Added interface RuntimeDataDescriber

build/generate-runtime-enum-serializers.php

@@ -64,8 +64,8 @@ function buildWriterFunc(string $virtualTypeName, string $nativeTypeName, array
 	$bits = getBitsRequired($memberNames);
 	$lines = [];
 
-	$lines[] = "public function $functionName(\\$nativeTypeName \$value) : void{";
+	$lines[] = "public function $functionName(\\$nativeTypeName &\$value) : void{";
-	$lines[] = "\t\$this->int($bits, match(\$value){";
+	$lines[] = "\t\$this->writeInt($bits, match(\$value){";
 
 	foreach($memberNames as $key => $memberName){
 		$lines[] = "\t\t$memberName => $key,";
@@ -101,6 +101,10 @@ function buildReaderFunc(string $virtualTypeName, string $nativeTypeName, array
 	return $lines;
 }
 
+function buildInterfaceFunc(string $nativeTypeName, string $functionName) : string{
+	return "public function $functionName(\\$nativeTypeName &\$value) : void;";
+}
+
 /**
  * @param mixed[] $members
  */
@@ -143,9 +147,10 @@ $readerFuncs = [
 ];
 $writerFuncs = [
 	"" => [
-		"abstract public function int(int \$bits, int \$value) : void;"
+		"abstract protected function writeInt(int \$bits, int \$value) : void;"
 	]
 ];
+$interfaceFuncs = [];
 
 foreach($enumsUsed as $enumMembers){
 	if(count($enumMembers) === 0){
@@ -169,13 +174,17 @@ foreach($enumsUsed as $enumMembers){
 		$stringifiedMembers,
 		$functionName
 	);
+	$interfaceFuncs[$functionName] = [buildInterfaceFunc(
+		$nativeTypeName,
+		$functionName
+	)];
 }
 
 /**
  * @param string[][] $functions
  * @phpstan-param array<string, list<string>> $functions
  */
-function printFunctions(array $functions, string $className) : void{
+function printFunctions(array $functions, string $className, string $classType) : void{
 	ksort($functions, SORT_STRING);
 
 	ob_start();
@@ -213,14 +222,15 @@ namespace pocketmine\data\runtime;
 
 HEADER;
 
-	echo "trait $className{\n\n";
+	echo "$classType $className{\n\n";
 	echo implode("\n\n", array_map(fn(array $functionLines) => "\t" . implode("\n\t", $functionLines), $functions));
 	echo "\n\n}\n";
 
 	file_put_contents(dirname(__DIR__) . '/src/data/runtime/' . $className . '.php', ob_get_clean());
 }
 
-printFunctions($writerFuncs, "RuntimeEnumSerializerTrait");
+printFunctions($writerFuncs, "RuntimeEnumSerializerTrait", "trait");
-printFunctions($readerFuncs, "RuntimeEnumDeserializerTrait");
+printFunctions($readerFuncs, "RuntimeEnumDeserializerTrait", "trait");
+printFunctions($interfaceFuncs, "RuntimeEnumDescriber", "interface");
 
 echo "Done. Don't forget to run CS fixup after generating code.\n";

src/block/Anvil.php

@@ -28,8 +28,7 @@ use pocketmine\block\utils\Fallable;
 use pocketmine\block\utils\FallableTrait;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\object\FallingBlock;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
@@ -54,13 +53,13 @@ class Anvil extends Transparent implements Fallable{
 
 	public function getRequiredTypeDataBits() : int{ return 2; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(2, self::UNDAMAGED, self::VERY_DAMAGED, $this->damage);
 	}
 
 	public function getRequiredStateDataBits() : int{ return 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 	}
 

src/block/Bamboo.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\StructureGrowEvent;
 use pocketmine\item\Bamboo as ItemBamboo;
 use pocketmine\item\Fertilizer;
@@ -58,7 +57,7 @@ class Bamboo extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(2, self::NO_LEAVES, self::LARGE_LEAVES, $this->leafSize);
 		$w->bool($this->thick);
 		$w->bool($this->ready);

src/block/BambooSapling.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\StructureGrowEvent;
 use pocketmine\item\Bamboo as ItemBamboo;
 use pocketmine\item\Fertilizer;
@@ -39,7 +38,7 @@ final class BambooSapling extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->ready);
 	}
 

src/block/Barrel.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\tile\Barrel as TileBarrel;
 use pocketmine\block\utils\AnyFacingTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Facing;
 use pocketmine\math\Vector3;
@@ -41,7 +40,7 @@ class Barrel extends Opaque{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->facing($this->facing);
 		$w->bool($this->open);
 	}

src/block/Bed.php

@@ -28,8 +28,7 @@ use pocketmine\block\utils\ColoredTrait;
 use pocketmine\block\utils\DyeColor;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\entity\Living;
 use pocketmine\item\Item;
@@ -56,7 +55,7 @@ class Bed extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->occupied);
 		$w->bool($this->head);

src/block/Bedrock.php

@@ -23,15 +23,14 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 class Bedrock extends Opaque{
 	private bool $burnsForever = false;
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->burnsForever);
 	}
 

src/block/Bell.php

@@ -27,8 +27,7 @@ use pocketmine\block\tile\Bell as TileBell;
 use pocketmine\block\utils\BellAttachmentType;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\projectile\Projectile;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
@@ -51,7 +50,7 @@ final class Bell extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bellAttachmentType($this->attachmentType);
 		$w->horizontalFacing($this->facing);
 	}

src/block/Block.php

@@ -29,6 +29,7 @@ namespace pocketmine\block;
 use pocketmine\block\tile\Spawnable;
 use pocketmine\block\tile\Tile;
 use pocketmine\block\utils\SupportType;
+use pocketmine\data\runtime\RuntimeDataDescriber;
 use pocketmine\data\runtime\RuntimeDataReader;
 use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
@@ -174,7 +175,7 @@ class Block{
 		$stateBits = $this->getRequiredStateDataBits();
 		$requiredBits = $typeBits + $stateBits;
 		$writer = new RuntimeDataWriter($requiredBits);
-		$writer->int($typeBits, $this->computeTypeData());
+		$writer->writeInt($typeBits, $this->computeTypeData());
 
