%
-% (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 (
- Module(..),
-
- RdrName(..),
- isUnqual,
- isQual,
- isRdrLexCon, isRdrLexConOrSpecial,
- appendRdr,
- showRdr,
- cmpRdr,
-
- Name,
- Provenance,
- mkLocalName, isLocalName,
- mkTopLevName, mkImportedName,
- mkImplicitName, isImplicitName,
- mkBuiltinName, mkCompoundName, mkCompoundName2,
-
- mkFunTyConName, mkTupleDataConName, mkTupleTyConName,
- mkTupNameStr,
-
- NamedThing(..), -- class
- ExportFlag(..),
- isExported{-overloaded-}, exportFlagOn{-not-},
-
- nameUnique, changeUnique,
- nameOccName,
- nameOrigName,
- nameExportFlag,
- nameSrcLoc,
- nameImpLocs,
- nameImportFlag,
- isLocallyDefinedName,
- isPreludeDefinedName,
-
- origName, moduleOf, nameOf, moduleNamePair,
- getOccName, getExportFlag,
- getSrcLoc, getImpLocs,
- isLocallyDefined, isPreludeDefined,
- getLocalName, ltLexical,
-
- isSymLexeme, pprSym, pprNonSym,
- isLexCon, isLexVar, isLexId, isLexSym, isLexSpecialSym,
- isLexConId, isLexConSym, isLexVarId, isLexVarSym
+ -- Re-export the OccName stuff
+ module OccName,
+
+ -- The Name type
+ Name, -- Abstract
+ BuiltInSyntax(..),
+ mkInternalName, mkSystemName,
+ mkSystemNameEncoded, mkSysTvName,
+ mkFCallName, mkIPName,
+ mkExternalName, mkWiredInName,
+
+ nameUnique, setNameUnique,
+ nameOccName, nameModule, nameModule_maybe, nameModuleName,
+ setNameOcc,
+ hashName, localiseName,
+
+ nameSrcLoc, nameParent, nameParent_maybe,
+
+ isSystemName, isInternalName, isExternalName,
+ isTyVarName, isDllName, isWiredInName, isBuiltInSyntax,
+ wiredInNameTyThing_maybe,
+ nameIsLocalOrFrom, isHomePackageName,
+
+ -- Class NamedThing and overloaded friends
+ NamedThing(..),
+ getSrcLoc, getOccString
) where
-import Ubiq
-
-import CStrings ( identToC, cSEP )
-import Outputable ( Outputable(..) )
-import PprStyle ( PprStyle(..), codeStyle )
-import PrelMods ( pRELUDE, pRELUDE_BUILTIN, fromPrelude )
-import Pretty
-import SrcLoc ( mkBuiltinSrcLoc, mkUnknownSrcLoc )
-import Unique ( funTyConKey, mkTupleDataConUnique, mkTupleTyConUnique,
- pprUnique, Unique
- )
-import Util ( thenCmp, _CMP_STRING_, nOfThem, panic, assertPanic )
+#include "HsVersions.h"
+
+import {-# SOURCE #-} TypeRep( TyThing )
+
+import OccName -- All of it
+import Module ( Module, ModuleName, moduleName, isHomeModule )
+import CmdLineOpts ( opt_Static )
+import SrcLoc ( noSrcLoc, wiredInSrcLoc, SrcLoc )
+import Unique ( Unique, Uniquable(..), getKey, pprUnique )
+import Maybes ( orElse )
+import FastTypes
+import Outputable
\end{code}
%************************************************************************
%* *
-\subsection[RdrName]{The @RdrName@ datatype; names read from files}
+\subsection[Name-datatype]{The @Name@ datatype, and name construction}
%* *
%************************************************************************
+
+\begin{code}
+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
+ }
+
+-- NOTE: we make the n_loc field strict to eliminate some potential
+-- (and real!) space leaks, due to the fact that we don't look at
+-- the SrcLoc in a Name all that often.
+
+data NameSort
+ = External Module (Maybe Name)
+ -- (Just parent) => this Name is a subordinate name of 'parent'
+ -- e.g. data constructor of a data type, method of a class
+ -- Nothing => not a subordinate
+
+ | WiredIn Module (Maybe Name) TyThing BuiltInSyntax
+ -- A variant of External, for wired-in things
+
+ | Internal -- 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')
+
+data BuiltInSyntax = BuiltInSyntax | UserSyntax
+-- BuiltInSyntax is for things like (:), [], tuples etc,
+-- which have special syntactic forms. They aren't "in scope"
+-- as such.
