async Responder impl in Rocket 0.5

[barlindhaug]

I have a responder that needs to call an async function, here foo, Is this possible in Rocket 0.5?

#[rocket::async_trait]
impl<'r> Responder<'r, 'static> for Error {
    async fn respond_to(self, req: &'r Request<'_>) -> response::Result<'static> {
        foo().await
    }
}

Will give the following error:

error[E0195]: lifetime parameters or bounds on method `respond_to` do not match the trait declaration
async fn respond_to(self, req: &'r Request<'_>) -> response::Result<'static> {
lifetimes do not match method in trait

[SergioBenitez]

It is not. You should have a constructor that is async instead. See, for example, NamedFile::open().

[barlindhaug]

Thank you for your quick reply.

I also see this is already answered here for anyone interested:
#1065 (comment)