{-# OPTIONS -#include "Linker.h" #-}
-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.143 2003/02/12 15:01:35 simonpj Exp $
+-- $Id: InteractiveUI.hs,v 1.191 2005/02/25 13:07:10 simonpj Exp $
--
-- GHC Interactive User Interface
--
--- (c) The GHC Team 2000
+-- (c) The GHC Team 2004
--
-----------------------------------------------------------------------------
module InteractiveUI (
- interactiveUI, -- :: CmState -> [FilePath] -> [LibrarySpec] -> IO ()
+ interactiveUI, -- :: CmState -> [FilePath] -> IO ()
ghciWelcomeMsg
) where
-#include "../includes/config.h"
#include "HsVersions.h"
import CompManager
-import HscTypes ( TyThing(..), HomeModInfo(hm_linkable), HomePackageTable,
- isObjectLinkable )
-import HsSyn ( TyClDecl(..), ConDecl(..), Sig(..) )
-import MkIface ( ifaceTyThing )
+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, handle )
-import Linker ( initLinker, showLinkerState, linkLibraries,
- linkPackages )
+import DriverUtil ( remove_spaces )
+import Linker ( showLinkerState, linkPackages )
import Util
-import Id ( isRecordSelector, isImplicitId, recordSelectorFieldLabel, idName )
-import Class ( className )
-import TyCon ( tyConName, tyConClass_maybe, isPrimTyCon, DataConDetails(..) )
-import DataCon ( dataConName )
-import FieldLabel ( fieldLabelTyCon )
-import SrcLoc ( isGoodSrcLoc )
-import Module ( showModMsg, lookupModuleEnv )
-import Name ( Name, isHomePackageName, nameSrcLoc, nameOccName,
- NamedThing(..) )
-import OccName ( isSymOcc )
-import BasicTypes ( 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 Panic ( GhcException(..), showGhcException )
+import CmdLineOpts ( DynFlags(..), DynFlag(..), dopt )
+import Panic hiding ( showException )
import Config
+import SrcLoc ( SrcLoc, isGoodSrcLoc )
-#ifndef mingw32_TARGET_OS
+#ifndef mingw32_HOST_OS
+import DriverUtil( handle )
import System.Posix
+#if __GLASGOW_HASKELL__ > 504
+ hiding (getEnv)
+#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 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 )
-import GHC.Posix ( setNonBlockingFD )
+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)])
builtin_commands :: [(String, String -> GHCi Bool)]
builtin_commands = [
- ("add", keepGoing addModule),
+ ("add", keepGoingPaths addModule),
("browse", keepGoing browseCmd),
("cd", keepGoing changeDirectory),
("def", keepGoing defineMacro),
("help", keepGoing help),
("?", keepGoing help),
("info", keepGoing info),
- ("load", keepGoing loadModule),
+ ("load", keepGoingPaths loadModule),
("module", keepGoing setContext),
("reload", keepGoing reloadModule),
("set", keepGoing setCmd),
("show", keepGoing showCmd),
("type", keepGoing typeOfExpr),
+ ("kind", keepGoing kindOfType),
("unset", keepGoing unsetOptions),
("undef", keepGoing undefineMacro),
("quit", quit)
keepGoing :: (String -> GHCi ()) -> (String -> GHCi Bool)
keepGoing a str = a str >> return False
+keepGoingPaths :: ([FilePath] -> GHCi ()) -> (String -> GHCi Bool)
+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\
-\ :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 :: CmState -> [FilePath] -> [FilePath] -> IO ()
-interactiveUI cmstate paths cmdline_objs = do
+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
- dflags <- getDynFlags
-
- initLinker
-
- -- link packages requested explicitly on the command-line
- expl <- readIORef v_ExplicitPackages
- linkPackages dflags expl
-
- -- link libraries from the command-line
- linkLibraries dflags cmdline_objs
-
-- Initialise buffering for the *interpreted* I/O system
- cmstate <- initInterpBuffering cmstate dflags
+ initInterpBuffering cmstate
-- We don't want the cmd line to buffer any input that might be
-- intended for the program, so unbuffer stdin.
