From 103e79d26a60ef87df304799e8032c6b54698973 Mon Sep 17 00:00:00 2001
From: Nathaniel Theis <nttheis@gmail.com>
Date: Tue, 26 May 2015 16:39:18 -0700
Subject: Implement RFC 771: std::iter::once

---
 src/libcoretest/iter.rs | 13 +++++++++++++
 src/libcoretest/lib.rs  |  2 ++
 2 files changed, 15 insertions(+)

(limited to 'src/libcoretest')

diff --git a/src/libcoretest/iter.rs b/src/libcoretest/iter.rs
index 0415c75aa52..8e817bcbc2a 100644
--- a/src/libcoretest/iter.rs
+++ b/src/libcoretest/iter.rs
@@ -1096,6 +1096,19 @@ fn test_fuse_count() {
     // Can't check len now because count consumes.
 }
 
+#[test]
+fn test_once() {
+    let mut it = once(42);
+    assert_eq!(it.next(), Some(42));
+    assert_eq!(it.next(), None);
+}
+
+#[test]
+fn test_empty() {
+    let mut it = empty::<i32>();
+    assert_eq!(it.next(), None);
+}
+
 #[bench]
 fn bench_rposition(b: &mut Bencher) {
     let it: Vec<usize> = (0..300).collect();
diff --git a/src/libcoretest/lib.rs b/src/libcoretest/lib.rs
index 3d14b3f3c81..970ae11e749 100644
--- a/src/libcoretest/lib.rs
+++ b/src/libcoretest/lib.rs
@@ -25,6 +25,8 @@
 #![feature(slice_patterns)]
 #![feature(float_from_str_radix)]
 #![feature(cell_extras)]
+#![feature(iter_empty)]
+#![feature(iter_once)]
 
 extern crate core;
 extern crate test;
-- 
cgit 1.4.1-3-g733a5