Trait ChangeListener 

pub trait ChangeListener: Send + Sync {
    // Required method
    fn changed(&self, change: Change);
}

Available on crate feature std only.

Woken, without a value, after a source it subscribed to changed.

The source calls it synchronously from whatever changed it, possibly under the source’s own locks: only wake, never block or call into the source.

Required Methods

fn changed(&self, change: Change)

The source changed.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl ChangeListener for Notify

Wakes the tasks waiting at this moment, as [Notify::notify_waiters].

fn changed(&self, _: Change)

Implementors

impl ChangeListener for ChangeWaiter