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384 lines
16 KiB
C++
384 lines
16 KiB
C++
// Copyright 1998-2014 Epic Games, Inc. All Rights Reserved.
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#include "BlueprintGraphPrivatePCH.h"
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#include "CompilerResultsLog.h"
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#include "KismetCompiler.h"
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#include "K2ActionMenuBuilder.h"
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#define LOCTEXT_NAMESPACE "UK2Node_BaseAsyncTask"
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UK2Node_BaseAsyncTask::UK2Node_BaseAsyncTask(const class FPostConstructInitializeProperties& PCIP)
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: Super(PCIP)
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, ProxyFactoryFunctionName(NAME_None)
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, ProxyFactoryClass(NULL)
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, ProxyClass(NULL)
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, ProxyActivateFunctionName(NAME_None)
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{
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}
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FString UK2Node_BaseAsyncTask::GetTooltip() const
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{
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const FString FunctionToolTipText = UK2Node_CallFunction::GetDefaultTooltipForFunction(GetFactoryFunction());
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return FunctionToolTipText;
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}
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FText UK2Node_BaseAsyncTask::GetNodeTitle(ENodeTitleType::Type TitleType) const
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{
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const FString FunctionToolTipText = UK2Node_CallFunction::GetUserFacingFunctionName(GetFactoryFunction());
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return FText::FromString(FunctionToolTipText);
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}
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FString UK2Node_BaseAsyncTask::GetCategoryName()
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{
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const FString GenericFunctionCategory = LOCTEXT("FunctionCategory", "Call Function").ToString();
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return UK2Node_CallFunction::GetDefaultCategoryForFunction(GetFactoryFunction(), GenericFunctionCategory);
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}
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void UK2Node_BaseAsyncTask::GetMenuEntries(FGraphContextMenuBuilder& ContextMenuBuilder) const
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{
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const UEdGraphSchema_K2* K2Schema = GetDefault<UEdGraphSchema_K2>();
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const bool bAllowLatentFuncs = (K2Schema->GetGraphType(ContextMenuBuilder.CurrentGraph) == GT_Ubergraph);
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if (bAllowLatentFuncs)
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{
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UK2Node_BaseAsyncTask* NodeTemplate = NewObject<UK2Node_BaseAsyncTask>(ContextMenuBuilder.OwnerOfTemporaries, GetClass());
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CreateDefaultMenuEntry(NodeTemplate, ContextMenuBuilder);
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}
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}
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TSharedPtr<FEdGraphSchemaAction_K2NewNode> UK2Node_BaseAsyncTask::CreateDefaultMenuEntry(UK2Node_BaseAsyncTask* NodeTemplate, FGraphContextMenuBuilder& ContextMenuBuilder) const
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{
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TSharedPtr<FEdGraphSchemaAction_K2NewNode> NodeAction = FK2ActionMenuBuilder::AddNewNodeAction(ContextMenuBuilder, NodeTemplate->GetCategoryName(), NodeTemplate->GetNodeTitle(ENodeTitleType::ListView), NodeTemplate->GetTooltip(), 0, NodeTemplate->GetKeywords());
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NodeAction->NodeTemplate = NodeTemplate;
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return NodeAction;
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}
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void UK2Node_BaseAsyncTask::AllocateDefaultPins()
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{
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const UEdGraphSchema_K2* K2Schema = GetDefault<UEdGraphSchema_K2>();
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CreatePin(EGPD_Input, K2Schema->PC_Exec, TEXT(""), NULL, false, false, K2Schema->PN_Execute);
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CreatePin(EGPD_Output, K2Schema->PC_Exec, TEXT(""), NULL, false, false, K2Schema->PN_Then);
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UFunction* DelegateSignatureFunction = NULL;
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for (TFieldIterator<UProperty> PropertyIt(ProxyClass, EFieldIteratorFlags::ExcludeSuper); PropertyIt; ++PropertyIt)
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{
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if (UMulticastDelegateProperty* Property = Cast<UMulticastDelegateProperty>(*PropertyIt))
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{
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CreatePin(EGPD_Output, K2Schema->PC_Exec, TEXT(""), NULL, false, false, *Property->GetName());
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if (!DelegateSignatureFunction)
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{
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DelegateSignatureFunction = Property->SignatureFunction;
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}
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}
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}
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if (DelegateSignatureFunction)
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{
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for (TFieldIterator<UProperty> PropIt(DelegateSignatureFunction); PropIt && (PropIt->PropertyFlags & CPF_Parm); ++PropIt)
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{
