Use -xsource:3

analyzer/src/main/scala/com/avsystem/commons/analyzer/AnalyzerPlugin.scala

@@ -75,7 +75,7 @@ final class AnalyzerPlugin(val global: Global) extends Plugin { plugin =>
 
     import global._
 
-    def newPhase(prev: Phase) = new StdPhase(prev) {
+    def newPhase(prev: Phase): StdPhase = new StdPhase(prev) {
       def apply(unit: CompilationUnit): Unit =
         rules.foreach(rule => if (rule.level != Level.Off) rule.analyze(unit.asInstanceOf[rule.global.CompilationUnit]))
     }

benchmark/jvm/src/main/scala/com/avsystem/commons/mongo/BsonCodecBenchmark.scala

@@ -1,9 +1,9 @@
 package com.avsystem.commons
 package mongo
 
-import java.nio.ByteBuffer
+import com.avsystem.commons.ser.{Nested, Toplevel}
 
-import com.avsystem.commons.rpc.akka.serialization.{Nested, Something}
+import java.nio.ByteBuffer
 import org.bson.codecs.{BsonDocumentCodec, DecoderContext, EncoderContext}
 import org.bson.io.BasicOutputBuffer
 import org.bson.{BsonArray, BsonBinaryReader, BsonBinaryWriter, BsonDocument, BsonInt32, BsonString}
@@ -18,11 +18,11 @@ class BsonCodecBenchmark {
 
   import BsonCodecBenchmark._
 
-  private val something = Something(42, Nested(List(4, 8, 15, 16, 23, 42, 0), 131), "lol")
+  private val something = Toplevel(42, Nested(List(4, 8, 15, 16, 23, 42, 0), 131), "lol")
   private val doc = somethingCodec.toDocument(something)
   private val bytes = binaryEncode(something)
 
-  def binaryEncode(something: Something): Array[Byte] = {
+  def binaryEncode(something: Toplevel): Array[Byte] = {
     val output = new BasicOutputBuffer()
     val writer = new BsonBinaryWriter(output)
     val doc = somethingCodec.toDocument(something)
@@ -36,7 +36,7 @@ class BsonCodecBenchmark {
   }
 
   @Benchmark
-  def binaryDecoding(): Something = {
+  def binaryDecoding(): Toplevel = {
     val reader = new BsonBinaryReader(ByteBuffer.wrap(bytes))
     val doc = bsonDocumentCodec.decode(reader, DecoderContext.builder().build())
     somethingCodec.fromDocument(new Doc(doc))
@@ -48,7 +48,7 @@ class BsonCodecBenchmark {
   }
 
   @Benchmark
-  def decoding(): Something = {
+  def decoding(): Toplevel = {
     somethingCodec.fromDocument(doc)
   }
 }
@@ -76,13 +76,13 @@ object BsonCodecBenchmark {
 
   val nestedKey: DocKey[Nested, BsonDocument] = nestedCodec.bsonCodec.key("nested")
 
-  val somethingCodec = new DocumentCodec[Something] {
-    override def toDocument(t: Something): Doc = Doc()
+  val somethingCodec = new DocumentCodec[Toplevel] {
+    override def toDocument(t: Toplevel): Doc = Doc()
       .put(intKey, t.int)
       .put(nestedKey, t.nested)
       .put(strKey, t.str)
 
-    override def fromDocument(doc: Doc): Something = Something(
+    override def fromDocument(doc: Doc): Toplevel = Toplevel(
       int = doc.require(intKey),
       nested = doc.require(nestedKey),
       str = doc.require(strKey)

benchmark/jvm/src/main/scala/com/avsystem/commons/mongo/BsonInputOutputBenchmark.scala

