Upgraded scala-core-oop module to Scala 3

Author: yadavan88

build.sbt

@@ -118,6 +118,7 @@ lazy val scala_core_io = (project in file("scala-core-modules/scala-core-io"))
 lazy val scala_core_oop = (project in file("scala-core-modules/scala-core-oop"))
   .settings(
     name := "scala-core-oop",
+    scalaVersion := scala3Version,
     libraryDependencies ++=
       Seq(catsEffect, jUnitInterface) ++ scalaTestDeps
   )

scala-core-modules/scala-core-oop/README.md

@@ -11,6 +11,5 @@ This module contains articles about Scala's Object Oriented Programming features
 - [Classes and Objects in Scala](https://www.baeldung.com/scala/classes-objects)
 - [Difference Between Case Object and Object](https://www.baeldung.com/scala/case-object-vs-object)
 - [Object Oriented Programming in Scala](https://www.baeldung.com/scala/oop-intro)
-- [Demystifying View and Context Bounds](https://www.baeldung.com/scala/view-context-bounds)
 - [Polymorphism in Scala](https://www.baeldung.com/scala/polymorphism)
 - [Lifting in Scala](https://www.baeldung.com/scala/lifting)

scala-core-modules/scala-core-oop/src/main/scala-2/com/baeldung/scala/caseobject/ObjectExample.scala renamed to scala-core-modules/scala-core-oop/src/main/scala/com/baeldung/scala/caseobject/ObjectExample.scala

@@ -20,7 +20,7 @@ object ObjectExample extends App {
   }
 
   // Throws exception in case we call FlyingObject other than airplane and bird
-  def nonExhaustive(objects: FlyingObject.Value) {
+  def nonExhaustive(objects: FlyingObject.Value) = {
     objects match {
       case FlyingObject.airplane => println("I am an airplane")
       case FlyingObject.bird     => println("I am a bird")

scala-core-modules/scala-core-oop/src/main/scala-2/com/baeldung/scala/classcompositionwithtraits/CarTraits.scala renamed to scala-core-modules/scala-core-oop/src/main/scala/com/baeldung/scala/classcompositionwithtraits/CarTraits.scala

@@ -5,15 +5,15 @@ object ClassExamples {
   val constA = "A"
   val constB = 4
   class Abc(var a: String, var b: Int) {
-    def this(a: String) {
+    def this(a: String) = {
       this(a, constB)
       this.a = a
     }
-    def this(b: Int) {
+    def this(b: Int) = {
       this(constA, b)
       this.b = b
     }
-    def this() {
+    def this() = {
       this(constA, constB)
     }
   }

scala-core-modules/scala-core-oop/src/main/scala-2/com/baeldung/scala/classvsobject/ClassExamples.scala renamed to scala-core-modules/scala-core-oop/src/main/scala/com/baeldung/scala/classvsobject/ClassExamples.scala

@@ -5,4 +5,5 @@
 - [Implicit Conversions](https://www.baeldung.com/scala/implicit-conversions)
 - [Reading Command-Line Arguments in Scala](https://www.baeldung.com/scala/read-command-line-arguments)
 - [Introduction to Scala Macros](https://www.baeldung.com/scala/scala2-macros)
-- [Introduction to Macros in Scala 2](https://www.baeldung.com/scala/scala2-macros)
+- [Introduction to Macros in Scala 2](https://www.baeldung.com/scala/scala2-macros)
+- [Demystifying View and Context Bounds](https://www.baeldung.com/scala/view-context-bounds)