ObjectRef.hpp

// Copyright (C) 2017 Jérôme Leclercq
// This file is part of the "Nazara Engine - Core module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#pragma once

#ifndef NAZARA_RESOURCEREF_HPP
#define NAZARA_RESOURCEREF_HPP

#include <Nazara/Prerequesites.hpp>
#include <Nazara/Core/Algorithm.hpp>
#include <Nazara/Core/RefCounted.hpp>
#include <type_traits>

namespace Nz
{
    template<typename T>
    class ObjectRef
    {
        public:
            ObjectRef();
            ObjectRef(T* object);
            ObjectRef(const ObjectRef& ref);
            template<typename U> ObjectRef(const ObjectRef<U>& ref);
            ObjectRef(ObjectRef&& ref) noexcept;
            ~ObjectRef();

            T* Get() const;
            bool IsValid() const;
            T* Release();
            bool Reset(T* object = nullptr);
            ObjectRef& Swap(ObjectRef& ref);

            explicit operator bool() const;
            operator T*() const;
            T* operator->() const;

            ObjectRef& operator=(T* object);
            ObjectRef& operator=(const ObjectRef& ref);
            template<typename U> ObjectRef& operator=(const ObjectRef<U>& ref);
            ObjectRef& operator=(ObjectRef&& ref) noexcept;

        private:
            T* m_object;
    };

    template<typename T> bool operator==(const ObjectRef<T>& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator==(const T& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator==(const ObjectRef<T>& lhs, const T& rhs);

    template<typename T> bool operator!=(const ObjectRef<T>& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator!=(const T& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator!=(const ObjectRef<T>& lhs, const T& rhs);

    template<typename T> bool operator<(const ObjectRef<T>& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator<(const T& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator<(const ObjectRef<T>& lhs, const T& rhs);

    template<typename T> bool operator<=(const ObjectRef<T>& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator<=(const T& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator<=(const ObjectRef<T>& lhs, const T& rhs);

    template<typename T> bool operator>(const ObjectRef<T>& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator>(const T& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator>(const ObjectRef<T>& lhs, const T& rhs);

    template<typename T> bool operator>=(const ObjectRef<T>& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator>=(const T& lhs, const ObjectRef<T>& rhs);
    template<typename T> bool operator>=(const ObjectRef<T>& lhs, const T& rhs);


    template<typename T> struct PointedType<ObjectRef<T>> { typedef T type; };
    template<typename T> struct PointedType<ObjectRef<T> const> { typedef T type; };
}

#include <Nazara/Core/ObjectRef.inl>

#endif // NAZARA_RESOURCEREF_HPP