Struct WeakClient

pub struct WeakClient<S, R, E>(/* private fields */);

A weak client reference that can be upgraded to a Client as long as other Client objects till exist.

Implementations

impl<S, R, E> Weak<S, R, E>

pub fn upgrade(&self) -> Option<Client<S, R, E>>

Upgrade a WeakClient to a Client.

If no strong Client objects still exist then None is returned.

Examples

Upgrading a weak client while stong clients exists works:

use ump::{channel, Error};

let (server, client) = channel::<String, String, ()>();
let weak_client = client.weak();
let Some(client2) = weak_client.upgrade() else {
  panic!("Unable to upgrade weak client");
};

Upgrading a weak client when no stong clients exists fails:

use ump::{channel, Error};

let (server, client) = channel::<String, String, ()>();
let weak_client = client.weak();
drop(client);
let Some(_) = weak_client.upgrade() else {
  panic!("Unexpectedly able to upgrade weak client");
};

Trait Implementations

impl<S, R, E> Clone for Weak<S, R, E>

fn clone(&self) -> Weak<S, R, E>

Returns a copy of the value.

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

Performs copy-assignment from source.