1 files changed, 24 insertions, 0 deletions
diff --git a/examples/21_spawn.rs b/examples/21_spawn.rs
new file mode 100644
index 0000000..770bb21
--- /dev/null
+++ b/examples/21_spawn.rs
@@ -0,0 +1,24 @@
+fn ack (m: uint, n: uint) -> uint {
+    match (m, n) {
+        (0, n) => n + 1,
+        (m, 0) => ack(m - 1, 1),
+        (m, n) => ack(m - 1, ack(m, n - 1)),
+    }
+}
+fn main () {
+    let (write, read) = channel();
+    let (m, n) = (3, 10);
+
+    spawn(proc () {
+        write.send(ack(m, n));
+    });
+
+    let mut result = read.try_recv();
+    while !result.is_ok() {
+        println!(".");
+        std::io::timer::sleep(100);
+        result = read.try_recv();
+    }
+    println!("Ack({}, {}) = {}", m, n, result.unwrap_or_else(|e| { fail!(e) }));
+}
+