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propensive's profile
Jon Pretty
Jon Pretty
Jon Pretty
@propensive

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Jon Pretty

@propensive

Supporting Scala through professional training and open-source software. Responsible for Magnolia, Fury, Scala World and Functional Africa.

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propensive.com
Joined July 2010

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    1. P. Oscar Boykin‏ @posco 30 Sep 2016

      P. Oscar Boykin Retweeted typelevel.scala

      This problem with scala typeclasses really feels to me like we need to be looking at language level solutions.https://twitter.com/typelevel/status/781877858901819392 …

      P. Oscar Boykin added,

      typelevel.scala @typelevel
      New post: @adelbertchang about the implementation of type classes hierarchies with subtyping http://typelevel.org/blog/2016/09/30/subtype-typeclasses.html …
      4 replies 6 retweets 21 likes
    2. Jon Pretty‏ @propensive 1 Oct 2016
      Replying to @posco

      I'm not sure: I think that'd either lose some useful functionality of implicits, or be the same with slightly different tradeoffs...

      2 replies 0 retweets 0 likes
    3. P. Oscar Boykin‏ @posco 1 Oct 2016
      Replying to @propensive

      I don't mean get rid of implicit in scala, just add an explicit typeclass mechanism.

      3 replies 0 retweets 0 likes
    4. Jon Pretty‏ @propensive 1 Oct 2016
      Replying to @posco

      Syntactic sugar for common cases might work for me, as with implicit classes for ext methods. Is that roughly what you were thinking?

      1 reply 0 retweets 1 like
    5. Jon Pretty‏ @propensive 1 Oct 2016
      Replying to @propensive @posco

      e.g. making something like Simulacrum first-class in Scala.

      1 reply 0 retweets 2 likes
    6. Raul Raja‏ @raulraja 1 Oct 2016
      Replying to @propensive @posco

      I'd love to have global vs value based instances options and good compiler error reporting for missing instances.

      1 reply 0 retweets 3 likes
    7. P. Oscar Boykin‏ @posco 1 Oct 2016
      Replying to @raulraja @propensive

      yes, either global uniqueness or some simplified resolution rules for typeclasses that could sidestep the problems.

      2 replies 0 retweets 1 like
      Jon Pretty‏ @propensive 1 Oct 2016
      Replying to @posco @raulraja

      Yep, it's currently too hard for most people... not sure we can improve simple cases without complicating others, though.

      10:27 AM - 1 Oct 2016
      • 1 Like
      • Raul Raja
      0 replies 0 retweets 1 like

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