Thanks for the suggestion Don,

I started the wiki page at http://haskell.org/haskellwiki/Debugging

On 06/09/06, Donald Bruce Stewart <[EMAIL PROTECTED]> wrote:
mnislaih:
> Hi Tamas
>
> There are several ways to debug a Haskell program.
>
> The most advanced ones are based in offline analysis of traces, I
> think Hat [1] is the most up-to-date tool for this. There is a Windows
> port of Hat at [5].
>
> Another approach is to simply use Debug.Trace. A more powerful
> alternative for this approach is Hood [2]. Even if it hasn't been
> updated in some time, Hood works perfectly with the current ghc
> distribution. Even more, Hugs has it already integrated [3]. You can
> simply import Observe and use observations directly in your program.
> For instance:
>
> import Observe
>
> f' = observe "f" f
> f a b = ....
>
> And then in hugs the expression:
> >f' 1 2
>
> would output what you want.
>
> Finally, the GHCi debugger project [4] aims to bring dynamic
> breakpoints and intermediate values observation to GHCi in a near
> future. Right now the tool is only available from the site as a
> modified version of GHC, so unfortunately you will have to compile it
> yourself if you want to try it.

Pepe, would you like to put up a page on the haskell.org wiki about
debugging in Haskell? You could use the above mail as a start :)

-- Don




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