June 2018 Update

Task/Scope-Function-names-and-labels/Scala/scope-function-names-and-labels.scala

@@ -0,0 +1,55 @@
+object ScopeFunction extends App {
+  val c = new C()
+  val d = new D()
+  val n = 1
+
+  def a() = println("calling a")
+
+  trait E {
+    def m() = println("calling m")
+  }
+
+  a() // OK as a is internal
+  B.f() // OK as f is public
+
+  class C {
+    // class level function visible everywhere, by default
+    def g() = println("calling g")
+
+    // class level function only visible within C and its subclasses
+    protected def i() {
+      println("calling i")
+      println("calling h") // OK as h within same class
+      // nested function in scope until end of i
+      def j() = println("calling j")
+
+      j()
+    }
+
+    // class level function only visible within C
+    private def h() = println("calling h")
+  }
+
+  c.g() // OK as g is public but can't call h or i via c
+
+  class D extends C with E {
+    // class level function visible anywhere within the same module
+    def k() {
+      println("calling k")
+      i() // OK as C.i is protected
+      m() // OK as E.m is public and has a body
+    }
+  }
+
+  d.k() // OK as k is public
+
+  object B {
+    // object level function visible everywhere, by default
+    def f() = println("calling f")
+  }
+
+  val l = (i:Int, j: Int) => println(i,j)
+
+  println("Good-bye!") // will be executed
+
+}