Generated class implements non-exist class

[Xudiwen]

Greetings.
I was new to this and ran into trouble soon.
I have Rust codes like:

pub struct Photo {
  ...
}
impl Datum for Photo {
  ...
}

It generates

abstract class Photo implements RustOpaqueInterface, Datum {
  ...
}

However, the Datum class is not generated.
I tried to add #[frb(ignore)] above impl Datum for Photo, which is like:

pub struct Photo {
  ...
}
#[frb(ignore)]
impl Datum for Photo {
  ...
}

Then the methods of Datum disappeared in Photo Dart code, but the implements Datum is still there.
I've searched for docs and existing issues but unfortunately cannot find something helpful.
So is there any suggestions?
I'm now working on flutter_rust_bridge_codegen 2.7.0.

[welcome]

Hi! Thanks for opening your first issue here! 😄

[fzyzcjy]

Hmm how is your Datum defined? Is it third-party or something like that? Looks like this may an edge case that has not been considered. A workaround is to use dart_preamble: import "my_dummy_definitions.dart", and in that dart file, manually write down an empty class class Datum {}.

[Xudiwen]

Hmm how is your Datum defined? Is it third-party or something like that? Looks like this may an edge case that has not been considered. A workaround is to use dart_preamble: import "my_dummy_definitions.dart", and in that dart file, manually write down an empty class class Datum {}.

Thank you for replying.

I'm not sure but the Datum trait is not a dyn trait, i.e. it contains some function and is Sized.
I wonder if traits like this (non-dyn) should not be considered an interface and implements by dart class.
I haven't tried to compare behavior differences between dyn trait or non-dyn trait, but at least the Datum was not translated into dart class.

The workaround works fine. Thanks a lot! This issue is free to be closed now.

[fzyzcjy]

Hmm, I guess it may be reasonable to be an interface. Though currently &dyn MyTrait is translated, but later &impl MyTrait may also be technically possible to have.

The workaround works fine. Thanks a lot! This issue is free to be closed now.

You are welcome!