\begin{code}
module HsDecls (
- HsDecl(..), TyClDecl(..), InstDecl(..), RuleDecl(..), RuleBndr(..),
- DefaultDecl(..), HsGroup(..), SpliceDecl(..),
- ForeignDecl(..), ForeignImport(..), ForeignExport(..),
+ HsDecl(..), LHsDecl, TyClDecl(..), LTyClDecl,
+ InstDecl(..), LInstDecl, NewOrData(..),
+ RuleDecl(..), LRuleDecl, RuleBndr(..),
+ DefaultDecl(..), LDefaultDecl, HsGroup(..), SpliceDecl(..),
+ ForeignDecl(..), LForeignDecl, ForeignImport(..), ForeignExport(..),
CImportSpec(..), FoType(..),
- ConDecl(..), CoreDecl(..),
- BangType(..), getBangType, getBangStrictness, unbangedType,
- DeprecDecl(..), DeprecTxt,
- tyClDeclName, tyClDeclNames, tyClDeclTyVars,
- isClassDecl, isSynDecl, isDataDecl, isIfaceSigDecl,
- isTypeOrClassDecl, countTyClDecls,
- isSourceInstDecl, instDeclDFun, ifaceRuleDeclName,
+ ConDecl(..), LConDecl,
+ LBangType, BangType(..), HsBang(..),
+ getBangType, getBangStrictness, unbangedType,
+ DeprecDecl(..), LDeprecDecl,
+ tcdName, tyClDeclNames, tyClDeclTyVars,
+ isClassDecl, isSynDecl, isDataDecl,
+ countTyClDecls,
conDetailsTys,
- collectRuleBndrSigTys, isSrcRule
+ collectRuleBndrSigTys,
) where
#include "HsVersions.h"
import {-# SOURCE #-} HsExpr( HsExpr, pprExpr )
-- Because Expr imports Decls via HsBracket
-import HsBinds ( HsBinds, MonoBinds, Sig(..) )
+import HsBinds ( HsBindGroup, HsBind, LHsBinds,
+ Sig(..), LSig, LFixitySig, pprLHsBinds )
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(..), FixitySig(..) )
+import HscTypes ( DeprecTxt )
+import CoreSyn ( RuleName )
+import BasicTypes ( Activation(..) )
import ForeignCall ( CCallTarget(..), DNCallSpec, CCallConv, Safety,
- CExportSpec(..))
+ CExportSpec(..), CLabelString )
-- others:
-import Name ( NamedThing )
import FunDeps ( pprFundeps )
-import TyCon ( DataConDetails(..), visibleDataCons )
-import Class ( FunDep, DefMeth(..) )
-import CStrings ( CLabelString )
+import Class ( FunDep )
import Outputable
-import Util ( eqListBy, count )
-import SrcLoc ( SrcLoc )
+import Util ( count )
+import SrcLoc ( Located(..), unLoc )
import FastString
-
-import Maybe ( isNothing, fromJust )
\end{code}
%************************************************************************
\begin{code}
+type LHsDecl id = Located (HsDecl id)
+
data HsDecl id
= TyClD (TyClDecl id)
| InstD (InstDecl id)
- | ValD (MonoBinds id)
+ | ValD (HsBind id)
| SigD (Sig id)
| DefD (DefaultDecl id)
| ForD (ForeignDecl id)
| DeprecD (DeprecDecl id)
| RuleD (RuleDecl id)
- | CoreD (CoreDecl id)
| SpliceD (SpliceDecl id)
-- NB: all top-level fixity decls are contained EITHER
-- fed to the renamer.
data HsGroup id
= HsGroup {
- hs_valds :: HsBinds id,
- -- Before the renamer, this is a single big MonoBinds,
+ hs_valds :: [HsBindGroup id],
+ -- Before the renamer, this is a single big HsBindGroup,
-- with all the bindings, and all the signatures.
- -- The renamer does dependency analysis, using ThenBinds
- -- to give the structure
+ -- The renamer does dependency analysis, splitting it up
+ -- into several HsBindGroups.
