bug #34165 [PropertyInfo] Fixed type extraction for nullable collections of non-nullable elements (happyproff)

This PR was squashed before being merged into the 4.3 branch (closes #34165).

Discussion
----------

[PropertyInfo] Fixed type extraction for nullable collections of non-nullable elements

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

When an annotation is declared as `int[]|null`, it is handled like `(int|null)[]|null`. So array values are also nullable.

Now this behavior is fixed that `int[]|null` is either a collection of integers only or null.

How to reproduce:
```php
class Dummy
{
    /** @var int[]|null */
    public $nullableCollectionOfNonNullableElements;
}

/** @var Type[] $types */
$types = (new PhpDocExtractor())->getTypes(Dummy::class, 'nullableCollectionOfNonNullableElements');

$collectionType = $types[0];
assert($collectionType->isCollection() === true); // OK
assert($collectionType->isNullable() === true); // OK
assert($collectionType->getCollectionValueType()->getBuiltinType() === Type::BUILTIN_TYPE_INT); // OK
assert($collectionType->getCollectionValueType()->isNullable() === false); // FAILED
```

Commits
-------

5e394c40f0 [PropertyInfo] Fixed type extraction for nullable collections of non-nullable elements

src/Symfony/Component/PropertyInfo/Tests/Extractor/PhpDocExtractorTest.php

@@ -90,6 +90,7 @@ class PhpDocExtractorTest extends TestCase
             ['h', [new Type(Type::BUILTIN_TYPE_STRING, true)], null, null],
             ['i', [new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)], null, null],
             ['j', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')], null, null],
+            ['nullableCollectionOfNonNullableElements', [new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_INT, false))], null, null],
             ['donotexist', null, null, null],
             ['staticGetter', null, null, null],
             ['staticSetter', null, null, null],
@@ -174,6 +175,7 @@ class PhpDocExtractorTest extends TestCase
             ['h', [new Type(Type::BUILTIN_TYPE_STRING, true)], null, null],
             ['i', [new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)], null, null],
             ['j', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')], null, null],
+            ['nullableCollectionOfNonNullableElements', [new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_INT, false))], null, null],
             ['donotexist', null, null, null],
             ['staticGetter', null, null, null],
             ['staticSetter', null, null, null],
@@ -214,6 +216,7 @@ class PhpDocExtractorTest extends TestCase
             ['h', [new Type(Type::BUILTIN_TYPE_STRING, true)], null, null],
             ['i', [new Type(Type::BUILTIN_TYPE_STRING, true), new Type(Type::BUILTIN_TYPE_INT, true)], null, null],
             ['j', [new Type(Type::BUILTIN_TYPE_OBJECT, true, 'DateTime')], null, null],
+            ['nullableCollectionOfNonNullableElements', [new Type(Type::BUILTIN_TYPE_ARRAY, true, null, true, new Type(Type::BUILTIN_TYPE_INT), new Type(Type::BUILTIN_TYPE_INT, false))], null, null],
             ['donotexist', null, null, null],
             ['staticGetter', null, null, null],
             ['staticSetter', null, null, null],

src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php

@@ -51,6 +51,7 @@ class ReflectionExtractorTest extends TestCase
                 'h',
                 'i',
                 'j',
+                'nullableCollectionOfNonNullableElements',
                 'emptyVar',
                 'iteratorCollection',
                 'iteratorCollectionWithKey',
@@ -97,6 +98,7 @@ class ReflectionExtractorTest extends TestCase
                 'h',
                 'i',
                 'j',
+                'nullableCollectionOfNonNullableElements',
                 'emptyVar',
                 'iteratorCollection',
                 'iteratorCollectionWithKey',
@@ -133,6 +135,7 @@ class ReflectionExtractorTest extends TestCase
                 'h',
                 'i',
                 'j',
+                'nullableCollectionOfNonNullableElements',
                 'emptyVar',
                 'iteratorCollection',
                 'iteratorCollectionWithKey',

src/Symfony/Component/PropertyInfo/Tests/Fixtures/Dummy.php

@@ -93,6 +93,11 @@ class Dummy extends ParentDummy
      */
     public $j;
 
+    /**
+     * @var int[]|null
+     */
+    public $nullableCollectionOfNonNullableElements;
+
     /**
      * @var array
      */

src/Symfony/Component/PropertyInfo/Util/PhpDocTypeHelper.php

@@ -114,7 +114,7 @@ final class PhpDocTypeHelper
                 $collectionValueType = null;
             } else {
                 $collectionKeyType = new Type(Type::BUILTIN_TYPE_INT);
-                $collectionValueType = $this->createType($type, $nullable, substr($docType, 0, -2));
+                $collectionValueType = $this->createType($type, false, substr($docType, 0, -2));
             }
 
             return new Type(Type::BUILTIN_TYPE_ARRAY, $nullable, null, true, $collectionKeyType, $collectionValueType);