hSetBuffering stdin NoBuffering
-- initial context is just the Prelude
- cmstate <- cmSetContext cmstate dflags [] ["Prelude"]
+ cmstate <- cmSetContext cmstate [] ["Prelude"]
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
Readline.initialize
#endif
- startGHCi (runGHCi paths dflags)
+ startGHCi (runGHCi srcs dflags maybe_expr)
GHCiState{ progname = "<interactive>",
args = [],
- targets = paths,
+ targets = srcs,
cmstate = cmstate,
options = [] }
-#if HAVE_READLINE_HEADERS && HAVE_READLINE_LIBS
+#ifdef USE_READLINE
Readline.resetTerminal Nothing
#endif
return ()
-runGHCi :: [FilePath] -> DynFlags -> GHCi ()
-runGHCi paths dflags = do
+runGHCi :: [FilePath] -> DynFlags -> Maybe String -> GHCi ()
+runGHCi paths dflags maybe_expr = do
read_dot_files <- io (readIORef v_Read_DotGHCi)
when (read_dot_files) $ do
Left e -> return ()
Right hdl -> fileLoop hdl False
- -- perform a :load for files given on the GHCi command line
+ -- Perform a :load for files given on the GHCi command line
when (not (null paths)) $
ghciHandle showException $
- loadModule (unwords paths)
+ loadModule paths
- -- enter the interactive loop
-#if defined(mingw32_TARGET_OS)
- -- always show prompt, since hIsTerminalDevice returns True for Consoles
- -- only, which we may or may not be running under (cf. Emacs sub-shells.)
- interactiveLoop True
-#else
+ -- if verbosity is greater than 0, or we are connected to a
+ -- terminal, display the prompt in the interactive loop.
is_tty <- io (hIsTerminalDevice stdin)
- interactiveLoop is_tty
-#endif
+ let show_prompt = verbosity dflags > 0 || is_tty
+
+ case maybe_expr of
+ Nothing ->
+ -- enter the interactive loop
+ interactiveLoop is_tty show_prompt
+ Just expr -> do
+ -- just evaluate the expression we were given
+ runCommandEval expr
+ return ()
-- and finally, exit
io $ do when (verbosity dflags > 0) $ putStrLn "Leaving GHCi."
-interactiveLoop is_tty = do
- -- ignore ^C exceptions caught here
+interactiveLoop is_tty show_prompt = do
+ -- Ignore ^C exceptions caught here
ghciHandleDyn (\e -> case e of
- Interrupted -> ghciUnblock (interactiveLoop is_tty)
+ Interrupted -> ghciUnblock (interactiveLoop is_tty show_prompt)
_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 False -- turn off prompt for non-TTY input
+ else fileLoop stdin show_prompt
#else
- fileLoop stdin is_tty
+ fileLoop stdin show_prompt
#endif
checkPerms :: String -> IO Bool
checkPerms name =
-#ifdef mingw32_TARGET_OS
+#ifdef mingw32_HOST_OS
return True
#else
DriverUtil.handle (\_ -> return False) $ 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
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
handler :: Exception -> GHCi Bool
handler exception = do
flushInterpBuffers
+ io installSignalHandlers
ghciHandle handler (showException exception >> return False)
showException (DynException dyn) =
| null (filter (not.isSpace) stmt) = return []
| otherwise
= do st <- getGHCiState
- dflags <- io getDynFlags
- let dflags' = dopt_unset dflags Opt_WarnUnusedBinds
+ cmstate <- getCmState
(new_cmstate, result) <-
io $ withProgName (progname st) $ withArgs (args st) $
- cmRunStmt (cmstate st) dflags' 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
when b (mapM_ (showTypeOfName cmstate) names)
flushInterpBuffers
+ io installSignalHandlers
b <- isOptionSet RevertCAFs
io (when b revertCAFs)
return True
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 ++
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"))
-----------------------------------------------------------------------------
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 -> DynFlags -> IO CmState
-initInterpBuffering cmstate dflags
- = do (cmstate, maybe_hval) <- cmCompileExpr cmstate dflags no_buf_cmd
+initInterpBuffering :: CmState -> IO ()
