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#ifndef TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_LIST_INDEX_H_
#define TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_LIST_INDEX_H_
#include "operation/math.h"
namespace tav {
namespace detail {
template <
template<typename> class Predicate,
typename List,
typename Index = Size<0>
>
struct index_of_first {
typedef If<
Eval<Predicate<Head<List>>>,
Index,
Eval<index_of_first<
Predicate,
Tail<List>,
Add<Index, Size<1>>
>>
> type;
};
template <
template<typename> class Predicate,
typename Index
>
struct index_of_first<Predicate, void, Index> {
typedef Boolean<false> type;
};
}
template <
template<typename> class Predicate,
typename List
>
using ListIndex = Eval<detail::index_of_first<Predicate, List>>;
}
#endif // TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_LIST_INDEX_H_
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