[Haskell-cafe] Haskell Debugging

[Pepe Iborra]

Hi Valentin

Please, take a look at the Haskell Wiki page for debugging.

http://haskell.org/haskellwiki/Debugging

You will find that thanks to Neil Mitchell there is a Windows version  
of Hat available. Perhaps you can add your experiences with it if it  
works for you.

pepe

On 13/11/2006, at 16:32, Valentin Gjorgjioski wrote:

> I'm pretty new in Haskell, few days since I started learning it. I  
> want to debu my programs. I'm currently using WinHugs, and I prefer  
> debugger for this.
>
> I tried googling and I found Hugs.Observer.
>
> I like it how it works, but still I have one BIG problem with it.  
> It doesn't work well with floats.
>
> Following example
>
> import Hugs.Observe
>
> ex8 :: [Float]
> ex8 = (observe "after reverse" ) reverse  [10.0,7.0,3.0,0.0,4.0]
>
> gives me
>
> >ex8
> [4.0,0.0,3.0,7.0,10.0]
>
> >>>>>>> Observations <<<<<<
>
> after reverse
>   { \ ($-990871 : $-990888 : $-990905 : $-990922 : $-990939 : [])  - 
> > $-990939 : $-990922 : $-990905 : $-990888 : $-990871 : []
>   }
>
> Which is not useful. After that I try to install
>
> http://www.haskell.org/hat/
>
> but for installing that I need hmake, and when I try to install  
> hmake, I typed first configure -prefix, and then, make.
>
> cd src/hmake;          make HC=ghc BUILDCOMP=ghc all config
> make[1]: Entering directory `/cygdrive/E/Haskell/hmake/src/hmake'
> Makefile:59: *** target pattern contains no `%'.  Stop.
> make[1]: Leaving directory `/cygdrive/E/Haskell/hmake/src/hmake'
> make: *** [targets/ix86-CYGWIN_NT-5.1/hmake-ghc] Error 2
>
> as you can see I'm using cygwin.
>
> I'm really stacked here, and I will kindly ask for help.
>
>
> Thanks,
> Valentin
>
>
> -- 
> Valentin Gjorgjioski
> Bachelor of Computer Science
> Department of Knowledge Technologies, Jozef Stefan Institute
> Jamova 39, SI-1000 Ljubljana, Slovenia
> Phone:	+386 1 477 3343
> Fax:	+386 1 477 3315
> Web:	http://kt.ijs.si/ValentinGjorgjioski/
> Email: 	Valentin.Gjorgjioski at ijs.si
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