X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fghci%2FInteractiveUI.hs;h=143fb6afd99523efd2b10d1e53d24ced193bad75;hb=a271ad7e6d2b92779a63ab1cc88bc95dc17d6981;hp=3b0baa20001d1732a7e9293b8dd6780e8ca73d50;hpb=10ab808b4c8575f62bcc7998e5ab45fa0e0d33c5;p=ghc-hetmet.git

diff --git a/ghc/compiler/ghci/InteractiveUI.hs b/ghc/compiler/ghci/InteractiveUI.hs
index 3b0baa2..143fb6a 100644
--- a/ghc/compiler/ghci/InteractiveUI.hs
+++ b/ghc/compiler/ghci/InteractiveUI.hs
@@ -1,6 +1,6 @@
 {-# OPTIONS -#include "Linker.h" #-}
 -----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.167 2004/07/21 09:25:42 simonpj Exp $
+-- $Id: InteractiveUI.hs,v 1.193 2005/03/08 09:47:43 simonpj Exp $
 --
 -- GHC Interactive User Interface
 --
@@ -12,31 +12,28 @@ module InteractiveUI (
 	ghciWelcomeMsg
    ) where
 
-#include "../includes/config.h"
 #include "HsVersions.h"
 
 import CompManager
-import HscTypes		( TyThing(..), HomeModInfo(hm_linkable), HomePackageTable,
-			  isObjectLinkable, GhciMode(..) )
-import IfaceSyn		( IfaceType, IfaceDecl(..), IfaceClassOp(..), IfaceConDecls(..), IfaceConDecl(..), 
-		   	  pprIfaceDeclHead, pprParendIfaceType, pprIfaceForAllPart )
+import HscTypes		( GhciMode(..) )
+import IfaceSyn		( IfaceDecl(..), IfaceClassOp(..), IfaceConDecls(..),
+			  IfaceConDecl(..), IfaceType,
+		   	  pprIfaceDeclHead, pprParendIfaceType,
+			  pprIfaceForAllPart, pprIfaceType )
 import FunDeps		( pprFundeps )
 import DriverFlags
 import DriverState
 import DriverUtil	( remove_spaces )
 import Linker		( showLinkerState, linkPackages )
 import Util
-import Module		( showModMsg, lookupModuleEnv )
-import Name		( Name, isHomePackageName, nameSrcLoc, nameOccName,
-			  NamedThing(..) )
-import OccName		( OccName, isSymOcc, occNameUserString )
-import BasicTypes	( StrictnessMark(..), Fixity, defaultFixity, SuccessFlag(..) )
-import Packages
+import Name		( Name, NamedThing(..) )
+import OccName		( OccName, parenSymOcc, occNameUserString )
+import BasicTypes	( StrictnessMark(..), defaultFixity, SuccessFlag(..) )
 import Outputable
-import CmdLineOpts	( DynFlag(..), DynFlags(..), getDynFlags, saveDynFlags,
-			  restoreDynFlags, dopt_unset )
+import CmdLineOpts	( DynFlags(..), DynFlag(..), dopt )
 import Panic 		hiding ( showException )
 import Config
+import SrcLoc		( SrcLoc, isGoodSrcLoc )
 
 #ifndef mingw32_HOST_OS
 import DriverUtil( handle )
@@ -46,7 +43,7 @@ import System.Posix
 #endif
 #endif
 
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
 import Control.Concurrent	( yield )	-- Used in readline loop
 import System.Console.Readline as Readline
 #endif
@@ -55,7 +52,7 @@ import System.Console.Readline as Readline
 
 import Control.Exception as Exception
 import Data.Dynamic
-import Control.Concurrent
+-- import Control.Concurrent
 
 import Numeric
 import Data.List
@@ -63,12 +60,16 @@ import Data.Int		( Int64 )
 import System.Cmd
 import System.CPUTime
 import System.Environment
+import System.Exit	( exitWith, ExitCode(..) )
 import System.Directory
-import System.IO as IO
+import System.IO
+import System.IO.Error as IO
 import Data.Char
 import Control.Monad as Monad
+import Foreign.StablePtr	( newStablePtr )
 
 import GHC.Exts		( unsafeCoerce# )
+import GHC.IOBase	( IOErrorType(InvalidArgument) )
 
 import Data.IORef	( IORef, newIORef, readIORef, writeIORef )
 
