{-# OPTIONS -#include "Linker.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.176 2004/09/30 10:36:47 simonpj Exp $
+-- $Id: InteractiveUI.hs,v 1.190 2005/02/23 15:38:52 simonmar Exp $
--
-- GHC Interactive User Interface
--
ghciWelcomeMsg
) where
-#include "../includes/ghcconfig.h"
#include "HsVersions.h"
import CompManager
-import HscTypes ( TyThing(..), HomeModInfo(hm_linkable), HomePackageTable,
- isObjectLinkable, GhciMode(..) )
-import IfaceSyn ( IfaceType, IfaceDecl(..), IfaceClassOp(..), IfaceConDecls(..), IfaceConDecl(..),
- IfaceInst(..), pprIfaceDeclHead, pprParendIfaceType, pprIfaceForAllPart )
+import HscTypes ( GhciMode(..) )
+import IfaceSyn ( IfaceDecl(..), IfaceClassOp(..), IfaceConDecls(..),
+ IfaceConDecl(..), IfaceType,
+ IfaceInst(..), 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 Name ( Name, NamedThing(..) )
import OccName ( OccName, isSymOcc, occNameUserString )
-import BasicTypes ( StrictnessMark(..), Fixity, defaultFixity, SuccessFlag(..) )
-import Packages
+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 )
#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
import Control.Exception as Exception
import Data.Dynamic
-import Control.Concurrent
+-- import Control.Concurrent
import Numeric
import Data.List
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 )
" (eg. -v2, -fglasgow-exts, etc.)\n"
-interactiveUI :: [FilePath] -> Maybe String -> IO ()
-interactiveUI srcs maybe_expr = do
- dflags <- getDynFlags
+interactiveUI :: DynFlags -> [FilePath] -> Maybe String -> IO ()
+interactiveUI dflags srcs maybe_expr = do
cmstate <- cmInit Interactive dflags;
-- initial context is just the Prelude
cmstate <- cmSetContext cmstate [] ["Prelude"]
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
Readline.initialize
#endif
cmstate = cmstate,
options = [] }
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
Readline.resetTerminal Nothing
#endif
interactiveLoop is_tty show_prompt
Just expr -> do
-- just evaluate the expression we were given
- runCommand expr
+ runCommandEval expr
return ()
-- and finally, exit
_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
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
mkPrompt toplevs exports
= concat (intersperse " " (map ('*':) toplevs ++ exports)) ++ "> "
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
readlineLoop :: GHCi ()
readlineLoop = do
cmstate <- getCmState
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
| 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
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
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
+ infoThing exts cms name
= do { stuff <- io (cmGetInfo cms name)
; io (putStrLn (showSDocForUser (cmGetPrintUnqual cms) $
- vcat (intersperse (text "") (map showThing stuff)))) }
+ vcat (intersperse (text "") (map (showThing exts) stuff)))) }
-showThing :: GetInfoResult -> SDoc
-showThing (wanted_str, (thing, fixity, src_loc, insts))
- = vcat [ showDecl want_name thing,
+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,
- show_loc src_loc,
vcat (map show_inst insts)]
where
want_name occ = wanted_str == occNameUserString occ
| fix == defaultFixity = empty
| otherwise = ppr fix <+> text wanted_str
+ show_inst (iface_inst, loc)
+ = showWithLoc loc (ptext SLIT("instance") <+> ppr (ifInstHead iface_inst))
+
+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("--")
- show_inst (iface_inst, loc)
- = hang (ptext SLIT("instance") <+> ppr (ifInstHead iface_inst))
- 2 (char '\t' <> show_loc loc)
- -- The tab tries to make them line up a bit
-- 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 :: (OccName -> Bool) -> IfaceDecl -> SDoc
-showDecl want_name (IfaceForeign {ifName = tc})
+showDecl :: Bool -> (OccName -> Bool) -> IfaceDecl -> SDoc
+showDecl exts want_name (IfaceForeign {ifName = tc})
= ppr tc <+> ptext SLIT("is a foreign type")
-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 {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))
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"))
2 (vcat (ppr_trim show_op sigs))
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
(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 ()
setGHCiState state{ cmstate = cmstate2, targets = files }
setContextAfterLoad mods
- dflags <- io (getDynFlags)
+ dflags <- getDynFlags
modulesLoadedMsg ok mods dflags
<- io (cmLoadModules (cmstate state) graph)
setGHCiState state{ cmstate=cmstate1 }
setContextAfterLoad mods
- dflags <- io getDynFlags
+ dflags <- getDynFlags
modulesLoadedMsg ok mods dflags
reloadModule _ = noArgs ":reload"
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)
)))
-----------------------------------------------------------------------------
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
-
- if (not (null leftovers))
+ 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))
then throwDyn (CmdLineError ("unrecognised flags: " ++
unwords leftovers))
else return ()
state <- getGHCiState
cmstate1 <- io (cmUnload (cmstate state))
setGHCiState state{ cmstate = cmstate1, targets = [] }
- dflags <- io getDynFlags
+ dflags <- getDynFlags
io (linkPackages dflags new_pkgs)
setContextAfterLoad []
["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
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
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