Represents a reference to a slot method.

An operand of this data type is intended to store a reference to a slot method of an object. The slots and signals provide a simple mechanism for communication between the objects. Sending a signal to a slot causes the corresponding slot method to be executed.

The slot literal can be null only to explicitly identify 'no slot'. The literal can be used within expressions wherever slot operand is expected. The type name slot, in turn, is designated to be used in declarations of data members. For example:

You can use a slot operand to send signals to the referenced slot method. Sending a signal causes the method to be executed. Chora provides following statement to send signals:

Statement	Short description
signal	Send a signal to a slot.
postsignal	Post a signal to a slot.
idlesignal	Post a signal to a slot.
notifyobservers	Notify registered observers.

You can compare two slot operands in order to test whether these refer to the same slot or not. The following table provides an overview of the possible operations:

Operator	Short description
==	Equality test for two slot operands.
!=	Inequality test for two slot operands.