class ??? with Haddock
wolfgang at jeltsch.net
Thu Jan 8 17:53:43 EST 2004
Am Donnerstag, 8. Januar 2004 17:39 schrieb Simon Marlow:
> > > $ ghc -E -cpp -D__HADDOCK__ Foo.hs -o Foo.raw-hs
> > This only replaces all __HADDOCK__ occurences with 1 but doesn't process
> > #ifdefs.
> Are you sure? It works for me, and it's what we use in GHC's libraries.
I found the problem, meanwhile. You have to put the #ifdefs etc. at the
beginning of the line. Uuh—terrible, I'd say. The same holds for cpp
-traditional. cpp without -traditional is more tolerant but treats
everything beginning with // as a comment and is therefore not usable with
Hugs when you need Data.Array.
Generally, I'd say that using a C preprocessor for Haskell is a bad idea but,
of course, I can imagine that it requires less work to make cpp usable for
Haskell than to develop a new preprocessor from scratch. But is using cpp
planned to be a long-term solution?
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