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Unreal Engine C++ API Reference > Developer > DerivedDataCache
Inheritance Hierarchy
References
Module | DerivedDataCache |
Header | /Engine/Source/Developer/DerivedDataCache/Public/DerivedDataValue.h |
Include | #include "DerivedDataValue.h" |
Syntax
class FValueWithId : public [UE::DerivedData::FValue](API\Developer\DerivedDataCache\FValue)
Remarks
A value with an ID. Null if both ID and value are null.
May have a null value with a non-null ID. A non-null value must have a non-null ID.
Constructors
Type | Name | Description |
---|---|---|
FValueWithId () | Construct a null value. | |
FValueWithId ( const FValueId& Id, ArgTypes&&... Args ) | Construct a value with a non-null ID and forward the other args to FValue(). |
Functions
Type | Name | Description |
---|---|---|
const FValue... | GetId () | Returns the ID for the value. |
bool | IsNull () | Whether this is null. |
bool | IsValid () | Whether this is not null. |
FValueWithId | RemoveData () | Create a copy of the value with the data removed. |
void | Reset () | Reset this to null. |
Operators
Type | Name | Description |
---|---|---|
operator bool () | Whether this is not null. |
Constants
Name | Description |
---|---|
Null | A null value with a null ID. |