\begin{code}
module HsDecls (
HsDecl(..), TyClDecl(..), InstDecl(..), RuleDecl(..), RuleBndr(..),
- DefaultDecl(..),
- ForeignDecl(..), FoImport(..), FoExport(..), FoType(..),
- ConDecl(..), ConDetails(..),
+ DefaultDecl(..), HsGroup(..),
+ ForeignDecl(..), ForeignImport(..), ForeignExport(..),
+ CImportSpec(..), FoType(..),
+ ConDecl(..), CoreDecl(..),
BangType(..), getBangType, getBangStrictness, unbangedType,
DeprecDecl(..), DeprecTxt,
- hsDeclName, instDeclName,
- tyClDeclName, tyClDeclNames, tyClDeclSysNames, tyClDeclTyVars,
- isClassDecl, isSynDecl, isDataDecl, isIfaceSigDecl, countTyClDecls,
- mkClassDeclSysNames, isIfaceRuleDecl, ifaceRuleDeclName,
- getClassDeclSysNames, conDetailsTys
+ tyClDeclName, tyClDeclNames, tyClDeclTyVars,
+ isClassDecl, isSynDecl, isDataDecl, isIfaceSigDecl,
+ isTypeOrClassDecl, countTyClDecls,
+ isSourceInstDecl, ifaceRuleDeclName,
+ conDetailsTys,
+ collectRuleBndrSigTys, isSrcRule
) where
#include "HsVersions.h"
-- friends:
-import HsBinds ( HsBinds, MonoBinds, Sig(..), FixitySig(..) )
-import HsExpr ( HsExpr )
-import HsImpExp ( ppr_var )
+import {-# SOURCE #-} HsExpr( HsExpr, pprExpr )
+ -- Because Expr imports Decls via HsBracket
+
+import HsBinds ( HsBinds, MonoBinds, Sig(..) )
+import HsPat ( HsConDetails(..), hsConArgs )
+import HsImpExp ( pprHsVar )
import HsTypes
import PprCore ( pprCoreRule )
import HsCore ( UfExpr, UfBinder, HsIdInfo, pprHsIdInfo,
eq_ufBinders, eq_ufExpr, pprUfExpr
)
import CoreSyn ( CoreRule(..), RuleName )
-import BasicTypes ( NewOrData(..), StrictnessMark(..), Activation(..) )
-import ForeignCall ( CExportSpec, CCallSpec, DNCallSpec, CCallConv )
+import BasicTypes ( NewOrData(..), StrictnessMark(..), Activation(..), FixitySig(..) )
+import ForeignCall ( CCallTarget(..), DNCallSpec, CCallConv, Safety,
+ CExportSpec(..))
-- others:
import Name ( NamedThing )
import FunDeps ( pprFundeps )
+import TyCon ( DataConDetails(..), visibleDataCons )
import Class ( FunDep, DefMeth(..) )
import CStrings ( CLabelString )
import Outputable
-import Util ( eqListBy )
+import Util ( eqListBy, count )
import SrcLoc ( SrcLoc )
import FastString
%************************************************************************
\begin{code}
-data HsDecl name pat
- = TyClD (TyClDecl name pat)
- | InstD (InstDecl name pat)
- | DefD (DefaultDecl name)
- | ValD (HsBinds name pat)
- | ForD (ForeignDecl name)
- | FixD (FixitySig name)
- | DeprecD (DeprecDecl name)
- | RuleD (RuleDecl name pat)
+data HsDecl id
+ = TyClD (TyClDecl id)
+ | InstD (InstDecl id)
+ | ValD (MonoBinds id)
+ | SigD (Sig id)
+ | DefD (DefaultDecl id)
+ | ForD (ForeignDecl id)
+ | DeprecD (DeprecDecl id)
+ | RuleD (RuleDecl id)
+ | CoreD (CoreDecl id)
+ | SpliceD (HsExpr id) -- Top level splice
-- NB: all top-level fixity decls are contained EITHER
--- EITHER FixDs
+-- EITHER SigDs
-- OR in the ClassDecls in TyClDs
--
-- The former covers
-- d) top level decls
--
-- The latter is for class methods only
-\end{code}
-
-\begin{code}
-#ifdef DEBUG
-hsDeclName :: (NamedThing name, Outputable name, Outputable pat)
- => HsDecl name pat -> name
-#endif
-hsDeclName (TyClD decl) = tyClDeclName decl
-hsDeclName (InstD decl) = instDeclName decl
-hsDeclName (ForD decl) = forDeclName decl
-hsDeclName (FixD (FixitySig name _ _)) = name
--- Others don't make sense
-#ifdef DEBUG
-hsDeclName x = pprPanic "HsDecls.hsDeclName" (ppr x)
-#endif
-
-
-instDeclName :: InstDecl name pat -> name
-instDeclName (InstDecl _ _ _ (Just name) _) = name
+-- A [HsDecl] is categorised into a HsGroup before being
+-- fed to the renamer.
