\section[RnHsSyn]{Specialisations of the @HsSyn@ syntax for the renamer}
\begin{code}
-module RnHsSyn(
- -- Names
- charTyCon_name, listTyCon_name, parrTyCon_name, tupleTyCon_name,
- extractHsTyVars, extractHsTyNames, extractHsTyNames_s,
- extractFunDepNames, extractHsCtxtTyNames, extractHsPredTyNames,
-
- -- Free variables
- hsSigsFVs, hsSigFVs, conDeclFVs, bangTyFVs,
-
- maybeGenericMatch
+module RnHsSyn(
+ -- Names
+ charTyCon_name, listTyCon_name, parrTyCon_name, tupleTyCon_name,
+ extractHsTyVars, extractHsTyNames, extractHsTyNames_s,
+ extractFunDepNames, extractHsCtxtTyNames, extractHsPredTyNames,
+
+ -- Free variables
+ hsSigsFVs, hsSigFVs, conDeclFVs, bangTyFVs
) where
#include "HsVersions.h"
import HsSyn
-import Class ( FunDep )
-import TysWiredIn ( tupleTyCon, listTyCon, parrTyCon, charTyCon )
-import Name ( Name, getName, isTyVarName )
+import Class ( FunDep )
+import TysWiredIn ( tupleTyCon, listTyCon, parrTyCon, hetMetCodeTypeTyCon, charTyCon )
+import Name ( Name, getName, isTyVarName )
import NameSet
-import BasicTypes ( Boxity )
-import SrcLoc ( Located(..), unLoc )
+import BasicTypes ( Boxity )
+import SrcLoc ( Located(..), unLoc )
\end{code}
%************************************************************************
-%* *
+%* *
\subsection{Free variables}
-%* *
+%* *
%************************************************************************
These free-variable finders returns tycons and classes too.
charTyCon_name = getName charTyCon
listTyCon_name = getName listTyCon
parrTyCon_name = getName parrTyCon
+hetMetCodeTypeTyCon_name :: Name
+hetMetCodeTypeTyCon_name = getName hetMetCodeTypeTyCon
tupleTyCon_name :: Boxity -> Int -> Name
tupleTyCon_name boxity n = getName (tupleTyCon boxity n)
get (HsAppTy ty1 ty2) = getl ty1 `unionNameSets` getl ty2
get (HsListTy ty) = unitNameSet listTyCon_name `unionNameSets` getl ty
get (HsPArrTy ty) = unitNameSet parrTyCon_name `unionNameSets` getl ty
- get (HsTupleTy con tys) = extractHsTyNames_s tys
+ get (HsModalBoxType ecn ty) = (unitNameSet ecn) `unionNameSets` (unitNameSet hetMetCodeTypeTyCon_name) `unionNameSets` (getl ty)
+ get (HsTupleTy _ tys) = extractHsTyNames_s tys
get (HsFunTy ty1 ty2) = getl ty1 `unionNameSets` getl ty2
- get (HsPredTy p) = extractHsPredTyNames p
+ get (HsPredTy p) = extractHsPredTyNames p
get (HsOpTy ty1 op ty2) = getl ty1 `unionNameSets` getl ty2 `unionNameSets` unitNameSet (unLoc op)
get (HsParTy ty) = getl ty
get (HsBangTy _ ty) = getl ty
- get (HsNumTy n) = emptyNameSet
- get (HsTyVar tv) = unitNameSet tv
- get (HsSpliceTy _) = emptyNameSet -- Type splices mention no type variables
- get (HsKindSig ty k) = getl ty
- get (HsForAllTy _ tvs
- ctxt ty) = (extractHsCtxtTyNames ctxt
- `unionNameSets` getl ty)
- `minusNameSet`
- mkNameSet (hsLTyVarNames tvs)
+ get (HsRecTy flds) = extractHsTyNames_s (map cd_fld_type flds)
+ get (HsTyVar tv) = unitNameSet tv
+ get (HsSpliceTy _ fvs _) = fvs
+ get (HsQuasiQuoteTy {}) = emptyNameSet
+ get (HsKindSig ty _) = getl ty
+ get (HsForAllTy _ tvs
+ ctxt ty) = (extractHsCtxtTyNames ctxt
+ `unionNameSets` getl ty)
+ `minusNameSet`
+ mkNameSet (hsLTyVarNames tvs)
get (HsDocTy ty _) = getl ty
+ get (HsCoreTy {}) = emptyNameSet -- This probably isn't quite right
+ -- but I don't think it matters
extractHsTyNames_s :: [LHsType Name] -> NameSet
extractHsTyNames_s tys = foldr (unionNameSets . extractHsTyNames) emptyNameSet tys
-- You don't import or export implicit parameters,
-- so don't mention the IP names
+extractHsPredTyNames :: HsPred Name -> NameSet
extractHsPredTyNames (HsClassP cls tys)
= unitNameSet cls `unionNameSets` extractHsTyNames_s tys
-extractHsPredTyNames (HsIParam n ty)
+extractHsPredTyNames (HsEqualP ty1 ty2)
+ = extractHsTyNames ty1 `unionNameSets` extractHsTyNames ty2
+extractHsPredTyNames (HsIParam _ ty)
= extractHsTyNames ty
\end{code}
%************************************************************************
-%* *
+%* *
\subsection{Free variables of declarations}
-%* *
+%* *
%************************************************************************
Return the Names that must be in scope if we are to use this declaration.