- hs_tyclds :: [TyClDecl id],
- hs_instds :: [InstDecl id],
+ hs_tyclds :: [LTyClDecl id],
+ hs_instds :: [LInstDecl id],
- hs_fixds :: [FixitySig id],
+ hs_fixds :: [LFixitySig 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]
+ hs_defds :: [LDefaultDecl id],
+ hs_fords :: [LForeignDecl id],
+ hs_depds :: [LDeprecDecl id],
+ hs_ruleds :: [LRuleDecl id]
}
\end{code}
ppr (SigD sd) = ppr sd
ppr (RuleD rd) = ppr rd
ppr (DeprecD dd) = ppr dd
- ppr (CoreD dd) = ppr dd
ppr (SpliceD dd) = ppr dd
instance OutputableBndr name => Outputable (HsGroup name) where
hs_depds = deprec_decls,
hs_fords = foreign_decls,
hs_defds = default_decls,
- hs_ruleds = rule_decls,
- hs_coreds = core_decls })
+ hs_ruleds = rule_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]
+ ppr_ds foreign_decls]
where
ppr_ds [] = empty
ppr_ds ds = text "" $$ vcat (map ppr ds)
-data SpliceDecl id = SpliceDecl (HsExpr id) SrcLoc -- Top level splice
+data SpliceDecl id = SpliceDecl (Located (HsExpr id)) -- Top level splice
instance OutputableBndr name => Outputable (SpliceDecl name) where
- ppr (SpliceDecl e _) = ptext SLIT("$") <> parens (pprExpr e)
+ ppr (SpliceDecl e) = ptext SLIT("$") <> parens (pprExpr (unLoc e))
\end{code}
THE NAMING STORY
--------------------------------
-Here is the story about the implicit names that go with type, class, and instance
-decls. It's a bit tricky, so pay attention!
+Here is the story about the implicit names that go with type, class,
+and instance decls. It's a bit tricky, so pay attention!
"Implicit" (or "system") binders
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
the worker for that constructor
a selector for each superclass
-All have occurrence names that are derived uniquely from their parent declaration.
+All have occurrence names that are derived uniquely from their parent
+declaration.
None of these get separate definitions in an interface file; they are
fully defined by the data or class decl. But they may *occur* in
-- for a module. That's why (despite the misnomer) IfaceSig and ForeignType
-- are both in TyClDecl
-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
- }
+type LTyClDecl name = Located (TyClDecl name)
- | ForeignType { tcdName :: name, -- See remarks about IfaceSig above
- tcdExtName :: Maybe FastString,
- tcdFoType :: FoType,
- tcdLoc :: SrcLoc }
+data TyClDecl name
+ = ForeignType {
+ tcdLName :: Located name,
+ tcdExtName :: Maybe FastString,
+ tcdFoType :: FoType
+ }
| TyData { tcdND :: NewOrData,
- 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
+ tcdCtxt :: LHsContext name, -- Context
+ tcdLName :: Located name, -- Type constructor
+ tcdTyVars :: [LHsTyVarBndr name], -- Type variables
+ tcdCons :: [LConDecl name], -- Data constructors
+ tcdDerivs :: Maybe [LHsType name]
+ -- Derivings; Nothing => not specified
+ -- Just [] => derive exactly what is asked
+ -- These "types" must be of form
+ -- forall ab. C ty1 ty2
+ -- Typically the foralls and ty args are empty, but they
+ -- are non-empty for the newtype-deriving case
}
- | TySynonym { tcdName :: name, -- type constructor
- tcdTyVars :: [HsTyVarBndr name], -- type variables
- tcdSynRhs :: HsType name, -- synonym expansion
- tcdLoc :: SrcLoc
+ | TySynonym { tcdLName :: Located name, -- type constructor
+ tcdTyVars :: [LHsTyVarBndr name], -- type variables
+ tcdSynRhs :: LHsType name -- synonym expansion
}
- | ClassDecl { tcdCtxt :: HsContext name, -- Context...