+\end{code}
+
+Notes about the NameSorts:
+
+1. Initially, top-level Ids (including locally-defined ones) get External names,
+ and all other local Ids get Internal names
+
+2. Things with a External 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 @External@ first.
+
+3. In the tidy-core phase, a External that is not visible to an importer
+ is changed to Internal, and a Internal that is visible is changed to External
+
+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.
+
+Built-in syntax => It's a syntactic form, not "in scope" (e.g. [])
+
+Wired-in thing => The thing (Id, TyCon) is fully known to the compiler,
+ not read from an interface file.
+ E.g. Bool, True, Int, Float, and many others
+
+All built-in syntax is for wired-in things.
\begin{code}
-type Module = FAST_STRING
+nameUnique :: Name -> Unique
+nameOccName :: Name -> OccName
+nameModule :: Name -> Module
+nameModuleName :: Name -> ModuleName
+nameSrcLoc :: Name -> SrcLoc
+
+nameUnique name = n_uniq name
+nameOccName name = n_occ name
+nameSrcLoc name = n_loc name
+\end{code}
-data RdrName
- = Unqual FAST_STRING
- | Qual Module FAST_STRING
+\begin{code}
+nameIsLocalOrFrom :: Module -> Name -> Bool
+isInternalName :: Name -> Bool
+isExternalName :: Name -> Bool
+isSystemName :: Name -> Bool
+isHomePackageName :: Name -> Bool
+isWiredInName :: Name -> Bool
-isUnqual (Unqual _) = True
-isUnqual (Qual _ _) = False
+isWiredInName (Name {n_sort = WiredIn _ _ _ _}) = True
+isWiredInName other = False
-isQual (Unqual _) = False
-isQual (Qual _ _) = True
+wiredInNameTyThing_maybe :: Name -> Maybe TyThing
+wiredInNameTyThing_maybe (Name {n_sort = WiredIn _ _ thing _}) = Just thing
+wiredInNameTyThing_maybe other = Nothing
-isRdrLexCon (Unqual n) = isLexCon n
-isRdrLexCon (Qual m n) = isLexCon n
+isBuiltInSyntax (Name {n_sort = WiredIn _ _ _ BuiltInSyntax}) = True
+isBuiltInSyntax other = False
-isRdrLexConOrSpecial (Unqual n) = isLexCon n || isLexSpecialSym n
-isRdrLexConOrSpecial (Qual m n) = isLexCon n || isLexSpecialSym n
+isExternalName (Name {n_sort = External _ _}) = True
+isExternalName (Name {n_sort = WiredIn _ _ _ _}) = True
+isExternalName other = False
-appendRdr (Unqual n) str = Unqual (n _APPEND_ str)
-appendRdr (Qual m n) str = ASSERT(not (fromPrelude m))
- Qual m (n _APPEND_ str)
+isInternalName name = not (isExternalName name)
-cmpRdr (Unqual n1) (Unqual n2) = _CMP_STRING_ n1 n2
-cmpRdr (Unqual n1) (Qual m2 n2) = LT_
-cmpRdr (Qual m1 n1) (Unqual n2) = GT_
-cmpRdr (Qual m1 n1) (Qual m2 n2) = _CMP_STRING_ m1 m2 `thenCmp` _CMP_STRING_ n1 n2
+nameParent_maybe :: Name -> Maybe Name
+nameParent_maybe (Name {n_sort = External _ p}) = p
+nameParent_maybe (Name {n_sort = WiredIn _ p _ _}) = p
+nameParent_maybe other = Nothing
-instance Eq RdrName where
- a == b = case (a `cmp` b) of { EQ_ -> True; _ -> False }
- a /= b = case (a `cmp` b) of { EQ_ -> False; _ -> True }
+nameParent :: Name -> Name
+nameParent name = case nameParent_maybe name of
+ Just parent -> parent
+ Nothing -> name
-instance Ord RdrName 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 }
+nameModule name = nameModule_maybe name `orElse` pprPanic "nameModule" (ppr name)
+nameModuleName name = moduleName (nameModule name)
-instance Ord3 RdrName where
- cmp = cmpRdr