+data HsGroup id
+ = HsGroup {
+ hs_valds :: HsBinds id,
+ -- Before the renamer, this is a single big MonoBinds,
+ -- with all the bindings, and all the signatures.
+ -- The renamer does dependency analysis, using ThenBinds
+ -- to give the structure
+
+ hs_tyclds :: [TyClDecl id],
+ hs_instds :: [InstDecl id],
+
+ hs_fixds :: [FixitySig id],
+ -- Snaffled out of both top-level fixity signatures,
+ -- and those in class declarations
+
+ hs_defds :: [DefaultDecl id],
+ hs_fords :: [ForeignDecl id],
+ hs_depds :: [DeprecDecl id],
+ hs_ruleds :: [RuleDecl id],
+ hs_coreds :: [CoreDecl id]
+ }
\end{code}
\begin{code}
-instance (NamedThing name, Outputable name, Outputable pat)
- => Outputable (HsDecl name pat) where
-
+instance OutputableBndr name => Outputable (HsDecl name) where
ppr (TyClD dcl) = ppr dcl
ppr (ValD binds) = ppr binds
ppr (DefD def) = ppr def
ppr (InstD inst) = ppr inst
ppr (ForD fd) = ppr fd
- ppr (FixD fd) = ppr fd
+ ppr (SigD sd) = ppr sd
ppr (RuleD rd) = ppr rd
ppr (DeprecD dd) = ppr dd
+ ppr (CoreD dd) = ppr dd
+ ppr (SpliceD e) = ptext SLIT("splice") <> parens (pprExpr e)
+
+instance OutputableBndr name => Outputable (HsGroup name) where
+ ppr (HsGroup { hs_valds = val_decls,
+ hs_tyclds = tycl_decls,
+ hs_instds = inst_decls,
+ hs_fixds = fix_decls,
+ hs_depds = deprec_decls,
+ hs_fords = foreign_decls,
+ hs_defds = default_decls,
+ hs_ruleds = rule_decls,
+ hs_coreds = core_decls })
+ = vcat [ppr_ds fix_decls, ppr_ds default_decls,
+ ppr_ds deprec_decls, ppr_ds rule_decls,
+ ppr val_decls,
+ ppr_ds tycl_decls, ppr_ds inst_decls,
+ ppr_ds foreign_decls, ppr_ds core_decls]
+ where
+ ppr_ds [] = empty
+ ppr_ds ds = text "" $$ vcat (map ppr ds)
\end{code}
relevant type or class decl.
Plan of attack:
- - Make up their occurrence names immediately
- This is done in RdrHsSyn.mkClassDecl, mkTyDecl, mkConDecl
-
- Ensure they "point to" the parent data/class decl
when loading that decl from an interface file
- (See RnHiFiles.getTyClDeclSysNames)
+ (See RnHiFiles.getSysBinders)
+
+ - When typechecking the decl, we build the implicit TyCons and Ids.
+ When doing so we look them up in the name cache (RnEnv.lookupSysName),
+ to ensure correct module and provenance is set
- - When renaming the decl look them up in the name cache,
- ensure correct module and provenance is set
+These are the two places that we have to conjure up the magic derived
+names. (The actual magic is in OccName.mkWorkerOcc, etc.)
Default methods
~~~~~~~~~~~~~~~
instance Foo [Bool] where ...
These might both be dFooList
- - The CoreTidy phase globalises the name, and ensures the occurrence name is
+ - The CoreTidy phase externalises the name, and ensures the occurrence name is
unique (this isn't special to dict funs). So we'd get dFooList and dFooList1.
- We can take this relaxed approach (changing the occurrence name later)
-- for a module. That's why (despite the misnomer) IfaceSig and ForeignType
-- are both in TyClDecl
-data TyClDecl name pat
+data TyClDecl name
= IfaceSig { tcdName :: name, -- It may seem odd to classify an interface-file signature
tcdType :: HsType name, -- as a 'TyClDecl', but it's very convenient.
tcdIdInfo :: [HsIdInfo name],
tcdLoc :: SrcLoc }
| TyData { tcdND :: NewOrData,
- tcdCtxt :: HsContext name, -- context
- tcdName :: name, -- type constructor
- tcdTyVars :: [HsTyVarBndr name], -- type variables
- tcdCons :: [ConDecl name], -- data constructors (empty if abstract)
- tcdNCons :: Int, -- Number of data constructors (valid even if type is abstract)
- tcdDerivs :: Maybe [name], -- derivings; Nothing => not specified
- -- (i.e., derive default); Just [] => derive
- -- *nothing*; Just <list> => as you would
- -- expect...
