FValue | Unreal Engine 5.6 Documentation | Epic Developer Community

A value is a compressed buffer identified by its raw hash and raw size.

A value without data may be used as a reference to the value.


Name	FValue
Type	class
Header File	/Engine/Source/Developer/DerivedDataCache/Public/DerivedDataValue.h
Include Path	#include "DerivedDataValue.h"

Syntax

class FValue

Name	Remarks	Include Path
FValue ()	Construct a null value, which is a hash and size of zero with no data.	DerivedDataValue.h
FValue ( const FCompressedBuffer& Data )	Construct a value from a compressed buffer, which is cloned if not owned.	DerivedDataValue.h
FValue ( FCompressedBuffer&& Data )		DerivedDataValue.h
FValue ( const FIoHash& RawHash, uint64 RawSize )	Construct a value reference from the hash and size of its data.	DerivedDataValue.h

Name	Type	Remarks	Include Path
Null	const FValue	A null value.	DerivedDataValue.h

Name	Type	Include Path
Data	FCompressedBuffer	DerivedDataValue.h
RawHash	FIoHash	DerivedDataValue.h
RawSize	uint64	DerivedDataValue.h

Name	Remarks	Include Path
const FCompressedBuffer & GetData()	Returns the compressed buffer for the value. May be null.	DerivedDataValue.h
const FIoHash & GetRawHash()	Returns the hash of the raw buffer (uncompressed) for the value.	DerivedDataValue.h
uint64 GetRawSize()	Returns the size of the raw buffer (uncompressed) for the value.	DerivedDataValue.h
bool HasData()	Whether the compressed buffer for the value is available.	DerivedDataValue.h
FValue RemoveData()	Create a copy of the value with the data removed.	DerivedDataValue.h
void Reset()	Reset this to null.	DerivedDataValue.h

Name	Remarks	Include Path	Unreal Specifiers
static FValue Compress ( const FCompositeBuffer& RawData, uint64 BlockSize )	Compress the buffer to a value using default derived data compression parameters.	DerivedDataValue.h
static FValue Compress ( const FSharedBuffer& RawData, uint64 BlockSize )		DerivedDataValue.h