Trait LengthType 

pub trait LengthType:
    Copy
    + Default
    + PartialOrd {
    const SIZE: usize;

    // Required methods
    fn from_usize(value: usize) -> Option<Self>;
    fn to_usize(self) -> usize;
}

Trait for length types used in slice collections.

This trait defines the interface for length types that can be used to represent the length of string cows. Implementations are provided for u8, u16, u32, and u64.

Required Associated Constants

const SIZE: usize

Size of the length type in bytes.

Required Methods

fn from_usize(value: usize) -> Option<Self>

Convert a usize value to this length type.

Returns None if the value is too large to be represented by this length type.

fn to_usize(self) -> usize

Convert this length value to usize.

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 LengthType for u8

const SIZE: usize = 1usize

fn from_usize(value: usize) -> Option<Self>

fn to_usize(self) -> usize

impl LengthType for u16

const SIZE: usize = 2usize

fn from_usize(value: usize) -> Option<Self>

fn to_usize(self) -> usize

impl LengthType for u32

const SIZE: usize = 4usize

fn from_usize(value: usize) -> Option<Self>

fn to_usize(self) -> usize

impl LengthType for u64

const SIZE: usize = 8usize

fn from_usize(value: usize) -> Option<Self>

fn to_usize(self) -> usize

Implementors