@InstDecl@, @DefaultDecl@.
\begin{code}
-#include "HsVersions.h"
-
module HsDecls where
-IMP_Ubiq()
+#include "HsVersions.h"
-- friends:
import HsBinds ( HsBinds, MonoBinds, Sig, nullMonoBinds )
InstancePragmas, ClassOpPragmas
)
import HsTypes
-import IdInfo
-import SpecEnv ( SpecEnv )
import HsCore ( UfExpr )
+import BasicTypes ( Fixity, NewOrData(..) )
+import IdInfo ( ArgUsageInfo, FBTypeInfo, ArityInfo, UpdateInfo )
+import Demand ( Demand )
-- others:
-import Name ( pprSym, pprNonSym, getOccName, OccName )
-import Outputable ( interppSP, interpp'SP,
- Outputable(..){-instance * []-}
- )
-import Pretty
+import Name ( getOccName, OccName, NamedThing(..) )
+import Outputable
import SrcLoc ( SrcLoc )
-import PprStyle ( PprStyle(..) )
+import Util
\end{code}
%************************************************************************
\begin{code}
-data HsDecl tyvar uvar name pat
+data HsDecl flexi name pat
= TyD (TyDecl name)
- | ClD (ClassDecl tyvar uvar name pat)
- | InstD (InstDecl tyvar uvar name pat)
+ | ClD (ClassDecl flexi name pat)
+ | InstD (InstDecl flexi name pat)
| DefD (DefaultDecl name)
- | ValD (HsBinds tyvar uvar name pat)
+ | ValD (HsBinds flexi name pat)
| SigD (IfaceSig name)
\end{code}
\begin{code}
-hsDeclName (TyD (TyData _ name _ _ _ _ _)) = name
-hsDeclName (TyD (TyNew _ name _ _ _ _ _)) = name
-hsDeclName (TyD (TySynonym name _ _ _)) = name
-hsDeclName (ClD (ClassDecl _ name _ _ _ _ _)) = name
-hsDeclName (SigD (IfaceSig name _ _ _)) = name
+#ifdef DEBUG
+hsDeclName :: (NamedThing name, Outputable name, Outputable pat)
+ => HsDecl flexi name pat -> name
+#endif
+hsDeclName (TyD (TyData _ _ name _ _ _ _ _)) = name
+hsDeclName (TyD (TySynonym name _ _ _)) = name
+hsDeclName (ClD (ClassDecl _ name _ _ _ _ _ _ _)) = name
+hsDeclName (SigD (IfaceSig name _ _ _)) = name
+hsDeclName (InstD (InstDecl _ _ _ (Just name) _)) = name
-- Others don't make sense
+#ifdef DEBUG
+hsDeclName x = pprPanic "HsDecls.hsDeclName" (ppr x)
+#endif
\end{code}
\begin{code}
-instance (NamedThing name, Outputable name, Outputable pat,
- Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => Outputable (HsDecl tyvar uvar name pat) where
-
- ppr sty (TyD td) = ppr sty td
- ppr sty (ClD cd) = ppr sty cd
- ppr sty (SigD sig) = ppr sty sig
- ppr sty (ValD binds) = ppr sty binds
- ppr sty (DefD def) = ppr sty def
- ppr sty (InstD inst) = ppr sty inst
+instance (NamedThing name, Outputable name, Outputable pat)
+ => Outputable (HsDecl flexi name pat) where
+
+ ppr (TyD td) = ppr td
+ ppr (ClD cd) = ppr cd
+ ppr (SigD sig) = ppr sig
+ ppr (ValD binds) = ppr binds
+ ppr (DefD def) = ppr def
+ ppr (InstD inst) = ppr inst
+
+#ifdef DEBUG
+-- hsDeclName needs more context when DEBUG is on
+instance (NamedThing name, Outputable name, Outputable pat, Eq name)
+ => Eq (HsDecl flex name pat) where
+ d1 == d2 = hsDeclName d1 == hsDeclName d2
+
+instance (NamedThing name, Outputable name, Outputable pat, Ord name)
+ => Ord (HsDecl flex name pat) where
+ d1 `compare` d2 = hsDeclName d1 `compare` hsDeclName d2
+#else
+instance (Eq name) => Eq (HsDecl flex name pat) where
+ d1 == d2 = hsDeclName d1 == hsDeclName d2
+
+instance (Ord name) => Ord (HsDecl flexi name pat) where
+ d1 `compare` d2 = hsDeclName d1 `compare` hsDeclName d2
+#endif
\end{code}
data FixityDecl name = FixityDecl name Fixity SrcLoc
instance Outputable name => Outputable (FixityDecl name) where
- ppr sty (FixityDecl name fixity loc) = ppSep [ppr sty fixity, ppr sty name]
-\end{code}
-
-It's convenient to keep the source location in the @Fixity@; it makes error reporting
-in the renamer easier.
