my_key_from_string.rs

#[derive(Debug)]
struct MyKey(String);
impl From<&'static str> for MyKey {
    #[inline(always)]
    fn from(data: &'static str) -> MyKey {
        MyKey(data.into())
    }
}

impl From<String> for MyKey {
    fn from(data: String) -> MyKey {
        MyKey(data)
    }
}

fn main() {
    let string: String = "testing".into();
    let my_key = MyKey::from(string.clone());
    dbg!(my_key);
}