UniversalObjectLocatorFragmentTypeHandle.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreTypes.h"
#include "Templates/TypeHash.h"
#include "UniversalObjectLocatorFwd.h"
 
namespace UE::UniversalObjectLocator
{
 
struct FFragmentTypeHandle
{
    FFragmentTypeHandle()
        : Handle(0xff)
    {
    }
 
    explicit FFragmentTypeHandle(uint8 InHandleOffset)
        : Handle(InHandleOffset)
    {
        check(InHandleOffset != 0xff);
    }
 
    explicit operator bool() const
    {
        return IsValid();
    }
 
    bool IsValid() const
    {
        return Handle != 0xff;
    }
 
    uint8 GetIndex() const
    {
        return Handle;
    }
 
    friend uint32 GetTypeHash(FFragmentTypeHandle In)
    {
        return GetTypeHash(In.Handle);
    }
 
    friend bool operator==(FFragmentTypeHandle A, FFragmentTypeHandle B)
    {
        return A.Handle == B.Handle;
    }
 
    friend bool operator!=(FFragmentTypeHandle A, FFragmentTypeHandle B)
    {
        return A.Handle != B.Handle;
    }
 
    friend bool operator<(FFragmentTypeHandle A, FFragmentTypeHandle B)
    {
        return A.Handle < B.Handle;
    }
 
    friend bool operator>(FFragmentTypeHandle A, FFragmentTypeHandle B)
    {
        return A.Handle > B.Handle;
    }
 
    UNIVERSALOBJECTLOCATOR_API FFragmentType* Resolve() const;
 
private:
    uint8 Handle;
};
 
 
template<typename T>
struct TFragmentTypeHandle : FFragmentTypeHandle
{
    TFragmentTypeHandle()
    {
    }
 
    TFragmentType<T>* Resolve() const
    {
        return static_cast<TFragmentType<T>*>(FFragmentTypeHandle::Resolve());
    }
 
private:
 
    friend class IUniversalObjectLocatorModule;
    friend class FUniversalObjectLocatorModule;
 
    TFragmentTypeHandle(FFragmentTypeHandle InHandle)
        : FFragmentTypeHandle(InHandle)
    {
    }
};
 
} // namespace UE::UniversalObjectLocator