Struct revent::Slot

pub struct Slot<T: ?Sized> { /* fields omitted */ }

Container for a single optional Node.

Useful for providing a container that may be empty. If the item is always supposed to exist then using Node directly is more useful.

use revent::{Node, Slot};

let mut slot = Slot::new();

slot.insert(Node::new(123));

let result: i32 = slot.emit(|x| {
    println!("{}", x);
    *x + 1
});

println!("{}", result);

Implementations

impl<T: ?Sized> Slot<T>

pub fn new() -> Self

Create a new slot.

pub fn new_with_trace(trace: impl Fn(usize) + 'static) -> Self

Create a new channel with a trace object.

pub fn insert(&mut self, item: Node<T>)

Insert a node into this slot.

Panics

Panics if there already exists a node in this slot.

pub fn remove(&mut self) -> Node<T>

Remove the currently held node from this slot.

Panics

Panics if there exists no node in this slot.

pub fn emit<R>(&self, handler: impl FnOnce(&mut T) -> R) -> R

Apply a function to the node in this slot.

Panics

Panics if there exists no node in this slot.

Trait Implementations

impl<T: ?Sized> Default for Slot<T>

fn default() -> Self

Returns the "default value" for a type.