#ifndef TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FILTER_H_
#define TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FILTER_H_

#include "fold.h"
#include "conditional/if.h"

namespace tav {

template <
	template<typename> class Predicate,
	typename                 List
>
class Filter {
	private:
		template <
			typename Current,
			typename Previous
		>
		struct predicate_wrapper {
			typedef If<
				Predicate<Current>::type::value,
				Cons<Current, Previous>,
				Previous
			> type;
		};

	public:
		typedef typename Fold<predicate_wrapper, void, List>::type type;

};

template <
	template<typename> class Predicate,
	typename                 List
>
class Remove {
	private:
		template <typename Element>
		using predicate_negator = Not<Predicate<Element>>;

	public:
		typedef typename Filter<predicate_negator, List>::type type;

};

}

#endif  // TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FILTER_H_