10.22.6.12 define_method/3

Synopsis

define_method(+Obj, +Message, +Body)

Arguments

Obj

object

Message

term

Body

callable

Description

Installs Body as the method for Message in the instance Obj. Following the execution of this goal, sending Message to Obj will execute Body, rather than the default method or a method previously defined with define_method/3.

Message must have been declared to be an instance method for the class of Obj.

Exceptions

instantiation_error

any argument is unbound.

type_error

Obj is not a compound term, or Message or Body is not callable.

domain_error

Message does not specify an instance method for the class of Obj, or Body include a goal to fetch or store a non-existent slot.

See Also

instance_method/1, undefine_method/3