-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.14 2000/11/22 17:51:16 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.28 2001/01/18 12:54:16 simonmar Exp $
--
-- GHC Interactive User Interface
--
import CompManager
import CmStaticInfo
import DriverFlags
-import DriverUtil
import DriverState
import Linker
import Module
import Outputable
import Util
+import PprType {- instance Outputable Type; do not delete -}
+import Panic ( GhcException(..) )
import Exception
+#ifndef NO_READLINE
import Readline
+#endif
import IOExts
+import Numeric
+import List
import System
+import CPUTime
import Directory
import IO
import Char
+import Monad ( when )
+
-----------------------------------------------------------------------------
\|| || || || || (| Bug reports to: glasgow-haskell-bugs@haskell.org \n\
\(|___|| || || (|__|) \\\\______________________________________________________\n"
-commands :: [(String, String -> GHCi ())]
+commands :: [(String, String -> GHCi Bool)]
commands = [
- ("add", addModule),
- ("cd", changeDirectory),
- ("help", help),
- ("?", help),
- ("load", loadModule),
- ("module", setContext),
- ("reload", reloadModule),
- ("set", setOptions),
- ("type", typeOfExpr),
+ ("add", keepGoing addModule),
+ ("cd", keepGoing changeDirectory),
+ ("help", keepGoing help),
+ ("?", keepGoing help),
+ ("load", keepGoing loadModule),
+ ("module", keepGoing setContext),
+ ("reload", keepGoing reloadModule),
+ ("set", keepGoing setOptions),
+ ("type", keepGoing typeOfExpr),
+ ("unset", keepGoing unsetOptions),
("quit", quit)
]
+keepGoing :: (String -> GHCi ()) -> (String -> GHCi Bool)
+keepGoing a str = a str >> return False
+
shortHelpText = "use :? for help.\n"
helpText = "\
+\ Commands available from the prompt:\n\
+\\
\ <expr> evaluate <expr>\n\
\ :add <filename> add a module to the current set\n\
\ :cd <dir> change directory to <dir>\n\
\ :module <mod> set the context for expression evaluation to <mod>\n\
\ :reload reload the current module set\n\
\ :set <option> ... set options\n\
+\ :unset <option> ... unset options\n\
\ :type <expr> show the type of <expr>\n\
\ :quit exit GHCi\n\
\ :!<command> run the shell command <command>\n\
+\\
+\ Options for `:set' and `:unset':\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 -> [ModuleName] -> IO ()
-interactiveUI st mods = do
+interactiveUI :: CmState -> Maybe FilePath -> IO ()
+interactiveUI cmstate mod = do
hPutStrLn stdout ghciWelcomeMsg
hFlush stdout
hSetBuffering stdout NoBuffering
pkgs <- getPackageInfo
linkPackages (reverse pkgs)
+ (cmstate', ok, mods) <-
+ case mod of
+ Nothing -> return (cmstate, True, [])
+ Just m -> cmLoadModule cmstate m
+
#ifndef NO_READLINE
Readline.initialize
#endif
(unGHCi uiLoop) GHCiState{ modules = mods,
current_module = this_mod,
- target = Nothing,
- cmstate = st }
+ target = mod,
+ cmstate = cmstate',
+ options = [ShowTiming],
+ last_expr = Nothing}
return ()
uiLoop :: GHCi ()
#ifndef NO_READLINE
l <- io (readline (moduleNameUserString (current_module st) ++ "> "))
#else
- l <- io (hGetLine stdin)
+ l_ok <- io (hGetLine stdin)
+ let l = Just l_ok
#endif
case l of
Nothing -> exitGHCi
#ifndef NO_READLINE
io (addHistory l)
#endif
- runCommand l
- uiLoop
+ quit <- runCommand l
+ if quit then exitGHCi else uiLoop
-exitGHCi = io $ do putStrLn "Leaving GHCi."; exitWith ExitSuccess
+exitGHCi = io $ do putStrLn "Leaving GHCi."
-- Top level exception handler, just prints out the exception
-- and carries on.
+runCommand :: String -> GHCi Bool
runCommand c =
- ghciHandle ( \other_exception ->io (putStrLn (show other_exception) )) $
+ ghciHandle (
+ \other_exception
+ -> io (putStrLn (show other_exception)) >> return False
+ ) $
ghciHandleDyn
(\dyn -> case dyn of
PhaseFailed phase code ->
io ( putStrLn ("Phase " ++ phase ++ " failed (code "
++ show code ++ ")"))
Interrupted -> io (putStrLn "Interrupted.")