- tcdName :: name, -- Name of the class
- tcdTyVars :: [HsTyVarBndr name], -- The class type variables
- tcdFDs :: [FunDep name], -- Functional dependencies
- tcdSigs :: [Sig name], -- Methods' signatures
- tcdMeths :: Maybe (MonoBinds name), -- Default methods
- -- Nothing for imported class decls
- -- Just bs for source class decls
- tcdLoc :: SrcLoc
+ | ClassDecl { tcdCtxt :: LHsContext name, -- Context...
+ tcdLName :: Located name, -- Name of the class
+ tcdTyVars :: [LHsTyVarBndr name], -- Class type variables
+ tcdFDs :: [Located (FunDep name)], -- Functional deps
+ tcdSigs :: [LSig name], -- Methods' signatures
+ tcdMeths :: LHsBinds name -- Default methods
}
+
+data NewOrData
+ = NewType -- "newtype Blah ..."
+ | DataType -- "data Blah ..."
+ deriving( Eq ) -- Needed because Demand derives Eq
\end{code}
Simple classifiers
\begin{code}
-isIfaceSigDecl, isDataDecl, isSynDecl, isClassDecl :: TyClDecl name -> Bool
-
-isIfaceSigDecl (IfaceSig {}) = True
-isIfaceSigDecl other = False
+isDataDecl, isSynDecl, isClassDecl :: TyClDecl name -> Bool
isSynDecl (TySynonym {}) = True
isSynDecl 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 -> name
-tyClDeclName tycl_decl = tcdName tycl_decl
+tcdName :: TyClDecl name -> name
+tcdName decl = unLoc (tcdLName decl)
---------------------------------
-tyClDeclNames :: Eq name => TyClDecl name -> [(name, SrcLoc)]
+tyClDeclNames :: Eq name => TyClDecl name -> [Located name]
-- 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
-- We use the equality to filter out duplicate field names
-tyClDeclNames (TySynonym {tcdName = name, tcdLoc = loc}) = [(name,loc)]
-tyClDeclNames (IfaceSig {tcdName = name, tcdLoc = loc}) = [(name,loc)]
-tyClDeclNames (ForeignType {tcdName = name, tcdLoc = loc}) = [(name,loc)]
-
-tyClDeclNames (ClassDecl {tcdName = cls_name, tcdSigs = sigs, tcdLoc = loc})
- = (cls_name,loc) : [(n,loc) | ClassOpSig n _ _ loc <- sigs]
+tyClDeclNames (TySynonym {tcdLName = name}) = [name]
+tyClDeclNames (ForeignType {tcdLName = name}) = [name]
-tyClDeclNames (TyData {tcdName = tc_name, tcdCons = cons, tcdLoc = loc})
- = (tc_name,loc) : conDeclsNames cons
+tyClDeclNames (ClassDecl {tcdLName = cls_name, tcdSigs = sigs})
+ = cls_name : [n | L _ (Sig n _) <- sigs]
+tyClDeclNames (TyData {tcdLName = tc_name, tcdCons = cons})
+ = tc_name : conDeclsNames (map unLoc cons)
tyClDeclTyVars (TySynonym {tcdTyVars = tvs}) = tvs
tyClDeclTyVars (TyData {tcdTyVars = tvs}) = tvs
tyClDeclTyVars (ClassDecl {tcdTyVars = tvs}) = tvs
tyClDeclTyVars (ForeignType {}) = []
-tyClDeclTyVars (IfaceSig {}) = []
-\end{code}
-
-\begin{code}
-instance (NamedThing name, Ord name) => Eq (TyClDecl name) where
- -- Used only when building interface files
- (==) d1@(IfaceSig {}) d2@(IfaceSig {})
- = tcdName d1 == tcdName d2 &&
- tcdType d1 == tcdType d2 &&
- tcdIdInfo d1 == tcdIdInfo d2
-
- (==) d1@(ForeignType {}) d2@(ForeignType {})
- = tcdName d1 == tcdName d2 &&
- tcdFoType d1 == tcdFoType d2
-
- (==) d1@(TyData {}) d2@(TyData {})
- = tcdName d1 == tcdName d2 &&
- tcdND d1 == tcdND d2 &&
- eqWithHsTyVars (tcdTyVars d1) (tcdTyVars d2) (\ env ->
