Another tiny tidy-up to RnPat

[ghc-hetmet.git] / compiler / rename / RnSource.lhs

diff --git a/compiler/rename/RnSource.lhs b/compiler/rename/RnSource.lhs
index e2adb33..bbf4938 100644 (file)
--- a/compiler/rename/RnSource.lhs
+++ b/compiler/rename/RnSource.lhs
@@ -21,11 +21,10 @@ import RnBinds              ( rnTopBindsLHS, rnTopBindsRHS, rnMethodBinds, renameSigs, mkSig
                                 makeMiniFixityEnv)
 import RnEnv           ( lookupLocalDataTcNames, lookupLocatedOccRn,
                          lookupTopBndrRn, lookupLocatedTopBndrRn,
-                         lookupOccRn, newLocalsRn, 
+                         lookupOccRn, newLocalBndrsRn, 
                          bindLocatedLocalsFV, bindPatSigTyVarsFV,
                          bindTyVarsRn, extendTyVarEnvFVRn,
-                         bindLocalNames, checkDupRdrNames, mapFvRn,
-                         checkM
+                         bindLocalNames, checkDupRdrNames, mapFvRn
                        )
 import RnNames         ( getLocalNonValBinders, extendGlobalRdrEnvRn )
 import HscTypes        ( GenAvailInfo(..), availsToNameSet )
@@ -42,12 +41,12 @@ import Bag
 import FastString
 import SrcLoc
 import DynFlags        ( DynFlag(..) )
-import Maybe            ( isNothing )
 import BasicTypes       ( Boxity(..) )
 
 import ListSetOps    (findDupsEq)
 
 import Control.Monad
+import Data.Maybe
 \end{code}
 
 \begin{code}
@@ -634,9 +633,9 @@ However, we can also do some scoping checks at the same time.
 
 \begin{code}
 rnTyClDecl :: TyClDecl RdrName -> RnM (TyClDecl Name, FreeVars)
-rnTyClDecl (ForeignType {tcdLName = name, tcdFoType = fo_type, tcdExtName = ext_name})
+rnTyClDecl (ForeignType {tcdLName = name, tcdExtName = ext_name})
   = lookupLocatedTopBndrRn name                `thenM` \ name' ->
-    return (ForeignType {tcdLName = name', tcdFoType = fo_type, tcdExtName = ext_name},
+    return (ForeignType {tcdLName = name', tcdExtName = ext_name},
             emptyFVs)
 
 -- all flavours of type family declarations ("type family", "newtype fanily",
@@ -779,7 +778,7 @@ rnTyClDecl (ClassDecl {tcdCtxt = context, tcdLName = cname,
                -- No need to check for duplicate method signatures
                -- since that is done by RnNames.extendGlobalRdrEnvRn
                -- and the methods are already in scope
-           ; gen_tyvars <- newLocalsRn gen_rdr_tyvars_w_locs
+           ; gen_tyvars <- newLocalBndrsRn gen_rdr_tyvars_w_locs
            ; rnMethodBinds (unLoc cname') (mkSigTvFn sigs') gen_tyvars mbinds }
 
   -- Haddock docs 
@@ -945,7 +944,7 @@ rnATs ats = mapFvRn (wrapLocFstM rn_at) ats
     rn_at (tydecl@TyFamily  {}) = rnFamily tydecl lookupIdxVars
     rn_at (tydecl@TySynonym {}) = 
       do
-        checkM (isNothing (tcdTyPats tydecl)) $ addErr noPatterns
+        unless (isNothing (tcdTyPats tydecl)) $ addErr noPatterns
         rnTyClDecl tydecl
     rn_at _                      = panic "RnSource.rnATs: invalid TyClDecl"