RE: [Haskell-cafe] Information given by :info (Was: Some randomnewbie questions)

On 10 January 2005 10:26, Sebastian Sylvan wrote:

On Mon, 10 Jan 2005 10:30:46 +0100 (MEZ), Henning Thielemann wrote:

...

What I also would like to see is the Haddock documentation string of a function printed by ":info" or some other command.

Now _that_ would be truly useful.

It's not perfect, but it's better than nothing: :def doc (\s -> let (rvar,rmod) = break (=='.') (reverse s); var = reverse rvar in System.Cmd.system ("mozilla http://www.haskell.org/ghc/docs/latest/html/libraries/base/" ++ reverse rmod ++ "html#" ++ (if (Data.Char.isUpper (head var)) then "t:" else "v:") ++ var) >> return "") eg. Prelude> :doc Prelude.head You have to use a qualified name, it only works in package base, and you can't look up data constructors. Any hackers out there want to try lifting these restrictions? Cheers, Simon