The following code all works just fine
fn test(n: &isize) -> isize { *n } fn main() { let a = 3; println!("{}", test(&a)); println!("{}", test(&&a)); println!("{}", test(&&&a)); } ''' Where can I find the documentation of this feature, and how do you call it?
Google: Deref coercion.
OK, but does it mean then that the Deref trait is implemented for &isize?
Yes, see here and here.
Yes, because it is in general implemented for &T for all possible referent types T, including isize.
&T
T
isize
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