Derive Macro Actor

#[derive(Actor)]
{
    // Attributes available to this derive:
    #[actor]
}

Derives the Actor trait for a struct. By default, generates an implementation with no params (type Params = () and async fn new(_params: ()) -> Result<Self, anyhow::Error>). This requires that the Actor implements Default.

If the #[actor(passthrough)] attribute is specified, generates an implementation with where the parameter type is Self (type Params = Self and async fn new(instance: Self) -> Result<Self, anyhow::Error>).

Examples

Default behavior:

#[derive(Actor, Default)]
struct MyActor(u64);

Generates:

#[async_trait]
impl Actor for MyActor {
    type Params = ();

    async fn new(_params: ()) -> Result<Self, anyhow::Error> {
        Ok(Default::default())
    }
}

Passthrough behavior:

#[derive(Actor, Default)]
#[actor(passthrough)]
struct MyActor(u64);

Generates:

#[async_trait]
impl Actor for MyActor {
    type Params = Self;

    async fn new(instance: Self) -> Result<Self, anyhow::Error> {
        Ok(instance)
    }
}