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Update reference safety requirements #125021

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Merged
merged 2 commits into from
May 12, 2024
Merged

Update reference safety requirements #125021

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1cefaa7
Relax slice safety requirements
joshlf May 11, 2024
15df3d7
References must also be non-null
joshlf May 11, 2024
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3 changes: 2 additions & 1 deletion library/core/src/primitive_docs.rs
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Expand Up @@ -1467,8 +1467,9 @@ mod prim_usize {}
/// For all types, `T: ?Sized`, and for all `t: &T` or `t: &mut T`, when such values cross an API
/// boundary, the following invariants must generally be upheld:
///
/// * `t` is non-null
/// * `t` is aligned to `align_of_val(t)`
/// * `t` is dereferenceable for `size_of_val(t)` many bytes
/// * if `size_of_val(t) > 0`, then `t` is dereferenceable for `size_of_val(t)` many bytes
///
/// If `t` points at address `a`, being "dereferenceable" for N bytes means that the memory range
/// `[a, a + N)` is all contained within a single [allocated object].
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