+nameModule_maybe (Name { n_sort = External mod _}) = Just mod
+nameModule_maybe (Name { n_sort = WiredIn mod _ _ _}) = Just mod
+nameModule_maybe name = Nothing
-instance NamedThing RdrName where
- -- We're sorta faking it here
- getName rdr_name
- = Global u rdr_name prov ex [rdr_name]
- where
- u = panic "NamedThing.RdrName:Unique"
- prov = panic "NamedThing.RdrName:Provenance"
- ex = panic "NamedThing.RdrName:ExportFlag"
+nameIsLocalOrFrom from name
+ | isExternalName name = from == nameModule name
+ | otherwise = True
-instance Outputable RdrName where
- ppr sty (Unqual n) = pp_name sty n
- ppr sty (Qual m n) = ppBeside (pp_mod sty m) (pp_name sty n)
+isHomePackageName name
+ | isExternalName name = isHomeModule (nameModule name)
+ | otherwise = True -- Internal and system names
-pp_mod PprForC m = ppBesides [identToC m, ppPStr cSEP]
-pp_mod (PprForAsm False _) m = ppBesides [identToC m, ppPStr cSEP]
-pp_mod (PprForAsm True _) m = ppBesides [ppPStr cSEP, identToC m, ppPStr cSEP]
-pp_mod _ m = ppBesides [ppPStr m, ppChar '.']
+isDllName :: Name -> Bool -- Does this name refer to something in a different DLL?
+isDllName nm = not opt_Static && not (isHomePackageName nm)
-pp_name sty n | codeStyle sty = identToC n
- | otherwise = ppPStr n
+isTyVarName :: Name -> Bool
+isTyVarName name = isTvOcc (nameOccName name)
-showRdr sty rdr = ppShow 100 (ppr sty rdr)
+isSystemName (Name {n_sort = System}) = True
+isSystemName other = False
\end{code}
+
%************************************************************************
%* *
-\subsection[Name-datatype]{The @Name@ datatype}
+\subsection{Making names}
%* *
%************************************************************************
\begin{code}
-data Name
- = Local Unique
- FAST_STRING
- Bool -- True <=> emphasize Unique when
- -- printing; this is just an esthetic thing...
- SrcLoc
-
- | Global Unique
- RdrName -- original name; Unqual => prelude
- Provenance -- where it came from
- ExportFlag -- is it exported?
- [RdrName] -- ordered occurrence names (usually just one);
- -- first may be *un*qual.
-
-data Provenance
- = LocalDef SrcLoc -- locally defined; give its source location
-
- | Imported ExportFlag -- how it was imported
- SrcLoc -- *original* source location
- [SrcLoc] -- any import source location(s)
-
- | Implicit
- | Builtin
+mkInternalName :: Unique -> OccName -> SrcLoc -> Name
+mkInternalName uniq occ loc = Name { n_uniq = uniq, n_sort = Internal, 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)
+
+mkExternalName :: Unique -> Module -> OccName -> Maybe Name -> SrcLoc -> Name
+mkExternalName uniq mod occ mb_parent loc
+ = Name { n_uniq = uniq, n_sort = External mod mb_parent,
+ n_occ = occ, n_loc = loc }
+
+mkWiredInName :: Module -> OccName -> Unique
+ -> Maybe Name -> TyThing -> BuiltInSyntax -> Name
+mkWiredInName mod occ uniq mb_parent thing built_in
+ = Name { n_uniq = uniq,
+ n_sort = WiredIn mod mb_parent thing built_in,
+ n_occ = occ, n_loc = wiredInSrcLoc }
+
+mkSystemName :: Unique -> UserFS -> Name
+mkSystemName uniq fs = Name { n_uniq = uniq, n_sort = System,
+ n_occ = mkVarOcc fs, n_loc = noSrcLoc }
+
+-- Use this version when the string is already encoded. Avoids duplicating
+-- the string each time a new name is created.
