[−][src]Struct futures_core::stream::LocalStreamObj
A custom trait object for polling streams, roughly akin to
Box<dyn Stream<Item = T> + 'a>.
This custom trait object was introduced for two reasons:
- Currently it is not possible to take
dyn Traitby value andBox<dyn Trait>is not available in no_std contexts. - The
Streamtrait is currently not object safe: TheStream::poll_nextmethod makes uses the arbitrary self types feature and traits in which this feature is used are currently not object safe due to current compiler limitations. (See tracking issue for arbitrary self types for more information #44874)
Methods
impl<'a, T> LocalStreamObj<'a, T>[src]
impl<'a, T> LocalStreamObj<'a, T>pub fn new<F: UnsafeStreamObj<'a, T> + 'a>(f: F) -> LocalStreamObj<'a, T>[src]
pub fn new<F: UnsafeStreamObj<'a, T> + 'a>(f: F) -> LocalStreamObj<'a, T>Create a LocalStreamObj from a custom trait object representation.
pub unsafe fn into_stream_obj(self) -> StreamObj<'a, T>[src]
pub unsafe fn into_stream_obj(self) -> StreamObj<'a, T>Converts the LocalStreamObj into a StreamObj
To make this operation safe one has to ensure that the UnsafeStreamObj
instance from which this LocalStreamObj was created actually
implements Send.
Trait Implementations
impl<'a, T> Stream for LocalStreamObj<'a, T>[src]
impl<'a, T> Stream for LocalStreamObj<'a, T>type Item = T
Values yielded by the stream.
fn poll_next(self: Pin<&mut Self>, lw: &LocalWaker) -> Poll<Option<T>>[src]
fn poll_next(self: Pin<&mut Self>, lw: &LocalWaker) -> Poll<Option<T>>Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted. Read more
impl<'a, T> From<StreamObj<'a, T>> for LocalStreamObj<'a, T>[src]
impl<'a, T> From<StreamObj<'a, T>> for LocalStreamObj<'a, T>fn from(f: StreamObj<'a, T>) -> LocalStreamObj<'a, T>[src]
fn from(f: StreamObj<'a, T>) -> LocalStreamObj<'a, T>Performs the conversion.
impl<'a, F: Stream<Item = ()> + 'a> From<Pin<Box<F>>> for LocalStreamObj<'a, ()>[src]
impl<'a, F: Stream<Item = ()> + 'a> From<Pin<Box<F>>> for LocalStreamObj<'a, ()>impl<'a, F: Stream<Item = ()> + 'a> From<Box<F>> for LocalStreamObj<'a, ()>[src]
impl<'a, F: Stream<Item = ()> + 'a> From<Box<F>> for LocalStreamObj<'a, ()>impl<'a, T> Drop for LocalStreamObj<'a, T>[src]
impl<'a, T> Drop for LocalStreamObj<'a, T>impl<'a, T> Debug for LocalStreamObj<'a, T>[src]
impl<'a, T> Debug for LocalStreamObj<'a, T>fn fmt(&self, f: &mut Formatter) -> Result[src]
fn fmt(&self, f: &mut Formatter) -> ResultFormats the value using the given formatter. Read more
impl<'a, T> Unpin for LocalStreamObj<'a, T>[src]
impl<'a, T> Unpin for LocalStreamObj<'a, T>Auto Trait Implementations
impl<'a, T> !Send for LocalStreamObj<'a, T>
impl<'a, T> !Send for LocalStreamObj<'a, T>impl<'a, T> !Sync for LocalStreamObj<'a, T>
impl<'a, T> !Sync for LocalStreamObj<'a, T>Blanket Implementations
impl<S, T, E> TryStream for S where
S: Stream<Item = Result<T, E>>, [src]
impl<S, T, E> TryStream for S where
S: Stream<Item = Result<T, E>>, type Ok = T
The type of successful values yielded by this future
type Error = E
The type of failures yielded by this future
fn try_poll_next(
Pin<&mut S>,
&LocalWaker
) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>[src]
fn try_poll_next(
Pin<&mut S>,
&LocalWaker
) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>Poll this TryStream as if it were a Stream. Read more
impl<T, U> Into for T where
U: From<T>, [src]
impl<T, U> Into for T where
U: From<T>, impl<T> From for T[src]
impl<T> From for Timpl<T, U> TryFrom for T where
T: From<U>, [src]
impl<T, U> TryFrom for T where
T: From<U>, type Error = !
try_from)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>try_from)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized, [src]
impl<T> Borrow for T where
T: ?Sized, impl<T> Any for T where
T: 'static + ?Sized, [src]
impl<T> Any for T where
T: 'static + ?Sized, fn get_type_id(&self) -> TypeId[src]
fn get_type_id(&self) -> TypeId🔬 This is a nightly-only experimental API. (get_type_id)
this method will likely be replaced by an associated static
Gets the TypeId of self. Read more
impl<T> BorrowMut for T where
T: ?Sized, [src]
impl<T> BorrowMut for T where
T: ?Sized, fn borrow_mut(&mut self) -> &mut T[src]
fn borrow_mut(&mut self) -> &mut TMutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>, [src]
impl<T, U> TryInto for T where
U: TryFrom<T>,