}
/// Keep unyielded elements in the source `Vec`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// #![feature(drain_keep_rest)]
+ ///
+ /// let mut vec = vec!['a', 'b', 'c'];
+ /// let mut drain = vec.drain(..);
+ ///
+ /// assert_eq!(drain.next().unwrap(), 'a');
+ ///
+ /// // This call keeps 'b' and 'c' in the vec.
+ /// drain.keep_rest();
+ ///
+ /// // If we wouldn't call `keep_rest()`,
+ /// // `vec` would be empty.
+ /// assert_eq!(vec, ['b', 'c']);
+ /// ```
#[unstable(feature = "drain_keep_rest", issue = "none")]
pub fn keep_rest(self) {
// At this moment layout looks like this:
}
/// Keep unyielded elements in the source `Vec`.
+ ///
+ /// # Examples
+ ///
+ /// ```
+ /// #![feature(drain_filter)]
+ /// #![feature(drain_keep_rest)]
+ ///
+ /// let mut vec = vec!['a', 'b', 'c'];
+ /// let mut drain = vec.drain_filter(|_| true);
+ ///
+ /// assert_eq!(drain.next().unwrap(), 'a');
+ ///
+ /// // This call keeps 'b' and 'c' in the vec.
+ /// drain.keep_rest();
+ ///
+ /// // If we wouldn't call `keep_rest()`,
+ /// // `vec` would be empty.
+ /// assert_eq!(vec, ['b', 'c']);
+ /// ```
#[unstable(feature = "drain_keep_rest", issue = "none")]
pub fn keep_rest(self) {
// At this moment layout looks like this: