fn foo(x: i32) {
    match x {
        const { 3.pow(3) } => println!("three cubed"),
        _ => {}
    }
}

But it looks like inline_const_pat is still unstable, only inline_const in expression position is now stabilized.

It’s because it has to work in pattern contexts as well, which are not expressions.

You can give chisel a try. It tunnels all traffic over http/https, and the client can then create port forwards, just as with ssh, to access other services.