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Scala example source code file (t1786.scala)

This example Scala source code file (t1786.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Scala tags/keywords

any, application, application, myclass, myclass, someclass, someclass, test, test

The Scala t1786.scala source code

/** This a consequence of the current type checking algorithm, where bounds
 *  are checked only after variables are instantiated. I believe this will change once we go to contraint-based type inference. Assigning low priority until then.
 * 
 *
 */
class SomeClass(val intValue:Int)
class MyClass[T <: SomeClass](val myValue:T) 

object Test extends Application {
  def myMethod(i:MyClass[_]) {
    i.myValue.intValue/2      // << error i is of type Any
  }

  def myMethod(i:MyClass[_ <: SomeClass]) {
    i.myValue.intValue/2      // << works
  }
}
/*
The below code shows a compiler flaw in that the wildcard "_" as value for a bounded type parameter either breaks the boundry - as it result in Any - or doesnt (as id hoped it to be) evaluates to the boundy.
*/

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