Node:Handling Slot Access Errors, Previous:Class Slots, Up:Accessing Slots
GOOPS calls one of the following generic functions when a "slot-ref" or "slot-set!" call specifies a non-existent slot name, or tries to reference a slot whose value is unbound.
| slot-missing | generic |
| slot-missing (class <class>) slot-name | method |
| slot-missing (class <class>) (object <object>) slot-name | method |
| slot-missing (class <class>) (object <object>) slot-name value | method |
When an application attempts to reference or set a class or instance
slot by name, and the slot name is invalid for the specified class
or object, GOOPS calls the slot-missing generic function.
The default methods all call |
| slot-unbound | generic |
| slot-unbound (object <object>) | method |
| slot-unbound (class <class>) slot-name | method |
| slot-unbound (class <class>) (object <object>) slot-name | method |
When an application attempts to reference a class or instance slot, and
the slot's value is unbound, GOOPS calls the slot-unbound generic
function.
The default methods all call |