Struct drying_paint::WatchedCellCore

pub struct WatchedCellCore<'ctx, T: ?Sized, O: ?Sized = DefaultOwner> { /* private fields */ }

A Watched value which provides interior mutability. This provides correct behavior (triggering watch functions when changed) where Watched<Cell<T>> would not, and should be slightly more performant than RefCell<Watched<T>>.

Implementations

impl<'ctx, T: ?Sized, O: ?Sized> WatchedCellCore<'ctx, T, O>

pub fn get_mut(&mut self, ctx: WatchArg<'_, 'ctx, O>) -> &mut T

Returns a mutable reference to the watched data.

This call borrows the WatchedCell mutably (at compile-time) which guarantees that we possess the only reference.

pub fn get_mut_external(&mut self) -> &mut T

pub fn watched(&self, ctx: WatchArg<'_, 'ctx, O>)

Treat this WatchedCell as watched, without fetching the actual value.

impl<'ctx, T, O: ?Sized> WatchedCellCore<'ctx, T, O>

pub fn new(value: T) -> Self

Create a new WatchedCell

pub fn into_inner(self) -> T

Unwraps the WatchedCell, returning the contained value

pub fn get(&self, ctx: WatchArg<'_, 'ctx, O>) -> T

where T: Copy,

Returns a copy of the watched value

pub fn get_unwatched(&self) -> T

where T: Copy,

pub fn set(&self, value: T, ctx: WatchArg<'_, 'ctx, O>)

Sets the watched value

pub fn set_external(&self, value: T)

pub fn replace(&self, value: T, ctx: WatchArg<'_, 'ctx, O>) -> T

Replaces the contained value and returns the previous value

pub fn replace_external(&self, value: T) -> T

pub fn take(&self, ctx: WatchArg<'_, 'ctx, O>) -> T

where T: Default,

Takes the watched value, leaving Default::default() in its place

pub fn take_external(&self) -> T

where T: Default,

pub fn set_if_neq(&self, value: T, ctx: WatchArg<'_, 'ctx, O>)

where T: Copy + PartialEq,

pub fn set_if_neq_external(&self, value: T)

where T: Copy + PartialEq,

impl<T: ?Sized> WatchedCellCore<'static, T, DefaultOwner>

pub fn get_auto(&self) -> T

where T: Sized + Copy,

pub fn get_mut_auto(&mut self) -> &mut T

pub fn watched_auto(&self)

pub fn set_auto(&self, value: T)

where T: Sized,

pub fn replace_auto(&self, value: T) -> T

where T: Sized,

pub fn take_auto(&self) -> T

where T: Default,

pub fn set_if_neq_auto(&self, value: T)

where T: Copy + PartialEq,

Trait Implementations

impl<'ctx, T: Default, O: ?Sized> Default for WatchedCellCore<'ctx, T, O>

fn default() -> Self

Returns the “default value” for a type.

impl<'ctx, T, O: ?Sized> From<T> for WatchedCellCore<'ctx, T, O>

fn from(value: T) -> Self

Converts to this type from the input type.

impl<'a, 'ctx, O, T> WatchedValueCore<'ctx, O> for &'a WatchedCellCore<'ctx, T, O>

where O: ?Sized, T: ?Sized + Copy,

type Value = T

fn get(self, ctx: WatchArg<'_, 'ctx, O>) -> Self::Value

fn get_unwatched(self) -> Self::Value

fn map<F, U>(self, map_fn: F) -> impl WatchedValueCore<'ctx, O, Value = U>

where Self: Sized, F: FnOnce(Self::Value) -> U,