Multiple patterns not working with if let

Question

You can use if let to pattern match on a range:

let n=1
if let 1...3 = n { println!("found in range") }

but I can't make it work on multiple patterns:

// this does not compile
if let 1 | 2 | 3 = n { println!("found in pattern") }
//      -^ unexpected token

I thought the second if let desugared to:

// this does compile and work
match n {
    1 | 2 | 3 => println!("found in pattern"),
    _ => {}
}

so what gives? Am I using the wrong syntax? Is my expectation that multiple patterns should work just misguided? Is this just not implemented?

playground

Answer 1

if let just doesn't support multiple patterns (see RFC issue 935). Use match instead.