X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FbasicTypes%2FName.lhs;h=0e0524e29fa7209db7ec6ba9f1d80ed572d95b96;hb=e71eb9f04c7edb2bec5f4eb954f8d9cfa5062be2;hp=0e4a36124bc0ba2870f0ebdf5ce216892ec8d8a8;hpb=00d5de2d88e39ee7437d22e1dac247b955da5ee4;p=ghc-hetmet.git diff --git a/ghc/compiler/basicTypes/Name.lhs b/ghc/compiler/basicTypes/Name.lhs index 0e4a361..0e0524e 100644 --- a/ghc/compiler/basicTypes/Name.lhs +++ b/ghc/compiler/basicTypes/Name.lhs @@ -1,157 +1,58 @@ % -% (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 ( - -- Re-export the Module type - SYN_IE(Module), - pprModule, moduleString, - - -- The OccName type - OccName(..), - pprOccName, occNameString, occNameFlavour, - isTvOcc, isTCOcc, isVarOcc, prefixOccName, - uniqToOccName, + -- Re-export the OccName stuff + module OccName, -- The Name type Name, -- Abstract - mkLocalName, mkSysLocalName, - - mkCompoundName, mkGlobalName, mkInstDeclName, - - mkWiredInIdName, mkWiredInTyConName, - maybeWiredInIdName, maybeWiredInTyConName, - isWiredInName, - - nameUnique, changeUnique, setNameProvenance, getNameProvenance, - setNameVisibility, - nameOccName, nameString, nameModule, + mkLocalName, mkSysLocalName, mkCCallName, + mkIPName, + mkGlobalName, mkKnownKeyGlobal, mkWiredInName, + + nameUnique, setNameUnique, + nameOccName, nameModule, nameModule_maybe, + setNameOcc, nameRdrName, setNameModuleAndLoc, + toRdrName, hashName, + globaliseName, localiseName, + + nameSrcLoc, + + isSystemName, isLocalName, isGlobalName, isExternallyVisibleName, + isTyVarName, isDllName, + nameIsLocalOrFrom, isHomePackageName, + + -- Environment + NameEnv, mkNameEnv, + emptyNameEnv, unitNameEnv, nameEnvElts, + extendNameEnv_C, extendNameEnv, foldNameEnv, filterNameEnv, + plusNameEnv, plusNameEnv_C, extendNameEnv, extendNameEnvList, + lookupNameEnv, lookupNameEnv_NF, delFromNameEnv, elemNameEnv, - isExportedName, nameSrcLoc, - isLocallyDefinedName, - - isLocalName, - - pprNameProvenance, - - -- Sets of Names - SYN_IE(NameSet), - emptyNameSet, unitNameSet, mkNameSet, unionNameSets, unionManyNameSets, - minusNameSet, elemNameSet, nameSetToList, addOneToNameSet, addListToNameSet, isEmptyNameSet, - - -- Misc - Provenance(..), pprProvenance, - ExportFlag(..), -- Class NamedThing and overloaded friends NamedThing(..), - modAndOcc, isExported, - getSrcLoc, isLocallyDefined, getOccString + getSrcLoc, getOccString, toRdrName ) where -IMP_Ubiq() -#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 201 -IMPORT_DELOOPER(TyLoop) ( GenId, Id(..), TyCon ) -- Used inside Names -#else -import {-# SOURCE #-} Id ( Id ) -import {-# SOURCE #-} TyCon ( TyCon ) -#endif - -import CStrings ( identToC, modnameToC, cSEP ) -import CmdLineOpts ( opt_OmitInterfacePragmas, opt_EnsureSplittableC, all_toplev_ids_visible ) -import BasicTypes ( SYN_IE(Module), IfaceFlavour(..), moduleString, pprModule ) - -import Outputable ( Outputable(..), PprStyle(..), codeStyle, ifaceStyle ) -import PrelMods ( gHC__ ) -import Pretty -import Lex ( isLexSym, isLexConId ) -import SrcLoc ( noSrcLoc, SrcLoc ) -import Usage ( SYN_IE(UVar), SYN_IE(Usage) ) -import Unique ( pprUnique, showUnique, Unique, Uniquable(..) ) -import UniqSet ( UniqSet(..), emptyUniqSet, unitUniqSet, unionUniqSets, uniqSetToList, isEmptyUniqSet, - unionManyUniqSets, minusUniqSet, mkUniqSet, elementOfUniqSet, addListToUniqSet, addOneToUniqSet ) -import UniqFM ( UniqFM ) -import Util ( Ord3(..), cmpPString, panic, assertPanic {-, pprTrace ToDo:rm-} ) -\end{code} - - -%************************************************************************ -%* * -\subsection[Name-pieces-datatypes]{The @OccName@ datatypes} -%* * -%************************************************************************ +#include "HsVersions.h" -\begin{code} -data OccName = VarOcc FAST_STRING -- Variables and data constructors - | TvOcc FAST_STRING -- Type variables - | TCOcc FAST_STRING -- Type constructors and classes - -pprOccName :: PprStyle -> OccName -> Doc -pprOccName sty n = if codeStyle sty - then identToC (occNameString n) - else ptext (occNameString n) - -occNameString :: OccName -> FAST_STRING -occNameString (VarOcc s) = s -occNameString (TvOcc s) = s -occNameString (TCOcc s) = s - -prefixOccName :: FAST_STRING -> OccName -> OccName -prefixOccName prefix (VarOcc s) = VarOcc (prefix _APPEND_ s) -prefixOccName prefix (TvOcc s) = TvOcc (prefix _APPEND_ s) -prefixOccName prefix (TCOcc s) = TCOcc (prefix _APPEND_ s) - --- occNameFlavour is used only to generate good error messages, so it doesn't matter --- that the VarOcc case isn't mega-efficient. We could have different Occ constructors for --- data constructors and values, but that makes everything else a bit more complicated. -occNameFlavour :: OccName -> String -occNameFlavour (VarOcc s) | isLexConId s = "Data constructor" - | otherwise = "Value" -occNameFlavour (TvOcc s) = "Type variable" -occNameFlavour (TCOcc s) = "Type constructor or class" - -isVarOcc, isTCOcc, isTvOcc :: OccName -> Bool -isVarOcc (VarOcc s) = True -isVarOcc other = False - -isTvOcc (TvOcc s) = True -isTvOcc other = False - -isTCOcc (TCOcc s) = True -isTCOcc other = False - -instance Eq OccName where - a == b = case (a `cmp` b) of { EQ_ -> True; _ -> False } - a /= b = case (a `cmp` b) of { EQ_ -> False; _ -> True } - -instance Ord OccName 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 OccName where - cmp = cmpOcc - -(VarOcc s1) `cmpOcc` (VarOcc s2) = s1 `_CMP_STRING_` s2 -(VarOcc s1) `cmpOcc` other2 = LT_ - -(TvOcc s1) `cmpOcc` (VarOcc s2) = GT_ -(TvOcc s1) `cmpOcc` (TvOcc s2) = s1 `_CMP_STRING_` s2 -(TvOcc s1) `cmpOcc` other = LT_ - -(TCOcc s1) `cmpOcc` (TCOcc s2) = s1 `_CMP_STRING_` s2 -(TCOcc s1) `cmpOcc` other = GT_ - -instance Outputable OccName where - ppr = pprOccName +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, and name construction} @@ -159,175 +60,171 @@ instance Outputable OccName where %************************************************************************ \begin{code} -data Name - = Local Unique - OccName - SrcLoc - - | Global Unique - Module -- The defining module - OccName -- Its name in that module - Provenance -- How it was defined +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} -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. +Notes about the NameSorts: -\begin{code} -data Provenance - = LocalDef ExportFlag SrcLoc -- Locally defined - | Imported Module SrcLoc IfaceFlavour -- Directly imported from M; - -- gives name of module in import statement - -- and locn of import statement - | Implicit IfaceFlavour -- Implicitly imported - | WiredInTyCon TyCon -- There's a wired-in version - | WiredInId Id -- ...ditto... -\end{code} +1. Initially, top-level Ids (including locally-defined ones) get Global names, + and all other local Ids get Local names -Something is "Exported" if it may be mentioned by another module without -warning. The crucial thing about Exported things is that they must -never be dropped as dead code, even if they aren't used in this module. -Furthermore, being Exported means that we can't see