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  3. FKismetCompilerUtilities

FKismetCompilerUtilities

This is a loose collection of utilities used when 'compiling' a new [UClass](API\Runtime\CoreUObject\UObject\UClass) from a K2 graph.

Unreal Engine C++ API Reference > Editor > KismetCompiler

References

   
Module KismetCompiler
Header /Engine/Source/Editor/KismetCompiler/Public/KismetCompilerMisc.h
Include #include "KismetCompilerMisc.h"

Syntax

class FKismetCompilerUtilities

Remarks

This is a loose collection of utilities used when 'compiling' a new UClass from a K2 graph.

Functions

  Type Name Description
Public function Static bool

CheckFunctionCompiledStatementsThreadSafety ( const UEdGraphNode* InNode,
const UEdGraph* InSourceGraph,
const TArray< FBlueprintCompiledStatement* >& InStatements,
FCompilerResultsLog& InMessageLog,
bool InbEmitErrors,
TSet< const FBPTerminal* >* InThreadSafeObjectTerms
)

 Helper function used by CheckFunctionThreadSafety. Split out to allow the ability to examine individual compiled statement lists (e.g. for the ubergraph)
Public function Static bool

CheckFunctionThreadSafety ( const FKismetFunctionContext& InContext,
FCompilerResultsLog& InMessageLog,
bool InbEmitErrors
)

 Check the passed-in function to verify its thread safety. This makes sure that it only uses/calls thread-safe functions/nodes.
Public function Static FFieldVariant

CheckPropertyNameOnScope ( UStruct* Scope,
const FName& PropertyName
)

 Checks that the property name isn't taken in the given scope (used by CreatePropertyOnScope())
Public function Static void  
Public function Static void

ConsignToOblivion ( UClass* OldClass,
bool bForceNoResetLoaders
)

 Rename a class and it's CDO into the transient package, and clear RF_Public on both of them.
Public function Static void Create Kismet assignment statement with proper object <-> interface cast
Public function Static FProperty *

CreatePrimitiveProperty ( FFieldVariant PropertyScope,
const FName& ValidatedPropertyName,
const FName& PinCategory,
const FName& PinSubCategory,
UObject* PinSubCategoryObject,
UClass* SelfClass,
bool bIsWeakPointer,
const UEdGraphSchema_K2* Schema,
FCompilerResultsLog& MessageLog
)

 Helper function for creating property for primitive types.
Public function Static FProperty *

CreatePropertyOnScope ( UStruct* Scope,
const FName& PropertyName,
const FEdGraphPinType& Type,
UClass* SelfClass,
EPropertyFlags PropertyFlags,
const UEdGraphSchema_K2* Schema,
FCompilerResultsLog& MessageLog,
UEdGraphPin* SourcePin
)

 Creates a property named PropertyName of type PropertyType in the Scope or returns NULL if the type is unknown, but does not link that property in
Public function Static void

DetectValuesReturnedByRef ( const UFunction* Func,
const UK2Node* Node,
FCompilerResultsLog& MessageLog
)

 Generate an error for non-const output parameters
Public function Static ConvertibleSignatureMatchResult

DoSignaturesHaveConvertibleFloatTypes ( const UFunction* SourceFunction,
const UFunction* OtherFunction
)

 Similar to UFunction::IsSignatureCompatibleWith, but also checks if the function signatures are convertible.
Public function Static FProperty *

FindNamedPropertyInScope ( UStruct* Scope,
FName PropertyName,
bool& bIsSparseProperty,
const bool bAllowDeprecated
)

 Finds a property by name, starting in the specified scope, returning NULL if it's not found.
Public function Static const UFunction *

FindOverriddenImplementableEvent ( const FName& EventName,
const UClass* Class
)

 Return function, that overrides BlueprintImplementableEvent with given name in given class (super-classes are not considered)
Public function Static FProperty *

FindPropertyInScope ( UStruct* Scope,
UEdGraphPin* Pin,
FCompilerResultsLog& MessageLog,
const UEdGraphSchema_K2* Schema,
UClass* SelfClass,
bool& bIsSparseProperty
)

 Finds a property by name, starting in the specified scope; Validates property type and returns NULL along with emitting an error if there is a mismatch.
Public function Static TArray< TSet< UEdGraphNode * > > Find groups of nodes, that can be executed separately.
Public function Static UEdGraphPin *

GenerateAssignmentNodes ( FKismetCompilerContext& CompilerContext,
UEdGraph* SourceGraph,
UK2Node_CallFunction* CallBeginSpawnNode,
UEdGraphNode* SpawnNode,
UEdGraphPin* CallBeginResult,
const UClass* ForClass
)

 Create 'set var by name' nodes and hook them up - used to set values when components are added or actor are created at run time.
Public function Static TTuple< UEdGraphPin *, UEdGraphPin * >

GenerateBroadcastFieldNotificationNode ( FKismetCompilerContext& CompilerContext,
UEdGraph* SourceGraph,
UEdGraphNode* SourceNode,
FProperty* Property
)

 Create node to broadcast a FieldNotification value changed
Public function Static TTuple< UEdGraphPin *, UEdGraphPin * >

GenerateFieldNotificationSetNode ( FKismetCompilerContext& CompilerContext,
UEdGraph* SourceGraph,
UEdGraphNode* SourceNode,
UEdGraphPin* SelfPin,
FProperty* VariableProperty,
const FMemberReference& VariableReference,
bool bHasLocalRepNotify,
bool bShouldFlushDormancyOnSet,
bool bIsNetProperty
)

 Create node that replace regular setter and use the SetPropertyValueAndBroadcast.
Public function Static bool

IsIntermediateFunctionGraphTrivial ( FName FunctionName,
const UEdGraph* FunctionGraph
)

  
Public function Static bool

IsMissingMemberPotentiallyLoading ( const UBlueprint* SelfBlueprint,
const UStruct* MemberOwner
)

 Intended to avoid errors that come from checking for external member (function, variable, etc.) dependencies.
Public function Static bool  
Public function Static bool

IsStatementReducible ( EKismetCompiledStatementType StatementType
)

  
Public function Static bool

IsTypeCompatibleWithProperty ( UEdGraphPin* SourcePin,
FProperty* Property,
FCompilerResultsLog& MessageLog,
const UEdGraphSchema_K2* Schema,
UClass* SelfClass
)

 Tests to see if a pin is schema compatible with a property.
Public function Static void

LinkAddedProperty ( UStruct* Structure,
FProperty* NewProperty
)

  
Public function Static void

RemoveObjectRedirectorIfPresent ( UObject* Package,
const FString& ClassName,
UObject* ObjectBeingMovedIn
)

  
Public function Static void  
Public function Static void Add this BP to any BPs that it in
Public function Static void

ValidateEnumProperties ( const UObject* DefaultObject,
FCompilerResultsLog& MessageLog
)

 Checks if enum variables from given object store proper indexes
Public function Static void Checks if each execution path ends with a Return node
Public function Static bool Checks if the specified pin can default to self

Constants

Name Description
ConsignToOblivionCounter Counter to ensure unique names in the transient package, to avoid GC collection issues with classes and their CDOs

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