pub const fn without_provenance<T>(addr: usize) -> *const T🔬This is a nightly-only experimental API. (
strict_provenance #95228)Expand description
Creates a pointer with the given address and no provenance.
This is equivalent to ptr::null().with_addr(addr).
Without provenance, this pointer is not associated with any actual allocation. Such a
no-provenance pointer may be used for zero-sized memory accesses (if suitably aligned), but
non-zero-sized memory accesses with a no-provenance pointer are UB. No-provenance pointers are
little more than a usize address in disguise.
This is different from addr as *const T, which creates a pointer that picks up a previously
exposed provenance. See with_exposed_provenance for more details on that operation.
This API and its claimed semantics are part of the Strict Provenance experiment, see the module documentation for details.