Enum Nullable 

pub enum Nullable<T> {
    Null,
    Value(T),
}

A value that may be explicitly null on the wire (Matter quality X).

Distinct from Option: Option<T> models an optional element (its tag is absent entirely), whereas Nullable<T> models a present element whose TLV value is the null type. A field that is both optional and nullable is Option<Nullable<T>>.

Variants

Null

The wire carried an explicit TLV null.

Value(T)

The wire carried a concrete value.

Implementations

impl<T> Nullable<T>

pub fn value(self) -> Option<T>

Returns the contained value, or None if null.

pub fn is_null(&self) -> bool

Returns true if this is Nullable::Null.

Trait Implementations

impl<T: Clone> Clone for Nullable<T>

fn clone(&self) -> Nullable<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Copy> Copy for Nullable<T>

impl<T: Debug> Debug for Nullable<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Eq> Eq for Nullable<T>

impl<T> From<Option<T>> for Nullable<T>

fn from(o: Option<T>) -> Self

Converts to this type from the input type.

impl<T: PartialEq> PartialEq for Nullable<T>

fn eq(&self, other: &Nullable<T>) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<T: PartialEq> StructuralPartialEq for Nullable<T>