29 Jun
2010
29 Jun
'10
6:48 a.m.
Hello Prad The info command will give you details of a function - its type signature and the module where it is defined, its fixity if it is an infix function: Prelude> :info length length :: [a] -> Int -- Defined in GHC.List The shorthand is :i Prelude> :i (>>=) class Monad m where (>>=) :: m a -> (a -> m b) -> m b ... -- Defined in GHC.Base infixl 1 >>= For constructors, info will tell you which data type the constructor belongs to and the module where it is defined: Prelude> :i Just data Maybe a = ... | Just a -- Defined in Data.Maybe There is no mechanism like docstring in Haskell though - the information displayed by the info command is not customizable. Best wishes Stephen