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use super::event_stream::EventStream;

// All filters implement this trait.
pub trait FilterTrait {
    // When adding or removing events, implement run.
    fn run(&self, evs: &mut EventStream);

    // Only used for filters, where it is run when the filter is inside Not().
    // Override this if you make a filter that doesn't use define_filter!.
    fn run_inverse(&self, evs: &mut EventStream) {
        self.run(evs);
    }

    // Only used for Init filter
    fn run_init(&self, _evs: &mut EventStream) {}
    // Only used for Exit filter
    fn run_exit(&self, _evs: &mut EventStream) {}
}