1. Why does it say where T: Sized for references &T? A reference can definitely point to an unsized type, e.g. &str.

I think the point being made is that the layout shown only applies for Sized T. Layouts for &[T] and &dyn Trait are shown elsewhere on the sheet. &str is noted under &[T].

Edit: although, similar considerations would apply to other pointer types, but that isn’t noted on the sheet except for Box<[T]>

A cup can refer to a variety of different measurements (see Cup (unit) - Wikipedia). The cup OP referenced is a metric cup, a US customary cup is 8 US fluid ounces. Measuring cups can come labelled using cups as a unit, usually including a whole cup, and that is presumably what OP was referring to.

Well, the good news is that according to this list, your instance already blocks Threads.

10 minutes based on my experience.

To give a theological answer, no. A lich is usually understood as a sorcerer who has achieved an undead state or immortality, usually by binding their soul to the corporeal world in a phylactery. That does not apply in Jesus’ case, since he did not pursue any sort of magic to avoid death, much less binding his soul to a phylactery. The resurrection of Jesus was a supernatural act of God, restoring Jesus to true life.

As to the second part of your question, I was not aware that holy water harming liches was a common trope in fiction (it is usually seen in reference to vampires), but even if it is applied to undead more widely, we have established that Jesus was restored to true life, not to any form of unnatural undeath. Moreover, holiness comes from God (that which is holy is set apart for God), and Jesus is fully God, so contact with holy things would not harm him. Indeed, Christ is now in the true holy place in heaven (Hebrews 9:24), which we can only enter when cleansed by his blood (Hebrews 10:19-22).

I’m glad my points we’re helpful!

There is some documentation on examples in the Cargo book. The basic procedure is to put it in an examples directory alongside the src directory (and in its own subfolder if it has multiple files), and you can add an entry for it in the Cargo.toml (although it should automatically detect it if you put it in the examples directory, so that is only strictly necessary if you want to change the default settings).

A few things I noticed:

• In http::request::parse(), do you actually need a BufReader? It would be better to make it generic over something implementing BufRead, that allows what you have but also makes tests and examples easier since you wouldn’t have to open a TCP connection just to do something that is essentially string parsing.
• In http::response::Response::to_string(), that match on lines 78-85 makes me uneasy, because you are silently changing the status code if it isn’t one you recognise. It would be better to signal an error. It would be even better to just check when the status code is set (perhaps with a status code enum to list the ones you support, since what you have isn’t all the defined codes) so that you can’t fail when converting to a string.
• Consider whether you need a special to_string() method at all, or whether you can just implement Display (which gives you to_string() for free via the ToString trait).
• You are using String as an error type pretty much everywhere. The better approach is to create an enum representing all the possible errors, so that a user of your library can match against them. Make the enum implement Error and Display and it will fit fine into the rest of the error handling infrastructure. There are crates like thiserror that can reduce the boilerplate around this.
• You have an io.rs that doesn’t appear to be connected to anything.
• You have a main.rs, which seems off in something that sounds like it should be purely a library crate. You probably want that to be an example or an integration test instead.

That’s all I could see with a quick look. In terms of general advice: remember to look at warnings, run cargo clippy, and look at the API guidelines.

25 isn’t too young, and makes sense if you have focused on education and career. I followed a similar path in that I spent a lot of time in education, only starting to properly consider courting someone around the age of 25 or 26 after I finished my PhD. Things were complicated somewhat by Covid, but I got married last year at the age of 30.

As to losing weight, I can’t speak much from experience on that, but losing some weight may be a good idea, as much for your own health as anything else. Unless you are really overweight (in which case it is a medical issue that you should address), I think you shouldn’t worry too much about it in terms of dating.

The Rust book is the official standard resource for learning Rust. It assumes some experience in another programming language, but it doesn’t matter which one (that is, it isn’t aimed at teaching Rust as a first programming language), so there’s no reason why you couldn’t read it with some experience in C.

Depending on what sort of C programmer you are, you may find Learn Rust the Dangerous Way of interest as well.