multiline commands in GHCi #4316

[ghc-hetmet.git] / ghc / GhciMonad.hs

diff --git a/ghc/GhciMonad.hs b/ghc/GhciMonad.hs
index 82f2aa7..779fad2 100644 (file)
--- a/ghc/GhciMonad.hs
+++ b/ghc/GhciMonad.hs
@@ -77,7 +77,8 @@ data GHCiState = GHCiState
         ghc_e :: Bool -- True if this is 'ghc -e' (or runghc)
      }
 
-data CtxtCmd
+data CtxtCmd   -- In each case, the first [String] are the starred modules
+               -- and the second are the unstarred ones
   = SetContext [String] [String]
   | AddModules [String] [String]
   | RemModules [String] [String]
@@ -89,6 +90,7 @@ data GHCiOption
        = ShowTiming            -- show time/allocs after evaluation
        | ShowType              -- show the type of expressions
        | RevertCAFs            -- revert CAFs after every evaluation
+        | Multiline             -- use multiline commands
        deriving Eq
 
 data BreakLocation
@@ -191,7 +193,7 @@ instance ExceptionMonad GHCi where
                                 unGHCi (f g_restore) s
 
 instance MonadIO GHCi where
-  liftIO = io
+  liftIO = MonadUtils.liftIO
 
 instance Haskeline.MonadException GHCi where
   catch = gcatch
@@ -233,9 +235,6 @@ unsetOption opt
  = do st <- getGHCiState
       setGHCiState (st{ options = filter (/= opt) (options st) })
 
-io :: IO a -> GHCi a
-io = MonadUtils.liftIO
-
 printForUser :: GhcMonad m => SDoc -> m ()
 printForUser doc = do
   unqual <- GHC.getPrintUnqual
@@ -244,7 +243,7 @@ printForUser doc = do
 printForUserPartWay :: SDoc -> GHCi ()
 printForUserPartWay doc = do
   unqual <- GHC.getPrintUnqual
-  io $ Outputable.printForUserPartWay stdout opt_PprUserLength unqual doc
+  liftIO $ Outputable.printForUserPartWay stdout opt_PprUserLength unqual doc
 
 runStmt :: String -> GHC.SingleStep -> GHCi GHC.RunResult
 runStmt expr step = do
@@ -299,9 +298,9 @@ printTimes allocs psecs
        
 revertCAFs :: GHCi ()
 revertCAFs = do
-  io $ rts_revertCAFs
+  liftIO rts_revertCAFs
   s <- getGHCiState
-  when (not (ghc_e s)) $ io turnOffBuffering
+  when (not (ghc_e s)) $ liftIO turnOffBuffering
        -- Have to turn off buffering again, because we just 
        -- reverted stdout, stderr & stdin to their defaults.
 
@@ -350,8 +349,8 @@ initInterpBuffering = do -- make sure these are linked
 
 flushInterpBuffers :: GHCi ()
 flushInterpBuffers
- = io $ do getHandle stdout_ptr >>= hFlush
-           getHandle stderr_ptr >>= hFlush
+ = liftIO $ do getHandle stdout_ptr >>= hFlush
+               getHandle stderr_ptr >>= hFlush
 
 turnOffBuffering :: IO ()
 turnOffBuffering