NameAsStringIndexProxyArchive.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Containers/Array.h"
#include "Containers/Set.h"
#include "CoreTypes.h"
#include "Serialization/ArchiveProxy.h"
#include "UObject/NameTypes.h"
 
class FArchive;
 
/**
 * Implements a proxy archive that serializes FNames as string data or an index (if the same name is repeated).
 */
struct FNameAsStringIndexProxyArchive : public FArchiveProxy
{
    /** When FName is first encountered, it is added to the table and saved as a string, otherwise, its index is written. Indices can be looked up from this TSet since it is not compacted. */
    TSet<FName> NamesSeenOnSave;
 
    /** Table of names that is populated as the archive is being loaded. */
    TArray<FName> NamesLoaded;
 
    /**
     * Creates and initializes a new instance.
     *
     * @param InInnerArchive The inner archive to proxy.
     */
    FNameAsStringIndexProxyArchive(FArchive& InInnerArchive)
        : FArchiveProxy(InInnerArchive)
    { }
 
    /**
     * Serialize the given FName as an FString or an index (if we encountered it again)
     */
    virtual FArchive& operator<<(FName& N);
};