+mkSystemNameEncoded :: Unique -> EncodedFS -> Name
+mkSystemNameEncoded uniq fs = Name { n_uniq = uniq, n_sort = System,
+ n_occ = mkSysOccFS varName fs,
+ n_loc = noSrcLoc }
+
+mkSysTvName :: Unique -> EncodedFS -> Name
+mkSysTvName uniq fs = Name { n_uniq = uniq, n_sort = System,
+ n_occ = mkSysOccFS tvName fs,
+ n_loc = noSrcLoc }
+
+mkFCallName :: Unique -> EncodedString -> Name
+ -- The encoded string completely describes the ccall
+mkFCallName uniq str = Name { n_uniq = uniq, n_sort = Internal,
+ n_occ = mkFCallOcc str, n_loc = noSrcLoc }
+
+mkIPName :: Unique -> OccName -> Name
+mkIPName uniq occ
+ = Name { n_uniq = uniq,
+ n_sort = Internal,
+ n_occ = occ,
+ n_loc = noSrcLoc }
\end{code}
\begin{code}
-mkLocalName = Local
-
-mkTopLevName u orig locn exp occs = Global u orig (LocalDef locn) exp occs
-mkImportedName u orig imp locn imp_locs exp occs = Global u orig (Imported imp locn imp_locs) exp occs
-
-mkImplicitName :: Unique -> RdrName -> Name
-mkImplicitName u o = Global u o Implicit NotExported []
-
-mkBuiltinName :: Unique -> Module -> FAST_STRING -> Name
-mkBuiltinName u m n
- = Global u (if fromPrelude m then Unqual n else Qual m n) Builtin NotExported []
-
-mkCompoundName :: Unique
- -> FAST_STRING -- indicates what kind of compound thing it is (e.g., "sdsel")
- -> [RdrName] -- "dot" these names together
- -> Name -- from which we get provenance, etc....
- -> Name -- result!
-
-mkCompoundName u str ns (Local _ _ _ _) = panic "mkCompoundName:Local?"
-mkCompoundName u str ns (Global _ _ prov exp _)
- = Global u (Unqual{-???-} (_CONCAT_ (glue ns [str]))) prov exp []
-
-glue [] acc = reverse acc
-glue (Unqual n:ns) acc = glue ns (_CONS_ '.' n : acc)
-glue (Qual m n:ns) acc = glue ns (_CONS_ '.' n : _CONS_ '.' m : acc)
-
--- this ugly one is used for instance-y things
-mkCompoundName2 :: Unique
- -> FAST_STRING -- indicates what kind of compound thing it is (e.g., "sdsel")
- -> [RdrName] -- "dot" these names together
- -> [FAST_STRING] -- type-name strings
- -> Bool -- True <=> defined in this module
- -> SrcLoc
- -> Name -- result!
-
-mkCompoundName2 u str ns ty_strs from_here locn
- = Global u (Unqual{-???-} ((_CONCAT_ (glue ns [str])) _APPEND_ (_CONS_ '.' (_CONCAT_ ty_strs))))
- (if from_here then LocalDef locn else Imported ExportAll locn [])
- ExportAll{-instances-}
- []
-
-mkFunTyConName
- = mkBuiltinName funTyConKey pRELUDE_BUILTIN SLIT("->")
-mkTupleDataConName arity
- = mkBuiltinName (mkTupleDataConUnique arity) pRELUDE_BUILTIN (mkTupNameStr arity)
-mkTupleTyConName arity
- = mkBuiltinName (mkTupleTyConUnique arity) pRELUDE_BUILTIN (mkTupNameStr arity)
-
-mkTupNameStr 0 = SLIT("()")
-mkTupNameStr 1 = panic "Name.mkTupNameStr: 1 ???"
-mkTupNameStr 2 = SLIT("(,)") -- not strictly necessary
-mkTupNameStr 3 = SLIT("(,,)") -- ditto
-mkTupNameStr 4 = SLIT("(,,,)") -- ditto
-mkTupNameStr n
- = _PK_ ("(" ++ nOfThem (n-1) ',' ++ ")")
-
- -- ToDo: what about module ???
- -- ToDo: exported when compiling builtin ???
