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implement ptr.addr() via transmute #97710

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Merged
merged 1 commit into from
Jun 6, 2022
Merged

implement ptr.addr() via transmute #97710

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4 changes: 3 additions & 1 deletion library/core/src/ptr/const_ptr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -180,7 +180,9 @@ impl<T: ?Sized> *const T {
T: Sized,
{
// FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
self as usize
// SAFETY: Pointer-to-integer transmutes are valid (if you are okay with losing the
// provenance).
unsafe { mem::transmute(self) }
}

/// Gets the "address" portion of the pointer, and 'exposes' the "provenance" part for future
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4 changes: 3 additions & 1 deletion library/core/src/ptr/mut_ptr.rs
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Expand Up @@ -184,7 +184,9 @@ impl<T: ?Sized> *mut T {
T: Sized,
{
// FIXME(strict_provenance_magic): I am magic and should be a compiler intrinsic.
self as usize
// SAFETY: Pointer-to-integer transmutes are valid (if you are okay with losing the
// provenance).
unsafe { mem::transmute(self) }
}

/// Gets the "address" portion of the pointer, and 'exposes' the "provenance" part for future
Expand Down