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#ifndef TYPEASVALUE_SRC_LIST_OPERATION_SECTION_H_
#define TYPEASVALUE_SRC_LIST_OPERATION_SECTION_H_
#include "operation/math.h"
namespace tav {
namespace detail {
template <
typename Index,
typename Count,
typename List
>
struct take_count_at {
typedef Eval<take_count_at<
Substract<Index, Size<1>>,
Count,
Tail<List>
>> type;
};
template <
typename Count,
typename List
>
struct take_count_at<Size<0>, Count, List> {
typedef Cons<
Head<List>,
Eval<take_count_at<
Size<0>,
Substract<Count, Size<1>>,
Tail<List>
>>
> type;
};
template <
typename Index,
typename Count
>
struct take_count_at<Index, Count, void> {
typedef void type;
};
template <typename Count>
struct take_count_at<Size<0>, Count, void> {
typedef void type;
};
template <typename List>
struct take_count_at<Size<0>, Size<0>, List> {
typedef void type;
};
template <>
struct take_count_at<Size<0>, Size<0>, void> {
typedef void type;
};
}
template <
typename Start,
typename End,
typename List
>
using Section = Eval<detail::take_count_at<
Start,
Substract<Add<End, Size<1>>, Start>,
List
>>;
}
#endif // TYPEASVALUE_SRC_LIST_OPERATION_SECTION_H_
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