erased-serde
unsafe-code-guidelines
erased-serde | unsafe-code-guidelines | |
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4 | 74 | |
622 | 641 | |
- | 1.4% | |
8.2 | 6.9 | |
about 1 month ago | about 2 months ago | |
Rust | ||
Apache License 2.0 | Apache License 2.0 |
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erased-serde
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Trait object with generic funtion: don't understand how to do it
Have you tried something like this?
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Announcing Valuable, a library for object-safe value inspection
Valuable can complement Serde as Serde's serialization API is not trait-object safe due to the trait's associated types (erased-serde exists to work around the problem but requires allocating for each nested data structure).
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Storing vector of deserializable trait
Try https://github.com/dtolnay/erased-serde instead of just the default serde traits
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Hey Rustaceans! Got an easy question? Ask here (9/2021)!
B. erased-serde
unsafe-code-guidelines
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Passing nothing is surprisingly difficult
Useful context on the Rust side is this issue [1]. It sounds like some of the author's concerns are addressed already.
[1]: https://github.com/rust-lang/unsafe-code-guidelines/issues/4...
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Blog Post: Non-Send Futures When?
Is this captured by one of the known soundness conflicts? If not then should consider adding it to the list.
- Are crates like vcell and volatile cell still unsound?
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Question: Are there things for Unsafe Rust learn from Zig?
There are some competing proposals for different memory models. Stacked borrows is the current proposal, but there are more work in the approproate WG.
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Let's thank who have helped us in the Rust Community together!
Thank you /u/RalfJung for bringing formal methods to Rust, both through models like Stacked Borrows, by developing miri, and by working on unsafe-code-guidelines which aims to specify exactly what is and isn't allowed in unsafe code (surprisingly, it's an open question as 2023!)
- Questions about ownership rule
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Noob Here: Why doesn't this work?
You could imagine some way to make this safe for example automatically convert &'short &'long mut T to &'short &'short T, but it's non-trivial to prove they are safe at all, not to mention ensuring this is correctly implemented in the compiler. If you're interested there's also a discussion on whether the opposite (& & T to & &mut T) is sound here.
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When Zig is safer and faster than (unsafe) Rust
Agreed! MIRI is so good, it still feels like magic to me. It also comforts me that the Rust team takes improving unsafe semantics seriously, with the past Unsafe Code Guidelines WG and today's operational semantics team (t-opsem).
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Safety and Soundness in Rust
I think there are some aspects of this rule that are still undecided. See for example:
- https://github.com/rust-lang/unsafe-code-guidelines/issues/8...
- https://github.com/rust-lang/miri/issues/2732
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I wanna be a crab.
C is much better specified than unsafe Rust. Some things are just not worked out yet in Rust. This may sometimes even bite very experienced devs, such as this issue with Box's aliasing semantics, which tripped up the author of left-right.
What are some alternatives?
serde - Serialization framework for Rust
tokio - A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...
rust-ffi-omnibus - A collection of examples of using code written in Rust from other languages
rust - Empowering everyone to build reliable and efficient software.
minimax-rs - A generic implementation of Negamax in Rust.
rfcs - RFCs for changes to Rust
x11rb - X11 bindings for the rust programming language, similar to xcb being the X11 C bindings
alexandrie - An alternative crate registry, implemented in Rust.
bevy - A refreshingly simple data-driven game engine built in Rust
crates.io - The Rust package registry
miri - An interpreter for Rust's mid-level intermediate representation