 		$this->describeState($writer);
 		$writtenBits = $writer->getOffset() - $typeBits;
@@ -185,11 +186,11 @@ class Block{
 		return $writer->getValue();
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		//NOOP
 	}
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		//NOOP
 	}
 

src/block/BrewingStand.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\tile\BrewingStand as TileBrewingStand;
 use pocketmine\block\utils\BrewingStandSlot;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\AxisAlignedBB;
@@ -46,7 +45,7 @@ class BrewingStand extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->brewingStandSlots($this->slots);
 	}
 

src/block/Button.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\AnyFacingTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Facing;
 use pocketmine\math\Vector3;
@@ -41,7 +40,7 @@ abstract class Button extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->facing($this->facing);
 		$w->bool($this->pressed);
 	}

src/block/Cactus.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\event\block\BlockGrowEvent;
 use pocketmine\event\entity\EntityDamageByBlockEvent;
@@ -44,7 +43,7 @@ class Cactus extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(4, 0, self::MAX_AGE, $this->age);
 	}
 

src/block/Cake.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\item\ItemBlock;
 use pocketmine\math\AxisAlignedBB;
@@ -39,7 +38,7 @@ class Cake extends BaseCake{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, 0, self::MAX_BITES, $this->bites);
 	}
 

src/block/Candle.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\CandleTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\AxisAlignedBB;
@@ -51,7 +50,7 @@ class Candle extends Transparent{
 		return 3;
 	}
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$this->encodeLitState($w);
 		$w->boundedInt(2, self::MIN_COUNT, self::MAX_COUNT, $this->count);
 	}

src/block/ChorusFlower.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\projectile\Projectile;
 use pocketmine\event\block\StructureGrowEvent;
 use pocketmine\item\Item;
@@ -52,7 +51,7 @@ final class ChorusFlower extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataWriter|RuntimeDataReader $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, self::MIN_AGE, self::MAX_AGE, $this->age);
 	}
 

src/block/CocoaBlock.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
 use pocketmine\block\utils\WoodType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\BlockGrowEvent;
 use pocketmine\item\Fertilizer;
 use pocketmine\item\Item;
@@ -49,7 +48,7 @@ class CocoaBlock extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->boundedInt(2, 0, self::MAX_AGE, $this->age);
 	}

src/block/Crops.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\BlockGrowEvent;
 use pocketmine\item\Fertilizer;
 use pocketmine\item\Item;
@@ -41,7 +40,7 @@ abstract class Crops extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, 0, self::MAX_AGE, $this->age);
 	}
 

src/block/DaylightSensor.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\AnalogRedstoneSignalEmitterTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -44,7 +43,7 @@ class DaylightSensor extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 5; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(4, 0, 15, $this->signalStrength);
 		$w->bool($this->inverted);
 	}

src/block/DetectorRail.php

@@ -23,15 +23,14 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 class DetectorRail extends StraightOnlyRail{
 	protected bool $activated = false;
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		parent::describeState($w);
 		$w->bool($this->activated);
 	}

src/block/Dirt.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\DirtType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Fertilizer;
 use pocketmine\item\Hoe;
 use pocketmine\item\Item;
@@ -48,7 +47,7 @@ class Dirt extends Opaque{
 
 	public function getRequiredTypeDataBits() : int{ return 2; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->dirtType($this->dirtType);
 	}
 

src/block/Door.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -44,7 +43,7 @@ class Door extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 5; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->top);
 		$w->bool($this->hingeRight);

src/block/DoublePlant.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Facing;
 use pocketmine\math\Vector3;
@@ -36,7 +35,7 @@ class DoublePlant extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->top);
 	}
 

src/block/EndPortalFrame.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\FacesOppositePlacingPlayerTrait;
 use pocketmine\block\utils\HorizontalFacingTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
 
@@ -38,7 +37,7 @@ class EndPortalFrame extends Opaque{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->eye);
 	}

src/block/Farmland.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\entity\Living;
 use pocketmine\event\entity\EntityTrampleFarmlandEvent;
@@ -40,7 +39,7 @@ class Farmland extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, 0, self::MAX_WETNESS, $this->wetness);
 	}
 

src/block/FenceGate.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
 use pocketmine\block\utils\WoodTypeTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -45,7 +44,7 @@ class FenceGate extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->open);
 		$w->bool($this->inWall);

src/block/FillableCauldron.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -42,7 +41,7 @@ abstract class FillableCauldron extends Transparent{
 		return 3;
 	}
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, self::MIN_FILL_LEVEL, self::MAX_FILL_LEVEL, $this->fillLevel);
 	}
 

src/block/Fire.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\BlockBurnEvent;
 use pocketmine\event\block\BlockSpreadEvent;
 use pocketmine\math\Facing;
@@ -42,7 +41,7 @@ class Fire extends BaseFire{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(4, 0, self::MAX_AGE, $this->age);
 	}
 

src/block/FloorCoralFan.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\item\VanillaItems;
 use pocketmine\math\Axis;
@@ -40,7 +39,7 @@ final class FloorCoralFan extends BaseCoral{
 
 	public function getRequiredStateDataBits() : int{ return parent::getRequiredStateDataBits() + 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalAxis($this->axis);
 	}
 

src/block/Froglight.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\FroglightType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 final class Froglight extends SimplePillar{
 
@@ -38,7 +37,7 @@ final class Froglight extends SimplePillar{
 
 	public function getRequiredTypeDataBits() : int{ return 2; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->froglightType($this->froglightType);
 	}
 

src/block/FrostedIce.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\BlockMeltEvent;
 use function mt_rand;
 
