Avoid parameters

AVOID is a Class instance called AISNULL. This instance has different properties, one for every data type. The values of these properties are always Null. In the future, an assignment will be possible without changing its value (it is the equivalent of a (void) cast on a function in C, when the return value must be ignored). But this is not yet usable.

The purpose of this instance is to enable declaring a "Void" parameter whenever a variable argument is expected in calls that are set in the Classes or Representation dictionaries. If the user does not need the return value sent by the call, no null constant is allowed and a variable is mandatory. In this case, using 'AVOID.PROPERTY' with a Property of the expected data type is accepted. This prevents the development partner from declaring and managing a variable that will not be used.

The properties present in the instance are summarized as follows:

Property name	Data type
ACHAR	Character string
ASHORT	Short integer
AINT	Integer
ADEC	Decimal number
ADATE	Date
ALIB	Local menu (byte value). Deprecated, to be replaced by ATINYINT
ATINYINT	Byte value
ACLOB	CLOB (large character file)
ABLOB	BLOB (large binary file)
AINS	Instance pointer
AUUIDENT	Unique ID
ADATTIM	Date time