rust - What value does the variable in the following code snippet have? -

fn main() {     let data = &[1..3];     println!("data {:?}", data); } 

what mean have &[1..3] assigned value statement?

firstly:

let foo = &[1,2,3]; 

creates temporary array same lifetime foo binding, , stores reference in foo.

however, that's not program doing. other answer says, it's useful run it, , get:

data [1..3] 

that doesn't [1,2,3]! can trick compiler telling using error messages. know it's not (), let's try first:

fn main() {     let data = &[1..3];     let () = data; } 

this gives error on purpose includes:

error: mismatched types [--explain e0308]  --> <anon>:3:17   |> 3 |>     let () = data;   |>         ^^ expected &-ptr, found () note: expected type `&[std::ops::range<_>; 1]` note:    found type `()` 

and tells answer - data reference (&) array of 1 item ([_;1]), std::ops::range<_> object.