variable/3

variable(+Name, +Type, +Access)

variable(+Name, +Type, +Access, +Doc)

Declare an instance variable. Normally placed immediately after the pce_begin_class/[2,3] call to declare the additional slots (attributes) of the class. The arguments are:

Name -- Name of the instance variable. Must be unique for this class (it cannot already be used in the super-class).
Type -- Type specification of permitted values. See Types.
Access -- Access for the send and get operations. Valid values are:
- none -- no access (only via Object<->slot).
- get -- may be fetched with get/3; can be set only via Object->slot.
- send -- may be set with send/3; can be fetched only via Object<-slot (rarely useful).
- both -- may be set with send/3 and fetched with get/3.
Doc -- optional summary documentation of the variable, visible in the manual tool.