Compilation error with wasm_bindgen

[Marek Barvíř]

Hello dear developers.

What happened?
I'm trying to use Uuid structure for wasm-bindgen, but I get compiler errors.

Steps to reproduce the behavior:

use wasm_bindgen::prelude::*;

#[wasm_bindgen]
pub struct Foo(pub uuid::Uuid);

What were you expecting?
No compiler error from building it with: wasm-pack build --target nodejs

What's the context?

• Target: wasm32-unknow-unknow, rust version rustc 1.66.0-beta.2 (0040709e3 2022-11-20)

wasm-bindgen = { version = "0.2.83", features = ["serde-serialize"] }
uuid = { version = "1.2.2", features = ["v4", "js", "serde", "wasm-bindgen"] }

[Ashley Mannix]

Hi @barvirm 👋

I’m not sure there’s a native wasm type that a UUID would naturally map to. You should be able to marshal them as byte slices and convert between UUIDs.

If it is expected that libraries implement this trait on types they define though then we can look at what an appropriate implementation would look like.

[Ashley Mannix]

Just coming in through some triage. There hasn't been any activity here for a while. Since there's no native type to directly map a UUID to, I don't think there's anything for us to do here. Callers should pick an appropriate string/binary representation for their use-case.