@@ -1,10 +1,10 @@
 package com.avsystem.commons
 package mongo
 
+import com.avsystem.commons.ser.{Nested, Toplevel}
+
 import java.io.StringWriter
 import java.nio.ByteBuffer
-
-import com.avsystem.commons.rpc.akka.serialization.{Nested, Something}
 import org.bson.io.BasicOutputBuffer
 import org.bson.json.{JsonReader, JsonWriter}
 import org.bson.{BsonBinaryReader, BsonBinaryWriter, BsonDocument, BsonDocumentReader, BsonDocumentWriter, BsonReader, BsonValue, BsonWriter}
@@ -16,29 +16,29 @@ import org.openjdk.jmh.annotations.{Benchmark, BenchmarkMode, Fork, Measurement,
 @BenchmarkMode(Array(Mode.Throughput))
 @State(Scope.Thread)
 class BsonInputOutputBenchmark {
-  private val something = Something(42, Nested(List(4, 8, 15, 16, 23, 42, 0), 131), "lol")
+  private val something = Toplevel(42, Nested(List(4, 8, 15, 16, 23, 42, 0), 131), "lol")
   private val bytes = binaryEncode(something)
   private val doc = documentEncode(something)
   private val json = jsonEncode(something)
 
-  def write(something: Something, bsonWriter: BsonWriter): Unit = {
+  def write(something: Toplevel, bsonWriter: BsonWriter): Unit = {
     val output = new BsonWriterOutput(bsonWriter)
-    Something.codec.write(output, something)
+    Toplevel.codec.write(output, something)
   }
 
-  def binaryEncode(something: Something): Array[Byte] = {
+  def binaryEncode(something: Toplevel): Array[Byte] = {
     val bsonOutput = new BasicOutputBuffer()
     write(something, new BsonBinaryWriter(bsonOutput))
     bsonOutput.toByteArray
   }
 
-  def documentEncode(something: Something): BsonDocument = {
+  def documentEncode(something: Toplevel): BsonDocument = {
     val doc = new BsonDocument()
     write(something, new BsonDocumentWriter(doc))
     doc
   }
 
-  def jsonEncode(something: Something): String = {
+  def jsonEncode(something: Toplevel): String = {
     val stringWriter = new StringWriter()
     write(something, new JsonWriter(stringWriter))
     stringWriter.toString
@@ -64,23 +64,23 @@ class BsonInputOutputBenchmark {
     BsonValueOutput.write(something)
   }
 
-  def read(bsonReader: BsonReader): Something = {
+  def read(bsonReader: BsonReader): Toplevel = {
     val input = new BsonReaderInput(bsonReader)
-    Something.codec.read(input)
+    Toplevel.codec.read(input)
   }
 
   @Benchmark
-  def binaryDecoding(): Something = {
+  def binaryDecoding(): Toplevel = {
     read(new BsonBinaryReader(ByteBuffer.wrap(bytes)))
   }
 
   @Benchmark
-  def documentDecoding(): Something = {
+  def documentDecoding(): Toplevel = {
     read(new BsonDocumentReader(doc))
   }
 
   @Benchmark
-  def jsonDecoding(): Something = {
+  def jsonDecoding(): Toplevel = {
     read(new JsonReader(json))
   }
 }

core/src/main/scala/com/avsystem/commons/serialization/SimpleValueInputOutput.scala

@@ -51,28 +51,28 @@ class SimpleValueOutput(
   def this(consumer: Any => Unit) =
     this(consumer, new MHashMap[String, Any], new ListBuffer[Any])
 
-  def writeNull(): Unit = consumer(null)
-  def writeBoolean(boolean: Boolean): Unit = consumer(boolean)
-  def writeString(str: String): Unit = consumer(str)
-  def writeInt(int: Int): Unit = consumer(int)
-  def writeLong(long: Long): Unit = consumer(long)
-  def writeDouble(double: Double): Unit = consumer(double)
-  def writeBigInt(bigInt: BigInt): Unit = consumer(bigInt)
-  def writeBigDecimal(bigDecimal: BigDecimal): Unit = consumer(bigDecimal)
-  def writeBinary(binary: Array[Byte]): Unit = consumer(binary)
+  override def writeNull(): Unit = consumer(null)
+  override def writeBoolean(boolean: Boolean): Unit = consumer(boolean)
+  override def writeString(str: String): Unit = consumer(str)
+  override def writeInt(int: Int): Unit = consumer(int)
+  override def writeLong(long: Long): Unit = consumer(long)
+  override def writeDouble(double: Double): Unit = consumer(double)
+  override def writeBigInt(bigInt: BigInt): Unit = consumer(bigInt)
+  override def writeBigDecimal(bigDecimal: BigDecimal): Unit = consumer(bigDecimal)
+  override def writeBinary(binary: Array[Byte]): Unit = consumer(binary)
 