- eq_hsContext env (tcdCtxt d1) (tcdCtxt d2) &&
- eq_hsCD env (tcdCons d1) (tcdCons d2)
- )
-
- (==) d1@(TySynonym {}) d2@(TySynonym {})
- = tcdName d1 == tcdName d2 &&
- eqWithHsTyVars (tcdTyVars d1) (tcdTyVars d2) (\ env ->
- eq_hsType env (tcdSynRhs d1) (tcdSynRhs d2)
- )
-
- (==) d1@(ClassDecl {}) d2@(ClassDecl {})
- = tcdName d1 == tcdName d2 &&
- eqWithHsTyVars (tcdTyVars d1) (tcdTyVars d2) (\ env ->
- eq_hsContext env (tcdCtxt d1) (tcdCtxt d2) &&
- eqListBy (eq_hsFD env) (tcdFDs d1) (tcdFDs d2) &&
- eqListBy (eq_cls_sig env) (tcdSigs d1) (tcdSigs d2)
- )
-
- (==) _ _ = 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
-
-eq_cls_sig env (ClassOpSig n1 dm1 ty1 _) (ClassOpSig n2 dm2 ty2 _)
- = n1==n2 && dm1 `eq_dm` dm2 && eq_hsType env ty1 ty2
- where
- -- Ignore the name of the default method for (DefMeth id)
- -- This is used for comparing declarations before putting
- -- them into interface files, and the name of the default
- -- method isn't relevant
- NoDefMeth `eq_dm` NoDefMeth = True
- GenDefMeth `eq_dm` GenDefMeth = True
- DefMeth _ `eq_dm` DefMeth _ = True
- dm1 `eq_dm` dm2 = False
\end{code}
\begin{code}
-countTyClDecls :: [TyClDecl name] -> (Int, Int, Int, Int, Int)
+countTyClDecls :: [TyClDecl name] -> (Int, Int, Int, Int)
-- class, data, newtype, synonym decls
countTyClDecls decls
= (count isClassDecl decls,
count isSynDecl decls,
- count isIfaceSigDecl decls,
count isDataTy decls,
count isNewTy decls)
where
instance OutputableBndr name
=> Outputable (TyClDecl name) where
- ppr (IfaceSig {tcdName = var, tcdType = ty, tcdIdInfo = info})
- = getPprStyle $ \ sty ->
- hsep [ pprHsVar var, dcolon, ppr ty, pprHsIdInfo info ]
+ ppr (ForeignType {tcdLName = ltycon})
+ = hsep [ptext SLIT("foreign import type dotnet"), ppr ltycon]
- ppr (ForeignType {tcdName = tycon})
- = hsep [ptext SLIT("foreign import type dotnet"), ppr tycon]
-
- ppr (TySynonym {tcdName = tycon, tcdTyVars = tyvars, tcdSynRhs = mono_ty})
- = hang (ptext SLIT("type") <+> pp_decl_head [] tycon tyvars <+> equals)
+ ppr (TySynonym {tcdLName = ltycon, tcdTyVars = tyvars, tcdSynRhs = mono_ty})
+ = hang (ptext SLIT("type") <+> pp_decl_head [] ltycon tyvars <+> equals)
4 (ppr mono_ty)
- ppr (TyData {tcdND = new_or_data, tcdCtxt = context, tcdName = tycon,
+ ppr (TyData {tcdND = new_or_data, tcdCtxt = context, tcdLName = ltycon,
tcdTyVars = tyvars, tcdCons = condecls,
tcdDerivs = derivings})
- = pp_tydecl (ptext keyword <+> pp_decl_head context tycon tyvars)
+ = pp_tydecl (ppr new_or_data <+> pp_decl_head (unLoc context) ltycon tyvars)
(pp_condecls condecls)
derivings
- where
- keyword = case new_or_data of
- NewType -> SLIT("newtype")
- DataType -> SLIT("data")
- ppr (ClassDecl {tcdCtxt = context, tcdName = clas, tcdTyVars = tyvars, tcdFDs = fds,
+ ppr (ClassDecl {tcdCtxt = context, tcdLName = lclas, tcdTyVars = tyvars, tcdFDs = fds,
tcdSigs = sigs, tcdMeths = methods})
| null sigs -- No "where" part
= top_matter
| otherwise -- Laid out
= sep [hsep [top_matter, ptext SLIT("where {")],
- nest 4 (sep [sep (map ppr_sig sigs), pp_methods, char '}'])]
