%
-% (c) The AQUA Project, Glasgow University, 1996
+% (c) The AQUA Project, Glasgow University, 1996-1998
%
-\section[PprType]{Printing Types, TyVars, Classes, ClassOps, TyCons}
+\section[PprType]{Printing Types, TyVars, Classes, TyCons}
\begin{code}
-#include "HsVersions.h"
-
module PprType(
- GenTyVar, pprGenTyVar,
- TyCon, pprTyCon, showTyCon,
- GenType,
- pprGenType, pprParendGenType,
+ pprKind, pprParendKind,
pprType, pprParendType,
- pprMaybeTy,
- getTypeString,
- typeMaybeString,
- specMaybeTysSuffix,
- GenClass,
- GenClassOp, pprGenClassOp,
-
- addTyVar{-ToDo:don't export-}, nmbrTyVar,
- addUVar, nmbrUsage,
- nmbrType, nmbrTyCon, nmbrClass
+ pprPred, pprTheta, pprThetaArrow, pprClassPred,
+ pprTyVarBndr, pprTyVarBndrs,
+
+ -- Junk
+ getTyDescription, showTypeCategory
) where
-IMP_Ubiq()
-IMPORT_DELOOPER(IdLoop) -- for paranoia checking
-IMPORT_DELOOPER(TyLoop) -- for paranoia checking
+#include "HsVersions.h"
-- friends:
-- (PprType can see all the representations it's trying to print)
-import Type ( GenType(..), maybeAppTyCon,
- splitForAllTy, splitSigmaTy, splitRhoTy, splitAppTy )
-import TyVar ( GenTyVar(..) )
-import TyCon ( TyCon(..), NewOrData )
-import Class ( Class(..), GenClass(..),
- ClassOp(..), GenClassOp(..) )
-import Kind ( Kind(..) )
-import Usage ( GenUsage(..) )
+import TypeRep ( Type(..), TyNote(..), PredType(..), TyThing(..), Kind, superKind ) -- friend
+import Type ( typeKind, eqKind )
+import IfaceType ( toIfaceType, toIfacePred, pprParendIfaceType,
+ toIfaceKind, pprParendIfaceKind,
+ getIfaceExt )
+
+import TcType ( ThetaType, PredType,
+ tcSplitSigmaTy, isDictTy,
+ tcSplitTyConApp_maybe, tcSplitFunTy_maybe
+ )
+import Var ( TyVar, tyVarKind )
+import Class ( Class )
+import TyCon ( isPrimTyCon, isTupleTyCon, maybeTyConSingleCon, isEnumerationTyCon )
-- others:
-import CStrings ( identToC )
-import CmdLineOpts ( opt_OmitInterfacePragmas )
import Maybes ( maybeToBool )
-import Name ( isLexVarSym, isLexSpecialSym, isPreludeDefined, origName, moduleOf,
- nameOrigName, nameOf, Name{-instance Outputable-}
- )
-import Outputable ( ifPprShowAll, interpp'SP )
-import PprEnv
-import PprStyle ( PprStyle(..), codeStyle, showUserishTypes )
-import Pretty
-import TysWiredIn ( listTyCon )
-import UniqFM ( addToUFM_Directly, lookupUFM_Directly, ufmToList{-ToDo:rm-} )
-import Unique ( pprUnique10, pprUnique, incrUnique )
-import Usage ( UVar(..), pprUVar )
-import Util
-\end{code}
-
-\begin{code}
-instance (Eq tyvar, Outputable tyvar,
- Eq uvar, Outputable uvar ) => Outputable (GenType tyvar uvar) where
- ppr sty ty = pprGenType sty ty
-
-instance Outputable TyCon where
- ppr sty tycon = pprTyCon sty tycon
-
-instance Outputable (GenClass tyvar uvar) where
- -- we use pprIfaceClass for printing in interfaces
- ppr sty (Class u n _ _ _ _ _ _ _ _) = ppr sty n
-
-instance Outputable ty => Outputable (GenClassOp ty) where
- ppr sty clsop = pprGenClassOp sty clsop
-
-instance Outputable (GenTyVar flexi) where