@@ -76,12 +77,12 @@ import System.Posix.Internals ( setNonBlockingFD )
 
 -----------------------------------------------------------------------------
 
-ghciWelcomeMsg = "\ 
-\   ___         ___ _\n\ 
-\  / _ \\ /\\  /\\/ __(_)\n\ 
-\ / /_\\// /_/ / /  | |      GHC Interactive, version " ++ cProjectVersion ++ ", for Haskell 98.\n\ 
-\/ /_\\\\/ __  / /___| |      http://www.haskell.org/ghc/\n\ 
-\\\____/\\/ /_/\\____/|_|      Type :? for help.\n"
+ghciWelcomeMsg =
+ "   ___         ___ _\n"++
+ "  / _ \\ /\\  /\\/ __(_)\n"++
+ " / /_\\// /_/ / /  | |      GHC Interactive, version " ++ cProjectVersion ++ ", for Haskell 98.\n"++
+ "/ /_\\\\/ __  / /___| |      http://www.haskell.org/ghc/\n"++
+ "\\____/\\/ /_/\\____/|_|      Type :? for help.\n"
 
 GLOBAL_VAR(commands, builtin_commands, [(String, String -> GHCi Bool)])
 
@@ -115,49 +116,60 @@ keepGoingPaths a str = a (toArgs str) >> return False
 shortHelpText = "use :? for help.\n"
 
 -- NOTE: spaces at the end of each line to workaround CPP/string gap bug.
-helpText = "\ 
-\ Commands available from the prompt:\n\ 
-\\n\ 
-\   <stmt>		       evaluate/run <stmt>\n\ 
-\   :add <filename> ...        add module(s) to the current target set\n\ 
-\   :browse [*]<module>	       display the names defined by <module>\n\ 
-\   :cd <dir>		       change directory to <dir>\n\ 
-\   :def <cmd> <expr>          define a command :<cmd>\n\ 
-\   :help, :?		       display this list of commands\n\ 
-\   :info [<name> ...]         display information about the given names\n\ 
-\   :load <filename> ...       load module(s) and their dependents\n\ 
-\   :module [+/-] [*]<mod> ... set the context for expression evaluation\n\ 
-\   :reload		       reload the current module set\n\ 
-\\n\ 
-\   :set <option> ...	       set options\n\ 
-\   :set args <arg> ...	       set the arguments returned by System.getArgs\n\ 
-\   :set prog <progname>       set the value returned by System.getProgName\n\ 
-\\n\ 
-\   :show modules	       show the currently loaded modules\n\ 
-\   :show bindings	       show the current bindings made at the prompt\n\ 
-\\n\ 
-\   :type <expr>	       show the type of <expr>\n\ 
-\   :kind <type>	       show the kind of <type>\n\ 
-\   :undef <cmd> 	       undefine user-defined command :<cmd>\n\ 
-\   :unset <option> ...	       unset options\n\ 
-\   :quit		       exit GHCi\n\ 
-\   :!<command>		       run the shell command <command>\n\ 
-\\n\ 
-\ Options for `:set' and `:unset':\n\ 
-\\n\ 
-\    +r			revert top-level expressions after each evaluation\n\ 
-\    +s                 print timing/memory stats after each evaluation\n\ 
-\    +t			print type after evaluation\n\ 
-\    -<flags>		most GHC command line flags can also be set here\n\ 
-\                         (eg. -v2, -fglasgow-exts, etc.)\n\ 
-\"
-
-interactiveUI :: [FilePath] -> Maybe String -> IO ()
-interactiveUI srcs maybe_expr = do
-   dflags <- getDynFlags
+helpText =
+ " Commands available from the prompt:\n" ++
+ "\n" ++
+ "   <stmt>                      evaluate/run <stmt>\n" ++
+ "   :add <filename> ...         add module(s) to the current target set\n" ++
+ "   :browse [*]<module>         display the names defined by <module>\n" ++
+ "   :cd <dir>                   change directory to <dir>\n" ++
+ "   :def <cmd> <expr>           define a command :<cmd>\n" ++
+ "   :help, :?                   display this list of commands\n" ++
+ "   :info [<name> ...]          display information about the given names\n" ++
+ "   :load <filename> ...        load module(s) and their dependents\n" ++
+ "   :module [+/-] [*]<mod> ...  set the context for expression evaluation\n" ++
+ "   :reload                     reload the current module set\n" ++
+ "\n" ++
+ "   :set <option> ...           set options\n" ++
+ "   :set args <arg> ...         set the arguments returned by System.getArgs\n" ++
+ "   :set prog <progname>        set the value returned by System.getProgName\n" ++
+ "\n" ++
+ "   :show modules               show the currently loaded modules\n" ++
+ "   :show bindings              show the current bindings made at the prompt\n" ++
+ "\n" ++
+ "   :type <expr>                show the type of <expr>\n" ++
+ "   :kind <type>                show the kind of <type>\n" ++
+ "   :undef <cmd>                undefine user-defined command :<cmd>\n" ++
+ "   :unset <option> ...         unset options\n" ++
+ "   :quit                       exit GHCi\n" ++
+ "   :!<command>                 run the shell command <command>\n" ++
+ "\n" ++
+ " Options for ':set' and ':unset':\n" ++
+ "\n" ++
+ "    +r            revert top-level expressions after each evaluation\n" ++
+ "    +s            print timing/memory stats after each evaluation\n" ++
+ "    +t            print type after evaluation\n" ++
+ "    -<flags>      most GHC command line flags can also be set here\n" ++
+ "                         (eg. -v2, -fglasgow-exts, etc.)\n"
+
+
+interactiveUI :: DynFlags -> [FilePath] -> Maybe String -> IO ()
+interactiveUI dflags srcs maybe_expr = do
 
