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added missing refcell ref/refmut coercions to unsized

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This commit is contained in:
Валерий Лашманов 2016-03-31 10:11:59 -04:00
parent 102a5be712
commit 33db2d65ff
2 changed files with 28 additions and 2 deletions
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10
src/libcore/cell.rs
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@ -147,8 +147,8 @@
use clone::Clone;
use cmp::{PartialEq, Eq};
use default::Default;
use marker::{Copy, Send, Sync, Sized};
use ops::{Deref, DerefMut, Drop, FnOnce};
use marker::{Copy, Send, Sync, Sized, Unsize};
use ops::{Deref, DerefMut, Drop, FnOnce, CoerceUnsized};
use option::Option;
use option::Option::{None, Some};
@ -638,6 +638,9 @@ impl<'b, T: ?Sized> Ref<'b, T> {
}
}
#[unstable(feature = "coerce_unsized", issue = "27732")]
impl<'b, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Ref<'b, U>> for Ref<'b, T> {}
impl<'b, T: ?Sized> RefMut<'b, T> {
/// Make a new `RefMut` for a component of the borrowed data, e.g. an enum
/// variant.
@ -770,6 +773,9 @@ impl<'b, T: ?Sized> DerefMut for RefMut<'b, T> {
}
}
#[unstable(feature = "coerce_unsized", issue = "27732")]
impl<'b, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<RefMut<'b, U>> for RefMut<'b, T> {}
/// The core primitive for interior mutability in Rust.
///
/// `UnsafeCell<T>` is a type that wraps some `T` and indicates unsafe interior operations on the