- tcdSysNames :: DataSysNames name, -- Generic converter functions
- tcdLoc :: SrcLoc
+ tcdCtxt :: HsContext name, -- Context
+ tcdName :: name, -- Type constructor
+ tcdTyVars :: [HsTyVarBndr name], -- Type variables
+ tcdCons :: DataConDetails (ConDecl name), -- Data constructors
+ tcdDerivs :: Maybe (HsContext name), -- Derivings; Nothing => not specified
+ -- Just [] => derive exactly what is asked
+ tcdGeneric :: Maybe Bool, -- Nothing <=> source decl
+ -- Just x <=> interface-file decl;
+ -- x=True <=> generic converter functions available
+ -- We need this for imported data decls, since the
+ -- imported modules may have been compiled with
+ -- different flags to the current compilation unit
+ tcdLoc :: SrcLoc
}
| TySynonym { tcdName :: name, -- type constructor
tcdTyVars :: [HsTyVarBndr name], -- The class type variables
tcdFDs :: [FunDep name], -- Functional dependencies
tcdSigs :: [Sig name], -- Methods' signatures
- tcdMeths :: Maybe (MonoBinds name pat), -- Default methods
- -- Nothing for imported class decls
- -- Just bs for source class decls
- tcdSysNames :: ClassSysNames name,
+ tcdMeths :: Maybe (MonoBinds name), -- Default methods
+ -- Nothing for imported class decls
+ -- Just bs for source class decls
tcdLoc :: SrcLoc
}
\end{code}
Simple classifiers
\begin{code}
-isIfaceSigDecl, isDataDecl, isSynDecl, isClassDecl :: TyClDecl name pat -> Bool
+isIfaceSigDecl, isDataDecl, isSynDecl, isClassDecl :: TyClDecl name -> Bool
isIfaceSigDecl (IfaceSig {}) = True
isIfaceSigDecl other = False
isClassDecl (ClassDecl {}) = True
isClassDecl other = False
+
+isTypeOrClassDecl (ClassDecl {}) = True
+isTypeOrClassDecl (TyData {}) = True
+isTypeOrClassDecl (TySynonym {}) = True
+isTypeOrClassDecl (ForeignType {}) = True
+isTypeOrClassDecl other = False
\end{code}
Dealing with names
\begin{code}
--------------------------------
-tyClDeclName :: TyClDecl name pat -> name
+tyClDeclName :: TyClDecl name -> name
tyClDeclName tycl_decl = tcdName tycl_decl
--------------------------------
-tyClDeclNames :: Eq name => TyClDecl name pat -> [(name, SrcLoc)]
+tyClDeclNames :: Eq name => TyClDecl name -> [(name, SrcLoc)]
-- Returns all the *binding* names of the decl, along with their SrcLocs
-- The first one is guaranteed to be the name of the decl
-- For record fields, the first one counts as the SrcLoc
tyClDeclTyVars (ClassDecl {tcdTyVars = tvs}) = tvs
tyClDeclTyVars (ForeignType {}) = []
tyClDeclTyVars (IfaceSig {}) = []
-
-
---------------------------------
--- The "system names" are extra implicit names *bound* by the decl.
--- They are kept in a list rather than a tuple
--- to make the renamer easier.
-
-type ClassSysNames name = [name]
--- For class decls they are:
--- [tycon, datacon wrapper, datacon worker,
--- superclass selector 1, ..., superclass selector n]
-
-type DataSysNames name = [name]
--- For data decls they are
--- [from, to]
--- where from :: T -> Tring
--- to :: Tring -> T
-
-tyClDeclSysNames :: TyClDecl name pat -> [(name, SrcLoc)]
--- Similar to tyClDeclNames, but returns the "implicit"
--- or "system" names of the declaration
-
-tyClDeclSysNames (ClassDecl {tcdSysNames = names, tcdLoc = loc})
- = [(n,loc) | n <- names]
-tyClDeclSysNames (TyData {tcdCons = cons, tcdSysNames = names, tcdLoc = loc})
- = [(n,loc) | n <- names] ++
- [(wkr_name,loc) | ConDecl _ wkr_name _ _ _ loc <- cons]
-tyClDeclSysNames decl = []
-
-
-mkClassDeclSysNames :: (name, name, name, [name]) -> [name]
-getClassDeclSysNames :: [name] -> (name, name, name, [name])
-mkClassDeclSysNames (a,b,c,ds) = a:b:c:ds
-getClassDeclSysNames (a:b:c:ds) = (a,b,c,ds)