    cmstate <- cmInit Interactive dflags;
 
+   -- HACK! If we happen to get into an infinite loop (eg the user
+   -- types 'let x=x in x' at the prompt), then the thread will block
+   -- on a blackhole, and become unreachable during GC.  The GC will
+   -- detect that it is unreachable and send it the NonTermination
+   -- exception.  However, since the thread is unreachable, everything
+   -- it refers to might be finalized, including the standard Handles.
+   -- This sounds like a bug, but we don't have a good solution right
+   -- now.
+   newStablePtr stdin
+   newStablePtr stdout
+   newStablePtr stderr
+
    hFlush stdout
    hSetBuffering stdout NoBuffering
 
@@ -171,7 +183,7 @@ interactiveUI srcs maybe_expr = do
 	-- initial context is just the Prelude
    cmstate <- cmSetContext cmstate [] ["Prelude"]
 
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
    Readline.initialize
 #endif
 
@@ -182,7 +194,7 @@ interactiveUI srcs maybe_expr = do
 		   cmstate = cmstate,
 		   options = [] }
 
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
    Readline.resetTerminal Nothing
 #endif
 
@@ -237,7 +249,7 @@ runGHCi paths dflags maybe_expr = do
 	    interactiveLoop is_tty show_prompt
 	Just expr -> do
 	    -- just evaluate the expression we were given
-	    runCommand expr
+	    runCommandEval expr
 	    return ()
 
   -- and finally, exit
@@ -251,7 +263,7 @@ interactiveLoop is_tty show_prompt = do
 			_other      -> return ()) $ do
 
   -- read commands from stdin
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
   if (is_tty) 
 	then readlineLoop
 	else fileLoop stdin show_prompt
@@ -298,8 +310,14 @@ fileLoop hdl prompt = do
    when prompt (io (putStr (mkPrompt mod imports)))
    l <- io (IO.try (hGetLine hdl))
    case l of
-	Left e | isEOFError e -> return ()
-	       | otherwise    -> io (ioError e)
+	Left e | isEOFError e		   -> return ()
+	       | InvalidArgument <- etype  -> return ()
+	       | otherwise		   -> io (ioError e)
+		where etype = ioeGetErrorType e
+		-- treat InvalidArgument in the same way as EOF:
+		-- this can happen if the user closed stdin, or
+		-- perhaps did getContents which closes stdin at
+		-- EOF.
 	Right l -> 
 	  case remove_spaces l of
 	    "" -> fileLoop hdl prompt
@@ -317,7 +335,7 @@ stringLoop (s:ss) = do
 mkPrompt toplevs exports
    = concat (intersperse " " (map ('*':) toplevs ++ exports)) ++ "> "
 
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
 readlineLoop :: GHCi ()
 readlineLoop = do
    cmstate <- getCmState
@@ -341,6 +359,15 @@ readlineLoop = do
 runCommand :: String -> GHCi Bool
 runCommand c = ghciHandle handler (doCommand c)
 