- ppr sty tv = pprGenTyVar sty tv
-
--- and two SPECIALIZEd ones:
-instance Outputable {-Type, i.e.:-}(GenType TyVar UVar) where
- ppr sty ty = pprGenType sty ty
-
-instance Outputable {-TyVar, i.e.:-}(GenTyVar Usage) where
- ppr sty ty = pprGenTyVar sty ty
+import Name ( NamedThing(..), getOccString )
+import Outputable
+import BasicTypes ( IPName(..), ipNameName )
+import PrelNames -- quite a few *Keys
\end{code}
%************************************************************************
%* *
-\subsection[Type]{@Type@}
+\subsection{The external interface}
%* *
%************************************************************************
-@pprGenType@ is the std @Type@ printer; the overloaded @ppr@ function is
-defined to use this. @pprParendGenType@ is the same, except it puts
-parens around the type, except for the atomic cases. @pprParendGenType@
+@pprType@ is the standard @Type@ printer; the overloaded @ppr@ function is
+defined to use this. @pprParendType@ is the same, except it puts
+parens around the type, except for the atomic cases. @pprParendType@
works just by setting the initial context precedence very high.
\begin{code}
-pprGenType, pprParendGenType :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => PprStyle -> GenType tyvar uvar -> Pretty
-
-pprGenType sty ty = ppr_ty sty (init_ppr_env sty) tOP_PREC ty
-pprParendGenType sty ty = ppr_ty sty (init_ppr_env sty) tYCON_PREC ty
-
-pprType sty ty = ppr_ty sty (init_ppr_env sty) tOP_PREC (ty :: Type)
-pprParendType sty ty = ppr_ty sty (init_ppr_env sty) tYCON_PREC (ty :: Type)
-
-pprMaybeTy :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => PprStyle -> Maybe (GenType tyvar uvar) -> Pretty
-pprMaybeTy sty Nothing = ppChar '*'
-pprMaybeTy sty (Just ty) = pprParendGenType sty ty
-\end{code}
-
-\begin{code}
-ppr_ty :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => PprStyle -> PprEnv tyvar uvar bndr occ -> Int
- -> GenType tyvar uvar
- -> Pretty
-
-ppr_ty sty env ctxt_prec (TyVarTy tyvar)
- = ppr_tyvar env tyvar
-
-ppr_ty sty env ctxt_prec (TyConTy tycon usage)
- = ppr sty tycon
-
-ppr_ty sty env ctxt_prec ty@(ForAllTy _ _)
- | showUserishTypes sty = ppr_ty sty env' ctxt_prec body_ty
+pprType, pprParendType :: Type -> SDoc
+-- To save duplicating type-printing machinery,
+-- we print a type by converting to an IfaceType and printing that
+pprType ty = getIfaceExt $ \ ext ->
+ ppr (toIfaceType ext ty)
+pprParendType ty = getIfaceExt $ \ ext ->
+ pprParendIfaceType (toIfaceType ext ty)
- | otherwise = ppSep [ ppPStr SLIT("_forall_"),
- ppIntersperse pp'SP pp_tyvars,
- ppPStr SLIT("=>"),
- ppr_ty sty env' ctxt_prec body_ty
- ]
- where
- (tyvars, body_ty) = splitForAllTy ty
- env' = foldl add_tyvar env tyvars
- pp_tyvars = map (ppr_tyvar env') tyvars
-
-ppr_ty sty env ctxt_prec (ForAllUsageTy uv uvs ty)
- = panic "ppr_ty:ForAllUsageTy"
-
-ppr_ty sty env ctxt_prec ty@(FunTy (DictTy _ _ _) _ _)
- | showUserishTypes sty
- -- Print a nice looking context (Eq a, Text b) => ...
