.. index:: single: lcom_metric
.. _lcom_metric/0:

.. rst-class:: right

**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`` :ref:`code_metrics_utilities <code_metrics_utilities/0>`
|    ``public`` :ref:`code_metric <code_metric/0>`
| **Provides:**
|    :ref:`logtalk::message_tokens//2 <logtalk/0::message_tokens//2>`
| **Uses:**
|    :ref:`list <list/0>`
|    :ref:`logtalk <logtalk/0>`

| **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:**
|     :ref:`code_metric/0::all/0`  :ref:`code_metric/0::all/1`  :ref:`code_metric/0::all_score/1`  :ref:`options_protocol/0::check_option/1`  :ref:`options_protocol/0::check_options/1`  :ref:`options_protocol/0::default_option/1`  :ref:`options_protocol/0::default_options/1`  :ref:`code_metric/0::directory/1`  :ref:`code_metric/0::directory/2`  :ref:`code_metric/0::directory_score/2`  :ref:`code_metric/0::entity/1`  :ref:`code_metric/0::entity_score/2`  :ref:`code_metric/0::file/1`  :ref:`code_metric/0::file/2`  :ref:`code_metric/0::file_score/2`  :ref:`code_metric/0::format_entity_score//2`  :ref:`code_metric/0::library/1`  :ref:`code_metric/0::library/2`  :ref:`code_metric/0::library_score/2`  :ref:`options_protocol/0::option/2`  :ref:`options_protocol/0::option/3`  :ref:`code_metric/0::rdirectory/1`  :ref:`code_metric/0::rdirectory/2`  :ref:`code_metric/0::rdirectory_score/2`  :ref:`code_metric/0::rlibrary/1`  :ref:`code_metric/0::rlibrary/2`  :ref:`code_metric/0::rlibrary_score/2`  :ref:`options_protocol/0::valid_option/1`  :ref:`options_protocol/0::valid_options/1`  

.. contents::
   :local:
   :backlinks: top

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)