#pragma once

class Creature;

class CreatureWeakPtrChunk
{
 public:

    CreatureWeakPtrChunk();
    ~CreatureWeakPtrChunk();
    void Clear();
    void Set(Creature* c);

 private:
    Creature* ptr_ = nullptr;
    list_head ptrs_;
    friend class CreatureWeakPtr;
};

class CreatureWeakPtr
{
 public:

    CreatureWeakPtr();
    CreatureWeakPtr(const CreatureWeakPtr& x);
    CreatureWeakPtr(CreatureWeakPtr&& x);
    CreatureWeakPtr& operator=(const CreatureWeakPtr& x);
    CreatureWeakPtr&& operator=(CreatureWeakPtr&& x);
    ~CreatureWeakPtr();
    void Reset();
    Creature* Get();
    void Attach(Creature* c);
    void Detach();

 private:
    Creature* ptr_ = nullptr;
    list_head entry_;

    friend class CreatureWeakPtrChunk;
};