ntp-parser
unsafe-code-guidelines
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ntp-parser | unsafe-code-guidelines | |
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1 | 74 | |
18 | 639 | |
- | 2.2% | |
0.0 | 6.9 | |
over 2 years ago | about 1 month ago | |
Rust | ||
Apache License 2.0 | Apache License 2.0 |
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ntp-parser
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Hey Rustaceans! Got an easy question? Ask here (9/2021)!
Well nom does list out examples on the readme page, though many are probably for older versions of nom. I clicked through a couple and it looks like ntp is up to date with nom 6.0. The last full parser I wrote using nom was in v4.0 days, which was more macro-oriented than current nom. Since what you pass nom is slices of data, you will basically be reading from a file into a buffer, and calling your parsing functions on that. If it returns an error indicating it is incomplete, just read in another chunk of data into your buffer and try again.
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 - Empowering everyone to build reliable and efficient software.
tail - My implementation of the tail tool to (continuously) read the tail end of a file. See https://en.wikipedia.org/wiki/Tail_(Unix)
rfcs - RFCs for changes to Rust
x11rb - X11 bindings for the rust programming language, similar to xcb being the X11 C bindings
rust-ffi-omnibus - A collection of examples of using code written in Rust from other languages
bevy - A refreshingly simple data-driven game engine built in Rust
alexandrie - An alternative crate registry, implemented in Rust.
miri - An interpreter for Rust's mid-level intermediate representation