   def writeList(): ListOutput = new ListOutput {
     private val buffer = newListRepr
     override def declareSize(size: Int): Unit = buffer.sizeHint(size)
-    def writeElement() = new SimpleValueOutput(buffer += _, newObjectRepr, newListRepr)
-    def finish(): Unit = consumer(buffer.result())
+    override def writeElement(): SimpleValueOutput = new SimpleValueOutput(buffer += _, newObjectRepr, newListRepr)
+    override def finish(): Unit = consumer(buffer.result())
   }
 
   def writeObject(): ObjectOutput = new ObjectOutput {
     private val result = newObjectRepr
     override def declareSize(size: Int): Unit = result.sizeHint(size)
-    def writeField(key: String) = new SimpleValueOutput(v => result += ((key, v)), newObjectRepr, newListRepr)
-    def finish(): Unit = consumer(result)
+    override def writeField(key: String): SimpleValueOutput = new SimpleValueOutput(v => result += ((key, v)), newObjectRepr, newListRepr)
+    override def finish(): Unit = consumer(result)
   }
 }
 
@@ -95,15 +95,15 @@ class SimpleValueInput(value: Any) extends InputAndSimpleInput {
     case _ => throw new ReadFailure(s"Expected ${classTag[B].runtimeClass} but got ${value.getClass}")
   }
 
-  def readNull(): Boolean = value == null
-  def readBoolean(): Boolean = doReadUnboxed[Boolean, JBoolean]
-  def readString(): String = doRead[String]
-  def readInt(): Int = doReadUnboxed[Int, JInteger]
-  def readLong(): Long = doReadUnboxed[Long, JLong]
-  def readDouble(): Double = doReadUnboxed[Double, JDouble]
-  def readBigInt(): BigInt = doRead[JBigInteger]
-  def readBigDecimal(): BigDecimal = doRead[JBigDecimal]
-  def readBinary(): Array[Byte] = doRead[Array[Byte]]
+  override def readNull(): Boolean = value == null
+  override def readBoolean(): Boolean = doReadUnboxed[Boolean, JBoolean]
+  override def readString(): String = doRead[String]
+  override def readInt(): Int = doReadUnboxed[Int, JInteger]
+  override def readLong(): Long = doReadUnboxed[Long, JLong]
+  override def readDouble(): Double = doReadUnboxed[Double, JDouble]
+  override def readBigInt(): BigInt = doRead[JBigInteger]
+  override def readBigDecimal(): BigDecimal = doRead[JBigDecimal]
+  override def readBinary(): Array[Byte] = doRead[Array[Byte]]
 
   def readObject(): ObjectInput =
     new ObjectInput {
@@ -112,22 +112,22 @@ class SimpleValueInput(value: Any) extends InputAndSimpleInput {
         case (k, v) => new SimpleValueFieldInput(k, v)
       }
       override def knownSize: Int = if(map.isEmpty) 0 else map.knownSize
-      def nextField(): SimpleValueFieldInput = it.next()
+      override def nextField(): SimpleValueFieldInput = it.next()
       override def peekField(name: String): Opt[SimpleValueFieldInput] =
         map.get(name).map(new SimpleValueFieldInput(name, _)).toOpt // values may be null!
-      def hasNext: Boolean = it.hasNext
+      override def hasNext: Boolean = it.hasNext
     }
 
   def readList(): ListInput =
     new ListInput {
       private val inputSeq: BSeq[Any] = doRead[BSeq[Any]]
       private val it = inputSeq.iterator.map(new SimpleValueInput(_))
       override def knownSize: Int = if(inputSeq.isEmpty) 0 else inputSeq.knownSize
-      def nextElement(): SimpleValueInput = it.next()
-      def hasNext: Boolean = it.hasNext
+      override def nextElement(): SimpleValueInput = it.next()
+      override def hasNext: Boolean = it.hasNext
     }
 
-  def skip(): Unit = ()
+  override def skip(): Unit = ()
 }
 
 class SimpleValueFieldInput(val fieldName: String, value: Any)

core/src/test/scala/com/avsystem/commons/concurrent/ObservableExtensionsTest.scala

