collection_common.hpp

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#pragma once
#include "../../../self.hpp"

namespace xtd {
  namespace collections {
    namespace generic {
      namespace extensions {
        template<typename type_t, typename collection_t>
        class collection_common {
        public:
          
          [[nodiscard]] virtual auto empty() const noexcept -> bool {return self().count() == 0;}
          
          [[nodiscard]] virtual auto size() const noexcept -> xtd::usize {return self().count();}
          
          
          virtual auto operator <<(const type_t& item) -> collection_t& {
            self().add(item);
            return self();
          }
          
          virtual auto operator <<(type_t&& item) -> collection_t& {
            self().add(std::move(item));
            return self();
          }
          
          virtual auto operator >>(const type_t& item) -> collection_t& {
            self().remove(item);
            return self();
          }

          
        private:
          auto self() const noexcept -> const collection_t& {return static_cast<const collection_t&>(self_);}
          auto self() noexcept -> collection_t& {return static_cast<collection_t&>(self_);}
          
          friend collection_t;
          collection_common() = default;
        };
      }
    }
  }
}