Add TcRnMonad.newSysLocalIds, and use it

[ghc-hetmet.git] / compiler / typecheck / TcRnDriver.lhs

diff --git a/compiler/typecheck/TcRnDriver.lhs b/compiler/typecheck/TcRnDriver.lhs
index 0a4895f..875d4f6 100644 (file)
--- a/compiler/typecheck/TcRnDriver.lhs
+++ b/compiler/typecheck/TcRnDriver.lhs
@@ -35,6 +35,7 @@ import RdrHsSyn               ( findSplice )
 import PrelNames       ( runMainIOName, rootMainKey, rOOT_MAIN, mAIN,
                          main_RDR_Unqual )
 import RdrName         ( RdrName, mkRdrUnqual, emptyGlobalRdrEnv )
+import TyCon           ( isOpenTyCon )
 import TcHsSyn         ( zonkTopDecls )
 import TcExpr          ( tcInferRho )
 import TcRnMonad
@@ -88,7 +89,7 @@ import HsSyn          ( HsStmtContext(..), Stmt(..), HsExpr(..),
                          HsLocalBinds(..), HsValBinds(..),
                          LStmt, LHsExpr, LHsType, mkMatch, emptyLocalBinds,
                          collectLStmtsBinders, collectLStmtBinders, nlVarPat,
-                         mkFunBind, placeHolderType, noSyntaxExpr )
+                         mkFunBind, placeHolderType, noSyntaxExpr, nlHsTyApp )
 import RdrName         ( GlobalRdrElt(..), globalRdrEnvElts,
                          unQualOK, lookupLocalRdrEnv, extendLocalRdrEnv )
 import RnSource                ( addTcgDUs )
@@ -97,6 +98,7 @@ import TcHsType               ( kcHsType )
 import TcMType         ( zonkTcType, zonkQuantifiedTyVar )
 import TcMatches       ( tcStmts, tcDoStmt )
 import TcSimplify      ( tcSimplifyInteractive, tcSimplifyInfer )
+import TcGadt          ( emptyRefinement )
 import TcType          ( Type, mkForAllTys, mkFunTys, mkTyConApp, tyVarsOfType, isTauTy,
                          isUnLiftedType, tyClsNamesOfDFunHead, tyClsNamesOfType, isUnitTy )
 import TcEnv           ( tcLookupTyCon, tcLookupId, tcLookupGlobal )
@@ -113,7 +115,7 @@ import MkId         ( unsafeCoerceId )
 import TyCon           ( tyConName )
 import TysWiredIn      ( mkListTy, unitTy )
 import IdInfo          ( GlobalIdDetails(..) )
-import {- Kind parts of -} Type                ( Kind, eqKind )
+import {- Kind parts of -} Type                ( Kind )
 import Var             ( globaliseId )
 import Name            ( isBuiltInSyntax, isInternalName )
 import OccName         ( isTcOcc )
@@ -230,9 +232,10 @@ tcRnModule hsc_env hsc_src save_rn_syntax
        reportDeprecations (hsc_dflags hsc_env) tcg_env ;
 
                -- Process the export list
-       rn_exports <- rnExports export_ies ;
+       rn_exports <- rnExports export_ies;
         let { liftM2' fn a b = do a' <- a; b' <- b; return (fn a' b') } ;
-        exports <- mkExportNameSet (isJust maybe_mod) (liftM2' (,) rn_exports export_ies) ;
+        exports <- mkExportNameSet (isJust maybe_mod) 
+                                  (liftM2' (,) rn_exports export_ies) ;
 
                -- Check whether the entire module is deprecated
                -- This happens only once per module
@@ -560,6 +563,7 @@ missingBootThing thing
   = ppr thing <+> ptext SLIT("is defined in the hs-boot file, but not in the module")
 bootMisMatch thing boot_decl real_decl
   = ppr thing <+> ptext SLIT("has conflicting definitions in the module and its hs-boot file")
+    $+$ (ppr boot_decl) $+$ (ppr real_decl)
 instMisMatch inst
   = hang (ppr inst)
        2 (ptext SLIT("is defined in the hs-boot file, but not in the module"))
@@ -983,6 +987,8 @@ tcGhciStmts stmts
            io_ty     = mkTyConApp ioTyCon [] ;
            ret_ty    = mkListTy unitTy ;
            io_ret_ty = mkTyConApp ioTyCon [ret_ty] ;
+           tc_io_stmts stmts = tcStmts DoExpr (tcDoStmt io_ty) stmts 
+                                       (emptyRefinement, io_ret_ty) ;
 
            names = map unLoc (collectLStmtsBinders stmts) ;
 
@@ -997,19 +1003,16 @@ tcGhciStmts stmts
                -- then the type checker would instantiate x..z, and we wouldn't
                -- get their *polymorphic* values.  (And we'd get ambiguity errs
                -- if they were overloaded, since they aren't applied to anything.)
-           mk_return ids = nlHsApp (mkHsTyApp ret_id [ret_ty]) 
+           mk_return ids = nlHsApp (nlHsTyApp ret_id [ret_ty]) 
                                    (noLoc $ ExplicitList unitTy (map mk_item ids)) ;
-           mk_item id = nlHsApp (noLoc $ unsafeCoerce)
-                                (nlHsVar id)
- 
-            unsafeCoerce x = Cast x (mkUnsafeCoercion [idType id, unitTy]) 
+           mk_item id = nlHsApp (nlHsTyApp unsafeCoerceId [idType id, unitTy])
+                                (nlHsVar id) 
         } ;
 
        -- OK, we're ready to typecheck the stmts
        traceTc (text "tcs 2") ;
-       ((tc_stmts, ids), lie) <- getLIE $ 
-                                 tcStmts DoExpr (tcDoStmt io_ty) stmts io_ret_ty $ \ _ ->
-                                 mappM tcLookupId names ;
+       ((tc_stmts, ids), lie) <- getLIE $ tc_io_stmts stmts $ \ _ ->
+                                          mappM tcLookupId names ;
                                        -- Look up the names right in the middle,
                                        -- where they will all be in scope