- = ppSep [ppBeside (ppr_theta theta) (ppPStr SLIT(" =>")),
- ppr_ty sty env ctxt_prec body_ty
- ]
- where
- (theta, body_ty) = splitRhoTy ty
-
- ppr_theta [ct] = ppr_dict sty env tOP_PREC ct
- ppr_theta cts = ppParens (ppInterleave ppComma (map (ppr_dict sty env tOP_PREC) cts))
-
-ppr_ty sty env ctxt_prec (FunTy ty1 ty2 usage)
- -- We fiddle the precedences passed to left/right branches,
- -- so that right associativity comes out nicely...
- = maybeParen ctxt_prec fUN_PREC
- (ppCat [ppr_ty sty env fUN_PREC ty1,
- ppPStr SLIT("->"),
- ppr_ty sty env tOP_PREC ty2])
-
-ppr_ty sty env ctxt_prec ty@(AppTy _ _)
- = ppr_corner sty env ctxt_prec fun_ty arg_tys
- where
- (fun_ty, arg_tys) = splitAppTy ty
+pprKind, pprParendKind :: Kind -> SDoc
+pprKind k = ppr (toIfaceKind k)
+pprParendKind k = pprParendIfaceKind (toIfaceKind k)
-ppr_ty PprInterface env ctxt_prec (SynTy tycon tys expansion)
- -- always expand types in an interface
- = ppr_ty PprInterface env ctxt_prec expansion
+pprPred :: PredType -> SDoc
+pprPred pred = getIfaceExt $ \ ext ->
+ ppr (toIfacePred ext pred)
-ppr_ty sty env ctxt_prec (SynTy tycon tys expansion)
- = ppBeside
- (ppr_app sty env ctxt_prec (ppr sty tycon) tys)
- (ifPprShowAll sty (ppCat [ppStr " {- expansion:",
- ppr_ty sty env tOP_PREC expansion,
- ppStr "-}"]))
+pprClassPred :: Class -> [Type] -> SDoc
+pprClassPred clas tys = ppr clas <+> sep (map pprParendType tys)
-ppr_ty sty env ctxt_prec (DictTy clas ty usage)
- = ppr_dict sty env ctxt_prec (clas, ty)
-
-
--- Some help functions
-ppr_corner sty env ctxt_prec (TyConTy FunTyCon usage) arg_tys
- | length arg_tys == 2
- = ppr_ty sty env ctxt_prec (FunTy ty1 ty2 usage)
- where
- (ty1:ty2:_) = arg_tys
-
-ppr_corner sty env ctxt_prec (TyConTy (TupleTyCon _ _ a) usage) arg_tys
- = --ASSERT(length arg_tys == a)
- (if (length arg_tys /= a) then pprTrace "ppr_corner:" (ppCat [ppInt a, ppInterleave ppComma (map (pprGenType PprDebug) arg_tys)]) else id) $
- ppBesides [ppLparen, arg_tys_w_commas, ppRparen]
- where
- arg_tys_w_commas = ppIntersperse pp'SP (map (ppr_ty sty env tOP_PREC) arg_tys)
+pprTheta :: ThetaType -> SDoc
+pprTheta theta = parens (sep (punctuate comma (map pprPred theta)))
-ppr_corner sty env ctxt_prec (TyConTy tycon usage) arg_tys
- | tycon == listTyCon
- = ASSERT(length arg_tys == 1)
- ppBesides [ppLbrack, ppr_ty sty env tOP_PREC ty1, ppRbrack]
- where
- (ty1:_) = arg_tys
-
-ppr_corner sty env ctxt_prec (TyConTy tycon usage) arg_tys
- = ppr_app sty env ctxt_prec (ppr sty tycon) arg_tys
-
-ppr_corner sty env ctxt_prec (TyVarTy tyvar) arg_tys
- = ppr_app sty env ctxt_prec (ppr_tyvar env tyvar) arg_tys
-
-
-ppr_app sty env ctxt_prec pp_fun []
- = pp_fun
-ppr_app sty env ctxt_prec pp_fun arg_tys
- = maybeParen ctxt_prec tYCON_PREC (ppCat [pp_fun, arg_tys_w_spaces])
- where
