Re: [Haskell-cafe] Program used for debugging

But for internal expressions it can be quite hairy to figure out why what haskell thinks is the type of something and what I think dont match.

^^ Just give the internal expression a type you know to be wrong, then GHC will display the infered type and say it doesn't match the one you wrote. 2011/12/2 Rustom Mody

On Thu, Dec 1, 2011 at 7:40 PM, Yves Parès wrote:

...

Hey,

What do you mostly use for debugging? Simple calls to Debug.Trace.trace? Hpc? Hood?

I also wonder about 'type-debugging'

Using ghci: For a top level expression: - if it is not compiling I can put in (or remove) a type decl and see how things change. - if it is compiling I can of course ":t it"

But for internal expressions it can be quite hairy to figure out why what haskell thinks is the type of something and what I think dont match.

So is there something like type-intellisense for haskell where if one hovers the mouse (maybe over a selection) haskell tells what type it finds there?

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