+-- This version is for the GHC command-line option -e.  The only difference
+-- from runCommand is that it catches the ExitException exception and
+-- exits, rather than printing out the exception.
+runCommandEval c = ghciHandle handleEval (doCommand c)
+  where 
+    handleEval (ExitException code) = io (exitWith code)
+    handleEval e                    = do showException e
+				         io (exitWith (ExitFailure 1))
+
 -- This is the exception handler for exceptions generated by the
 -- user's code; it normally just prints out the exception.  The
 -- handler must be recursive, in case showing the exception causes
@@ -377,16 +404,14 @@ runStmt stmt
  | null (filter (not.isSpace) stmt) = return []
  | otherwise
  = do st <- getGHCiState
-      dflags <- io getDynFlags
-      let cm_state' = cmSetDFlags (cmstate st)
-			 	  (dopt_unset dflags Opt_WarnUnusedBinds)
+      cmstate <- getCmState
       (new_cmstate, result) <- 
 	io $ withProgName (progname st) $ withArgs (args st) $
-	     cmRunStmt cm_state' stmt
+	     cmRunStmt cmstate stmt
       setGHCiState st{cmstate = new_cmstate}
       case result of
 	CmRunFailed      -> return []
-	CmRunException e -> showException e >> return []
+	CmRunException e -> throw e  -- this is caught by runCommand(Eval)
 	CmRunOk names    -> return names
 
 -- possibly print the type and revert CAFs after evaluating an expression
@@ -414,7 +439,7 @@ specialCommand str = do
   let (cmd,rest) = break isSpace str
   cmds <- io (readIORef commands)
   case [ (s,f) | (s,f) <- cmds, prefixMatch cmd s ] of
-     []      -> io (hPutStr stdout ("unknown command `:" ++ cmd ++ "'\n" 
+     []      -> io (hPutStr stdout ("unknown command ':" ++ cmd ++ "'\n" 
 		                    ++ shortHelpText) >> return False)
      [(_,f)] -> f (dropWhile isSpace rest)
      cs      -> io (hPutStrLn stdout ("prefix " ++ cmd ++ 
@@ -422,7 +447,7 @@ specialCommand str = do
 	         	     	       foldr1 (\a b -> a ++ ',':b) (map fst cs)
 					 ++ ")") >> return False)
 
-noArgs c = throwDyn (CmdLineError ("command `" ++ c ++ "' takes no arguments"))
+noArgs c = throwDyn (CmdLineError ("command '" ++ c ++ "' takes no arguments"))
 
 
 -----------------------------------------------------------------------------
@@ -432,9 +457,9 @@ noArgs c = throwDyn (CmdLineError ("command `" ++ c ++ "' takes no arguments"))
 GLOBAL_VAR(flush_interp,       error "no flush_interp", IO ())
 GLOBAL_VAR(turn_off_buffering, error "no flush_stdout", IO ())
 
-no_buf_cmd = "IO.hSetBuffering IO.stdout IO.NoBuffering" ++
-	     " Prelude.>> IO.hSetBuffering IO.stderr IO.NoBuffering"
-flush_cmd  = "IO.hFlush IO.stdout Prelude.>> IO.hFlush IO.stderr"
+no_buf_cmd = "System.IO.hSetBuffering System.IO.stdout System.IO.NoBuffering" ++
+	     " Prelude.>> System.IO.hSetBuffering System.IO.stderr System.IO.NoBuffering"
+flush_cmd  = "System.IO.hFlush System.IO.stdout Prelude.>> System.IO.hFlush IO.stderr"
 
 initInterpBuffering :: CmState -> IO ()
 initInterpBuffering cmstate
@@ -471,47 +496,80 @@ help :: String -> GHCi ()
 help _ = io (putStr helpText)
 
 info :: String -> GHCi ()
-info "" = throwDyn (CmdLineError "syntax: `:i <thing-you-want-info-about>'")
+info "" = throwDyn (CmdLineError "syntax: ':i <thing-you-want-info-about>'")
 info s  = do { let names = words s
 	     ; init_cms <- getCmState
-	     ; mapM_ (infoThing init_cms) names }
+	     ; dflags <- getDynFlags
+	     ; let exts = dopt Opt_GlasgowExts dflags
+	     ; mapM_ (infoThing exts init_cms) names }
   where
-    infoThing cms name
-	= do { stuff <- io (cmInfoThing cms name)
+    infoThing exts cms name
+	= do { stuff <- io (cmGetInfo cms name)
 	     ; io (putStrLn (showSDocForUser (cmGetPrintUnqual cms) $
-     		   vcat (intersperse (text "") (map (showThing name) stuff)))) }
+     		   vcat (intersperse (text "") (map (showThing exts) stuff)))) }
 
