EM_Task/CoreUObject/Private/UObject/PropertyMulticastDelegate.cpp

// Copyright Epic Games, Inc. All Rights Reserved.

#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "UObject/Class.h"
#include "UObject/UnrealType.h"
#include "UObject/UnrealTypePrivate.h"
#include "UObject/PropertyHelper.h"
#include "UObject/LinkerPlaceholderFunction.h"
#include "Serialization/ArchiveUObjectFromStructuredArchive.h"

// WARNING: This should always be the last include in any file that needs it (except .generated.h)
#include "UObject/UndefineUPropertyMacros.h"

FMulticastScriptDelegate::FInvocationList FMulticastDelegateProperty::EmptyList;

#if WITH_EDITORONLY_DATA
FMulticastDelegateProperty::FMulticastDelegateProperty(UField* InField)
    : FProperty(InField)
{
    UMulticastDelegateProperty* SourceProperty = CastChecked<UMulticastDelegateProperty>(InField);
    SignatureFunction                          = SourceProperty->SignatureFunction;
}
#endif  // WITH_EDITORONLY_DATA

void FMulticastDelegateProperty::PostDuplicate(const FField& InField)
{
    const FMulticastDelegateProperty& Source = static_cast<const FMulticastDelegateProperty&>(InField);
    SignatureFunction                        = Source.SignatureFunction;
    Super::PostDuplicate(InField);
}

/*-----------------------------------------------------------------------------
        FMulticastDelegateProperty.
-----------------------------------------------------------------------------*/
void FMulticastDelegateProperty::InstanceSubobjects(void* Data, void const* DefaultData, UObject* InOwner, FObjectInstancingGraph* InstanceGraph)
{
    if (DefaultData)
    {
        for (int32 i = 0; i < ArrayDim; i++)
        {
            // Fix up references to the class default object (if necessary)
            FMulticastScriptDelegate::FInvocationList::TIterator CurInvocation(GetInvocationList((uint8*)Data + i));
            FMulticastScriptDelegate::FInvocationList::TIterator DefaultInvocation(GetInvocationList((uint8*)DefaultData + i));
            for (; CurInvocation && DefaultInvocation; ++CurInvocation, ++DefaultInvocation)
            {
                FScriptDelegate& DestDelegateInvocation = *CurInvocation;
                UObject* CurrentUObject                 = DestDelegateInvocation.GetUObject();

                if (CurrentUObject)
                {
                    FScriptDelegate& DefaultDelegateInvocation = *DefaultInvocation;
                    UObject* Template                          = DefaultDelegateInvocation.GetUObject();
                    UObject* NewUObject                        = InstanceGraph->InstancePropertyValue(Template, CurrentUObject, InOwner, HasAnyPropertyFlags(CPF_Transient), false, true);
                    DestDelegateInvocation.BindUFunction(NewUObject, DestDelegateInvocation.GetFunctionName());
                }
            }
            // now finish up the ones for which there is no default
            for (; CurInvocation; ++CurInvocation)
            {
                FScriptDelegate& DestDelegateInvocation = *CurInvocation;
                UObject* CurrentUObject                 = DestDelegateInvocation.GetUObject();

                if (CurrentUObject)
                {
                    UObject* NewUObject = InstanceGraph->InstancePropertyValue(NULL, CurrentUObject, InOwner, HasAnyPropertyFlags(CPF_Transient), false, true);
                    DestDelegateInvocation.BindUFunction(NewUObject, DestDelegateInvocation.GetFunctionName());
                }
            }
        }
    }
    else  // no default data
    {
        for (int32 i = 0; i < ArrayDim; i++)
        {
            for (FMulticastScriptDelegate::FInvocationList::TIterator CurInvocation(GetInvocationList((uint8*)Data + i)); CurInvocation; ++CurInvocation)
            {
                FScriptDelegate& DestDelegateInvocation = *CurInvocation;
                UObject* CurrentUObject                 = DestDelegateInvocation.GetUObject();

                if (CurrentUObject)
                {
                    UObject* NewUObject = InstanceGraph->InstancePropertyValue(NULL, CurrentUObject, InOwner, HasAnyPropertyFlags(CPF_Transient), false, true);
                    DestDelegateInvocation.BindUFunction(NewUObject, DestDelegateInvocation.GetFunctionName());
                }
            }
        }
    }
}