-
-isLocalName (Local _ _ _ _) = True
-isLocalName _ = False
-
-isImplicitName (Global _ _ Implicit _ _) = True
-isImplicitName _ = False
-
-isBuiltinName (Global _ _ Builtin _ _) = True
-isBuiltinName _ = False
-\end{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}
+
+localiseName :: Name -> Name
+localiseName n = n { n_sort = Internal }
+\end{code}
%************************************************************************
%* *
-\subsection[Name-instances]{Instance declarations}
+\subsection{Predicates and selectors}
%* *
%************************************************************************
\begin{code}
-cmpName n1 n2 = c n1 n2
- where
- c (Local u1 _ _ _) (Local u2 _ _ _) = cmp u1 u2
- c (Global u1 _ _ _ _) (Global u2 _ _ _ _) = cmp u1 u2
+hashName :: Name -> Int
+hashName name = getKey (nameUnique name)
+\end{code}
- 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 (Local _ _ _ _) = (ILIT(1) :: FAST_INT)
- tag_Name (Global _ _ _ _ _) = ILIT(2)
+%************************************************************************
+%* *
+\subsection[Name-instances]{Instance declarations}
+%* *
+%************************************************************************
+
+\begin{code}
+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 }
-
-instance Ord3 Name where
- cmp = cmpName
+ 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 Uniquable Name where
- uniqueOf = nameUnique
+ getUnique = nameUnique
instance NamedThing Name where
getName n = n
\end{code}
-\begin{code}
-nameUnique (Local u _ _ _) = u
-nameUnique (Global u _ _ _ _) = u
-
--- 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.
-changeUnique (Local _ n b l) u = Local u n b l
-changeUnique n@(Global _ o p e os) u = ASSERT(not (isBuiltinName n))
- Global u o p e os
-
-nameOrigName (Local _ n _ _) = Unqual n
-nameOrigName (Global _ orig _ _ _) = orig
-
-nameModuleNamePair (Local _ n _ _) = (panic "nameModuleNamePair", n)
-nameModuleNamePair (Global _ (Unqual n) _ _ _) = (pRELUDE, n)
-nameModuleNamePair (Global _ (Qual m n) _ _ _) = (m, n)
-
-nameOccName (Local _ n _ _) = Unqual n
-nameOccName (Global _ orig _ _ [] ) = orig
-nameOccName (Global _ orig _ _ occs) = head occs
-
-nameExportFlag (Local _ _ _ _) = NotExported
-nameExportFlag (Global _ _ _ exp _) = exp
-
-nameSrcLoc (Local _ _ _ loc) = loc
-nameSrcLoc (Global _ _ (LocalDef loc) _ _) = loc
-nameSrcLoc (Global _ _ (Imported _ loc _) _ _) = loc
-nameSrcLoc (Global _ _ Implicit _ _) = mkUnknownSrcLoc
-nameSrcLoc (Global _ _ Builtin _ _) = mkBuiltinSrcLoc
-
-nameImpLocs (Global _ _ (Imported _ _ locs) _ _) = locs
-nameImpLocs _ = []
-
-nameImportFlag (Local _ _ _ _) = NotExported
-nameImportFlag (Global _ _ (LocalDef _) _ _) = ExportAll
-nameImportFlag (Global _ _ (Imported exp _ _) _ _) = exp
-nameImportFlag (Global _ _ Implicit _ _) = ExportAll
-nameImportFlag (Global _ _ Builtin _ _) = ExportAll
-
-isLocallyDefinedName (Local _ _ _ _) = True
-isLocallyDefinedName (Global _ _ (LocalDef _) _ _) = True
-isLocallyDefinedName (Global _ _ (Imported _ _ _) _ _) = False
-isLocallyDefinedName (Global _ _ Implicit _ _) = False
-isLocallyDefinedName (Global _ _ Builtin _ _) = False
-
-isPreludeDefinedName (Local _ n _ _) = False
-isPreludeDefinedName (Global _ orig _ _ _) = isUnqual orig
-\end{code}
-
-\begin{code}
-instance Outputable Name where
- ppr sty (Local u n emph_uniq _)
- | codeStyle sty = pprUnique u
- | emph_uniq = ppBesides [pprUnique u, ppStr "{-", ppPStr n, ppStr "-}"]
- | otherwise = ppBesides [ppPStr n, ppStr "{-", pprUnique u, ppStr "-}"]
-
- ppr PprDebug (Global u o _ _ _) = ppBesides [ppr PprDebug o, ppStr "{-", pprUnique u, ppStr "-}"]
- ppr PprForUser (Global u o _ _ [] ) = ppr PprForUser o
- ppr PprForUser (Global u o _ _ occs) = ppr PprForUser (head occs)
- ppr PprShowAll (Global u o prov exp occs) = pp_all o prov exp occs
- ppr sty (Global u o _ _ _) = ppr sty o
-
-pp_all orig prov exp occs
- = ppBesides [ppr PprShowAll orig, ppr PprShowAll occs, pp_prov prov, pp_exp exp]
-
-pp_exp NotExported = ppNil
-pp_exp ExportAll = ppPStr SLIT("/EXP(..)")