+ nest 4 (sep [sep (map ppr_sig sigs), ppr methods, char '}'])]
where
- top_matter = ptext SLIT("class") <+> pp_decl_head context clas tyvars <+> pprFundeps fds
+ top_matter = ptext SLIT("class") <+> pp_decl_head (unLoc context) lclas tyvars <+> pprFundeps (map unLoc fds)
ppr_sig sig = ppr sig <> semi
- pp_methods = if isNothing methods
- then empty
- else ppr (fromJust methods)
+pp_decl_head :: OutputableBndr name
+ => HsContext name
+ -> Located name
+ -> [LHsTyVarBndr name]
+ -> SDoc
+pp_decl_head context thing tyvars
+ = hsep [pprHsContext context, ppr thing, interppSP tyvars]
-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 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_condecls 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"), ppr_hs_context ds]
+ Just ds -> hsep [ptext SLIT("deriving"), parens (interpp'SP ds)]
])
+
+instance Outputable NewOrData where
+ ppr NewType = ptext SLIT("newtype")
+ ppr DataType = ptext SLIT("data")
\end{code}
%************************************************************************
\begin{code}
+type LConDecl name = Located (ConDecl name)
+
data ConDecl name
- = ConDecl name -- Constructor name; this is used for the
+ = ConDecl (Located name) -- Constructor name; this is used for the
-- DataCon itself, and for the user-callable wrapper Id
- [HsTyVarBndr name] -- Existentially quantified type variables
- (HsContext name) -- ...and context
+ [LHsTyVarBndr name] -- Existentially quantified type variables
+ (LHsContext name) -- ...and context
-- If both are empty then there are no existentials
- (HsConDetails name (BangType name))
- SrcLoc
+ (HsConDetails name (LBangType name))
\end{code}
\begin{code}
-conDeclsNames :: Eq name => DataConDetails (ConDecl name) -> [(name,SrcLoc)]
+conDeclsNames :: Eq name => [ConDecl name] -> [Located name]
-- 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 ([], []) (visibleDataCons cons))
+ = snd (foldl do_one ([], []) cons)
where
- do_one (flds_seen, acc) (ConDecl name _ _ (RecCon flds) loc)
- = (new_flds ++ flds_seen, (name,loc) : [(f,loc) | f <- new_flds] ++ acc)
+ do_one (flds_seen, acc) (ConDecl lname _ _ (RecCon flds))
+ = (map unLoc new_flds ++ flds_seen, lname : [f | f <- new_flds] ++ acc)
where
- new_flds = [ f | (f,_) <- flds, not (f `elem` flds_seen) ]
+ new_flds = [ f | (f,_) <- flds, not (unLoc f `elem` flds_seen) ]
- do_one (flds_seen, acc) (ConDecl name _ _ _ loc)
- = (flds_seen, (name,loc):acc)
-\end{code}
+ do_one (flds_seen, acc) (ConDecl lname _ _ _)
+ = (flds_seen, lname:acc)
-\begin{code}
conDetailsTys details = map getBangType (hsConArgs details)
-
-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 (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
-eq_ConDetails env (RecCon fs1) (RecCon fs2)
- = eqListBy (eq_fld env) fs1 fs2
-eq_ConDetails env _ _ = False
-
-eq_fld env (ns1,bt1) (ns2, bt2) = ns1==ns2 && eq_btype env bt1 bt2
\end{code}
\begin{code}
-data BangType name = BangType StrictnessMark (HsType name)
+type LBangType name = Located (BangType name)
+
+data BangType name = BangType HsBang (LHsType name)
+
+data HsBang = HsNoBang
+ | HsStrict -- !
