Vendor things

third-party/vendor/generator/examples/fib.rs

@@ -0,0 +1,17 @@
+use generator::{done, Gn};
+
+fn main() {
+    let g = Gn::new_scoped(|mut s| {
+        let (mut a, mut b) = (0, 1);
+        while b < 200 {
+            std::mem::swap(&mut a, &mut b);
+            b += a;
+            s.yield_(b);
+        }
+        done!();
+    });
+
+    for i in g {
+        println!("{i}");
+    }
+}