all call sites of the thing. +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. -Exported things include: - - explicitly exported Ids, including data constructors, class method selectors - - dfuns from instance decls +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 -Being Exported is *not* the same as finally appearing in the .o file's -symbol table. For example, a local Id may be mentioned in an Exported -Id's unfolding in the interface file, in which case the local Id goes -out too. +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 -\begin{code} -data ExportFlag = Exported | NotExported -\end{code} + 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} -mkLocalName :: Unique -> OccName -> SrcLoc -> Name -mkLocalName = Local - -mkGlobalName :: Unique -> Module -> OccName -> Provenance -> Name -mkGlobalName = Global +nameUnique :: Name -> Unique +nameOccName :: Name -> OccName +nameModule :: Name -> Module +nameSrcLoc :: Name -> SrcLoc -mkSysLocalName :: Unique -> FAST_STRING -> SrcLoc -> Name -mkSysLocalName uniq str loc = Local uniq (VarOcc str) loc +nameUnique name = n_uniq name +nameOccName name = n_occ name +nameSrcLoc name = n_loc name -mkWiredInIdName :: Unique -> Module -> FAST_STRING -> Id -> Name -mkWiredInIdName uniq mod occ id - = Global uniq mod (VarOcc occ) (WiredInId id) +nameModule (Name { n_sort = Global mod }) = mod +nameModule name = pprPanic "nameModule" (ppr name) -mkWiredInTyConName :: Unique -> Module -> FAST_STRING -> TyCon -> Name -mkWiredInTyConName uniq mod occ tycon - = Global uniq mod (TCOcc occ) (WiredInTyCon tycon) +nameModule_maybe (Name { n_sort = Global mod }) = Just mod +nameModule_maybe name = Nothing +\end{code} +\begin{code} +nameIsLocalOrFrom :: Module -> Name -> Bool +isLocalName :: Name -> Bool -- Not globals +isGlobalName :: Name -> Bool +isSystemName :: Name -> Bool +isExternallyVisibleName :: Name -> Bool +isHomePackageName :: Name -> Bool -mkCompoundName :: (FAST_STRING -> FAST_STRING) -- Occurrence-name modifier - -> Unique -- New unique - -> Name -- Base name (must be a Global) - -> Name -- Result is always a value name +isGlobalName (Name {n_sort = Global _}) = True +isGlobalName other = False -mkCompoundName str_fn uniq (Global _ mod occ prov) - = Global uniq mod new_occ prov - where - new_occ = VarOcc (str_fn (occNameString occ)) -- Always a VarOcc +isLocalName name = not (isGlobalName name) -mkCompoundName str_fn uniq (Local _ occ loc) - = Local uniq (VarOcc (str_fn (occNameString occ))) loc +nameIsLocalOrFrom from (Name {n_sort = Global mod}) = mod == from +nameIsLocalOrFrom from other = True - -- Rather a wierd one that's used for names generated for instance decls -mkInstDeclName :: Unique -> Module -> OccName -> SrcLoc -> Bool -> Name -mkInstDeclName uniq mod occ loc from_here - = Global uniq mod occ prov - where - prov | from_here = LocalDef Exported loc - | otherwise = Implicit HiFile -- Odd +isHomePackageName (Name {n_sort = Global mod}) = isHomeModule mod +isHomePackageName other = True -- Local and system names +isDllName :: Name -> Bool -- Does this name refer to something in a different DLL? +isDllName nm = not opt_Static && not (isHomePackageName nm) -setNameProvenance :: Name -> Provenance -> Name - -- setNameProvenance used to only change the provenance of Implicit-provenance things, - -- but that gives bad error messages for names defined twice in the same - -- module, so I changed it to set the proveance of *any* global (SLPJ Jun 97) -setNameProvenance (Global uniq mod occ _) prov = Global uniq mod occ prov -setNameProvenance other_name prov = other_name +isTyVarName :: Name -> Bool +isTyVarName name = isTvOcc (nameOccName name) -getNameProvenance :: Name -> Provenance -getNameProvenance (Global uniq mod occ prov) = prov -getNameProvenance (Local uniq occ locn) = LocalDef NotExported locn +-- 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 --- 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 l) u = Local u n l -changeUnique (Global _ mod occ prov) u = Global u mod occ prov +isSystemName (Name {n_sort = System}) = True +isSystemName other = False \end{code} -setNameVisibility is applied to names in the final program - -The Maybe Module argument is (Just mod) for top-level values, -and Nothing for all others (local values and type variables) - -For top-level things, it globalises Local names - (if all top-level things should be visible) - and localises non-exported Global names - (if only exported things should be visible) - -For nested things it localises Global names. - -In all cases except an exported global, it gives it a new occurrence name. -The "visibility" here concerns whether the .o file's symbol table -mentions the thing; if so, it needs a module name in its symbol. -The Global things are "visible" and the Local ones are not - -Why should things be "visible"? Certainly they must be if they -are exported. But also: - -(a) In certain (prelude only) modules we split up the .hc file into - lots of separate little files, which are separately compiled by the C - compiler. That gives lots of little .o files. The idea is that if - you happen to mention one of them you don't necessarily pull them all - in. (Pulling in a piece you don't need can be v bad, because it may - mention other pieces you don't need either, and so on.) - - Sadly, splitting up .hc files means that local names (like s234) are - now globally visible, which can lead to clashes between two .hc - files. So unlocaliseWhatnot goes through making all the local things - into global things, essentially by giving them full names so when they - are printed they'll have their module name too. Pretty revolting - really. - -(b) When optimisation is on we want to make all the internal - top-level defns externally visible +%************************************************************************ +%* * +\subsection{Making names} +%* * +%************************************************************************ \begin{code} -setNameVisibility :: Maybe Module -> Unique -> Name -> Name - -setNameVisibility maybe_mod occ_uniq name@(Global uniq mod occ (LocalDef NotExported loc)) - | not all_toplev_ids_visible || not_top_level maybe_mod - = Local uniq (uniqToOccName occ_uniq) loc -- Localise Global name - -setNameVisibility maybe_mod occ_uniq name@(Global _ _ _ _) - = name -- Otherwise don't fiddle with Global - -setNameVisibility (Just mod) occ_uniq (Local uniq occ loc) - | all_toplev_ids_visible - = Global uniq mod -- Globalise Local name - (uniqToOccName occ_uniq) - (LocalDef NotExported loc) - -setNameVisibility maybe_mod occ_uniq (Local uniq occ loc) - = Local uniq (uniqToOccName occ_uniq) loc -- New OccName for Local - -uniqToOccName uniq = VarOcc (_PK_ ('$':showUnique uniq)) - -- The "$" is to make sure that this OccName is distinct from all user-defined ones - -not_top_level (Just m) = False -not_top_level Nothing = True +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} +\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} @@ -335,63 +232,15 @@ not_top_level