+initInterpBuffering cmstate
+ = do maybe_hval <- cmCompileExpr cmstate no_buf_cmd
case maybe_hval of
Just hval -> writeIORef turn_off_buffering (unsafeCoerce# hval :: IO ())
other -> panic "interactiveUI:setBuffering"
- (cmstate, maybe_hval) <- cmCompileExpr cmstate dflags flush_cmd
+ maybe_hval <- cmCompileExpr cmstate flush_cmd
case maybe_hval of
Just hval -> writeIORef flush_interp (unsafeCoerce# hval :: IO ())
_ -> panic "interactiveUI:flush"
turnOffBuffering -- Turn it off right now
- return cmstate
+ return ()
flushInterpBuffers :: GHCi ()
help _ = io (putStr helpText)
info :: String -> GHCi ()
-info "" = throwDyn (CmdLineError "syntax: `:i <thing-you-want-info-about>'")
-info s = do
- let names = words s
- init_cms <- getCmState
- dflags <- io getDynFlags
- let
- infoThings cms [] = return cms
- infoThings cms (name:names) = do
- (cms, stuff) <- io (cmInfoThing cms dflags name)
- io (putStrLn (showSDocForUser unqual (
- vcat (intersperse (text "") (map showThing stuff))))
- )
- infoThings cms names
-
- unqual = cmGetPrintUnqual init_cms
-
- showThing (ty_thing, fixity)
- = vcat [ text "-- " <> showTyThing ty_thing,
- showFixity fixity (getName ty_thing),
- ppr (ifaceTyThing ty_thing) ]
-
- showFixity fix name
+info "" = throwDyn (CmdLineError "syntax: ':i <thing-you-want-info-about>'")
+info s = do { let names = words s
+ ; init_cms <- getCmState
+ ; dflags <- getDynFlags
+ ; let exts = dopt Opt_GlasgowExts dflags
+ ; mapM_ (infoThing exts init_cms) names }
+ where
+ infoThing exts cms name
+ = do { stuff <- io (cmGetInfo cms name)
+ ; io (putStrLn (showSDocForUser (cmGetPrintUnqual cms) $
+ vcat (intersperse (text "") (map (showThing exts) stuff)))) }
+
+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
+ want_name occ = wanted_str == occNameUserString occ
+
+ show_fixity fix
| fix == defaultFixity = empty
- | otherwise = ppr fix <+>
- (if isSymOcc (nameOccName name)
- then ppr name
- else char '`' <> ppr name <> char '`')
-
- showTyThing (AClass cl)
- = hcat [ppr cl, text " is a class", showSrcLoc (className cl)]
- showTyThing (ADataCon dc)
- = hcat [ppr dc, text " is a data constructor", showSrcLoc (dataConName dc)]
- showTyThing (ATyCon ty)
- | isPrimTyCon ty
- = hcat [ppr ty, text " is a primitive type constructor"]
- | otherwise
- = hcat [ppr ty, text " is a type constructor", showSrcLoc (tyConName ty)]
- showTyThing (AnId id)
- = hcat [ppr id, text " is a ", idDescr id, showSrcLoc (idName id)]
-
- idDescr id
- | isRecordSelector id =
- case tyConClass_maybe (fieldLabelTyCon (
- recordSelectorFieldLabel id)) of
- Nothing -> text "record selector"
- Just c -> text "method in class " <> ppr c
- | otherwise = text "variable"
-
- -- also print out the source location for home things
- showSrcLoc name
- | isHomePackageName name && isGoodSrcLoc loc
- = hsep [ text ", defined at", ppr loc ]
+ | 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("--")
+
+
+-- 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 exts want_name (IfaceId {ifName = var, ifType = ty})
+ = ppr var <+> dcolon <+> showType exts 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 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 (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 (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)
+ show_guts con _ tys flds
+ = ppr_bndr con <+> braces (sep (punctuate comma (ppr_trim show_fld (tys `zip` flds))))
+ where
+ show_fld (bty, fld) | want_name tycon || want_name con || want_name fld
+ = Just (ppr_bndr fld <+> dcolon <+> ppr_bangty bty)
+ | otherwise = Nothing
+
+ (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
+ add_bars (c:cs) = equals <+> sep (c : map (char '|' <+>) cs)
+
+ ppr_bangty (ty, str) = ppr_str str <> pprParendIfaceType ty
+ ppr_str MarkedStrict = char '!'