+ | HsUnbox -- {-# UNPACK #-} ! (GHC extension, meaning "unbox")
getBangType (BangType _ ty) = ty
getBangStrictness (BangType s _) = s
-unbangedType ty = BangType NotMarkedStrict ty
-
-eq_btype env (BangType s1 t1) (BangType s2 t2) = s1==s2 && eq_hsType env t1 t2
+unbangedType :: LHsType id -> LBangType id
+unbangedType ty@(L loc _) = L loc (BangType HsNoBang ty)
\end{code}
\begin{code}
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 (ConDecl con tvs cxt con_details)
+ = sep [pprHsForAll Explicit tvs cxt, ppr_con_details con con_details]
ppr_con_details con (InfixCon ty1 ty2)
- = hsep [ppr_bang ty1, ppr con, ppr_bang ty2]
+ = hsep [ppr ty1, ppr con, ppr ty2]
-- 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 (PrefixCon tys)
- = hsep (pprHsVar con : map ppr_bang tys)
+ = hsep (pprHsVar con : map ppr tys)
ppr_con_details con (RecCon fields)
= ppr con <+> braces (sep (punctuate comma (map ppr_field fields)))
where
- ppr_field (n, ty) = ppr n <+> dcolon <+> ppr_bang ty
+ ppr_field (n, ty) = ppr n <+> dcolon <+> ppr ty
instance OutputableBndr name => Outputable (BangType name) where
- ppr = ppr_bang
-
-ppr_bang (BangType s ty) = ppr s <> pprParendHsType ty
+ ppr (BangType is_strict ty)
+ = bang <> pprParendHsType (unLoc ty)
+ where
+ bang = case is_strict of
+ HsNoBang -> empty
+ HsStrict -> char '!'
+ HsUnbox -> ptext SLIT("!!")
\end{code}
%************************************************************************
\begin{code}
+type LInstDecl name = Located (InstDecl name)
+
data InstDecl name
- = InstDecl (HsType name) -- Context => Class Instance-type
+ = InstDecl (LHsType name) -- Context => Class Instance-type
-- Using a polytype means that the renamer conveniently
-- figures out the quantified type variables for us.
+ (LHsBinds name)
+ [LSig name] -- User-supplied pragmatic info
- (MonoBinds name)
-
- [Sig name] -- User-supplied pragmatic info
-
- (Maybe name) -- Name for the dictionary function
- -- Nothing for source-file instance decls
-
- SrcLoc
-
-isSourceInstDecl :: InstDecl name -> Bool
-isSourceInstDecl (InstDecl _ _ _ maybe_dfun _) = isNothing maybe_dfun
-
-instDeclDFun :: InstDecl name -> Maybe name
-instDeclDFun (InstDecl _ _ _ df _) = df -- A Maybe, but that's ok
-\end{code}
-
-\begin{code}
instance (OutputableBndr name) => Outputable (InstDecl name) where
- ppr (InstDecl inst_ty binds uprags maybe_dfun_name src_loc)
+ ppr (InstDecl inst_ty binds uprags)
= 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
- Nothing -> empty
-\end{code}
-
-\begin{code}
-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
+ nest 4 (pprLHsBinds binds) ]
\end{code}
-
%************************************************************************
%* *
\subsection[DefaultDecl]{A @default@ declaration}
syntax, and that restriction must be checked in the front end.