@@ -35,7 +34,7 @@ class FrostedIce extends Ice{
 
 	public function getRequiredStateDataBits() : int{ return 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(2, 0, self::MAX_AGE, $this->age);
 	}
 

src/block/Furnace.php

@@ -27,8 +27,7 @@ use pocketmine\block\tile\Furnace as TileFurnace;
 use pocketmine\block\utils\FacesOppositePlacingPlayerTrait;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\crafting\FurnaceType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Vector3;
 use pocketmine\player\Player;
@@ -49,7 +48,7 @@ class Furnace extends Opaque{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->lit);
 	}

src/block/Hopper.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\tile\Hopper as TileHopper;
 use pocketmine\block\utils\PoweredByRedstoneTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -42,7 +41,7 @@ class Hopper extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->facingExcept($this->facing, Facing::UP);
 		$w->bool($this->powered);
 	}

src/block/ItemFrame.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\tile\ItemFrame as TileItemFrame;
 use pocketmine\block\utils\AnyFacingTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Facing;
 use pocketmine\math\Vector3;
@@ -53,7 +52,7 @@ class ItemFrame extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->facing($this->facing);
 		$w->bool($this->hasMap);
 	}

src/block/Lantern.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\AxisAlignedBB;
@@ -46,7 +45,7 @@ class Lantern extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->hanging);
 	}
 

src/block/Leaves.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\LeavesType;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\LeavesDecayEvent;
 use pocketmine\item\Item;
 use pocketmine\item\VanillaItems;
@@ -50,7 +49,7 @@ class Leaves extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->noDecay);
 		$w->bool($this->checkDecay);
 	}

src/block/Lectern.php

@@ -27,8 +27,7 @@ use pocketmine\block\tile\Lectern as TileLectern;
 use pocketmine\block\utils\FacesOppositePlacingPlayerTrait;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\item\WritableBookBase;
 use pocketmine\math\AxisAlignedBB;
@@ -49,7 +48,7 @@ class Lectern extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->producingSignal);
 	}

src/block/Lever.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\LeverFacing;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;
@@ -47,7 +46,7 @@ class Lever extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->leverFacing($this->facing);
 		$w->bool($this->activated);
 	}

src/block/Light.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Vector3;
 use pocketmine\player\Player;
@@ -37,7 +36,7 @@ final class Light extends Flowable{
 
 	public function getRequiredTypeDataBits() : int{ return 4; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(4, self::MIN_LIGHT_LEVEL, self::MAX_LIGHT_LEVEL, $this->level);
 	}
 

src/block/Liquid.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\MinimumCostFlowCalculator;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\event\block\BlockFormEvent;
 use pocketmine\event\block\BlockSpreadEvent;
@@ -51,7 +50,7 @@ abstract class Liquid extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 5; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, 0, self::MAX_DECAY, $this->decay);
 		$w->bool($this->falling);
 		$w->bool($this->still);

src/block/NetherPortal.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
@@ -37,7 +36,7 @@ class NetherPortal extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalAxis($this->axis);
 	}
 

src/block/NetherVines.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\event\block\StructureGrowEvent;
 use pocketmine\item\Fertilizer;
@@ -57,7 +56,7 @@ class NetherVines extends Flowable{
 		return 5;
 	}
 
-	public function describeState(RuntimeDataWriter|RuntimeDataReader $w) : void{
+	public function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(5, 0, self::MAX_AGE, $this->age);
 	}
 

src/block/NetherWartPlant.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\BlockGrowEvent;
 use pocketmine\item\Item;
 use pocketmine\math\Facing;
@@ -40,7 +39,7 @@ class NetherWartPlant extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(2, 0, self::MAX_AGE, $this->age);
 	}
 

src/block/Rail.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\RailConnectionInfo;
 use pocketmine\data\bedrock\block\BlockLegacyMetadata;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\math\Facing;
 use function array_keys;
 use function implode;
@@ -37,7 +36,7 @@ class Rail extends BaseRail{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->railShape($this->railShape);
 	}
 

src/block/RedMushroomBlock.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\MushroomBlockType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use function mt_rand;
 
@@ -39,7 +38,7 @@ class RedMushroomBlock extends Opaque{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->mushroomBlockType($this->mushroomBlockType);
 	}
 

src/block/RedstoneComparator.php

@@ -28,8 +28,7 @@ use pocketmine\block\utils\AnalogRedstoneSignalEmitterTrait;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\PoweredByRedstoneTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -47,7 +46,7 @@ class RedstoneComparator extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->isSubtractMode);
 		$w->bool($this->powered);

src/block/RedstoneLamp.php

@@ -24,15 +24,14 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\PoweredByRedstoneTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 class RedstoneLamp extends Opaque{
 	use PoweredByRedstoneTrait;
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->powered);
 	}
 

src/block/RedstoneOre.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\item\VanillaItems;
 use pocketmine\math\Vector3;
@@ -36,7 +35,7 @@ class RedstoneOre extends Opaque{
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->lit);
 	}
 

src/block/RedstoneRepeater.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\PoweredByRedstoneTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -46,7 +45,7 @@ class RedstoneRepeater extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 5; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->boundedInt(2, self::MIN_DELAY, self::MAX_DELAY, $this->delay);
 		$w->bool($this->powered);

src/block/RedstoneTorch.php

@@ -23,15 +23,14 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 class RedstoneTorch extends Torch{
 	protected bool $lit = true;
 
 	public function getRequiredStateDataBits() : int{ return parent::getRequiredStateDataBits() + 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		parent::describeState($w);
 		$w->bool($this->lit);
 	}

src/block/Sapling.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\TreeType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\StructureGrowEvent;
 use pocketmine\item\Fertilizer;
 use pocketmine\item\Item;
@@ -49,7 +48,7 @@ class Sapling extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->ready);
 	}
 

src/block/SeaPickle.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Vector3;
@@ -41,7 +40,7 @@ class SeaPickle extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(2, self::MIN_COUNT, self::MAX_COUNT, $this->count);
 		$w->bool($this->underwater);
 	}

src/block/ShulkerBox.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\tile\ShulkerBox as TileShulkerBox;
 use pocketmine\block\utils\AnyFacingTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Vector3;
 use pocketmine\player\Player;
@@ -37,7 +36,7 @@ class ShulkerBox extends Opaque{
 
 	public function getRequiredStateDataBits() : int{ return 0; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		//NOOP - we don't read or write facing here, because the tile persists it
 	}
 

src/block/SimplePressurePlate.php

@@ -23,15 +23,14 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 abstract class SimplePressurePlate extends PressurePlate{
 	protected bool $pressed = false;
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->pressed);
 	}
 

src/block/Skull.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\tile\Skull as TileSkull;
 use pocketmine\block\utils\SkullType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -52,13 +51,13 @@ class Skull extends Flowable{
 
