X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FbasicTypes%2FName.lhs;h=3aeb03b8bf49e7c87fc875418a2b26fd3bdbef10;hb=9d7da331989abcd1844e9d03b8d1e4163796fa85;hp=29b2b3eb0dc7cb805a071a47e003e094344dff76;hpb=4e3255388e8b99ccdae290bfcb6cd666b8c93d4a;p=ghc-hetmet.git diff --git a/ghc/compiler/basicTypes/Name.lhs b/ghc/compiler/basicTypes/Name.lhs index 29b2b3e..3aeb03b 100644 --- a/ghc/compiler/basicTypes/Name.lhs +++ b/ghc/compiler/basicTypes/Name.lhs @@ -10,22 +10,23 @@ module Name ( -- The Name type Name, -- Abstract - mkInternalName, mkSystemName, - mkSystemNameEncoded, mkSysTvName, + BuiltInSyntax(..), + mkInternalName, mkSystemName, + mkSystemVarName, mkSysTvName, mkFCallName, mkIPName, mkExternalName, mkWiredInName, nameUnique, setNameUnique, - nameOccName, nameModule, nameModule_maybe, nameModuleName, + nameOccName, nameModule, nameModule_maybe, setNameOcc, hashName, localiseName, - nameSrcLoc, nameParent, nameParent_maybe, + nameSrcLoc, nameParent, nameParent_maybe, isImplicitName, isSystemName, isInternalName, isExternalName, - isTyVarName, isDllName, isWiredInName, + isTyVarName, isWiredInName, isBuiltInSyntax, wiredInNameTyThing_maybe, - nameIsLocalOrFrom, isHomePackageName, + nameIsLocalOrFrom, -- Class NamedThing and overloaded friends NamedThing(..), @@ -37,12 +38,11 @@ module Name ( import {-# SOURCE #-} TypeRep( TyThing ) import OccName -- All of it -import Module ( Module, ModuleName, moduleName, isHomeModule ) -import CmdLineOpts ( opt_Static ) +import Module ( Module, moduleFS ) import SrcLoc ( noSrcLoc, wiredInSrcLoc, SrcLoc ) import Unique ( Unique, Uniquable(..), getKey, pprUnique ) -import Maybes ( orElse ) -import FastTypes +import Maybes ( orElse, isJust ) +import FastString ( FastString, zEncodeFS ) import Outputable \end{code} @@ -70,7 +70,7 @@ data NameSort -- e.g. data constructor of a data type, method of a class -- Nothing => not a subordinate - | WiredIn Module (Maybe Name) TyThing + | WiredIn Module (Maybe Name) TyThing BuiltInSyntax -- A variant of External, for wired-in things | Internal -- A user-defined Id or TyVar @@ -78,6 +78,11 @@ data NameSort | 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: @@ -103,11 +108,18 @@ Notes about the NameSorts: 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 nameModule :: Name -> Module -nameModuleName :: Name -> ModuleName nameSrcLoc :: Name -> SrcLoc nameUnique name = n_uniq name @@ -120,50 +132,48 @@ nameIsLocalOrFrom :: Module -> Name -> Bool isInternalName :: Name -> Bool isExternalName :: Name -> Bool isSystemName :: Name -> Bool -isHomePackageName :: Name -> Bool isWiredInName :: Name -> Bool -isWiredInName (Name {n_sort = WiredIn _ _ _}) = True -isWiredInName other = False +isWiredInName (Name {n_sort = WiredIn _ _ _ _}) = True +isWiredInName other = False wiredInNameTyThing_maybe :: Name -> Maybe TyThing -wiredInNameTyThing_maybe (Name {n_sort = WiredIn _ _ thing}) = Just thing -wiredInNameTyThing_maybe other = Nothing +wiredInNameTyThing_maybe (Name {n_sort = WiredIn _ _ thing _}) = Just thing +wiredInNameTyThing_maybe other = Nothing + +isBuiltInSyntax (Name {n_sort = WiredIn _ _ _ BuiltInSyntax}) = True +isBuiltInSyntax other = False -isExternalName (Name {n_sort = External _ _}) = True -isExternalName (Name {n_sort = WiredIn _ _ _}) = True -isExternalName other = False +isExternalName (Name {n_sort = External _ _}) = True +isExternalName (Name {n_sort = WiredIn _ _ _ _}) = True +isExternalName other = False isInternalName name = not (isExternalName name) 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 +nameParent_maybe (Name {n_sort = External _ p}) = p +nameParent_maybe (Name {n_sort = WiredIn _ p _ _}) = p +nameParent_maybe other = Nothing nameParent :: Name -> Name nameParent name = case nameParent_maybe name of Just parent -> parent Nothing -> name -nameModule name = nameModule_maybe name `orElse` pprPanic "nameModule" (ppr name) -nameModuleName name = moduleName (nameModule 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_maybe (Name { n_sort = External mod _}) = Just mod -nameModule_maybe (Name { n_sort = WiredIn mod _ _}) = Just mod -nameModule_maybe name = Nothing +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 -isHomePackageName name - | isExternalName name = isHomeModule (nameModule name) - | otherwise = True -- Internal and system names - -isDllName :: Name -> Bool -- Does this name refer to something in a different DLL? -isDllName nm = not opt_Static && not (isHomePackageName nm) - isTyVarName :: Name -> Bool isTyVarName name = isTvOcc (nameOccName name) @@ -195,32 +205,27 @@ 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 -> Name -mkWiredInName mod occ uniq mb_parent thing +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, + 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 } +mkSystemName :: Unique -> OccName -> Name +mkSystemName uniq occ = Name { n_uniq = uniq, n_sort = System, + n_occ = occ, 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 } +mkSystemVarName :: Unique -> FastString -> Name +mkSystemVarName uniq fs = mkSystemName uniq (mkVarOccFS fs) -mkSysTvName :: Unique -> EncodedFS -> Name -mkSysTvName uniq fs = Name { n_uniq = uniq, n_sort = System, - n_occ = mkSysOccFS tvName fs, - n_loc = noSrcLoc } +mkSysTvName :: Unique -> FastString -> Name +mkSysTvName uniq fs = mkSystemName uniq (mkOccNameFS tvName fs) -mkFCallName :: Unique -> EncodedString -> Name +mkFCallName :: Unique -> String -> 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 } + n_occ = mkVarOcc str, n_loc = noSrcLoc } mkIPName :: Unique -> OccName -> Name mkIPName uniq occ @@ -294,7 +299,6 @@ instance NamedThing Name where \begin{code} instance Outputable Name where - -- When printing interfaces, all Internals have been given nice print-names ppr name = pprName name instance OutputableBndr Name where @@ -303,38 +307,53 @@ instance OutputableBndr Name where pprName (Name {n_sort = sort, n_uniq = uniq, n_occ = occ}) = getPprStyle $ \ sty -> case sort of - External mod mb_p -> pprExternal sty uniq mod occ mb_p False - WiredIn mod mb_p thing -> pprExternal sty uniq mod occ mb_p True - System -> pprSystem sty uniq occ - Internal -> pprInternal sty uniq occ - -pprExternal sty uniq mod occ mb_p is_wired - | 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 "-}"]] - | unqualStyle sty mod_name occ = pprOccName occ - | otherwise = ppr mod_name <> dot <> pprOccName occ - where - mod_name = moduleName mod + 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 "{-" <> pprUnique uniq <> text "-}" - | otherwise = pprOccName occ -- User style + | 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 - | 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} %************************************************************************