\begin{code}
+type LDefaultDecl name = Located (DefaultDecl name)
+
data DefaultDecl name
- = DefaultDecl [HsType name]
- SrcLoc
+ = DefaultDecl [LHsType name]
instance (OutputableBndr name)
=> Outputable (DefaultDecl name) where
- ppr (DefaultDecl tys src_loc)
+ ppr (DefaultDecl tys)
= ptext SLIT("default") <+> parens (interpp'SP tys)
\end{code}
-- * the Boolean value indicates whether the pre-standard deprecated syntax
-- has been used
--
-data ForeignDecl name
- = ForeignImport name (HsType name) ForeignImport Bool SrcLoc -- defines name
- | ForeignExport name (HsType name) ForeignExport Bool SrcLoc -- uses name
+type LForeignDecl name = Located (ForeignDecl name)
--- yield the Haskell name defined or used in a foreign declaration
---
-foreignDeclName :: ForeignDecl name -> name
-foreignDeclName (ForeignImport n _ _ _ _) = n
-foreignDeclName (ForeignExport n _ _ _ _) = n
+data ForeignDecl name
+ = ForeignImport (Located name) (LHsType name) ForeignImport Bool -- defines name
+ | ForeignExport (Located name) (LHsType name) ForeignExport Bool -- uses name
-- specification of an imported external entity in dependence on the calling
-- convention
--
instance OutputableBndr name => Outputable (ForeignDecl name) where
- ppr (ForeignImport n ty fimport _ _) =
+ ppr (ForeignImport n ty fimport _) =
ptext SLIT("foreign import") <+> ppr fimport <+>
ppr n <+> dcolon <+> ppr ty
- ppr (ForeignExport n ty fexport _ _) =
+ ppr (ForeignExport n ty fexport _) =
ptext SLIT("foreign export") <+> ppr fexport <+>
ppr n <+> dcolon <+> ppr ty
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
%************************************************************************
\begin{code}
+type LRuleDecl name = Located (RuleDecl name)
+
data RuleDecl name
= HsRule -- Source rule
RuleName -- Rule name
Activation
[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
- RuleName
- Activation
- [UfBinder name] -- Tyvars and term vars
- name -- Head of lhs
- [UfExpr name] -- Args of LHS
- (UfExpr name) -- Pre typecheck
- SrcLoc
-
- | IfaceRuleOut -- Post typecheck
- name -- Head of LHS
- CoreRule
-
-isSrcRule :: RuleDecl name -> Bool
-isSrcRule (HsRule _ _ _ _ _ _) = True
-isSrcRule other = False
-
-ifaceRuleDeclName :: RuleDecl name -> name
-ifaceRuleDeclName (IfaceRule _ _ _ n _ _ _) = n
-ifaceRuleDeclName (IfaceRuleOut n r) = n
-ifaceRuleDeclName (HsRule fs _ _ _ _ _) = pprPanic "ifaceRuleDeclName" (ppr fs)
+ (Located (HsExpr name)) -- LHS
+ (Located (HsExpr name)) -- RHS
data RuleBndr name
- = RuleBndr name
- | RuleBndrSig name (HsType name)
+ = RuleBndr (Located name)
+ | RuleBndrSig (Located name) (LHsType name)
-collectRuleBndrSigTys :: [RuleBndr name] -> [HsType name]
+collectRuleBndrSigTys :: [RuleBndr name] -> [LHsType 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 OutputableBndr name => Outputable (RuleDecl name) where
- ppr (HsRule name act ns lhs rhs loc)
+ ppr (HsRule name act ns lhs rhs)
= sep [text "{-# RULES" <+> doubleQuotes (ftext name) <+> ppr act,
- pp_forall, pprExpr lhs, equals <+> pprExpr rhs,
- text "#-}" ]
+ nest 4 (pp_forall <+> pprExpr (unLoc lhs)),
+ nest 4 (equals <+> pprExpr (unLoc rhs) <+> text "#-}") ]
where
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 (ftext name), ppr act,
- ptext SLIT("__forall") <+> braces (interppSP tpl_vars),
- ppr fn <+> sep (map (pprUfExpr parens) tpl_args),
- ptext SLIT("=") <+> ppr rhs
- ] <+> semi
-
- ppr (IfaceRuleOut fn rule) = pprCoreRule (ppr fn) rule
-
instance OutputableBndr name => Outputable (RuleBndr name) where
ppr (RuleBndr name) = ppr name
ppr (RuleBndrSig name ty) = ppr name <> dcolon <> ppr ty
We use exported entities for things to deprecate.
\begin{code}
-data DeprecDecl name = Deprecation name DeprecTxt SrcLoc
+type LDeprecDecl name = Located (DeprecDecl name)
-type DeprecTxt = FastString -- reason/explanation for deprecation
+data DeprecDecl name = Deprecation name DeprecTxt
instance OutputableBndr name => Outputable (DeprecDecl name) where
- ppr (Deprecation thing txt _)
+ 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