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pub use integer_filter_state::IntegerFilterState;
pub use list_filter_state::ListFilterState;
pub use pair_filter_state::PairFilterState;
use std::fmt::Debug;
use std::hash::Hash;
pub use trivial_filter_state::TrivialFilterState;
pub use weight_filter_state::WeightFilterState;

/// The filter state interface represents the state of a (e.g., composition) filter.
pub trait FilterState: PartialEq + Clone + Eq + Hash + Debug {
    type Type;

    fn new(value: Self::Type) -> Self;
    fn new_no_state() -> Self;
    fn state(&self) -> &Self::Type;
}

mod integer_filter_state;
mod list_filter_state;
mod pair_filter_state;
mod trivial_filter_state;
mod weight_filter_state;