Trait Nullable

pub trait Nullable:
    AnchorSerialize
    + AnchorDeserialize
    + PartialEq {
    const NONE: Self;

    // Provided methods
    fn is_some(&self) -> bool { ... }
    fn is_none(&self) -> bool { ... }
}

Used for Borsh types that can have a None value.

Required Associated Constants

const NONE: Self

The value that represents None.

Provided Methods

fn is_some(&self) -> bool

Indicates if the value is Some.

fn is_none(&self) -> bool

Indicates if the value is None.

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 Nullable for u8

const NONE: Self = 0u8

impl Nullable for u16

const NONE: Self = 0u16

impl Nullable for u32

const NONE: Self = 0u32

impl Nullable for u64

const NONE: Self = 0u64

impl Nullable for u128

const NONE: Self = 0u128

impl Nullable for usize

const NONE: Self = 0usize

impl Nullable for Pubkey

const NONE: Self = DEFAULT_PUBKEY

Implementors