Trait Nullable 

pub trait Nullable {
    const NULL: Self;

    // Required method
    fn is_null(&self) -> bool;
}

A trait for defining nullable values.

Required Associated Constants

const NULL: Self

The null value for the type.

Required Methods

fn is_null(&self) -> bool

Returns true if the value is null. Typically, this is a comparison with the null value.

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<T> Nullable for Option<T>

const NULL: Self = None

fn is_null(&self) -> bool

impl<T> Nullable for *const T

const NULL: Self

fn is_null(&self) -> bool

impl<T> Nullable for *mut T

const NULL: Self

fn is_null(&self) -> bool

Implementors