Trait ic_stable_structures::storable::BoundedStorable

pub trait BoundedStorable: Storable {
    const MAX_SIZE: u32;
    const IS_FIXED_SIZE: bool;
}

A trait indicating that a Storable element is bounded in size.

Required Associated Constants

const MAX_SIZE: u32

The maximum size, in bytes, of the type when serialized.

const IS_FIXED_SIZE: bool

True if all the values of this type have fixed-width encoding. Some data structures, such as stable vector, can take advantage of fixed size to avoid storing an explicit entry size.

Examples: little-/big-endian encoding of u16/u32/u64, tuples and arrays of fixed-size types.

Implementations on Foreign Types

impl BoundedStorable for ()

const MAX_SIZE: u32 = 0u32

const IS_FIXED_SIZE: bool = false

impl BoundedStorable for u128

const MAX_SIZE: u32 = 16u32

const IS_FIXED_SIZE: bool = true

impl BoundedStorable for u64

const MAX_SIZE: u32 = 8u32

const IS_FIXED_SIZE: bool = true

impl BoundedStorable for u32

const MAX_SIZE: u32 = 4u32

const IS_FIXED_SIZE: bool = true

impl BoundedStorable for u16

const MAX_SIZE: u32 = 2u32

const IS_FIXED_SIZE: bool = true

impl BoundedStorable for u8

const MAX_SIZE: u32 = 1u32

const IS_FIXED_SIZE: bool = true

impl<const N: usize> BoundedStorable for [u8; N]

const MAX_SIZE: u32 = _

const IS_FIXED_SIZE: bool = true

impl<A, B> BoundedStorable for (A, B)where
    A: BoundedStorable + Default,
    B: BoundedStorable + Default,

const MAX_SIZE: u32 = _

const IS_FIXED_SIZE: bool = _

Implementors

impl<const N: usize> BoundedStorable for Blob<N>

const MAX_SIZE: u32 = _

const IS_FIXED_SIZE: bool = false