"Hello Tokio" step of tutorial and "into" method

[mvolkmann]

In this line from the "Hello Tokio" step, where is the into method implemented that presumably creates a Bytes value from a &str value?

    client.set("hello", "world".into()).await?;

[barkanido]

the set fn is of type

pub async fn set(&mut self, key: &str, value: Bytes) -> crate::Result<()>

which means that the &str "world" is converted into Bytes using into(). into is automatically generated by the compiler because the Bytes struct is implementing several from methods. see here.

This is the idiomatic way for type conversions in Rust. For more information about how it works, you can read about the From trait.