 	public function getRequiredTypeDataBits() : int{ return 3; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->skullType($this->skullType);
 	}
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->facingExcept($this->facing, Facing::DOWN);
 	}
 

src/block/Slab.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\SlabType;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -44,7 +43,7 @@ class Slab extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->slabType($this->slabType);
 	}
 

src/block/SnowLayer.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\utils\Fallable;
 use pocketmine\block\utils\FallableTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\BlockMeltEvent;
 use pocketmine\item\Item;
 use pocketmine\item\VanillaItems;
@@ -49,7 +48,7 @@ class SnowLayer extends Flowable implements Fallable{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, self::MIN_LAYERS, self::MAX_LAYERS, $this->layers);
 	}
 

src/block/Sponge.php

@@ -23,15 +23,14 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 class Sponge extends Opaque{
 	protected bool $wet = false;
 
 	public function getRequiredTypeDataBits() : int{ return 1; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->bool($this->wet);
 	}
 

src/block/Stair.php

@@ -26,8 +26,7 @@ namespace pocketmine\block;
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\StairShape;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\AxisAlignedBB;
@@ -49,7 +48,7 @@ class Stair extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->upsideDown);
 	}

src/block/StraightOnlyRail.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\RailConnectionInfo;
 use pocketmine\data\bedrock\block\BlockLegacyMetadata;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use function array_keys;
 use function implode;
 
@@ -39,7 +38,7 @@ class StraightOnlyRail extends BaseRail{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->straightOnlyRailShape($this->railShape);
 	}
 

src/block/Sugarcane.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\event\block\BlockGrowEvent;
 use pocketmine\item\Fertilizer;
 use pocketmine\item\Item;
@@ -41,7 +40,7 @@ class Sugarcane extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(4, 0, self::MAX_AGE, $this->age);
 	}
 

src/block/SweetBerryBush.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\entity\Living;
 use pocketmine\event\block\BlockGrowEvent;
@@ -48,7 +47,7 @@ class SweetBerryBush extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(3, self::STAGE_SAPLING, self::STAGE_MATURE, $this->age);
 	}
 

src/block/TNT.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Location;
 use pocketmine\entity\object\PrimedTNT;
 use pocketmine\entity\projectile\Projectile;
@@ -48,13 +47,13 @@ class TNT extends Opaque{
 
 	public function getRequiredTypeDataBits() : int{ return 1; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->bool($this->worksUnderwater);
 	}
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->unstable);
 	}
 

src/block/Torch.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;
@@ -39,7 +38,7 @@ class Torch extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->facingExcept($this->facing, Facing::DOWN);
 	}
 

src/block/Trapdoor.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\HorizontalFacingTrait;
 use pocketmine\block\utils\SupportType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -43,7 +42,7 @@ class Trapdoor extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->top);
 		$w->bool($this->open);

src/block/Tripwire.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\item\VanillaItems;
 
@@ -36,7 +35,7 @@ class Tripwire extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->triggered);
 		$w->bool($this->suspended);
 		$w->bool($this->connected);

src/block/TripwireHook.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\HorizontalFacingTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;
@@ -41,7 +40,7 @@ class TripwireHook extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 		$w->bool($this->connected);
 		$w->bool($this->powered);

src/block/UnknownBlock.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 
 /**
@@ -41,7 +40,7 @@ class UnknownBlock extends Transparent{
 
 	public function getRequiredTypeDataBits() : int{ return Block::INTERNAL_STATE_DATA_BITS; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		//use type instead of state, so we don't lose any information like colour
 		//this might be an improperly registered plugin block
 		$w->int(Block::INTERNAL_STATE_DATA_BITS, $this->stateData);

src/block/Vine.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Entity;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
@@ -42,7 +41,7 @@ class Vine extends Flowable{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacingFlags($this->faces);
 	}
 

src/block/Wall.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\SupportType;
 use pocketmine\block\utils\WallConnectionType;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\math\Axis;
 use pocketmine\math\AxisAlignedBB;
 use pocketmine\math\Facing;
@@ -45,7 +44,7 @@ class Wall extends Transparent{
 
 	public function getRequiredStateDataBits() : int{ return 9; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->wallConnections($this->connections);
 		$w->bool($this->post);
 	}

src/block/WallCoralFan.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block;
 
 use pocketmine\block\utils\HorizontalFacingTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\item\VanillaItems;
 use pocketmine\math\Axis;
@@ -39,7 +38,7 @@ final class WallCoralFan extends BaseCoral{
 
 	public function getRequiredStateDataBits() : int{ return parent::getRequiredStateDataBits() + 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 	}
 

src/block/Wood.php

@@ -25,8 +25,7 @@ namespace pocketmine\block;
 
 use pocketmine\block\utils\PillarRotationTrait;
 use pocketmine\block\utils\WoodTypeTrait;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Axe;
 use pocketmine\item\Item;
 use pocketmine\math\Vector3;
@@ -41,7 +40,7 @@ class Wood extends Opaque{
 
 	public function getRequiredTypeDataBits() : int{ return 1; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->bool($this->stripped);
 	}
 

src/block/utils/AnalogRedstoneSignalEmitterTrait.php

@@ -23,15 +23,14 @@ declare(strict_types=1);
 
 namespace pocketmine\block\utils;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 trait AnalogRedstoneSignalEmitterTrait{
 	protected int $signalStrength = 0;
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(4, 0, 15, $this->signalStrength);
 	}
 

src/block/utils/AnyFacingTrait.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block\utils;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\math\Facing;
 
 trait AnyFacingTrait{
@@ -32,7 +31,7 @@ trait AnyFacingTrait{
 
 	public function getRequiredStateDataBits() : int{ return 3; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->facing($this->facing);
 	}
 

src/block/utils/CandleTrait.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block\utils;
 
 use pocketmine\block\Block;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\projectile\Projectile;
 use pocketmine\item\Durable;
 use pocketmine\item\enchantment\VanillaEnchantments;
@@ -42,7 +41,7 @@ trait CandleTrait{
 
 	public function getRequiredStateDataBits() : int{ return 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->bool($this->lit);
 	}
 

src/block/utils/ColoredTrait.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block\utils;
 
 use pocketmine\block\Block;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 trait ColoredTrait{
 	/** @var DyeColor */
@@ -34,7 +33,7 @@ trait ColoredTrait{
 	public function getRequiredTypeDataBits() : int{ return 4; }
 
