Lookup module and package defining <<x>?

[Marc Weber]

> > $ghc-pkg --where-from ParseError
> > package parsec: defining modules: Text.ParserCombinators.Parsec.Error, Text.ParserCombinators.Parsec
> 
> Have you tried Hoogle?
> http://haskell.org/hoogle/
I know it. But I don't know yet which source it takes (haskell - source,
haddck html files, ...) ?

My purpose: After having found the a function I want to use it without
having to search where does it belong to and where does it come from.
I want it beeing as up to date as the installed libraries. That's why I
thought it might be best to integrate it into ghc?
 
I don't know wether you've ever prorgammed in Java using Eclipse?
After using a type you can press C-S-o to update all imports which will
give you the choice which one to use if there is more than one
opportunity. It would be nice to have this in haskell, too.

Do you think it would be better to integrate it in another tool such
like lambdabot or hoogle?

Marc