IsEnumClass.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Templates/AndOrNot.h"
 
namespace UE::Core::Private::IsEnumClass
{
    template <typename T>
    struct TIsEnumConvertibleToInt
    {
        static char (&Resolve(int))[2];
        static char Resolve(...);
 
        enum { Value = sizeof(Resolve(T())) - 1 };
    };
}
 
template <typename T>
struct TIsEnumClass
{ 
    enum { Value = TAndValue<__is_enum(T), TNot<UE::Core::Private::IsEnumClass::TIsEnumConvertibleToInt<T>>>::Value };
};