| Safe Haskell | Safe-Inferred |
|---|---|
| Language | Haskell98 |
IdeBackendRTS
- run :: RunBufferMode -> RunBufferMode -> IO a -> IO ()
- data RunBufferMode
- = RunNoBuffering
- | RunLineBuffering (Maybe Int)
- | RunBlockBuffering (Maybe Int) (Maybe Int)
- data Maybe a :: * -> *
Documentation
run :: RunBufferMode -> RunBufferMode -> IO a -> IO () Source
data RunBufferMode Source
Constructors
| RunNoBuffering | |
| RunLineBuffering (Maybe Int) | |
| RunBlockBuffering (Maybe Int) (Maybe Int) |
Instances
data Maybe a :: * -> *
The Maybe type encapsulates an optional value. A value of type
either contains a value of type Maybe aa (represented as ),
or it is empty (represented as Just aNothing). Using Maybe is a good way to
deal with errors or exceptional cases without resorting to drastic
measures such as error.
The Maybe type is also a monad. It is a simple kind of error
monad, where all errors are represented by Nothing. A richer
error monad can be built using the Either type.