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UProperty* Param = *PropIt;
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const bool bIsFunctionInput = !Param->HasAnyPropertyFlags(CPF_OutParm) || Param->HasAnyPropertyFlags(CPF_ReferenceParm);
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if (bIsFunctionInput)
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{
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UEdGraphPin* Pin = CreatePin(EGPD_Output, TEXT(""), TEXT(""), NULL, false, false, Param->GetName());
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K2Schema->ConvertPropertyToPinType(Param, /*out*/ Pin->PinType);
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}
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}
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}
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bool bAllPinsGood = true;
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UFunction* Function = ProxyFactoryClass->FindFunctionByName(ProxyFactoryFunctionName);
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if (Function)
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{
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TSet<FString> PinsToHide;
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FBlueprintEditorUtils::GetHiddenPinsForFunction(GetBlueprint(), Function, PinsToHide);
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for (TFieldIterator<UProperty> PropIt(Function); PropIt && (PropIt->PropertyFlags & CPF_Parm); ++PropIt)
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{
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UProperty* Param = *PropIt;
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const bool bIsFunctionInput = !Param->HasAnyPropertyFlags(CPF_OutParm) || Param->HasAnyPropertyFlags(CPF_ReferenceParm);
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if (!bIsFunctionInput)
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{
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// skip function output, it's internal node data
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continue;
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}
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const bool bIsRefParam = Param->HasAnyPropertyFlags(CPF_ReferenceParm) && bIsFunctionInput;
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UEdGraphPin* Pin = CreatePin(EGPD_Input, TEXT(""), TEXT(""), NULL, false, bIsRefParam, Param->GetName());
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const bool bPinGood = (Pin != NULL) && K2Schema->ConvertPropertyToPinType(Param, /*out*/ Pin->PinType);
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if (bPinGood)
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{
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//Flag pin as read only for const reference property
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Pin->bDefaultValueIsIgnored = Param->HasAllPropertyFlags(CPF_ConstParm | CPF_ReferenceParm) && (!Function->HasMetaData(FBlueprintMetadata::MD_AutoCreateRefTerm) || Pin->PinType.bIsArray);
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const bool bAdvancedPin = Param->HasAllPropertyFlags(CPF_AdvancedDisplay);
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Pin->bAdvancedView = bAdvancedPin;
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if(bAdvancedPin && (ENodeAdvancedPins::NoPins == AdvancedPinDisplay))
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{
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AdvancedPinDisplay = ENodeAdvancedPins::Hidden;
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}
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K2Schema->SetPinDefaultValue(Pin, Function, Param);
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if (PinsToHide.Contains(Pin->PinName))
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{
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Pin->bHidden = true;
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Pin->DefaultValue = TEXT("0");
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}
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}
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bAllPinsGood = bAllPinsGood && bPinGood;
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}
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}
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Super::AllocateDefaultPins();
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}
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struct FBaseAsyncTaskHelper
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{
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static bool ValidDataPin(const UEdGraphPin* Pin, EEdGraphPinDirection Direction, const UEdGraphSchema_K2* Schema)
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{
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check(Schema);
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const bool bValidDataPin = Pin
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&& (Pin->PinName != Schema->PN_Execute)
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&& (Pin->PinName != Schema->PN_Then)
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&& (Pin->PinType.PinCategory != Schema->PC_Exec);
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const bool bProperDirection = Pin && (Pin->Direction == Direction);
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return bValidDataPin && bProperDirection;
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}
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static bool CreateDelegateForNewFunction(UEdGraphPin* DelegateInputPin, FName FunctionName, UK2Node* CurrentNode, UEdGraph* SourceGraph, FKismetCompilerContext& CompilerContext)
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{
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const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
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check(DelegateInputPin && Schema && CurrentNode && SourceGraph && (FunctionName != NAME_None));
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bool bResult = true;
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// WORKAROUND, so we can create delegate from nonexistent function by avoiding check at expanding step
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// instead simply: Schema->TryCreateConnection(AddDelegateNode->GetDelegatePin(), CurrentCENode->FindPinChecked(UK2Node_CustomEvent::DelegateOutputName));
