Code shared from the Rust Playground

playground.rs

fn main() {}

fn unwrap_array<T>(input: [Option<T>; 2]) -> Option<[T; 2]> {
    // Note: `{ }` is required here.
    match {input} {
        [Some(a), Some(b)] => Some([a, b]),
        _ => None,
    }
}

fn unwrap_tuple<T>(input: (Option<T>, Option<T>)) -> Option<[T; 2]> {
    // But optional here.
    match input {
        (Some(a), Some(b)) => Some([a, b]),
        _ => None,
    }
}