Add support for numerically indexed array generics.

Author: fa-dis

custom-standards/Flyeralarm/Sniffs/Docblock/ReturnTypeSniff.php

@@ -160,6 +160,11 @@ private function checkReturnTypeShape(string $subject)
                 }
 
                 $match = trim($match);
+                if (strpos($match, 'int,') === 0) {
+                    // Allow numeric indexing in generics, e.g. `array<int, string>`
+                    $match = substr($match, 4);
+                }
+
                 if ($match === '') {
                     throw new \InvalidArgumentException('Generic specification may not be empty in type "' . $matches[0][$index] . '"');
                 }

tests/rules/doc/allowed/ReturnTypeArrayGenerics.php

@@ -20,6 +20,13 @@ public function testWithGeneric()
     {
     }
 
+    /**
+     * @return array<int, string>
+     */
+    public function testWithNumericIndex()
+    {
+    }
+
     /**
      * @return array<string | int>
      */