Struct DVar 

pub struct DVar<'c, S, T, GetFn: Fn(&S) -> &T, SetFn: Fn(&S, T) -> S> { /* private fields */ }

View and mutate a part of a Var.

Implementations

impl<'c, S, T, GetFn: Fn(&S) -> &T, SetFn: Fn(&S, T) -> S> DVar<'c, S, T, GetFn, SetFn>

pub fn get<'a>(&self, c: impl RxContext<'a, 'c>) -> &'a T

where S: 'a, 'c: 'a,

Read the part of the variable this view gets.

pub fn set<'a>(&self, c: impl MutRxContext<'a, 'c>, value: T)

where S: 'a, 'c: 'a,

Write a new value to the part of the variable this view gets.

Do know that this uses the most recently-set value even if the graph hasn’t been recomputed. This means you can create multiple derives and set them all before recompute, and you don’t have to worry about the later derived values setting their part on the stale whole.

Trait Implementations

impl<'c, S: Debug, T: Debug, GetFn: Debug + Fn(&S) -> &T, SetFn: Debug + Fn(&S, T) -> S> Debug for DVar<'c, S, T, GetFn, SetFn>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.