-showThing :: String -> (IfaceDecl, Fixity) -> SDoc
-showThing name (thing, fixity) 
-    = vcat [ showDecl (\occ -> name == occNameUserString occ) thing, 
-	     showFixity fixity ]
+showThing :: Bool -> GetInfoResult -> SDoc
+showThing exts (wanted_str, thing, fixity, src_loc, insts) 
+    = vcat [ showWithLoc src_loc (showDecl exts want_name thing),
+	     show_fixity fixity,
+	     vcat (map show_inst insts)]
   where
-    showFixity fix 
+    want_name occ = wanted_str == occNameUserString occ
+
+    show_fixity fix 
 	| fix == defaultFixity = empty
-	| otherwise            = ppr fix <+> text name
+	| otherwise            = ppr fix <+> text wanted_str
+
+    show_inst (inst_ty, loc)
+	= showWithLoc loc (ptext SLIT("instance") <+> ppr inst_ty)
+
+showWithLoc :: SrcLoc -> SDoc -> SDoc
+showWithLoc loc doc 
+    = hang doc 2 (char '\t' <> show_loc loc)
+		-- The tab tries to make them line up a bit
+  where
+    show_loc loc	-- The ppr function for SrcLocs is a bit wonky
+	| isGoodSrcLoc loc = comment <+> ptext SLIT("Defined at") <+> ppr loc
+	| otherwise	   = comment <+> ppr loc
+    comment = ptext SLIT("--")
+
+
+-- Now there is rather a lot of goop just to print declarations in a
+-- civilised way with "..." for the parts we are less interested in.
 
--- Now there is rather a lot of goop just to print declarations in a civilised way
--- with "..." for the parts we are less interested in.
+showDecl :: Bool -> (OccName -> Bool) -> IfaceDecl -> SDoc
+showDecl exts want_name (IfaceForeign {ifName = tc})
+  = ppr tc <+> ptext SLIT("is a foreign type")
 
-showDecl :: (OccName -> Bool) -> IfaceDecl -> SDoc
-showDecl want_name (IfaceId {ifName = var, ifType = ty})
-  = ppr var <+> dcolon <+> ppr ty 
+showDecl exts want_name (IfaceId {ifName = var, ifType = ty})
+  = ppr var <+> dcolon <+> showType exts ty 
 
-showDecl want_name (IfaceSyn {ifName = tycon, ifTyVars = tyvars, ifSynRhs = mono_ty})
+showDecl exts want_name (IfaceSyn {ifName = tycon, ifTyVars = tyvars, ifSynRhs = mono_ty})
   = hang (ptext SLIT("type") <+> pprIfaceDeclHead [] tycon tyvars)
        2 (equals <+> ppr mono_ty)
 
-showDecl want_name (IfaceData {ifCtxt = context, ifName = tycon, 
+showDecl exts want_name (IfaceData {ifName = tycon, 
 		     ifTyVars = tyvars, ifCons = condecls})
   = hang (pp_nd <+> pprIfaceDeclHead context tycon tyvars)
        2 (add_bars (ppr_trim show_con cs))
   where
-    show_con (IfaceConDecl con_name is_infix ex_tvs ex_cxt tys strs flds)
+    show_con (IfVanillaCon { ifConOcc = con_name, ifConInfix = is_infix, ifConArgTys = tys, 
+			     ifConStricts = strs, ifConFields = flds})
 	| want_name tycon || want_name con_name || any want_name flds
-	= Just (pprIfaceForAllPart ex_tvs ex_cxt (show_guts con_name is_infix tys_w_strs flds))
+	= Just (show_guts con_name is_infix tys_w_strs flds)
 	| otherwise = Nothing
 	where
 	  tys_w_strs = tys `zip` (strs ++ repeat NotMarkedStrict)
+    show_con (IfGadtCon { ifConOcc = con_name, ifConTyVars = tvs, ifConCtxt = theta, 
+			  ifConArgTys = arg_tys, ifConResTys = res_tys, ifConStricts = strs })
+	| want_name tycon || want_name con_name
+	= Just (ppr_bndr con_name <+> colon <+> pprIfaceForAllPart tvs theta pp_tau)
+	| otherwise = Nothing
+	where
+	  tys_w_strs = arg_tys `zip` (strs ++ repeat NotMarkedStrict)
+	  pp_tau = foldr add pp_res_ty tys_w_strs
+	  pp_res_ty = ppr_bndr tycon <+> hsep (map pprParendIfaceType res_tys)
+	  add bty pp_ty = ppr_bangty bty <+> arrow <+> pp_ty
 
