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raphlinus's profile
Raph Levien
Raph Levien
Raph Levien
@raphlinus

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Raph Levien

@raphlinus

Rust. Fonts. Graphics. Quaker. Independent. he/him

Berkeley, CA
levien.com
Joined May 2009

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    1. qualia are a fuck‏ @__anp__ 6 Nov 2019
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      Replying to @raphlinus @jckarter and

      indeed! i've been making progress on implementing https://github.com/rust-lang/rust/issues/47809 …, which i'm fairly confident will let me eliminate the macros from topo. down to a couple of llvm errors and i should be able to prototype it.

      1 reply 0 retweets 1 like
    2. qualia are a fuck‏ @__anp__ 6 Nov 2019
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      Replying to @__anp__ @raphlinus and

      even with that, the main win of the compiler plugin iiuc is static typing for the implicitly propagated composer type, so you can e.g. determine whether you're in an android or skia context and fail compile if you emit the wrong nodes

      2 replies 0 retweets 0 likes
    3. Raph Levien‏ @raphlinus 6 Nov 2019
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      Replying to @__anp__ @jckarter and

      Doesn't it also transform plain struct.field access into a subscribe to an observable object? That seems to me one of the main magics people now expect from declarative UI.

      1 reply 0 retweets 0 likes
    4. qualia are a fuck‏ @__anp__ 6 Nov 2019
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      Replying to @raphlinus @jckarter and

      ah i'm out of date, they used to have a sigil for that

      1 reply 0 retweets 0 likes
    5. qualia are a fuck‏ @__anp__ 6 Nov 2019
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      Replying to @__anp__ @raphlinus and

      and yeah magic field access seems unlikely to come to rust...ever? :(

      1 reply 0 retweets 0 likes
    6. Raph Levien‏ @raphlinus 6 Nov 2019
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      Replying to @__anp__ @jckarter and

      I'm not convinced it should. In druid it's plain old field access within closures etc, but then it's lenses at composition boundaries. I think there's a good argument this is the Right Way in Rust, and doesn't require lang magic.

      1 reply 0 retweets 1 like
    7. qualia are a fuck‏ @__anp__ 6 Nov 2019
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      Replying to @raphlinus @jckarter and

      yeah i think it would wreck rust, fwiw. for moxie's state keys, you could implement special binding behavior on Deref? but as it is the whole runtime is woken up on state changes and memoization equality checks are how i avoid excessive work, no need to bind on reads

      1 reply 0 retweets 0 likes
    8. qualia are a fuck‏ @__anp__ 6 Nov 2019
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      Replying to @__anp__ @raphlinus and

      or rather, the state variable is bound-on-acquisition, and its assumed that functions you call will be re-run as needed if they receive some sub-field of that value

      1 reply 0 retweets 0 likes
    9. Leland Richardson‏ @intelligibabble 6 Nov 2019
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      Replying to @__anp__ @raphlinus and

      There's a high bar to reach for compiler level plugin. It was/is a gamble, but makes sense for us I think. Once you have it, lots of potential to improve ergonomics though.

      1 reply 0 retweets 1 like
    10. Leland Richardson‏ @intelligibabble 6 Nov 2019
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      Replying to @intelligibabble @raphlinus and

      I'm not certain that the implicit observation of @Model was the right call or not, but it does have a lot of advantages. That said, yeah - might not make sense in the context of rust. Swift UI made similar judgement calls i suppose.

      4 replies 0 retweets 1 like
      Raph Levien‏ @raphlinus 6 Nov 2019
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      Replying to @intelligibabble @jckarter and

      Rust makes things interesting in lots of ways. Thing is, we can evolve the language if need be, but I think we need a *really* good story of what that should be and why we need it. I personally don't feel like I understand the domain well enough yet. JC is inspiration here.

      5:37 PM - 6 Nov 2019
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        2. Leland Richardson‏ @intelligibabble 6 Nov 2019
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          Replying to @raphlinus @jckarter and

          Yeah. I am trying to look at JC through the lens of "what is specific to Android + UI, and what can be more general as a language feature". What is exciting is that as time has gone on we have been able to simplify what @Composable actually means to us more and more

          1 reply 0 retweets 1 like
        3. Leland Richardson‏ @intelligibabble 6 Nov 2019
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          Replying to @intelligibabble @raphlinus and

          The best parallel IMO is with async/await. Several languages have now adopted this type of feature. I *think* as we iterate on things, it will become more clear what a composable function is / what it's useful for, and we can formalize it.

          1 reply 0 retweets 1 like
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