- _ -> io (putStrLn (show (dyn :: BarfKind)))
+ _ -> io (putStrLn (show (dyn :: GhcException)))
+ >> return False
) $
doCommand c
doCommand (':' : command) = specialCommand command
doCommand expr
+ = do expr_expanded <- expandExpr expr
+ -- io (putStrLn ( "Before: " ++ expr ++ "\nAfter: " ++ expr_expanded))
+ expr_ok <- timeIt (do ok <- evalExpr expr_expanded
+ when ok (evalExpr "PrelHandle.hFlush PrelHandle.stdout" >> return ())
+ when ok (evalExpr "PrelHandle.hFlush PrelHandle.stderr" >> return ())
+ return ok)
+ when expr_ok (rememberExpr expr_expanded)
+ return False
+
+-- Returned Bool indicates whether or not the expr was successfully
+-- parsed, renamed and typechecked.
+evalExpr :: String -> GHCi Bool
+evalExpr expr
+ | null (filter (not.isSpace) expr)
+ = return False
+ | otherwise
= do st <- getGHCiState
dflags <- io (getDynFlags)
- (new_cmstate, maybe_hvalue) <-
- io (cmGetExpr (cmstate st) dflags (current_module st) expr)
+ (new_cmstate, maybe_stuff) <-
+ io (cmGetExpr (cmstate st) dflags (current_module st) expr True)
setGHCiState st{cmstate = new_cmstate}
- case maybe_hvalue of
- Nothing -> return ()
- Just hv -> io (cmRunExpr hv)
+ case maybe_stuff of
+ Nothing -> return False
+ Just (hv, unqual, ty)
+ -> do io (cmRunExpr hv)
+ b <- isOptionSet ShowType
+ io (when b (printForUser stdout unqual (text "::" <+> ppr ty)))
+ return True
+
{-
let (mod,'.':str) = break (=='.') expr
case cmLookupSymbol (mkOrig varName (mkModuleName mod) (_PK_ str)) (cmstate st) of
return ()
-}
-specialCommand ('!':str) = shellEscape (dropWhile isSpace str)
+specialCommand :: String -> GHCi Bool
+specialCommand ('!':str) = shellEscape (dropWhile isSpace str)
specialCommand str = do
let (cmd,rest) = break isSpace str
case [ (s,f) | (s,f) <- commands, prefixMatch cmd s ] of
- [] -> io $ hPutStr stdout ("unknown command `:" ++ cmd ++ "'\n"
- ++ shortHelpText)
+ [] -> io (hPutStr stdout ("unknown command `:" ++ cmd ++ "'\n"
+ ++ shortHelpText) >> return False)
[(_,f)] -> f (dropWhile isSpace rest)
- cs -> io $ hPutStrLn stdout ("prefix " ++ cmd ++
- " matches multiple commands (" ++
+ cs -> io (hPutStrLn stdout ("prefix " ++ cmd ++
+ " matches multiple commands (" ++
foldr1 (\a b -> a ++ ',':b) (map fst cs)
- ++ ")")
+ ++ ")") >> return False)
noArgs c = io (hPutStrLn stdout ("command `:" ++ c ++ "' takes no arguments"))
setGHCiState st{current_module = mkModuleName m}
changeDirectory :: String -> GHCi ()
-changeDirectory = io . setCurrentDirectory
+changeDirectory d = io (setCurrentDirectory d)
loadModule :: String -> GHCi ()
-loadModule path = do
+loadModule path = timeIt (loadModule' path)
+
+loadModule' path = do
state <- getGHCiState
cmstate1 <- io (cmUnload (cmstate state))
(cmstate2, ok, mods) <- io (cmLoadModule cmstate1 path)
- let new_state = GHCiState {
+ let new_state = state{
cmstate = cmstate2,
modules = mods,
current_module = case mods of
[] -> defaultCurrentModule
- xs -> last xs,
+ xs -> head xs,
target = Just path
}
setGHCiState new_state
case target state of
Nothing -> io (putStr "no current target\n")
Just path
- -> do (new_cmstate, ok, mod) <- io (cmLoadModule (cmstate state) path)
- setGHCiState state{cmstate=new_cmstate}
+ -> do (new_cmstate, ok, mods) <- io (cmLoadModule (cmstate state) path)
+ setGHCiState
+ state{cmstate=new_cmstate,
+ modules = mods,
+ current_module = case mods of
+ [] -> defaultCurrentModule
+ xs -> head xs
+ }
+
+
reloadModule _ = noArgs ":reload"
+typeOfExpr :: String -> GHCi ()
+typeOfExpr str
+ = do st <- getGHCiState
+ dflags <- io (getDynFlags)
+ (new_cmstate, maybe_ty) <- io (cmGetExpr (cmstate st) dflags
+ (current_module st) str False)
+ setGHCiState st{cmstate = new_cmstate}
+ case maybe_ty of
+ Nothing -> return ()
+ Just (_, unqual, ty) -> io (printForUser stdout unqual (ppr ty))
+
+quit :: String -> GHCi Bool
+quit _ = return True
+
+shellEscape :: String -> GHCi Bool
+shellEscape str = io (system str >> return False)
+
+----------------------------------------------------------------------------
+-- Code for `:set'
+
-- set options in the interpreter. Syntax is exactly the same as the
-- ghc command line, except that certain options aren't available (-C,
-- -E etc.)
