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Impl AsRef, Borrow for Ref, RefMut #101981

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Impl AsRef, Borrow for Ref, RefMut #101981

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0cca56b
Impl AsRef, Borrow for Ref, RefMut
dhardy Sep 18, 2022
4754dcc
Add AsMut, BorrowMut for RefMut
dhardy Sep 19, 2022
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48 changes: 48 additions & 0 deletions library/core/src/cell.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1342,6 +1342,22 @@ impl<T: ?Sized> Deref for Ref<'_, T> {
}
}

#[stable(feature = "borrow_ref", since = "1.65.0")]
impl<T: ?Sized> crate::convert::AsRef<T> for Ref<'_, T> {
#[inline]
fn as_ref(&self) -> &T {
self
}
}

#[stable(feature = "borrow_ref", since = "1.65.0")]
impl<T: ?Sized> crate::borrow::Borrow<T> for Ref<'_, T> {
#[inline]
fn borrow(&self) -> &T {
self
}
}

impl<'b, T: ?Sized> Ref<'b, T> {
/// Copies a `Ref`.
///
Expand Down Expand Up @@ -1733,6 +1749,38 @@ impl<T: ?Sized> DerefMut for RefMut<'_, T> {
}
}

#[stable(feature = "borrow_ref", since = "1.65.0")]
impl<T: ?Sized> crate::convert::AsRef<T> for RefMut<'_, T> {
#[inline]
fn as_ref(&self) -> &T {
self
}
}

#[stable(feature = "borrow_ref", since = "1.65.0")]
impl<T: ?Sized> crate::convert::AsMut<T> for RefMut<'_, T> {
#[inline]
fn as_mut(&mut self) -> &mut T {
self
}
}

#[stable(feature = "borrow_ref", since = "1.65.0")]
impl<T: ?Sized> crate::borrow::Borrow<T> for RefMut<'_, T> {
#[inline]
fn borrow(&self) -> &T {
self
}
}

#[stable(feature = "borrow_ref", since = "1.65.0")]
impl<T: ?Sized> crate::borrow::BorrowMut<T> for RefMut<'_, T> {
#[inline]
fn borrow_mut(&mut self) -> &mut T {
self
}
}

#[unstable(feature = "coerce_unsized", issue = "27732")]
impl<'b, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<RefMut<'b, U>> for RefMut<'b, T> {}

Expand Down