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Rollup merge of #52674 - tinaun:patch-2, r=cramertj 

Impl Executor for Box<E: Executor>

removes the need for the compatibility lib between futures 0.1 and 0.3 to use a wrapper type to implement Executor for Box<Executor>
This commit is contained in:
Mark Rousskov 2018-07-26 09:18:34 -06:00 committed by GitHub
parent 007177c445 75d22263c9
commit 7c09bab986
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1 changed files with 14 additions and 1 deletions
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15
src/liballoc/boxed.rs
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@ -67,7 +67,7 @@ use core::marker::{Unpin, Unsize};
use core::mem::{self, PinMut};
use core::ops::{CoerceUnsized, Deref, DerefMut, Generator, GeneratorState};
use core::ptr::{self, NonNull, Unique};
use core::task::{Context, Poll};
use core::task::{Context, Poll, Executor, SpawnErrorKind, SpawnObjError};
use raw_vec::RawVec;
use str::from_boxed_utf8_unchecked;
@ -972,6 +972,19 @@ unsafe impl<'a, T, F> UnsafeFutureObj<'a, T> for PinBox<F>
}
}
#[unstable(feature = "futures_api", issue = "50547")]
impl<E> Executor for Box<E>
where E: Executor + ?Sized
{
fn spawn_obj(&mut self, task: FutureObj<'static, ()>) -> Result<(), SpawnObjError> {
(**self).spawn_obj(task)
}
fn status(&self) -> Result<(), SpawnErrorKind> {
(**self).status()
}
}
#[unstable(feature = "futures_api", issue = "50547")]
impl<'a, F: Future<Output = ()> + Send + 'a> From<PinBox<F>> for FutureObj<'a, ()> {
fn from(boxed: PinBox<F>) -> Self {