+ ppr_str MarkedUnboxed = ptext SLIT("!!")
+ ppr_str NotMarkedStrict = empty
+
+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 <+> showType exts ty)
| otherwise
- = empty
- where loc = nameSrcLoc name
+ = 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
+ = snd (foldr go (False, []) xs)
+ where
+ go x (eliding, so_far)
+ | Just doc <- show x = (False, doc : so_far)
+ | otherwise = if eliding then (True, so_far)
+ else (True, ptext SLIT("...") : so_far)
+
+ppr_bndr :: OccName -> SDoc
+-- Wrap operators in ()
+ppr_bndr occ = parenSymOcc occ (ppr occ)
- cms <- infoThings init_cms names
- setCmState cms
- return ()
-addModule :: String -> GHCi ()
-addModule str = do
- let files = words str
+-----------------------------------------------------------------------------
+-- Commands
+
+addModule :: [FilePath] -> GHCi ()
+addModule files = do
state <- getGHCiState
- dflags <- io (getDynFlags)
io (revertCAFs) -- always revert CAFs on load/add.
+ files <- mapM expandPath files
let new_targets = files ++ targets state
- graph <- io (cmDepAnal (cmstate state) dflags new_targets)
- (cmstate1, ok, mods) <- io (cmLoadModules (cmstate state) dflags graph)
+ graph <- io (cmDepAnal (cmstate state) new_targets)
+ (cmstate1, ok, mods) <- io (cmLoadModules (cmstate state) graph)
setGHCiState state{ cmstate = cmstate1, targets = new_targets }
setContextAfterLoad mods
+ dflags <- getDynFlags
modulesLoadedMsg ok mods dflags
changeDirectory :: String -> GHCi ()
-changeDirectory ('~':d) = do
- tilde <- io (getEnv "HOME") -- will fail if HOME not defined
- io (setCurrentDirectory (tilde ++ '/':d))
-changeDirectory d = io (setCurrentDirectory d)
+changeDirectory dir = do
+ state <- getGHCiState
+ when (targets state /= []) $
+ 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 []
+ dir <- expandPath dir
+ io (setCurrentDirectory dir)
defineMacro :: String -> GHCi ()
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
-- compile the expression
cms <- getCmState
- dflags <- io getDynFlags
- (new_cmstate, maybe_hv) <- io (cmCompileExpr cms dflags new_expr)
- setCmState new_cmstate
+ maybe_hv <- io (cmCompileExpr cms new_expr)
case maybe_hv of
Nothing -> return ()
Just hv -> io (writeIORef commands --
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))
-loadModule :: String -> GHCi ()
-loadModule str = timeIt (loadModule' str)
+loadModule :: [FilePath] -> GHCi ()
+loadModule fs = timeIt (loadModule' fs)
-loadModule' str = do
- let files = words str
+loadModule' :: [FilePath] -> GHCi ()
+loadModule' files = do
state <- getGHCiState
- dflags <- io getDynFlags
+
+ -- expand tildes
+ files <- mapM expandPath files
-- do the dependency anal first, so that if it fails we don't throw
-- away the current set of modules.
- graph <- io (cmDepAnal (cmstate state) dflags files)
+ graph <- io (cmDepAnal (cmstate state) files)
-- Dependency anal ok, now unload everything
- cmstate1 <- io (cmUnload (cmstate state) dflags)
+ cmstate1 <- io (cmUnload (cmstate state))
setGHCiState state{ cmstate = cmstate1, targets = [] }
io (revertCAFs) -- always revert CAFs on load.
