#ifdef considered harmful (was: DData)

Wolfgang Jeltsch wolfgang at jeltsch.net
Fri Apr 16 16:06:44 EDT 2004

Am Donnerstag, 15. April 2004 11:35 schrieb Robert Will:
> [...]

> I think what Haskellers (and others) can do in most cases is to factor out
> platform dependent parts to mini-modules which have different
> implementations but the same interface.  The version of such a module is
> choosen by the path it resides in during the build process.  (Simplest
> case: the -i option of the compiler.)  This also has the advantage, that
> the dependencies are made explicit, while preprocessing is a very implicit
> technique, e.g. you have to check type and even syntactic correctness of
> each possible version separately.

I think, this isn't a solution for the problem I originally spoke about, 
namely the inability of Haddock to handle deriving clauses fully.  Of course, 
the best solution here would be if Haddock would fully support deriving but I 
don't want to put pressure onto Simon Marlow ;-).

> [...]


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