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Make MaybeUninit::assume_init() a const fn #66579

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Make MaybeUninit::assume_init() a const fn #66579

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f5735d1
Make `MaybeUninit::assume_init()` a `const fn`
slightlyoutofphase Nov 20, 2019
bc764fd
Fix order of `unsafe` and `const`
slightlyoutofphase Nov 20, 2019
04e1681
I guess it's a different "intrinsics"?
slightlyoutofphase Nov 20, 2019
ad9fc61
Try something else...
slightlyoutofphase Nov 20, 2019
6b28ffe
Move #![feature(const_fn)] down the list, to see if it helps
slightlyoutofphase Nov 20, 2019
70fde32
Remove `crate::` prefix again as it can't possibly be necessary
slightlyoutofphase Nov 20, 2019
44f99a0
Put #![feature(const_fn)] back where it goes first
slightlyoutofphase Nov 20, 2019
68e1e77
Actually put it back properly.
slightlyoutofphase Nov 20, 2019
726a957
Add `rustc_const_unstable`, properly I hope.
slightlyoutofphase Nov 20, 2019
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3 changes: 2 additions & 1 deletion src/libcore/mem/maybe_uninit.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -482,7 +482,8 @@ impl<T> MaybeUninit<T> {
#[stable(feature = "maybe_uninit", since = "1.36.0")]
#[inline(always)]
#[cfg_attr(all(not(bootstrap)), rustc_diagnostic_item = "assume_init")]
pub unsafe fn assume_init(self) -> T {
#[rustc_const_unstable(feature = "const_assume_init")]
pub const unsafe fn assume_init(self) -> T {
intrinsics::panic_if_uninhabited::<T>();
ManuallyDrop::into_inner(self.value)
}
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