rust-quiz VS reference

If you didn't like these because they're "trick" questions you likely also would not enjoy CppQuiz (https://cppquiz.org/)

However you might well enjoy https://dtolnay.github.io/rust-quiz/

Like the C++ quiz, "Undefined Behaviour" is a valid answer, however, the quiz questions are about safe Rust, so that answer is always wrong.

I still get more than half of them wrong unless given far too long to think about it.

Cool, but I feel like the current questions are super basic. Something you're able to answer after reading the book and toying with Rust on a weekend. Definitely needs some harder questions, maybe feel inspired by https://dtolnay.github.io/rust-quiz/?

> If we accept that Rust is indeed more difficult to learn than comparable systems programming languages

My problem is with "comparable systems programming languages". To me the only thing that fits there today is C++ and while a great many programming languages would be easier to learn than Rust, C++ is not one of them by a long shot.

I think the C++ Quiz https://cppquiz.org/ and the Rust Quiz https://dtolnay.github.io/rust-quiz/ illustrate handily. Neither of these languages is a walk in the park, but, notice they both have "Undefined behaviour" as a possible answer? Safe Rust doesn't actually have undefined behaviour, so you get to rule out one of the possibilities any time you don't see the "unsafe" keyword, which is in fact every time on the Rust Quiz. In C++ some of the quiz questions invoke UB, but good luck correctly guessing which ones.

Do you actually want to question all you know about Rust? Do this amazing quiz by the famed dtolnay.

If you want a correct and much harder Rust quiz, here you go.

⭐ Rust Quiz - David Tolnay

One surprise perhaps is that both Python and C++ have multiple inheritance whereas Rust doesn't have implementation inheritance at all (Rust's traits can inherit but data structures and implementations cannot).

Both C++ and Rust have similar Quiz sites:

https://dtolnay.github.io/rust-quiz/

Obligatory: https://dtolnay.github.io/rust-quiz/

There is also this quiz

Is perfectly valid Rust code. And there's reborrow, too.

I truly appreciate how much effort u/ehuss puts into maintaining The Rust Reference, considering that documenting stuff is not usually a fun task people want to do. Not to mention that ehuss is also the Cargo team lead, responsible for developing one of the most loved tools in Rust. ehuss's insightful knowledge always ensures that Cargo works without unexpected surprises.

Here is (somewhat long) discussion on the topic with other examples: https://github.com/rust-lang/reference/issues/788

The PR for updating the documentation is here, still under discussion: https://github.com/rust-lang/reference/pull/1055

thank you this is definitely interesting and i need to read more. For anyone else, this is the thing I found about this issue when I looked it up. It's a github issue about how little documentation there is on the subject and that there should be more. Even the initial post has a lot of interesting details and links. Thanks for bringing it up although sorry it seems your comment went a bit over the heads of some redditors.

⭐ The Rust Reference - repo

For the rust reference, there is an open pull request https://github.com/rust-lang/reference/pull/1265/

&mut * is reborrowing which is allowed

Officialhttps://www.youtube.com/watch?v=rAl-9HwD858&list=PLqbS7AVVErFiWDOAVrPt7aYmnuuOLYvOa The official rust book Rust by example The rust docs Rustlings the most fun way imo

I've opened a PR to add this more prominently to the Conditional Compilation entry in the Rust reference.