-- Source

fun make_add() : (num, num) -> num =
    \a, b -> num = {
        println(a + b);
        return a + b;
    };

let add = make_add();

fun main() = {
    let foo = 34;

    let bar = 35 in {
        let r = add(foo, bar);

        match r
        | 69 -> println(r);
        | 42 -> println("What");
        | _  -> println("Unreachable");
    };
};

--- Alpha
Convert `match` to `if-else`
Convert `let` to `call`
---

(fun make_add []
    (lambda [a b] (do
        (println (+ a b))
        (+ a b)
    )))

(fun add [a b] (+ a b))

(fun main [] (do
    (def foo 34)

    ((lambda [bar] (do
        (def r (add foo bar))
        (if (= r 69) (println r)
            (= r 42) (println "What")
            true     (println "Unreachable"))
    )) bar)
))