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Lift T: Sized bounds from some strict_provenance pointer methods

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Maybe Waffle 2022-10-28 23:27:28 +04:00
parent 44fcfb0a96
commit 1f34e11d1b
2 changed files with 12 additions and 36 deletions
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24
library/core/src/ptr/const_ptr.rs
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@ -178,14 +178,11 @@ impl<T: ?Sized> *const T {
#[must_use]
#[inline]
#[unstable(feature = "strict_provenance", issue = "95228")]
pub fn addr(self) -> usize
where
T: Sized,
{
pub fn addr(self) -> usize {
// FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
// SAFETY: Pointer-to-integer transmutes are valid (if you are okay with losing the
// provenance).
unsafe { mem::transmute(self) }
unsafe { mem::transmute(self.cast::<()>()) }
}
/// Gets the "address" portion of the pointer, and 'exposes' the "provenance" part for future
@ -215,12 +212,9 @@ impl<T: ?Sized> *const T {
#[must_use]
#[inline]
#[unstable(feature = "strict_provenance", issue = "95228")]
pub fn expose_addr(self) -> usize
where
T: Sized,
{
pub fn expose_addr(self) -> usize {
// FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
self as usize
self.cast::<()>() as usize
}
/// Creates a new pointer with the given address.
@ -238,10 +232,7 @@ impl<T: ?Sized> *const T {
#[must_use]
#[inline]
#[unstable(feature = "strict_provenance", issue = "95228")]
pub fn with_addr(self, addr: usize) -> Self
where
T: Sized,
{
pub fn with_addr(self, addr: usize) -> Self {
// FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
//
// In the mean-time, this operation is defined to be "as if" it was
@ -264,10 +255,7 @@ impl<T: ?Sized> *const T {
#[must_use]
#[inline]
#[unstable(feature = "strict_provenance", issue = "95228")]
pub fn map_addr(self, f: impl FnOnce(usize) -> usize) -> Self
where
T: Sized,
{
pub fn map_addr(self, f: impl FnOnce(usize) -> usize) -> Self {
self.with_addr(f(self.addr()))
}