On Tue, Oct 28, 2008 at 7:56 AM, Reiner Pope <[EMAIL PROTECTED]> wrote: > I've tried it out and it looks good so far. I had to fiddle with > haskell-src-ext's .cabal file to get it to install with GHC 6.10, > which is surprising since it isn't listed as a broken package... ah > well.
Care to tell me what the problem is? I have no problem installing it with GHC 6.10, in fact the 0.3.9 version on hackage was uploaded solely to have it compile with both old and new GHC. > Unfortunately, I've uncovered a problem in the parser. For instance, > with your module, [$hs|1+1*2|] evaluates to 4 rather than 3. This > seems to be a general problem with infix operators, which I believe > arises since haskell-src-exts isn't given the fixity declarations for > + and *, so it doesn't know to bind (*) tighter than (+). I don't see > how this problem can even be resolved without modifying Template > Haskell: given that the operators reside in user code, there is no way > to find their fixity. Yes, you're right, haskell-src(-exts) does not handle fixity of operators for you. You need to collect the fixities yourself and make a second pass over expressions to get them right. This is definitely functionality I would like to see available in haskell-src-exts (though not on by default), so if anyone were to implement it I would gladly accept patches. Cheers, /Niklas _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe