MarkerStorage.hpp

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#ifndef ECSTASY_STORAGE_MARKERSTORAGE_HPP_
#define ECSTASY_STORAGE_MARKERSTORAGE_HPP_
 
#include "AStorage.hpp"
 
namespace ecstasy
{
    template <typename C>
    class MarkerStorage : public AStorage<C> {
      public:
        using Component = typename AStorage<C>::Component;
 
        template <typename... Args>
        MarkerStorage(Args &&...componentArgs) : _defaultComponent(std::forward<Args>(componentArgs)...)
        {
        }
 
        MarkerStorage(const MarkerStorage &other) = delete;
 
        Component &emplace(Entity::Index index)
        {
            _mask.resize(std::max(_mask.size(), index + 1));
            _mask[index] = true;
            return _defaultComponent;
        }
 
        Component &insert(Entity::Index index, Component &&c) override final
        {
            (void)c;
            _mask.resize(std::max(_mask.size(), index + 1));
            _mask[index] = true;
            return _defaultComponent;
        }
 
        bool erase(Entity::Index index) override final
        {
            if (_mask.size() <= index) [[unlikely]]
                return false;
            bool result = _mask[index];
 
            _mask[index] = false;
            return result;
        }
 
        [[nodiscard]] Component &operator[](Entity::Index index) noexcept override final
        {
            (void)index;
            return _defaultComponent;
        }
 
        [[nodiscard]] const Component &operator[](Entity::Index index) const noexcept override final
        {
            (void)index;
            return _defaultComponent;
        }
 
        [[nodiscard]] constexpr const util::BitSet &getMask() const noexcept override final
        {
            return _mask;
        }
 
        [[nodiscard]] constexpr const Component &GetInternalComponent() const noexcept
        {
            return _defaultComponent;
        }
 
        [[nodiscard]] constexpr Component &GetInternalComponent() noexcept
        {
            return _defaultComponent;
        }
 
      private:
        Component _defaultComponent;
        util::BitSet _mask;
    };
} // namespace ecstasy
 
#endif /* !ECSTASY_STORAGE_MARKERSTORAGE_HPP_ */