rust-playground VS WebAssemblyStudio

That would be true if you used `Vec::clear` too, it doesn't allocate a new vector. My point was that you still end up running Drop implementations with RepeatedField, just not all at once. See https://play.rust-lang.org/?version=stable&mode=debug&editio...

That's a valid Unix path, but rust's quoting does nothing to stop it: https://play.rust-lang.org/?version=stable&mode=debug&editio...

Self-referential structs work fine in Rust and always have.

https://play.rust-lang.org/?version=stable&mode=debug&editio...

The compiler will correctly prevent you from moving the value.

The other way to have a struct that starts out as non-self-referential and then becomes self-referential can be achieved with `unsafe` and `Pin::new_unchecked`, which is how `async {}` is handled.

In rust as currently stands: https://play.rust-lang.org/?version=stable&mode=debug&editio...

On the other hand, both this wrapper and yours are counterproductive if the element size is dynamic (e.g. perhaps you're dealing with some nonsense like:)

    struct ITableColumn {

Overflow checks turn into two's compliments' wrapping, but that's only considered acceptable because bounds checks are not turned off.

https://play.rust-lang.org/?version=stable&mode=release&edit...

I have no idea what you're talking about, but it sounds unnecessarily complicated and why I don't use Rust for any serious work.

This demonstrates the ABA problem in safe Rust: https://play.rust-lang.org/?version=stable&mode=debug&editio...

Substitute the sleep with a combination of doing computation/work and the OS thread scheduler, and you can see how the bug surfaces.

You can also try Rust online using the Rust playground: https://play.rust-lang.org/

(Click ... beside build to get assembly) https://play.rust-lang.org/?version=stable&mode=release&edit...

Unfortunately the go playground doesn't seem to support emitting assembly?

Rust isn't a fully functional language, but the functional features play well with the lifetime system and are optimized well.

(Rust playground example: https://play.rust-lang.org/?version=stable&mode=debug&editio...)

Without any setup : To just get a feel about how the whole webAssembly concept looks like you can check out WebAssembly Studio : an online IDE tool developed by Mozilla that can be used to compile C/C++ and Rust code into WebAssembly (WASM).

https://webassembly.studio/ shows you the WASM code in a human readable format.

Have you seen https://webassembly.studio? Probably worth checking out if you haven't.

As a Rust beginner and Vue user, I wonder how to render the WebAssembly on the browser directly. So I did some investigation on how jsbin and webassembly.studio work. It took some time to finally realize that the generated page is embedded on the IFrame element. So I started to trace Rust Playground and mdBook source code and write on own POST method on wasm-pack.

Yep, it's not actively developed : https://github.com/wasdk/WebAssemblyStudio/commits/master