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UK2Node_Self* SelfNode = CompilerContext.SpawnIntermediateNode<UK2Node_Self>(CurrentNode, SourceGraph);
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SelfNode->AllocateDefaultPins();
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UK2Node_CreateDelegate* CreateDelegateNode = CompilerContext.SpawnIntermediateNode<UK2Node_CreateDelegate>(CurrentNode, SourceGraph);
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CreateDelegateNode->AllocateDefaultPins();
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bResult &= Schema->TryCreateConnection(DelegateInputPin, CreateDelegateNode->GetDelegateOutPin());
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bResult &= Schema->TryCreateConnection(SelfNode->FindPinChecked(Schema->PN_Self), CreateDelegateNode->GetObjectInPin());
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CreateDelegateNode->SetFunction(FunctionName);
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return bResult;
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}
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struct FOutputPinAndLocalVariable
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{
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UEdGraphPin* OutputPin;
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UK2Node_TemporaryVariable* TempVar;
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FOutputPinAndLocalVariable(UEdGraphPin* Pin, UK2Node_TemporaryVariable* Var) : OutputPin(Pin), TempVar(Var) {}
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};
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static bool CopyEventSignature(UK2Node_CustomEvent* CENode, UFunction* Function, const UEdGraphSchema_K2* Schema)
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{
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check(CENode && Function && Schema);
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bool bResult = true;
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for (TFieldIterator<UProperty> PropIt(Function); PropIt && (PropIt->PropertyFlags & CPF_Parm); ++PropIt)
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{
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const UProperty* Param = *PropIt;
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if (!Param->HasAnyPropertyFlags(CPF_OutParm) || Param->HasAnyPropertyFlags(CPF_ReferenceParm))
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{
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FEdGraphPinType PinType;
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bResult &= Schema->ConvertPropertyToPinType(Param, /*out*/ PinType);
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bResult &= (NULL != CENode->CreateUserDefinedPin(Param->GetName(), PinType));
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}
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}
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return bResult;
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}
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static bool HandleDelegateImplementation(
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UMulticastDelegateProperty* CurrentProperty, const TArray<FBaseAsyncTaskHelper::FOutputPinAndLocalVariable>& VariableOutputs,
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UEdGraphPin* ProxyObjectPin, UEdGraphPin*& InOutLastThenPin,
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UK2Node* CurrentNode, UEdGraph* SourceGraph, FKismetCompilerContext& CompilerContext)
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{
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bool bIsErrorFree = true;
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const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
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check(CurrentProperty && ProxyObjectPin && InOutLastThenPin && CurrentNode && SourceGraph && Schema);
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UEdGraphPin* PinForCurrentDelegateProperty = CurrentNode->FindPin(CurrentProperty->GetName());
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if (!PinForCurrentDelegateProperty || (Schema->PC_Exec != PinForCurrentDelegateProperty->PinType.PinCategory))
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{
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FText ErrorMessage = FText::Format(LOCTEXT("WrongDelegateProperty", "BaseAsyncTask: Cannot find execution pin for delegate "), FText::FromString(CurrentProperty->GetName()));
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CompilerContext.MessageLog.Error(*ErrorMessage.ToString(), CurrentNode);
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return false;
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}
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UK2Node_CustomEvent* CurrentCENode = CompilerContext.SpawnIntermediateNode<UK2Node_CustomEvent>(CurrentNode, SourceGraph);
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{
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UK2Node_AddDelegate* AddDelegateNode = CompilerContext.SpawnIntermediateNode<UK2Node_AddDelegate>(CurrentNode, SourceGraph);
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AddDelegateNode->SetFromProperty(CurrentProperty, false);
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AddDelegateNode->AllocateDefaultPins();
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bIsErrorFree &= Schema->TryCreateConnection(AddDelegateNode->FindPinChecked(Schema->PN_Self), ProxyObjectPin);
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bIsErrorFree &= Schema->TryCreateConnection(InOutLastThenPin, AddDelegateNode->FindPinChecked(Schema->PN_Execute));
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InOutLastThenPin = AddDelegateNode->FindPinChecked(Schema->PN_Then);
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CurrentCENode->CustomFunctionName = *FString::Printf(TEXT("%s_%s"), *CurrentProperty->GetName(), *CurrentCENode->NodeGuid.ToString());
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CurrentCENode->AllocateDefaultPins();
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bIsErrorFree &= FBaseAsyncTaskHelper::CreateDelegateForNewFunction(AddDelegateNode->GetDelegatePin(), CurrentCENode->GetFunctionName(), CurrentNode, SourceGraph, CompilerContext);
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bIsErrorFree &= FBaseAsyncTaskHelper::CopyEventSignature(CurrentCENode, AddDelegateNode->GetDelegateSignature(), Schema);
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}
