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Auto merge of #61620 - SimonSapin:as_cell, r=RalfJung

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Stabilize Cell::from_mut and as_slice_of_cells

FCP: https://github.com/rust-lang/rust/issues/43038#issuecomment-499900463
This commit is contained in:
bors 2019-06-08 10:15:31 +00:00
commit fb7cca33f8
2 changed files with 2 additions and 5 deletions
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6
src/libcore/cell.rs
View file

@ -494,7 +494,6 @@ impl<T: ?Sized> Cell<T> {
/// # Examples
///
/// ```
/// #![feature(as_cell)]
/// use std::cell::Cell;
///
/// let slice: &mut [i32] = &mut [1, 2, 3];
@ -504,7 +503,7 @@ impl<T: ?Sized> Cell<T> {
/// assert_eq!(slice_cell.len(), 3);
/// ```
#[inline]
#[unstable(feature = "as_cell", issue="43038")]
#[stable(feature = "as_cell", since = "1.37.0")]
pub fn from_mut(t: &mut T) -> &Cell<T> {
unsafe {
&*(t as *mut T as *const Cell<T>)
@ -541,7 +540,6 @@ impl<T> Cell<[T]> {
/// # Examples
///
/// ```
/// #![feature(as_cell)]
/// use std::cell::Cell;
///
/// let slice: &mut [i32] = &mut [1, 2, 3];
@ -550,7 +548,7 @@ impl<T> Cell<[T]> {
///
/// assert_eq!(slice_cell.len(), 3);
/// ```
#[unstable(feature = "as_cell", issue="43038")]
#[stable(feature = "as_cell", since = "1.37.0")]
pub fn as_slice_of_cells(&self) -> &[Cell<T>] {
unsafe {
&*(self as *const Cell<[T]> as *const [Cell<T>])

1
src/test/run-pass/rfcs/rfc-1789-as-cell/from-mut.rs
View file

@ -1,5 +1,4 @@
// run-pass
#![feature(as_cell)]
use std::cell::Cell;