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Use generic NonZero everywhere in core.

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This commit is contained in:
Markus Reiter
2024-02-18 21:29:24 +01:00
parent 52dba5ffe7
commit 14ed426eec
10 changed files with 81 additions and 84 deletions
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9
library/core/src/primitive_docs.rs
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@@ -1577,8 +1577,7 @@ mod prim_ref {}
/// - Any two types with size 0 and alignment 1 are ABI-compatible.
/// - A `repr(transparent)` type `T` is ABI-compatible with its unique non-trivial field, i.e., the
/// unique field that doesn't have size 0 and alignment 1 (if there is such a field).
/// - `i32` is ABI-compatible with `NonZeroI32`, and similar for all other integer types with their
/// matching `NonZero*` type.
/// - `i32` is ABI-compatible with `NonZero<i32>`, and similar for all other integer types.
/// - If `T` is guaranteed to be subject to the [null pointer
/// optimization](option/index.html#representation), then `T` and `Option<T>` are ABI-compatible.
///
@@ -1613,9 +1612,9 @@ mod prim_ref {}
/// type in the function pointer to the type at the function declaration, and the return value is
/// [`transmute`d][mem::transmute] from the type in the declaration to the type in the
/// pointer. All the usual caveats and concerns around transmutation apply; for instance, if the
/// function expects a `NonZeroI32` and the function pointer uses the ABI-compatible type
/// `Option<NonZeroI32>`, and the value used for the argument is `None`, then this call is Undefined
/// Behavior since transmuting `None::<NonZeroI32>` to `NonZeroI32` violates the non-zero
/// function expects a `NonZero<i32>` and the function pointer uses the ABI-compatible type
/// `Option<NonZero<i32>>`, and the value used for the argument is `None`, then this call is Undefined
/// Behavior since transmuting `None::<NonZero<i32>>` to `NonZero<i32>` violates the non-zero
/// requirement.
///
/// #### Requirements concerning target features