Node:Method Additions, Next:Parameter Passing to New Objects, Previous:Object Creation, Up:Obj Dynamic

Method Additions

+SomeObject :: asserta(+SomeMethod)

+SomeObject :: assertz(+SomeMethod)

+SomeObject :: assert(+SomeMethod)

Asserts SomeMethod in SomeObject with normal Prolog semantics.

Add some facts to vehicle and truck with initial value equal to [].

| ?- vehicle :: assert(fuel_level([])),
     vehicle :: assert(oil_level([])),
     vehicle :: assert(location([])),
     truck :: assert(capacity([])),
     truck :: assert(total_weight([])).