Use interfaces instead of abstract class for Twig extensions.

VERSION

@@ -1 +1 @@
-0.2503.260138
+0.2504.11235

composer.lock

@@ -976,16 +976,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "2.1.8",
+            "version": "2.1.11",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "f9adff3b87c03b12cc7e46a30a524648e497758f"
+                "reference": "8ca5f79a8f63c49b2359065832a654e1ec70ac30"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/f9adff3b87c03b12cc7e46a30a524648e497758f",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/8ca5f79a8f63c49b2359065832a654e1ec70ac30",
-                "reference": "f9adff3b87c03b12cc7e46a30a524648e497758f",
+                "reference": "8ca5f79a8f63c49b2359065832a654e1ec70ac30",
                 "shasum": ""
             },
             "require": {
@@ -1030,7 +1030,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2025-03-09T09:30:48+00:00"
+            "time": "2025-03-24T13:45:00+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -1356,16 +1356,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "12.0.9",
+            "version": "12.0.10",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "7835bb4276780e0bbb385ce0a777b839e03096db"
+                "reference": "6075843014de23bcd6992842d69ca99d25d6a433"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/7835bb4276780e0bbb385ce0a777b839e03096db",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/6075843014de23bcd6992842d69ca99d25d6a433",
-                "reference": "7835bb4276780e0bbb385ce0a777b839e03096db",
+                "reference": "6075843014de23bcd6992842d69ca99d25d6a433",
                 "shasum": ""
             },
             "require": {
@@ -1433,7 +1433,7 @@
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
                 "security": "https://github.com/sebastianbergmann/phpunit/security/policy",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/12.0.9"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/12.0.10"
             },
             "funding": [
                 {
@@ -1449,7 +1449,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2025-03-19T13:47:33+00:00"
+            "time": "2025-03-23T16:03:59+00:00"
         },
         {
             "name": "sebastian/cli-parser",

src/Templating/Extension/TplExtensionCommon.php

@@ -0,0 +1,65 @@
+<?php
+// TplExtensionCommon.php
+// Created: 2025-04-01
+// Updated: 2025-04-01
+
+namespace Index\Templating\Extension;
+
+use ReflectionClass;
+use Twig\Node\Expression\Binary\AbstractBinary;
+use Twig\Node\Expression\Unary\AbstractUnary;
+use Twig\NodeVisitor\NodeVisitorInterface;
+use Twig\TokenParser\TokenParserInterface;
+use Twig\{ExpressionParser,OperatorPrecedenceChange,TwigFilter,TwigFunction,TwigTest};
+
+/**
+ * Provides common implementations of the Twig extension methods so you can yoink them without having to extend AbstractExtension.
+ */
+trait TplExtensionCommon {
+    /** @return TokenParserInterface[] */
+    public function getTokenParsers() {
+        return [];
+    }
+
+    /** @return NodeVisitorInterface[] */
+    public function getNodeVisitors() {
+        return [];
+    }
+
+    /** @return TwigFilter[] */
+    public function getFilters() {
+        return [];
+    }
+
+    /** @return TwigTest[] */
+    public function getTests() {
+        return [];
+    }
+
+    /** @return TwigFunction[] */
+    public function getFunctions() {
+        return [];
+    }
+
+    /**
+     * @return array{
+     *  array<string, array{precedence: int, precedence_change?: OperatorPrecedenceChange, class: class-string<AbstractUnary>}>,
+     *  array<string, array{precedence: int, precedence_change?: OperatorPrecedenceChange, class?: class-string<AbstractBinary>, associativity: ExpressionParser::OPERATOR_*}>
+     * }
+     */
+    public function getOperators() {
+        return [[], []];
+    }
+
+    public function getLastModified(): int {
+        $path = (new ReflectionClass($this))->getFileName();
+        if($path === false || !is_file($path))
+            return 0;
+
+        $time = filemtime($path);
+        if($time === false)
+            return 0;
+
+        return $time;
+    }
+}

src/Templating/Extension/TplIndexExtension.php

@@ -1,24 +1,28 @@
 <?php
 // TplIndexExtension.php
 // Created: 2024-08-04
-// Updated: 2024-10-04
+// Updated: 2025-04-01
 
 namespace Index\Templating\Extension;
 
 use Index\{ByteFormat,Index};
 use Twig\{Environment,TwigFilter,TwigFunction};
-use Twig\Extension\AbstractExtension;
+use Twig\Extension\LastModifiedExtensionInterface;
 
 /**
  * Provides version functions and additional functionality implemented in Index.
  */
-class TplIndexExtension extends AbstractExtension {
+class TplIndexExtension implements LastModifiedExtensionInterface {
+    use TplExtensionCommon;
+
+    #[\Override]
     public function getFilters() {
         return [
             new TwigFilter('format_filesize', ByteFormat::format(...)),
         ];
     }
 
+    #[\Override]
     public function getFunctions() {
         return [
             new TwigFunction('ndx_version', Index::version(...)),