Or you can go all the way in the other direction (double- or triple-barreled CPS) and have functions that can't return but only call other functions. let f

Or you can go all the way in the other direction (double- or triple-barreled CPS) and have functions that can't return but only call other functions. let fizzbuzz = func(ret, fizzbuzz, x, max) { (x == max)(ret, func() { let printed = false; (x % 3)(func (t0) { let k0 = func() { (x % 5)(func (t1) { let k1 = func() { let k2 = func() { (x + 1)(func (t2) { fizzbuzz(ret, fizzbuzz, t2, max); }) }; (printed == false)(func () { print(k2, x); }, k2); }; (t1 == 0)(func () { print(func() { printed = true; k1(); }, "buzz"); }, k1); }); }; (t0 == 0)(func() { print(func() { printed = true; k0(); }, "fizz"); }, k0); }); }); } fizzbuzz($halt, fizzbuzz, 0, 100);