Local -- A user-defined Id or TyVar
+ -- defined in the module being compiled
+
+ | System -- A system-defined Id or TyVar. Typically the
+ -- OccName is very uninformative (like 's')
\end{code}
-These @is..@ functions are used in the renamer to check that (eg) a tycon
-is seen in a context which demands one.
+Notes about the NameSorts:
+
+1. Initially, top-level Ids (including locally-defined ones) get Global names,
+ and all other local Ids get Local names
+
+2. Things with a @Global@ name are given C static labels, so they finally
+ appear in the .o file's symbol table. They appear in the symbol table
+ in the form M.n. If originally-local things have this property they
+ must be made @Global@ first.
+
+3. In the tidy-core phase, a Global that is not visible to an importer
+ is changed to Local, and a Local that is visible is changed to Global
+
+4. A System Name differs in the following ways:
+ a) has unique attached when printing dumps
+ b) unifier eliminates sys tyvars in favour of user provs where possible
+
+ Before anything gets printed in interface files or output code, it's
+ fed through a 'tidy' processor, which zaps the OccNames to have
+ unique names; and converts all sys-locals to user locals
+ If any desugarer sys-locals have survived that far, they get changed to
+ "ds1", "ds2", etc.
\begin{code}
-isTyConName, isClassName, isUnboundName :: Name -> Bool
+nameUnique :: Name -> Unique
+nameOccName :: Name -> OccName
+nameModule :: Name -> Module
+nameSrcLoc :: Name -> SrcLoc
-isTyConName (TyConName _ _ _ _ _) = True
-isTyConName (WiredInTyCon _) = True
-isTyConName other = False
+nameUnique name = n_uniq name
+nameOccName name = n_occ name
+nameSrcLoc name = n_loc name
-isClassName (ClassName _ _ _) = True
-isClassName other = False
+nameModule (Name { n_sort = Global mod }) = mod
+nameModule name = pprPanic "nameModule" (ppr name)
-isUnboundName (Unbound _) = True
-isUnboundName other = False
+nameModule_maybe (Name { n_sort = Global mod }) = Just mod
+nameModule_maybe name = Nothing
\end{code}
-@isClassOpName@ is a little cleverer: it checks to see whether the
-class op comes from the correct class.
-
\begin{code}
-isClassOpName :: Name -- The name of the class expected for this op
- -> Name -- The name of the thing which should be a class op
- -> Bool
+nameIsLocallyDefined :: Name -> Bool
+nameIsFrom :: Module -> Name -> Bool
+nameIsLocalOrFrom :: Module -> Name -> Bool
+isLocalName :: Name -> Bool -- Not globals
+isGlobalName :: Name -> Bool
+isSystemName :: Name -> Bool
+isExternallyVisibleName :: Name -> Bool
+
+isGlobalName (Name {n_sort = Global _}) = True
+isGlobalName other = False
+
+isLocalName name = not (isGlobalName name)
-isClassOpName (ClassName uniq1 _ _) (ClassOpName _ (ClassName uniq2 _ _) _ _)
- = uniq1 == uniq2
-isClassOpName other_class other_op = False
+nameIsLocallyDefined name = isLocalName name
+
+nameIsLocalOrFrom from (Name {n_sort = Global mod}) = mod == from
+nameIsLocalOrFrom from other = True
+
+nameIsFrom from (Name {n_sort = Global mod}) = mod == from
+nameIsFrom from other = pprPanic "nameIsFrom" (ppr other)
+
+-- Global names are by definition those that are visible
+-- outside the module, *as seen by the linker*. Externally visible
+-- does not mean visible at the source level
+isExternallyVisibleName name = isGlobalName name
+
+isSystemName (Name {n_sort = System}) = True
+isSystemName other = False
\end{code}
-A Name is ``invisible'' if the user has no business seeing it; e.g., a
-data-constructor for an abstract data type (but whose constructors are
-known because of a pragma).
