Slicing syntax should work for &&[T]

[nrc]

Probably. At least (*foo)[..42] is pretty ugly

Either we implement Slice for &[T] (currently only implemented for [T]) or we do the same autoref/deref for slices as we do for method call.

[sfackler]

It should also work through Deref.

[japaric]

This seems to be working:

#![feature(slicing_syntax)]

fn main() {
    let s: &[int] = &[0, 1, 2, 3, 4];
    let ss: &&[int] = &s;
    let sss: &&&[int] = &ss;

    println!("{}", s[..3]);
    println!("{}", ss[3..]);
    println!("{}", sss[2..4]);
}

As of:

rustc 0.13.0-dev (e84e7a00d 2014-11-06 08:06:50 +0000)

[alexcrichton]

Flagging as needtest.