The closest to implicit you can get is the `#[tokio::main]` attribute macro [1], which expands to something like this fn main() { tokio::runtime::B

The closest to implicit you can get is the `#[tokio::main]` attribute macro [1], which expands to something like this fn main() { tokio::runtime::Builder::new_multi_thread() .enable_all() .build() .unwrap() .block_on(async { println!("Hello world"); }) } [1]: https://docs.rs/tokio/latest/tokio/attr.main.html#using-the-multi-thread-runtime https://docs.rs/tokio/latest/tokio/attr.main.html#using-the-...