 	/** @see Block::describeType() */
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->dyeColor($this->color);
 	}
 

src/block/utils/CopperTrait.php

@@ -25,8 +25,7 @@ namespace pocketmine\block\utils;
 
 use pocketmine\block\BlockIdentifier;
 use pocketmine\block\BlockTypeInfo;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Axe;
 use pocketmine\item\Item;
 use pocketmine\item\ItemTypeIds;
@@ -47,7 +46,7 @@ trait CopperTrait{
 
 	public function getRequiredTypeDataBits() : int{ return 3; }
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->copperOxidation($this->oxidation);
 		$w->bool($this->waxed);
 	}

src/block/utils/CoralTypeTrait.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block\utils;
 
 use pocketmine\block\Block;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 trait CoralTypeTrait{
 	protected CoralType $coralType;
@@ -34,7 +33,7 @@ trait CoralTypeTrait{
 	public function getRequiredTypeDataBits() : int{ return 4; }
 
 	/** @see Block::describeType() */
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->coralType($this->coralType);
 		$w->bool($this->dead);
 	}

src/block/utils/HorizontalFacingTrait.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block\utils;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;
 
@@ -33,7 +32,7 @@ trait HorizontalFacingTrait{
 
 	public function getRequiredStateDataBits() : int{ return 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->horizontalFacing($this->facing);
 	}
 

src/block/utils/PillarRotationTrait.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\block\utils;
 
 use pocketmine\block\Block;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\item\Item;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;
@@ -38,7 +37,7 @@ trait PillarRotationTrait{
 
 	public function getRequiredStateDataBits() : int{ return 2; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->axis($this->axis);
 	}
 

src/block/utils/RailPoweredByRedstoneTrait.php

@@ -23,15 +23,14 @@ declare(strict_types=1);
 
 namespace pocketmine\block\utils;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 trait RailPoweredByRedstoneTrait{
 	use PoweredByRedstoneTrait;
 
 	public function getRequiredStateDataBits() : int{ return parent::getRequiredStateDataBits() + 1; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		parent::describeState($w);
 		$w->bool($this->powered);
 	}

src/block/utils/SignLikeRotationTrait.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\block\utils;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use function floor;
 
 trait SignLikeRotationTrait{
@@ -33,7 +32,7 @@ trait SignLikeRotationTrait{
 
 	public function getRequiredStateDataBits() : int{ return 4; }
 
-	protected function describeState(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeState(RuntimeDataDescriber $w) : void{
 		$w->boundedInt(4, 0, 15, $this->rotation);
 	}
 

src/data/runtime/RuntimeDataDescriber.php

@@ -0,0 +1,67 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+ */
+
+declare(strict_types=1);
+
+namespace pocketmine\data\runtime;
+
+use pocketmine\block\utils\BrewingStandSlot;
+use pocketmine\block\utils\WallConnectionType;
+use pocketmine\math\Facing;
+
+interface RuntimeDataDescriber extends RuntimeEnumDescriber{
+	public function int(int $bits, int &$value) : void;
+
+	public function boundedInt(int $bits, int $min, int $max, int &$value) : void;
+
+	public function bool(bool &$value) : void;
+
+	public function horizontalFacing(int &$facing) : void;
+
+	/**
+	 * @param int[] $faces
+	 */
+	public function horizontalFacingFlags(array &$faces) : void;
+
+	public function facing(int &$facing) : void;
+
+	public function facingExcept(int &$facing, int $except) : void;
+
+	public function axis(int &$axis) : void;
+
+	public function horizontalAxis(int &$axis) : void;
+
+	/**
+	 * @param WallConnectionType[] $connections
+	 * @phpstan-param array<Facing::NORTH|Facing::EAST|Facing::SOUTH|Facing::WEST, WallConnectionType> $connections
+	 */
+	public function wallConnections(array &$connections) : void;
+
+	/**
+	 * @param BrewingStandSlot[] $slots
+	 * @phpstan-param array<int, BrewingStandSlot> $slots
+	 */
+	public function brewingStandSlots(array &$slots) : void;
+
+	public function railShape(int &$railShape) : void;
+
+	public function straightOnlyRailShape(int &$railShape) : void;
+}

src/data/runtime/RuntimeDataReader.php

@@ -30,7 +30,7 @@ use pocketmine\math\Axis;
 use pocketmine\math\Facing;
 use pocketmine\utils\AssumptionFailedError;
 
-final class RuntimeDataReader{
+final class RuntimeDataReader implements RuntimeDataDescriber{
 	use RuntimeEnumDeserializerTrait;
 
 	private int $offset = 0;
@@ -55,12 +55,16 @@ final class RuntimeDataReader{
 		$value = $this->readInt($bits);
 	}
 
-	public function boundedInt(int $bits, int $min, int $max, int &$value) : void{
+	protected function readBoundedInt(int $bits, int $min, int $max) : int{
 		$result = $this->readInt($bits) + $min;
 		if($result < $min || $result > $max){
 			throw new InvalidSerializedRuntimeDataException("Value is outside the range $min - $max");
 		}
-		$value = $result;
+		return $result;
+	}
+
+	public function boundedInt(int $bits, int $min, int $max, int &$value) : void{
+		$value = $this->readBoundedInt($bits, $min, $max);
 	}
 
 	protected function readBool() : bool{
@@ -142,8 +146,7 @@ final class RuntimeDataReader{
 		$result = [];
 		//TODO: we can pack this into 7 bits instead of 8
 		foreach(Facing::HORIZONTAL as $facing){
-			$type = 0;
+			$type = $this->readBoundedInt(2, 0, 2);
-			$this->boundedInt(2, 0, 2, $type);
 			if($type !== 0){
 				$result[$facing] = match($type){
 					1 => WallConnectionType::SHORT(),

src/data/runtime/RuntimeDataWriter.php

@@ -30,7 +30,7 @@ use pocketmine\math\Facing;
 use pocketmine\utils\AssumptionFailedError;
 use function array_flip;
 
