{
  "$type": "site.standard.document",
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  "path": "/t/idea-pre-rfc-null-free-pointer-and-zeroable-reference/23991?page=5#post_92",
  "publishedAt": "2026-03-07T05:57:18.000Z",
  "site": "https://internals.rust-lang.org",
  "textContent": "jhpratt:\n\n> Abstractions can be made to be zero cost.\n\nThey do have cost. `volatile` access is not optimisable by its definition and inline asm is even worse - it will cause audit failure. And forming reference at 0x0 is not a cost problem, it's simply impossible under the current AM. There's nothing 'zero-cost'.",
  "title": "Idea / Pre-RFC: Null-free pointer and Zeroable reference"
}