     show_guts con True [ty1, ty2] flds = sep [ppr_bangty ty1, ppr con, ppr_bangty ty2]
     show_guts con _ tys []   = ppr_bndr con <+> sep (map ppr_bangty tys)
@@ -522,10 +580,11 @@ showDecl want_name (IfaceData {ifCtxt = context, ifName = tycon,
 			      = Just (ppr_bndr fld <+> dcolon <+> ppr_bangty bty)
 			      | otherwise = Nothing
 
-    (pp_nd, cs) = case condecls of
-		    IfAbstractTyCon -> (ptext SLIT("data"),    [])
-		    IfDataTyCon cs  -> (ptext SLIT("data"),    cs)
-		    IfNewTyCon c    -> (ptext SLIT("newtype"), [c])
+    (pp_nd, context, cs) = case condecls of
+		    IfAbstractTyCon 	      -> (ptext SLIT("data"), [],   [])
+		    IfDataTyCon (Just cxt) cs -> (ptext SLIT("data"), cxt, cs)
+		    IfDataTyCon Nothing cs    -> (ptext SLIT("data"), [],  cs)
+		    IfNewTyCon c    	      -> (ptext SLIT("newtype"), [], [c])
 
     add_bars []      = empty
     add_bars [c]     = equals <+> c
@@ -536,15 +595,23 @@ showDecl want_name (IfaceData {ifCtxt = context, ifName = tycon,
     ppr_str MarkedUnboxed   = ptext SLIT("!!")
     ppr_str NotMarkedStrict = empty
 
-showDecl want_name (IfaceClass {ifCtxt = context, ifName = clas, ifTyVars = tyvars, 
+showDecl exts want_name (IfaceClass {ifCtxt = context, ifName = clas, ifTyVars = tyvars, 
 		      ifFDs = fds, ifSigs = sigs})
   = hang (ptext SLIT("class") <+> pprIfaceDeclHead context clas tyvars
-		<+> pprFundeps fds <+> ptext SLIT("where"))
+		<+> pprFundeps fds <+> opt_where)
        2 (vcat (ppr_trim show_op sigs))
   where
+    opt_where | null sigs = empty
+	      | otherwise = ptext SLIT("where")
     show_op (IfaceClassOp op dm ty) 
-	| want_name clas || want_name op = Just (ppr_bndr op <+> dcolon <+> ppr ty)
-	| otherwise			 = Nothing
+	| want_name clas || want_name op 
+	= Just (ppr_bndr op <+> dcolon <+> showType exts ty)
+	| otherwise
+	= Nothing
+
+showType :: Bool -> IfaceType -> SDoc
+showType True  ty = pprIfaceType ty -- -fglasgow-exts: print with the foralls
+showType False ty = ppr ty	    -- otherwise, print without the foralls
 
 ppr_trim :: (a -> Maybe SDoc) -> [a] -> [SDoc]
 ppr_trim show xs
@@ -557,18 +624,7 @@ ppr_trim show xs
 
 ppr_bndr :: OccName -> SDoc
 -- Wrap operators in ()
-ppr_bndr occ | isSymOcc occ = parens (ppr occ)
-	     | otherwise    = ppr occ
-
-{-
-	-- also print out the source location for home things
-    showSrcLoc name
-	| isHomePackageName name && isGoodSrcLoc loc
-	= hsep [ text ", defined at", ppr loc ]
-	| otherwise
-	= empty
-	where loc = nameSrcLoc name
--}
+ppr_bndr occ = parenSymOcc occ (ppr occ)
 