-final class RuntimeDataWriter{
+final class RuntimeDataWriter implements RuntimeDataDescriber{
 	use RuntimeEnumSerializerTrait;
 
 	private int $value = 0;
@@ -40,7 +40,7 @@ final class RuntimeDataWriter{
 		private int $maxBits
 	){}
 
-	public function int(int $bits, int $value) : void{
+	public function writeInt(int $bits, int $value) : void{
 		if($this->offset + $bits > $this->maxBits){
 			throw new \InvalidArgumentException("Bit buffer cannot be larger than $this->maxBits bits (already have $this->offset bits)");
 		}
@@ -52,19 +52,31 @@ final class RuntimeDataWriter{
 		$this->offset += $bits;
 	}
 
-	public function boundedInt(int $bits, int $min, int $max, int $value) : void{
+	public function int(int $bits, int &$value) : void{
+		$this->writeInt($bits, $value);
+	}
+
+	protected function writeBoundedInt(int $bits, int $min, int $max, int $value) : void{
 		if($value < $min || $value > $max){
 			throw new \InvalidArgumentException("Value $value is outside the range $min - $max");
 		}
-		$this->int($bits, $value - $min);
+		$this->writeInt($bits, $value - $min);
 	}
 
-	public function bool(bool $value) : void{
+	public function boundedInt(int $bits, int $min, int $max, int &$value) : void{
-		$this->int(1, $value ? 1 : 0);
+		$this->writeBoundedInt($bits, $min, $max, $value);
 	}
 
-	public function horizontalFacing(int $facing) : void{
+	protected function writeBool(bool $value) : void{
-		$this->int(2, match($facing){
+		$this->writeInt(1, $value ? 1 : 0);
+	}
+
+	public function bool(bool &$value) : void{
+		$this->writeBool($value);
+	}
+
+	public function horizontalFacing(int &$facing) : void{
+		$this->writeInt(2, match($facing){
 			Facing::NORTH => 0,
 			Facing::EAST => 1,
 			Facing::SOUTH => 2,
@@ -76,15 +88,15 @@ final class RuntimeDataWriter{
 	/**
 	 * @param int[] $faces
 	 */
-	public function horizontalFacingFlags(array $faces) : void{
+	public function horizontalFacingFlags(array &$faces) : void{
 		$uniqueFaces = array_flip($faces);
 		foreach(Facing::HORIZONTAL as $facing){
-			$this->bool(isset($uniqueFaces[$facing]));
+			$this->writeBool(isset($uniqueFaces[$facing]));
 		}
 	}
 
-	public function facing(int $facing) : void{
+	public function facing(int &$facing) : void{
-		$this->int(3, match($facing){
+		$this->writeInt(3, match($facing){
 			0 => Facing::DOWN,
 			1 => Facing::UP,
 			2 => Facing::NORTH,
@@ -95,12 +107,12 @@ final class RuntimeDataWriter{
 		});
 	}
 
-	public function facingExcept(int $facing, int $except) : void{
+	public function facingExcept(int &$facing, int $except) : void{
 		$this->facing($facing);
 	}
 
-	public function axis(int $axis) : void{
+	public function axis(int &$axis) : void{
-		$this->int(2, match($axis){
+		$this->writeInt(2, match($axis){
 			Axis::X => 0,
 			Axis::Z => 1,
 			Axis::Y => 2,
@@ -108,8 +120,8 @@ final class RuntimeDataWriter{
 		});
 	}
 
-	public function horizontalAxis(int $axis) : void{
+	public function horizontalAxis(int &$axis) : void{
-		$this->int(1, match($axis){
+		$this->writeInt(1, match($axis){
 			Axis::X => 0,
 			Axis::Z => 1,
 			default => throw new \InvalidArgumentException("Invalid horizontal axis $axis")
@@ -120,10 +132,10 @@ final class RuntimeDataWriter{
 	 * @param WallConnectionType[] $connections
 	 * @phpstan-param array<Facing::NORTH|Facing::EAST|Facing::SOUTH|Facing::WEST, WallConnectionType> $connections
 	 */
-	public function wallConnections(array $connections) : void{
+	public function wallConnections(array &$connections) : void{
 		//TODO: we can pack this into 7 bits instead of 8
 		foreach(Facing::HORIZONTAL as $facing){
-			$this->boundedInt(2, 0, 2, match($connections[$facing] ?? null){
+			$this->writeBoundedInt(2, 0, 2, match($connections[$facing] ?? null){
 				null => 0,
 				WallConnectionType::SHORT() => 1,
 				WallConnectionType::TALL() => 2,
@@ -136,21 +148,21 @@ final class RuntimeDataWriter{
 	 * @param BrewingStandSlot[] $slots
 	 * @phpstan-param array<int, BrewingStandSlot> $slots
 	 */
-	public function brewingStandSlots(array $slots) : void{
+	public function brewingStandSlots(array &$slots) : void{
 		foreach([
 			BrewingStandSlot::EAST(),
 			BrewingStandSlot::NORTHWEST(),
 			BrewingStandSlot::SOUTHWEST(),
 		] as $member){
-			$this->bool(isset($slots[$member->id()]));
+			$this->writeBool(isset($slots[$member->id()]));
 		}
 	}
 
-	public function railShape(int $railShape) : void{
+	public function railShape(int &$railShape) : void{
 		$this->int(4, $railShape);
 	}
 
