retractall/1

Description

retractall(Head)

Retracts all matching predicates from an object.

Template and modes

retractall(+callable)

Errors

Head is a variable:

instantiation_error

Head is neither a variable nor a callable term:

type_error(callable, Head)

The predicate indicator of Head is that of a private predicate:

permission_error(modify, private_predicate, Head)

The predicate indicator of Head is that of a protected predicate:

permission_error(modify, protected_predicate, Head)

The predicate indicator of Head is that of a static predicate:

permission_error(modify, static_predicate, Head)

The predicate indicator of Head is not declared:

existence_error(predicate_declaration, Head)

Examples

To retract all matching predicate definitions in this:

retractall(Head)

To retract all matching public or protected predicate definitions in self:

::retractall(Head)

To retract all matching public predicate definitions in an object:

Object::retractall(Head)