Invercargill/src/lib/Interfaces.vala

namespace Invercargill {


    public interface Equatable<T> {
        public abstract bool equals(T other);
    }

    public interface Hashable {
        public abstract uint hash_code();
    }

    public interface Comparable<T> : Equatable<T> {
        public abstract int compare(T other);
    }

}