+
+%************************************************************************
+%* *
+\subsection{Making names}
+%* *
+%************************************************************************
+
\begin{code}
-invisibleName :: Name -> Bool
+mkLocalName :: Unique -> OccName -> SrcLoc -> Name
+mkLocalName uniq occ loc = Name { n_uniq = uniq, n_sort = Local, n_occ = occ, n_loc = loc }
+ -- NB: You might worry that after lots of huffing and
+ -- puffing we might end up with two local names with distinct
+ -- uniques, but the same OccName. Indeed we can, but that's ok
+ -- * the insides of the compiler don't care: they use the Unique
+ -- * when printing for -ddump-xxx you can switch on -dppr-debug to get the
+ -- uniques if you get confused
+ -- * for interface files we tidyCore first, which puts the uniques
+ -- into the print name (see setNameVisibility below)
+
+mkGlobalName :: Unique -> Module -> OccName -> SrcLoc -> Name
+mkGlobalName uniq mod occ loc = Name { n_uniq = uniq, n_sort = Global mod,
+ n_occ = occ, n_loc = loc }
+
+mkKnownKeyGlobal :: RdrName -> Unique -> Name
+mkKnownKeyGlobal rdr_name uniq
+ = mkGlobalName uniq (mkVanillaModule (rdrNameModule rdr_name))
+ (rdrNameOcc rdr_name)
+ builtinSrcLoc
+
+mkWiredInName :: Module -> OccName -> Unique -> Name
+mkWiredInName mod occ uniq = mkGlobalName uniq mod occ builtinSrcLoc
+
+mkSysLocalName :: Unique -> UserFS -> Name
+mkSysLocalName uniq fs = Name { n_uniq = uniq, n_sort = System,
+ n_occ = mkVarOcc fs, n_loc = noSrcLoc }
+
+mkCCallName :: Unique -> EncodedString -> Name
+ -- The encoded string completely describes the ccall
+mkCCallName uniq str = Name { n_uniq = uniq, n_sort = Local,
+ n_occ = mkCCallOcc str, n_loc = noSrcLoc }
+
+mkIPName :: Unique -> OccName -> Name
+mkIPName uniq occ
+ = Name { n_uniq = uniq,
+ n_sort = Local,
+ n_occ = occ,
+ n_loc = noSrcLoc }
+\end{code}
-invisibleName (TyConName _ n _ _ _) = invisibleFullName n
-invisibleName (ClassName _ n _) = invisibleFullName n
-invisibleName (ValName _ n) = invisibleFullName n
-invisibleName _ = False
+\begin{code}
+-- When we renumber/rename things, we need to be
+-- able to change a Name's Unique to match the cached
+-- one in the thing it's the name of. If you know what I mean.
+setNameUnique name uniq = name {n_uniq = uniq}
+
+setNameOcc :: Name -> OccName -> Name
+setNameOcc name occ = name {n_occ = occ}
+
+globaliseName :: Name -> Module -> Name
+globaliseName n mod = n { n_sort = Global mod }
+
+localiseName :: Name -> Name
+localiseName n = n { n_sort = Local }
+
+setNameModuleAndLoc :: Name -> Module -> SrcLoc -> Name
+setNameModuleAndLoc name mod loc = name {n_sort = set (n_sort name), n_loc = loc}
+ where
+ set (Global _) = Global mod
\end{code}
+
+%************************************************************************
+%* *
+\subsection{Predicates and selectors}
+%* *
+%************************************************************************
+
\begin{code}
-getTagFromClassOpName :: Name -> Int
-getTagFromClassOpName (ClassOpName _ _ _ tag) = tag
+hashName :: Name -> Int
+hashName name = iBox (u2i (nameUnique name))
+
+
+nameRdrName :: Name -> RdrName
+-- Makes a qualified name for top-level (Global) names, whether locally defined or not
+-- and an unqualified name just for Locals
+nameRdrName (Name { n_occ = occ, n_sort = Global mod }) = mkRdrOrig (moduleName mod) occ
+nameRdrName (Name { n_occ = occ }) = mkRdrUnqual occ
-getSynNameArity :: Name -> Maybe Arity
-getSynNameArity (TyConName _ _ arity False{-syn-} _) = Just arity
-getSynNameArity (WiredInTyCon tycon) = getSynTyConArity tycon
-getSynNameArity other_name = Nothing
+isDllName :: Name -> Bool
+ -- Does this name refer to something in a different DLL?
