Announcing Rust 1.85.0 and Rust 2024 | Rust Blog
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  • sugar_in_your_tea
    3·
    3 hours ago

    Adds Future and IntoFuture to the prelude.

    Woo!

    std::env::set_var, std::env::remove_var… are now unsafe functions.

    That’s unfortunate. I understand why it’s unsafe, but it would be cool if they were atomic or something instead. I don’t really want to clutter code with unsafe for things that are technically safe in context (e.g. unit tests for config parsing).

    async closures

    Baller.

    Other cool stuff as usual, so I’ll be updating soon. Congrats on the release!

    Edit: Looks like they messed with default lifetimes on impl Trait, but the fix was easy enough. The upgrade was otherwise smooth. Good work!

  • calcopiritus@lemmy.world
    2·
    1 day ago

    The const hash map is huge. It was always a pain the have const/static hash maps. Specially since most use cases don’t need a DoS-resistant hash map. Will be migrating to 2024 as soon as possible.

  • Rogue@feddit.uk
    13·
    3 days ago

    For anyone like me who hasn’t seen an edition change before, it’s just a mechanism for bundling breaking changes together and making them opt-in.

    We are excited to announce that the Rust 2024 Edition is now stable! Editions are a mechanism for opt-in changes that may otherwise pose a backwards compatibility risk.

    • Aljaž Mur Eržen@fosstodon.org
      3·
      2 days ago

      @Rogue @snaggen Yeah, it’s a setting in Cargo.toml that you have to update manually if you want to upgrade. It is set to latest edition in new projects. And the nice thing:

      it’s configurable per-crate, not per-compilation. So you can depend on crates that use different editions than your crate. Which avoids ecosystem fragmentation.

      • Rogue@feddit.uk
        1·
        2 days ago

        it’s configurable per-crate, not per-compilation. So you can depend on crates that use different editions than your crate. Which avoids ecosystem fragmentation.

        Thanks! That pre-empted my next question of how quickly crates typically update to newer editions. I guess it doesn’t matter

        • taladar
          1·
          1 day ago

          There is also cargo fix --edition which can update your code in a very conservative way automatically. The result might not be as idiomatic but errs on the side of having semantics that do not change.