Reusing Stream (and StreamSink)

[cwahn]

Hello,

I am really enjoying the experience of Flutter Rust Bridge, and thank you for the great library.

However, I have a question regarding the Stream-StreamSink API.
As far as I went through the code and docs, it seems like calling frb function with StreamSink argument is pretty much the only way to pass Stream to dart-side.

In many cases, I can pass around generate stream in dart, but sometime, I must get it from rust code directly.
This results creating brand new Stream-StreamSink every time, and enforcing rust to keep Vec of StreamSink which is not so efficient.

So, it is true that there is no way to pass a Stream to dart connected with existing StreamSink in rust?
Is this an actual limitation by design?

[fzyzcjy]

You are welcome!

old answer

it seems there can be e.g. a vec of streams https://cjycode.com/flutter_rust_bridge/guides/types/translatable/stream#stream-argument-in-arbitrary-types

btw, this may be useful https://cjycode.com/flutter_rust_bridge/guides/direction/rust-call-dart

EDIT: oh I understand your question now. It is because, one StreamSink will have one target Dart location to send things to. It is possible to extend the logic, and feel free to PR for that if needed. However, maybe one way is to just get the stream from Dart side. Could you please elaborate a bit why the stream needs to be gotten from Rust? Maybe we can discuss how to workaround it. (e.g. a naive way - make a dart wrapper class that stores the stream)