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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. Li Haoyi‏ @li_haoyi 24 Jan 2015

      Why do case classes extend Product but not ProductN? Do we *want* people to be forced to use macros/codegen for every little thing? =(

      2 replies 0 retweets 2 likes
    2. Li Haoyi‏ @li_haoyi 24 Jan 2015
      Replying to @li_haoyi

      @li_haoyi I don't need anything fancy, just ProductN, an implicit Companion[T] with apply/unapply, and a Seq[String] of field names

      6 replies 0 retweets 4 likes
    3. Jon Pretty‏ @propensive 25 Jan 2015
      Replying to @li_haoyi

      @li_haoyi But you could provide your own (which could be a macro, of course).

      1 reply 0 retweets 0 likes
    4. Li Haoyi‏ @li_haoyi 25 Jan 2015
      Replying to @propensive

      @propensive It *needs* to be a macro, no "could" about it! There's no way of accessible the fields of a case class in a generic fashion.

      1 reply 0 retweets 0 likes
    5. Jon Pretty‏ @propensive 25 Jan 2015
      Replying to @li_haoyi

      @li_haoyi It's a different problem, but you could implement the type class with different arity overloads, maybe. Not sure you'd want to. ;)

      1 reply 0 retweets 0 likes
    6. Li Haoyi‏ @li_haoyi 25 Jan 2015
      Replying to @propensive

      @propensive No you can't. You *could* if they inherited from ProductN, but they don't. That's my whole complaint =P

      1 reply 0 retweets 0 likes
      Jon Pretty‏ @propensive 25 Jan 2015
      Replying to @li_haoyi

      @li_haoyi The idea is that `(a, b, c)` would desugar in the parser to `implicitly[Tupler].build(a, b, c)`.

      2:19 AM - 25 Jan 2015
      0 replies 0 retweets 0 likes

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