[Haskell-beginners] Re: A better way?

Daniel Fischer wrote:

...

I'd use bang patterns in favor of the now outdated

| x `seq` False = undefined

pattern though.

I would, too, but they're not yet portable, are they? Which implementations other than GHC currently support them?

No, they're not portable yet, but they're really convenient. :D The implementations other than GHC will probably pick up -XBangPatterns as well. Regards, apfelmus -- http://apfelmus.nfshost.com