[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'Variants' (#rtl)

TCustomVariantType.IsClear

Is the custom value unassigned ?

Declaration

Source position: variants.pp line 199

public function TCustomVariantType.IsClear(

  const V: TVarData

):Boolean; virtual;

Arguments

V

  

Custom variant to test

Function result

True if the custom variant V is unassigned

Description

IsClear must be overridden to decide whether the custom variant V is equivalent to varClear (unassigned) value. The VarIsClear function calls this method to decide whether a custom variant is unassigned.

The TCustomVariantType implementation of IsClear always returns False.

See also

VarIsClear

  

Check if a variant is clear


Documentation generated on: Jun 22 2020