Example refinements

Author: Dean Wampler

src/script/scala/progscala3/BracesSyntax.scala

@@ -1,6 +1,17 @@
 // src/script/scala/progscala3/BracesSyntax.scala
+
+// For completeness, Scala 2 imports, not allowed in Scala 3:
+import scala.concurrent._
+import java.util.{Queue => JQueue}
+import java.util.{HashMap => JHashMap, HashSet => _}
+
 // Braces syntax - valid in both Scala 2 and 3
 
+// Package definition
+// package mypkg {  // Can't declare a package in a script!
+//   // stuff under mypkg...
+// }
+
 // For comprehension
 val evens = for {
   i <- 0 until 10
@@ -58,11 +69,6 @@ def multiline(s: String): String = {
   result
 }
 
-// Package definition
-package mypkg {
-  // ...
-}
-
 // Trait, class, and object definition
 trait Monoid[A] {
   def add(a1: A, a2: A): A

src/script/scala/progscala3/IndentationSyntax.scala

@@ -1,6 +1,16 @@
 // src/script/scala/progscala3/IndentationSyntax.scala
+
+// For completeness, Scala 3 imports:
+import scala.concurrent.{given, *}
+import java.util.Queue as JQueue
+import java.util.{HashMap as JHashMap, HashSet as _}
+
 // Significant indentation syntax
 
+// Package definition
+// package mypkg:   // Can't declare a package in a script!
+  // stuff under mypkg...
+
 // For comprehension
 val evens = for
   i <- 0 until 10
@@ -53,10 +63,6 @@ def multiline(s: String): String =
   println(s"output: $result")
   result
 
-// Package definition
-package mypkg:
-  // ...
-
 // Trait, class, and object definition
 trait Monoid[A]:
   def add(a1: A, a2: A): A

src/script/scala/progscala3/meta/inline/Transparent.scala

@@ -1,9 +1,12 @@
 // src/script/scala/progscala3/meta/inline/Transparent.scala
 
 open class C1
-class C2 extends C1
+class C2 extends C1:
+  def hello = "hello from C2"
 
 transparent inline def make(b: Boolean): C1 = if b then C1() else C2()
 
 val c1: C1 = make(true)                 // <1>
+// c1.hello                             // C1.hello doesn't exist!
 val c2: C2 = make(false)                // <2>
+c2.hello                                // Allowed!