+isDllName nm = not opt_Static &&
+ not (isLocalName nm) && -- isLocalName test needed 'cos
+ not (isHomeModule (nameModule nm)) -- nameModule won't work on local names
-getNameShortName :: Name -> ShortName
-getNameShortName (Short _ sn) = sn
-getNameFullName :: Name -> FullName
-getNameFullName n = get_nm "getNameFullName" n
+
+isTyVarName :: Name -> Bool
+isTyVarName name = isTvOcc (nameOccName name)
\end{code}
%************************************************************************
\begin{code}
-cmpName n1 n2 = c n1 n2
- where
- c (Short u1 _) (Short u2 _) = cmp u1 u2
-
- c (WiredInTyCon tc1) (WiredInTyCon tc2) = cmp tc1 tc2
- c (WiredInVal id1) (WiredInVal id2) = cmp id1 id2
-
- c (TyConName u1 _ _ _ _) (TyConName u2 _ _ _ _) = cmp u1 u2
- c (ClassName u1 _ _) (ClassName u2 _ _) = cmp u1 u2
- c (ValName u1 _) (ValName u2 _) = cmp u1 u2
-
- c (ClassOpName u1 _ _ _) (ClassOpName u2 _ _ _) = cmp u1 u2
- c (Unbound a) (Unbound b) = panic# "Eq.Name.Unbound"
-
- c other_1 other_2 -- the tags *must* be different
- = let tag1 = tag_Name n1
- tag2 = tag_Name n2
- in
- if tag1 _LT_ tag2 then LT_ else GT_
-
- tag_Name (Short _ _) = (ILIT(1) :: FAST_INT)
- tag_Name (WiredInTyCon _) = ILIT(2)
- tag_Name (WiredInVal _) = ILIT(3)
- tag_Name (TyConName _ _ _ _ _) = ILIT(7)
- tag_Name (ClassName _ _ _) = ILIT(8)
- tag_Name (ValName _ _) = ILIT(9)
- tag_Name (ClassOpName _ _ _ _) = ILIT(10)
- tag_Name (Unbound _) = ILIT(11)
+cmpName n1 n2 = n_uniq n1 `compare` n_uniq n2
\end{code}
\begin{code}
instance Eq Name where
- a == b = case (a `cmp` b) of { EQ_ -> True; _ -> False }
- a /= b = case (a `cmp` b) of { EQ_ -> False; _ -> True }
+ a == b = case (a `compare` b) of { EQ -> True; _ -> False }
+ a /= b = case (a `compare` b) of { EQ -> False; _ -> True }
instance Ord Name where
- a <= b = case (a `cmp` b) of { LT_ -> True; EQ_ -> True; GT__ -> False }
- a < b = case (a `cmp` b) of { LT_ -> True; EQ_ -> False; GT__ -> False }
- a >= b = case (a `cmp` b) of { LT_ -> False; EQ_ -> True; GT__ -> True }
- a > b = case (a `cmp` b) of { LT_ -> False; EQ_ -> False; GT__ -> True }
+ a <= b = case (a `compare` b) of { LT -> True; EQ -> True; GT -> False }
+ a < b = case (a `compare` b) of { LT -> True; EQ -> False; GT -> False }
+ a >= b = case (a `compare` b) of { LT -> False; EQ -> True; GT -> True }
+ a > b = case (a `compare` b) of { LT -> False; EQ -> False; GT -> True }
+ compare a b = cmpName a b
-instance Ord3 Name where
- cmp = cmpName
-\end{code}
+instance Uniquable Name where
+ getUnique = nameUnique
-\begin{code}
instance NamedThing Name where
- getExportFlag (Short _ _) = NotExported
- getExportFlag (WiredInTyCon _) = NotExported -- compiler always know about these
- getExportFlag (WiredInVal _) = NotExported
- getExportFlag (ClassOpName _ c _ _) = getExportFlag c
- getExportFlag other = getExportFlag (get_nm "getExportFlag" other)
-
- isLocallyDefined (Short _ _) = True
- isLocallyDefined (WiredInTyCon _) = False
- isLocallyDefined (WiredInVal _) = False
- isLocallyDefined (ClassOpName _ c _ _) = isLocallyDefined c
- isLocallyDefined other = isLocallyDefined (get_nm "isLocallyDefined" other)
-
- getOrigName (Short _ sn) = getOrigName sn
- getOrigName (WiredInTyCon tc) = getOrigName tc
- getOrigName (WiredInVal id) = getOrigName id
