// -*- rust -*-

use std;
import std::task;
import std::comm;

fn sub(parent: comm::_chan<int>, id: int) {
    if id == 0 {
        comm::send(parent, 0);
    } else {
        let p = comm::mk_port();
        let child = task::_spawn(bind sub(p.mk_chan(), id - 1));
        let y = p.recv();
        comm::send(parent, y + 1);
    }
}

fn main() {
    let p = comm::mk_port();
    let child = task::_spawn(bind sub(p.mk_chan(), 200));
    let y = p.recv();
    log "transmission complete";
    log y;
    assert (y == 200);
}