AStorage.hpp

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#ifndef ECSTASY_STORAGE_ASTORAGE_HPP_
#define ECSTASY_STORAGE_ASTORAGE_HPP_
 
#include <span>
 
#include "ecstasy/config.hpp"
#include "ecstasy/resources/entity/Entity.hpp"
#include "ecstasy/storages/IStorage.hpp"
#include "util/BitSet.hpp"
 
namespace ecstasy
{
 
    template <typename C>
    class AStorage : public IStorage {
      public:
        using Component = C;
 
        using QueryData = C &;
        using ConstQueryData = const C &;
 
        virtual bool erase(Entity::Index index) = 0;
 
        void erase(std::span<Entity> entities) override final
        {
            for (Entity entity : entities)
                erase(entity.getIndex());
        }
 
        bool contains(Entity::Index index) const noexcept override final
        {
            return (index < getMask().size()) && getMask()[index];
        }
 
        [[nodiscard]] Component &at(Entity::Index index)
        {
            if (!contains(index)) [[unlikely]]
                throw std::out_of_range("Entity doesn't have the component");
            return (*this)[index];
        }
 
        [[nodiscard]] const Component &at(Entity::Index index) const
        {
            if (!contains(index)) [[unlikely]]
                throw std::out_of_range("Entity doesn't have the component");
            return (*this)[index];
        }
 
        [[nodiscard]] virtual Component &operator[](Entity::Index index) = 0;
 
        [[nodiscard]] QueryData getQueryData(Entity::Index index)
        {
            return (*this)[index];
        };
 
        [[nodiscard]] virtual const Component &operator[](Entity::Index index) const = 0;
 
        [[nodiscard]] ConstQueryData getQueryData(Entity::Index index) const
        {
            return (*this)[index];
        };
 
        [[nodiscard]] const std::type_info &getComponentTypeInfos() const noexcept override final
        {
            return typeid(Component);
        }
 
        [[nodiscard]] virtual Component &insert(Entity::Index index, Component &&c) = 0;
    };
 
} // namespace ecstasy
 
#endif /* !ECSTASY_STORAGE_ASTORAGE_HPP_ */