zo

  
-! An Ui counter program in zo.

fun main() {
  mut count: int = 0;

  -- Look! You can use `zsx` to declare Ui.
  imu counter: </> ::= <>
    <button @click={fn() => count -= 1}>-</button>
    {count} <!-- HTML comments are supported in `zsx` -->
    <button @click={fn() => count += 1}>+</button>
  </>;

  #dom counter;
}

  
-! A Channel send / recv program in zo.

fun producer(tx: Tx<int>) {
  tx.send(42);
}
fun consumer(rx: Rx<int>) {
  imu value: int = rx.recv();
  showln("got {value}");  
}
fun main() {
  nursery {
    imu (tx, rx) := channel();
    spawn producer(tx);
    spawn consumer(rx);
  }

  showln("DONE");
}

  
-! A fizzbuzz using match program in zo.

fun fizzbuzz(n: int) {
  mut x := 1;

  for x := 1..=n {
    match (x % 3, x % 5) {
      (0, 0) => showln("fizzbuzz"),
      (0, _) => showln("fizz"),
      (_, 0) => showln("buzz"),
      _ => showln("{x}"),
    }
  }
}
fun main() {
  fizzbuzz(100)
}

  
-! A zo program that use generics and monomorphization.

struct Box<$A, $B> {
  a: $A,
  b: $B,
}
fun main() {
  -- 2-param: monomorphic int/int.
  imu b1 := Box { a: 1, b: 2 };
  showln(b1.a);
  showln(b1.b);

  -- 2-param: int/str. Pre-fix this printed a stack
  imu b2 := Box { a: 42, b: "hi" };
  showln(b2.a);
  showln(b2.b);
}