Trait KnownSize 

pub trait KnownSize {
    const MIN_SIZE: usize;
    const MIN_ALIGN: Alignment;

    // Required method
    fn size(p: *const Self) -> usize;
}

Trait to represent compile-time known size information.

This is a generalization of size_of that works for dynamically sized types.

Required Associated Constants

const MIN_SIZE: usize

Minimum size of this type known at compile-time.

const MIN_ALIGN: Alignment

Minimum alignment of this type known at compile-time.

Required Methods

fn size(p: *const Self) -> usize

Get the size of an object of this type in bytes, with the metadata of the given pointer.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<T> KnownSize for [T]

const MIN_SIZE: usize = 0

const MIN_ALIGN: Alignment

fn size(p: *const Self) -> usize

Implementors

impl<T> KnownSize for T

const MIN_SIZE: usize

const MIN_ALIGN: Alignment

impl<const SIZE: usize> KnownSize for Region<SIZE>

const MIN_SIZE: usize = SIZE

const MIN_ALIGN: Alignment