51 lines
1.0 KiB
C++
51 lines
1.0 KiB
C++
#ifndef EntityWrapper_h__
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#define EntityWrapper_h__
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#include <boost/optional.hpp>
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#include <boost/functional/hash.hpp>
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#include "ComponentWrapper.h"
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class World;
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struct EntityWrapper
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{
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EntityWrapper()
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: World(nullptr)
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, ID(EntityID_Invalid)
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{ }
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EntityWrapper(::World* world, EntityID id)
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: World(world)
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, ID(id)
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{ }
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::World* World;
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EntityID ID;
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static const EntityWrapper Invalid;
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bool HasComponent(const std::string& componentName);
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bool Valid();
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ComponentWrapper operator[](const char* componentName);
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bool operator==(const EntityWrapper& e) const;
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bool operator!=(const EntityWrapper& e) const;
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explicit operator EntityID() const;
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operator bool();
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};
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namespace std
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{
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template<> struct hash<EntityWrapper>
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{
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std::size_t operator()(const EntityWrapper& e) const
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{
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std::size_t seed = 0;
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boost::hash_combine(seed, e.World);
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boost::hash_combine(seed, e.ID);
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return seed;
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}
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};
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}
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#endif
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