Feature flag collections_drain

Author: Ulrik Sverdrup

src/libcollections/vec.rs

@@ -735,15 +735,15 @@ impl<T> Vec<T> {
     /// # Examples
     ///
     /// ```
-    /// # #![feature(collections)]
+    /// # #![feature(collections_drain, collections_range)]
     ///
     /// // Draining using `..` clears the whole vector.
     /// let mut v = vec![1, 2, 3];
     /// let u: Vec<_> = v.drain(..).collect();
     /// assert_eq!(v, &[]);
     /// assert_eq!(u, &[1, 2, 3]);
     /// ```
-    #[unstable(feature = "collections",
+    #[unstable(feature = "collections_drain",
                reason = "recently added, matches RFC")]
     pub fn drain<R>(&mut self, range: R) -> Drain<T> where R: RangeArgument<usize> {
         // Memory safety
@@ -1827,7 +1827,7 @@ impl<T> Drop for IntoIter<T> {
 }
 
 /// A draining iterator for `Vec<T>`.
-#[unstable(feature = "collections", reason = "recently added")]
+#[unstable(feature = "collections_drain", reason = "recently added")]
 pub struct Drain<'a, T: 'a> {
     /// Index of tail to preserve
     tail_start: usize,