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Godot Rust FAQ

The trait bound `...ToGodot` is not satisfied

Error

The trait bound YourClass:godot::prelude::ToGodot is not satisfied.

Reason

you need to define how to pass it around in godot(e.g. function with #[func]).
Otherwise godot have no idea how to reference your Class in functions that talk about it.

Solutions

Choose one of the following solutions:

  1. (Recommend) Change YourClass to Gd<YourClass>.
  2. Implementing GodotConvert, ToGodot, and FromGodot to use some other type as an intermediate.