On 08/22/2015 03:33 PM, Brandon Allbery wrote:
On Sat, Aug 22, 2015 at 6:23 AM, Johannes Waldmann < johannes.waldmann@htwk-leipzig.de> wrote:
I believe that (PatternSignatures and) ScopedTypeVariables should be on by default. It is currently off only to help those that are too lazy to write "forall t . " in (inner) declarations?
More because the language committee is ridiculously conservative. I think this is Public Enemy Number One as far as extensions that really ought to be part of the standard by now.
I can only second that. I seems to me that trying to have the default experience in GHC be some sort of Haskell2010 pseudo-standard is not useful[1]. I happen to believe that standards without more than one serious implementor are a terrible way to move things along. Let's *exploit* the fact that there is only one[2] really viable compiler at this precise moment in time, and move things forward more rapidly! [1] I believe there were some AMP things in base/Prelude which mean that GHC-by-default is not technically Haskell2010. [2] I realize that there's JHC, UHC, etc., but let's face it... unless those compilers implement most of the GHC extensions, then you're not going to get anything substantial (e.g. lens) to compile with those compilers. Regards,