@@ -16,7 +16,7 @@ class ObservableExtensionsTest extends AnyFunSuite with Matchers
   private implicit val scheduler: Scheduler = Scheduler(RunNowEC)
 
   test("headOptL") {
-    forAll { ints: List[Int] =>
+    forAll { (ints: List[Int]) =>
       Observable.fromIterable(ints).headOptL.runToFuture.futureValue shouldBe ints.headOpt
     }
   }
@@ -26,7 +26,7 @@ class ObservableExtensionsTest extends AnyFunSuite with Matchers
   }
 
   test("findOptL") {
-    forAll { ints: List[Int] =>
+    forAll { (ints: List[Int]) =>
       Observable.fromIterable(ints).findOptL(_ > 1).runToFuture.futureValue shouldBe ints.findOpt(_ > 1)
     }
   }
@@ -38,13 +38,13 @@ class ObservableExtensionsTest extends AnyFunSuite with Matchers
   }
 
   test("distinct") {
-    forAll { ints: List[Int] =>
+    forAll { (ints: List[Int]) =>
       Observable.fromIterable(ints).distinct.toListL.runToFuture.futureValue shouldBe ints.distinct
     }
   }
 
   test("distinctBy") {
-    forAll { ints: List[Int] =>
+    forAll { (ints: List[Int]) =>
       val f: Int => Int = _ % 256
 
       Observable.fromIterable(ints).distinctBy(f).toListL.runToFuture.futureValue shouldBe
@@ -53,20 +53,20 @@ class ObservableExtensionsTest extends AnyFunSuite with Matchers
   }
 
   test("sortedL") {
-    forAll { ints: List[Int] =>
+    forAll { (ints: List[Int]) =>
       Observable.fromIterable(ints).sortedL.runToFuture.futureValue shouldBe ints.sorted
     }
   }
 
   test("sortedByL") {
-    forAll { ints: List[Int] =>
+    forAll { (ints: List[Int]) =>
       val f: Int => Int = _ % 256
       Observable.fromIterable(ints).sortedByL(f).runToFuture.futureValue shouldBe ints.sortBy(f)
     }
   }
 
   test("toL") {
-    forAll { ints: List[(Int, Int)] =>
+    forAll { (ints: List[(Int, Int)]) =>
       def testFactory[T](factory: Factory[(Int, Int), T])(implicit position: Position) =
         Observable.fromIterable(ints).toL(factory).runToFuture.futureValue shouldBe factory.fromSpecific(ints)
 
@@ -100,7 +100,7 @@ class ObservableExtensionsTest extends AnyFunSuite with Matchers
   }
 
   test("mkMapL") {
-    forAll { ints: List[Int] =>
+    forAll { (ints: List[Int]) =>
       Observable.fromIterable(ints).mkMapL(_ % 3, _ + 2).runToFuture.futureValue shouldBe ints.mkMap(_ % 3, _ + 2)
     }
   }

core/src/test/scala/com/avsystem/commons/concurrent/TaskExtensionsTest.scala

@@ -24,7 +24,7 @@ class TaskExtensionsTest extends AnyFunSuite with Matchers with ScalaCheckDriven
   }
 
   test("traverseMap") {
-    forAll { data: List[(String, Int)] =>
+    forAll { (data: List[(String, Int)]) =>
       val map = data.toMap
       val expected = map.view.map({ case (key, value) => (key + key, value + 2) }).toMap
       val result = Task.traverseMap(map)({ case (key, value) => Task((key + key, value + 2)) }).runToFuture.futureValue
@@ -33,7 +33,7 @@ class TaskExtensionsTest extends AnyFunSuite with Matchers with ScalaCheckDriven
   }
 
   test("traverseMapValues") {
-    forAll { data: List[(String, Int)] =>
+    forAll { (data: List[(String, Int)]) =>
       val map = data.toMap
       val expected = map.view.mapValues(value => value + 2).toMap
       val result = Task.traverseMapValues(map)({ case (key, value) => Task(value + 2) }).runToFuture.futureValue

core/src/test/scala/com/avsystem/commons/serialization/IsoInstantTest.scala

@@ -26,7 +26,7 @@ class IsoInstantTest extends AnyFunSuite with ScalaCheckPropertyChecks {
 
   test("roundtrip") {
     val genTstamp = Gen.choose[Long](-(1L << 50), 1L << 50)
-    forAll(genTstamp) { l: Long =>
+    forAll(genTstamp) { (l: Long) =>
       assert(IsoInstant.parse(IsoInstant.format(l)) == l)
     }
   }

core/src/test/scala/com/avsystem/commons/serialization/json/JsonStringInputOutputTest.scala

