Struct HandlerMut 

pub struct HandlerMut<'a, T>(/* private fields */);

HandlerMut is a type representing an optional event handler, commonly used for component properties.

Any function that takes a single argument and returns () can be converted into a HandlerMut, and it can be invoked using function call syntax.

Implementations

impl<T> HandlerMut<'_, T>

pub fn is_default(&self) -> bool

Returns true if the handler was default-initialized.

pub fn take(&mut self) -> Self

Takes the handler, leaving a default-initialized handler in its place.

Trait Implementations

impl<T> Default for HandlerMut<'_, T>

fn default() -> Self

Returns the “default value” for a type.

impl<'a, T: 'a> Deref for HandlerMut<'a, T>

type Target = dyn FnMut(T) + Send + Sync + 'a

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, T: 'a> DerefMut for HandlerMut<'a, T>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl<'a, T, F> From<F> for HandlerMut<'a, T>

where F: FnMut(T) + Send + Sync + 'a,

fn from(f: F) -> Self

Converts to this type from the input type.

impl<T: Clone + Send + Sync + 'static> From<Handler<T>> for HandlerMut<'static, T>

fn from(handler: Handler<T>) -> Self

Converts to this type from the input type.