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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. Jon Pretty‏ @propensive 4 Apr 2017

      I was told last night that type `A with B` != `B with A` even though each subtypes t'other. I'm not convinced. Can anyone explain it to me?

      3 replies 0 retweets 4 likes
    2. Jon Pretty‏ @propensive 4 Apr 2017

      By what aspect of *type* theory breaks if we assume `A with B` == `B with A`? I might be asking the wrong question, here...

      1 reply 0 retweets 0 likes
    3. Dale Wijnand‏ @dwijnand 4 Apr 2017
      Replying to @propensive @fommil

      If only I could search scala-internals for <:< or =:= ........

      1 reply 0 retweets 0 likes
    4. Jon Pretty‏ @propensive 4 Apr 2017
      Replying to @dwijnand @fommil

      You could narrow it down by filtering on @contrarivariant...

      1 reply 0 retweets 1 like
    5. Dale Wijnand‏ @dwijnand 4 Apr 2017
      Replying to @propensive @fommil @contrarivariant

      apparently there are 650 topics by Paul in scale-internals..

      1 reply 0 retweets 1 like
    6. Dale Wijnand‏ @dwijnand 4 Apr 2017
      Replying to @dwijnand @propensive and

      https://groups.google.com/d/msg/scala-language/vH_g2aAM62Q/iYqs_ARHgOsJ … (via https://groups.google.com/d/topic/scala-internals/qAICKMOa_f0 …) keywords: isSubType type-equivalence symmetrypic.twitter.com/oumpLUzyeD

      1 reply 0 retweets 2 likes
      Jon Pretty‏ @propensive 4 Apr 2017
      Replying to @dwijnand @fommil @contrarivariant

      Thanks for the digging!

      4:28 AM - 4 Apr 2017
      • 1 Like
      • Dale Wijnand
      0 replies 0 retweets 1 like

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