diff options
Diffstat (limited to 'src/liballoc/boxed.rs')
| -rw-r--r-- | src/liballoc/boxed.rs | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs index f989e701913..63b262d1f3d 100644 --- a/src/liballoc/boxed.rs +++ b/src/liballoc/boxed.rs @@ -73,14 +73,15 @@ use core::convert::From; use core::fmt; use core::future::Future; use core::hash::{Hash, Hasher}; -use core::iter::FusedIterator; +use core::iter::{Iterator, FromIterator, FusedIterator}; use core::marker::{Unpin, Unsize}; use core::mem; use core::pin::Pin; -use core::ops::{CoerceUnsized, Deref, DerefMut, Generator, GeneratorState}; +use core::ops::{CoerceUnsized, DispatchFromDyn, Deref, DerefMut, Generator, GeneratorState}; use core::ptr::{self, NonNull, Unique}; use core::task::{LocalWaker, Poll}; +use vec::Vec; use raw_vec::RawVec; use str::from_boxed_utf8_unchecked; @@ -696,6 +697,16 @@ impl<'a, A, R> FnOnce<A> for Box<dyn FnBox<A, Output = R> + Send + 'a> { #[unstable(feature = "coerce_unsized", issue = "27732")] impl<T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<Box<U>> for Box<T> {} +#[unstable(feature = "dispatch_from_dyn", issue = "0")] +impl<T: ?Sized + Unsize<U>, U: ?Sized> DispatchFromDyn<Box<U>> for Box<T> {} + +#[stable(feature = "boxed_slice_from_iter", since = "1.32.0")] +impl<A> FromIterator<A> for Box<[A]> { + fn from_iter<T: IntoIterator<Item = A>>(iter: T) -> Self { + iter.into_iter().collect::<Vec<_>>().into_boxed_slice() + } +} + #[stable(feature = "box_slice_clone", since = "1.3.0")] impl<T: Clone> Clone for Box<[T]> { fn clone(&self) -> Self { |