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API > API/Runtime > API/Runtime/Core > API/Runtime/Core/Math > API/Runtime/Core/Math/TValueOrError
References
| Module | Core |
| Header | /Engine/Source/Runtime/Core/Public/Templates/ValueOrError.h |
| Include | #include "Templates/ValueOrError.h" |
bool IsValid&40;&41; const
Remarks
Check whether a value is set. Prefer HasValue and HasError to this. !IsValid() does not imply HasError().