#![feature(unsize)]
#![feature(allocator_internals)]
-#![cfg_attr(not(test), feature(fused, fn_traits, placement_new_protocol))]
+#![cfg_attr(not(test), feature(fused, fn_traits, placement_new_protocol, swap_with_slice))]
#![cfg_attr(test, feature(test, box_heap))]
// Allow testing this library
core_slice::SliceExt::copy_from_slice(self, src)
}
+ /// Swaps all elements in `self` with those in `src`.
+ ///
+ /// The length of `src` must be the same as `self`.
+ ///
+ /// # Panics
+ ///
+ /// This function will panic if the two slices have different lengths.
+ ///
+ /// # Example
+ ///
+ /// ```
+ /// #![feature(swap_with_slice)]
+ ///
+ /// let mut src = [1, 2, 3];
+ /// let mut dst = [7, 8, 9];
+ ///
+ /// src.swap_with_slice(&mut dst);
+ /// assert_eq!(src, [7, 8, 9]);
+ /// assert_eq!(dst, [1, 2, 3]);
+ /// ```
+ #[unstable(feature = "swap_with_slice", issue = "44030")]
+ pub fn swap_with_slice(&mut self, src: &mut [T]) {
+ core_slice::SliceExt::swap_with_slice(self, src)
+ }
+
/// Copies `self` into a new `Vec`.
///
/// # Examples
#[stable(feature = "copy_from_slice", since = "1.9.0")]
fn copy_from_slice(&mut self, src: &[Self::Item]) where Self::Item: Copy;
+ #[unstable(feature = "swap_with_slice", issue = "44030")]
+ fn swap_with_slice(&mut self, src: &mut [Self::Item]);
+
#[stable(feature = "sort_unstable", since = "1.20.0")]
fn sort_unstable(&mut self)
where Self::Item: Ord;
}
}
+ #[inline]
+ fn swap_with_slice(&mut self, src: &mut [T]) {
+ assert!(self.len() == src.len(),
+ "destination and source slices have different lengths");
+ unsafe {
+ ptr::swap_nonoverlapping(
+ self.as_mut_ptr(), src.as_mut_ptr(), self.len());
+ }
+ }
+
#[inline]
fn binary_search_by_key<'a, B, F, Q: ?Sized>(&'a self, b: &Q, mut f: F) -> Result<usize, usize>
where F: FnMut(&'a Self::Item) -> B,