-
-\begin{code}
-data Fixity = Fixity Int FixityDirection
-data FixityDirection = InfixL | InfixR | InfixN
- deriving(Eq)
-
-instance Outputable Fixity where
- ppr sty (Fixity prec dir) = ppBesides [ppr sty dir, ppSP, ppInt prec]
-
-instance Outputable FixityDirection where
- ppr sty InfixL = ppStr "infixl"
- ppr sty InfixR = ppStr "infixr"
- ppr sty InfixN = ppStr "infix"
-
-instance Eq Fixity where -- Used to determine if two fixities conflict
- (Fixity p1 dir1) == (Fixity p2 dir2) = p1==p2 && dir1 == dir2
+ ppr (FixityDecl name fixity loc) = sep [ppr fixity, ppr name]
\end{code}
\begin{code}
data TyDecl name
- = TyData (Context name) -- context
+ = TyData NewOrData
+ (Context name) -- context
name -- type constructor
[HsTyVar name] -- type variables
[ConDecl name] -- data constructors (empty if abstract)
(DataPragmas name)
SrcLoc
- | TyNew (Context name) -- context
- name -- type constructor
- [HsTyVar name] -- type variables
- (ConDecl name) -- data constructor
- (Maybe [name]) -- derivings; as above
- (DataPragmas name)
- SrcLoc
-
| TySynonym name -- type constructor
[HsTyVar name] -- type variables
(HsType name) -- synonym expansion
instance (NamedThing name, Outputable name)
=> Outputable (TyDecl name) where
- ppr sty (TySynonym tycon tyvars mono_ty src_loc)
- = ppHang (pp_decl_head sty SLIT("type") ppNil tycon tyvars)
- 4 (ppr sty mono_ty)
+ ppr (TySynonym tycon tyvars mono_ty src_loc)
+ = hang (pp_decl_head SLIT("type") empty tycon tyvars)
+ 4 (ppr mono_ty)
- ppr sty (TyData context tycon tyvars condecls derivings pragmas src_loc)
- = pp_tydecl sty
- (pp_decl_head sty SLIT("data") (pp_context_and_arrow sty context) tycon tyvars)
- (pp_condecls sty condecls)
- derivings
-
- ppr sty (TyNew context tycon tyvars condecl derivings pragmas src_loc)
- = pp_tydecl sty
- (pp_decl_head sty SLIT("newtype") (pp_context_and_arrow sty context) tycon tyvars)
- (ppr sty condecl)
+ ppr (TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc)
+ = pp_tydecl
+ (pp_decl_head keyword (pp_context_and_arrow context) tycon tyvars)
+ (pp_condecls condecls)
derivings
+ where
+ keyword = case new_or_data of
+ NewType -> SLIT("newtype")
+ DataType -> SLIT("data")
-pp_decl_head sty str pp_context tycon tyvars
- = ppCat [ppPStr str, pp_context, ppr sty (getOccName tycon),
- interppSP sty tyvars, ppPStr SLIT("=")]
+pp_decl_head str pp_context tycon tyvars
+ = hsep [ptext str, pp_context, ppr tycon,
+ interppSP tyvars, ptext SLIT("=")]
-pp_condecls sty [] = ppNil -- Curious!
-pp_condecls sty (c:cs)
- = ppSep (ppr sty c : map (\ c -> ppBeside (ppStr "| ") (ppr sty c)) cs)
+pp_condecls [] = empty -- Curious!
+pp_condecls (c:cs)
+ = sep (ppr c : map (\ c -> (<>) (ptext SLIT("| ")) (ppr c)) cs)
-pp_tydecl sty pp_head pp_decl_rhs derivings
- = ppHang pp_head 4 (ppSep [
+pp_tydecl pp_head pp_decl_rhs derivings
+ = hang pp_head 4 (sep [
pp_decl_rhs,
- case (derivings, sty) of
- (Nothing,_) -> ppNil
- (_,PprInterface) -> ppNil -- No derivings in interfaces
- (Just ds,_) -> ppCat [ppPStr SLIT("deriving"), ppParens (interpp'SP sty ds)]
+ case derivings of
+ Nothing -> empty
+ Just ds -> hsep [ptext SLIT("deriving"), parens (interpp'SP ds)]
])
-pp_context_and_arrow :: Outputable name => PprStyle -> Context name -> Pretty
-pp_context_and_arrow sty [] = ppNil
-pp_context_and_arrow sty theta = ppCat [pprContext sty theta, ppPStr SLIT("=>")]
+pp_context_and_arrow :: Outputable name => Context name -> SDoc
+pp_context_and_arrow [] = empty
+pp_context_and_arrow theta = hsep [pprContext theta, ptext SLIT("=>")]
\end{code}
A type for recording what types a datatype should be specialised to.
