AlignedElement.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include <type_traits>
 
namespace UE::Core
{
    // Helper class to wrap a type for alignment in containers
    template <typename T, uint32 Alignment>
    struct alignas(Alignment) TAlignedElement
    {
        static_assert(!std::is_reference_v<T>);
        
        T Value;
 
        UE_REWRITE constexpr TAlignedElement& operator=(T&& Other)
        {
            Value = MoveTemp(Other);
            return *this;
        }
 
        UE_REWRITE constexpr TAlignedElement& operator=(const T& Other)
        {
            Value = Other;
            return *this;
        }
        
        UE_REWRITE constexpr operator T&&()&&
        {
            return MoveTemp(Value);
        }
        
        UE_REWRITE constexpr operator const T&() const&
        {
            return Value;
        }
        
        UE_REWRITE constexpr operator T&()&
        {
            return Value;
        }
    };
 
    template <typename T, uint32 Alignment> requires(std::is_class_v<T> && !std::is_final_v<T>)
    struct alignas(Alignment) TAlignedElement<T, Alignment>: T
    {
        UE_REWRITE constexpr TAlignedElement& operator=(T&& Other)
        {
            T::operator=(MoveTemp(Other));
            return *this;
        }
        
        UE_REWRITE constexpr TAlignedElement& operator=(const T& Other)
        {
            T::operator=(Other);
            return *this;
        }
    };
}