entity_space.hh

#include <vector>
#include <memory>

#include "util/util.hh"
#include "entity.hh"

#ifndef _SCRATCH_ENTITY_SPACE
#define _SCRATCH_ENTITY_SPACE

#ifdef _DEBUG
using namespace util::io; // when not debugging, shouldn't have print stmts
#endif

/**
 * An environment which manages the specified components.
 * 
 */
template <class... Components>
struct EntitySpace
{
  using Index = util::TypeVector<Components...>;
  using EntityType = Entity<Components...>;
  using Entities = std::vector<EntityType>;
  using Iterator = typename Entities::iterator;
  using BitMask = typename EntityType::BitMask;

  static const size_t max_components = sizeof...(Components);
    
  // members
  Entities m_entities;
    
  EntityID insert(EntityType&& entity)
  {
    EntityID id = 0;

    auto it = m_entities.begin();
    while (it != m_entities.end() &&
           !it->is_empty())
      ++it, ++id;

    m_entities.insert(it, std::move(entity));
        
    return id;
  }
    
  EntityType& operator[](EntityID id)
  { return m_entities[id]; }

  Iterator begin() { return m_entities.begin(); }
  Iterator end() { return m_entities.end(); }

};


#ifdef _BUILD_TEST

#endif

#endif