core: add the IntoIterator trait

src/libcore/array.rs

@@ -18,12 +18,14 @@ use clone::Clone;
 use cmp::{PartialEq, Eq, PartialOrd, Ord, Ordering};
 use fmt;
 use hash::{Hash, Hasher, self};
+use iter::IntoIterator;
 use marker::Copy;
 #[cfg(stage0)]
 use ops::{Deref, FullRange};
 #[cfg(not(stage0))]
 use ops::Deref;
 use option::Option;
+use slice::{Iter, IterMut, SliceExt};
 
 // macro for implementing n-ary tuple functions and operations
 macro_rules! array_impls {
@@ -49,6 +51,22 @@ macro_rules! array_impls {
                 }
             }
 
+            impl<'a, T> IntoIterator for &'a [T; $N] {
+                type Iter = Iter<'a, T>;
+
+                fn into_iter(self) -> Iter<'a, T> {
+                    self.iter()
+                }
+            }
+
+            impl<'a, T> IntoIterator for &'a mut [T; $N] {
+                type Iter = IterMut<'a, T>;
+
+                fn into_iter(self) -> IterMut<'a, T> {
+                    self.iter_mut()
+                }
+            }
+
             #[stable(feature = "rust1", since = "1.0.0")]
             impl<A, B> PartialEq<[B; $N]> for [A; $N] where A: PartialEq<B> {
                 #[inline]