- (cmstate2, ok, mods) <- io (cmLoadModules cmstate1 dflags graph)
+ (cmstate2, ok, mods) <- io (cmLoadModules cmstate1 graph)
setGHCiState state{ cmstate = cmstate2, targets = files }
setContextAfterLoad mods
+ dflags <- getDynFlags
modulesLoadedMsg ok mods dflags
reloadModule :: String -> GHCi ()
reloadModule "" = do
state <- getGHCiState
- dflags <- io getDynFlags
case targets state of
[] -> io (putStr "no current target\n")
paths -> do
-- do the dependency anal first, so that if it fails we don't throw
-- away the current set of modules.
- graph <- io (cmDepAnal (cmstate state) dflags paths)
+ graph <- io (cmDepAnal (cmstate state) paths)
io (revertCAFs) -- always revert CAFs on reload.
(cmstate1, ok, mods)
- <- io (cmLoadModules (cmstate state) dflags graph)
+ <- io (cmLoadModules (cmstate state) graph)
setGHCiState state{ cmstate=cmstate1 }
setContextAfterLoad mods
+ dflags <- getDynFlags
modulesLoadedMsg ok mods dflags
reloadModule _ = noArgs ":reload"
typeOfExpr :: String -> GHCi ()
typeOfExpr str
= do cms <- getCmState
- dflags <- io getDynFlags
- (new_cmstate, maybe_tystr) <- io (cmTypeOfExpr cms dflags str)
- setCmState new_cmstate
+ maybe_tystr <- io (cmTypeOfExpr cms str)
+ case maybe_tystr of
+ Nothing -> return ()
+ Just tystr -> io (putStrLn tystr)
+
+kindOfType :: String -> GHCi ()
+kindOfType str
+ = do cms <- getCmState
+ maybe_tystr <- io (cmKindOfType cms str)
case maybe_tystr of
Nothing -> return ()
Just tystr -> io (putStrLn tystr)
shellEscape str = io (system str >> return False)
-----------------------------------------------------------------------------
--- Browing a module's contents
+-- Browsing a module's contents
browseCmd :: String -> GHCi ()
browseCmd m =
browseModule m exports_only = do
cms <- getCmState
- dflags <- io getDynFlags
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,
+ -- Temporarily set the context to the module we're interested in,
-- just so we can get an appropriate PrintUnqualified
(as,bs) <- io (cmGetContext cms)
- cms1 <- io (if exports_only then cmSetContext cms dflags [] [prel,m]
- else cmSetContext cms dflags [m] [])
- cms2 <- io (cmSetContext cms1 dflags as bs)
+ cms1 <- io (if exports_only then cmSetContext cms [] [prel,m]
+ else cmSetContext cms [m] [])
+ cms2 <- io (cmSetContext cms1 as bs)
- (cms3, things) <- io (cmBrowseModule cms2 dflags m exports_only)
-
- setCmState cms3
+ things <- io (cmBrowseModule cms2 m exports_only)
let unqual = cmGetPrintUnqual cms1 -- NOTE: cms1 with the new context
- things' = filter wantToSee things
-
- wantToSee (AnId id) = not (isImplicitId id)
- wantToSee (ADataCon _) = False -- They'll come via their TyCon
- wantToSee _ = True
-
- thing_names = map getName things
-
- thingDecl thing@(AnId id) = ifaceTyThing thing
-
- thingDecl thing@(AClass c) =
- let rn_decl = ifaceTyThing thing in
- case rn_decl of
- ClassDecl { tcdSigs = cons } ->
- rn_decl{ tcdSigs = filter methodIsVisible cons }
- other -> other
- where
- methodIsVisible (ClassOpSig n _ _ _) = n `elem` thing_names
-
- thingDecl thing@(ATyCon t) =
- let rn_decl = ifaceTyThing thing in
- case rn_decl of
- TyData { tcdCons = DataCons cons } ->
- rn_decl{ tcdCons = DataCons (filter conIsVisible cons) }
- other -> other
- where
- conIsVisible (ConDecl n _ _ _ _) = n `elem` thing_names
-
+ dflags <- getDynFlags
+ let exts = dopt Opt_GlasgowExts dflags
io (putStrLn (showSDocForUser unqual (
