+rnSourceDecl :: RdrNameHsDecl -> RnMS (RenamedHsDecl, FreeVars)
+
+rnSourceDecl (ValD binds) = rnTopBinds binds `thenRn` \ (new_binds, fvs) ->
+ returnRn (ValD new_binds, fvs)
+
+rnSourceDecl (TyClD tycl_decl)
+ = rnTyClDecl tycl_decl `thenRn` \ new_decl ->
+ finishSourceTyClDecl tycl_decl new_decl `thenRn` \ (new_decl', fvs) ->
+ returnRn (TyClD new_decl', fvs `plusFV` tyClDeclFVs new_decl')
+
+rnSourceDecl (InstD inst)
+ = rnInstDecl inst `thenRn` \ new_inst ->
+ finishSourceInstDecl inst new_inst `thenRn` \ (new_inst', fvs) ->
+ returnRn (InstD new_inst', fvs `plusFV` instDeclFVs new_inst')
+
+rnSourceDecl (RuleD rule)
+ = rnHsRuleDecl rule `thenRn` \ (new_rule, fvs) ->
+ returnRn (RuleD new_rule, fvs)
+
+rnSourceDecl (DefD (DefaultDecl tys src_loc))
+ = pushSrcLocRn src_loc $
+ mapFvRn (rnHsTypeFVs doc_str) tys `thenRn` \ (tys', fvs) ->
+ returnRn (DefD (DefaultDecl tys' src_loc), fvs)
+ where
+ doc_str = text "a `default' declaration"
+
+rnSourceDecl (ForD (ForeignDecl name imp_exp ty ext_nm cconv src_loc))
+ = pushSrcLocRn src_loc $
+ lookupOccRn name `thenRn` \ name' ->
+ let
+ extra_fvs FoExport
+ | isDyn = lookupOrigNames [newStablePtr_RDR, deRefStablePtr_RDR,
+ bindIO_RDR, returnIO_RDR]
+ | otherwise =
+ lookupOrigNames [bindIO_RDR, returnIO_RDR] `thenRn` \ fvs ->
+ returnRn (addOneFV fvs name')
+ extra_fvs other = returnRn emptyFVs
+ in
+ checkRn (ok_ext_nm ext_nm) (badExtName ext_nm) `thenRn_`
+
+ extra_fvs imp_exp `thenRn` \ fvs1 ->
+
+ rnHsTypeFVs fo_decl_msg ty `thenRn` \ (ty', fvs2) ->
+ returnRn (ForD (ForeignDecl name' imp_exp ty' ext_nm cconv src_loc),
+ fvs1 `plusFV` fvs2)
+ where
+ fo_decl_msg = ptext SLIT("The foreign declaration for") <+> ppr name
+ isDyn = isDynamicExtName ext_nm
+
+ ok_ext_nm Dynamic = True
+ ok_ext_nm (ExtName nm (Just mb)) = isCLabelString nm && isCLabelString mb
+ ok_ext_nm (ExtName nm Nothing) = isCLabelString nm
+\end{code}
+
+
+%*********************************************************
+%* *
+\subsection{Instance declarations}
+%* *
+%*********************************************************
+
+\begin{code}
+rnInstDecl (InstDecl inst_ty mbinds uprags maybe_dfun_rdr_name src_loc)
+ -- Used for both source and interface file decls
+ = pushSrcLocRn src_loc $
+ rnHsSigType (text "an instance decl") inst_ty `thenRn` \ inst_ty' ->
+
+ (case maybe_dfun_rdr_name of
+ Nothing -> returnRn Nothing
+ Just dfun_rdr_name -> lookupIfaceName dfun_rdr_name `thenRn` \ dfun_name ->
+ returnRn (Just dfun_name)
+ ) `thenRn` \ maybe_dfun_name ->
+
+ -- The typechecker checks that all the bindings are for the right class.
+ returnRn (InstDecl inst_ty' EmptyMonoBinds [] maybe_dfun_name src_loc)
+
+-- Compare finishSourceTyClDecl
+finishSourceInstDecl (InstDecl _ mbinds uprags _ _ )
+ (InstDecl inst_ty _ _ maybe_dfun_name src_loc)
+ -- Used for both source decls only
+ = ASSERT( not (maybeToBool maybe_dfun_name) ) -- Source decl!
+ let
+ meth_doc = text "the bindings in an instance declaration"
+ meth_names = collectLocatedMonoBinders mbinds
+ inst_tyvars = case inst_ty of
+ HsForAllTy (Just inst_tyvars) _ _ -> inst_tyvars
+ other -> []
+ -- (Slightly strangely) the forall-d tyvars scope over
+ -- the method bindings too
+ in
+
+ -- Rename the bindings
+ -- NB meth_names can be qualified!
+ checkDupNames meth_doc meth_names `thenRn_`
+ extendTyVarEnvFVRn (map hsTyVarName inst_tyvars) (
+ rnMethodBinds [] mbinds
+ ) `thenRn` \ (mbinds', meth_fvs) ->
+ let
+ binders = collectMonoBinders mbinds'
+ binder_set = mkNameSet binders
+ in
+ -- Rename the prags and signatures.
+ -- Note that the type variables are not in scope here,
+ -- so that instance Eq a => Eq (T a) where
+ -- {-# SPECIALISE instance Eq a => Eq (T [a]) #-}
+ -- works OK.
+ --
+ -- But the (unqualified) method names are in scope
+ bindLocalNames binders (
+ renameSigsFVs (okInstDclSig binder_set) uprags
+ ) `thenRn` \ (uprags', prag_fvs) ->
+
+ returnRn (InstDecl inst_ty mbinds' uprags' maybe_dfun_name src_loc,
+ meth_fvs `plusFV` prag_fvs)
+\end{code}
projects / ghc-hetmet.git / blobdiff