\end{code}
\begin{code}
-instance (NamedThing name, Ord name) => Eq (TyClDecl name pat) where
+instance (NamedThing name, Ord name) => Eq (TyClDecl name) where
-- Used only when building interface files
(==) d1@(IfaceSig {}) d2@(IfaceSig {})
= tcdName d1 == tcdName d2 &&
tcdND d1 == tcdND d2 &&
eqWithHsTyVars (tcdTyVars d1) (tcdTyVars d2) (\ env ->
eq_hsContext env (tcdCtxt d1) (tcdCtxt d2) &&
- eqListBy (eq_ConDecl env) (tcdCons d1) (tcdCons d2)
+ eq_hsCD env (tcdCons d1) (tcdCons d2)
)
(==) d1@(TySynonym {}) d2@(TySynonym {})
(==) _ _ = False -- default case
+eq_hsCD env (DataCons c1) (DataCons c2) = eqListBy (eq_ConDecl env) c1 c2
+eq_hsCD env Unknown Unknown = True
+eq_hsCD env (HasCons n1) (HasCons n2) = n1 == n2
+eq_hsCD env d1 d2 = False
+
eq_hsFD env (ns1,ms1) (ns2,ms2)
= eqListBy (eq_hsVar env) ns1 ns2 && eqListBy (eq_hsVar env) ms1 ms2
GenDefMeth `eq_dm` GenDefMeth = True
DefMeth _ `eq_dm` DefMeth _ = True
dm1 `eq_dm` dm2 = False
-
-
\end{code}
\begin{code}
-countTyClDecls :: [TyClDecl name pat] -> (Int, Int, Int, Int, Int)
+countTyClDecls :: [TyClDecl name] -> (Int, Int, Int, Int, Int)
-- class, data, newtype, synonym decls
countTyClDecls decls
- = (length [() | ClassDecl {} <- decls],
- length [() | TySynonym {} <- decls],
- length [() | IfaceSig {} <- decls],
- length [() | TyData {tcdND = DataType} <- decls],
- length [() | TyData {tcdND = NewType} <- decls])
+ = (count isClassDecl decls,
+ count isSynDecl decls,
+ count isIfaceSigDecl decls,
+ count isDataTy decls,
+ count isNewTy decls)
+ where
+ isDataTy TyData{tcdND=DataType} = True
+ isDataTy _ = False
+
+ isNewTy TyData{tcdND=NewType} = True
+ isNewTy _ = False
\end{code}
\begin{code}
-instance (NamedThing name, Outputable name, Outputable pat)
- => Outputable (TyClDecl name pat) where
+instance OutputableBndr name
+ => Outputable (TyClDecl name) where
ppr (IfaceSig {tcdName = var, tcdType = ty, tcdIdInfo = info})
= getPprStyle $ \ sty ->
- hsep [ if ifaceStyle sty then ppr var else ppr_var var,
- dcolon, ppr ty, pprHsIdInfo info
- ]
+ hsep [ pprHsVar var, dcolon, ppr ty, pprHsIdInfo info ]
ppr (ForeignType {tcdName = tycon})
= hsep [ptext SLIT("foreign import type dotnet"), ppr tycon]
4 (ppr mono_ty)
ppr (TyData {tcdND = new_or_data, tcdCtxt = context, tcdName = tycon,
- tcdTyVars = tyvars, tcdCons = condecls, tcdNCons = ncons,
+ tcdTyVars = tyvars, tcdCons = condecls,
tcdDerivs = derivings})
= pp_tydecl (ptext keyword <+> pp_decl_head context tycon tyvars)
- (pp_condecls condecls ncons)
+ (pp_condecls condecls)
derivings
where
keyword = case new_or_data of
top_matter = ptext SLIT("class") <+> pp_decl_head context clas tyvars <+> pprFundeps fds
ppr_sig sig = ppr sig <> semi
- pp_methods = getPprStyle $ \ sty ->
- if ifaceStyle sty || isNothing methods
+ pp_methods = if isNothing methods
then empty
else ppr (fromJust methods)
-
-pp_decl_head :: Outputable name => HsContext name -> name -> [HsTyVarBndr name] -> SDoc
+
+pp_decl_head :: OutputableBndr name => HsContext name -> name -> [HsTyVarBndr name] -> SDoc
pp_decl_head context thing tyvars = hsep [pprHsContext context, ppr thing, interppSP tyvars]
-pp_condecls [] ncons = ptext SLIT("{- abstract with") <+> int ncons <+> ptext SLIT("constructors -}")
-pp_condecls (c:cs) ncons = equals <+> sep (ppr c : map (\ c -> ptext SLIT("|") <+> ppr c) cs)
+pp_condecls Unknown = ptext SLIT("{- abstract -}")
+pp_condecls (HasCons n) = ptext SLIT("{- abstract with") <+> int n <+> ptext SLIT("constructors -}")
+pp_condecls (DataCons cs) = equals <+> sep (punctuate (ptext SLIT(" |")) (map ppr cs))
pp_tydecl pp_head pp_decl_rhs derivings