--
-- This is pretty fragile: most options won't work as expected. ToDo:
-- figure out which ones & disallow them.
+
setOptions :: String -> GHCi ()
-setOptions str =
- io (do leftovers <- processArgs static_flags (words str) []
- dyn_flags <- readIORef v_InitDynFlags
- writeIORef v_DynFlags dyn_flags
- leftovers <- processArgs dynamic_flags leftovers []
- dyn_flags <- readIORef v_DynFlags
- writeIORef v_InitDynFlags dyn_flags
- if (not (null leftovers))
- then throwDyn (OtherError ("unrecognised flags: " ++
+setOptions ""
+ = do st <- getGHCiState
+ let opts = options st
+ io $ putStrLn (showSDoc (
+ text "options currently set: " <>
+ if null opts
+ then text "none."
+ else hsep (map (\o -> char '+' <> text (optToStr o)) opts)
+ ))
+setOptions str
+ = do -- first, deal with the GHCi opts (+s, +t, etc.)
+ let opts = words str
+ (minus_opts, rest1) = partition isMinus opts
+ (plus_opts, rest2) = partition isPlus rest1
+
+ if (not (null rest2))
+ then io (putStrLn ("unknown option: `" ++ head rest2 ++ "'"))
+ else do
+
+ mapM setOpt plus_opts
+
+ -- now, the GHC flags
+ io (do leftovers <- processArgs static_flags minus_opts []
+ dyn_flags <- readIORef v_InitDynFlags
+ writeIORef v_DynFlags dyn_flags
+ leftovers <- processArgs dynamic_flags leftovers []
+ dyn_flags <- readIORef v_DynFlags
+ writeIORef v_InitDynFlags dyn_flags
+ if (not (null leftovers))
+ then throwDyn (OtherError ("unrecognised flags: " ++
unwords leftovers))
- else return ()
- )
+ else return ()
+ )
-typeOfExpr :: String -> GHCi ()
-typeOfExpr str
- = do st <- getGHCiState
- dflags <- io (getDynFlags)
- (st, maybe_ty) <- io (cmTypeExpr (cmstate st) dflags
- (current_module st) str)
- case maybe_ty of
- Nothing -> return ()
- Just (unqual, ty) -> io (printForUser stdout unqual (ppr ty))
+unsetOptions :: String -> GHCi ()
+unsetOptions str
+ = do -- first, deal with the GHCi opts (+s, +t, etc.)
+ let opts = words str
+ (minus_opts, rest1) = partition isMinus opts
+ (plus_opts, rest2) = partition isPlus rest1
+
+ if (not (null rest2))
+ then io (putStrLn ("unknown option: `" ++ head rest2 ++ "'"))
+ else do
+
+ mapM unsetOpt plus_opts
+
+ -- can't do GHC flags for now
+ if (not (null minus_opts))
+ then throwDyn (OtherError "can't unset GHC command-line flags")
+ else return ()
+
+isMinus ('-':s) = True
+isMinus _ = False
+
+isPlus ('+':s) = True
+isPlus _ = False
-quit :: String -> GHCi ()
-quit _ = exitGHCi
+setOpt ('+':str)
+ = case strToGHCiOpt str of
+ Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Just o -> setOption o
+
+unsetOpt ('+':str)
+ = case strToGHCiOpt str of
+ Nothing -> io (putStrLn ("unknown option: `" ++ str ++ "'"))
+ Just o -> unsetOption o
+
+strToGHCiOpt :: String -> (Maybe GHCiOption)
+strToGHCiOpt "s" = Just ShowTiming
+strToGHCiOpt "t" = Just ShowType
+strToGHCiOpt _ = Nothing
+
+optToStr :: GHCiOption -> String
+optToStr ShowTiming = "s"
+optToStr ShowType = "t"
+
+
+-----------------------------------------------------------------------------
+-- Code to do last-expression-entered stuff. (a.k.a the $$ facility)
+
+-- Take a string and replace $$s in it with the last expr, if any.
