Trait Packable 

pub unsafe trait Packable: Copy {
    const MAX_BITS: usize = _;

    // Required methods
    fn pack(self) -> usize;
    unsafe fn unpack(value: usize) -> Self;
}

A type that can be packed into a pointer.

Safety

This trait is unsafe because it has certain requirements that must be upheld by the implementor:

• unpack(pack(x)) == x for all x.
• MAX_BITS must be the maximum number of bits that are returned by pack.
• pack and unpack must be infallible.

Provided Associated Constants

const MAX_BITS: usize = _

The maximum number of bits of the output of pack.

Required Methods

fn pack(self) -> usize

Packs a value into an integer.

Safety

The value returned by this function must be entirely contained within the lower MAX_BITS bits of the returned integer. The remaining upper bits MUST be zero.

unsafe fn unpack(value: usize) -> Self

Unpacks a value from an integer previously packed by pack.

Safety

value MUST have been previously returned by pack. Implementors can assume that this is the case.

Implementors MUST ensure that the returned value is identical to the value that was passed to pack. In other words, unpack(pack(x)) == x for all x.

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 Packable for bool

const MAX_BITS: usize = 1usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for i8

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for i16

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for i32

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for isize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for u8

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for u16

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for u32

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl Packable for ()

fn pack(self) -> usize

unsafe fn unpack(_: usize) -> Self

impl Packable for usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable> Packable for (T0,)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable> Packable for (T0, T1)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable> Packable for (T0, T1, T2)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable, T3: Packable> Packable for (T0, T1, T2, T3)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable, T3: Packable, T4: Packable> Packable for (T0, T1, T2, T3, T4)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable, T3: Packable, T4: Packable, T5: Packable> Packable for (T0, T1, T2, T3, T4, T5)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable, T3: Packable, T4: Packable, T5: Packable, T6: Packable> Packable for (T0, T1, T2, T3, T4, T5, T6)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable, T3: Packable, T4: Packable, T5: Packable, T6: Packable, T7: Packable> Packable for (T0, T1, T2, T3, T4, T5, T6, T7)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable, T3: Packable, T4: Packable, T5: Packable, T6: Packable, T7: Packable, T8: Packable> Packable for (T0, T1, T2, T3, T4, T5, T6, T7, T8)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T0: Packable, T1: Packable, T2: Packable, T3: Packable, T4: Packable, T5: Packable, T6: Packable, T7: Packable, T8: Packable, T9: Packable> Packable for (T0, T1, T2, T3, T4, T5, T6, T7, T8, T9)

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T: Packable> Packable for Option<T>

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T: Packable, E: Packable> Packable for Result<T, E>

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

impl<T: Packable, const N: usize> Packable for [T; N]

const MAX_BITS: usize

fn pack(self) -> usize

unsafe fn unpack(value: usize) -> Self

Implementors