FValueId | Unreal Engine 5.7 Documentation

A 12-byte value that uniquely identifies a value in the context that it was created.


Name	FValueId
Type	struct
Header File	/Engine/Source/Developer/DerivedDataCache/Public/DerivedDataValueId.h
Include Path	#include "DerivedDataValueId.h"

Syntax

struct FValueId

Name	Remarks	Include Path
FValueId ()	Construct a null ID.	DerivedDataValueId.h
FValueId ( const ByteArray& Id )	Construct an ID from an array of 12 bytes.	DerivedDataValueId.h
FValueId ( FMemoryView Id )	Construct an ID from a view of 12 bytes.	DerivedDataValueId.h
FValueId ( const FCbObjectId& Id )	Construct an ID from a Compact Binary Object ID.	DerivedDataValueId.h

Name	Type	Remarks	Include Path
ByteArray	uint8[12]		DerivedDataValueId.h

Name	Type	Remarks	Include Path
Null	const FValueId	A null ID.	DerivedDataValueId.h

Name	Type	Remarks	Include Path	Unreal Specifiers
Bytes	ByteArray		DerivedDataValueId.h

Name	Remarks	Include Path
const ByteArray & GetBytes()	Returns a reference to the raw byte array for the ID.	DerivedDataValueId.h
FMemoryView GetView()	Returns a view of the raw byte array for the ID.	DerivedDataValueId.h
bool IsNull()	Whether this is null.	DerivedDataValueId.h
bool IsValid()	Whether this is not null.	DerivedDataValueId.h
FValueId MakeIndexed ( int32 Index ) const	Returns a copy of this ID with the last 4 bytes replaced by the index. Use for arrays of values.	DerivedDataValueId.h
void Reset()	Reset this to null.	DerivedDataValueId.h

Name	Remarks	Include Path
static FValueId FromHash ( const FIoHash& Hash )	Construct an ID from a non-zero hash.	DerivedDataValueId.h
static FValueId FromName ( FUtf8StringView Name )	Construct an ID from a non-empty name.	DerivedDataValueId.h
static FValueId FromName ( FWideStringView Name )		DerivedDataValueId.h

Name	Remarks	Include Path	Unreal Specifiers
operator FCbObjectId()	Returns the ID as a Compact Binary Object ID.	DerivedDataValueId.h