extends_object/2-3

Description

extends_object(Prototype, Parent)

extends_object(Prototype, Parent, Scope)

Enumerates, by backtracking, all pairs of objects such that the first one extends the second.

Template and modes

extends_object(?object_identifier, ?object_identifier)

extends_object(?object_identifier, ?object_identifier, ?scope)

Errors

Prototype is neither a variable nor a valid object identifier:

type_error(object_identifier, Prototype)

Parent is neither a variable nor a valid object identifier:

type_error(object_identifier, Parent)

Scope is neither a variable nor a valid entity scope:

type_error(scope, Scope)

Examples

| ?- extends_object(Object, state_space).

| ?- extends_object(Object, list, public).

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Last updated on: August 6, 2002