-pp_exp ExportAbs = ppPStr SLIT("/EXP")
-
-pp_prov Implicit = ppPStr SLIT("/IMPLICIT")
-pp_prov Builtin = ppPStr SLIT("/BUILTIN")
-pp_prov _ = ppNil
-\end{code}
%************************************************************************
%* *
-\subsection[ExportFlag-datatype]{The @ExportFlag@ datatype}
+\subsection{Pretty printing}
%* *
%************************************************************************
-The export flag @ExportAll@ means `export all there is', so there are
-times when it is attached to a class or data type which has no
-ops/constructors (if the class/type was imported abstractly). In
-fact, @ExportAll@ is attached to everything except to classes/types
-which are being {\em exported} abstractly, regardless of how they were
-imported.
-
\begin{code}
-data ExportFlag
- = ExportAll -- export with all constructors/methods
- | ExportAbs -- export abstractly (tycons/classes only)
- | NotExported
-
-exportFlagOn NotExported = False
-exportFlagOn _ = True
-
-isExported a = exportFlagOn (getExportFlag a)
+instance Outputable Name where
+ -- When printing interfaces, all Internals have been given nice print-names
+ ppr name = pprName name
+
+instance OutputableBndr Name where
+ pprBndr _ name = pprName name
+
+pprName (Name {n_sort = sort, n_uniq = uniq, n_occ = occ})
+ = getPprStyle $ \ sty ->
+ case sort of
+ WiredIn mod _ _ BuiltInSyntax -> pprOccName occ -- Built-in syntax is never qualified
+ WiredIn mod _ _ UserSyntax -> pprExternal sty uniq mod occ True
+ External mod _ -> pprExternal sty uniq mod occ False
+ System -> pprSystem sty uniq occ
+ Internal -> pprInternal sty uniq occ
+
+pprExternal sty uniq mod occ is_wired
+ | unqualStyle sty mod_name occ = pprOccName occ
+ | codeStyle sty = ppr mod_name <> char '_' <> pprOccName occ
+ | debugStyle sty = sep [ppr mod_name <> dot <> pprOccName occ,
+ hsep [text "{-"
+ , if is_wired then ptext SLIT("(w)") else empty
+ , pprUnique uniq
+-- (overkill) , case mb_p of
+-- Nothing -> empty
+-- Just n -> brackets (ppr n)
+ , text "-}"]]
+ | otherwise = ppr mod_name <> dot <> pprOccName occ
+ where
+ mod_name = moduleName mod
+
+pprInternal sty uniq occ
+ | codeStyle sty = pprUnique uniq
+ | debugStyle sty = pprOccName occ <> text "{-" <> pprUnique uniq <> text "-}"
+ | otherwise = pprOccName occ -- User style
+
+-- Like Internal, except that we only omit the unique in Iface style
+pprSystem sty uniq occ
+ | codeStyle sty = pprUnique uniq
+ | 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}
%************************************************************************
\begin{code}
class NamedThing a where
- getName :: a -> Name
+ getOccName :: a -> OccName
+ getName :: a -> Name
+
+ getOccName n = nameOccName (getName n) -- Default method
\end{code}
\begin{code}
-origName :: NamedThing a => a -> RdrName
-moduleOf :: RdrName -> Module
-nameOf :: RdrName -> FAST_STRING
-moduleNamePair :: NamedThing a => a -> (Module, FAST_STRING)
-
-getOccName :: NamedThing a => a -> RdrName
-getLocalName :: NamedThing a => a -> FAST_STRING
-getExportFlag :: NamedThing a => a -> ExportFlag
getSrcLoc :: NamedThing a => a -> SrcLoc
-getImpLocs :: NamedThing a => a -> [SrcLoc]
-isLocallyDefined :: NamedThing a => a -> Bool
-isPreludeDefined :: NamedThing a => a -> Bool
-
--- ToDo: specialise for RdrNames?
