Is it possible to call Dart functions from Rust?

[kodjodevf]

Hi and thank you for your work, I want to know if there is a way to call Dart functions from Rust.

[temeddix]

Hi @kodjodevf :)

Rinf is purely event-driven, and you can notify Dart with a signal from Rust. However, it doesn't include functionalities something like request-response pattern.

Though, you can listen to signals from Dart to remember the state in Rust, with OnceLock.

[kodjodevf]

It would be really interesting to know more about OnceLock and also if you can guide me with an example on how to use it.

[temeddix]

Actually, flutter_rust_bridge v2 supports calling Dart closure from Rust. Rinf is much simpler(thus shinner) than that, as it just provides message passing(event-driven) system, assuming that business logic is totally written in Rust. If you need those functionalities, you might want to consider using flutter_rust_bridge.

However, if you choose to stick with Rinf, please tell me what you're trying to achieve by 'calling Dart functions from Rust', and I'll be happy to assist you further with this issue.

[kodjodevf]

I prefer to use Rinf which is much simpler.

As I am currently working on Mangayomi, I want to use a second language for external sources which can be written in JavaScript/TypeScript (using the boa crate) or Rust (compile to WASM), so I want to use existing functions written in Dart like for http which I customized or even DOM selector and more.
It is because I want to be able to share the same logic between these languages.