-- The Name type
Name, -- Abstract
- mkLocalName, mkSysLocalName, mkCCallName,
- mkIPName,
- mkGlobalName, mkKnownKeyGlobal, mkWiredInName,
+ BuiltInSyntax(..),
+ mkInternalName, mkSystemName,
+ mkSystemVarName, mkSysTvName,
+ mkFCallName, mkIPName,
+ mkExternalName, mkWiredInName,
nameUnique, setNameUnique,
nameOccName, nameModule, nameModule_maybe,
- setNameOcc, nameRdrName, setNameModuleAndLoc,
- toRdrName, hashName,
- globaliseName, localiseName,
+ setNameOcc,
+ hashName, localiseName,
- nameSrcLoc, nameIsLocallyDefined, isDllName, nameIsFrom, nameIsLocalOrFrom,
+ nameSrcLoc, nameParent, nameParent_maybe, isImplicitName,
- isSystemName, isLocalName, isGlobalName, isExternallyVisibleName,
- isTyVarName,
+ isSystemName, isInternalName, isExternalName,
+ isTyVarName, isWiredInName, isBuiltInSyntax,
+ wiredInNameTyThing_maybe,
+ nameIsLocalOrFrom,
- -- 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
+ getSrcLoc, getOccString
) where
#include "HsVersions.h"
+import {-# SOURCE #-} TypeRep( TyThing )
+
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 Module ( Module, moduleFS )
+import SrcLoc ( noSrcLoc, wiredInSrcLoc, SrcLoc )
+import Unique ( Unique, Uniquable(..), getKey, pprUnique )
+import Maybes ( orElse, isJust )
+import FastString ( FastString, zEncodeFS )
import Outputable
\end{code}
\begin{code}
data Name = Name {
n_sort :: NameSort, -- What sort of name it is
- n_occ :: OccName, -- Its occurrence name
+ n_occ :: !OccName, -- Its occurrence name
n_uniq :: Unique,
- n_loc :: SrcLoc -- Definition site
+ 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
- = 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
+ = 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
- | Local -- A user-defined Id or TyVar
+ | 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 Global names,
- and all other local Ids get Local names
+1. Initially, top-level Ids (including locally-defined ones) get External names,
+ and all other local Ids get Internal names
-2. Things with a @Global@ name are given C static labels, so they finally
+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 @Global@ first.
+ must be made @External@ 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
+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
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}
nameUnique :: Name -> Unique
nameOccName :: Name -> OccName
nameUnique name = n_uniq name
nameOccName name = n_occ name
nameSrcLoc name = n_loc name
-
-nameModule (Name { n_sort = Global mod }) = mod
-nameModule name = pprPanic "nameModule" (ppr name)
-
-nameModule_maybe (Name { n_sort = Global mod }) = Just mod
-nameModule_maybe name = Nothing
\end{code}
\begin{code}
-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
+nameIsLocalOrFrom :: Module -> Name -> Bool
+isInternalName :: Name -> Bool
+isExternalName :: Name -> Bool
+isSystemName :: Name -> Bool
+isWiredInName :: Name -> Bool
+
+isWiredInName (Name {n_sort = WiredIn _ _ _ _}) = True
+isWiredInName other = False
-isGlobalName (Name {n_sort = Global _}) = True
-isGlobalName other = False
+wiredInNameTyThing_maybe :: Name -> Maybe TyThing
+wiredInNameTyThing_maybe (Name {n_sort = WiredIn _ _ thing _}) = Just thing
+wiredInNameTyThing_maybe other = Nothing
-isLocalName name = not (isGlobalName name)
+isBuiltInSyntax (Name {n_sort = WiredIn _ _ _ BuiltInSyntax}) = True
+isBuiltInSyntax other = False
-nameIsLocallyDefined name = isLocalName name
+isExternalName (Name {n_sort = External _ _}) = True
+isExternalName (Name {n_sort = WiredIn _ _ _ _}) = True
+isExternalName other = False
-nameIsLocalOrFrom from (Name {n_sort = Global mod}) = mod == from
-nameIsLocalOrFrom from other = True
+isInternalName name = not (isExternalName name)
-nameIsFrom from (Name {n_sort = Global mod}) = mod == from
-nameIsFrom from other = pprPanic "nameIsFrom" (ppr other)
+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
--- 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
+nameParent :: Name -> Name
+nameParent name = case nameParent_maybe name of
+ Just parent -> parent
+ Nothing -> name
+
+isImplicitName :: Name -> Bool
+-- An Implicit Name is one has a parent; that is, one whose definition
+-- derives from the parent thing
+isImplicitName name = isJust (nameParent_maybe name)
+
+nameModule name = nameModule_maybe name `orElse` pprPanic "nameModule" (ppr name)
+nameModule_maybe (Name { n_sort = External mod _}) = Just mod
+nameModule_maybe (Name { n_sort = WiredIn mod _ _ _}) = Just mod
+nameModule_maybe name = Nothing
+
+nameIsLocalOrFrom from name
+ | isExternalName name = from == nameModule name
+ | otherwise = True
+
+isTyVarName :: Name -> Bool
+isTyVarName name = isTvOcc (nameOccName name)
isSystemName (Name {n_sort = System}) = True