instance (NamedThing name, Outputable name)
=> Outputable (SpecDataSig name) where
- ppr sty (SpecDataSig tycon ty _)
- = ppCat [ppStr "{-# SPECIALIZE data", ppr sty ty, ppStr "#-}"]
+ ppr (SpecDataSig tycon ty _)
+ = hsep [text "{-# SPECIALIZE data", ppr ty, text "#-}"]
\end{code}
%************************************************************************
\begin{code}
data ConDecl name
- = ConDecl name -- prefix-style con decl
- [BangType name]
+ = ConDecl name -- Constructor name
+ (Context name) -- Existential context for this constructor
+ (ConDetails name)
SrcLoc
- | ConOpDecl (BangType name) -- infix-style con decl
- name
+data ConDetails name
+ = VanillaCon -- prefix-style con decl
+ [BangType name]
+
+ | InfixCon -- infix-style con decl
+ (BangType name)
(BangType name)
- SrcLoc
- | RecConDecl name
+ | RecCon -- record-style con decl
[([name], BangType name)] -- list of "fields"
- SrcLoc
- | NewConDecl name -- newtype con decl
+ | NewCon -- newtype con decl
(HsType name)
- SrcLoc
data BangType name
= Banged (HsType name) -- HsType: to allow Haskell extensions
\begin{code}
instance (NamedThing name, Outputable name) => Outputable (ConDecl name) where
+ ppr (ConDecl con cxt con_details loc)
+ = pp_context_and_arrow cxt <+> ppr_con_details con con_details
- ppr sty (ConDecl con tys _)
- = ppCat [ppr sty (getOccName con), ppInterleave ppNil (map (ppr_bang sty) tys)]
-
- -- We print ConOpDecls in prefix form in interface files
- ppr PprInterface (ConOpDecl ty1 op ty2 _)
- = ppCat [ppr PprInterface (getOccName op), ppr_bang PprInterface ty1, ppr_bang PprInterface ty2]
- ppr sty (ConOpDecl ty1 op ty2 _)
- = ppCat [ppr_bang sty ty1, ppr sty (getOccName op), ppr_bang sty ty2]
-
- ppr sty (NewConDecl con ty _)
- = ppCat [ppr sty (getOccName con), pprParendHsType sty ty]
- ppr sty (RecConDecl con fields _)
- = ppCat [ppr sty (getOccName con),
- ppCurlies (ppInterleave pp'SP (map pp_field fields))
- ]
- where
- pp_field (n, ty) = ppCat [ppr sty n, ppPStr SLIT("::"), ppr_bang sty ty]
+ppr_con_details con (InfixCon ty1 ty2)
+ = hsep [ppr_bang ty1, ppr con, ppr_bang ty2]
+
+ppr_con_details con (VanillaCon tys)
+ = ppr con <+> hsep (map (ppr_bang) tys)
-ppr_bang sty (Banged ty) = ppBeside (ppChar '!') (pprParendHsType sty ty)
-ppr_bang sty (Unbanged ty) = pprParendHsType sty ty
+ppr_con_details con (NewCon ty)
+ = ppr con <+> pprParendHsType ty
+
+ppr_con_details con (RecCon fields)
+ = ppr con <+> braces (hsep (punctuate comma (map ppr_field fields)))
+ where
+ ppr_field (ns, ty) = hsep (map (ppr) ns) <+>
+ ptext SLIT("::") <+>
+ ppr_bang ty
+
+ppr_bang (Banged ty) = ptext SLIT("!") <> pprParendHsType ty
+ppr_bang (Unbanged ty) = pprParendHsType ty
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
-data ClassDecl tyvar uvar name pat
+data ClassDecl flexi name pat
= ClassDecl (Context name) -- context...
