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407: async: switch to async-fn-in-traits, release v0.2.0-alpha.0 r=eldruin a=Dirbaio Latest Rust nightlies have somewhat usable async-fn-in-trait support already! 🎉 embassy-nrf updated here embassy-rs/embassy#974 Paprecuts encountered: - there's this annoying error [playground](https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=f04fca1f2a3d643c323fb49c05bd3ed3), workaround is to use the concrete type instead of `Self::Error`. This is a limitation of all `async fn`s, not just in traits, but it hits especially hard within traits, so I dunno if there's plans to improve it. > `async fn` return type cannot contain a projection or `Self` that references lifetimes from a parent scope - The SpiDevice trait ICEs, issue filed rust-lang/rust#102310 - default methods don't work, but there's a PR already rust-lang/rust#102308 Due to the last 2 I've left `SpiDevice` alone for now. Co-authored-by: Dario Nieuwenhuis <dirbaio@dirbaio.net>
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`extern crate alloc` was added accidentally breaking downstream `no_std`
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Requires rust-embedded/embedded-hal#407
Requires rust-embedded-community/embedded-nal#78