In all cases this is set up for interface-file declarations:
- - for class decls we ignore the bindings
- - for instance decls likewise, plus the pragmas
- - for rule decls, we ignore HsRules
+ - for class decls we ignore the bindings
+ - for instance decls likewise, plus the pragmas
+ - for rule decls, we ignore HsRules
- for data decls, we ignore derivings
- *** See "THE NAMING STORY" in HsDecls ****
+ *** See "THE NAMING STORY" in HsDecls ****
\begin{code}
----------------
hsSigsFVs :: [LSig Name] -> FreeVars
hsSigsFVs sigs = plusFVs (map (hsSigFVs.unLoc) sigs)
-hsSigFVs (TypeSig v ty) = extractHsTyNames ty
-hsSigFVs (SpecInstSig ty) = extractHsTyNames ty
-hsSigFVs (SpecSig v ty inl) = extractHsTyNames ty
-hsSigFVs other = emptyFVs
+hsSigFVs :: Sig Name -> FreeVars
+hsSigFVs (TypeSig _ ty) = extractHsTyNames ty
+hsSigFVs (GenericSig _ ty) = extractHsTyNames ty
+hsSigFVs (SpecInstSig ty) = extractHsTyNames ty
+hsSigFVs (SpecSig _ ty _) = extractHsTyNames ty
+hsSigFVs _ = emptyFVs
----------------
-conDeclFVs (L _ (ConDecl { con_qvars = tyvars, con_cxt = context,
- con_details = details, con_res = res_ty}))
+conDeclFVs :: LConDecl Name -> FreeVars
+conDeclFVs (L _ (ConDecl { con_qvars = tyvars, con_cxt = context,
+ con_details = details, con_res = res_ty}))
= delFVs (map hsLTyVarName tyvars) $
extractHsCtxtTyNames context `plusFV`
- conDetailsFVs details `plusFV`
+ conDetailsFVs details `plusFV`
conResTyFVs res_ty
+conResTyFVs :: ResType Name -> FreeVars
conResTyFVs ResTyH98 = emptyFVs
conResTyFVs (ResTyGADT ty) = extractHsTyNames ty
-conDetailsFVs (PrefixCon btys) = plusFVs (map bangTyFVs btys)
-conDetailsFVs (InfixCon bty1 bty2) = bangTyFVs bty1 `plusFV` bangTyFVs bty2
-conDetailsFVs (RecCon flds) = plusFVs [bangTyFVs bty | (HsRecField _ bty _) <- flds]
+conDetailsFVs :: HsConDeclDetails Name -> FreeVars
+conDetailsFVs details = plusFVs (map bangTyFVs (hsConDeclArgTys details))
+bangTyFVs :: LHsType Name -> FreeVars
bangTyFVs bty = extractHsTyNames (getBangType bty)
\end{code}
-
-
-%************************************************************************
-%* *
-\subsection{A few functions on generic defintions
-%* *
-%************************************************************************
-
-These functions on generics are defined over Matches Name, which is
-why they are here and not in HsMatches.
-
-\begin{code}
-maybeGenericMatch :: LMatch Name -> Maybe (HsType Name, LMatch Name)
- -- Tells whether a Match is for a generic definition
- -- and extract the type from a generic match and put it at the front
-
-maybeGenericMatch (L loc (Match (L _ (TypePat (L _ ty)) : pats) sig_ty grhss))
- = Just (ty, L loc (Match pats sig_ty grhss))
-
-maybeGenericMatch other_match = Nothing
-\end{code}
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