Trait FromBytes

pub unsafe trait FromBytes {
    const MIN_LAYOUT: Layout;

    // Provided methods
    fn from_bytes(bytes: &[u8]) -> &Self { ... }
    fn from_boxed(boxed: Box<[u8]>) -> Box<Self> { ... }
}

Marker trait for types that can be safely converted to bytes.

Required Associated Constants

const MIN_LAYOUT: Layout

Specified the minimum layout requirements for the allocation:

• is at least as big as MIN_LAYOUT.size()
• referenced/pointed data is at least as aligned as MIN_LAYOUT.align()

For DSTs, final size should be exactly the same as the allocation’s.

Safety

In Rust, it is considered UB for pointers/references/Box<T>es to be dangling, unaligned or pointing to invalid value.

The alignment check is done using MIN_LAYOUT and thus can cause UB if implemented incorrectly.

Provided Methods

fn from_bytes(bytes: &[u8]) -> &Self

fn from_boxed(boxed: Box<[u8]>) -> Box<Self>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl FromBytes for [u8]

const MIN_LAYOUT: Layout

fn from_bytes(bytes: &[u8]) -> &Self

fn from_boxed(boxed: Box<[u8]>) -> Box<Self>

impl FromBytes for [u16]

const MIN_LAYOUT: Layout

Implementors

impl<T> FromBytes for T

where T: Pod,

const MIN_LAYOUT: Layout

impl<T: BlobLayout> FromBytes for Blob<T>

const MIN_LAYOUT: Layout