[Haskell-cafe] The amount of CPP we have to use is getting out of hand

[Andrey Chudnov]

Johan,
I hear and agree. Even though I've never used CPP in my packages, I've 
read code that does ---and it's horrible. And I, too, have experienced 
new GHC stable versions breaking foundational libraries, including 
Cabal. But, my impression was that most of these breakages are due to 
certain GHC extensions being deprecated, and not because the compiler 
stops respecting the standard. Is my understanding correct? If so, then 
why not disable extensions and limit yourself to Haskell 2010? Yes, you 
get used to the good stuff quickly, and it's painful to give it up --- 
but isn't that what standards are for?