[Haskell-cafe] Re: how do you debug programs?

[Jón Fairbairn]

David Roundy <droundy at darcs.net> writes:

> On Wed, Sep 06, 2006 at 09:56:17AM -0700, Jason Dagit wrote:
> > Or maybe even more extreme you could use template haskell or the c
> > preprocessor to fill in the line number + column.
> 
> Which is precisely what darcs does for fromJust (which we use a lot):
> we define a C preprocessor macro fromJust. 

Curiously, the only bug in darcs that has bitten me so far
was a use of fromJust.  Perhaps that indicates a weakness in
the style, rather than the tools?

-- 
Jón Fairbairn                                 Jon.Fairbairn at cl.cam.ac.uk