-----------------------------------------------------------------------------
--- $Id: InteractiveUI.hs,v 1.14 2000/11/22 17:51:16 simonmar Exp $
+-- $Id: InteractiveUI.hs,v 1.15 2000/11/24 17:09:52 simonmar Exp $
--
-- GHC Interactive User Interface
--
import Readline
import IOExts
+import Numeric
+import List
import System
+import CPUTime
import Directory
import IO
import Char
("reload", reloadModule),
("set", setOptions),
("type", typeOfExpr),
+ ("unset", unsetOptions),
("quit", quit)
]
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 }
+ cmstate = cmstate',
+ options = [ShowTiming]}
return ()
uiLoop :: GHCi ()
doCommand c
doCommand (':' : command) = specialCommand command
-doCommand expr
+doCommand expr = timeIt (evalExpr expr)
+
+evalExpr expr
= do st <- getGHCiState
dflags <- io (getDynFlags)
- (new_cmstate, maybe_hvalue) <-
+ (new_cmstate, maybe_stuff) <-
io (cmGetExpr (cmstate st) dflags (current_module st) expr)
setGHCiState st{cmstate = new_cmstate}
- case maybe_hvalue of
+ case maybe_stuff of
Nothing -> return ()
- Just hv -> io (cmRunExpr hv)
+ Just (hv, unqual, ty)
+ -> do io (cmRunExpr hv)
+ b <- isOptionSet ShowType
+ if b then io (printForUser stdout unqual (text "::" <+> ppr ty))
+ else return ()
+
{-
let (mod,'.':str) = break (=='.') expr
case cmLookupSymbol (mkOrig varName (mkModuleName mod) (_PK_ str)) (cmstate st) of
changeDirectory = io . setCurrentDirectory
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
setGHCiState state{cmstate=new_cmstate}
reloadModule _ = noArgs ":reload"
--- 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: " ++
- unwords leftovers))
- else return ()
- )
-
typeOfExpr :: String -> GHCi ()
typeOfExpr str
= do st <- getGHCiState
dflags <- io (getDynFlags)
- (st, maybe_ty) <- io (cmTypeExpr (cmstate st) dflags
+ (st, maybe_ty) <- io (cmGetExpr (cmstate st) dflags
(current_module st) str)
case maybe_ty of
Nothing -> return ()
- Just (unqual, ty) -> io (printForUser stdout unqual (ppr ty))
+ Just (_, unqual, ty) -> io (printForUser stdout unqual (ppr ty))
quit :: String -> GHCi ()
quit _ = exitGHCi
shellEscape :: String -> GHCi ()
shellEscape str = io (system str >> return ())
+----------------------------------------------------------------------------
+-- 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 ""
+ = 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 ()
+ )
+
+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
+
+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"
+
-----------------------------------------------------------------------------
-- GHCi monad
modules :: [ModuleName],
current_module :: ModuleName,
target :: Maybe FilePath,
- cmstate :: CmState
+ cmstate :: CmState,
+ options :: [GHCiOption]
}
+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) })
+
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