object

lcom_metric

Lack of Cohesion Of Methods metric (LCOM4).

Availability:

logtalk_load(code_metrics(loader))

Author: Paulo Moura

Version: 1:0:0

Date: 2026-03-30

Compilation flags:

static, context_switching_calls

Imports:

public code_metrics_utilities

public code_metric

Provides:

logtalk::message_tokens//2

Uses:

list

logtalk

Remarks:

• Score computation: Computes the number of connected components in the undirected graph whose nodes are the locally defined predicates and whose edges represent direct internal calls between them.

• Score interpretation: A score of 1 indicates a fully cohesive entity. Higher scores indicate that the entity may benefit from being split. Protocols are not scored as they cannot define predicates.

• Score representation: The score is represented by the compound term lcom(Components, Predicates) where Components is the number of connected components and Predicates is the total number of locally defined (non-auxiliary) predicates.

Inherited public predicates:

 all/0  all/1  all_score/1  check_option/1  check_options/1  default_option/1  default_options/1  directory/1  directory/2  directory_score/2  entity/1  entity_score/2  file/1  file/2  file_score/2  format_entity_score//2  library/1  library/2  library_score/2  option/2  option/3  rdirectory/1  rdirectory/2  rdirectory_score/2  rlibrary/1  rlibrary/2  rlibrary_score/2  valid_option/1  valid_options/1

Public predicates

(no local declarations; see entity ancestors if any)

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)