Code shared from the Rust Playground

playground.rs

macro_rules! iflet {
    ([$p:pat = $e:expr] $($rest:tt)*) => {
        if let $p = $e {
            iflet!($($rest)*);
        }
    };
    ($b:block) => {
        $b
    };
}


fn main() {
    iflet!([Some(a) = foo_a()] [Some(b) = foo_b()] [Some(c) = foo_c()] {
        println!("{} {} {}", a, b, c);
    });
}

fn foo_a() -> Option<u32> {
    Some(0)
}

fn foo_b() -> Option<u32> {
    Some(1)
}

fn foo_c() -> Option<u32> {
    Some(2)
}