- arg_tys_w_spaces = ppIntersperse ppSP (map (ppr_ty sty env tYCON_PREC) arg_tys)
+pprThetaArrow :: ThetaType -> SDoc
+pprThetaArrow theta
+ | null theta = empty
+ | otherwise = parens (sep (punctuate comma (map pprPred theta))) <+> ptext SLIT("=>")
+instance Outputable Type where
+ ppr ty | typeKind ty `eqKind` superKind = pprKind ty
+ | otherwise = pprType ty
-ppr_dict sty env ctxt_prec (clas, ty)
- = maybeParen ctxt_prec tYCON_PREC
- (ppCat [ppr sty clas, ppr_ty sty env tYCON_PREC ty])
-\end{code}
+instance Outputable PredType where
+ ppr = pprPred
-This stuff is effectively stubbed out for the time being
-(WDP 960425):
-\begin{code}
-init_ppr_env sty
- = initPprEnv sty b b b b b b b b b b b
- where
- b = panic "PprType:init_ppr_env"
+instance Outputable name => OutputableBndr (IPName name) where
+ pprBndr _ n = ppr n -- Simple for now
-ppr_tyvar env tyvar = ppr (pStyle env) tyvar
-ppr_uvar env uvar = ppr (pStyle env) uvar
+instance Outputable TyThing where
+ ppr (AnId id) = ptext SLIT("AnId") <+> ppr id
+ ppr (ATyCon tc) = ptext SLIT("ATyCon") <+> ppr tc
+ ppr (AClass cl) = ptext SLIT("AClass") <+> ppr cl
+ ppr (ADataCon dc) = ptext SLIT("ADataCon") <+> ppr dc
-add_tyvar env tyvar = env
-add_uvar env uvar = env
+instance NamedThing TyThing where -- Can't put this with the type
+ getName (AnId id) = getName id -- decl, because the DataCon instance
+ getName (ATyCon tc) = getName tc -- isn't visible there
+ getName (AClass cl) = getName cl
+ getName (ADataCon dc) = getName dc
\end{code}
-@ppr_ty@ takes an @Int@ that is the precedence of the context.
-The precedence levels are:
-\begin{description}
-\item[0:] What we start with.
-\item[1:] Function application (@FunTys@).
-\item[2:] Type constructors.
-\end{description}
-\begin{code}
-tOP_PREC = (0 :: Int)
-fUN_PREC = (1 :: Int)
-tYCON_PREC = (2 :: Int)
-
-maybeParen ctxt_prec inner_prec pretty
- | ctxt_prec < inner_prec = pretty
- | otherwise = ppParens pretty
-\end{code}
-
%************************************************************************
%* *
\subsection[TyVar]{@TyVar@}
%* *
%************************************************************************
-\begin{code}
-pprGenTyVar sty (TyVar uniq kind name usage)
- = case sty of
- PprInterface -> pp_u
- _ -> ppBesides [pp_name, ppStr "{-", pp_u, ppStr "-}"]
- where
- pp_u = pprUnique uniq
- pp_name = case name of
- Just n -> ppPStr (nameOf (nameOrigName n))
- Nothing -> case kind of
- TypeKind -> ppChar 'o'
- BoxedTypeKind -> ppChar 't'
- UnboxedTypeKind -> ppChar 'u'
- ArrowKind _ _ -> ppChar 'a'
-\end{code}
-
-%************************************************************************
-%* *
-\subsection[TyCon]{@TyCon@}
-%* *
-%************************************************************************
-
-ToDo; all this is suspiciously like getOccName!
