System.Variants.EVariantInvalidNullOpError
Delphi
EVariantInvalidNullOpError = class(EVariantInvalidOpError);
C++
class PASCALIMPLEMENTATION EVariantInvalidNullOpError : public EVariantInvalidOpError
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| class | public | System.Variants.pas System.Variants.hpp |
System.Variants | System.Variants |
Description
EVariantInvalidNullOpError is the exception class for invalid Null variant operations.
EVariantInvalidNullOpError is raised when a variant operation fails because the operation is not valid for Null variants. To raise this exception programmatically, call VarInvalidNullOp.
Note: Do not raise EVariantInvalidNullOpError unless NullEqualityRule or NullMagnitudeRule is ncrError, and a corresponding operation has been attempted.