sippeangelo
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#ifndef Component_h__
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#define Component_h__
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#include "../Common.h"
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#include "Entity.h"
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#include "ComponentInfo.h"
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struct ComponentWrapper
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{
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ComponentWrapper(const ComponentInfo& componentInfo, char* data)
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: EntityID(*reinterpret_cast<::EntityID*>(data))
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, Info(componentInfo)
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, Data(data)
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{ }
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::EntityID& EntityID;
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const ComponentInfo& Info;
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char* Data;
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template <typename T>
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T& Property(std::string name)
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{
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unsigned int offset = Info.FieldOffsets.at(name);
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return *reinterpret_cast<T*>(&Data[offset]);
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}
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template <typename T>
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void SetProperty(std::string name, T& value) { Property<T>(name)=value; }
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template <typename T>
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void SetProperty(std::string name, const T value) { Property<T>(name)=value; }
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// Specialization for string literals
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template <std::size_t N>
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void SetProperty(std::string name, const char(&value)[N]) { Property<std::string>(name)=std::string(value); }
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struct SubscriptProxy
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{
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friend struct ComponentWrapper;
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private:
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SubscriptProxy(ComponentWrapper* component, std::string propertyName)
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: m_Component(component)
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, m_PropertyName(propertyName)
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{ }
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ComponentWrapper* m_Component;
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std::string m_PropertyName;
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public:
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template <typename T>
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operator T&() { return m_Component->Property<T>(m_PropertyName); }
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template <typename T>
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void operator=(const T val) { m_Component->SetProperty<T>(m_PropertyName, val); }
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template <typename T>
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void operator=(T& val) { m_Component->SetProperty<T>(m_PropertyName, val); }
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// Specialization for string literals
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template<std::size_t N>
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void operator=(const char(&val)[N]) { m_Component->SetProperty<N>(m_PropertyName, val); }
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};
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SubscriptProxy operator[](std::string propertyName) { return SubscriptProxy(this, propertyName); }
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};
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#endif |