Allow union types as datatype of parameters in @method annotations.

Author: ThomasNunninger

src/Annotation/MethodAnnotation.php

@@ -94,7 +94,14 @@ public function parameters() : array
     private function parseParametersString(string $parametersString) : ?array
     {
         $parameterPattern = '/^' .
-                                '((' . self::PATTERN_DATA_TYPE . ') )?' .   // optional datatype plus space
+                                '(' .                                       // optional datatype (union type allowed) plus space
+                                    '(' .
+                                        '(' .
+                                            self::PATTERN_DATA_TYPE . preg_quote('|') .
+                                        ')*' .
+                                        self::PATTERN_DATA_TYPE .
+                                    ') ' .
+                                ')?' .
                                 '(' . self::PATTERN_VARIABLE_NAME . ')' .   // parameter name
                                 '( = ' .                                    // optional default value
                                     '(' .
@@ -112,19 +119,19 @@ private function parseParametersString(string $parametersString) : ?array
                 return null;
             }
 
-            $parameterName = $matches[6];
+            $parameterName = $matches[9];
             $dataType = $matches[2] ?: null;
-            $hasDefaultValue = '' !== $matches[8];
+            $hasDefaultValue = '' !== $matches[11];
             $parameters[$parameterName] = [
                 'dataType' => $dataType,
                 'hasDefaultValue' => $hasDefaultValue,
             ];
 
             if ($hasDefaultValue) {
-                $parameters[$parameterName]['default'] = $matches[8];
+                $parameters[$parameterName]['default'] = $matches[11];
             }
 
-            $parametersString = array_key_exists(12, $matches) ? $matches[12] : '';
+            $parametersString = array_key_exists(15, $matches) ? $matches[15] : '';
         }
 
         return $parameters;

tests/PhpUnit/Annotation/MethodAnnotationTest.php

@@ -179,6 +179,35 @@ final class MethodAnnotationTest extends AbstractAnnotationTestCase
             [],
             'int|null',
             false,
+        ],
+        [
+            'foo(string|null $parameter)',
+            'foo',
+            [
+                'parameter' => [
+                    'dataType' => 'string|null',
+                    'hasDefaultValue' => false,
+                ],
+            ],
+            null,
+            false,
+        ],
+        [
+            'int|null foo(string|null $parameter = "defaultValue", $secondParameter)',
+            'foo',
+            [
+                'parameter' => [
+                    'dataType' => 'string|null',
+                    'hasDefaultValue' => true,
+                    'default' => '"defaultValue"',
+                ],
+                'secondParameter' => [
+                    'dataType' => null,
+                    'hasDefaultValue' => false,
+                ]
+            ],
+            'int|null',
+            false,
         ]
     ];