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wcrichton's profile
Will Crichton
Will Crichton
Will Crichton
@wcrichton

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Will Crichton

@wcrichton

Articulating the ineffable. Programming language theory 🤝 cognitive psychology. PhD @Stanford

he/him
willcrichton.net
Joined September 2011

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    1. Joe Cutler‏ @alpha_convert 3 Jan 2020

      Has anybody used webassembly as a compiler target for pet languages? I’m struggling with the text format- it’s a very strange mix of standard linear-format assembly and block structure.

      2 replies 0 retweets 1 like
      Show this thread
    2. Joe Cutler‏ @alpha_convert 3 Jan 2020

      @wcrichton did this come up in your PL class? Curious to see what others think

      1 reply 0 retweets 0 likes
      Show this thread
    3. Will Crichton‏ @wcrichton 3 Jan 2020
      Replying to @alpha_convert

      I had students write WASM directly, so different situation. My understanding is that as a compile target, you're expected to use language-specific bindings to WASM, similar to LLVM, e.g. https://github.com/WebAssembly/wasm-c-api/blob/master/include/wasm.h …

      2 replies 0 retweets 1 like
    4. Will Crichton‏ @wcrichton 3 Jan 2020
      Replying to @wcrichton @alpha_convert

      But I think the text format isn't too bad! It's weirdly forgiving, but I would just think about it as Lisp/S-expressions.

      1 reply 0 retweets 0 likes
    5. Joe Cutler‏ @alpha_convert 3 Jan 2020
      Replying to @wcrichton

      Hmm- the main problem is that it doesn't really work like s-exps because there's no sequencing operator- you simply write a \separated (c1 c2 c3 c4 ...) for a sequence of commands, interspersed with *structured* control blocks. I'd rather have it one way or the other, is all.

      1 reply 0 retweets 1 like
    6. Will Crichton‏ @wcrichton 3 Jan 2020
      Replying to @alpha_convert

      Perhaps you just need to write more imperative code ;-) or maybe it's helpful to see it as a direct encoding of the AST? See e.g. the OCaml datatype in the reference interpreter: https://github.com/WebAssembly/spec/blob/master/interpreter/syntax/ast.ml#L71 …

      1 reply 0 retweets 0 likes
    7. Joe Cutler‏ @alpha_convert 3 Jan 2020
      Replying to @wcrichton

      I'm writing the compiler in rust in an effort to write more imperative code ;-). And that is helpful. Thanks!

      1 reply 0 retweets 1 like
      Will Crichton‏ @wcrichton 3 Jan 2020
      Replying to @alpha_convert

      !!! you should use my abstract binding tree generator! https://github.com/willcrichton/rabbot … bob would be proud. It has many strictures, although few affordances (hasn't worked in a few years), but I'm sure that's fixable.

      8:14 PM - 3 Jan 2020
      • 1 Like
      • log4algernon
      1 reply 0 retweets 1 like
        1. Joe Cutler‏ @alpha_convert 3 Jan 2020
          Replying to @wcrichton

          haven't thought about ABTs in a while. Good thought though. If I do end up using them- I'll probably roll my own implementation. If I don't, I won't really understand them.

          0 replies 0 retweets 0 likes
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