Fix Trac #3012: allow more free-wheeling in standalone deriving

[ghc-hetmet.git] / compiler / main / Finder.lhs

diff --git a/compiler/main/Finder.lhs b/compiler/main/Finder.lhs
index 7587bb3..a1558c8 100644 (file)
--- a/compiler/main/Finder.lhs
+++ b/compiler/main/Finder.lhs
@@ -40,10 +40,8 @@ import Maybes                ( expectJust )
 
 import Distribution.Package hiding (PackageId)
 import Data.IORef      ( IORef, writeIORef, readIORef, modifyIORef )
-import Data.List
 import System.Directory
 import System.FilePath
-import System.IO
 import Control.Monad
 import System.Time     ( ClockTime )
 
@@ -182,10 +180,10 @@ findExposedPackageModule hsc_env mod_name mb_pkg
   | null found_exposed = return (NotFound [] Nothing mod_hiddens pkg_hiddens)
         -- found in just one exposed package:
   | [(pkg_conf, _)] <- found_exposed
-        = let pkgid = mkPackageId (package pkg_conf) in      
+        = let pkgid = packageConfigId pkg_conf in
           findPackageModule_ hsc_env (mkModule pkgid mod_name) pkg_conf
   | otherwise
-        = return (FoundMultiple (map (mkPackageId.package.fst) found_exposed))
+        = return (FoundMultiple (map (packageConfigId.fst) found_exposed))
   where
        dflags = hsc_dflags hsc_env
         found = lookupModuleInAllPackages dflags mod_name
@@ -198,10 +196,10 @@ findExposedPackageModule hsc_env mod_name mb_pkg
 
         is_exposed (pkg_conf,exposed_mod) = exposed pkg_conf && exposed_mod
 
-        mod_hiddens = [ mkPackageId (package pkg_conf)
+        mod_hiddens = [ packageConfigId pkg_conf
                       | (pkg_conf,False) <- found ]
 
-        pkg_hiddens = [ mkPackageId (package pkg_conf)
+        pkg_hiddens = [ packageConfigId pkg_conf
                       | (pkg_conf,_) <- found, not (exposed pkg_conf) ]
 
         _pkg_conf `matches` Nothing  = True
@@ -535,17 +533,20 @@ findObjectLinkable mod obj_fn obj_time = do
 
 cannotFindModule :: DynFlags -> ModuleName -> FindResult -> SDoc
 cannotFindModule = cantFindErr (sLit "Could not find module")
+                               (sLit "Ambiguous module name")
 
 cannotFindInterface  :: DynFlags -> ModuleName -> FindResult -> SDoc
 cannotFindInterface = cantFindErr (sLit "Failed to load interface for")
+                                  (sLit "Ambiguous interface for")
 
-cantFindErr :: LitString -> DynFlags -> ModuleName -> FindResult -> SDoc
-cantFindErr cannot_find _dflags mod_name (FoundMultiple pkgs)
-  = hang (ptext cannot_find <+> quotes (ppr mod_name) <> colon) 2 (
+cantFindErr :: LitString -> LitString -> DynFlags -> ModuleName -> FindResult
+            -> SDoc
+cantFindErr _ multiple_found _ mod_name (FoundMultiple pkgs)
+  = hang (ptext multiple_found <+> quotes (ppr mod_name) <> colon) 2 (
        sep [ptext (sLit "it was found in multiple packages:"),
                hsep (map (text.packageIdString) pkgs)]
     )
-cantFindErr cannot_find dflags mod_name find_result
+cantFindErr cannot_find _ dflags mod_name find_result
   = hang (ptext cannot_find <+> quotes (ppr mod_name) <> colon)
        2 more_info
   where