Nothing = True %************************************************************************ \begin{code} -nameUnique :: Name -> Unique -nameModAndOcc :: Name -> (Module, OccName) -- Globals only -nameOccName :: Name -> OccName -nameModule :: Name -> Module -nameString :: Name -> FAST_STRING -- A.b form -nameSrcLoc :: Name -> SrcLoc -isLocallyDefinedName :: Name -> Bool -isExportedName :: Name -> Bool -isWiredInName :: Name -> Bool -isLocalName :: Name -> Bool - - - -nameUnique (Local u _ _) = u -nameUnique (Global u _ _ _) = u - -nameOccName (Local _ occ _) = occ -nameOccName (Global _ _ occ _) = occ +hashName :: Name -> Int +hashName name = iBox (u2i (nameUnique name)) -nameModule (Global _ mod occ _) = mod -nameModAndOcc (Global _ mod occ _) = (mod,occ) - -nameString (Local _ occ _) = occNameString occ -nameString (Global _ mod occ _) = mod _APPEND_ SLIT(".") _APPEND_ occNameString occ - -isExportedName (Global _ _ _ (LocalDef Exported _)) = True -isExportedName other = False - -nameSrcLoc (Local _ _ loc) = loc -nameSrcLoc (Global _ _ _ (LocalDef _ loc)) = loc -nameSrcLoc (Global _ _ _ (Imported _ loc _)) = loc -nameSrcLoc other = noSrcLoc - -isLocallyDefinedName (Local _ _ _) = True -isLocallyDefinedName (Global _ _ _ (LocalDef _ _)) = True -isLocallyDefinedName other = False - --- Things the compiler "knows about" are in some sense --- "imported". When we are compiling the module where --- the entities are defined, we need to be able to pick --- them out, often in combination with isLocallyDefined. -isWiredInName (Global _ _ _ (WiredInTyCon _)) = True -isWiredInName (Global _ _ _ (WiredInId _)) = True -isWiredInName _ = False - -maybeWiredInIdName :: Name -> Maybe Id -maybeWiredInIdName (Global _ _ _ (WiredInId id)) = Just id -maybeWiredInIdName other = Nothing - -maybeWiredInTyConName :: Name -> Maybe TyCon -maybeWiredInTyConName (Global _ _ _ (WiredInTyCon tc)) = Just tc -maybeWiredInTyConName other = Nothing - - -isLocalName (Local _ _ _) = True -isLocalName _ = False +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 \end{code} @@ -402,136 +251,119 @@ isLocalName _ = False %************************************************************************ \begin{code} -cmpName n1 n2 = c n1 n2 - where - c (Local u1 _ _) (Local u2 _ _) = cmp u1 u2 - c (Local _ _ _) _ = LT_ - c (Global u1 _ _ _) (Global u2 _ _ _) = cmp u1 u2 - c (Global _ _ _ _) _ = GT_ +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} - %************************************************************************ %* * -\subsection{Pretty printing} +\subsection{Name environment} %* * %************************************************************************ \begin{code} -instance Outputable Name where - ppr PprQuote name@(Local _ _ _) = quotes (ppr (PprForUser 1) name) - - -- When printing interfaces, all Locals have been given nice print-names - ppr (PprForUser _) (Local _ n _) = ptext (occNameString n) - ppr PprInterface (Local _ n _) = ptext (occNameString n) - - ppr sty (Local u n _) | codeStyle sty = pprUnique u - - ppr sty (Local u n _) = hcat [ptext (occNameString n), ptext SLIT("_"), pprUnique u] - - ppr PprQuote name@(Global _ _ _ _) = quotes (ppr (PprForUser 1) name) - - ppr sty name@(Global u m n _) - | codeStyle sty - = identToC (m _APPEND_ SLIT(".") _APPEND_ occNameString n) - - ppr sty name@(Global u m n prov) - = hcat [pp_mod_dot, ptext (occNameString n), pp_debug sty name] - where - pp_mod = pprModule (PprForUser 1) m - pp_mod_dot = case prov of --- Omit home module qualifier - LocalDef _ _ -> empty - Imported _ _ hif -> pp_mod <> pp_dot hif - Implicit hif -> pp_mod <> pp_dot hif - other -> pp_mod <> text "." - - pp_dot HiFile = text "." -- Vanilla case - pp_dot HiBootFile = text "!" -- M!t indicates a name imported from a .hi-boot interface - - -pp_debug PprDebug (Global uniq m n prov) = hcat [text "{-", pprUnique uniq, char ',', - pp_prov prov, text "-}"] - where - pp_prov (LocalDef Exported _) = char 'x' - pp_prov (LocalDef NotExported _) = char 'l' - pp_prov (Imported _ _ _) = char 'i' - pp_prov (Implicit _) = char 'p' - pp_prov (WiredInTyCon _) = char 'W' - pp_prov (WiredInId _) = char 'w' -pp_debug other name = empty - --- pprNameProvenance is used in error messages to say where a name came from -pprNameProvenance :: PprStyle -> Name -> Doc -pprNameProvenance sty (Local _ _ loc) = pprProvenance sty (LocalDef NotExported loc) -pprNameProvenance sty (Global _ _ _ prov) = pprProvenance sty prov - -pprProvenance :: PprStyle -> Provenance -> Doc -pprProvenance sty (Imported mod loc _) - = sep [ptext SLIT("Imported from"), pprModule sty mod, ptext SLIT("at"), ppr sty loc] -pprProvenance sty (LocalDef _ loc) = sep [ptext SLIT("Defined at"), ppr sty loc] -pprProvenance sty (Implicit _) = panic "pprNameProvenance: Implicit" -pprProvenance sty (WiredInTyCon tc) = ptext SLIT("Wired-in tycon") -pprProvenance sty (WiredInId id) = ptext SLIT("Wired-in id") +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[Sets of names} +\subsection{Pretty printing} %* * %************************************************************************ \begin{code} -type NameSet = UniqSet Name -emptyNameSet :: NameSet -unitNameSet :: Name -> NameSet -addListToNameSet :: NameSet -> [Name] -> NameSet -addOneToNameSet :: NameSet -> Name -> NameSet -mkNameSet :: [Name] -> NameSet -unionNameSets :: NameSet -> NameSet -> NameSet -unionManyNameSets :: [NameSet] -> NameSet -minusNameSet :: NameSet -> NameSet -> NameSet -elemNameSet :: Name -> NameSet -> Bool -nameSetToList :: NameSet -> [Name] -isEmptyNameSet :: NameSet -> Bool - -isEmptyNameSet = isEmptyUniqSet -emptyNameSet = emptyUniqSet -unitNameSet = unitUniqSet -mkNameSet = mkUniqSet -addListToNameSet = addListToUniqSet -addOneToNameSet = addOneToUniqSet -unionNameSets = unionUniqSets -unionManyNameSets = unionManyUniqSets -minusNameSet = minusUniqSet -elemNameSet = elementOfUniqSet -nameSetToList = uniqSetToList +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}) + = 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} @@ -540,30 +372,19 @@ nameSetToList = uniqSetToList \begin{code} class NamedThing a where - getOccName :: a -> OccName -- Even RdrNames can do this! + getOccName :: a -> OccName getName :: a -> Name getOccName n = nameOccName (getName n) -- Default method \end{code} \begin{code} -modAndOcc :: NamedThing a => a -> (Module, OccName) -getModule :: NamedThing a => a -> Module getSrcLoc :: NamedThing a => a -> SrcLoc -isLocallyDefined :: NamedThing a => a -> Bool -isExported :: NamedThing a => a -> Bool getOccString :: NamedThing a => a -> String +toRdrName :: NamedThing a => a -> RdrName -modAndOcc = nameModAndOcc . getName -getModule = nameModule . getName -isExported = isExportedName . getName getSrcLoc = nameSrcLoc . getName -isLocallyDefined = isLocallyDefinedName . getName -getOccString x = _UNPK_ (occNameString (getOccName x)) +getOccString = occNameString . getOccName +toRdrName = nameRdrName . getName \end{code} -\begin{code} -{-# SPECIALIZE isLocallyDefined - :: Name -> Bool - #-} -\end{code}