Add extends declaration for Macroable classes to fix missing inherited methods (#1674)

resources/views/helper.php

@@ -29,7 +29,7 @@ $s3 = $s1 . $s2;
 <?php foreach ($namespaces_by_extends_ns as $namespace => $aliases) : ?>
 namespace <?= $namespace === '__root' ? '' : trim($namespace, '\\') ?> {
     <?php foreach ($aliases as $alias) : ?>
-<?php echo trim($alias->getDocComment($s1)) . "\n{$s1}" . $alias->getClassType() ?> <?= $alias->getExtendsClass() ?> {
+<?php echo trim($alias->getDocComment($s1)) . "\n{$s1}" . $alias->getClassType() ?> <?= $alias->getExtendsClass() ?><?php if($alias->shouldExtendParentClass()): ?> extends <?= $alias->getParentClass() ?><?php endif; ?> {
         <?php foreach ($alias->getMethods() as $method) : ?>
 <?= trim($method->getDocComment($s2)) . "\n{$s2}" ?>public static function <?= $method->getName() ?>(<?= $method->getParamsWithDefault() ?>)
         {<?php if ($method->getDeclaringClass() !== $method->getRoot()) : ?>

src/Alias.php

@@ -36,6 +36,7 @@ class Alias
     protected $classType = 'class';
     protected $short;
     protected $namespace = '__root';
+    protected $parentClass;
     protected $root = null;
     protected $classes = [];
     protected $methods = [];
@@ -87,6 +88,7 @@ class Alias
         $this->detectNamespace();
         $this->detectClassType();
         $this->detectExtendsNamespace();
+        $this->detectParentClass();
 
         if (!empty($this->namespace)) {
             try {
@@ -171,6 +173,25 @@ class Alias
         return $this->extendsNamespace;
     }
 
+    /**
+     * Get the parent class of the class which this alias extends
+     *
+     * @return null|string
+     */
+    public function getParentClass()
+    {
+        return $this->parentClass;
+    }
+
+    /**
+     * Check if this class should extend the parent class
+     */
+    public function shouldExtendParentClass()
+    {
+        return $this->parentClass
+            && $this->getExtendsNamespace() !== '\\Illuminate\\Support\\Facades';
+    }
+
     /**
      * Get the Alias by which this class is called
      *
@@ -268,6 +289,18 @@ class Alias
         }
     }
 
+    /**
+     * Detect the parent class
+     */
+    protected function detectParentClass()
+    {
+        $reflection = new ReflectionClass($this->root);
+
+        $parentClass = $reflection->getParentClass();
+
+        $this->parentClass = $parentClass ? '\\' . $parentClass->getName() : null;
+    }
+
     /**
      * Detect the class type
      */