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#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 {
namespace detail {
template <template<typename> class Predicate>
struct filter_predicate {
template <
typename Current,
typename Previous
>
using function = If<
Eval<Predicate<Current>>,
Cons<Current, Previous>,
Previous
>;
};
}
template <
template<typename> class Predicate,
typename List
>
using Filter = Fold<
detail::filter_predicate<Predicate>::template function,
void,
List
>;
}
#endif // TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FILTER_H_
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