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Update pointer.md

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Joshua Liebow-Feeser 2023-08-28 15:48:33 -07:00 committed by GitHub
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@ -50,6 +50,12 @@ Raw pointers can be created directly using [`core::ptr::addr_of!`] for `*const`
The standard library contains additional 'smart pointer' types beyond references and raw pointers.
## Bit validity
Despite pointers and references being similar to `usize`s in the machine code emitted on most platforms,
the semantics of transmuting a reference or pointer type to a non-pointer type is currently undecided.
Thus, it may not be valid to transmute a pointer or reference type, `P`, to a `[u8; size_of::<P>()]`.
[`core::ptr::addr_of!`]: ../../core/ptr/macro.addr_of.html
[`core::ptr::addr_of_mut!`]: ../../core/ptr/macro.addr_of_mut.html
[Interior mutability]: ../interior-mutability.md