- vcat (map (ppr . thingDecl) things')))
- )
-
- where
+ vcat (map (showDecl exts (const True)) things)
+ )))
-----------------------------------------------------------------------------
-- Setting the module context
newContext mods = do
cms <- getCmState
- dflags <- io getDynFlags
(as,bs) <- separate cms mods [] []
let bs' = if null as && prel `notElem` bs then prel:bs else bs
- cms' <- io (cmSetContext cms dflags as bs')
+ cms' <- io (cmSetContext cms as bs')
setCmState cms'
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"
addToContext mods = do
cms <- getCmState
- dflags <- io getDynFlags
(as,bs) <- io (cmGetContext cms)
(as',bs') <- separate cms mods [] []
let as_to_add = as' \\ (as ++ bs)
bs_to_add = bs' \\ (as ++ bs)
- cms' <- io (cmSetContext cms dflags
+ cms' <- io (cmSetContext cms
(as ++ as_to_add) (bs ++ bs_to_add))
setCmState cms'
removeFromContext mods = do
cms <- getCmState
- dflags <- io getDynFlags
(as,bs) <- io (cmGetContext cms)
(as_to_remove,bs_to_remove) <- separate cms mods [] []
let as' = as \\ (as_to_remove ++ bs_to_remove)
bs' = bs \\ (as_to_remove ++ bs_to_remove)
- cms' <- io (cmSetContext cms dflags as' bs')
+ cms' <- io (cmSetContext cms as' bs')
setCmState cms'
----------------------------------------------------------------------------
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 ()
(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
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)
newPackages new_pkgs = do -- The new packages are already in v_Packages
state <- getGHCiState
- dflags <- io getDynFlags
- cmstate1 <- io (cmUnload (cmstate state) dflags)
+ cmstate1 <- io (cmUnload (cmstate state))
setGHCiState state{ cmstate = cmstate1, targets = [] }
+ 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
let
unqual = cmGetPrintUnqual cms
- showBinding b = putStrLn (showSDocForUser unqual (ppr (ifaceTyThing b)))
+-- showBinding b = putStrLn (showSDocForUser unqual (ppr (ifaceTyThing b)))
+ showBinding b = putStrLn (showSDocForUser unqual (ppr (getName b)))
io (mapM_ showBinding (cmGetBindings cms))
return ()
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
a <- action
allocs2 <- io $ getAllocations
time2 <- io $ getCPUTime
- io $ printTimes (allocs2 - allocs1) (time2 - time1)
+ io $ printTimes (fromIntegral (allocs2 - allocs1))
+ (time2 - time1)
return a
-foreign import ccall "getAllocations" getAllocations :: IO Int
+foreign import ccall unsafe "getAllocations" getAllocations :: IO Int64
+ -- defined in ghc/rts/Stats.c
-printTimes :: Int -> Integer -> IO ()
+printTimes :: Integer -> Integer -> IO ()
printTimes allocs psecs
= do let secs = (fromIntegral psecs / (10^12)) :: Float
secs_str = showFFloat (Just 2) secs
putStrLn (showSDoc (
parens (text (secs_str "") <+> text "secs" <> comma <+>
- int allocs <+> text "bytes")))
+ text (show allocs) <+> text "bytes")))
-----------------------------------------------------------------------------
-- reverting CAFs
foreign import ccall "revertCAFs" rts_revertCAFs :: IO ()
-- Make it "safe", just in case
+
+-- -----------------------------------------------------------------------------
+-- Utils
+
+expandPath :: String -> GHCi String
+expandPath path =
+ case dropWhile isSpace path of
+ ('~':d) -> do
+ tilde <- io (getEnv "HOME") -- will fail if HOME not defined
+ return (tilde ++ '/':d)
+ other ->
+ return other
projects / ghc-hetmet.git / blobdiff