Dereference-Rust-2018

help
1

I have a code here.
y is the owner for the reference of x.
But in Rust 2018, I could compile and run the code sucessfully without
de-referencing. Could someone explain ?.

fn main()
{

    let x = 5;

    let y = &x;

    println!("{}", x);
    println!("{}", y);

}
2

Formatting with "{}" uses the Display trait. This trait is implemented for references:

impl<T> Display for &T where T: Display + ?Sized

The implementation of Display for references just prints out the value that the reference points to. So printing either 5 or &5 will result in the same output.

3 Likes
3

Thanks for giving clarifications.

4

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