= hang pp_head 4 (sep [
pp_decl_rhs,
case derivings of
Nothing -> empty
- Just ds -> hsep [ptext SLIT("deriving"), parens (interpp'SP ds)]
+ Just ds -> hsep [ptext SLIT("deriving"), ppr_hs_context ds]
])
\end{code}
= ConDecl name -- Constructor name; this is used for the
-- DataCon itself, and for the user-callable wrapper Id
- name -- Name of the constructor's 'worker Id'
- -- Filled in as the ConDecl is built
-
[HsTyVarBndr name] -- Existentially quantified type variables
(HsContext name) -- ...and context
-- If both are empty then there are no existentials
- (ConDetails name)
+ (HsConDetails name (BangType name))
SrcLoc
-
-data ConDetails name
- = VanillaCon -- prefix-style con decl
- [BangType name]
-
- | InfixCon -- infix-style con decl
- (BangType name)
- (BangType name)
-
- | RecCon -- record-style con decl
- [([name], BangType name)] -- list of "fields"
\end{code}
\begin{code}
-conDeclsNames :: Eq name => [ConDecl name] -> [(name,SrcLoc)]
+conDeclsNames :: Eq name => DataConDetails (ConDecl name) -> [(name,SrcLoc)]
-- See tyClDeclNames for what this does
-- The function is boringly complicated because of the records
-- And since we only have equality, we have to be a little careful
conDeclsNames cons
- = snd (foldl do_one ([], []) cons)
+ = snd (foldl do_one ([], []) (visibleDataCons cons))
where
- do_one (flds_seen, acc) (ConDecl name _ _ _ details loc)
- = do_details ((name,loc):acc) details
+ do_one (flds_seen, acc) (ConDecl name _ _ (RecCon flds) loc)
+ = (new_flds ++ flds_seen, (name,loc) : [(f,loc) | f <- new_flds] ++ acc)
where
- do_details acc (RecCon flds) = foldl do_fld (flds_seen, acc) flds
- do_details acc other = (flds_seen, acc)
-
- do_fld acc (flds, _) = foldl do_fld1 acc flds
+ new_flds = [ f | (f,_) <- flds, not (f `elem` flds_seen) ]
- do_fld1 (flds_seen, acc) fld
- | fld `elem` flds_seen = (flds_seen,acc)
- | otherwise = (fld:flds_seen, (fld,loc):acc)
+ do_one (flds_seen, acc) (ConDecl name _ _ _ loc)
+ = (flds_seen, (name,loc):acc)
\end{code}
\begin{code}
-conDetailsTys :: ConDetails name -> [HsType name]
-conDetailsTys (VanillaCon btys) = map getBangType btys
-conDetailsTys (InfixCon bty1 bty2) = [getBangType bty1, getBangType bty2]
-conDetailsTys (RecCon fields) = [getBangType bty | (_, bty) <- fields]
+conDetailsTys details = map getBangType (hsConArgs details)
-
-eq_ConDecl env (ConDecl n1 _ tvs1 cxt1 cds1 _)
- (ConDecl n2 _ tvs2 cxt2 cds2 _)
+eq_ConDecl env (ConDecl n1 tvs1 cxt1 cds1 _)
+ (ConDecl n2 tvs2 cxt2 cds2 _)
= n1 == n2 &&
(eq_hsTyVars env tvs1 tvs2 $ \ env ->
eq_hsContext env cxt1 cxt2 &&
eq_ConDetails env cds1 cds2)
-eq_ConDetails env (VanillaCon bts1) (VanillaCon bts2)
+eq_ConDetails env (PrefixCon bts1) (PrefixCon bts2)
= eqListBy (eq_btype env) bts1 bts2
eq_ConDetails env (InfixCon bta1 btb1) (InfixCon bta2 btb2)
= eq_btype env bta1 bta2 && eq_btype env btb1 btb2
\end{code}
\begin{code}
-instance (Outputable name) => Outputable (ConDecl name) where
- ppr (ConDecl con _ tvs cxt con_details loc)
+instance (OutputableBndr name) => Outputable (ConDecl name) where
+ ppr (ConDecl con tvs cxt con_details loc)
= sep [pprHsForAll tvs cxt, ppr_con_details con con_details]
ppr_con_details con (InfixCon ty1 ty2)
= hsep [ppr_bang ty1, ppr con, ppr_bang ty2]
--- ConDecls generated by MkIface.ifaceTyThing always have a VanillaCon, even
+-- ConDecls generated by MkIface.ifaceTyThing always have a PrefixCon, even
-- if the constructor is an infix one. This is because in an interface file
-- we don't distinguish between the two. Hence when printing these for the
-- user, we need to parenthesise infix constructor names.
