The IDL_Object::_overloadPlusPlus procedure method defines the behavior of the increment (++) operator for instances of objects that inherit from the IDL_Object class.

Object classes that inherit from the IDL_Object class but that do not override this method will throw an error if you attempt to use the ++ operator.

Example

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For an example of how to implement this method, see the BigInteger class in the file lib/datatypes/biginteger__define.pro in your IDL installation.

Syntax

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In most cases, this method is called indirectly by specifying an object reference as an argument on either the left or right side of the ++ operator. When called explicitly, the syntax is:

Obj->[IDL_Object::]_overloadPlusPlus

Arguments

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None

Keywords

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None

Routine Signature

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To overload the ++ operator for an object class, implement a method with the following signature:

PRO class::_overloadPlusPlus

Inside this method you should write code that defines the increment operator for your class.

Note: There are two different forms of the increment operator: pre-increment (++a) and post-increment (a++). See the IDL_Object::_overloadPostIncrementCopy method for details on how to handle the two forms.

Version History

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8.4.1

Introduced

See Also

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IDL_Object::_overloadMinusMinus, IDL_Object::_overloadPostIncrementCopy, Increment/Decrement operators