isSystemName other = False
%************************************************************************
\begin{code}
-mkLocalName :: Unique -> OccName -> SrcLoc -> Name
-mkLocalName uniq occ loc = Name { n_uniq = uniq, n_sort = Local, n_occ = occ, n_loc = loc }
+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
-- * 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 }
+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 }
-mkKnownKeyGlobal :: RdrName -> Unique -> Name
-mkKnownKeyGlobal rdr_name uniq
- = mkGlobalName uniq (mkVanillaModule (rdrNameModule rdr_name))
- (rdrNameOcc rdr_name)
- builtinSrcLoc
+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 -> OccName -> Name
+mkSystemName uniq occ = Name { n_uniq = uniq, n_sort = System,
+ n_occ = occ, n_loc = noSrcLoc }
-mkWiredInName :: Module -> OccName -> Unique -> Name
-mkWiredInName mod occ uniq = mkGlobalName uniq mod occ builtinSrcLoc
+mkSystemVarName :: Unique -> FastString -> Name
+mkSystemVarName uniq fs = mkSystemName uniq (mkVarOccFS fs)
-mkSysLocalName :: Unique -> UserFS -> Name
-mkSysLocalName uniq fs = Name { n_uniq = uniq, n_sort = System,
- n_occ = mkVarOcc fs, n_loc = noSrcLoc }
+mkSysTvName :: Unique -> FastString -> Name
+mkSysTvName uniq fs = mkSystemName uniq (mkOccNameFS tvName fs)
-mkCCallName :: Unique -> EncodedString -> Name
+mkFCallName :: Unique -> String -> 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 }
+mkFCallName uniq str = Name { n_uniq = uniq, n_sort = Internal,
+ n_occ = mkVarOcc str, n_loc = noSrcLoc }
mkIPName :: Unique -> OccName -> Name
mkIPName uniq occ
= Name { n_uniq = uniq,
- n_sort = Local,
+ n_sort = Internal,
n_occ = occ,
n_loc = noSrcLoc }
\end{code}
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
+localiseName n = n { n_sort = Internal }
\end{code}
\begin{code}
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
-
-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
-
-
-
-isTyVarName :: Name -> Bool
-isTyVarName name = isTvOcc (nameOccName name)
+hashName name = getKey (nameUnique name)
\end{code}
%************************************************************************
%* *
-\subsection{Name environment}
-%* *
-%************************************************************************
-
-\begin{code}
-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
- -- 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})
+instance OutputableBndr Name where
+ pprBndr _ name = pprName name
+
+pprName (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
+ WiredIn mod _ _ builtin -> pprExternal sty uniq mod occ True builtin
+ External mod _ -> pprExternal sty uniq mod occ False UserSyntax
+ System -> pprSystem sty uniq occ
+ Internal -> pprInternal sty uniq occ
+
+pprExternal sty uniq mod occ is_wired is_builtin
+ | codeStyle sty = ppr_z_module mod <> char '_' <> ppr_z_occ_name occ
+ -- In code style, always qualify
+ -- ToDo: maybe we could print all wired-in things unqualified
+ -- in code style, to reduce symbol table bloat?
+ | debugStyle sty = ppr mod <> dot <> ppr_occ_name occ
+ <> braces (hsep [if is_wired then ptext SLIT("(w)") else empty,
+ pprNameSpaceBrief (occNameSpace occ),
+ pprUnique uniq])
+ | BuiltInSyntax <- is_builtin = ppr_occ_name occ
+ -- never qualify builtin syntax
+ | unqualStyle sty mod occ = ppr_occ_name occ
+ | otherwise = ppr mod <> dot <> ppr_occ_name occ
+
+pprInternal 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
+ | debugStyle sty = ppr_occ_name occ <> braces (hsep [pprNameSpaceBrief (occNameSpace occ),
+ pprUnique uniq])
+ | dumpStyle sty = ppr_occ_name occ <> char '_' <> pprUnique uniq
+ -- For debug dumps, we're not necessarily dumping
+ -- tidied code, so we need to print the uniques.
+ | otherwise = ppr_occ_name occ -- User style
+
+-- Like Internal, except that we only omit the unique in Iface style
+pprSystem 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
+ | debugStyle sty = ppr_occ_name occ <> char '_' <> pprUnique uniq
+ <> braces (pprNameSpaceBrief (occNameSpace occ))
+ | otherwise = ppr_occ_name occ <> char '_' <> pprUnique uniq
-- If the tidy phase hasn't run, the OccName
-- is unlikely to be informative (like 's'),
-- so print the unique
+
+ppr_occ_name occ = ftext (occNameFS occ)
+ -- Don't use pprOccName; instead, just print the string of the OccName;
+ -- we print the namespace in the debug stuff above
+
+-- In code style, we Z-encode the strings. The results of Z-encoding each FastString are
+-- cached behind the scenes in the FastString implementation.
+ppr_z_occ_name occ = ftext (zEncodeFS (occNameFS occ))
+ppr_z_module mod = ftext (zEncodeFS (moduleFS mod))
+
\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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