Fix scoped type variables for expression type signatures

[ghc-hetmet.git] / compiler / deSugar / DsForeign.lhs

diff --git a/compiler/deSugar/DsForeign.lhs b/compiler/deSugar/DsForeign.lhs
index e5cbbfb..462da0e 100644 (file)
--- a/compiler/deSugar/DsForeign.lhs
+++ b/compiler/deSugar/DsForeign.lhs
@@ -28,9 +28,10 @@ import SMRep         ( argMachRep, typeCgRep )
 import CoreUtils       ( exprType, mkInlineMe )
 import Id              ( Id, idType, idName, mkSysLocal, setInlinePragma )
 import Literal         ( Literal(..), mkStringLit )
-import Module          ( moduleFS )
+import Module          ( moduleNameFS, moduleName )
 import Name            ( getOccString, NamedThing(..) )
 import Type            ( repType, coreEqType )
+import Coercion         ( mkUnsafeCoercion )
 import TcType          ( Type, mkFunTys, mkForAllTys, mkTyConApp,
                          mkFunTy, tcSplitTyConApp_maybe, tcSplitIOType_maybe,
                          tcSplitForAllTys, tcSplitFunTys, tcTyConAppArgs,
@@ -83,10 +84,9 @@ dsForeigns fos
   combine stubs (L loc decl) = putSrcSpanDs loc (combine1 stubs decl)
 
   combine1 (ForeignStubs acc_h acc_c acc_hdrs acc_feb, acc_f) 
-          (ForeignImport id _ spec depr)
+          (ForeignImport id _ spec)
     = traceIf (text "fi start" <+> ppr id)     `thenDs` \ _ ->
       dsFImport (unLoc id) spec                        `thenDs` \ (bs, h, c, mbhd) -> 
-      warnDepr depr                            `thenDs` \ _                ->
       traceIf (text "fi end" <+> ppr id)       `thenDs` \ _ ->
       returnDs (ForeignStubs (h $$ acc_h)
                             (c $$ acc_c)
@@ -95,10 +95,9 @@ dsForeigns fos
                bs ++ acc_f)
 
   combine1 (ForeignStubs acc_h acc_c acc_hdrs acc_feb, acc_f) 
-          (ForeignExport (L _ id) _ (CExport (CExportStatic ext_nm cconv)) depr)
+          (ForeignExport (L _ id) _ (CExport (CExportStatic ext_nm cconv)))
     = dsFExport id (idType id) 
                ext_nm cconv False                 `thenDs` \(h, c, _, _) ->
-      warnDepr depr                               `thenDs` \_              ->
       returnDs (ForeignStubs (h $$ acc_h) (c $$ acc_c) acc_hdrs (id:acc_feb), 
                acc_f)
 
@@ -106,11 +105,6 @@ dsForeigns fos
   addH (Just e) ls
    | e `elem` ls = ls
    | otherwise   = e:ls
-
-  warnDepr False = returnDs ()
-  warnDepr True  = dsWarn msg
-     where
-       msg = ptext SLIT("foreign declaration uses deprecated non-standard syntax")
 \end{code}
 
 
@@ -331,7 +325,7 @@ f :: Fun -> IO (FunPtr Fun)
 f cback =
    bindIO (newStablePtr cback)
           (\StablePtr sp# -> IO (\s1# ->
-              case _ccall_ createAdjustor cconv sp# ``f_helper'' s1# of
+              case _ccall_ createAdjustor cconv sp# ``f_helper'' <arg info> s1# of
                  (# s2#, a# #) -> (# s2#, A# a# #)))
 
 foreign import "&f_helper" f_helper :: FunPtr (StablePtr Fun -> Fun)
@@ -351,10 +345,10 @@ dsFExportDynamic :: Id
                 -> DsM ([Binding], SDoc, SDoc)
 dsFExportDynamic id cconv
   =  newSysLocalDs ty                           `thenDs` \ fe_id ->
-     getModuleDs                               `thenDs` \ mod_name -> 
+     getModuleDs                               `thenDs` \ mod -> 
      let 
         -- hack: need to get at the name of the C stub we're about to generate.
-       fe_nm      = mkFastString (unpackFS (zEncodeFS (moduleFS mod_name)) ++ "_" ++ toCName fe_id)
+       fe_nm      = mkFastString (unpackFS (zEncodeFS (moduleNameFS (moduleName mod))) ++ "_" ++ toCName fe_id)
      in
      newSysLocalDs arg_ty                      `thenDs` \ cback ->
      dsLookupGlobalId newStablePtrName         `thenDs` \ newStablePtrId ->
@@ -409,8 +403,9 @@ dsFExportDynamic id cconv
        -- PlayRisky: the adjustor doesn't allocate in the Haskell heap or do a callback
      let ccall_adj_ty = exprType ccall_adj
          ccall_io_adj = mkLams [stbl_value]                 $
-                       Note (Coerce io_res_ty ccall_adj_ty)
-                            ccall_adj
+                       (pprTrace "DsForeign: why is there an unsafeCoerce here?" (text "") $
+                       (Cast ccall_adj (mkUnsafeCoercion ccall_adj_ty io_res_ty )))
+
          io_app = mkLams tvs    $
                  mkLams [cback] $
                  stbl_app ccall_io_adj res_ty