Struct AnyBinding 

pub struct AnyBinding<T>
where
    T: 'static,
{ /* private fields */ }

A type-erased Binding: what a piece stores when its builder takes impl Binding<T> (docs/api-style.md “Three input spellings”), so the piece itself needs no type parameter per bound value.

Copy, like Signal, so it captures into closures the same way: the erased binding lives in a slot owned by the reactive scope that created it, which is the scope building the piece. Reads and writes forward to the binding it wraps, preview and commit included.

Implementations

impl<T> AnyBinding<T>

where T: 'static,

pub fn new(binding: impl Binding<T>) -> AnyBinding<T>

Erase binding. Call it where the piece is built: the slot belongs to the current scope.

pub fn get(self) -> T

Tracked read.

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

Tracked read, or None once the scope that created the binding is disposed.

pub fn get_untracked(self) -> T

Untracked read.

pub fn with<R>(self, f: impl FnOnce(&T) -> R) -> R

Tracked read through a projection.

pub fn set(self, v: T)

Write, waking whatever tracks the binding.

pub fn set_if_changed(self, v: T)

where T: PartialEq,

Write only when the value differs from the current one.

pub fn update(self, f: impl FnOnce(&mut T))

Read the current value, let f change it, write it back.

Trait Implementations

impl<T> Binding<T> for AnyBinding<T>

where T: 'static,

fn read(&self) -> T

Tracked read: the current value, subscribing the running computation to changes.

fn peek(&self) -> T

Untracked read: the current value, subscribing nothing (the reactive world’s “peek”).

fn write(&self, v: T)

Write the value, waking whatever tracks it.

fn write_preview(&self, v: T)

A live write mid-gesture (Event::ValueChanged): readers must follow, but nothing durable should key off it. Defaults to Binding::write: a plain signal has no notion of “durable”, and a degraded backend that never commits stays correct.

fn write_commit(&self, v: T)

The settled value that ends a gesture (Event::ValueCommitted). Defaults to Binding::write; a day-model field seals its preview session here: one change record, one undo unit, one UPDATE for the whole drag.

fn write_teardown(&self, v: T)

Seal the last preview when its control is disposed. Persistent bindings default to committing; scope-owned signals have already received the preview and may be gone.

impl<T> Clone for AnyBinding<T>

where T: 'static,

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Copy for AnyBinding<T>

where T: 'static,