-ppr_con_details con (VanillaCon tys)
- = getPprStyle $ \ sty ->
- hsep ((if ifaceStyle sty then ppr con else ppr_var con)
- : map (ppr_bang) tys)
+ppr_con_details con (PrefixCon tys)
+ = hsep (pprHsVar con : map ppr_bang tys)
ppr_con_details con (RecCon fields)
= ppr con <+> braces (sep (punctuate comma (map ppr_field fields)))
where
- ppr_field (ns, ty) = hsep (map (ppr) ns) <+>
- dcolon <+>
- ppr_bang ty
+ ppr_field (n, ty) = ppr n <+> dcolon <+> ppr_bang ty
-instance Outputable name => Outputable (BangType name) where
+instance OutputableBndr name => Outputable (BangType name) where
ppr = ppr_bang
ppr_bang (BangType s ty) = ppr s <> pprParendHsType ty
%************************************************************************
\begin{code}
-data InstDecl name pat
+data InstDecl name
= InstDecl (HsType name) -- Context => Class Instance-type
-- Using a polytype means that the renamer conveniently
-- figures out the quantified type variables for us.
- (MonoBinds name pat)
+ (MonoBinds name)
[Sig name] -- User-supplied pragmatic info
-- Nothing for source-file instance decls
SrcLoc
+
+isSourceInstDecl :: InstDecl name -> Bool
+isSourceInstDecl (InstDecl _ _ _ maybe_dfun _) = isNothing maybe_dfun
\end{code}
\begin{code}
-instance (Outputable name, Outputable pat)
- => Outputable (InstDecl name pat) where
+instance (OutputableBndr name) => Outputable (InstDecl name) where
ppr (InstDecl inst_ty binds uprags maybe_dfun_name src_loc)
- = getPprStyle $ \ sty ->
- if ifaceStyle sty then
- hsep [ptext SLIT("instance"), ppr inst_ty, equals, pp_dfun]
- else
- vcat [hsep [ptext SLIT("instance"), ppr inst_ty, ptext SLIT("where")],
- nest 4 (ppr uprags),
- nest 4 (ppr binds) ]
+ = vcat [hsep [ptext SLIT("instance"), ppr inst_ty, ptext SLIT("where")],
+ nest 4 (ppr uprags),
+ nest 4 (ppr binds) ]
where
pp_dfun = case maybe_dfun_name of
Just df -> ppr df
\end{code}
\begin{code}
-instance Ord name => Eq (InstDecl name pat) where
+instance Ord name => Eq (InstDecl name) where
-- Used for interface comparison only, so don't compare bindings
(==) (InstDecl inst_ty1 _ _ dfun1 _) (InstDecl inst_ty2 _ _ dfun2 _)
= inst_ty1 == inst_ty2 && dfun1 == dfun2
= DefaultDecl [HsType name]
SrcLoc
-instance (Outputable name)
+instance (OutputableBndr name)
=> Outputable (DefaultDecl name) where
ppr (DefaultDecl tys src_loc)
%************************************************************************
\begin{code}
+
+-- foreign declarations are distinguished as to whether they define or use a
+-- Haskell name
+--
+-- * the Boolean value indicates whether the pre-standard deprecated syntax
+-- has been used
+--
data ForeignDecl name
- = ForeignImport name (HsType name) FoImport SrcLoc
- | ForeignExport name (HsType name) FoExport SrcLoc
+ = ForeignImport name (HsType name) ForeignImport Bool SrcLoc -- defines name
+ | ForeignExport name (HsType name) ForeignExport Bool SrcLoc -- uses name
-forDeclName (ForeignImport n _ _ _) = n
-forDeclName (ForeignExport n _ _ _) = n
+-- yield the Haskell name defined or used in a foreign declaration
+--
+foreignDeclName :: ForeignDecl name -> name
+foreignDeclName (ForeignImport n _ _ _ _) = n
+foreignDeclName (ForeignExport n _ _ _ _) = n
-data FoImport
- = LblImport CLabelString -- foreign label
- | CImport CCallSpec -- foreign import
- | CDynImport CCallConv -- foreign export dynamic
- | DNImport DNCallSpec -- foreign import dotnet
+-- specification of an imported external entity in dependence on the calling
+-- convention
+--
+data ForeignImport = -- import of a C entity
+ --
+ -- * the two strings specifying a header file or library
+ -- may be empty, which indicates the absence of a
+ -- header or object specification (both are not used
+ -- in the case of `CWrapper' and when `CFunction'
+ -- has a dynamic target)
+ --
+ -- * the calling convention is irrelevant for code
+ -- generation in the case of `CLabel', but is needed
+ -- for pretty printing
+ --
+ -- * `Safety' is irrelevant for `CLabel' and `CWrapper'
+ --
+ CImport CCallConv -- ccall or stdcall
+ Safety -- safe or unsafe
+ FastString -- name of C header
+ FastString -- name of library object
+ CImportSpec -- details of the C entity
+
+ -- import of a .NET function
+ --
+ | DNImport DNCallSpec
+
+-- details of an external C entity
+--
+data CImportSpec = CLabel CLabelString -- import address of a C label
+ | CFunction CCallTarget -- static or dynamic function
+ | CWrapper -- wrapper to expose closures
+ -- (former f.e.d.)
