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

David Roundy droundy at darcs.net
Wed Sep 6 14:08:05 EDT 2006

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.  It's ugly, but beats any
other choice I'm aware of.  I wish that built in functions that call
error could be automatically this way...
David Roundy

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