 
 -----------------------------------------------------------------------------
@@ -584,15 +640,14 @@ addModule files = do
   (cmstate1, ok, mods) <- io (cmLoadModules (cmstate state) graph)
   setGHCiState state{ cmstate = cmstate1, targets = new_targets }
   setContextAfterLoad mods
-  dflags <- io getDynFlags
+  dflags <- getDynFlags
   modulesLoadedMsg ok mods dflags
 
 changeDirectory :: String -> GHCi ()
 changeDirectory dir = do
   state    <- getGHCiState
   when (targets state /= []) $
-	io $ putStr "Warning: changing directory causes all loaded modules to be unloaded, \n\ 
-	\because the search path has changed.\n"
+	io $ putStr "Warning: changing directory causes all loaded modules to be unloaded,\nbecause the search path has changed.\n"
   cmstate1 <- io (cmUnload (cmstate state))
   setGHCiState state{ cmstate = cmstate1, targets = [] }
   setContextAfterLoad []
@@ -608,7 +663,7 @@ defineMacro s = do
 	else do
   if (macro_name `elem` map fst cmds) 
 	then throwDyn (CmdLineError 
-		("command `" ++ macro_name ++ "' is already defined"))
+		("command '" ++ macro_name ++ "' is already defined"))
 	else do
 
   -- give the expression a type signature, so we can be sure we're getting
@@ -633,11 +688,11 @@ undefineMacro macro_name = do
   cmds <- io (readIORef commands)
   if (macro_name `elem` map fst builtin_commands) 
 	then throwDyn (CmdLineError
-		("command `" ++ macro_name ++ "' cannot be undefined"))
+		("command '" ++ macro_name ++ "' cannot be undefined"))
 	else do
   if (macro_name `notElem` map fst cmds) 
 	then throwDyn (CmdLineError 
-		("command `" ++ macro_name ++ "' not defined"))
+		("command '" ++ macro_name ++ "' not defined"))
 	else do
   io (writeIORef commands (filter ((/= macro_name) . fst) cmds))
 
@@ -665,7 +720,7 @@ loadModule' files = do
   setGHCiState state{ cmstate = cmstate2, targets = files }
 
   setContextAfterLoad mods
-  dflags <- io (getDynFlags)
+  dflags <- getDynFlags
   modulesLoadedMsg ok mods dflags
 
 
@@ -684,7 +739,7 @@ reloadModule "" = do
 		<- io (cmLoadModules (cmstate state) graph)
         setGHCiState state{ cmstate=cmstate1 }
 	setContextAfterLoad mods
-	dflags <- io getDynFlags
+	dflags <- getDynFlags
 	modulesLoadedMsg ok mods dflags
 
 reloadModule _ = noArgs ":reload"
@@ -745,7 +800,7 @@ browseModule m exports_only = do
 
   is_interpreted <- io (cmModuleIsInterpreted cms m)
   when (not is_interpreted && not exports_only) $
-	throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
+	throwDyn (CmdLineError ("module '" ++ m ++ "' is not interpreted"))
 
   -- Temporarily set the context to the module we're interested in,
   -- just so we can get an appropriate PrintUnqualified
@@ -758,8 +813,10 @@ browseModule m exports_only = do
 
   let unqual = cmGetPrintUnqual cms1 -- NOTE: cms1 with the new context
 
+  dflags <- getDynFlags
+  let exts = dopt Opt_GlasgowExts dflags
   io (putStrLn (showSDocForUser unqual (
-   	 vcat (map (showDecl (const True)) things)
+   	 vcat (map (showDecl exts (const True)) things)
       )))
 
 -----------------------------------------------------------------------------
@@ -788,7 +845,7 @@ separate cmstate []           as bs = return (as,bs)
 separate cmstate (('*':m):ms) as bs = do
    b <- io (cmModuleIsInterpreted cmstate m)
    if b then separate cmstate ms (m:as) bs
-   	else throwDyn (CmdLineError ("module `" ++ m ++ "' is not interpreted"))
+   	else throwDyn (CmdLineError ("module '" ++ m ++ "' is not interpreted"))
 separate cmstate (m:ms)       as bs = separate cmstate ms as (m:bs)
 
 prel = "Prelude"
@@ -862,28 +919,21 @@ setOptions wds =
       mapM_ setOpt plus_opts
 