bool FMulticastDelegateProperty::Identical(const void* A, const void* B, uint32 PortFlags) const
{
    const FMulticastScriptDelegate::FInvocationList& ListA = GetInvocationList(A);
    const FMulticastScriptDelegate::FInvocationList& ListB = GetInvocationList(B);

    const int32 ListASize                                  = ListA.Num();
    if (ListASize != ListB.Num())
    {
        return false;
    }

    for (int32 CurInvocationIndex = 0; CurInvocationIndex != ListASize; ++CurInvocationIndex)
    {
        const FScriptDelegate& BindingA = ListA[CurInvocationIndex];
        const FScriptDelegate& BindingB = ListB[CurInvocationIndex];

        if (BindingA.GetUObject() != BindingB.GetUObject())
        {
            return false;
        }

        if (BindingA.GetFunctionName() != BindingB.GetFunctionName())
        {
            return false;
        }
    }

    return true;
}

bool FMulticastDelegateProperty::NetSerializeItem(FArchive& Ar, UPackageMap* Map, void* Data, TArray<uint8>* MetaData) const
{
    // Do not allow replication of delegates, as there is no way to make this secure (it allows the execution of any function in any object, on the remote client/server)
    return 1;
}

FString FMulticastDelegateProperty::GetCPPType(FString* ExtendedTypeText /*=NULL*/, uint32 CPPExportFlags /*=0*/) const
{
#if HACK_HEADER_GENERATOR
    // We have this test because sometimes the delegate hasn't been set up by FixupDelegateProperties at the time
    // we need the type for an error message.  We deliberately format it so that it's unambiguously not CPP code, but is still human-readable.
    if (!SignatureFunction)
    {
        return FString(TEXT("{multicast delegate type}"));
    }
#endif

    FString UnmangledFunctionName   = SignatureFunction->GetName().LeftChop(FString(HEADER_GENERATED_DELEGATE_SIGNATURE_SUFFIX).Len());
    const UClass* OwnerClass        = SignatureFunction->GetOwnerClass();

    const bool bBlueprintCppBackend = (0 != (CPPExportFlags & EPropertyExportCPPFlags::CPPF_BlueprintCppBackend));
    const bool bNative              = SignatureFunction->IsNative();
    if (bBlueprintCppBackend && bNative)
    {
        UStruct* StructOwner = Cast<UStruct>(SignatureFunction->GetOuter());
        if (StructOwner)
        {
            return FString::Printf(TEXT("%s%s::F%s"), StructOwner->GetPrefixCPP(), *StructOwner->GetName(), *UnmangledFunctionName);
        }
    }
    else
    {
        if ((0 != (CPPExportFlags & EPropertyExportCPPFlags::CPPF_BlueprintCppBackend)) && OwnerClass && !OwnerClass->HasAnyClassFlags(CLASS_Native))
        {
            // The name must be valid, this removes spaces, ?, etc from the user's function name. It could
            // be slightly shorter because the postfix ("__pf") is not needed here because we further post-
            // pend to the string. Normally the postfix is needed to make sure we don't mangle to a valid
            // identifier and collide:
            UnmangledFunctionName = UnicodeToCPPIdentifier(UnmangledFunctionName, false, TEXT(""));
            // the name must be unique
            const FString OwnerName                = UnicodeToCPPIdentifier(OwnerClass->GetName(), false, TEXT(""));
            const FString NewUnmangledFunctionName = FString::Printf(TEXT("%s__%s"), *UnmangledFunctionName, *OwnerName);
            UnmangledFunctionName                  = NewUnmangledFunctionName;
        }
        if (0 != (CPPExportFlags & EPropertyExportCPPFlags::CPPF_CustomTypeName))
        {
            UnmangledFunctionName += TEXT("__MulticastDelegate");
        }
    }
    return FString(TEXT("F")) + UnmangledFunctionName;
}

FString FMulticastDelegateProperty::GetCPPTypeForwardDeclaration() const
{
    return FString();
}

void FMulticastDelegateProperty::ExportTextItem(FString& ValueStr, const void* PropertyValue, const void* DefaultValue, UObject* Parent, int32 PortFlags, UObject* ExportRootScope) const
{
    if (0 != (PortFlags & PPF_ExportCpp))
    {
        ValueStr += TEXT("{}");
        return;
    }

    const FMulticastScriptDelegate::FInvocationList& InvocationList = GetInvocationList(PropertyValue);

