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GHC
| Problem
|
Solution
|
Examples
|
| compile a file, but don't link
|
-c
|
ghc -c Foo.hs
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GHCi
| Problem
|
Solution
|
Examples
|
| checking definitions
|
:i
|
Prelude> :i Monad
class Monad m where
(>>=) :: m a -> (a -> m b) -> m b
(>>) :: m a -> m b -> m b
return :: a -> m a
fail :: String -> m a
-- Defined in GHC.Base
instance Monad Maybe -- Defined in Data.Maybe
instance Monad IO -- Defined in GHC.IOBase
instance Monad ((->) r) -- Defined in Control.Monad.Instances
instance Monad [] -- Defined in GHC.Base
|
| checking types
|
:t
|
Prelude> :t "Hello"
"Hello" :: [Char]
Prelude> :t length
length :: [a] -> Int
|
Hugs
TODO