-data FoExport = CExport CExportSpec
+-- specification of an externally exported entity in dependence on the calling
+-- convention
+--
+data ForeignExport = CExport CExportSpec -- contains the calling convention
+ | DNExport -- presently unused
+-- abstract type imported from .NET
+--
data FoType = DNType -- In due course we'll add subtype stuff
- deriving( Eq ) -- Used for equality instance for TyClDecl
+ deriving (Eq) -- Used for equality instance for TyClDecl
-instance Outputable name => Outputable (ForeignDecl name) where
- ppr (ForeignImport nm ty (LblImport lbl) src_loc)
- = ptext SLIT("foreign label") <+> ppr lbl <+> ppr nm <+> dcolon <+> ppr ty
- ppr (ForeignImport nm ty decl src_loc)
- = ptext SLIT("foreign import") <+> ppr decl <+> ppr nm <+> dcolon <+> ppr ty
- ppr (ForeignExport nm ty decl src_loc)
- = ptext SLIT("foreign export") <+> ppr decl <+> ppr nm <+> dcolon <+> ppr ty
-instance Outputable FoImport where
- ppr (CImport d) = ppr d
- ppr (CDynImport conv) = text "dynamic" <+> ppr conv
- ppr (DNImport d) = ptext SLIT("dotnet") <+> ppr d
- ppr (LblImport l) = ptext SLIT("label") <+> ppr l
+-- pretty printing of foreign declarations
+--
-instance Outputable FoExport where
- ppr (CExport d) = ppr d
+instance OutputableBndr name => Outputable (ForeignDecl name) where
+ ppr (ForeignImport n ty fimport _ _) =
+ ptext SLIT("foreign import") <+> ppr fimport <+>
+ ppr n <+> dcolon <+> ppr ty
+ ppr (ForeignExport n ty fexport _ _) =
+ ptext SLIT("foreign export") <+> ppr fexport <+>
+ ppr n <+> dcolon <+> ppr ty
+
+instance Outputable ForeignImport where
+ ppr (DNImport spec) =
+ ptext SLIT("dotnet") <+> ppr spec
+ ppr (CImport cconv safety header lib spec) =
+ ppr cconv <+> ppr safety <+>
+ char '"' <> pprCEntity header lib spec <> char '"'
+ where
+ pprCEntity header lib (CLabel lbl) =
+ ptext SLIT("static") <+> ftext header <+> char '&' <>
+ pprLib lib <> ppr lbl
+ pprCEntity header lib (CFunction (StaticTarget lbl)) =
+ ptext SLIT("static") <+> ftext header <+> char '&' <>
+ pprLib lib <> ppr lbl
+ pprCEntity header lib (CFunction (DynamicTarget)) =
+ ptext SLIT("dynamic")
+ pprCEntity header lib (CFunction (CasmTarget _)) =
+ panic "HsDecls.pprCEntity: malformed C function target"
+ pprCEntity _ _ (CWrapper) = ptext SLIT("wrapper")
+ --
+ pprLib lib | nullFastString lib = empty
+ | otherwise = char '[' <> ppr lib <> char ']'
+
+instance Outputable ForeignExport where
+ ppr (CExport (CExportStatic lbl cconv)) =
+ ppr cconv <+> char '"' <> ppr lbl <> char '"'
+ ppr (DNExport ) =
+ ptext SLIT("dotnet") <+> ptext SLIT("\"<unused>\"")
instance Outputable FoType where
- ppr DNType = ptext SLIT("type dotnet")
+ ppr DNType = ptext SLIT("type dotnet")
\end{code}
%************************************************************************
\begin{code}
-data RuleDecl name pat
+data RuleDecl name
= HsRule -- Source rule
RuleName -- Rule name
Activation
- [name] -- Forall'd tyvars, filled in by the renamer with
- -- tyvars mentioned in sigs; then filled out by typechecker
- [RuleBndr name] -- Forall'd term vars
- (HsExpr name pat) -- LHS
- (HsExpr name pat) -- RHS
+ [RuleBndr name] -- Forall'd vars; after typechecking this includes tyvars
+ (HsExpr name) -- LHS
+ (HsExpr name) -- RHS
SrcLoc
| IfaceRule -- One that's come in from an interface file; pre-typecheck
name -- Head of LHS
CoreRule
-isIfaceRuleDecl :: RuleDecl name pat -> Bool
