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sgrif's profile
Miss Dada 🏳️‍⚧️
Miss Dada 🏳️‍⚧️
Miss Dada  🏳️‍⚧️
@sgrif

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Miss Dada  🏳️‍⚧️

@sgrif

Co lead of the http://crates.io  team. Creator of @dieselframework. Former host of @_bikeshed and @_yakshave. Former Rails comitter. Enby. they/them

Albuquerque, NM
patreon.com/seantheprogram…
Joined November 2008

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    1. Esteban K –  🦀 ⚙️@home‏ @ekuber Jan 26
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      Lazy @rustlang Twitter: can you send me snippets of code where you *needed* higher kinded lifetimes? I wish to identify as many cases as possible to categorize them and make rustc understand them and guide you in their direction.

      11 replies 21 retweets 61 likes
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    2. Esteban K –  🦀 ⚙️@home‏ @ekuber Jan 26
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      Even better if you can also show me the road you took to reach the understanding that HKLT 1) were a thing and 2) you needed to use them.

      4 replies 1 retweet 9 likes
      Show this thread
    3. Miss Dada  🏳️‍⚧️‏ @sgrif Jan 27
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      Replying to @ekuber

      Do cases where I ended up not being able to do the thing I need because projection through HRTB is broken count?

      1 reply 0 retweets 1 like
    4. Esteban K –  🦀 ⚙️@home‏ @ekuber Jan 27
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      Replying to @sgrif

      That is as important as valid cases, if not more so. Avoiding misleading suggestions is necessary.

      1 reply 0 retweets 0 likes
    5. Miss Dada  🏳️‍⚧️‏ @sgrif Jan 27
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      Replying to @ekuber

      https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=e9d09e0a05f54cf1487934561a6cc0c8 …

      1 reply 0 retweets 1 like
    6. Esteban K –  🦀 ⚙️@home‏ @ekuber Jan 27
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      Replying to @sgrif

      It seems to me that both those cases should indeed try to steer people to HRTB.

      1 reply 0 retweets 1 like
    7. Miss Dada  🏳️‍⚧️‏ @sgrif Jan 27
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      Replying to @ekuber

      If it wasn't broken yes. But the problem is we can't even actually easily write what we need, which is bounds on an associated type *in* the HRTB (which we can't even name because function traits will never be stable I guess)

      1 reply 0 retweets 0 likes
      Miss Dada  🏳️‍⚧️‏ @sgrif Jan 27
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      Replying to @sgrif @ekuber

      e.g. what I really want here is something like: for<'a> { F: FnOnce<(&'a mut self)>, F::Output: Future<Output = Result<T, E>>, } but there's no way to write that without saying `F::Output` is the same for all lifetimes

      4:00 PM - 27 Jan 2020
      1 reply 0 retweets 0 likes
        1. Miss Dada  🏳️‍⚧️‏ @sgrif Jan 27
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          Replying to @sgrif @ekuber

          But even if that existed it wouldn't help here since folks arbitrarily decided that we should only ever have the arrow syntax for fn traits because who needs projection I guess ¯\_(ツ)_/¯

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