RAD Studio VCL Reference
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EVariantInvalidNullOpError Class
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EVariantInvalidNullOpError is the exception class for invalid Null variant operations.

Class Hierarchy
Pascal
EVariantInvalidNullOpError = class(EVariantInvalidOpError);
C++
class EVariantInvalidNullOpError : public EVariantInvalidOpError;
File

Variants

Description

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.
 

See Also
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