@@ -205,7 +205,7 @@ class JsonStringInputOutputTest extends AnyFunSuite with SerializationTestUtils
   }
 
   test("serialize all types") {
-    forAll { item: CompleteItem =>
+    forAll { (item: CompleteItem) =>
       val serialized = write(item)
       val deserialized = read[CompleteItem](serialized)
 
@@ -363,7 +363,7 @@ class JsonStringInputOutputTest extends AnyFunSuite with SerializationTestUtils
         Gen.sized(sz => sized(math.min(sz, 1)))
       }
 
-    forAll { dncc: DeepNestedTestCC =>
+    forAll { (dncc: DeepNestedTestCC) =>
       val serialized = write(dncc)
       val deserialized = read[DeepNestedTestCC](serialized)
 

jetty/src/test/scala/com/avsystem/commons/jetty/rpc/JettyRPCFrameworkTest.scala

@@ -53,7 +53,7 @@ class JettyRPCFrameworkTest extends AnyFunSuite with ScalaFutures with Matchers
   val impl: SomeApi = new SomeApi {
     override def keks: Future[Long] = Future.successful(keksResult)
     override def isTop(keks: Long): Future[Boolean] = Future.successful(keks == Int.MaxValue)
-    override val topper = new TopperImpl("%s", topKeksResult)
+    override val topper: TopperImpl = new TopperImpl("%s", topKeksResult)
     override def differentTopper(helloPattern: String): Topper = new TopperImpl(helloPattern, topKeksResult)
     override def erroneousKeks: Future[Int] = Future.failed(new RuntimeException("cannot into"))
   }

mongo/jvm/src/test/scala-2.13/com/avsystem/commons/mongo/typed/PolyDataWithCustomImplicits.scala

@@ -8,7 +8,7 @@ case class CustomWrappy(value: String)
 
 object CustomImplicits {
   implicit val customWrappyCodec: GenCodec[CustomWrappy] =
-    GenCodec.transformed[CustomWrappy, String](_.value, CustomWrappy)
+    GenCodec.transformed[CustomWrappy, String](_.value, CustomWrappy.apply)
 }
 
 abstract class CustomPolyDataCompanion[D[_]](

mongo/jvm/src/test/scala/com/avsystem/commons/mongo/BigDecimalEncodingTest.scala

@@ -6,7 +6,7 @@ import org.scalatestplus.scalacheck.ScalaCheckPropertyChecks
 
 class BigDecimalEncodingTest extends AnyFunSuite with ScalaCheckPropertyChecks {
   test("BigDecimal BSON encoding") {
-    forAll { value: BigDecimal =>
+    forAll { (value: BigDecimal) =>
       assert(value == BsonInput.bigDecimalFromBytes(BsonOutput.bigDecimalBytes(value)))
     }
   }

mongo/jvm/src/test/scala/com/avsystem/commons/mongo/Decimal128UtilsTest.scala

@@ -8,7 +8,7 @@ import org.scalatestplus.scalacheck.ScalaCheckPropertyChecks
 
 class Decimal128UtilsTest extends AnyFunSuite with ScalaCheckPropertyChecks {
   test("Decimal128Utils.fromBigDecimal is equivalent to new Decimal128") {
-    forAll(Arbitrary.arbitrary[BigDecimal]) { bd: BigDecimal =>
+    forAll(Arbitrary.arbitrary[BigDecimal]) { (bd: BigDecimal) =>
       val usingUtils = Decimal128Utils.fromBigDecimal(bd)
       val usingConstructor = try new Decimal128(bd.bigDecimal).opt catch {
         case _: NumberFormatException => Opt.Empty

project/Commons.scala

@@ -134,6 +134,7 @@ object Commons extends ProjectGroup("commons") {
       "-language:experimental.macros",
       "-language:higherKinds",
       "-Xfatal-warnings",
+      "-Xsource:3",
       "-Xlint:-missing-interpolator,-adapted-args,-unused,_",
       "-Ycache-plugin-class-loader:last-modified",
       "-Ycache-macro-class-loader:last-modified",