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Diffstat (limited to 'src/list/operation/higher/filter.h')
| -rw-r--r-- | src/list/operation/higher/filter.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/list/operation/higher/filter.h b/src/list/operation/higher/filter.h new file mode 100644 index 0000000..8788aed --- /dev/null +++ b/src/list/operation/higher/filter.h @@ -0,0 +1,34 @@ +#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 Function, + typename List +> +class Filter { + private: + template < + typename Current, + typename Previous + > + struct function_wrapper { + typedef If< + Function<Current>::type::value, + Cons<Current, Previous>, + Previous + > type; + }; + + public: + typedef typename Fold<function_wrapper, void, List>::type type; + +}; + +} + +#endif // TYPEASVALUE_SRC_LIST_OPERATION_HIGHER_FILTER_H_ |