How can i use StreamSink with structs ?

[iamguid]

So if i define some struct, for example:

pub struct MidiMessage {
    pub message: u8,
    pub stamp: u64,
}

and then I want to use MidiMessage in StreamSink, for example:

pub fn connect_to_port(in_port_index: usize, sink: StreamSink<MidiMessage>, arg: String) -> Result<()> {
    let mut midi_in = MidiInput::new("midir reading input")?;
    midi_in.ignore(Ignore::None);

    let in_ports = midi_in.ports();
    let in_port = in_ports.get(in_port_index)
        .ok_or("Invalid port index")
        .unwrap();

    let connection_in = midi_in.connect(in_port, "midir-read-input", move |stamp, message, _| {
        sink.add({
            message,
            stamp,
        });
    }, ());

    Ok(())
}

I get an error

error[E0277]: the trait bound `DartCObject: From<MidiMessage>` is not satisfied
  --> src/api.rs:30:52
   |
30 | pub fn connect_to_port(in_port_index: usize, sink: StreamSink<MidiMessage>, arg: String) -> Result<()> {
   |                                                    ^^^^^^^^^^^^^^^^^^^^^^^ the trait `From<MidiMessage>` is not implemented for `DartCObject`
   |
   = note: required because of the requirements on the impl of `Into<DartCObject>` for `MidiMessage`
   = note: required because of the requirements on the impl of `IntoDart` for `MidiMessage`

How can i use StreamSink with structs ? What is the best way ?

[fzyzcjy]

Have you run the code generator?

If so please make a reproducible sample (e.g. a github repo) and paste link here

[fzyzcjy]

Hey you have not run the code generator!

please follow readme :(

[iamguid]

I cannot compile because not implemented trait IntoDart. Question is how can i use StreamSink with structs ? What is the best way ?

[fzyzcjy]

RUN the code generator does not mean COMPILE the project. Could you please follow readme and run the example first?

StreamSink with structs is no problem. Your way is correct.

[iamguid]

Thanks for your help, sory for your time, I figure it out.

[fzyzcjy]

You are welcome!