shrev 0.3.2

A pull based event handler, with events stored in a ring buffer, meant to be used as a resource in specs.

Example

extern crate shrev;

use shrev::EventHandler;

#[derive(Clone, Debug, PartialEq, Eq)]
pub struct TestEvent {
    data: u32,
}

fn main() {
    let mut event_handler = EventHandler::new();

    event_handler
        .write(&mut vec![TestEvent { data: 1 }, TestEvent { data: 2 }])
        .expect("");

    let mut reader_id = event_handler.register_reader();

    // Should be empty, because reader was created after the write
    assert_eq!(
        Vec::<TestEvent>::default(),
        event_handler
            .read(&mut reader_id)
            .unwrap()
            .cloned()
            .collect::<Vec<_>>()
    );

    event_handler
        .write(&mut vec![TestEvent { data: 8 }, TestEvent { data: 9 }])
        .expect("");

    // Should have data, as a second write was done
    assert_eq!(
        vec![TestEvent { data: 8 }, TestEvent { data: 9 }],
        event_handler
            .read(&mut reader_id)
            .unwrap()
            .cloned()
            .collect::<Vec<_>>()
    );
}