+We print type-variable binders with their kinds in interface files,
+and when in debug mode.
\begin{code}
-showTyCon :: PprStyle -> TyCon -> String
-showTyCon sty tycon = ppShow 80 (pprTyCon sty tycon)
-
-pprTyCon :: PprStyle -> TyCon -> Pretty
-
-pprTyCon sty FunTyCon = ppStr "(->)"
-pprTyCon sty (TupleTyCon _ name _) = ppr sty name
-pprTyCon sty (PrimTyCon _ name _ _) = ppr sty name
-
-pprTyCon sty tycon@(DataTyCon uniq name kind tyvars ctxt cons derivings nd)
- = ppr sty name
-
-pprTyCon sty (SpecTyCon tc ty_maybes)
- = ppBeside (pprTyCon sty tc)
- (if (codeStyle sty)
- then identToC tys_stuff
- else ppPStr tys_stuff)
+pprTyVarBndr :: TyVar -> SDoc
+pprTyVarBndr tyvar
+ = getPprStyle $ \ sty ->
+ if debugStyle sty then
+ hsep [ppr tyvar, dcolon, pprParendKind kind]
+ -- See comments with ppDcolon in PprCore.lhs
+ else
+ ppr tyvar
where
- tys_stuff = specMaybeTysSuffix ty_maybes
-
-pprTyCon sty (SynTyCon uniq name kind arity tyvars expansion)
- = ppBeside (ppr sty name)
- (ifPprShowAll sty
- (ppCat [ ppStr " {-",
- ppInt arity,
- interpp'SP sty tyvars,
- pprParendGenType sty expansion,
- ppStr "-}"]))
-\end{code}
-
+ kind = tyVarKind tyvar
-%************************************************************************
-%* *
-\subsection[Class]{@Class@}
-%* *
-%************************************************************************
-
-\begin{code}
-pprGenClassOp :: Outputable ty => PprStyle -> GenClassOp ty -> Pretty
-
-pprGenClassOp sty op = ppr_class_op sty [] op
-
-ppr_class_op sty tyvars (ClassOp op_name i ty)
- = case sty of
- PprForC -> pp_C
- PprForAsm _ _ -> pp_C
- PprInterface -> ppCat [pp_user, ppPStr SLIT("::"), ppr sty ty]
- PprShowAll -> ppCat [pp_user, ppPStr SLIT("::"), ppr sty ty]
- _ -> pp_user
- where
- pp_C = ppPStr op_name
- pp_user = if isLexVarSym op_name && not (isLexSpecialSym op_name)
- then ppParens pp_C
- else pp_C
+pprTyVarBndrs tyvars = hsep (map pprTyVarBndr tyvars)
\end{code}
%* *
%************************************************************************
-\begin{code}
- -- Shallowly magical; converts a type into something
- -- vaguely close to what can be used in C identifier.
- -- Don't forget to include the module name!!!
-getTypeString :: Type -> [FAST_STRING]
-getTypeString ty
- | is_prelude_ty = [string]
- | otherwise = [mod, string]
- where
- string = _PK_ (tidy (ppShow 1000 ppr_t))
- ppr_t = pprGenType PprForC ty
- -- PprForC expands type synonyms as it goes
-
- (is_prelude_ty, mod)
- = case (maybeAppTyCon ty) of
- Nothing -> true_bottom
- Just (tycon,_) ->
- if isPreludeDefined tycon
- then true_bottom
- else (False, moduleOf (origName tycon))
-
- true_bottom = (True, panic "getTypeString")
-
- --------------------------------------------------
- -- tidy: very ad-hoc
- tidy [] = [] -- done
-
- tidy (' ' : more)
- = case more of
- ' ' : _ -> tidy more
- '-' : '>' : xs -> '-' : '>' : tidy (no_leading_sps xs)
- other -> ' ' : tidy more
-
- tidy (',' : more) = ',' : tidy (no_leading_sps more)
-
- tidy (x : xs) = x : tidy xs -- catch all
-
- no_leading_sps [] = []
- no_leading_sps (' ':xs) = no_leading_sps xs
- no_leading_sps other = other
-
-typeMaybeString :: Maybe Type -> [FAST_STRING]
-typeMaybeString Nothing = [SLIT("!")]