    // Start delegate array with open paren
    ValueStr += TEXT("(");

    bool bIsFirstFunction = true;
    for (FMulticastScriptDelegate::FInvocationList::TConstIterator CurInvocation(InvocationList); CurInvocation; ++CurInvocation)
    {
        if (CurInvocation->IsBound())
        {
            if (!bIsFirstFunction)
            {
                ValueStr += TEXT(",");
            }
            bIsFirstFunction       = false;

            bool bDelegateHasValue = CurInvocation->GetFunctionName() != NAME_None;
            ValueStr += FString::Printf(TEXT("%s.%s"),
                                        CurInvocation->GetUObject() != NULL ? *CurInvocation->GetUObject()->GetName() : TEXT("(null)"),
                                        *CurInvocation->GetFunctionName().ToString());
        }
    }

    // Close the array (NOTE: It could be empty, but that's fine.)
    ValueStr += TEXT(")");
}

const TCHAR* FMulticastDelegateProperty::ImportDelegateFromText(FMulticastScriptDelegate& MulticastDelegate, const TCHAR* Buffer, UObject* Parent, FOutputDevice* ErrorText) const
{
    // Multi-cast delegates always expect an opening parenthesis when using assignment syntax, so that
    // users don't accidentally blow away already-bound delegates in DefaultProperties.  This also helps
    // to differentiate between single-cast and multi-cast delegates
    if (*Buffer != TCHAR('('))
    {
        return NULL;
    }

    // Clear the existing delegate
    MulticastDelegate.Clear();

    // process opening parenthesis
    ++Buffer;
    SkipWhitespace(Buffer);

    // Empty Multi-cast delegates is still valid.
    if (*Buffer == TCHAR(')'))
    {
        return Buffer;
    }

    do
    {
        // Parse the delegate
        FScriptDelegate ImportedDelegate;
        Buffer = DelegatePropertyTools::ImportDelegateFromText(ImportedDelegate, SignatureFunction, Buffer, Parent, ErrorText);
        if (Buffer == NULL)
        {
            return NULL;
        }

        // Add this delegate to our multicast delegate's invocation list
        MulticastDelegate.AddUnique(ImportedDelegate);

        SkipWhitespace(Buffer);
    } while (*Buffer == TCHAR(',') && Buffer++);

    // We expect a closing paren
    if (*(Buffer++) != TCHAR(')'))
    {
        return NULL;
    }

    return MulticastDelegate.IsBound() ? Buffer : NULL;
}

const TCHAR* FMulticastDelegateProperty::ImportText_Add(const TCHAR* Buffer, void* PropertyValue, int32 PortFlags, UObject* Parent, FOutputDevice* ErrorText) const
{
    if (!ValidateImportFlags(PortFlags, ErrorText))
    {
        return NULL;
    }

    // Parse the delegate
    FScriptDelegate ImportedDelegate;
    Buffer = DelegatePropertyTools::ImportDelegateFromText(ImportedDelegate, SignatureFunction, Buffer, Parent, ErrorText);
    if (Buffer == NULL)
    {
        return NULL;
    }

    // Add this delegate to our multicast delegate's invocation list
    AddDelegate(MoveTemp(ImportedDelegate), Parent, PropertyValue);

    SkipWhitespace(Buffer);

    return Buffer;
}

const TCHAR* FMulticastDelegateProperty::ImportText_Remove(const TCHAR* Buffer, void* PropertyValue, int32 PortFlags, UObject* Parent, FOutputDevice* ErrorText) const
{
    if (!ValidateImportFlags(PortFlags, ErrorText))
    {
        return NULL;
    }

    // Parse the delegate
    FScriptDelegate ImportedDelegate;
    Buffer = DelegatePropertyTools::ImportDelegateFromText(ImportedDelegate, SignatureFunction, Buffer, Parent, ErrorText);
    if (Buffer == NULL)
    {
        return NULL;
    }

    // Remove this delegate from our multicast delegate's invocation list
    RemoveDelegate(ImportedDelegate, Parent, PropertyValue);

    SkipWhitespace(Buffer);

    return Buffer;
}

void FMulticastDelegateProperty::Serialize(FArchive& Ar)
{
    Super::Serialize(Ar);
    Ar << SignatureFunction;

