Struct Nullable 

pub struct Nullable<T: ObjectType>(pub Option<Ref<T>>);

An optional object reference accepted by setters, convertible from a handle (or a borrowed handle) of any derived class and from None.

Tuple Fields

0: Option<Ref<T>>

Trait Implementations

impl<T: ObjectType + Upcast<U>, U: ObjectType> From<&Ref<T>> for Nullable<U>

fn from(value: &Ref<T>) -> Self

Converts to this type from the input type.

impl<U: ObjectType> From<Option<Ref<U>>> for Nullable<U>

fn from(value: Option<Ref<U>>) -> Self

Converts to this type from the input type.

impl<T: ObjectType + Upcast<U>, U: ObjectType> From<Ref<T>> for Nullable<U>

fn from(value: Ref<T>) -> Self

Converts to this type from the input type.