Verify using anonymous classes work

See php/php-src#6746 (comment)

Author: thekid

src/test/php/lang/ast/unittest/emit/InitializeWithExpressionsTest.class.php

@@ -50,6 +50,19 @@ public function run() {
     Assert::equals(new Handle(1), $r(new Handle(0)));
   }
 
+  #[Test]
+  public function using_anonymous_classes() {
+    $r= $this->run('class <T> {
+      private $h= new class() { public function pipe($h) { return $h->redirect(1); } };
+
+      public function run() {
+        return $this->h;
+      }
+    }');
+    Assert::equals(new Handle(1), $r->pipe(new Handle(0)));
+  }
+
+
   #[Test]
   public function property_initialization_accessible_inside_constructor() {
     $r= $this->run('use lang\ast\unittest\emit\Handle; class <T> {