-typeMaybeString (Just t) = getTypeString t
-
-specMaybeTysSuffix :: [Maybe Type] -> FAST_STRING
-specMaybeTysSuffix ty_maybes
- = let
- ty_strs = concat (map typeMaybeString ty_maybes)
- dotted_tys = [ _CONS_ '.' str | str <- ty_strs ]
- in
- _CONCAT_ dotted_tys
-\end{code}
-
-ToDo: possibly move:
-\begin{code}
-nmbrType :: Type -> NmbrM Type
-
-nmbrType (TyVarTy tv)
- = nmbrTyVar tv `thenNmbr` \ new_tv ->
- returnNmbr (TyVarTy new_tv)
-
-nmbrType (AppTy t1 t2)
- = nmbrType t1 `thenNmbr` \ new_t1 ->
- nmbrType t2 `thenNmbr` \ new_t2 ->
- returnNmbr (AppTy new_t1 new_t2)
-
-nmbrType (TyConTy tc use)
- = --nmbrTyCon tc `thenNmbr` \ new_tc ->
- nmbrUsage use `thenNmbr` \ new_use ->
- returnNmbr (TyConTy tc new_use)
-
-nmbrType (SynTy tc args expand)
- = --nmbrTyCon tc `thenNmbr` \ new_tc ->
- mapNmbr nmbrType args `thenNmbr` \ new_args ->
- nmbrType expand `thenNmbr` \ new_expand ->
- returnNmbr (SynTy tc new_args new_expand)
-
-nmbrType (ForAllTy tv ty)
- = addTyVar tv `thenNmbr` \ new_tv ->
- nmbrType ty `thenNmbr` \ new_ty ->
- returnNmbr (ForAllTy new_tv new_ty)
-
-nmbrType (ForAllUsageTy u us ty)
- = addUVar u `thenNmbr` \ new_u ->
- mapNmbr nmbrUVar us `thenNmbr` \ new_us ->
- nmbrType ty `thenNmbr` \ new_ty ->
- returnNmbr (ForAllUsageTy new_u new_us new_ty)
-
-nmbrType (FunTy t1 t2 use)
- = nmbrType t1 `thenNmbr` \ new_t1 ->
- nmbrType t2 `thenNmbr` \ new_t2 ->
- nmbrUsage use `thenNmbr` \ new_use ->
- returnNmbr (FunTy new_t1 new_t2 new_use)
-
-nmbrType (DictTy c ty use)
- = --nmbrClass c `thenNmbr` \ new_c ->
- nmbrType ty `thenNmbr` \ new_ty ->
- nmbrUsage use `thenNmbr` \ new_use ->
- returnNmbr (DictTy c new_ty new_use)
-\end{code}
-
-\begin{code}
-addTyVar, nmbrTyVar :: TyVar -> NmbrM TyVar
-
-addTyVar tv@(TyVar u k maybe_name use) nenv@(NmbrEnv ui ut uu idenv tvenv uvenv)
- = --pprTrace "addTyVar:" (ppCat [pprUnique u, pprUnique ut]) $
- case (lookupUFM_Directly tvenv u) of
- Just xx -> -- pprTrace "addTyVar: already in map!" (ppr PprDebug tv) $
- -- (It gets triggered when we do a datatype: first we
- -- "addTyVar" the tyvars for the datatype as a whole;
- -- we will subsequently "addId" the data cons, including
- -- the type for each of them -- each of which includes
- -- _forall_ ...tvs..., which we will addTyVar.