+expandExpr :: String -> GHCi String
+expandExpr str
+ = do mle <- getLastExpr
+ return (outside mle str)
+ where
+ outside mle ('$':'$':cs)
+ = case mle of
+ Just le -> " (" ++ le ++ ") " ++ outside mle cs
+ Nothing -> outside mle cs
+
+ outside mle [] = []
+ outside mle ('"':str) = '"' : inside2 mle str -- "
+ outside mle ('\'':str) = '\'' : inside1 mle str -- '
+ outside mle (c:cs) = c : outside mle cs
+
+ inside2 mle ('"':cs) = '"' : outside mle cs -- "
+ inside2 mle (c:cs) = c : inside2 mle cs
+ inside2 mle [] = []
+
+ inside1 mle ('\'':cs) = '\'': outside mle cs
+ inside1 mle (c:cs) = c : inside1 mle cs
+ inside1 mle [] = []
+
+
+rememberExpr :: String -> GHCi ()
+rememberExpr str
+ = do let cleaned = (clean . reverse . clean . reverse) str
+ let forget_me_not | null cleaned = Nothing
+ | otherwise = Just cleaned
+ setLastExpr forget_me_not
+ where
+ clean = dropWhile isSpace
-shellEscape :: String -> GHCi ()
-shellEscape str = io (system str >> return ())
-----------------------------------------------------------------------------
-- GHCi monad
modules :: [ModuleName],
current_module :: ModuleName,
target :: Maybe FilePath,
- cmstate :: CmState
+ cmstate :: CmState,
+ options :: [GHCiOption],
+ last_expr :: Maybe String
}
+data GHCiOption = ShowTiming | ShowType deriving Eq
+
defaultCurrentModule = mkModuleName "Prelude"
newtype GHCi a = GHCi { unGHCi :: GHCiState -> IO (GHCiState, a) }
getGHCiState = GHCi $ \s -> return (s,s)
setGHCiState s = GHCi $ \_ -> return (s,())
+isOptionSet :: GHCiOption -> GHCi Bool
+isOptionSet opt
+ = do st <- getGHCiState
+ return (opt `elem` options st)
+
+setOption :: GHCiOption -> GHCi ()
+setOption opt
+ = do st <- getGHCiState
+ setGHCiState (st{ options = opt : filter (/= opt) (options st) })
+
+unsetOption :: GHCiOption -> GHCi ()
+unsetOption opt
+ = do st <- getGHCiState
+ setGHCiState (st{ options = filter (/= opt) (options st) })
+
+getLastExpr :: GHCi (Maybe String)
+getLastExpr
+ = do st <- getGHCiState ; return (last_expr st)
+
+setLastExpr :: Maybe String -> GHCi ()
+setLastExpr last_expr
+ = do st <- getGHCiState ; setGHCiState (st{last_expr = last_expr})
+
io m = GHCi $ \s -> m >>= \a -> return (s,a)
ghciHandle h (GHCi m) = GHCi $ \s ->
let path = d ++ '/':obj
b <- doesFileExist path
if b then return path else findFile ds obj
+
+-----------------------------------------------------------------------------
+-- timing & statistics
+
+timeIt :: GHCi a -> GHCi a
+timeIt action
+ = do b <- isOptionSet ShowTiming
+ if not b
+ then action
+ else do allocs1 <- io $ getAllocations
+ time1 <- io $ getCPUTime
+ a <- action
+ allocs2 <- io $ getAllocations
+ time2 <- io $ getCPUTime
+ io $ printTimes (allocs2 - allocs1) (time2 - time1)
+ return a
+
+foreign import "getAllocations" getAllocations :: IO Int
+
+printTimes :: Int -> 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")))
projects / ghc-hetmet.git / blobdiff