#if USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING
    if (Ar.IsLoading() || Ar.IsObjectReferenceCollector())
    {
        if (auto PlaceholderFunc = Cast<ULinkerPlaceholderFunction>(SignatureFunction))
        {
            PlaceholderFunc->AddReferencingProperty(this);
        }
    }
#endif  // USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING
}

void FMulticastDelegateProperty::BeginDestroy()
{
#if USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING
    if (auto PlaceholderFunc = Cast<ULinkerPlaceholderFunction>(SignatureFunction))
    {
        PlaceholderFunc->RemoveReferencingProperty(this);
    }
#endif  // USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING

    Super::BeginDestroy();
}

bool FMulticastDelegateProperty::SameType(const FProperty* Other) const
{
    return Super::SameType(Other) && (SignatureFunction == ((FMulticastDelegateProperty*)Other)->SignatureFunction);
}

EConvertFromTypeResult FMulticastDelegateProperty::ConvertFromType(const FPropertyTag& Tag, FStructuredArchive::FSlot Slot, uint8* Data, UStruct* DefaultsStruct)
{
    // Multicast delegate properties are serialization compatible
    if (Tag.Type == NAME_MulticastDelegateProperty || Tag.Type == FMulticastInlineDelegateProperty::StaticClass()->GetFName() || Tag.Type == FMulticastSparseDelegateProperty::StaticClass()->GetFName())
    {
        uint8* DestAddress = ContainerPtrToValuePtr<uint8>(Data, Tag.ArrayIndex);
        SerializeItem(Slot, DestAddress, nullptr);

        return EConvertFromTypeResult::Converted;
    }

    return EConvertFromTypeResult::UseSerializeItem;
}

void FMulticastDelegateProperty::AddReferencedObjects(FReferenceCollector& Collector)
{
#if USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING
    if (SignatureFunction && !SignatureFunction->IsA<ULinkerPlaceholderFunction>())
#endif  // USE_CIRCULAR_DEPENDENCY_LOAD_DEFERRING
    {
        Collector.AddReferencedObject(SignatureFunction);
    }
    Super::AddReferencedObjects(Collector);
}

IMPLEMENT_FIELD(FMulticastDelegateProperty)

const FMulticastScriptDelegate* FMulticastInlineDelegateProperty::GetMulticastDelegate(const void* PropertyValue) const
{
    return (const FMulticastScriptDelegate*)PropertyValue;
}

void FMulticastInlineDelegateProperty::SetMulticastDelegate(void* PropertyValue, FMulticastScriptDelegate ScriptDelegate) const
{
    *(FMulticastScriptDelegate*)PropertyValue = MoveTemp(ScriptDelegate);
}

FMulticastScriptDelegate::FInvocationList& FMulticastInlineDelegateProperty::GetInvocationList(const void* PropertyValue) const
{
    return (PropertyValue ? ((FMulticastScriptDelegate*)PropertyValue)->InvocationList : EmptyList);
}

void FMulticastInlineDelegateProperty::SerializeItem(FStructuredArchive::FSlot Slot, void* Value, void const* Defaults) const
{
    FArchiveUObjectFromStructuredArchive Adapter(Slot);
    FArchive& Ar = Adapter.GetArchive();
    Ar << *GetPropertyValuePtr(Value);
}

const TCHAR* FMulticastInlineDelegateProperty::ImportText_Internal(const TCHAR* Buffer, void* PropertyValue, int32 PortFlags, UObject* Parent, FOutputDevice* ErrorText) const
{
    FMulticastScriptDelegate& MulticastDelegate = (*(FMulticastScriptDelegate*)PropertyValue);
    return ImportDelegateFromText(MulticastDelegate, Buffer, Parent, ErrorText);
}

void ResolveDelegateReference(const FMulticastInlineDelegateProperty* InlineProperty, UObject*& Parent, void*& PropertyValue)
{
    if (PropertyValue == nullptr)
    {
        checkf(Parent, TEXT("Must specify at least one of Parent or PropertyValue"));
        PropertyValue = InlineProperty->GetPropertyValuePtr_InContainer(Parent);
    }
    // Owner doesn't matter for inline delegates, so we don't worry about the Owner == nullptr case
}

void FMulticastInlineDelegateProperty::AddDelegate(FScriptDelegate ScriptDelegate, UObject* Parent, void* PropertyValue) const
{
    ResolveDelegateReference(this, Parent, PropertyValue);