- -- Harmless, if that's all that happens....
- (nenv, xx)
- Nothing ->
- let
- nenv_plus_tv = NmbrEnv ui (incrUnique ut) uu
- idenv
- (addToUFM_Directly tvenv u new_tv)
- uvenv
-
- (nenv2, new_use) = nmbrUsage use nenv_plus_tv
-
- new_tv = TyVar ut k maybe_name new_use
- in
- (nenv2, new_tv)
-
-nmbrTyVar tv@(TyVar u _ _ _) nenv@(NmbrEnv ui ut uu idenv tvenv uvenv)
- = case (lookupUFM_Directly tvenv u) of
- Just xx -> (nenv, xx)
- Nothing ->
- pprTrace "nmbrTyVar: lookup failed:" (ppCat (ppr PprDebug u : [ppCat [ppr PprDebug x, ppStr "=>", ppr PprDebug tv] | (x,tv) <- ufmToList tvenv])) $
- (nenv, tv)
-\end{code}
-
-nmbrTyCon : only called from ``top-level'', if you know what I mean.
-\begin{code}
-nmbrTyCon tc@FunTyCon = returnNmbr tc
-nmbrTyCon tc@(TupleTyCon _ _ _) = returnNmbr tc
-nmbrTyCon tc@(PrimTyCon _ _ _ _) = returnNmbr tc
-
-nmbrTyCon (DataTyCon u n k tvs theta cons clss nod)
- = --pprTrace "nmbrDataTyCon:" (ppCat (map (ppr PprDebug) tvs)) $
- mapNmbr addTyVar tvs `thenNmbr` \ new_tvs ->
- mapNmbr nmbr_theta theta `thenNmbr` \ new_theta ->
- mapNmbr nmbrId cons `thenNmbr` \ new_cons ->
- returnNmbr (DataTyCon u n k new_tvs new_theta new_cons clss nod)
+Grab a name for the type. This is used to determine the type
+description for profiling.
+
+\begin{code}
+getTyDescription :: Type -> String
+
+getTyDescription ty
+ = case (tcSplitSigmaTy ty) of { (_, _, tau_ty) ->
+ case tau_ty of
+ TyVarTy _ -> "*"
+ AppTy fun _ -> getTyDescription fun
+ FunTy _ res -> '-' : '>' : fun_result res
+ NewTcApp tycon _ -> getOccString tycon
+ TyConApp tycon _ -> getOccString tycon
+ NoteTy (FTVNote _) ty -> getTyDescription ty
+ NoteTy (SynNote ty1) _ -> getTyDescription ty1
+ PredTy sty -> getPredTyDescription sty
+ ForAllTy _ ty -> getTyDescription ty
+ }
where
- nmbr_theta (c,t)
- = --nmbrClass c `thenNmbr` \ new_c ->
- nmbrType t `thenNmbr` \ new_t ->
- returnNmbr (c, new_t)
-
-nmbrTyCon (SynTyCon u n k a tvs expand)
- = mapNmbr addTyVar tvs `thenNmbr` \ new_tvs ->
- nmbrType expand `thenNmbr` \ new_expand ->
- returnNmbr (SynTyCon u n k a new_tvs new_expand)
-
-nmbrTyCon (SpecTyCon tc specs)
- = mapNmbr nmbrMaybeTy specs `thenNmbr` \ new_specs ->
- returnNmbr (SpecTyCon tc new_specs)
-
------------
-nmbrMaybeTy Nothing = returnNmbr Nothing
-nmbrMaybeTy (Just t) = nmbrType t `thenNmbr` \ new_t ->
- returnNmbr (Just new_t)
-\end{code}
-
-\begin{code}
-nmbrClass (Class u n tv supers ssels ops osels odefms instenv isupers)
- = addTyVar tv `thenNmbr` \ new_tv ->
- mapNmbr nmbr_op ops `thenNmbr` \ new_ops ->
- returnNmbr (Class u n new_tv supers ssels new_ops osels odefms instenv isupers)
- where
