this post was submitted on 05 Apr 2024
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Learning Rust and Lemmy

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A collaborative space for people to work together on learning Rust, learning about the Lemmy code base, discussing whatever confusions or difficulties we're having in these endeavours, and solving problems, including, hopefully, some contributions back to the Lemmy code base.

Rules TL;DR: Be nice, constructive, and focus on learning and working together on understanding Rust and Lemmy.

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  1. This is a place to learn and work together.
  2. Questions and curiosity is welcome and encouraged.
  3. This isn't a technical support community. Those with technical knowledge and experienced aren't obliged to help, though such is very welcome. This is closer to a library of study groups than stackoverflow. Though, forming a repository of useful information would be a good side effect.
  4. This isn't an issue tracker for Lemmy (or Rust) or a place for suggestions. Instead, it's where the nature of an issue, what possible solutions might exist and how they could be or were implemented can be discussed, or, where the means by which a particular suggestion could be implemented is discussed.

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  1. Lemmy.ml rule 2 applies strongly: "Be respectful, even when disagreeing. Everyone should feel welcome" (see Dessalines's post). This is a constructive space.
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  3. Posts and comments should be (more or less) within scope (on which see Policies and Purposes above).
  4. See the Lemmy Code of Conduct
  5. Where applicable, rules should be interpreted in light of the Policies and Purposes.

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Looking to learn Rust? Curious about Rust? Feel free to ask me (feddit.dk)
submitted 5 months ago by [email protected] to c/[email protected]
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Hey!

I'm a professional software engineer with several years of experience using Rust. Unfortunately I don't really have the time to contribute to Lemmy directly myself, but I love teaching other people Rust so if:

  • You are curious about Rust and why you should even learn it
  • You are trying to learn Rust but maybe having a hard time
  • You are wondering where to start
  • You ran into some specific issue

... or anything to do with Rust really, then feel free to ask in the comments or shoot me a PM ๐Ÿ™‚

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[โ€“] [email protected] 5 points 5 months ago (1 children)

Unfortunately embedded programming is not something I have first hand experience with, but I've read how it works.

The Rust standard library is actually split into 3 layers:

  1. Core: This is core stuff built into the language. No dependencies needed. No memory allocation, no syscalls, no nothing basically. This defines the primitive types like i32 and str and pure functions on those.
  2. Alloc: Provides heap memory allocation on top of core, giving access to types like Vec and String. Still no operating system so no file IO or anything like that.
  3. Std: The full standard library that generally assumes the presence of an operating system with file systems and networking and all that jazz.

You probably want to check out the Rust embedded book.

The language is obviously still the same even if not using the full standard library. Feel free to ask more specific stuff, though I'm not very familiar with embedded.

[โ€“] [email protected] 2 points 5 months ago (1 children)

Thanks for the answer.

Since I am more interested in the embedded side of Rust (though I don't mind the software side of it), do you think I am better off starting directly with embedded Rust? Since the std lib is not available for embedded.

[โ€“] [email protected] 2 points 5 months ago

I think you should go for what interests you, that will be the best way to learn since you'll be motivated. If you mostly intend to do embedded anyway, learning anything else could just be a waste of time. I guess it'll just be easier since you won't have to learn the standard library :P