-origName = nameOrigName . getName
-moduleNamePair = nameModuleNamePair . getName
-
-moduleOf (Unqual n) = pRELUDE
-moduleOf (Qual m n) = m
-
-nameOf (Unqual n) = n
-nameOf (Qual m n) = n
+getOccString :: NamedThing a => a -> String
-getLocalName = nameOf . origName
-
-getOccName = nameOccName . getName
-getExportFlag = nameExportFlag . getName
getSrcLoc = nameSrcLoc . getName
-getImpLocs = nameImpLocs . getName
-isLocallyDefined = isLocallyDefinedName . getName
-isPreludeDefined = isPreludeDefinedName . getName
-\end{code}
-
-@ltLexical@ is used for sorting things into lexicographical order, so
-as to canonicalize interfaces. [Regular @(<)@ should be used for fast
-comparison.]
-
-\begin{code}
-a `ltLexical` b = origName a < origName b
+getOccString = occNameString . getOccName
\end{code}
-These functions test strings to see if they fit the lexical categories
-defined in the Haskell report. Normally applied as in e.g. @isCon
-(getLocalName foo)@.
-
-\begin{code}
-isLexCon, isLexVar, isLexId, isLexSym, isLexConId, isLexConSym,
- isLexVarId, isLexVarSym, isLexSpecialSym :: FAST_STRING -> Bool
-
-isLexCon cs = isLexConId cs || isLexConSym cs
-isLexVar cs = isLexVarId cs || isLexVarSym cs
-
-isLexId cs = isLexConId cs || isLexVarId cs
-isLexSym cs = isLexConSym cs || isLexVarSym cs
-
--------------
-
-isLexConId cs
- | _NULL_ cs = False
- | c == '_' = isLexConId (_TAIL_ cs) -- allow for leading _'s
- | otherwise = isUpper c || isUpperISO c
- where
- c = _HEAD_ cs
-
-isLexVarId cs
- | _NULL_ cs = False
- | c == '_' = isLexVarId (_TAIL_ cs) -- allow for leading _'s
- | otherwise = isLower c || isLowerISO c
- where
- c = _HEAD_ cs
-
-isLexConSym cs
- | _NULL_ cs = False
- | otherwise = c == ':'
--- || c == '(' -- (), (,), (,,), ...
- || cs == SLIT("->")
--- || cs == SLIT("[]")
- where
- c = _HEAD_ cs
-
-isLexVarSym cs
- | _NULL_ cs = False
- | otherwise = isSymbolASCII c
- || isSymbolISO c
--- || c == '(' -- (), (,), (,,), ...
--- || cs == SLIT("[]")
- where
- c = _HEAD_ cs
-
-isLexSpecialSym cs
- | _NULL_ cs = False
- | otherwise = c == '(' -- (), (,), (,,), ...
- || cs == SLIT("[]")
- where
- c = _HEAD_ cs
-
--------------
-isSymbolASCII c = c `elem` "!#$%&*+./<=>?@\\^|~-"
-isSymbolISO c = ord c `elem` (0xd7 : 0xf7 : [0xa1 .. 0xbf])
-isUpperISO c = 0xc0 <= oc && oc <= 0xde && oc /= 0xd7 where oc = ord c
-isLowerISO c = 0xdf <= oc && oc <= 0xff && oc /= 0xf7 where oc = ord c
-\end{code}
-
-And one ``higher-level'' interface to those:
-
-\begin{code}
-isSymLexeme :: NamedThing a => a -> Bool
-
-isSymLexeme v
- = let str = nameOf (origName v) in isLexSym str
-
--- print `vars`, (op) correctly
-pprSym, pprNonSym :: (NamedThing name, Outputable name) => PprStyle -> name -> Pretty
-
-pprSym sty var
- = let
- str = nameOf (origName var)
- in
- if isLexSym str && not (isLexSpecialSym str)
- then ppr sty var
- else ppBesides [ppChar '`', ppr sty var, ppChar '`']
-
-pprNonSym sty var
- = if isSymLexeme var
- then ppParens (ppr sty var)
- else ppr sty var
-\end{code}
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