Struct FunctionComputed

pub struct FunctionComputed<T, F, C> { /* private fields */ }

A computed T which is produced by some function F.

Created by the ComputedVar::new function or computed macro.

Implementations

impl<T, F, C> FunctionComputed<T, F, C>

where F: FnMut(&mut C) -> T,

pub fn new(func: F) -> Self

Creates the computed T.

Trait Implementations

impl<T, F, C> ComputedValue for FunctionComputed<T, F, C>

where F: FnMut(&mut C) -> T,

type Value = T

The value visible within the ComputedVar.

type Context = C

The context used by the update function.

fn update(&mut self, ctx: &mut C, _comp: &ComputationHandle)

Recompute the value of this item.

fn read(&self) -> &T

Cheaply get a reference to the value of this item. This function is free to panic if update has never been called.