extends_protocol/2-3

Description

extends_protocol(Protocol1, Protocol2)

extends_protocol(Protocol1, Protocol2, Scope)

Enumerates, by backtracking, all pairs of protocols such that the first one extends the second. The relation scope is represented by the atoms public, protected, and private.

Template and modes

extends_protocol(?protocol_identifier, ?protocol_identifier)

extends_protocol(?protocol_identifier, ?protocol_identifier, ?scope)

Errors

Protocol1 is neither a variable nor a valid protocol identifier:

type_error(protocol_identifier, Protocol1)

Protocol2 is neither a variable nor a valid protocol identifier:

type_error(protocol_identifier, Protocol2)

Scope is neither a variable nor a valid entity scope:

type_error(scope, Scope)

Examples

| ?- extends_protocol(listp, Protocol).

| ?- extends_protocol(Protocol, termp, private).