Reverse.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Templates/UnrealTemplate.h" // for Swap
 
namespace AlgoImpl
{
    template <typename T>
    void Reverse(T* Array, int32 ArraySize)
    {
        for (int32 i = 0, i2 = ArraySize - 1; i < ArraySize / 2 /*rounding down*/; ++i, --i2)
        {
            Swap(Array[i], Array[i2]);
        }
    }
}
 
namespace Algo
{
    template <typename T, int32 ArraySize>
    UE_REWRITE void Reverse(T (&Array)[ArraySize])
    {
        return AlgoImpl::Reverse((T*)Array, ArraySize);
    }
 
    template <typename T>
    UE_REWRITE void Reverse(T* Array, int32 ArraySize)
    {
        return AlgoImpl::Reverse(Array, ArraySize);
    }
 
    template <typename ContainerType>
    UE_REWRITE void Reverse(ContainerType&& Container)
    {
        return AlgoImpl::Reverse(Container.GetData(), Container.Num());
    }
}