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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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    Jon Pretty‏ @propensive 4 Apr 2017

    Jon Pretty Retweeted Dale Wijnand

    Yep, the existentials are the expanded form of @tpolecat's projections. And yeah, there's no reasonable way of merging invariant members...https://twitter.com/dwijnand/status/849217180000559105 …

    Jon Pretty added,

    Dale Wijnand @dwijnand
    Replying to @dwijnand @propensive and 2 others
    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 symmetry pic.twitter.com/oumpLUzyeD
    4:27 AM - 4 Apr 2017
    1 reply 0 retweets 0 likes
      1. New conversation
      1. Dale Wijnand‏ @dwijnand 4 Apr 2017
        Replying to @propensive @tpolecat

        Also looks like `(A with B)#M` isn't equivalent to `x.M forSome { val x: A with B }`:pic.twitter.com/UQDHfsqf1v

        2 replies 0 retweets 0 likes
      2. Jon Pretty‏ @propensive 4 Apr 2017
        Replying to @dwijnand @tpolecat

        That looks even more surprising. The difference is meant to be syntactical. Are your two `=:=` instances ambiguous, perchance?

        1 reply 0 retweets 0 likes
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