    FMulticastScriptDelegate& MulticastDelegate = (*(FMulticastScriptDelegate*)PropertyValue);

    // Add this delegate to our multicast delegate's invocation list
    MulticastDelegate.AddUnique(MoveTemp(ScriptDelegate));
}

void FMulticastInlineDelegateProperty::RemoveDelegate(const FScriptDelegate& ScriptDelegate, UObject* Parent, void* PropertyValue) const
{
    ResolveDelegateReference(this, Parent, PropertyValue);

    FMulticastScriptDelegate& MulticastDelegate = (*(FMulticastScriptDelegate*)PropertyValue);

    // Remove this delegate from our multicast delegate's invocation list
    MulticastDelegate.Remove(ScriptDelegate);
}

void FMulticastInlineDelegateProperty::ClearDelegate(UObject* Parent, void* PropertyValue) const
{
    ResolveDelegateReference(this, Parent, PropertyValue);

    FMulticastScriptDelegate& MulticastDelegate = (*(FMulticastScriptDelegate*)PropertyValue);
    MulticastDelegate.Clear();
}

IMPLEMENT_FIELD(FMulticastInlineDelegateProperty)

const FMulticastScriptDelegate* FMulticastSparseDelegateProperty::GetMulticastDelegate(const void* PropertyValue) const
{
    const FSparseDelegate* SparseDelegate = (const FSparseDelegate*)PropertyValue;
    if (SparseDelegate->IsBound())
    {
        USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
        UObject* OwningObject                       = FSparseDelegateStorage::ResolveSparseOwner(*SparseDelegate, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName);
        return FSparseDelegateStorage::GetMulticastDelegate(OwningObject, SparseDelegateFunc->DelegateName);
    }

    return nullptr;
}

void FMulticastSparseDelegateProperty::SetMulticastDelegate(void* PropertyValue, FMulticastScriptDelegate ScriptDelegate) const
{
    FSparseDelegate& SparseDelegate             = *(FSparseDelegate*)PropertyValue;

    USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
    UObject* OwningObject                       = FSparseDelegateStorage::ResolveSparseOwner(SparseDelegate, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName);

    if (ScriptDelegate.IsBound())
    {
        FSparseDelegateStorage::SetMulticastDelegate(OwningObject, SparseDelegateFunc->DelegateName, MoveTemp(ScriptDelegate));
        SparseDelegate.bIsBound = true;
    }
    else if (SparseDelegate.bIsBound)
    {
        FSparseDelegateStorage::Clear(OwningObject, SparseDelegateFunc->DelegateName);
        SparseDelegate.bIsBound = false;
    }
}

FMulticastScriptDelegate::FInvocationList& FMulticastSparseDelegateProperty::GetInvocationList(const void* PropertyValue) const
{
    if (FSparseDelegate* SparseDelegate = (FSparseDelegate*)PropertyValue)
    {
        if (SparseDelegate->IsBound())
        {
            USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
            UObject* OwningObject                       = FSparseDelegateStorage::ResolveSparseOwner(*SparseDelegate, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName);
            if (FMulticastScriptDelegate* Delegate = FSparseDelegateStorage::GetMulticastDelegate(OwningObject, SparseDelegateFunc->DelegateName))
            {
                return Delegate->InvocationList;
            }
        }
    }
    return EmptyList;
}

void FMulticastSparseDelegateProperty::SerializeItem(FStructuredArchive::FSlot Slot, void* Value, void const* Defaults) const
{
    FArchiveUObjectFromStructuredArchive Adapter(Slot);
    SerializeItemInternal(Adapter.GetArchive(), Value, Defaults);
}

void FMulticastSparseDelegateProperty::SerializeItemInternal(FArchive& Ar, void* Value, void const* Defaults) const
{
    FSparseDelegate& SparseDelegate = *(FSparseDelegate*)Value;

    if (Ar.IsLoading())
    {
        FMulticastScriptDelegate Delegate;
        Ar << Delegate;

