iterable (PHP 7.1 internal union type) should be recognized as "special" in parameter generation code

Author: Ocramius

test/Generator/ParameterGeneratorTest.php

@@ -16,6 +16,7 @@
 use ZendTest\Code\TestAsset\DocBlockOnlyHintsClass;
 use ZendTest\Code\TestAsset\EmptyClass;
 use ZendTest\Code\TestAsset\InternalHintsClass;
+use ZendTest\Code\TestAsset\IterableHintsClass;
 use ZendTest\Code\TestAsset\NullableHintsClass;
 use ZendTest\Code\TestAsset\NullNullableDefaultHintsClass;
 use ZendTest\Code\TestAsset\VariadicParametersClass;
@@ -450,6 +451,9 @@ public function reflectionHintsProvider()
             [DocBlockOnlyHintsClass::class, 'selfParameter', 'foo', null],
             [DocBlockOnlyHintsClass::class, 'classParameter', 'foo', null],
             [DocBlockOnlyHintsClass::class, 'otherClassParameter', 'foo', null],
+            [IterableHintsClass::class, 'iterableParameter', 'foo', 'iterable'],
+            [IterableHintsClass::class, 'nullableIterableParameter', 'foo', '?iterable'],
+            [IterableHintsClass::class, 'nullDefaultIterableParameter', 'foo', '?iterable'],
         ];
 
         $compatibleParameters = array_filter(