- getOrigName (ClassOpName _ c op _) = (fst (getOrigName c), op)
- getOrigName other = getOrigName (get_nm "getOrigName" other)
-
- getOccurrenceName (Short _ sn) = getOccurrenceName sn
- getOccurrenceName (WiredInTyCon tc) = getOccurrenceName tc
- getOccurrenceName (WiredInVal id) = getOccurrenceName id
- getOccurrenceName (ClassOpName _ _ op _) = op
- getOccurrenceName (Unbound s) = s _APPEND_ SLIT("<unbound>")
- getOccurrenceName other = getOccurrenceName (get_nm "getOccurrenceName" other)
-
- getInformingModules thing = panic "getInformingModule:Name"
-
- getSrcLoc (Short _ sn) = getSrcLoc sn
- getSrcLoc (WiredInTyCon tc) = mkBuiltinSrcLoc
- getSrcLoc (WiredInVal id) = mkBuiltinSrcLoc
- getSrcLoc (ClassOpName _ c _ _) = getSrcLoc c
- getSrcLoc (Unbound _) = mkUnknownSrcLoc
- getSrcLoc other = getSrcLoc (get_nm "getSrcLoc" other)
-
- getItsUnique (Short u _) = u
- getItsUnique (WiredInTyCon t) = getItsUnique t
- getItsUnique (WiredInVal i) = getItsUnique i
- getItsUnique (TyConName u _ _ _ _) = u
- getItsUnique (ClassName u _ _) = u
- getItsUnique (ValName u _) = u
- getItsUnique (ClassOpName u _ _ _) = u
-
- fromPreludeCore (WiredInTyCon _) = True
- fromPreludeCore (WiredInVal _) = True
- fromPreludeCore (ClassOpName _ c _ _) = fromPreludeCore c
- fromPreludeCore other = False
+ getName n = n
\end{code}
-A useful utility; most emphatically not for export! (but see
-@getNameFullName@...):
+
+%************************************************************************
+%* *
+\subsection{Name environment}
+%* *
+%************************************************************************
+
\begin{code}
-get_nm :: String -> Name -> FullName
-
-get_nm msg (TyConName _ n _ _ _) = n
-get_nm msg (ClassName _ n _) = n
-get_nm msg (ValName _ n) = n
-#ifdef DEBUG
-get_nm msg other = pprPanic ("get_nm:"++msg) (ppr PprShowAll other)
--- If match failure, probably on a ClassOpName or Unbound :-(
-#endif
+type NameEnv a = UniqFM a -- Domain is Name
+
+emptyNameEnv :: NameEnv a
+mkNameEnv :: [(Name,a)] -> NameEnv a
+nameEnvElts :: NameEnv a -> [a]
+extendNameEnv_C :: (a->a->a) -> NameEnv a -> Name -> a -> NameEnv a
+extendNameEnv :: NameEnv a -> Name -> a -> NameEnv a
+plusNameEnv :: NameEnv a -> NameEnv a -> NameEnv a
+plusNameEnv_C :: (a->a->a) -> NameEnv a -> NameEnv a -> NameEnv a
+extendNameEnvList:: NameEnv a -> [(Name,a)] -> NameEnv a
+delFromNameEnv :: NameEnv a -> Name -> NameEnv a
+elemNameEnv :: Name -> NameEnv a -> Bool
+unitNameEnv :: Name -> a -> NameEnv a
+lookupNameEnv :: NameEnv a -> Name -> Maybe a
+lookupNameEnv_NF :: NameEnv a -> Name -> a
+mapNameEnv :: (a->b) -> NameEnv a -> NameEnv b
+foldNameEnv :: (a -> b -> b) -> b -> NameEnv a -> b
+filterNameEnv :: (elt -> Bool) -> NameEnv elt -> NameEnv elt
+
+emptyNameEnv = emptyUFM
+foldNameEnv = foldUFM
+mkNameEnv = listToUFM
+nameEnvElts = eltsUFM
+extendNameEnv_C = addToUFM_C
+extendNameEnv = addToUFM
+plusNameEnv = plusUFM
+plusNameEnv_C = plusUFM_C
+extendNameEnvList= addListToUFM
+delFromNameEnv = delFromUFM
+elemNameEnv = elemUFM
+mapNameEnv = mapUFM
+unitNameEnv = unitUFM
+filterNameEnv = filterUFM
+
+lookupNameEnv = lookupUFM
+lookupNameEnv_NF env n = expectJust "lookupNameEnv_NF" (lookupUFM env n)
\end{code}
+
