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.

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).

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Last updated on: August 6, 2002