       -- now, the GHC flags
-      pkgs_before <- io (readIORef v_ExplicitPackages)
-      leftovers   <- io (processArgs static_flags minus_opts [])
-      pkgs_after  <- io (readIORef v_ExplicitPackages)
-
-      -- update things if the users wants more packages
-      let new_packages = pkgs_after \\ pkgs_before
-      when (not (null new_packages)) $
-	 newPackages new_packages
-
-      -- don't forget about the extra command-line flags from the 
-      -- extra_ghc_opts fields in the new packages
-      new_package_details <- io (getPackageDetails new_packages)
-      let pkg_extra_opts = concatMap extra_ghc_opts new_package_details
-      pkg_extra_dyn <- io (processArgs static_flags pkg_extra_opts [])
+      leftovers <- io $ processStaticFlags minus_opts
 
       -- then, dynamic flags
-      io $ do 
-	restoreDynFlags
-        leftovers <- processArgs dynamic_flags (leftovers ++ pkg_extra_dyn) []
-	saveDynFlags
+      dflags <- getDynFlags
+      (dflags',leftovers) <- io $ processDynamicFlags leftovers dflags
+      setDynFlags dflags'
+
+        -- update things if the users wants more packages
+{- TODO:
+        let new_packages = pkgs_after \\ pkgs_before
+        when (not (null new_packages)) $
+  	   newPackages new_packages
+-}
 
-        if (not (null leftovers))
+      if (not (null leftovers))
 		then throwDyn (CmdLineError ("unrecognised flags: " ++ 
 						unwords leftovers))
 		else return ()
@@ -897,7 +947,7 @@ unsetOptions str
 	   (plus_opts, rest2)  = partition isPlus rest1
 
        if (not (null rest2)) 
-	  then io (putStrLn ("unknown option: `" ++ head rest2 ++ "'"))
+	  then io (putStrLn ("unknown option: '" ++ head rest2 ++ "'"))
 	  else do
 
        mapM_ unsetOpt plus_opts
@@ -915,12 +965,12 @@ isPlus _ = False
 
 setOpt ('+':str)
   = case strToGHCiOpt str of
-	Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+	Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
 	Just o  -> setOption o
 
 unsetOpt ('+':str)
   = case strToGHCiOpt str of
-	Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+	Nothing -> io (putStrLn ("unknown option: '" ++ str ++ "'"))
 	Just o  -> unsetOption o
 
 strToGHCiOpt :: String -> (Maybe GHCiOption)
@@ -938,7 +988,7 @@ newPackages new_pkgs = do	-- The new packages are already in v_Packages
   state    <- getGHCiState
   cmstate1 <- io (cmUnload (cmstate state))
   setGHCiState state{ cmstate = cmstate1, targets = [] }
-  dflags   <- io getDynFlags
+  dflags   <- getDynFlags
   io (linkPackages dflags new_pkgs)
   setContextAfterLoad []
 
@@ -952,22 +1002,10 @@ showCmd str =
 	["linker"]   -> io showLinkerState
 	_ -> throwDyn (CmdLineError "syntax:  :show [modules|bindings]")
 
-showModules = do
-  cms <- getCmState
-  let (mg, hpt) = cmGetModInfo cms
-  mapM_ (showModule hpt) mg
-
-
-showModule :: HomePackageTable -> ModSummary -> GHCi ()
-showModule hpt mod_summary
-  = case lookupModuleEnv hpt mod of
-	Nothing	      -> panic "missing linkable"
-	Just mod_info -> io (putStrLn (showModMsg obj_linkable mod locn))
-		      where
-			 obj_linkable = isObjectLinkable (hm_linkable mod_info)
-  where
-    mod = ms_mod mod_summary
-    locn = ms_location mod_summary
+showModules
+  = do	{ cms <- getCmState
+	; let show_one ms = io (putStrLn (cmShowModule cms ms))
+	; mapM_ show_one (cmGetModuleGraph cms) }
 
 showBindings = do
   cms <- getCmState
@@ -1018,6 +1056,10 @@ setGHCiState s = GHCi $ \r -> writeIORef r s
 getCmState = getGHCiState >>= return . cmstate
 setCmState cms = do s <- getGHCiState; setGHCiState s{cmstate=cms}
 
+getDynFlags = getCmState >>= return . cmGetDFlags
+
+setDynFlags dflags = do s <- getCmState; setCmState (cmSetDFlags s dflags)
+
 isOptionSet :: GHCiOption -> GHCi Bool
 isOptionSet opt
  = do st <- getGHCiState