Trait Access 

pub trait Access<T> {
    const IS_ABSENT: bool;

    // Required methods
    fn get(&self) -> Option<&T>;
    fn get_mut(&mut self) -> Option<&mut T>;
}

Uniform field access for Present, Optional, or Absent.

Required Associated Constants

const IS_ABSENT: bool

Compile-time constant indicating if this field is absent.

Required Methods

fn get(&self) -> Option<&T>

Get field reference if present.

fn get_mut(&mut self) -> Option<&mut T>

Get mutable field reference if present.

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> Access<T> for Option<T>

const IS_ABSENT: bool = false

fn get(&self) -> Option<&T>

fn get_mut(&mut self) -> Option<&mut T>

impl<T> Access<T> for PhantomData<T>

const IS_ABSENT: bool = true

fn get(&self) -> Option<&T>

fn get_mut(&mut self) -> Option<&mut T>

Implementors

impl<T: Sized> Access<T> for T

const IS_ABSENT: bool = false