Trait design_pattern_examples_rust::observer::observer_inumberchanged_trait::IObserverNumberChanged

source · 
pub trait IObserverNumberChanged {
    // Required method
    fn notify(&mut self, updated_number: u32);
}
Expand description

Represents an observer to the ObserverNumberProducer struct. An observer implements this trait and then subscribes to the ObserverNumberProducer struct with the trait. The observer will be called whenever a change in the number is made.

This trait is specific to the ObserverNumberProducer struct example, which is a typical requirement for a subject that supports observers.

Required Methods§

source

fn notify(&mut self, updated_number: u32)

This is called whenever the number in the ObserverNumberProducer object is changed.

Parameters
  • The updated number the observer is being told about.

Implementors§