ludic/docs/language/udp/udp-recv.md

id	name	category	kind	tokens	sig	tip	order	ns	member
udp-recv	Udp.recv	udp	namespace-method	Udp.recv	Udp.recv(socket, bytes, cap) -> int	Read the next waiting datagram.	3	Udp	recv

Copies the next waiting datagram, up to cap bytes, into bytes and returns its length, or 0 when nothing is waiting. It never blocks: call it in a loop each frame until it returns 0. The sender is Udp.from_ip / from_port.

program Demo {
  entry {
    let s = Udp.open(port: 0)
    let buf = Memory.bytes(64)
    print(Udp.recv(socket: s, bytes: buf, cap: 64))
  }
}