- nmbr_op (ClassOp n tag ty)
- = nmbrType ty `thenNmbr` \ new_ty ->
- returnNmbr (ClassOp n tag new_ty)
-\end{code}
-
-\begin{code}
-nmbrUsage :: Usage -> NmbrM Usage
-
-nmbrUsage u = returnNmbr u
-{- LATER:
-nmbrUsage u@UsageOne = returnNmbr u
-nmbrUsage u@UsageOmega = returnNmbr u
-nmbrUsage (UsageVar u)
- = nmbrUVar u `thenNmbr` \ new_u ->
- returnNmbr (UsageVar new_u)
--}
-\end{code}
-
-\begin{code}
-addUVar, nmbrUVar :: UVar -> NmbrM UVar
-
-addUVar u nenv@(NmbrEnv ui ut uu idenv tvenv uvenv)
- = case (lookupUFM_Directly uvenv u) of
- Just xx -> _trace "addUVar: already in map!" $
- (nenv, xx)
- Nothing ->
- let
- nenv_plus_uv = NmbrEnv ui ut (incrUnique uu)
- idenv
- tvenv
- (addToUFM_Directly uvenv u new_uv)
- new_uv = uu
- in
- (nenv_plus_uv, new_uv)
-
-nmbrUVar u nenv@(NmbrEnv ui ut uu idenv tvenv uvenv)
- = case (lookupUFM_Directly uvenv u) of
- Just xx -> (nenv, xx)
- Nothing ->
- _trace "nmbrUVar: lookup failed" $
- (nenv, u)
+ fun_result (FunTy _ res) = '>' : fun_result res
+ fun_result other = getTyDescription other
+
+getPredTyDescription (ClassP cl tys) = getOccString cl
+getPredTyDescription (IParam ip ty) = getOccString (ipNameName ip)
+\end{code}
+
+
+\begin{code}
+showTypeCategory :: Type -> Char
+ {-
+ {C,I,F,D} char, int, float, double
+ T tuple
+ S other single-constructor type
+ {c,i,f,d} unboxed ditto
+ t *unpacked* tuple
+ s *unpacked" single-cons...
+
+ v void#
+ a primitive array
+
+ E enumeration type
+ + dictionary, unless it's a ...
+ L List
+ > function
+ M other (multi-constructor) data-con type
+ . other type
+ - reserved for others to mark as "uninteresting"
+ -}
+showTypeCategory ty
+ = if isDictTy ty
+ then '+'
+ else
+ case tcSplitTyConApp_maybe ty of
+ Nothing -> if maybeToBool (tcSplitFunTy_maybe ty)
+ then '>'
+ else '.'
+
+ Just (tycon, _) ->
+ let utc = getUnique tycon in
+ if utc == charDataConKey then 'C'
+ else if utc == intDataConKey then 'I'
+ else if utc == floatDataConKey then 'F'
+ else if utc == doubleDataConKey then 'D'
+ else if utc == smallIntegerDataConKey ||
+ utc == largeIntegerDataConKey then 'J'
+ else if utc == charPrimTyConKey then 'c'
+ else if (utc == intPrimTyConKey || utc == wordPrimTyConKey
+ || utc == addrPrimTyConKey) then 'i'
+ else if utc == floatPrimTyConKey then 'f'
+ else if utc == doublePrimTyConKey then 'd'
+ else if isPrimTyCon tycon {- array, we hope -} then 'A' -- Bogus
+ else if isEnumerationTyCon tycon then 'E'
+ else if isTupleTyCon tycon then 'T'
+ else if maybeToBool (maybeTyConSingleCon tycon) then 'S'
+ else if utc == listTyConKey then 'L'
+ else 'M' -- oh, well...
\end{code}
projects / ghc-hetmet.git / blobdiff