Enums do not have side effects

moodle/Sniffs/Files/MoodleInternalSniff.php

@@ -294,7 +294,7 @@ private function count_artifacts(File $file) {
         $position = 0;
         $counter = 0;
         while ($position !== false) {
-            if ($position = $file->findNext([T_CLASS, T_INTERFACE, T_TRAIT], ($position + 1))) {
+            if ($position = $file->findNext([T_CLASS, T_INTERFACE, T_TRAIT, T_ENUM], ($position + 1))) {
                 $counter++;
             }
 
@@ -316,7 +316,13 @@ private function count_artifacts(File $file) {
      */
     private function code_changes_global_state(File $file, $start, $end) {
         $tokens = $file->getTokens();
-        $symbols = [T_CLASS => T_CLASS, T_INTERFACE => T_INTERFACE, T_TRAIT => T_TRAIT, T_FUNCTION => T_FUNCTION];
+        $symbols = [
+            T_CLASS => T_CLASS,
+            T_INTERFACE => T_INTERFACE,
+            T_TRAIT => T_TRAIT,
+            T_FUNCTION => T_FUNCTION,
+            T_ENUM => T_ENUM,
+        ];
         $conditions = [T_IF => T_IF, T_ELSE   => T_ELSE, T_ELSEIF => T_ELSEIF];
 
         for ($i = $start; $i <= $end; $i++) {

moodle/Tests/FilesMoodleInternalTest.php

@@ -82,6 +82,17 @@ public function test_moodle_files_moodleinternal_declare_ok() {
         $this->verify_cs_results();
     }
 
+    public function test_moodle_files_moodleinternal_enum_ok() {
+        $this->set_standard('moodle');
+        $this->set_sniff('moodle.Files.MoodleInternal');
+        $this->set_fixture(__DIR__ . '/fixtures/files/moodleinternal/enum_ok.php');
+
+        $this->set_errors([]);
+        $this->set_warnings([]);
+
+        $this->verify_cs_results();
+    }
+
     public function test_moodle_files_moodleinternal_namespace_ok() {
         $this->set_standard('moodle');
         $this->set_sniff('moodle.Files.MoodleInternal');

moodle/Tests/fixtures/files/moodleinternal/enum_ok.php

@@ -0,0 +1,29 @@
+<?php
+declare(strict_types=1);
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Chart line.
+ *
+ * @package    core
+ * @copyright  2016 Frédéric Massart - FMCorz.net
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+enum example: string {
+    case one = 'one';
+    case two = 'two';
+    case three = 'three';
+}