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".

Implementations on Foreign Types

impl Nullable for Pubkey

const NONE: Self = DEFAULT_PUBKEY

impl Nullable for u8

const NONE: Self = 0

impl Nullable for u16

const NONE: Self = 0

impl Nullable for u32

const NONE: Self = 0

impl Nullable for u64

const NONE: Self = 0

impl Nullable for u128

const NONE: Self = 0

impl Nullable for usize

const NONE: Self = 0

Implementors