        if (Delegate.IsBound())
        {
            USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
            UObject* OwningObject                       = FSparseDelegateStorage::ResolveSparseOwner(SparseDelegate, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName);
            FSparseDelegateStorage::SetMulticastDelegate(OwningObject, SparseDelegateFunc->DelegateName, MoveTemp(Delegate));
            SparseDelegate.bIsBound = true;
        }
        else if (SparseDelegate.bIsBound)
        {
            USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
            UObject* OwningObject                       = FSparseDelegateStorage::ResolveSparseOwner(SparseDelegate, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName);
            FSparseDelegateStorage::Clear(OwningObject, SparseDelegateFunc->DelegateName);
            SparseDelegate.bIsBound = false;
        }
    }
    else
    {
        if (SparseDelegate.IsBound())
        {
            USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
            UObject* OwningObject                       = FSparseDelegateStorage::ResolveSparseOwner(SparseDelegate, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName);
            if (FMulticastScriptDelegate* Delegate = FSparseDelegateStorage::GetMulticastDelegate(OwningObject, SparseDelegateFunc->DelegateName))
            {
                Ar << *Delegate;
            }
            else
            {
                Ar << EmptyList;
            }
        }
        else
        {
            Ar << EmptyList;
        }
    }
}

const TCHAR* FMulticastSparseDelegateProperty::ImportText_Internal(const TCHAR* Buffer, void* PropertyValue, int32 PortFlags, UObject* Parent, FOutputDevice* ErrorText) const
{
    FMulticastScriptDelegate Delegate;
    const TCHAR* Result = ImportDelegateFromText(Delegate, Buffer, Parent, ErrorText);

    if (Result)
    {
        FSparseDelegate& SparseDelegate             = *(FSparseDelegate*)PropertyValue;
        USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);

        if (Delegate.IsBound())
        {
            FSparseDelegateStorage::SetMulticastDelegate(Parent, SparseDelegateFunc->DelegateName, MoveTemp(Delegate));
            SparseDelegate.bIsBound = true;
        }
        else
        {
            FSparseDelegateStorage::Clear(Parent, SparseDelegateFunc->DelegateName);
            SparseDelegate.bIsBound = false;
        }
    }

    return Result;
}

void ResolveDelegateReference(const FMulticastSparseDelegateProperty* SparseProperty, UObject*& Parent, void*& PropertyValue)
{
    USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SparseProperty->SignatureFunction);

    if (Parent == nullptr)
    {
        checkf(PropertyValue, TEXT("Must specify at least one of Parent or PropertyValue"));
        Parent = FSparseDelegateStorage::ResolveSparseOwner(*(FSparseDelegate*)PropertyValue, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName);
    }
    else if (PropertyValue)
    {
        checkSlow(Parent == FSparseDelegateStorage::ResolveSparseOwner(*(FSparseDelegate*)PropertyValue, SparseDelegateFunc->OwningClassName, SparseDelegateFunc->DelegateName));
    }
    else
    {
        PropertyValue = SparseProperty->GetPropertyValuePtr_InContainer(Parent);
    }
}

void FMulticastSparseDelegateProperty::AddDelegate(FScriptDelegate ScriptDelegate, UObject* Parent, void* PropertyValue) const
{
    ResolveDelegateReference(this, Parent, PropertyValue);
    USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
    FSparseDelegate& SparseDelegate             = *(FSparseDelegate*)PropertyValue;
    SparseDelegate.__Internal_AddUnique(Parent, SparseDelegateFunc->DelegateName, MoveTemp(ScriptDelegate));
}

void FMulticastSparseDelegateProperty::RemoveDelegate(const FScriptDelegate& ScriptDelegate, UObject* Parent, void* PropertyValue) const
{
    ResolveDelegateReference(this, Parent, PropertyValue);
    USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
    FSparseDelegate& SparseDelegate             = *(FSparseDelegate*)PropertyValue;
    SparseDelegate.__Internal_Remove(Parent, SparseDelegateFunc->DelegateName, ScriptDelegate);
}

void FMulticastSparseDelegateProperty::ClearDelegate(UObject* Parent, void* PropertyValue) const
{
    ResolveDelegateReference(this, Parent, PropertyValue);
    USparseDelegateFunction* SparseDelegateFunc = CastChecked<USparseDelegateFunction>(SignatureFunction);
    FSparseDelegate& SparseDelegate             = *(FSparseDelegate*)PropertyValue;
    SparseDelegate.__Internal_Clear(Parent, SparseDelegateFunc->DelegateName);
}

IMPLEMENT_FIELD(FMulticastSparseDelegateProperty)

#include "UObject/DefineUPropertyMacros.h"