-isIfaceRuleDecl (HsRule _ _ _ _ _ _ _) = False
-isIfaceRuleDecl other = True
+isSrcRule (HsRule _ _ _ _ _ _) = True
+isSrcRule other = False
-ifaceRuleDeclName :: RuleDecl name pat -> name
+ifaceRuleDeclName :: RuleDecl name -> name
ifaceRuleDeclName (IfaceRule _ _ _ n _ _ _) = n
ifaceRuleDeclName (IfaceRuleOut n r) = n
-ifaceRuleDeclName (HsRule fs _ _ _ _ _ _) = pprPanic "ifaceRuleDeclName" (ppr fs)
+ifaceRuleDeclName (HsRule fs _ _ _ _ _) = pprPanic "ifaceRuleDeclName" (ppr fs)
data RuleBndr name
= RuleBndr name
| RuleBndrSig name (HsType name)
-instance (NamedThing name, Ord name) => Eq (RuleDecl name pat) where
+collectRuleBndrSigTys :: [RuleBndr name] -> [HsType name]
+collectRuleBndrSigTys bndrs = [ty | RuleBndrSig _ ty <- bndrs]
+
+instance (NamedThing name, Ord name) => Eq (RuleDecl name) where
-- Works for IfaceRules only; used when comparing interface file versions
(IfaceRule n1 a1 bs1 f1 es1 rhs1 _) == (IfaceRule n2 a2 bs2 f2 es2 rhs2 _)
= n1==n2 && f1 == f2 && a1==a2 &&
eq_ufBinders emptyEqHsEnv bs1 bs2 (\env ->
eqListBy (eq_ufExpr env) (rhs1:es1) (rhs2:es2))
-instance (NamedThing name, Outputable name, Outputable pat)
- => Outputable (RuleDecl name pat) where
- ppr (HsRule name act tvs ns lhs rhs loc)
- = sep [text "{-# RULES" <+> doubleQuotes (ptext name) <+> ppr act,
- pp_forall, ppr lhs, equals <+> ppr rhs,
+instance OutputableBndr name => Outputable (RuleDecl name) where
+ ppr (HsRule name act ns lhs rhs loc)
+ = sep [text "{-# RULES" <+> doubleQuotes (ftext name) <+> ppr act,
+ pp_forall, pprExpr lhs, equals <+> pprExpr rhs,
text "#-}" ]
where
- pp_forall | null tvs && null ns = empty
- | otherwise = text "forall" <+>
- fsep (map ppr tvs ++ map ppr ns)
- <> dot
+ pp_forall | null ns = empty
+ | otherwise = text "forall" <+> fsep (map ppr ns) <> dot
ppr (IfaceRule name act tpl_vars fn tpl_args rhs loc)
- = hsep [ doubleQuotes (ptext name), ppr act,
+ = hsep [ doubleQuotes (ftext name), ppr act,
ptext SLIT("__forall") <+> braces (interppSP tpl_vars),
ppr fn <+> sep (map (pprUfExpr parens) tpl_args),
ptext SLIT("=") <+> ppr rhs
ppr (IfaceRuleOut fn rule) = pprCoreRule (ppr fn) rule
-instance Outputable name => Outputable (RuleBndr name) where
+instance OutputableBndr name => Outputable (RuleBndr name) where
ppr (RuleBndr name) = ppr name
ppr (RuleBndrSig name ty) = ppr name <> dcolon <> ppr ty
\end{code}
\begin{code}
data DeprecDecl name = Deprecation name DeprecTxt SrcLoc
-type DeprecTxt = FAST_STRING -- reason/explanation for deprecation
+type DeprecTxt = FastString -- reason/explanation for deprecation
-instance Outputable name => Outputable (DeprecDecl name) where
+instance OutputableBndr name => Outputable (DeprecDecl name) where
ppr (Deprecation thing txt _)
= hsep [text "{-# DEPRECATED", ppr thing, doubleQuotes (ppr txt), text "#-}"]
\end{code}
+
+
+%************************************************************************
+%* *
+ External-core declarations
+%* *
+%************************************************************************
+
+\begin{code}
+data CoreDecl name -- a Core value binding (from 'external Core' input)
+ = CoreDecl name
+ (HsType name)
+ (UfExpr name)
+ SrcLoc
+
+instance OutputableBndr name => Outputable (CoreDecl name) where
+ ppr (CoreDecl var ty rhs loc)
+ = getPprStyle $ \ sty ->
+ hsep [ pprHsVar var, dcolon, ppr ty, ppr rhs ]
+\end{code}
projects / ghc-hetmet.git / blobdiff