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richhickey's profile
Rich Hickey
Rich Hickey
Rich Hickey
@richhickey

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Rich Hickey

@richhickey

clojure.org
Joined June 2009

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    1. John D. Hume‏ @duelinmarkers 27 May 2016
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      Is clojure.spec's use of "regular expression" idiosyncratic, or is there some prior use for something other than text matching?

      3 replies 0 retweets 0 likes
    2. Gary Fredericks‏ @gfredericks_ 27 May 2016
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      Replying to @duelinmarkers

      Definitely prior use for matching more abstract "things", but I've only seen things from a finite set, not predicates

      3 replies 0 retweets 0 likes
    3. John D. Hume‏ @duelinmarkers 27 May 2016
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      Replying to @gfredericks_

      What about for the expressions not being their own self-contained language? /cc @gfredericks_

      1 reply 0 retweets 0 likes
    4. Gary Fredericks‏ @gfredericks_ 27 May 2016
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      Replying to @duelinmarkers

      Are you referring to the fact that it's just a pile of clojure functions/macros? That's certainly been done before

      1 reply 0 retweets 0 likes
    5. John D. Hume‏ @duelinmarkers 27 May 2016
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      Replying to @gfredericks_

      the only regex composition I've found has been string concatenation. (In over 3 minutes of searching!)

      2 replies 0 retweets 0 likes
    6. Gary Fredericks‏ @gfredericks_ 27 May 2016
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      Replying to @duelinmarkers

      this stuff I wrote five years ago smells similar https://github.com/gfredericks/ranguages/blob/master/src/ranguages/core.clj …

      2 replies 0 retweets 1 like
    7. Gary Fredericks‏ @gfredericks_ 27 May 2016
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      Replying to @gfredericks_ @duelinmarkers

      I'll be surprised if @webyrd hasn't done something similar with minikanren

      1 reply 0 retweets 0 likes
    8. William Byrd‏ @webyrd 27 May 2016
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      Replying to @gfredericks_ @duelinmarkers

      Are you familiar with Parsing with Derivatives? http://matt.might.net/articles/parsing-with-derivatives/ … Based on Brzozowski's regex derivative

      1 reply 1 retweet 4 likes
    9. Gary Fredericks‏ @gfredericks_ 27 May 2016
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      Replying to @webyrd @duelinmarkers

      I remember first learning about regex derivatives and it was probably the best thing I heard that whole month

      1 reply 0 retweets 0 likes
    10. Jason Felice‏ @eraserhd 27 May 2016
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      Replying to @gfredericks_ @webyrd @duelinmarkers

      I find the VM approach much easier, even though derivatives are interesting. Been wondering rationale..

      2 replies 0 retweets 0 likes
      Rich Hickey‏ @richhickey 27 May 2016
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      Replying to @eraserhd @gfredericks_ and

      derivative pushes all branches in parallel, thus can give 'all failures' w/o (back)tracking

      10:16 AM - 27 May 2016
      • 1 Retweet
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      • Rafa Gómez Alex Miller Simon Belak Gary Fredericks
      1 reply 1 retweet 3 likes
        1. New conversation
        2. Cursive‏ @CursiveIDE 27 May 2016
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          Replying to @richhickey @eraserhd and

          VMs also parse all branches in lockstep, cf @cgrand's seqex. Linear lookahead too

          1 reply 0 retweets 2 likes
        3. Jason Felice‏ @eraserhd 27 May 2016
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          Replying to @CursiveIDE

          .@CursiveIDE @richhickey @gfredericks_ @webyrd @duelinmarkers @cgrand yup. Mine does. This makes it significantly simpler, surprisingly.

          1 reply 0 retweets 0 likes
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