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UEdGraphPin* LastActivatedNodeThen = CurrentCENode->FindPinChecked(Schema->PN_Then);
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for (auto OutputPair : VariableOutputs) // CREATE CHAIN OF ASSIGMENTS
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{
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UEdGraphPin* PinWithData = CurrentCENode->FindPin(OutputPair.OutputPin->PinName);
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if (PinWithData == NULL)
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{
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FText ErrorMessage = FText::Format(LOCTEXT("MissingDataPin", "ICE: Pin @@ was expecting a data output pin named {0} on @@ (each delegate must have the same signature)"), FText::FromString(OutputPair.OutputPin->PinName));
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CompilerContext.MessageLog.Error(*ErrorMessage.ToString(), OutputPair.OutputPin, CurrentCENode);
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return false;
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}
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UK2Node_AssignmentStatement* AssignNode = CompilerContext.SpawnIntermediateNode<UK2Node_AssignmentStatement>(CurrentNode, SourceGraph);
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AssignNode->AllocateDefaultPins();
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bIsErrorFree &= Schema->TryCreateConnection(LastActivatedNodeThen, AssignNode->GetExecPin());
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bIsErrorFree &= Schema->TryCreateConnection(OutputPair.TempVar->GetVariablePin(), AssignNode->GetVariablePin());
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AssignNode->NotifyPinConnectionListChanged(AssignNode->GetVariablePin());
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bIsErrorFree &= Schema->TryCreateConnection(AssignNode->GetValuePin(), PinWithData);
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AssignNode->NotifyPinConnectionListChanged(AssignNode->GetValuePin());
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LastActivatedNodeThen = AssignNode->GetThenPin();
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}
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bIsErrorFree &= CompilerContext.MovePinLinksToIntermediate(*PinForCurrentDelegateProperty, *LastActivatedNodeThen).CanSafeConnect();
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return bIsErrorFree;
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}
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};
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void UK2Node_BaseAsyncTask::ExpandNode(class FKismetCompilerContext& CompilerContext, UEdGraph* SourceGraph)
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{
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Super::ExpandNode(CompilerContext, SourceGraph);
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if (!CompilerContext.bIsFullCompile)
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{
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return;
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}
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const UEdGraphSchema_K2* Schema = CompilerContext.GetSchema();
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check(SourceGraph && Schema);
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bool bIsErrorFree = true;
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// Create a call to factory the proxy object
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UK2Node_CallFunction* const CallCreateProxyObjectNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
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CallCreateProxyObjectNode->FunctionReference.SetExternalMember(ProxyFactoryFunctionName, ProxyFactoryClass);
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CallCreateProxyObjectNode->AllocateDefaultPins();
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bIsErrorFree &= CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(Schema->PN_Execute), *CallCreateProxyObjectNode->FindPinChecked(Schema->PN_Execute)).CanSafeConnect();
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for (auto CurrentPin : Pins)
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{
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if (FBaseAsyncTaskHelper::ValidDataPin(CurrentPin, EGPD_Input, Schema))
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{
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UEdGraphPin* DestPin = CallCreateProxyObjectNode->FindPin(CurrentPin->PinName); // match function inputs, to pass data to function from CallFunction node
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bIsErrorFree &= DestPin && CompilerContext.MovePinLinksToIntermediate(*CurrentPin, *DestPin).CanSafeConnect();
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}
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}
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// GATHER OUTPUT PARAMETERS AND PAIR THEM WITH LOCAL VARIABLES
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TArray<FBaseAsyncTaskHelper::FOutputPinAndLocalVariable> VariableOutputs;
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for (auto CurrentPin : Pins)
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{
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if (FBaseAsyncTaskHelper::ValidDataPin(CurrentPin, EGPD_Output, Schema))
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{
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const FEdGraphPinType& PinType = CurrentPin->PinType;
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UK2Node_TemporaryVariable* TempVarOutput = CompilerContext.SpawnInternalVariable(
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this, PinType.PinCategory, PinType.PinSubCategory, PinType.PinSubCategoryObject.Get(), PinType.bIsArray);
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bIsErrorFree &= TempVarOutput->GetVariablePin() && CompilerContext.MovePinLinksToIntermediate(*CurrentPin, *TempVarOutput->GetVariablePin()).CanSafeConnect();
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VariableOutputs.Add(FBaseAsyncTaskHelper::FOutputPinAndLocalVariable(CurrentPin, TempVarOutput));
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}
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}
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// FOR EACH DELEGATE DEFINE EVENT, CONNECT IT TO DELEGATE AND IMPLEMENT A CHAIN OF ASSIGMENTS
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UEdGraphPin* LastThenPin = CallCreateProxyObjectNode->FindPinChecked(Schema->PN_Then);
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UEdGraphPin* const ProxyObjectPin = CallCreateProxyObjectNode->GetReturnValuePin();
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for (TFieldIterator<UMulticastDelegateProperty> PropertyIt(ProxyClass, EFieldIteratorFlags::ExcludeSuper); PropertyIt && bIsErrorFree; ++PropertyIt)
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{
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bIsErrorFree &= FBaseAsyncTaskHelper::HandleDelegateImplementation(*PropertyIt, VariableOutputs, ProxyObjectPin, LastThenPin, this, SourceGraph, CompilerContext);
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}
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if (CallCreateProxyObjectNode->FindPinChecked(Schema->PN_Then) == LastThenPin)
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{
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CompilerContext.MessageLog.Error(*LOCTEXT("MissingDelegateProperties", "BaseAsyncTask: Proxy has no delegates defined. @@").ToString(), this);
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return;
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}
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// Create a call to activate the proxy object if necessary
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if (ProxyActivateFunctionName != NAME_None)
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{
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UK2Node_CallFunction* const CallActivateProxyObjectNode = CompilerContext.SpawnIntermediateNode<UK2Node_CallFunction>(this, SourceGraph);
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CallActivateProxyObjectNode->FunctionReference.SetExternalMember(ProxyActivateFunctionName, ProxyClass);
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CallActivateProxyObjectNode->AllocateDefaultPins();
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// Hook up the self connection
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UEdGraphPin* ActivateCallSelfPin = Schema->FindSelfPin(*CallActivateProxyObjectNode, EGPD_Input);
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check(ActivateCallSelfPin);
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bIsErrorFree &= Schema->TryCreateConnection(ProxyObjectPin, ActivateCallSelfPin);
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// Hook the activate node up in the exec chain
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UEdGraphPin* ActivateExecPin = CallActivateProxyObjectNode->FindPinChecked(Schema->PN_Execute);
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UEdGraphPin* ActivateThenPin = CallActivateProxyObjectNode->FindPinChecked(Schema->PN_Then);
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bIsErrorFree &= Schema->TryCreateConnection(LastThenPin, ActivateExecPin);
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LastThenPin = ActivateThenPin;
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}
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// Move the connections from the original node then pin to the last internal then pin
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bIsErrorFree &= CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(Schema->PN_Then), *LastThenPin).CanSafeConnect();
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if (!bIsErrorFree)
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{
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CompilerContext.MessageLog.Error(*LOCTEXT("InternalConnectionError", "BaseAsyncTask: Internal connection error. @@").ToString(), this);
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}
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// Make sure we caught everything
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BreakAllNodeLinks();
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}
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bool UK2Node_BaseAsyncTask::HasExternalBlueprintDependencies(TArray<class UStruct*>* OptionalOutput) const
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{
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const UBlueprint* SourceBlueprint = GetBlueprint();
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const bool bProxyFactoryResult = (ProxyFactoryClass != NULL) && (ProxyFactoryClass->ClassGeneratedBy != NULL) && (ProxyFactoryClass->ClassGeneratedBy != SourceBlueprint);
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if (bProxyFactoryResult && OptionalOutput)
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{
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OptionalOutput->Add(ProxyFactoryClass);
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}
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const bool bProxyResult = (ProxyClass != NULL) && (ProxyClass->ClassGeneratedBy != NULL) && (ProxyClass->ClassGeneratedBy != SourceBlueprint);
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if (bProxyResult && OptionalOutput)
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{
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OptionalOutput->Add(ProxyClass);
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}
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return bProxyFactoryResult || bProxyResult || Super::HasExternalBlueprintDependencies(OptionalOutput);
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}
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FName UK2Node_BaseAsyncTask::GetCornerIcon() const
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{
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return TEXT("Graph.Latent.LatentIcon");
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}
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UFunction* UK2Node_BaseAsyncTask::GetFactoryFunction() const
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{
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check(ProxyFactoryClass);
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UFunction* FactoryFunction = ProxyFactoryClass->FindFunctionByName(ProxyFactoryFunctionName);
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check(FactoryFunction);
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return FactoryFunction;
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}
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#undef LOCTEXT_NAMESPACE
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