hscurses-1.2: NCurses bindings for Haskell Source code Contents Index

HSCurses.MonadException

Documentation

class Monad m => MonadExc m where Source

Methods catchM :: m a -> (Exception -> m a) -> m a Source blockM :: m a -> m a Source unblockM :: m a -> m a Source Instances MonadExc IO MonadExc m => MonadExc (StateT s m)

class (MonadIO m, MonadExc m) => MonadExcIO m Source

Instances MonadExcIO IO (MonadExc m, MonadIO m) => MonadExcIO (StateT s m)

catchJustM Source

:: MonadExc m => Exception -> Maybe b Predicate to select exceptions -> m a Computation to run -> b -> m a Handler -> m a

handleM :: MonadExc m => (Exception -> m a) -> m a -> m a Source

handleJustM :: MonadExc m => (Exception -> Maybe b) -> (b -> m a) -> m a -> m a Source

tryM :: MonadExc m => m a -> m (Either Exception a) Source

tryJustM :: MonadExc m => (Exception -> Maybe b) -> m a -> m (Either b a) Source

catchDynM :: (MonadExc m, Typeable exc) => m a -> (exc -> m a) -> m a Source

bracketM Source

:: MonadExc m => m a computation to run first ("acquire resource") -> a -> m b computation to run last ("release resource") -> a -> m c computation to run in-between -> m c

bracketM_ :: MonadExc m => m a -> m b -> m c -> m c Source

finally Source

:: => IO a computation to run first -> IO b computation to run afterward (even if an exception was raised) -> IO a

modifyState :: MonadExc m => (s -> m (a, s)) -> StateT s m a Source

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