38fad984c6
Use `std::mem::{size_of, size_of_val, align_of, align_of_val}` from the
prelude instead of importing or qualifying them.
These functions were added to all preludes in Rust 1.80.
31 lines
854 B
Rust
31 lines
854 B
Rust
use std::ptr::Alignment;
|
|
|
|
/// Returns the ABI-required minimum alignment of a type in bytes.
|
|
///
|
|
/// This is equivalent to [`align_of`], but also works for some unsized
|
|
/// types (e.g. slices or rustc's `List`s).
|
|
pub const fn align_of<T: ?Sized + Aligned>() -> Alignment {
|
|
T::ALIGN
|
|
}
|
|
|
|
/// A type with a statically known alignment.
|
|
///
|
|
/// # Safety
|
|
///
|
|
/// `Self::ALIGN` must be equal to the alignment of `Self`. For sized types it
|
|
/// is [`align_of::<Self>()`], for unsized types it depends on the type, for
|
|
/// example `[T]` has alignment of `T`.
|
|
///
|
|
/// [`align_of::<Self>()`]: align_of
|
|
pub unsafe trait Aligned {
|
|
/// Alignment of `Self`.
|
|
const ALIGN: Alignment;
|
|
}
|
|
|
|
unsafe impl<T> Aligned for T {
|
|
const ALIGN: Alignment = Alignment::of::<Self>();
|
|
}
|
|
|
|
unsafe impl<T> Aligned for [T] {
|
|
const ALIGN: Alignment = Alignment::of::<T>();
|
|
}
|