trait Blanket {
    fn blanket(&self) -> &'static str;
}

struct StringBlanket<'a>(&'a String);

impl<'a> Blanket for StringBlanket<'a> {
    fn blanket(&self) -> &'static str {
        "string"
    }
}

struct CloneBlanket<T: Clone>(T);

impl<T: Clone> Blanket for CloneBlanket<T> {
    fn blanket(&self) -> &'static str {
        "clone"
    }
}

impl<'a> Into<StringBlanket<'a>> for &'a String {
    fn into(self) -> StringBlanket<'a> {
        StringBlanket(self)
    }
}

fn blanket<B: Blanket, T: Into<B>>(b: T) {
    let b = b.into();
    println!("{}", b.blanket());
}


fn main() {
    blanket::<StringBlanket<'_>, _>(&"123".to_string());
    blanket(123);
}