Struct freya::prelude::Write

pub struct Write<'a, T, S = UnsyncStorage>
where
    T: 'static + ?Sized,
    S: AnyStorage,
{ /* private fields */ }

A mutable reference to a signal’s value.

T is the current type of the write S is the storage type of the signal

Implementations

impl<'a, T, S> Write<'a, T, S>

where T: 'static + ?Sized, S: AnyStorage,

pub fn map<O>( myself: Write<'a, T, S>, f: impl FnOnce(&mut T) -> &mut O, ) -> Write<'a, O, S>

where O: ?Sized,

Map the mutable reference to the signal’s value to a new type.

pub fn filter_map<O>( myself: Write<'a, T, S>, f: impl FnOnce(&mut T) -> Option<&mut O>, ) -> Option<Write<'a, O, S>>

where O: ?Sized,

Try to map the mutable reference to the signal’s value to a new type

pub fn downcast_lifetime<'b>(mut_: Write<'a, T, S>) -> Write<'b, T, S>

where 'a: 'b,

Downcast the lifetime of the mutable reference to the signal’s value.

This function enforces the variance of the lifetime parameter 'a in Mut. Rust will typically infer this cast with a concrete type, but it cannot with a generic type.

Trait Implementations

impl<T, S> Deref for Write<'_, T, S>

where T: 'static + ?Sized, S: AnyStorage,

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &<Write<'_, T, S> as Deref>::Target

Dereferences the value.

impl<T, S> DerefMut for Write<'_, T, S>

where S: AnyStorage, T: ?Sized,

fn deref_mut(&mut self) -> &mut <Write<'_, T, S> as Deref>::Target

Mutably dereferences the value.