-	public function straightOnlyRailShape(int $railShape) : void{
+	public function straightOnlyRailShape(int &$railShape) : void{
 		$this->int(3, $railShape);
 	}
 

src/data/runtime/RuntimeEnumDescriber.php

@@ -0,0 +1,58 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+ */
+
+declare(strict_types=1);
+
+namespace pocketmine\data\runtime;
+
+/**
+ * This class is auto-generated. Do not edit it manually.
+ * @see build/generate-runtime-enum-serializers.php
+ */
+interface RuntimeEnumDescriber{
+
+	public function bellAttachmentType(\pocketmine\block\utils\BellAttachmentType &$value) : void;
+
+	public function copperOxidation(\pocketmine\block\utils\CopperOxidation &$value) : void;
+
+	public function coralType(\pocketmine\block\utils\CoralType &$value) : void;
+
+	public function dirtType(\pocketmine\block\utils\DirtType &$value) : void;
+
+	public function dyeColor(\pocketmine\block\utils\DyeColor &$value) : void;
+
+	public function froglightType(\pocketmine\block\utils\FroglightType &$value) : void;
+
+	public function leverFacing(\pocketmine\block\utils\LeverFacing &$value) : void;
+
+	public function medicineType(\pocketmine\item\MedicineType &$value) : void;
+
+	public function mushroomBlockType(\pocketmine\block\utils\MushroomBlockType &$value) : void;
+
+	public function potionType(\pocketmine\item\PotionType &$value) : void;
+
+	public function skullType(\pocketmine\block\utils\SkullType &$value) : void;
+
+	public function slabType(\pocketmine\block\utils\SlabType &$value) : void;
+
+	public function suspiciousStewType(\pocketmine\item\SuspiciousStewType &$value) : void;
+
+}

src/data/runtime/RuntimeEnumSerializerTrait.php

@@ -29,10 +29,10 @@ namespace pocketmine\data\runtime;
  */
 trait RuntimeEnumSerializerTrait{
 
-	abstract public function int(int $bits, int $value) : void;
+	abstract protected function writeInt(int $bits, int $value) : void;
 
-	public function bellAttachmentType(\pocketmine\block\utils\BellAttachmentType $value) : void{
+	public function bellAttachmentType(\pocketmine\block\utils\BellAttachmentType &$value) : void{
-		$this->int(2, match($value){
+		$this->writeInt(2, match($value){
 			\pocketmine\block\utils\BellAttachmentType::CEILING() => 0,
 			\pocketmine\block\utils\BellAttachmentType::FLOOR() => 1,
 			\pocketmine\block\utils\BellAttachmentType::ONE_WALL() => 2,
@@ -41,8 +41,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function copperOxidation(\pocketmine\block\utils\CopperOxidation $value) : void{
+	public function copperOxidation(\pocketmine\block\utils\CopperOxidation &$value) : void{
-		$this->int(2, match($value){
+		$this->writeInt(2, match($value){
 			\pocketmine\block\utils\CopperOxidation::EXPOSED() => 0,
 			\pocketmine\block\utils\CopperOxidation::NONE() => 1,
 			\pocketmine\block\utils\CopperOxidation::OXIDIZED() => 2,
@@ -51,8 +51,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function coralType(\pocketmine\block\utils\CoralType $value) : void{
+	public function coralType(\pocketmine\block\utils\CoralType &$value) : void{
-		$this->int(3, match($value){
+		$this->writeInt(3, match($value){
 			\pocketmine\block\utils\CoralType::BRAIN() => 0,
 			\pocketmine\block\utils\CoralType::BUBBLE() => 1,
 			\pocketmine\block\utils\CoralType::FIRE() => 2,
@@ -62,8 +62,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function dirtType(\pocketmine\block\utils\DirtType $value) : void{
+	public function dirtType(\pocketmine\block\utils\DirtType &$value) : void{
-		$this->int(2, match($value){
+		$this->writeInt(2, match($value){
 			\pocketmine\block\utils\DirtType::COARSE() => 0,
 			\pocketmine\block\utils\DirtType::NORMAL() => 1,
 			\pocketmine\block\utils\DirtType::ROOTED() => 2,
@@ -71,8 +71,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function dyeColor(\pocketmine\block\utils\DyeColor $value) : void{
+	public function dyeColor(\pocketmine\block\utils\DyeColor &$value) : void{
-		$this->int(4, match($value){
+		$this->writeInt(4, match($value){
 			\pocketmine\block\utils\DyeColor::BLACK() => 0,
 			\pocketmine\block\utils\DyeColor::BLUE() => 1,
 			\pocketmine\block\utils\DyeColor::BROWN() => 2,
@@ -93,8 +93,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function froglightType(\pocketmine\block\utils\FroglightType $value) : void{
+	public function froglightType(\pocketmine\block\utils\FroglightType &$value) : void{
-		$this->int(2, match($value){
+		$this->writeInt(2, match($value){
 			\pocketmine\block\utils\FroglightType::OCHRE() => 0,
 			\pocketmine\block\utils\FroglightType::PEARLESCENT() => 1,
 			\pocketmine\block\utils\FroglightType::VERDANT() => 2,
@@ -102,8 +102,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function leverFacing(\pocketmine\block\utils\LeverFacing $value) : void{
+	public function leverFacing(\pocketmine\block\utils\LeverFacing &$value) : void{
-		$this->int(3, match($value){
+		$this->writeInt(3, match($value){
 			\pocketmine\block\utils\LeverFacing::DOWN_AXIS_X() => 0,
 			\pocketmine\block\utils\LeverFacing::DOWN_AXIS_Z() => 1,
 			\pocketmine\block\utils\LeverFacing::EAST() => 2,
@@ -116,8 +116,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function medicineType(\pocketmine\item\MedicineType $value) : void{
+	public function medicineType(\pocketmine\item\MedicineType &$value) : void{
-		$this->int(2, match($value){
+		$this->writeInt(2, match($value){
 			\pocketmine\item\MedicineType::ANTIDOTE() => 0,
 			\pocketmine\item\MedicineType::ELIXIR() => 1,
 			\pocketmine\item\MedicineType::EYE_DROPS() => 2,
@@ -126,8 +126,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function mushroomBlockType(\pocketmine\block\utils\MushroomBlockType $value) : void{
+	public function mushroomBlockType(\pocketmine\block\utils\MushroomBlockType &$value) : void{
-		$this->int(4, match($value){
+		$this->writeInt(4, match($value){
 			\pocketmine\block\utils\MushroomBlockType::ALL_CAP() => 0,
 			\pocketmine\block\utils\MushroomBlockType::CAP_EAST() => 1,
 			\pocketmine\block\utils\MushroomBlockType::CAP_MIDDLE() => 2,
@@ -143,8 +143,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function potionType(\pocketmine\item\PotionType $value) : void{
+	public function potionType(\pocketmine\item\PotionType &$value) : void{
-		$this->int(6, match($value){
+		$this->writeInt(6, match($value){
 			\pocketmine\item\PotionType::AWKWARD() => 0,
 			\pocketmine\item\PotionType::FIRE_RESISTANCE() => 1,
 			\pocketmine\item\PotionType::HARMING() => 2,
@@ -191,8 +191,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function skullType(\pocketmine\block\utils\SkullType $value) : void{
+	public function skullType(\pocketmine\block\utils\SkullType &$value) : void{
-		$this->int(3, match($value){
+		$this->writeInt(3, match($value){
 			\pocketmine\block\utils\SkullType::CREEPER() => 0,
 			\pocketmine\block\utils\SkullType::DRAGON() => 1,
 			\pocketmine\block\utils\SkullType::PLAYER() => 2,
@@ -203,8 +203,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function slabType(\pocketmine\block\utils\SlabType $value) : void{
+	public function slabType(\pocketmine\block\utils\SlabType &$value) : void{
-		$this->int(2, match($value){
+		$this->writeInt(2, match($value){
 			\pocketmine\block\utils\SlabType::BOTTOM() => 0,
 			\pocketmine\block\utils\SlabType::DOUBLE() => 1,
 			\pocketmine\block\utils\SlabType::TOP() => 2,
@@ -212,8 +212,8 @@ trait RuntimeEnumSerializerTrait{
 		});
 	}
 
