diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/list/operation/basic.h | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/src/list/operation/basic.h b/src/list/operation/basic.h index cee4cbc..dbd080e 100644 --- a/src/list/operation/basic.h +++ b/src/list/operation/basic.h @@ -2,6 +2,7 @@ #define TYPEASVALUE_SRC_LIST_OPERATION_BASIC_H_ #include "operation/math.h" +#include "conditional/if.h" namespace tav { @@ -26,7 +27,10 @@ struct Nth { typedef If< equal_value<Index, Size<0>>::value, Head<Cons>, - typename Nth<Substract<Index, Size<1>>, Tail<Cons>>::type + typename Nth< + Substract<Index, Size<1>>, + Tail<Cons> + >::type > type; }; @@ -35,6 +39,35 @@ struct Nth<Index, void> { typedef void type; }; +template < + typename Count, + typename Current +> +struct Take { + typedef Cons< + Head<Current>, + typename Take< + Substract<Count, Size<1>>, + Tail<Current> + >::type + > type; +}; + +template <typename Current> +struct Take<Size<0>, Current> { + typedef void type; +}; + +template <typename Count> +struct Take<Count, void> { + typedef void type; +}; + +template <> +struct Take<Size<0>, void> { + typedef void type; +}; + } #endif // TYPEASVALUE_SRC_LIST_OPERATION_BASIC_H_ |