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Remove P: Unpin bound on impl Future for Pin #81363

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merged 4 commits into from
Jul 29, 2021
Merged

Remove P: Unpin bound on impl Future for Pin #81363

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3b2b5b2
Remove P: Unpin bound on impl Future for Pin
jonhoo Jan 25, 2021
ac658e1
Merge branch 'master' into no-unpin-in-pin-future-impl
jonhoo May 27, 2021
b5e5a18
Update library/core/src/pin.rs
jonhoo Jun 16, 2021
cf40292
Link tracking issue for pin_deref_mut
jonhoo Jul 6, 2021
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Update library/core/src/pin.rs 
Co-authored-by: Ralf Jung <[email protected]>
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@jonhoo @RalfJung
jonhoo and RalfJung committed Jun 16, 2021
commit b5e5a182caa6efb7359978a6ff596f403cb4c099
2 changes: 1 addition & 1 deletion library/core/src/pin.rs
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Expand Up @@ -808,7 +808,7 @@ impl<'a, P: DerefMut> Pin<&'a mut Pin<P>> {
/// This is a generic method to go from `Pin<&mut Pin<Pointer<T>>>` to `Pin<&mut T>`. It is
/// safe because the existence of a `Pin<Pointer<T>>` ensures that the pointee, `T`, cannot
/// move in the future, and this method does not enable the pointee to move. "Malicious"
/// implementations of `Pointer::DerefMut` are likewise ruled out by the contract of
/// implementations of `P::DerefMut` are likewise ruled out by the contract of
/// `Pin::new_unchecked`.
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#[unstable(feature = "pin_deref_mut", issue = "none")]
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#[inline(always)]
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We generally use #[inline] and only use #[inline(always)] when really necessary.

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I used #[inline(always)] because that annotation is used on both as_mut and get_mut, and so it feels like the logic that applies there would apply here, but I could be wrong. Happy to change if preferred.

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