+%************************************************************************
+%* *
+\subsection{Pretty printing}
+%* *
+%************************************************************************
+
\begin{code}
instance Outputable Name where
-#ifdef DEBUG
- ppr PprDebug (Short u s) = pp_debug u s
-
- ppr PprDebug (TyConName u n _ _ _) = pp_debug u n
- ppr PprDebug (ClassName u n _) = pp_debug u n
- ppr PprDebug (ValName u n) = pp_debug u n
-#endif
- ppr sty (Short u s) = ppr sty s
-
- ppr sty (WiredInTyCon tc) = ppr sty tc
- ppr sty (WiredInVal id) = ppr sty id
-
- ppr sty (TyConName u n a b c) = ppr sty n
- ppr sty (ClassName u n c) = ppr sty n
- ppr sty (ValName u n) = ppr sty n
-
- ppr sty (ClassOpName u c s i)
- = let
- ps = ppPStr s
- in
- case sty of
- PprForUser -> ps
- PprInterface -> ps
- PprDebug -> ps
- other -> ppBesides [ps, ppChar '{',
- ppSep [pprUnique u,
- ppStr "op", ppInt i,
- ppStr "cls", ppr sty c],
- ppChar '}']
-
- ppr sty (Unbound s) = ppStr ("*UNBOUND*"++ _UNPK_ s)
-
-pp_debug uniq thing
- = ppBesides [ppr PprDebug thing, ppStr "{-", pprUnique uniq, ppStr "-}" ]
+ -- When printing interfaces, all Locals have been given nice print-names
+ ppr name = pprName name
+
+pprName name@(Name {n_sort = sort, n_uniq = uniq, n_occ = occ})
+ = getPprStyle $ \ sty ->
+ case sort of
+ Global mod -> pprGlobal sty name uniq mod occ
+ System -> pprSysLocal sty uniq occ
+ Local -> pprLocal sty uniq occ
+
+pprGlobal sty name uniq mod occ
+ | codeStyle sty = ppr (moduleName mod) <> char '_' <> pprOccName occ
+
+ | debugStyle sty = ppr (moduleName mod) <> dot <> pprOccName occ <>
+ text "{-" <> pprUnique uniq <> text "-}"
+
+ | unqualStyle sty name = pprOccName occ
+ | otherwise = ppr (moduleName mod) <> dot <> pprOccName occ
+
+pprLocal sty uniq occ
+ | codeStyle sty = pprUnique uniq
+ | debugStyle sty = pprOccName occ <>
+ text "{-" <> pprUnique10 uniq <> text "-}"
+ | otherwise = pprOccName occ -- User and Iface styles
+
+-- Like Local, except that we only omit the unique in Iface style
+pprSysLocal sty uniq occ
+ | codeStyle sty = pprUnique uniq
+ | ifaceStyle sty = pprOccName occ -- The tidy phase has ensured that OccNames
+ -- are enough
+ | otherwise = pprOccName occ <> char '_' <> pprUnique uniq
+ -- If the tidy phase hasn't run, the OccName
+ -- is unlikely to be informative (like 's'),
+ -- so print the unique
+\end{code}
+
+%************************************************************************
+%* *
+\subsection{Overloaded functions related to Names}
+%* *
+%************************************************************************
+
+\begin{code}
+class NamedThing a where
+ getOccName :: a -> OccName
+ getName :: a -> Name
+
+ getOccName n = nameOccName (getName n) -- Default method
\end{code}
+
+\begin{code}
+getSrcLoc :: NamedThing a => a -> SrcLoc
+getOccString :: NamedThing a => a -> String
+toRdrName :: NamedThing a => a -> RdrName
+isFrom :: NamedThing a => Module -> a -> Bool
+isLocalOrFrom :: NamedThing a => Module -> a -> Bool
+
+getSrcLoc = nameSrcLoc . getName
+getOccString = occNameString . getOccName
+toRdrName = nameRdrName . getName
+isFrom mod x = nameIsFrom mod (getName x)
+isLocalOrFrom mod x = nameIsLocalOrFrom mod ( getName x)
+\end{code}
+
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