New upstream version 1.12.0+dfsg1

[rustc.git] / src / libcollectionstest / vec.rs

diff --git a/src/libcollectionstest/vec.rs b/src/libcollectionstest/vec.rs
index cb99659cc0ead7238fd30d75d49cdef095aea976..537fabf8ab69bb14391074ad9dacea5bd1fb2318 100644 (file)
--- a/src/libcollectionstest/vec.rs
+++ b/src/libcollectionstest/vec.rs
@@ -11,6 +11,7 @@
 use std::borrow::Cow;
 use std::iter::{FromIterator, repeat};
 use std::mem::size_of;
+use std::vec::{Drain, IntoIter};
 
 use test::Bencher;
 
@@ -477,6 +478,29 @@ fn test_split_off() {
     assert_eq!(vec2, [5, 6]);
 }
 
+#[test]
+fn test_into_iter_as_slice() {
+    let vec = vec!['a', 'b', 'c'];
+    let mut into_iter = vec.into_iter();
+    assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
+    let _ = into_iter.next().unwrap();
+    assert_eq!(into_iter.as_slice(), &['b', 'c']);
+    let _ = into_iter.next().unwrap();
+    let _ = into_iter.next().unwrap();
+    assert_eq!(into_iter.as_slice(), &[]);
+}
+
+#[test]
+fn test_into_iter_as_mut_slice() {
+    let vec = vec!['a', 'b', 'c'];
+    let mut into_iter = vec.into_iter();
+    assert_eq!(into_iter.as_slice(), &['a', 'b', 'c']);
+    into_iter.as_mut_slice()[0] = 'x';
+    into_iter.as_mut_slice()[1] = 'y';
+    assert_eq!(into_iter.next().unwrap(), 'x');
+    assert_eq!(into_iter.as_slice(), &['y', 'c']);
+}
+
 #[test]
 fn test_into_iter_count() {
     assert_eq!(vec![1, 2, 3].into_iter().count(), 3);
@@ -510,6 +534,12 @@ fn test_cow_from() {
     }
 }
 
+#[allow(dead_code)]
+fn assert_covariance() {
+    fn drain<'new>(d: Drain<'static, &'static str>) -> Drain<'new, &'new str> { d }
+    fn into_iter<'new>(i: IntoIter<&'static str>) -> IntoIter<&'new str> { i }
+}
+
 #[bench]
 fn bench_new(b: &mut Bencher) {
     b.iter(|| {