Support null values across all property types.

src/Formatter/ArrayBasedFormatter.php

@@ -28,10 +28,10 @@ public function rootField(Serializer|Deserializer $serializer, string $type): Fi
     /**
      * @param array<string, mixed> $runningValue
      * @param Field $field
-     * @param int $next
+     * @param int|null $next
      * @return array<string, mixed>
      */
-    public function serializeInt(mixed $runningValue, Field $field, int $next): array
+    public function serializeInt(mixed $runningValue, Field $field, ?int $next): array
     {
         $runningValue[$field->serializedName] = $next;
         return $runningValue;
@@ -40,10 +40,10 @@ public function serializeInt(mixed $runningValue, Field $field, int $next): arra
     /**
      * @param array<string, mixed> $runningValue
      * @param Field $field
-     * @param float $next
+     * @param float|null $next
      * @return array<string, mixed>
      */
-    public function serializeFloat(mixed $runningValue, Field $field, float $next): array
+    public function serializeFloat(mixed $runningValue, Field $field, ?float $next): array
     {
         $runningValue[$field->serializedName] = $next;
         return $runningValue;
@@ -64,10 +64,10 @@ public function serializeString(mixed $runningValue, Field $field, ?string $next
     /**
      * @param array<string, mixed> $runningValue
      * @param Field $field
-     * @param bool $next
+     * @param bool|null $next
      * @return array<string, mixed>
      */
-    public function serializeBool(mixed $runningValue, Field $field, bool $next): array
+    public function serializeBool(mixed $runningValue, Field $field, ?bool $next): array
     {
         $runningValue[$field->serializedName] = $next;
         return $runningValue;

src/Formatter/Formatter.php

@@ -20,13 +20,13 @@ public function serializeInitialize(ClassSettings $classDef, Field $rootField):
 
     public function serializeFinalize(mixed $runningValue, ClassSettings $classDef): mixed;
 
-    public function serializeInt(mixed $runningValue, Field $field, int $next): mixed;
+    public function serializeInt(mixed $runningValue, Field $field, ?int $next): mixed;
 
-    public function serializeFloat(mixed $runningValue, Field $field, float $next): mixed;
+    public function serializeFloat(mixed $runningValue, Field $field, ?float $next): mixed;
 
     public function serializeString(mixed $runningValue, Field $field, ?string $next): mixed;
 
-    public function serializeBool(mixed $runningValue, Field $field, bool $next): mixed;
+    public function serializeBool(mixed $runningValue, Field $field, ?bool $next): mixed;
 
     public function serializeSequence(mixed $runningValue, Field $field, Sequence $next, Serializer $serializer): mixed;
 

src/Formatter/StreamFormatter.php

@@ -26,13 +26,13 @@ public function serializeFinalize(mixed $runningValue, ClassSettings $classDef):
         return $runningValue;
     }
 
-    public function serializeInt(mixed $runningValue, Field $field, int $next): mixed
+    public function serializeInt(mixed $runningValue, Field $field, ?int $next): mixed
     {
         $runningValue->write((string)$next);
         return $runningValue;
     }
 
-    public function serializeFloat(mixed $runningValue, Field $field, float $next): mixed
+    public function serializeFloat(mixed $runningValue, Field $field, ?float $next): mixed
     {
         $runningValue->write((string)$next);
         return $runningValue;
@@ -44,7 +44,7 @@ public function serializeString(mixed $runningValue, Field $field, ?string $next
         return $runningValue;
     }
 
-    public function serializeBool(mixed $runningValue, Field $field, bool $next): mixed
+    public function serializeBool(mixed $runningValue, Field $field, ?bool $next): mixed
     {
         $runningValue->write($next ? 'true' : 'false');
         return $runningValue;

tests/ArrayBasedFormatterTest.php

@@ -436,6 +436,10 @@ public function null_stuff_validate(mixed $serialized): void
     {
         $toTest = $this->arrayify($serialized);
 
-        self::assertNull($toTest['examples']);
+        self::assertNull($toTest['int']);
+        self::assertNull($toTest['float']);
+        self::assertNull($toTest['string']);
+        self::assertNull($toTest['array']);
+        self::assertNull($toTest['object']);
     }
 }

tests/Records/NullProps.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Crell\Serde\Records;
+
+class NullProps
+{
+    public function __construct(
+        public ?int $int = null,
+        public ?float $float = null,
+        public ?string $string = null,
+        public ?array $array = null,
+        public ?NullProps $object = null,
+    ) {}
+}

tests/SerdeTest.php

@@ -45,7 +45,7 @@
 use Crell\Serde\Records\NestedFlattenObject;
 use Crell\Serde\Records\NestedObject;
 use Crell\Serde\Records\NullArrays;
-use Crell\Serde\Records\NullProp;
+use Crell\Serde\Records\NullProps;
 use Crell\Serde\Records\OptionalPoint;
 use Crell\Serde\Records\Pagination\DetailedResults;
 use Crell\Serde\Records\Pagination\NestedPagination;
@@ -1558,20 +1558,24 @@ public function scopes_examples(): iterable
     /**
      * @test
      */
-    public function null_stuff(): void
+    public function nullable_null_properties_are_allowed(): void
     {
         $s = new SerdeCommon(formatters: $this->formatters);
 
-        $data = new NullProp(null);
+        $data = new NullProps();
 
         $serialized = $s->serialize($data, $this->format);
 
         $this->null_stuff_validate($serialized);
 
-        /** @var NullProp $result */
+        /** @var NullProps $result */
         $result = $s->deserialize($serialized, from: $this->format, to: $data::class);
 
-        self::assertNull($result->examples);
+        self::assertNull($result->int);
+        self::assertNull($result->float);
+        self::assertNull($result->string);
+        self::assertNull($result->array);
+        self::assertNull($result->object);
 
         self::assertEquals($data, $result);
     }