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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 22 Nov 2013

      I'm discovering Scala is more kindsafe than I'd previously realised; unfortunately, I think I want dynamic kinding right now.

      1 reply 0 retweets 0 likes
    2.  🔴 Lars Hupel‏ @larsr_h 22 Nov 2013
      Replying to @propensive

      @propensive Uh. I'm not even sure I know what "dynamic kinding" is supposed to mean :-)

      1 reply 0 retweets 0 likes
    3. Jon Pretty‏ @propensive 22 Nov 2013
      Replying to @larsr_h

      @larsr_h I *want* it to mean a way to avoid the kind error I'm getting (which seems to relate only to a covariance annotation)...

      1 reply 0 retweets 0 likes
    4.  🔴 Lars Hupel‏ @larsr_h 22 Nov 2013
      Replying to @propensive

      @propensive Beware, for there are soundness problems ahead.

      2 replies 0 retweets 0 likes
    5.  🔴 Lars Hupel‏ @larsr_h 22 Nov 2013
      Replying to @larsr_h

      @propensive … to be a little bit more clear: When abstracting over type constructors with variance annotations, scalac is sometimes unsound.

      2 replies 0 retweets 0 likes
    6. Jon Pretty‏ @propensive 22 Nov 2013
      Replying to @larsr_h

      @larsr_h I'm converting from a type member to a type parameter (hence the type lambas), so what I want to do *ought* to work...

      1 reply 0 retweets 0 likes
    7.  🔴 Lars Hupel‏ @larsr_h 22 Nov 2013
      Replying to @propensive

      @propensive Any chance to see some code? :-)

      2 replies 0 retweets 0 likes
    8. Jon Pretty‏ @propensive 22 Nov 2013
      Replying to @larsr_h

      @larsr_h You can see it before I started the mangling: https://github.com/propensive/rapture-io/blob/master/src/exceptions.scala …

      2 replies 0 retweets 0 likes
      Jon Pretty‏ @propensive 22 Nov 2013

      @larsr_h Actually, that link is wrong! Copy/paste works so badly over an air-gap! s/rapture-io/rapture-core/

      5:55 AM - 22 Nov 2013
      • 1 Like
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      0 replies 0 retweets 1 like

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