-	public function suspiciousStewType(\pocketmine\item\SuspiciousStewType $value) : void{
+	public function suspiciousStewType(\pocketmine\item\SuspiciousStewType &$value) : void{
-		$this->int(4, match($value){
+		$this->writeInt(4, match($value){
 			\pocketmine\item\SuspiciousStewType::ALLIUM() => 0,
 			\pocketmine\item\SuspiciousStewType::AZURE_BLUET() => 1,
 			\pocketmine\item\SuspiciousStewType::BLUE_ORCHID() => 2,

src/item/Banner.php

@@ -29,8 +29,7 @@ use pocketmine\block\utils\BannerPatternLayer;
 use pocketmine\block\utils\DyeColor;
 use pocketmine\data\bedrock\BannerPatternTypeIdMap;
 use pocketmine\data\bedrock\DyeColorIdMap;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\nbt\NBT;
 use pocketmine\nbt\tag\CompoundTag;
 use pocketmine\nbt\tag\ListTag;
@@ -64,7 +63,7 @@ class Banner extends ItemBlockWallOrFloor{
 		return $this;
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->dyeColor($this->color);
 	}
 

src/item/CoralFan.php

@@ -27,8 +27,7 @@ use pocketmine\block\Block;
 use pocketmine\block\utils\CoralType;
 use pocketmine\block\utils\CoralTypeTrait;
 use pocketmine\block\VanillaBlocks;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\math\Axis;
 use pocketmine\math\Facing;
 
@@ -42,7 +41,7 @@ final class CoralFan extends Item{
 		parent::__construct($identifier, VanillaBlocks::CORAL_FAN()->getName());
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		//this is aliased to ensure a compile error in case the functions in Item or Block start to differ in future
 		//right now we can directly reuse encodeType from CoralTypeTrait, but that might silently stop working if Item
 		//were to be altered. CoralTypeTrait was originally intended for blocks, so it's better not to assume anything.

src/item/Dye.php

@@ -24,8 +24,7 @@ declare(strict_types=1);
 namespace pocketmine\item;
 
 use pocketmine\block\utils\DyeColor;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 class Dye extends Item{
 	private DyeColor $color;
@@ -35,7 +34,7 @@ class Dye extends Item{
 		parent::__construct($identifier, $name);
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->dyeColor($this->color);
 	}
 

src/item/Item.php

@@ -32,7 +32,7 @@ use pocketmine\block\BlockToolType;
 use pocketmine\block\VanillaBlocks;
 use pocketmine\data\bedrock\EnchantmentIdMap;
 use pocketmine\data\bedrock\item\ItemTypeDeserializeException;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
 use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\data\SavedDataLoadingException;
 use pocketmine\entity\Entity;
@@ -470,7 +470,7 @@ class Item implements \JsonSerializable{
 		return $writer->getValue();
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		//NOOP
 	}
 

src/item/ItemBlock.php

@@ -26,8 +26,7 @@ namespace pocketmine\item;
 use pocketmine\block\Block;
 use pocketmine\block\RuntimeBlockStateRegistry;
 use pocketmine\block\VanillaBlocks;
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 /**
  * Class used for Items that directly represent blocks, such as stone, dirt, wood etc.
@@ -53,7 +52,7 @@ final class ItemBlock extends Item{
 		$this->maxStackSize = $block->getMaxStackSize();
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->int(Block::INTERNAL_STATE_DATA_BITS, $this->blockTypeData);
 	}
 

src/item/Medicine.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\item;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Living;
 use pocketmine\player\Player;
 
@@ -37,7 +36,7 @@ class Medicine extends Item implements ConsumableItem{
 		parent::__construct($identifier, $name);
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->medicineType($this->medicineType);
 	}
 

src/item/Potion.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\item;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Living;
 use pocketmine\player\Player;
 
@@ -37,7 +36,7 @@ class Potion extends Item implements ConsumableItem{
 		parent::__construct($identifier, $name);
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->potionType($this->potionType);
 	}
 

src/item/SplashPotion.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\item;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 use pocketmine\entity\Location;
 use pocketmine\entity\projectile\SplashPotion as SplashPotionEntity;
 use pocketmine\entity\projectile\Throwable;
@@ -39,7 +38,7 @@ class SplashPotion extends ProjectileItem{
 		parent::__construct($identifier, $name);
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->potionType($this->potionType);
 	}
 

src/item/SuspiciousStew.php

@@ -23,8 +23,7 @@ declare(strict_types=1);
 
 namespace pocketmine\item;
 
-use pocketmine\data\runtime\RuntimeDataReader;
+use pocketmine\data\runtime\RuntimeDataDescriber;
-use pocketmine\data\runtime\RuntimeDataWriter;
 
 class SuspiciousStew extends Food{
 
@@ -35,7 +34,7 @@ class SuspiciousStew extends Food{
 		parent::__construct($identifier, $name);
 	}
 
-	protected function describeType(RuntimeDataReader|RuntimeDataWriter $w) : void{
+	protected function describeType(RuntimeDataDescriber $w) : void{
 		$w->suspiciousStewType($this->suspiciousStewType);
 	}