On Tue, Oct 6, 2015 at 3:02 PM, Malcolm Wallace <malcolm.wall...@me.com> wrote:
> > On 6 Oct 2015, at 17:47, Herbert Valerio Riedel wrote: > > At the risk of stating the obvious: I don't think it matters from which > > group a given argument comes from as its validity doesn't depend on the > > messenger. > > In that case, I think you are misunderstanding the relevance of Johan's > argument here. Let me try to phrase it differently. Some people who can > reasonably claim to have experience with million-line plus codebases are > warning that this change is too disruptive, and makes maintenance harder > than it ought to be. On the other hand, of the people who say the change > is not really disruptive, none of them have (yet?) made claims to have > experience of the maintenance of extremely large-scale codebases. Very well. Let me offer a view from the "other side of the fence." I personally maintain about 1.3 million lines of Haskell, and over 120 packages on hackage. It took me less than a half a day to get everything running with 7.10, and about two days to build -Wall clean. In that first day I actually had to spend vastly more time fixing things related to changes in Typeable, template-haskell and a tweaked corner case in the typechecker than anything AMP/FTP related. In the end I had to add two type signatures. Most of the patches to go -Wall clean looked like +#if __GLASGOW_HASKELL__ < 710 import Control.Applicative import Data.Monoid +#endif Maybe 10% were more complicated. -Edward
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