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API > API/Developer > API/Developer/DerivedDataCache
References
| Module | DerivedDataCache |
| Header | /Engine/Source/Developer/DerivedDataCache/Public/DerivedDataValueId.h |
| Include | #include "DerivedDataValueId.h" |
Syntax
struct FValueId
Remarks
A 12-byte value that uniquely identifies a value in the context that it was created.
Constructors
| Type | Name | Description | |
|---|---|---|---|
 |
FValueId () |
Construct a null ID. | |
 |
Construct an ID from an array of 12 bytes. | ||
 |
FValueId
(
FMemoryView Id |
Construct an ID from a view of 12 bytes. | |
 |
FValueId
(
const FCbObjectId& Id |
Construct an ID from a Compact Binary Object ID. |
Functions
| Type | Name | Description | |
|---|---|---|---|
  |
FValueId | Construct an ID from a non-zero hash. | |
  |
FValueId | FromName
(
FUtf8StringView Name |
Construct an ID from a non-empty name. |
  |
FValueId | FromName
(
FWideStringView Name |
|
  |
const ByteArray & | GetBytes () |
Returns a reference to the raw byte array for the ID. |
  |
FMemoryView | GetView () |
Returns a view of the raw byte array for the ID. |
  |
bool | IsNull () |
Whether this is null. |
  |
bool | IsValid () |
Whether this is not null. |
  |
FValueId | MakeIndexed
(
int32 Index |
Returns a copy of this ID with the last 4 bytes replaced by the index. Use for arrays of values. |
 |
void | Reset () |
Reset this to null. |
Operators
| Type | Name | Description | |
|---|---|---|---|
  |
Returns the ID as a Compact Binary Object ID. |
Typedefs
| Name | Description |
|---|---|
| ByteArray |
Constants
| Name | Description |
|---|---|
| Null | A null ID. |