name -- name of the class
- (HsTyVar name) -- the class type variable
+ [HsTyVar name] -- the class type variables
[Sig name] -- methods' signatures
- (MonoBinds tyvar uvar name pat) -- default methods
+ (MonoBinds flexi name pat) -- default methods
(ClassPragmas name)
+ name name -- The names of the tycon and datacon for this class
+ -- These are filled in by the renamer
SrcLoc
\end{code}
\begin{code}
-instance (NamedThing name, Outputable name, Outputable pat,
- Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => Outputable (ClassDecl tyvar uvar name pat) where
+instance (NamedThing name, Outputable name, Outputable pat)
+ => Outputable (ClassDecl flexi name pat) where
- ppr sty (ClassDecl context clas tyvar sigs methods pragmas src_loc)
+ ppr (ClassDecl context clas tyvars sigs methods pragmas _ _ src_loc)
| null sigs -- No "where" part
= top_matter
- | iface_style -- All on one line (for now at least)
- = ppCat [top_matter, ppStr "where",
- ppCurlies (ppInterleave (ppPStr SLIT("; ")) pp_sigs)]
-
| otherwise -- Laid out
- = ppSep [ppCat [top_matter, ppStr "where {"],
- ppNest 4 ((ppIntersperse ppSemi pp_sigs `ppAbove` pp_methods)
- `ppBeside` ppStr "}")]
+ = sep [hsep [top_matter, ptext SLIT("where {")],
+ nest 4 (vcat [sep (map ppr_sig sigs),
+ ppr methods,
+ char '}'])]
where
- top_matter = ppCat [ppStr "class", pp_context_and_arrow sty context,
- ppr sty (getOccName clas), ppr sty tyvar]
- pp_sigs = map (ppr sty) sigs
- pp_methods = ppr sty methods
- iface_style = case sty of {PprInterface -> True; other -> False}
+ top_matter = hsep [ptext SLIT("class"), pp_context_and_arrow context,
+ ppr clas, hsep (map (ppr) tyvars)]
+ ppr_sig sig = ppr sig <> semi
\end{code}
%************************************************************************
%************************************************************************
\begin{code}
-data InstDecl tyvar uvar name pat
+data InstDecl flexi name pat
= InstDecl (HsType name) -- Context => Class Instance-type
-- Using a polytype means that the renamer conveniently
-- figures out the quantified type variables for us.
- (MonoBinds tyvar uvar name pat)
+ (MonoBinds flexi name pat)
[Sig name] -- User-supplied pragmatic info
\end{code}
\begin{code}
-instance (NamedThing name, Outputable name, Outputable pat,
- Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => Outputable (InstDecl tyvar uvar name pat) where
-
- ppr sty (InstDecl inst_ty binds uprags dfun_name src_loc)
- | case sty of { PprInterface -> True; other -> False} ||
- nullMonoBinds binds && null uprags
- = ppCat [ppStr "instance", ppr sty inst_ty]
-
- | otherwise
- = ppAboves [ppCat [ppStr "instance", ppr sty inst_ty, ppStr "where"],
- ppNest 4 (ppr sty uprags),
- ppNest 4 (ppr sty binds) ]
+instance (NamedThing name, Outputable name, Outputable pat)
+ => Outputable (InstDecl flexi name pat) where
+
+ ppr (InstDecl inst_ty binds uprags dfun_name src_loc)
+ = getPprStyle $ \ sty ->
+ if ifaceStyle sty || (nullMonoBinds binds && null uprags) then
+ hsep [ptext SLIT("instance"), ppr inst_ty]
+ else
+ vcat [hsep [ptext SLIT("instance"), ppr inst_ty, ptext SLIT("where")],
+ nest 4 (ppr uprags),
+ nest 4 (ppr binds) ]
\end{code}
A type for recording what instances the user wants to specialise;
instance (NamedThing name, Outputable name)
=> Outputable (SpecInstSig name) where
- ppr sty (SpecInstSig clas ty _)
- = ppCat [ppStr "{-# SPECIALIZE instance", ppr sty clas, ppr sty ty, ppStr "#-}"]
+ ppr (SpecInstSig clas ty _)
+ = hsep [text "{-# SPECIALIZE instance", ppr clas, ppr ty, text "#-}"]
\end{code}
%************************************************************************
instance (NamedThing name, Outputable name)
=> Outputable (DefaultDecl name) where
- ppr sty (DefaultDecl tys src_loc)
- = ppBeside (ppPStr SLIT("default ")) (ppParens (interpp'SP sty tys))
+ ppr (DefaultDecl tys src_loc)
+ = ptext SLIT("default") <+> parens (interpp'SP tys)
\end{code}
%************************************************************************
SrcLoc
instance (NamedThing name, Outputable name) => Outputable (IfaceSig name) where
- ppr sty (IfaceSig var ty _ _)
- = ppHang (ppCat [ppr sty (getOccName var), ppPStr SLIT("::")])
- 4 (ppr sty ty)
+ ppr (IfaceSig var ty _ _)
+ = hang (hsep [ppr var, ptext SLIT("::")])
+ 4 (ppr ty)
data HsIdInfo name
= HsArity ArityInfo
- | HsStrictness (StrictnessInfo name)
- | HsUnfold (UfExpr name)
+ | HsStrictness (HsStrictnessInfo name)
+ | HsUnfold Bool (UfExpr name) -- True <=> INLINE pragma
| HsUpdate UpdateInfo
- | HsDeforest DeforestInfo
| HsArgUsage ArgUsageInfo
| HsFBType FBTypeInfo
-- ToDo: specialisations
+
+data HsStrictnessInfo name
+ = HsStrictnessInfo [Demand]
+ (Maybe (name, [name])) -- Worker, if any
+ -- and needed constructors
+ | HsBottom
\end{code}
projects / ghc-hetmet.git / blobdiff