2016 Update

Task/Fibonacci-sequence/Rust/fibonacci-sequence-3.rust

@@ -0,0 +1,14 @@
+#![feature(conservative_impl_trait)]
+
+fn main() {
+    for num in fibonacci_gen(10) {
+        println!("{}", num);
+    }
+}
+
+fn fibonacci_gen(terms: i32) -> impl Iterator<Item=f64> {
+    let sqrt_5 = 5.0f64.sqrt();
+    let p  = (1.0 +sqrt_5) / 2.0;
+    let q = 1.0/p;
+    (1..terms).map(move |n| ((p.powi(n) + q.powi(n)) / sqrt_5 + 0.5).floor())
+}