Trait DowncastAnyAsyncEngine 

pub trait DowncastAnyAsyncEngine {
    // Required method
    fn downcast<Req, Resp, E>(
        &self,
    ) -> Option<Arc<dyn AsyncEngine<Req, Resp, E>>>
       where Req: Data,
             Resp: Data + AsyncEngineContextProvider,
             E: Data;
}

An extension trait that provides a convenient method to downcast an AnyAsyncEngine.

This trait provides the .downcast<Req, Resp, E>() method on Arc<dyn AnyAsyncEngine>, enabling safe downcasting back to the original typed engine.

Safety

The downcast method performs runtime type checking using TypeId comparison. It will only succeed if the type parameters exactly match the original engine’s types.

Usage

use crate::engine::DowncastAnyAsyncEngine;

let any_engine: Arc<dyn AnyAsyncEngine> = // ... from collection
if let Some(typed_engine) = any_engine.downcast::<String, String, ()>() {
    // Use the typed engine
    let result = typed_engine.generate("hello".to_string()).await;
}

Required Methods

fn downcast<Req, Resp, E>(&self) -> Option<Arc<dyn AsyncEngine<Req, Resp, E>>>

where Req: Data, Resp: Data + AsyncEngineContextProvider, E: Data,

Attempts to downcast an AnyAsyncEngine to a specific AsyncEngine type.

Returns Some(engine) if the type parameters match the original engine, or None if the types don’t match.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl DowncastAnyAsyncEngine for Arc<dyn AnyAsyncEngine>

fn downcast<Req, Resp, E>(&self) -> Option<Arc<dyn AsyncEngine<Req, Resp, E>>>

where Req: Data, Resp: Data + AsyncEngineContextProvider, E: Data,

Implementors