From c54ce82d135c2a25bf3d88087f79659631b35e8a Mon Sep 17 00:00:00 2001
From: Kjetil Orbekk <kjetil.orbekk@gmail.com>
Date: Fri, 10 Jun 2016 23:46:13 -0400
Subject: Unfold example.

---
 rust/graph/unfold.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 rust/graph/unfold.rs

(limited to 'rust/graph/unfold.rs')

diff --git a/rust/graph/unfold.rs b/rust/graph/unfold.rs
new file mode 100644
index 0000000..90de74c
--- /dev/null
+++ b/rust/graph/unfold.rs
@@ -0,0 +1,16 @@
+extern crate itertools;
+
+use itertools::Unfold;
+
+fn main() {
+    for n in Unfold::new(1, |state| {
+        if *state < 100 {
+            *state += 1;
+            Some(*state)
+        } else {
+            None
+        }
+    }) {
+        println!("{}", n);
+    }
+}
-- 
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